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S1369703X20302564
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The microbial production of polyhydroxyalkanoates has attracted huge scientific and industrial interest . However prerequisite to the economically feasible transition from the research scale towards industrial and highly competitive processes is the optimal production of PHAs in a consistent and systematic manner . The use of rigorous experimentally verified mathematical models enabling the optimal dynamic operation of the fermentative production of PHAs is a promising alternative route against any low yield empirical handling implemented so far . The present study investigates the model based dynamic optimization of poly 3 hydroxybutyrate production in
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Model based dynamic optimization of poly 3 hydroxybutyrate production. Use of rigorous and validated macroscopic kinetic and oxygen mass transfer model. Optimal production of PHAs in a consistent and systematic manner. Dynamic optimization scenarios for fed batch and continuous bioreactors. A comparison study of optimal fed batch and continuous PHB production campaign.
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S1369703X20302576
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An alternative downstream process for the purification of a monoclonal antibody based on aqueous two phase extraction as clarification capture and primary purification step was developed . For further purification unit operations which are commonly used for mAb platform processes were utilized . A diafiltration approach was used to combine virus inactivation and removal of phase forming components as well as low molecular weight impurities in one step followed by cation and anion exchange chromatography . Starting from cell containing cultivation broth an overall mAb yield of 74 was achieved within an application study . The process was optimized regarding mAb yield and the clearance of process related impurities like deoxyribonucleic acid as well as host cell proteins which were removed to approximately 60 and 6000ppm respectively . Critical product quality attributes regarding glycosylation patterns were also examined and remained unimpaired after the aqueous two phase extraction . The alternative downstream process presented in this study offers great potential to improve mAb manufacturing .
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New alternative downstream process based on ATPS without protein A chromatography. A holistic development as well as optimization of the individual unit operations is demonstrated. 74 yield of mAb with simultaneous removal of DNA 99.97 and HCP 97.11 . mAb glycosylation pattern remained unimpaired after ATPE and throughout the alternative DSP stable product quality .
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S1369703X20302588
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Neryl acetate a monoterpenoid derivate originated from neryl diphosphate has found extensive applications in food agriculture and cosmetic fields . In this study neryl acetate was biosynthesized in recombinant
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Neryl diphosphate originated monoterpenoid derivate neryl acetate was biosynthesized for the first time. Alcohol acetyltransferase esterify nerol and acetyl CoA to form neryl acetate. Further overexpression of tHMG1 in MVA pathway enhanced neryl acetate production. Pyruvate was beneficial to neryl acetate accumulation in
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S1369703X2030259X
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Marine organic colloids cause serious membrane fouling in the process of seawater desalination . Hence this study was designed to efficiently eliminate MOCs by biomineralization of forming calcium carbonate phosphate precipitate . Results showed that crystal formed by calcium solution and carbonate dosage was calcite while the precipitate of calcium solution with phosphate was similar to hydroxyapatite . MOCs in the solution were throughout involved in forming the calcite and hydroxyapatite precipitates . The removal rates of protein acid polysaccharide and humic acid in the MOCs by forming hydroxyapatite approached 56.56 86.07 and 95.34 extremely higher than that of calcite . Finally MOCs removal mechanism by the biomineralization was proposed where calcium ions were firstly absorbed by functional groups of organic macromolecules in the solution then the added carbonate or phosphate anions were attracted by calcium ion and finally the crystal growth occurred with macromolecules as templates . The present results might provide a new idea for the engineers to solve the problem of membrane fouling and thus present promising application in desalination process .
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Biomineralization of calcium salt precipitates removed marine organic colloids. Ca. PO. formation removed more protein acid polysaccharide humic acid in MOCs. Crystal of calcium carbonate was calcite and calcium phosphate was hydroxyapatite. MOCs was involved in forming the calcite and hydroxyapatite precipitates. MOCs removal mechanism by the biomineralization was proposed.
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S1369703X20302618
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5GB1 has been identified as a promising biocatalyst for industrial methane conversion to produce value added products . However despite recent advancements in understanding the metabolism of 5GB1 existing knowledge on the differences between oxygen limited and methane limited phenotypes is still limited . In this work both batch and continuous experiments were carried out to systematically examine the strains oxygen limited and methane limited phenotypes . Total carbon balances were performed to ensure the obtained measurements of CH
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partial pressure determines the cell growth rate for batch growth. Cell growth rate has to be controlled to achieve different phenotypes. For continuous culture cells prior growth condition affects current physiology. Carbon limited growth condition produces more organic compounds. The current GEM lacks key metabolic routes to explain different phenotypes.
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S1369703X20302631
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A coupled residence time distribution and mixed order model was developed to simulate the performance of a pilot high rate algal pond for wastewater treatment under different operational conditions requiring simple influent and effluent wastewater characteristics as input data . The model showed potential in general assessment of the HRAP system performance successfully capturing the magnitude as well as general trend of COD TKN TN and TP concentrations with acceptable accuracy value up to 0.99 . However due to the common limitation of black box model type the detailed agreement between model and experimental data was highly varied sometime unsatisfactory performance was obtained especially for highly complex processes like TKN or TN removal . Besides general information on the dynamics of algal bacterial processes under different operational conditions could be revealed by analyzing calibrated reaction order n and reaction rate constant k
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A coupled residence time distribution and mixed order kinetic model was developed. Only influent and effluent wastewater characteristics were required as input data. Adequate accuracy was obtained in general assessment of the HRAP system performance. Calibrated reaction order and reaction rate constant agreed with system dynamic. The model showed potential of a convenient support for HRAP design and construction.
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S1369703X20302643
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It is expected that a high cell volumetric concentration of human mesenchymal stromal cells for cell therapy can be achieved by using scalable cell culture platforms as bioreactors . In this paper the Taylor vortex flow bioreactor was evaluated for hMSCs expansion due to its potential to produce low and homogeneous hydrodynamic forces which is important for the expansion of these cells . Thus parameters such as volumetric coefficient of oxygen transfer and shear stress were estimated for the TVFB . Additionally hMSCs cell expansion on microcarriers was evaluated in TVFB and compared with the traditional spinner flasks . Maximum shear stress and k
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Taylor vortex flow bioreactor TVFB supports scalable manufacturing of human mesenchymal stromal cells MSC on microcarriers. Cells post expansion preserved the MSC identity. Cell microcarrier aggregates formed in the TVFB were smaller than obtained in Spinner flask.
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S1369703X20302655
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The application of aerobic granular sludge in continuous flow treatment of real organic industrial wastewater has been a current research hotspot . This research explored the feasibility of real ethylene glycol wastewater treatment by aerobic granular sludge in a continuous flow process . In this study an 80 day continuous flow reactor operation was established to investigate the toxic effects of ethylene glycol industrial wastewater on aerobic granular sludge and the resistance mechanism of aerobic granules during long term operation . Results revealed that after 40 days of domestication the degradation rate of COD for 2000150mg L remained above 85 and EG concentration was below the detection limit . Flow cytometry results showed that the toxicity of ethylene glycol to cells was mainly reflected in the destruction of cell membranes leading to the decline of the microbial activity . Long term exposure to ethylene glycol industrial wastewater would reduce the mechanic strength of aerobic granules . Through metagenomic sequencing technology it was confirmed that the ability to metabolize organic matter and the defense function were improved by microorganisms in aerobic granules during the process however the productivity of cells was reduced and both the intracellular repair and cytoskeleton synthesis of AGS were inhibited . Based on the KEGG database a metabolic network of ethylene glycol from granular sludge microorganisms was reconstructed .
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AGS was used in a continuous flow reactor treating real wastewater containing EG. 2.A stable COD removal was achieved at an influent concentration of about 2000mg L. 3.Toxicity of EG to microorganisms reflected in the destruction of cell membranes. 4.The defense function rather than repair was enhanced by microorganisms at EG stress.
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S1369703X20302667
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Lytic polysaccharide monooxygenase a kind of copper dependent oxidases has been widely used for the efficient enzymatic hydrolysis of lignocellulosic biomass . In this study a gene encoding the LPMO from
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A high yield of. C1LPMO was secreted using its native signal peptide. C1LPMO with a purity of more than 95 and purification yield of 46 mg L was obtained. The purified enzyme exhibited high stability towards at 4060 C. C1LPMO had great potential in the degradation of microcrystalline cellulose. Molecular docking simulations explored the interaction of. C1LPMO and cellohexaose.
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S1369703X20302679
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A novel bioflocculant alginate protamine complex was developed and was proposed in this study . Alginate and protamine have no flocculating ability solely however the mixture solution of alginate and protamine or alginate protamine complex showed a good flocculating ability . This study reported a flocculating performance of the alginate protamine complex . The flocculation performance was evaluated by clarification experiment with kaolin and pulverized quartz sand in terms of relative absorbance . The flocculation performance was examined by varying experimental conditions especially alginate protamine mass mixing ratio and pH . The flocculation performance was significantly affected by the mass mixing ratio and pH . The most effective mass mixing ratio was found at 0.40.8 in the pH range of 37 . The flocculation performance was also affected significantly by pH . Good flocculation performance was provided at pH 37 however the performance was getting worse at pH 811 .
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Flocculation ability appeared by forming associated complex of alginate and protamine. Most effective mass mixing ratio was found at 0.40.8 in the present system. Flocculation efficiency by the complex is effective in acidic and neutral pH range.
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S1369703X20302680
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The extraction of energy from wastewater organic matter by microbial electrolysis cells is a promising idea . However different challenges have to be overcome before this technology can be used in a practical application . One of the most important is the development of reactor configurations that can be able to produce higher external current and thereby a larger amount of energy carriers without significant deterioration of cell performance . Thus a comprehensive 3D model developed in this work aims to investigate distributions of current potential and concentrations inside a MEC reactor and their effect on overpotential distribution over the surface of electrodes to evaluate the reactor performance . The model is applied to simulate a flow reactor designed with 147.6m
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Bioelectrochemical and transport processes were coupled in a comprehensive model. 3D simulation of MEC reactor packed with small blocks as bioanodes was performed. The flow pattern and potential distribution determine the local current distribution. Simulation shows the crucial role of geometric design on local performance of MEC. Modeling current density and hydrogen production agree closely with experimental data.
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S1369703X20302709
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A comparison between a mixed aerobic anoxic horizontal fixed bed reactor and an aerobic horizontal fixed bed reactor coupled with an anoxic vertical fixed bed reactor was made in order to evaluate the nitrogen removal behavior when nitrification and sulfide driven autotrophic denitrification occurred in a single unit or spatially separated . Both systems achieved Total N removal efficiencies higher than 89 . Moreover for both reactors the effluent pH was affected for bicarbonate alkalinities lower than 250mg CaCO
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Total N removal higher than 89 was achieved for both reactors. Biomass discharges enhanced nitrogen removal efficiencies. Insights regards O. impacts on S. production at N S ratios 0.55 were addressed.
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S1369703X20302710
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Biological sulphate reduction and partial sulphide oxidation occurring simultaneously within the hybrid linear flow channel reactor were evaluated under controlled conditions at laboratory scale as a function of hydraulic residence time using a synthetic media containing 1g L sulphate . The hybrid LFCR comprises a rectangular channel containing carbon microfibers as a support matrix for attachment of sulphate reducing bacteria and an exposed air liquid interface to facilitate the formation of a floating sulphur biofilm . Exposure to decreasing HRT from 3 days to 12h resulted in an increase in the volumetric sulphate reduction rate achieving levels typically associated with active reactors . Sulphate conversion was highest at a 3 day HRT decreasing to 73 at 12h . The highest sulphide removal efficiency and accompanying sulphur recovery through harvesting of the floating sulphur biofilm was observed at a 2 day HRT . The sulphur fraction not recovered through the biofilm was predominantly released within the effluent as colloidal elemental sulphur and fragments of the sulphur rich biofilm with minimal re oxidation to sulphate occurring in the reactor . The hybrid LFCR technology was able to achieve high rates of sulphate reduction and effective sulphide removal within a single semi passive reactor unit .
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Simultaneous BSR and partial sulphide oxidation achieved in a single open reactor. High volumetric rates and sulphate conversion achieved at a low HRT of 12h. Semi passive system achieved similar BSR performance to active equivalents. Biomass retention ensured system robustness and resilience at low HRT. Shift in lactate metabolism from oxidation to fermentation as HRT decreased.
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S1369703X20302722
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Transaminase serves as an attractive biocatalyst for the asymmetric synthesis of chiral amines from prochiral ketones . However the TA reactions suffer from exceedingly unfavorable equilibrium and severe product inhibitions . Most reaction engineering strategies to overcome such limitations have focused on coproduct removal which fails to mitigate enzyme inhibition by the desired amine product . Herein we demonstrated in situ removal of both inhibitory products using ion exchange resin .
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Ion exchange resins afforded virtually inhibition free transaminase reactions. physical removal of both products was established for the first time. Model predictions based on Langmuir analysis enabled process optimization. A batch recirculation reactor was constructed for a preparative scale reaction. Consecutive ion exchange resin columns enabled facile recovery of both products.
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S1369703X20302771
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Glycyrrhetinic acid is a pentacyclic hydrophobic aglycon with many biological activities and pharmacological manifestations . Apart from its remarkable bioactivities GA has limitation in terms of its hydrophobicity which can be resolved through the glycosylation . In this study UGTs
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Glycodiversification of Glycyrrhetinic acid by UDP glycosyltransferases UGTs from. Glycosylation of Glycyrrhetinic acid to yield GA 3 O. glucoside and GA 30 O. glucoside. Optimization of Glycyrrhetinic acid glycosylation by UGTs and kinetic analysis.
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S1369703X20302783
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Maltooligosyltrehalose synthase is a key enzyme in the preparation of trehalose . Increasing interest in trehalose requires further improvement in the catalytic performance of MTSase in order to increase trehalose yield but so far the reports about modification of MTSase revealed that the trahalose yield was increased only by 1 . In this study the mutant S44P of MTSase from
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The high throughput screening method for catalytic efficiency of MTSase was built up. The mutate exhibited a significantly increased trehalose yield and improved thermostability. The first crystal structures of the mutate and wild type enzyme was solved. The structures elucidated the changed properties.
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S1369703X20302795
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We prepared phospholipid vesicles in continuous dilution from small phospholipid bilayer bicelles . As vesicles are useful as delivery carriers it is necessary to develop a method of continuous encapsulation . Bicelles are composed of long chain 1 2 dimyristoyl
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Vesicle preparation method using discoidal bicelle membrane was introduced as a drug carrier preparation method. Vesicles were prepared by serially diluting the bicelle. Vesicles prepared from bicelles had membrane properties comparable to vesicles prepared by conventional methods. With this method vesicles can be prepared continuously in aqueous solution.
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S1369703X20302801
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Marine biological resources are significant sources of biological and chemical processes and principles from which new bioactive compounds can be explored . Here we report a new silica forming peptide called Kpt derived from a membrane protein in
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Kpt KPTHHHHHHDG was found and characterized as a new silica forming peptide. Kpt showed a high silicification activity and a high affinity with Ni IDA resin. Kpt fusion protein can be easily purified by His tag affinity chromatography system. Kpt fusion ferritin was prepared and employed for the generation of biosilica particles.
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S1369703X2030293X
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Mycobacteria is important microbial cell factory in the steroid industry and there is an urgent need to develop synthetic biology toolkit to regulate the expression level of genes in mycobacterial strains . In this study we first evaluated the adaptation of seven promoters in
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Stronger promoters obtained by connecting promoters to increase sigma factor recognition region. The A U rich RBS sequences improve gene expression in mycobacteria. The synthetic biology toolkit can ease the metabolic bottleneck of
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S1369703X20302941
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The development of cost effective bioreactors and scalable methods for the high quantities of bacteriophage production meets the global demand for phage therapy . This study demonstrates the potential application of a novel PES STiO
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A PES STiO. nanocomposite membrane NCM was fabricated. phage production in the membrane supported reactor was performed. NCM retains the phage and enhances the rate of phage production in the reactor. NCM can performs without loss of bacteria and phage and prevents the biofouling. The phage production increased with increasing the cycles compared to the reported rectors.
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S1369703X20302965
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Chinese hamster ovary cells are commonly used in the biopharmaceutical industry for production of biotherapeutics and process improvements that increase their productivity can save time and reduce costs . We describe a novel method to enhance cellular productivity through adding nitric oxide . NO increased specific productivity by 142 resulting in higher antibody titers by an average of 17 compared to the conventional process . Product quality analysis showed comparable profiles between the NO treated and control cell cultures with NO causing a minor reduction of fucose content . NO sparging enhanced productivity by altering cell growth profiles inducing an oxidative stress response and delaying apoptosis .
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This paper used nitric oxide to increase specific productivity in a CHO process. Nitric oxide improved late day specific productivity by 142 compared with control. Nitric oxide increased titers by 17 compared with control. Comparable product qualities were observed whether nitric oxide was added or not. The mechanism was through induction of CHO cells oxidative stress response.
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S1369703X20302977
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Greener process synthesis for drug production focuses on the replacement of chemical processes with biological processes . However optimization of these processes remains challenging due to lack of experimental data particularly for long term passaging and suitable parameter estimation techniques . In this context we propose a mixed passaging scheme containing the co culture of
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Implementation of mixed culture of. and. for indole production. Unstructured model selection using Genetic Algorithm. Parameter estimation of mixed culture model using control vector parameterization. Proposed model can capture the pure and individual cuture dynamics in 6L fermenter.
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S1369703X20302989
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The early stage attachment behaviors of acidophiles on mineral surfaces and the subsequent biofilm formation play important roles in acid mine drainage production and also can improve the leaching efficiency of metal sulfides . However despite significant advances in correlational researches of mesophilic bacteria studies on thermoacidophilic archaeon are still limited . In this study the early attachment behaviors and biofilm formation of the thermoacidophilic archaeon
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Multi layer adsorption of A. manzaensis YN 25 to mineral surfaces was transitory. Attached cells on chalcopyrite were higher because of higher adhesion force. Surface coverage of biofilm was positively correlated with the initial adhesion. Dead cells have accounted for a big proportion in. YN 25 biofilm.
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S1369703X20302990
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Fermentation aiming at oil production has emerged as an outstanding technique but an undesirable emulsion can be formed preventing oil separation . There is still little knowledge about the mechanisms triggering the formation of such emulsions . Although this phenomenon is partly attributed to the cells presence other essential compounds can contribute to the stability of emulsions due to their surface properties . Thus this study aimed at investigating the mechanisms of emulsions stabilization by
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Energy density and antifoams features are major factors affecting emulsion stability. Yeast cells and antifoaming agents promoted formation of undesirable cream phase. Antifoams can interfere on physical properties of yeast cells. Emulsifier activity of antifoams depend on their physicochemical properties. The set of methodologies can be used as a tool to choose broth composition.
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S1369703X20303004
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The rheological characteristics of cultivations with filamentous microorganisms define many other crucial process parameters in the system such as the cell morphology and the productivity . The present study aims to determine the rheological changes of broths during batch cultivations of three filamentous microorganisms the fungus
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Broths of. exhibit non Newtonian rheology. Suitable rheometer geometry and measuring method varies for each cultivation broth. Broth viscosity and flow consistency factor increase with biomass growth. Broth viscosity increases with increased pellet roughness and decreased compactness. Xanthan gum solutions can be used as model fluids for. and
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S1369703X20303016
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The use of whole cell biocatalyst for production of fructo oligosaccharide eliminates the need for costly enzyme recovery and purification . In this study a novel
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A novel. strain was selected to produce intracellular FOS synthase. The strain had a high transfructosylating activity of 4.44U mg dry cells. The whole cell biocatalyst had a high U. U. ratio of 18.4. A 61 FOS yield was achieved in 3h from 50 w v sucrose with only 5g L cells. Pre removal of glucose in molasses by an invertase free yeast improved FOS yield.
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S1369703X20303028
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In order to enhance productivity and cost effectiveness of current lipase catalyzed processes of flavonoid esters synthesis different LifeTech ECR carriers varying in functional groups polarity and porosity were hereby screened as immobilization supports for free lipase B from
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CAL B was successfully immobilized onto eight different LifeTech ECR supports. Immobilization onto ECR8409F ECR8806cf and ECR8285F supports were optimized. Novel immobilized preparations show very good activity in flavonoid esterification. Immobilized preparations catalyzed flavonoids transesterification with natural oils. Lipase immobilized onto hydrophobic support show exceptional operational stability.
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S1369703X2030303X
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Miniaturized stirred tank bioreactor systems provide a scalable platform for high throughput bioprocess development . Online measurement of process variables is a major demand to enable efficient process monitoring and control in parallel operated bioreactors . One miniaturized laser light source and two photodiodes were placed around a cylindrical disposable bioreactor made of polystyrene for individual and contact free measurement of optical density . One photodiode was positioned at an angle of 28 to the laser for measuring the scattered light a second photodiode was positioned face to face with the laser for measuring the transmitted light . Miniaturized lasers with wavelengths of 650 nm 780 nm and 850 nm were evaluated . The best results were achieved with a laser emitting at 850 nm . Both signals were influenced by the stirrer speed and the microorganisms under study . After individual calibration online OD monitoring of pH controlled fed batch processes was successfully shown with
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Contact free measurement of optical density OD in mL scale stirred tank bioreactors. Miniaturized laser light source and photodiodes placed around a disposable bioreactor. Online infrared OD monitoring of pH controlled fed batch processes. Online OD monitoring up to cell dry weight concentrations of 46 g L
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S1369703X20303041
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L asparaginase is an important bacterial enzyme used as a biopharmaceutical to treat acute lymphoblastic leukemia . Side effects of LASNase therapy have been counteracted by polyethylene glycol modification of L ASNase however immunogenicity of PEG has been observed in patients . Here we explore L ASNase glycosylation as a biological alternative to the PEGylation industrial process . In our results a recombinant Erwinase expressed in the Glycoswitch
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Erwinase was expressed in. as a glycosylated active enzyme. Erwinase was secreted and glycosylated in one monomeric and two oligomeric forms. Glycosylated Erwinase is able to form a stable and active monomer. The glycosylated Erwinase is less recognized by anti ASNase antibodies.
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S1369703X20303053
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Metabolically regulated transgenic rice cell suspension culture has been developed aiming to be an efficient and cost effective platform for production of rice recombinant butyrylcholinesterase that could be used as a bioscavenger enzyme against organophosphate nerve agents . In two stage batch cultures switching between growth and induction phases by exchanging media the maximum active rrBChE levels were comparable among the bioreactor runs with controlled dissolved oxygen concentrations from 1040 DO and without controlled DO at constant aeration rate . For a single stage batch operation with no media exchange at 40 DO production of rrBChE is triggered simply through sugar depletion due to the uptake of sugar by the cells showing similar maximum active cell associated rrBChE level compared to two stage batch operations . However the bioreactor process using uncontrolled DO no media exchange and half concentration of sucrose resulted in a 1.4 fold increase in the maximum total active rrBChE and 1.6 fold increase of total active rrBChE specific productivity
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No substantial effect of dissolved oxygen on butyrylcholinesterase production. Single stage operation can replace the conventional two stage operation. Strategic simplification of bioreactor process improves butyrylcholinesterase productivity.
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S1369703X20303065
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The microbial pathway of butanol biosynthesis is a unique route for the production of a biomass derived advanced biofuel with high potential to be utilized in place of the fossil fuels . In the present study
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and. co culture was used for ABE production from starch. has significant amylase activity leading to higher starch intake rate in process. Butanol was efficiently produced under aerobic conditions. VFAs formed by. were reassimilated by. for ABE. Process parameters were optimized for higher ABE production.
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S1369703X20303077
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In the bioprocess modeling field a descriptive methodology that explicity considers the interactions between the environment and cells is lacking . This relationship directly affects all kinetics which have so far been formulated through empirical relationship . In this research additional steps were added to a known bioprocess modeling methodology to relate environment and cells to each other . The quantitative validation of the proposed phenomenological based semi physical model was developed for a glucose culture bioprocess carried out by the bacterium
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New mathematical model for a culture bioprocess carried out with. Concentration equations between the culture media and cytoplasm of. Equilibrium distribution curve of acetate in cytoplasm and culture media. Methodology to obtain phenomenological based semi physical models in bioprocesses.
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S1369703X20303089
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Hydrolysis of biomass leads to xylose as one of the primary sugars for fermentation to bioethanol along with glucose . The selection of a suitable microorganism and consequently selection of suitable aeration levels for the selected microorganism plays a significant role in xylose conversion . This work focuses on the kinetics of bioethanol production from xylose using
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Ethanol productivity gL. of 0.75 on microaerobiosis exceed that of 0.16 on anaerobiosis. Ethanol yield and productivity improve with increasing inoculum concentration. Developed model considering oxygen terms predicts xylose ethanol and biomass levels. Validation of the developed model with experiments of this study.
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S1369703X20303090
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Large amounts of straw produced each year are currently wasted . A potential use of this resource in permeable reactive barriers for the denitrification of polluted groundwater has not previously been reported . In this study a field PRB filled with straw based materials was installed to reduce nitrogen transport in the Huaihe River Basin . In initial laboratory scale experiments wheat straw corn straw corncobs and woodchip substrates were investigated through elemental analysis leaching experiments and their functional gene abundance . The carbon and nitrogen contents of the substrates were 39.6248.17 and 0.641.07 . Corn straw 15.12mgg
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NO. N removal of 60 from groundwater was achieved with a straw based PRB. Biodenitrification occurred with waste straw material. No secondary pollution as measured by chromaticity and nitrogen was observed. Agricultural straw is a suitable alternative to woodchip as a PRB filler.
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S1369703X20303107
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Microbial self healing cement based materials have developed into a novel technology in recent years . It has the promising potential to improve self healing capacity of cracks by microbial induced calcium carbonate precipitation . In this paper low alkali sulpho aluminate cement was used as the carrier to protect spores from the high alkalinity environment inside the cement based materials . The protective effect of SC on spores was studied in the simulated pore solution of cement based materials and then area repair ratio recovery ratio of water permeability repair ratio of anti chloride ion penetration and healing depth were used to evaluate the self healing efficiency of cracks . Moreover the precipitates formed at the crack mouth of specimens were analyzed by XRD and SEM equipped with an EDS . The results showed that sulpho aluminate cement had an excellent protective effect for spores and the addition of microbial self healing agent would slightly affect the early mechanical properties of cement based materials but could improve them in later ages . In addition the cracks of microbial group with a width of 0.25 0.35mm were completely filled by CaCO
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Microbial induced calcium carbonate precipitation MICP to repair cracks. Spray dryer was used to transform microbial liquid spores into powdery spores. The precipitates formed at the crack mouth of specimens were CaCO3. Later age cracks of cement based materials could be well repaired by microorganisms. The maximum average healing depth of later age cracks could reach 2895m.
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S1369703X20303119
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Virus like particles are hollow nanoparticles composed of recombinant viral surface proteins without a virus genome . In the present study we investigated the production of influenza VLPs using recombinant insect cells . DNA fragments encoding influenza A virus hemagglutinin and matrix protein 1 were cloned with the
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Influenza A virus like particles VLPs were produced using recombinant insect cells. VLPs were produced using insect cells as host cells without using a baculovirus. A secretory form of VLPs consists of hemagglutinin and matrix protein 1. The VLP productivity is comparable to that of the baculovirusinsect cell system.
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S1369703X20303132
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Glycosylation of flavonoids is one of the most important modifications in flavonoid biosynthesis pathways which contributes to the biochemical activity as well as the solubility of flavonoids . However reports on glycosyltransferases that catalyze specifically the 3 O glycosylation of flavonoids are limited . In the current work three novel flavonoid 3 O glycosyltransferases as well as one UDP rhamnose synthase were identified and functionally characterized using RNA sequencing from
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Three novel glycosyltransferases were identified from Epimedium. These enzymes can transfer glucose galactose rhamnose to C 3 position of flavonoids. These enzymes could recognize prenylated flavonoids as sugar acceptors.
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S1369703X20303156
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During bioconversion of rice straw into ethanol large amount waste water containing various organic compounds is discharged . The aim of this study was to accomplish bioconversion of phenolic acids in waste water generated during ethanol production from rice straw into value added products and 4 vinylphenol to make the process more ecofriendly and reduce ethanol production costs . While PAs at concentration lower than 0.4g L could be converted into 4 VG and 4 VP higher PAs concentration caused PAs stress in
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PAs derived from rice straw could be converted into 4 VG and 4 VP. PAs inhibited the growth of. SPs could alleviate PAs stress by inducing formation of EMs by. This study proposed an integrated process for the use of rice straw.
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S1369703X20303168
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Malate has been widely used as a fine chemical and its production by microbial fermentation has attracted significant attention recently . Succinate producer
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A temperature sensitive Mdh was employed for malate production. Malate production was enhanced by overexpression of native FumC. Malate production was improved by deactivation of major malic enzymes SfcA and MaeB. 26.4g L malate was produced from 30g L glucose in NBS medium.
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S1369703X2030317X
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The wide application of immunochromatographic assays in modern diagnostic practice makes their theoretical description relevant which makes it possible to predict the influence of various factors on assay characteristics . We propose a new analytical model of the immunochromatographic assay in a competitive format for non equilibrium conditions a distinctive feature of which is the approximation of an irreversible reaction that allows us to obtain a symbolic solution of differential equations describing the system . We show that due to the rapid nature of the immunochromatographic assay this approximation is satisfied with a high accuracy within the actual range of kinetic dissociation constants characteristic of immune interactions . The criterion for the applicability of such a model is that the kinetic dissociation constant of the immune complex is less than 10
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A new analytical model of the competitive immunochromatography has been proposed. The model allows estimating the influence of the initial conditions on the signal. The requirements for immunoreagents limiting factors of the assay were established. Numerical simulation confirms the results of the proposed analytical model.
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S1369703X20303181
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protein refolding is a major rate limiting step in the large scale production of antibody fragments expressed using a microbial source like
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Fab refolding follows a three state folding mechanism. No significant variation in free energy change for Fab unfolding at 15 30 C. The intermediate formation is an overall rate limiting step in Fab refolding. Inter domain disulfide bond formation critically depends upon temperature. Designed a kinetic reaction model for scalable Fab refolding.
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S1369703X20303193
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Continuous mashing provides advantages compared to conventional batch wise mashing in terms of space time yield . The majority of fermentable sugars are generated during the so called
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FS content prediction during continuous mashing is crucial for industrial use. FS formation kinetics from batch experiments are combined with the RTD of a CSTR. A novel semi empirical model allows for the determination of FS formation kinetics. FS prediction during continuous mash production was achieved with high precision.
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S1369703X2030320X
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Paper mill sludge a lignocellulosic waste from paper industry is an ecological burden of environmental concern . Present study explored PMS as substrate for prodigiosin production in solid state fermentation and concurrent source of cellulose for Cellulose nanocrystals preparation using
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Paper mill sludge PMS was two way valorized through bacterial biotransformation. PMS could be utilized for the improved production of prodigiosin biopigment. Delignification of PMS was achieved concurrent to prodigiosin production. Residual sludge was used to prepare cellulose nanocrystals with desired properties. Both prodigiosin and cellulose nanocrystals were found to be non toxic.
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S1369703X20303211
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In addition to research on the chemical properties of natural aroma compounds that cause the perception of flavour and aroma several studies have reported their potential applications for human health due to their antioxidant anti inflammatory anti cancer and anti obesity properties . Furthermore consumer demand shows a tendency towards natural products most research in the industry and academic fields has focused on the bio generation of commercially relevant NACs particularly microbial production via
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Natural aroma compounds have potential applications for human health and wellness. Biocatalysis is a sustainable technology for the synthesis of natural aroma compounds. The synthesis of natural aromas in non conventional media is a promising field. Solid gas biocatalysis offers technological environmental and economic advantages. Solid gas biocatalysis presents engineering challenges at enzyme and bioreactor levels.
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S1369703X20303223
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Geranyl diphosphate is a direct precursor in the biosynthesis of monoterpenes . Previous studies focused on the manipulation of metabolic flux to improve GPP supply in yeast . However if the subcellular distribution of GPP with monoterpene synthase is not coordinated the usage of GPP becomes sub optimal . Therefore taking sabinene production in
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Revealed the existence of GPP pools in yeast peroxisomes and mitochondria. Engineered subcellular compartmentalization to promote sabinene production. Uncovered novel mitochondrial targets enhanced the compartmentalized pathways.
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S1369703X20303235
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In the commented paper Vahidi et al . developed a mathematical model of blood glucose dynamics in type II diabetes mellitus by using a compartmental physiological model proposed for a healthy human body . Although we recognize their manuscript as an outstanding contribution in this comment we discuss some points of the article whose variations concerning the original model are not justified by the authors . Finally for the sake of promoting the practical use of the mathematical model provided by the authors we carefully enclosed a list of mismatches that must be consider for a proper model simulation .
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Comments on the mathematical model of Vahidi et al. 2011 are presented. A list of points that must be consider for proper model simulation are presented. Non justified variations of the Sorensen model equations are discussed.
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S1369703X20303247
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The present article explores the idea of exposing an enzyme substrate complex to an induced magnetic field aiming at biogas production . Sugar beet pulp was used as a substrate and pectinase as an enzyme . Fermentation experiments were carried out in an 11L working volume stainless steel bioreactor . Additionally the influence of substrate sonication prior to the enzymatic pretreatment on the methane production and specific energy gain was investigated . The enzyme substrate mixture when exposed to an induced magnetic field increased methane production from SBP up to 62 and when sonication was added to the process the increase in methane production was up to 79 . The results indicate that exposing an enzyme substrate mixture to an induced magnetic field can increase biogas production and its methane content with a higher specific energy gain than when sonication was added to the process .
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Fermentation experiments were carried out in an 11L working volume bioreactor. Enzymatic magnetic and ultrasound pretreatment were tested in combination. The magnetized enzyme substrate mixture increased methane production up to 62 . Sonication before mixture magnetization increased methane production up to 79 . The magnetized enzyme substrate mixture exhibits the higher specific energy gain.
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S1369703X20303259
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Membrane aerated biofilm reactors are energy efficient wastewater treatment technologies that utilize gas permeable membranes for aeration and biofilm attachment . In this study a rotating flat sheet MABR was developed as a novel experimental facility to control the local flow velocities by considering the distance from the rotational center in addition to the rotational speed . The MABRs were acclimated under different flow velocities to examine their impacts on the overall performance and the microbial community . The COD removal rates increased with the flow velocity when the latter was less than approximately 1 cm s and then plateaued 3035 gm
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A novel rotating MABR for examining the effect of the flow velocity was developed. The COD removal was almost constant at 0.77 cm s of the aclimated flow velocities. Lower flow velocities 1 cm s can be a dominant limiting factor for the removal. The biofilm was classified into aerobic compact and anaerobic ragged layers. The flow conditions mainly affected the ratio of aerobic and anaerobic bacteria.
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S1369703X20303260
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A label free electrochemical biosensor was developed for the rapid detection of the matrix metalloproteinase 9 biomarker on the basis of antibody immobilizing on the zinc oxide nanoparticle and ZnO nanorod electrodes . The charge transfer resistance R
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Label free electrochemical biosensor was developed for rapid detection of MMP 9. The ZnO nanorod based biosensor exhibited linear behavior in MMP 9 concentration range. The performance was comparable to those of commercial ELISA for real serum samples. It is a viable alternative to the current methods with a much shorter detection time.
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S1369703X20303338
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Microbial fuel cells are innovative bioelectrochemical approaches for natural conversion of waste resources into energy based on the metabolic activities of inoculated bacteria which served as biocatalysts . From all the MFC components the anode electrode plays a vital role in energy generation and pollutant removal . Thus it is in direct contact with bacteria and is responsible for the rate of electron transfer from the electroactive bacteria to the anodes surface . Currently the material and cost of the anode electrode are emerging challenges in MFC research . This review summarizes some potential natural materials and modification strategies for the construction of anode electrodes to decrease the cost and enhance the performance of MFCs .
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Microbial fuel cells MFCs are innovative bioelectrochemical approaches. The material and cost of the anode electrode are challenging issues in MFCs. MFCs are still unfeasible for commercialization. The use of natural materials to build anode electrodes for MFCs is promising.
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S1369703X2030334X
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In this work a novel and simple aptasensor based on the light addressable potentiometric sensor for Alpha fetoprotein detection was proposed . Due to the light addressable capability and potentiometric stability of LAPS the concentration of AFP can be determined by monitoring the potential shifts of LAPS which was caused by specific reaction between AFP aptamer and AFP . The AFP aptamer and gold nanoparticles were modified on the surface of LAPS chip to fabricate the biological sensing element of LAPS system . The AFP aptamer was used as molecules probe to recognize and capture AFP . Au NPs deposited on the LAPS surface could enlarge the surface area for the AFP aptamer immobilization and provide more sites for AFP aptamer to bind effectively with the target AFP and form more aptamer antigen complex . Under optimal conditions the potential shifts of the LAPS detection system were proportional to the AFP concentration in a wide linear range from 0.1100 g mL . The regression equation is Y 2.5892X 103.42778 with a correlation coefficient of 0.9959 and a detection limit of 92.0
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A simple AFP aptasensor based on LAPS was developed successfully. AFP aptasensor showed good linearity from 0.1100g mL with LOD of 92.0ng mL. The aptasensor showed good specificity acceptable stability and simple operability. Spiked human serum samples were evaluated with AFP recovery rate of 95.92 125.54 .
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S1369703X20303351
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mediated 15 hydroxylation of D ethylgonendione is a key step for industrial production of gestodene . However the process efficiency is limited due to the poor solubility of the steroid in aqueous water system . Deep eutectic solvents are promising solvents applied widely in biocatalysis . Here we systematically investigated the biotransformation performance of
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DESs could improve the biotransformation efficiency of 15 hydroxylation of D ethylgonendione. DESs with different HBD exhibited different effects on the biotransformation. Synthetic effects of DESs on steroid hydroxylation was also observed. ChCl Gly is the most potential in steroid hydroxylation mediated by
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S1369703X20303375
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Type 2 diabetes mellitus is a widespread chronic disease with a high prevalence of comorbidity and mortality . The exponential increase of TD2M represents an important public health challenge and leads a strong demand for the development of relevant
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Pancreas liver organ on chip model was developed using rat islets and hepatocytes. The model was characterized by comparison with islets and hepatocytes monocultures. Liver monoculture without insulin impaired cytochrome P3A2 and albumin activities. Insulin secreted by islets restored liver functions in the coculture model.
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S1369703X20303387
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The slow start up of anammox process has been a big obstacle for its engineering application . In this study a new strategy was adopted to start up anammox by mixing perchlorate reduction sludge and anammox sludge with 50 1vol ratio and the mechanism in the start up process was explored . The results showed that anammox process was started up successfully after 41 days . During the operation process pH value increased from 7.880.148.060.11 extracellular polysaccharides increased from 10.56 to 24.45mg
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Perchlorate reducing sludge PRS was first used for anammox start up. The anammox successfully started up in 41 days by PRS and anammox sludge 50 1 . The rapid start up was due to the contribution of PRS and the guide of the anammox. C6 HSL could promote anammox activity while C8 HSL was the opposite. Phylum. played an critical role during the start up of anammox process.
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S1369703X20303399
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For microalgae flocculation the main drawback is high time consumption caused by low flocs settling velocity thus enhancing the sedimentation performance is an urgent problem in need of a solution . To enhance the settling velocity of microalgae flocs montmorillonite clay was applied to microalgae flocculation in the form of flocculant carrier in this study . With clay the effective density of microalgae flocs was enhanced remarkably . When the dry weight ratio of clay to cationic starch was 2 the effective density of microalgae flocs was 3.15 fold of that without clay . As a result the settling velocity of microalgae flocs was enhanced 2.34 times . Additionally owing to the tear effect of clay and well distribution of cationic starch the mean diameter of generated flocs was slightly reduced and microalgae harvesting efficiency was improved . All these results suggested that the montmorillonite clay promises to be an ideal candidate for microalgae flocculation that can both enhance the microalgae sedimentation and adsorption performance .
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Clay was proposed to enhance sedimentation performance of microalgae flocs. Floc effective density and settling velocity were improved 3.15 and 2.34 times. Floc diameter was decreased due to the difference in shear and centrifugal forces. Adsorption efficiency was also improved owing to the tear effect of clay.
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S1369703X20303429
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Nitrifying biomass immobilized in a gel has been applied in wastewater treatment as immobilization results in a high bacterial cell density in the reactor and facilitates easy solidliquid separation in the settling tank . Herein the diffusivity reaction rate and concentration profile of oxygen in a spherical gel entrapping ammonia oxidizing bacteria were investigated . Calcium alginate gel and 2 2 bisphenyl propane gel were used as models to prepare millimeter sized spherical gels . A novel method involving controlled oxygen transfer into out of the spherical gel with alternative flow of air and N
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Spherical gels entrapping ammonia oxidizing bacteria AOB are investigated. Diffusivity reaction rate and concentration profile of O. in the gel are studied. transfer into out of spherical gel is controlled with alternate air and N. flow. concentration in the spherical gel center is measured using O. microsensor. Ammonia oxidation in AOB entrapping gel is also monitored.
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S1369703X20303430
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This study aims to improve the efficiency of 4 androstene 317 dione production from high concentrated phytosterols through a combined strategy of metabolic pathway regulation and two step bioprocess . Firstly we overexpressed cholesterol oxidase and steroid C27 monooxygenase to strengthen the metabolic flux to AD and then enhanced the expression of 17 hydroxysteroid dehydrogenase to reduce the by product 20 hydroxy methylpregna 4 ene 3 one . As a result the AD production was enhanced from 2.4 to 4.5g L with an increase of 88.6 . Afterward a two step bioprocess cell culture at 30C and bioconversion with resting cells at 37C was adopted to avoid the cell growth inhibition and decrease the steroid nucleus degradation . Finally 25.8g L AD was produced from 50g L phytosterols which is significantly higher than that from the fermentation bioprocess and is the highest reported AD production . Therefore this work hopes to pave the way for the commercial production of AD through
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The sterol catabolic pathway was regulated to enhance AD production. A two step bioprocess was adopted to avoid the cell growth inhibition and decrease the steroid nucleus degradation. A combined strategy was developed successfully for improved AD production. The titer of 25.8g L AD and the molar yield of 78.1 was achieved.
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S1369703X20303454
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In the biopharmaceutical industry the selection of high quality cell lines characterized by high productivity and stability over time plays a critical role for the development of processes meeting the desired quality and manufacturability criteria . Cell line selection involves their testing through subsequent stages at different process scales to progressively recreate the conditions of an industrial scale bioreactor from static micro well plates to shake flasks to reactors of increasing volumes and complexity . In this context both scale up and scale down are challenging due to the variety and quantity of data to mine and the scarcity of first principles understanding on cells culture dynamics .
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General framework to accelerate the development cycle of biopharmaceuticals. Pattern recognition and machine learning to aid process scale up. Multiway principal components analysis to identify the most productive and stable cell lines. Procrustes analysis to assess similarity across scales. Joint Y projection to latent structures to predict cell lines performance across scales.
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S1369703X20303466
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Myo inositol is widely used in drug food and animal feed industries . In this study the myo inositol biosynthetic pathway was established in
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A biosynthetic pathway of myo inositol was constructed in. The initial glucose concentration had an obvious effect on the inositol production. Higher glucose concentration did not favor the plasmid stability. The production profile of myo inositol was investigated in a 1L shake flask.
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S1369703X20303478
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Processes efficiency for second generation ethanol production depends mainly on the type of lignocellulosic raw material . Therefore the optimization for each step involved in olive tree pruning biomass valorization was studied alkaline pretreatment of the original feedstock diluted acid hydrolysis of pretreated solids and fermentation of the hemicellulosic hydrolyzates for ethanol production by
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Optimized mild alkaline pretreatment for olive tree pruning biomass deacetylation. Exploring biomass thermochemical depolymerization conditions for ideal hydrolyzates. Fermentation parameters study and predictions focused on bioethanol production. Scale up of. fermentation process in bench fed bioreactor.
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S1369703X2030348X
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Among possible drug delivery system strategies the prodrug based self assembly DDS has been paid much attention in terms of high loading and controlled release . In the application of SADDS the properties and structures of self assembly by prodrug molecules usually play important roles in their bioactivity . However existing strategies to prepare various structures through prodrug molecular design seem to be insufficient . In this study we investigated pH responsive prodrug based SADDSs as an alternate strategy focusing on controlling self assembly behavior via pH change and molecular structural design . The prodrug structure design was inspired by self assembling fatty acids . Here the aryl carboxylic acid Oxaprozin a primary non steroidal anti inflammatory agent was selected as a model molecule to design Oxa lipid prodrug molecules possessing carboxyl groups and different hydrocarbon chain lengths . This prodrug design strategy achieved control of the drug self assembly behavior changing from micelle to fiber to solid which was responsive to pH conditions and molecular concentration . Thus our proposed study may contribute to the development of a biological environment sensitive SADDS .
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pH responsive self assembly behavior of Oxa lipids was observed by designing fatty acid like Oxaprozin prodrug. Different self assemble structures can be formed by Oxa C6 and Oxa C8 under various biological pH conditions. Oxa lipids showed enhanced fluorescence intensity after aggregated to fiber structure.
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S1369703X20303508
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Cinnamyl acetate is an important flavor compound and widely used in cosmetics and food industries . Therefore it is an attractive engineering target . In this study we reported for the first time the development of an artificial cinnamyl acetate biosynthetic pathway in
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Production of cinnamyl acetate from. phenylalanine. Production cinnamyl acetate from glucose through strengthening the. phenylalanine pathway. Improving cinnamyl acetate biosynthesis by overexpressing YjgB YdiB and AroK.
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S1369703X20303533
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Cell line instability can pose a challenge from both regulatory and business needs perspectives . The regulatory guidelines of International Conference on Harmonization require manufacturers to evaluate the cell substrate with respect to the consistent production of the intended product and perform tests of stability during cell cultivation . In an effort to develop strategies for stabilizing cell lines we applied RNA seq based transcriptomics and NMR and LCMS based metabolomics to analyze an industrial monoclonal antibody producing Chinese hamster ovary cell line that was genetically unstable . The cells adapted well to environmental and nutritional changes during passaging and maintained robust cell growth however the omics data demonstrated that lysosome pathway redox balancing and lipid peroxidation and beta oxidation were enhanced in aged cells . The genes involved in lysosome pathway activation up regulated cellular recycling and scavenging activities and reactive oxidative species production . While the genes associated with DNA damage were up regulated and cell cycle was correspondingly inhibited surprisingly those related to DNA repair machinery were down regulated over time . This previously unrecognized disconnect between DNA damage recognition and the needed DNA repair highlights potential directions to stabilize cell lines by formulating inoculum media with increased antioxidant capacity or by maintaining a robust DNA repair system in CHO cells . Both directions require further study .
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Transcriptomics and metabolomics were analyzed on an unstable industrial cell line. Survival mechanism maintained robust cell growth. Lysosomal pathway redox balancing and lipid oxidation were enhanced over time. DNA damage recognition and repair were disconnected in the aged cells.
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S1369703X20303545
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Microbial Electrolysis Cells are often documented for their ability to produce hydrogen through new sources and new configurations . However few studies attempt to document the recovery of the bioanode after being exposed to operational failure conditions . This study attempted to compare the behavior and recovery of MECs after being exposed to four operational failure conditions acidification aeration osmotic shock and voltage reversal . For each failure condition three time points were tested before failure immediately after failure and after recovery efforts . Of the modes tested acidification caused the largest loss in performance and operational efficiency while osmotic shock caused the second largest loss in performance . Aeration and voltage reversal caused negligible losses in performance immediately after failure conditions and after the recovery period . Aeration and voltage reversal had a minimal effect on the removal of individual compounds . However acetate accumulated after acidification and propionic acid accumulated after osmotic shock . These findings could be useful for determining if failure will require more significant repair efforts in commercially deployed devices . While acidification created permanent losses to performance if device failures like aeration osmotic shock and voltage reversal are caught early full recovery without bioanode replacement is likely .
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Microbial Electrolysis Cells were exposed to four anode failure conditions. Performance shortly after exposure and after recovery efforts were documented. Acidification caused irreversible damage to reactor performance. Osmotic shock caused losses in performance but was fully reversible. Aeration and voltage reversal caused negligible losses to performance.
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S1369703X20303570
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Bioprocesses are often carried out in stirred tank bioreactors . Due to the need of mixing homogenization and interphase transports cultures are usually agitated by mechanical hydraulic or pneumatic means . The increasing in agitation decreases mixing time improves homogeneity mass and heat transfer rates and accordingly the metabolism and the biochemical reaction rates are also influenced . The power input into the system is essentially required in order to increase the mass transfer rate the oxygen transport rate in aerobic bioprocesses but also the shear forces are increased and consequently the concentration of some compounds in the liquid phase with the corresponding effects on the cellular metabolism and the cellular structures due to fluid dynamics into the bioreactor . Hydrodynamic conditions in STBR are given by the broth characteristic the vessel geometry including the stirrer and sparger design and the agitation and gas flow rate . Thus shear effects would take place affecting the culture performance provoking cell damage in some occasions . The primary goal of this work is to describe up to date knowledge on these concepts fluid dynamic conditions hydrodynamic stress and oxygen availability influence affecting the microbial processes performance .
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The effect of hydrodynamics on growth rate and oxygen uptake rate is described. Hydrodynamic conditions can provoke changes on morphology and cellular viability. Shear effects in STBR have an important influence on microbial cultures performance. Oxygen availability on aerobic bioprocesses can affect the metabolite distribution.
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S1385894719305558
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Electrodeposition based on 3D scaffold templates is a unique and facile method to tune the microstructure of composite electrode materials for energy storage devices . In this work we developed a green process to fabricate 3D hierarchical porous carbon scaffold MnO
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Fabricating. nanohybrids with colony like microstructures and rich heteroatom dopants. Acting as templates the graphitic edges of 3D HPCS enable structural control of MnO. electrodeposits. Quantitatively proved mesopores contributes more than micropores in increasing capacitance of HPCS. Both surface capacitive and diffusion controlled processes play roles in capacitive performance of. The assembled device exhibits an energy density of 61.8Whkg. and a maximum power density of 22.6kWkg
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S1385894719326555
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Excessive proliferation of cyanobacteria blooms resulting in metabolic musty earthy odor materials such as geosmin pose potential risks to aquatic ecosystems and human health . In this paper a high yield
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OH equipment was developed to install in drinking water system of 12000m. day. OH degraded GSM in the process of algae colonies inactivation within 20s. OH inactivated algae colonies to individual intact ones without IOM release. OH mineralized GSM through the crucial ring opening reactions. All water quality and DBP indexes satisfied the limits of Chinese Standards.
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S1385894719326828
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Micro fine particles or micro fine powdered zeolite were deposited on hydrophobic polyvinylidene fluoride membrane to enhance gravity driven ultrafiltration performances . A distinct flux attenuation and permeate quality difference were observed between pristine and deposited membrne systems . The results indicated that both MFPAC PVDF and MFPZ PVDF membranes exhibited a high pure fluxes a gentle flux downward trend and a high stable permeate flux compared to the pristine PVDF membrane . Additional compared to the pristine membrane the deposited membrane systems exhibited a significantly enhanced removal of TOC NH
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The deposited layers improved the removal of contaminants and membrane permeability. The micro fine particles enhanced the hydrophilicity of membrane surfaces. The micro fine particles decreased adhesion free energy between membrane surfaces and foulants. The micro fine particles influenced on the biofilm structures.
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S1385894719328384
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The depletion of fossil chemicals and energy sources led to develop processes allowing the conversion of renewable feedstocks into useful products . Bioethanol production is a typical case of biomass conversion into chemical species with attractive uses such as fuel fuel additives or chemical intermediates .
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Highly selective photooxidation of ethanol to acetaldehyde and acetic acid in water. Effect of starting Cu concentration on acetaldehyde production. Easy. photocatalyst regeneration through zerovalent copper reoxidation. Careful flammability analysis of the ternary gaseous mixtures after Cu reoxidation. Feasible process flow sheet for large scale implementations.
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S1385894719328852
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Chemoselective hydrodeoxygenation of lipids to diesel like hydrocarbons is important for biomass to biofuel conversion . Here we design a new Ni based catalyst Ni MoO
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Partial oxidation of Mo. CT. MXene is used as a novel support for Ni based catalyst. The Ni MoO. @Mo. CT. catalyst shows enhanced activity and selectivity ratio of C. C. The major product of palmitic acid HDO is C. demonstrating a high C atom economy. The improved performance is ascribed to the synergic effect of metal Ni Mo. CT. and MoO
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S1385894719328876
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In a Taiwanese chemical processing plant producing ethylbenzene an unexpected thermal runaway reaction occurred in an alkylation tower during shutdown causing approximately 7500kg of catalyst to be wasted . Prior risk assessments failed to identify the responsible hazard vectors . The thermal runaway occurred despite all former appropriate operating procedures being strictly followed . To identify the root cause of this incident the generation and dissemination of the thermal source were tested and simulated using thermal analysis methods and a prototype tower . The results showed that water adsorption could provide heat to the catalyst bed even at temperatures exceeding 350C which is the temperature required for the oxidation of hydrocarbon adsorbates . High humidity caused by Typhoon Lionrock was a critical factor contributing to the incident which was not anticipated by the plant engineers . Humidity within the air inlet supplied the abundant adsorption heat required to increase the bed temperature . This resulted in thermal runaway due to heavy oxidation of the large number of adsorbates . This study proposes a safer strategy that involves passing humid N
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Thermal runaway in an alkylation tower during shutdown was first explored. Weather conditions indirectly compromised operational safety processes. Heat generation and source were evaluated and summarised. Risk assessment methods were reconsidered. This study contributes to loss prevention in catalytic processes.
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S1385894719328888
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Advances in nanotechnology and nanomaterials have led to the development of nanostructured membranes . Zinc oxide a multifunctional nanomaterial has been postulated as a filler in polymeric and ceramic membranes to improve properties such as roughness permeability and fouling resistance . This review is a comprehensive overview of recent progress on the following i ZnO nanostructure preparation and characterization ii ZnO growth techniques iii fabrication of ZnO based polymeric and ceramic membranes and iv environmental application studies in water and wastewater technologies using ZnO embedded polymeric and ceramic membranes . The review also covers approaches to control membrane properties to reduce fouling and biofouling increase the solvent flux increase pollutant rejection and control swelling and deswelling membrane properties . Finally the main expected applications on membrane driven processes for environmental applications of water treatment are also analysed .
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ZnO has been postulated as a filler in polymeric and ceramic membranes. Recent progress on ZnO nanostructure preparation and characterization is reported. Environmental applications using ZnO embedded polymeric ceramic membranes are included. Approaches to control membrane properties to reduce fouling and biofouling are also covered.
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S138589471932889X
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Thermally conductive composites have attracted much attention due to their application in the thermal management of electronics . But most of the thermally conductive composites exhibit poor filler dispersion and weak filler polymer interfacial interaction which would deteriorate the mechanical properties and impede the enhancement of thermal conductivity . Herein three new copolymers were synthesized through hydrosilylation reaction of poly with methyl methacrylate glycidyl methacrylate and 3 propyl methacrylate respectively . The copolymers were used to enhance the thermal conductivity and mechanical properties of Al
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Three new grafted copolymers were synthesized by hydrosilylation reaction. After modification by PDMS PHMS MPS the thermal conductivity increased. After modification by PDMS PHMS MPS the mechanical properties were improved. PDMS PHMS MPS Al. SR composite exhibited outstanding thermal management capability.
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S1385894719328918
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Remote control of microfluidic locomotion by external stimuli is attracting extensive attention due to its practical applications in various areas such as chemical reactors gas sensors and transporters . Within this report we describe an effective method of preparing liquid marbles stabilized by super hydrophobic luminescent carbon dots and demonstrate their outstanding photothermics fluorescence and diamagnetism . The super hydrophobic CDs were synthesized by surface functionalization using polyhedral oligomeric silsesquioxane and manipulation of the LMs was achieved using light electricity and magnetism . LMs could act as ideal models of collision triggered miniature reactors for enhanced chemical reactions with fast mixing of microfluidics leading to substantial improvement in reaction rate and selectivity . For the first time the use of collisions triggered by multi external stimuli has been demonstrated showing an intensification to the micromixing process and therefore an enhancement to the microreactions . We expect that these LMs can be applicable in microfluidics miniaturized reactors and many other associated industries .
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A new class of liquid marbles using luminescent carbon dots are made for chemical reactions. Remote control of liquid marbles using external stimuli is realized. Liquid marbles exhibit excellent photothermics fluorescence and diamagnetism. Collisions of liquid marbles triggered by external stimuli intensify chemical reactions massively. Ultra high selectivity and fast reaction can be realized simultaneously by using our liquid marbles.
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S138589471932892X
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Recently developing insoluble cross linkable functional layers plays a vital role for solution processed organic light emitting diodes . Here two vinyl based cross linkable hole transporting materials V TPAVTPD and V TPAVCBP are designed and synthesized . Additionally cationic photoinitiator 4 octyloxydiphenyliodonium hexafluoroantimonate is first introduced to chemically induce vinyl based photo cross linking process aiming at lowering cross linking temperature and enhancing hole mobility . As a result cross linking can occur at expressly low temperature of 120C with 95 solvent resistance . Moreover hole mobility is markedly enhanced with the value higher than 10
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Two vinyl based cross linkable hole transporting materials are synthesized. Cross linking temperature is markedly lowered by doping photoinitiator. Hole mobility is also enhanced by doping photoinitiator. The highest external quantum efficiencies are 15.5 green and 15.0 red .
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S1385894719328931
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Here we describe the development and testing of a hybrid system that combines microbial electrolysis and reverse electrodialysis to benefit energy production from seawater . A tubular continuous flow microbial electrolysis cell was used prior to RED to remove multivalent ions Ca
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An MEC was integrated into RED for energy producing seawater pretreatment. A hybrid MEC RED process harvested energy in the forms of hydrogen and electricity. A tubular continuous MEC removed Ca. and Mg. with efficiencies of 84 and 99 . 26 more power was produced with pretreated seawater compared to untreated seawater.
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S1385894719328943
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In this paper a naturally occurring ilmenite ore and the same ore modified with NiO were employed as oxygen carriers for chemical looping reforming of CH
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A dual function catalyst modified oxygen carrier of ilmenite ore was prepared. The addition of NiO to ilmenite enables syngas generation through both CLR and DMR. The incorporation of CLR and DMR provides an opportunity for CO. utilization.
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S1385894719328955
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Developing a cost effective and bulk scale process for graphene synthesis is essential for its commercialization in a wide range of industrial applications . In this study for the first time we used a CouetteTaylor fluid structure with axial flow as a green rapid and scalable protocol to synthesize reduced graphene oxide flakes . We have determined five different flow characteristics in the laminar transitional and turbulent regimes and systematically investigated the effect of flow structure on RGO production . The toroidal vortices ensure the reactants are efficiently mixed shortening the reduction time of graphene oxide from several hours to minutes . The results showed that the degree of RGO reduction significantly increased in the Taylor vortex flow structure and decreased in the wavy vortex flow regime because of the secondary instability of the fluid structure . More importantly the TVF regime results in the synthesis of highly exfoliated and readily water dispersible RGO products . Finally the resulting RGO exhibited higher electrical conductivity and mechanical strength than conventional RGO synthesized under circular Couette flow . Thus the proposed fluid dynamic protocol may open an effective potentially cost competitive and industrially accessible pathway for producing few layered RGO flakes for various applications .
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A green fast and bulk scale process for the production of RGO was developed. Efficient mixing of GO and reductant was achieved via TVF which remarkably shorten the reduction time. The RGO exhibits high water dispersibility and excellent electrical and mechanical properties.
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S1385894719328980
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Hydrogen isotope separation under moderate conditions with high selectivity remains a huge challenge due to the identical physicochemical properties of the isotopes . Here we present zeolite materials with an excellent thermal stability and highly selective for hydrogen isotope separation through dihydrogen bond on ion exchanged Cu centers . Thermal desorption spectroscopy measurements show that hydrogen isotope separation and enrichment can be carried out in a technologically favorable temperature range from liquid nitrogen temperature to near room temperature and a D
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Strong chemical affinity between H. D. and Cu I exchanged zeolite is observed. S D. H. is 24.9 for the Cu I ZSM 5 zeolite at 100K. S T. D. and S T. H. are predicted by DFT calculations from 77 to 298K. Hydrogen isotope separation mechanism is discussed.
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S1385894719328992
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Developing materials with excellent adsorption performance and evaluating their feasibility for practical use are highly demanded for radioactive strontium removal from natural water . Herein a novel K Zn Sn S metal sulfide nanosheet is prepared using a hydrothermal method . The powdered KZTS NS consists of Lewis basic Zn Sn S layers and exchangeable K
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A novel and environment friendly metal sulfide nanoadsorbent was prepared. The adsorbent showed highly efficient Sr. adsorption via ion exchange with K. A new application of the powdered adsorbent was explored in actual tap water. The CTA F MF process achieved a decontamination factor of Sr. as high as 1405. The effect of competing ions was significantly reduced in the CTA F MF process.
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S1385894719329031
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As the global population increases the environmental burden from industrial and transportation related pollution will continue to rise . Photocatalysis has been presented as a promising method of removing several environmental pollutants from the atmosphere . Within the literature there are a wide variety of approaches that have been adopted to immobilize or secure the photocatalyst onto support material . A critical review of each of the major methods of photocatalyst immobilization as well as their application to air pollution remediation is presented . Immobilization methods can include sol gel solvent deposition electrophoresis thermal spraying and chemical and physical vapour deposition . Literature presented on these methods provides a wide range of photocatalytic efficiencies for the removal of NO
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Composite photocatalyst systems show the most promise for pollution remediation. SPS and CGS techniques show the most promise for photocatalyst immobilization. Films deposited by sol gel and TS techniques showed the highest removal rates. General unawareness of the published ISO standards.
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S1385894719329043
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In this paper acid treated seeds have been adopted to improve the yield of UZM 9 zeolite which could reach 50 for the first time within only two days . When applied as NH
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The yield of UZM 9 could improve to 50 within two days by adding acid treatment seeds. Wide temperature window of Cu Mn based catalysts 200650C . The introduction of Mn species could improve the low temperature activity. The introduction of Mn species could restrain the generation of N. O.
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S1385894719329067
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A key requirement for materials that adsorb pollutants in aqueous media is the balance between efficiency and biodegradation owing to rising microplastic pollution . Hyperbranched polyamidoamine based microhydrogel particles from ethylene diamine monomer demonstrate high absorbance activity for removing heavy metal ions yet are vulnerable to hydrolysis . Here we copolymerize lysine diketopiperazine and EDA with
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Polyamidoamine microparticles containing lysine cyclodipeptide L DKP are prepared. Cu. absorption capacity and hydrolysis rate decrease with an increase of L DKP units. Microparticles without L DKP have the highest Cu. absorption but degradation leads to re pollution. Microparticles containing 20mol of L DKP D2 exhibit the best balance of efficiency stability. D2 without disturbing the hydrogen bond leads to a higher Cu. absorption yet stable in water.
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S1385894719329079
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In this work a novel fixed bed reactor configuration is proposed and tested for the steam reforming of methane the proposed solution consists of filling the voids of highly conductive metallic open cell foams with small catalytic pellets . This reactor layout aims at enhancing the radial heat transfer of the tubular reactor by exploiting the thermal conductivity of the solid interconnected matrix while keeping a target catalyst inventory and avoiding issues related to washcoating of metallic structures .
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Packed foams successfully applied to SMR process. Systematic increase of productivity noted at fixed oven temperature. Foam conductivity enhances heat transfer properties. Development of a heat transfer model for packed foams.
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S1385894719329080
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In this study the performance of the peroxi coagulation fuel cell process for p arsanilic acid removal and power generation were evaluated at initial pH of 3.06.0 . It was found that 94 of p ASA could be removed within 60min at pH of 3.06.0 . The fastest p ASA removal could be obtained at pH of 4.0 whereas the optimum power density was 98.3mWm
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The PCFC system was the combination of peroxidation and electrocoagulation processes. Efficient p ASA removal was obtained in PCFC system with simultaneous electricity generation. The optimum power density was 98.3mWm. at 745mAm. with pH of 3.0. The optimum removal of p ASA was achieved at pH of 4.0 within 15min.
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S1385894719329092
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Developing bioinspired artificial Z scheme heterojunction photocatalysts with exceedingly well performance of visible light harnessing along with optimum band edge potentials is a robustly prominent avenue to combat the environmental and energy crisis . The current scenario in fixation of water shortages all over the world is utilisation of green and economical processes to maintain sustainability . In this regard hybridizing fascinating metal free polymeric conjugated graphitic carbon nitride g C
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Exploration of basic principle of Z scheme photocatalysis. Selection of Z scheme photocatalysts for photocatalytic environment applications. Discussion on g C. based Z scheme photocatalysts for pollutant degradation. Applicability of Z scheme photocatalysts for photocatalytic antibacterial activity. View point on scope and limitations in g C. based Z scheme photocatalysis.
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S1385894719329109
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Production of dinitrodiazophenol generates a large amount of industrial wastewater that is biotoxic and difficult to treat using traditional methods . In this study a persulfate treatment process activated by Fe
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A microwave assisted zero valent iron persulfate treatment process was studied. The MW Fe. PS process treated DDNP wastewater effectively COD removal of 69.52 . SO. and. OH existed in the MW Fe. PS process and SO. played a major role. Fe. maintained high reactivity after repeated use in MW PS environments.
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S1385894719329146
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Treatment and disposal of sewage sludge constitute one of the major problems of wastewater treatment plants due to high water content and more stringent environmental regulations . Supercritical water gasification technology is accepted as a promising method for sustainable sludge disposal because of the elimination of need for costly water reduction and drying processes before disposal by conventional methods . The aim of this study is to determine the effect of temperature solid matter content and catalyst addition on supercritical gasification of sewage sludge in a continuous flow pilot scale tubular reactor . The results indicate that the gasification efficiency is generally temperature dependent . Furthermore catalyst addition improves the gasification efficiency at high solids content . The produced gas contains 60 of H
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The pilot scale continuous flow tubular reactor was designed specially produced. Effects of temperature feed concentration and KOH catalyst were studied. Temperature sludge concentration and KOH had great effect on the system yield. SCWG is a promising and efficient technology for the gasification of wet biomass. Unlike conventional gasification methods no hazardous emissions.
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S138589471932916X
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The most important thing to do with hexavalent chromium removal in wastewater through adsorption reduction method is to find an adsorbent that has both strong adsorbability and reducibility . Herein an eco friendly material ZIF 8 EGCG which was a combination of epicatechin gallate and ZIF 8 was synthesized to treat Cr containing wastewater . At room temperature the maximum adsorption amount of Cr reached 136.96mgg
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ZIF 8 was firstly modified with epicatechin gallate EGCG . Positively charged ZIF 8 became negatively charged upon modification. ZIF 8 EGCG showed greatly improved adsorption and reduction for Cr VI . Adsorption of Cr VI on ZIF 8 EGCG was governed by both physical and chemical processes.
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S1385894719329171
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Anaerobic digestion is a green technology that has been applied for many years . One of the main problems in this process is controlling these bioreactors to maximize methane production . A supervisory control strategy has been proposed to improve the methane production rate in an anaerobic digestion process while minimizing the risk of process failure in the presence of several drastic feedstock changes . The inner loop consisted of a feedback control that manipulated the feed flow rate for achieving the desirable methane production rate . A rule based control strategy was used as supervisory control loop . This controller received the total volatile fatty acids concentration in the reactor and the trends of methane production rate to calculate the set point of the inner control loop . pH was used as a safety control parameter to prevent the system from acidification . The proposed control scheme was tested in the presence of several disturbances in the feedstock including glucose overload ammonia inhibition substrate dilution and shifting feeding from manure to bio pulp . The controller prevented VFA accumulation above 2.73 2.94 and 4.09gL
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An efficient proposed control strategy was used to control an anaerobic digester. Supervisory controller kept the reactor stable against severe external disturbances. The controller improved methane production and minimized risk of process failure. By monitoring the VFA concentration the controller performance was improved.
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S1385894719329183
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Antibiotics especially halogenated antibiotics which account for nearly 40 of the total antibiotics in China pose great environmental risks however the superior stability of CF bond and low concentrations hinder their degradation indicating the need for developing of highly efficient treatment technologies . There is an additional concern that some degradation products could be as active toxic as or even more than their parent compound . The stable CF bond can be relative easily cleaved by UV light irradiation which could come from sunlight . Herein a novel UV driven electro Fenton catalytic membrane filtration system that favors resistance elimination and efficient degradation of low concentration antibiotics is proposed for the first time . The photo electrochemical electro Fenton coupling reaction is synchronously conducted in a sequential filtration system . Almost complete degradation and high mineralization of florfenicol were achieved at a concentration of as low as 14M with the hydraulic retention time of 0.98h during the UV EFCM filtration system . Complete elimination of its antibacterial activity and significant defluorination improvement compared to electro Fenton filtration process were achieved due to the prior cleavage of the stable CF bond with antibiotic potency under UV light pretreatment . This study thus proposes a novel UV EFCM filtration system which couples PEC and EF with a potential to tackle the environmental problems associated with antibiotic pollution .
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A novel UV EFCM filtration system was developed. Low concentration antibiotic contaminant was efficiently degraded. The antibacterial activity was thoroughly eliminated with UV light pretreatment. Specific energy consumption of the integrated system was significantly reduced. Integrated system has the potential to tackle the problem of antibiotic pollution.
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S1385894719329201
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Dinuclear Ir complexes are drawing increasing attentions due to their impressive luminescent properties . In this work we report a promising molecular framework for developing novel charge neutral dinuclear Ir complexes . Unlike most of dinuclear Ir complexes reported previously the two Ir centers are held by a cyclometalated bridging ligand which can form a rigid structure to suppress the nonradiative decay . The resultant dinuclear Ir complexes are highly emissive in both solution and doped film with photoluminescent quantum yields up to 0.78 . Two functional flanking ligands are used to further tune the luminescent properties . Compared with that of corresponding conventional mononuclear Ir complex the emission of dinuclear Ir complexes can be greatly red shifted by over 110nm . Theoretical calculations are performed to understand these impressive photophysical properties of these dinuclear Ir complexes . Finally solution processed organic light emitting diodes are fabricated to evaluate their electroluminescent properties . The orange red device based on
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Diiridium complex molecular framework is developed for phosphorescent emitters. Solution processed orange red OLED achieves a record EQE of 23.9 . Deep red OLED with a EQE of 18.0 shows CIE coordinates of 0.69 0.30 .
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S1385894719329213
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Bacterial reproduction in fabric has been a threat to human health for centuries . Although several self cleaning fabrics have been tried serious drawbacks such as complex manufacturing high price and low durability seriously limit their applications . Herein a functional composite fabric composed by polyacrylonitrile and polymer carbon nitride was prepared by facile electrospinning and high pressure steam methods . This PAN PCN fabrics not only show filtration capacity as high as that of commercial filters but also exhibits outstanding photocatalytic disinfection performance .
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Polymeric carbon nitride nanosheets were loaded on polyacrylonitrile fabrics. The functional fabrics were efficient for water filtration and disinfection. The fabrics were easy separated from water avoiding photocatalyst residue. The portable fabrics were promising to achieve clean water outdoor.
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S1385894719329249
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The current research work investigated the effective utilization of automobile shredder residue fly ash as an alternative iron source to degrade recalcitrant organic pollutants like tetracycline via a visible light driven photo Fenton like process at neutral pH . The whole photodegradation process was carried out in a fixed mode by using highly durable ASR fly ash beads as the catalyst in the photo Fenton reaction . As confirmed through several characterization techniques these beads contained hematite goethite magnetite pyrite and wustite forms of iron oxides . Moreover iron cations Fe
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ASR fly ash was used as an iron source in photo Fenton degradation of Tetracycline. Spherical ASR fly ash beads were used as recyclable catalyst in fixed bed studies. XRD and Raman spectroscopy confirmed the presence of iron oxides on beads surface. ASR fly ash beads contributed to dual process photocatalysis photo Fenton . The beads were highly stable and active even after 10 recycles.
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S1385894719329262
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A novel and simple strategy for one pot preparation of supramolecular reduced graphene oxide hybrid material based on pillararenes was developed by the redox reaction between graphene oxide and hydrazide pillararene in aqueous solution . In this process no additional reducing agents needed to be added and no extra modification steps were required after reducing GO . The few layer RGO HP5A hybrids fabricated could be dispersed in the water easily and stably . When applied to supercapacitors this nanocomposite showed a remarkable specific capacitance 331 Fg
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Hydrazide pillar 5 arene HP5A served as the reducing agent and stabilizer. RGO HP5A composite exhibited excellent water dispersibility and few layer property. RGO HP5A 2 3 showed a high initial specific capacitance and great rate capability. The composite had many binding sites for further optimization.
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S1385894719329274
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Constructing different 2D nano materials into hybrids is an effective way to fabricate high performance microwave absorbing materials . The formed heterointerfaces offers new loss mechanisms to make up the shortages of sole material in attenuating electromagnetic energy . For practical utilizations microwave absorbers perform at low frequency band with light weight and thinness are more desirable . Here hybrids aerogel microspheres constructed from graphene oxide and Ti
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Synthesized a new kind of Ti. hybrid aerogel microspheres. RL. value of 49.1dB at 1.2mm with loading of 10wt was achieved. The hybrid aerogel exhibited excellent attenuating ability in S band. Multiple attenuation mechanisms enhanced microwave response.
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S1385894719329298
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Mercury emission derived from natural gas exploitation metal sintering coal gasification and combustion gold mining etc . has posed great threaten to the environment and human beings due to its volatility mobility toxicity and bioaccumulation in ecosystem and food chains . Adsorption using carbon materials is regarded as one of the most promising techniques for mercury emission control due to its simple equipment convenient operation high removing efficacy less secondary pollution etc . This review comments the new research progress of elemental mercury capture by novel carbon based sorbents in recent five years particularly emerging carbon materials such as bio chars graphene and graphene oxide carbon nanotubes and nanofibers carbon spheres carbon aerogels metal organic frameworks and graphitic carbon nitrides . The mercury removal performances and reaction mechanisms of diverse carbon based sorbents along with their merits and drawbacks are fully discussed which aims to strengthen the understanding of this emerging research topic and outline future research directions for the development of sustainable recyclable and cost effective carbon based mercury sorbents .
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The prospect and limitation of low dimensional carbon for Hg. removal are commented. Bio char carbon nitride and metal organic framework are promising mercury sorbents. The performances and mechanisms of diverse carbon based sorbents are fully discussed.
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S1385894719329316
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Lithium metal has been regarded as the most promising anode material for next generation lithium batteries due to its high theoretical capacity and low potential . However uncontrolled dendrite growth during cycling has remained a big challenge resulting in poor capacity retention and safety issue . Herein an ultralight hollow 3D carbon skeleton was fabricated from soybean oil through a facile chemical vapor deposition method which was subsequently coated with copper oxide layer to improving Li wettability . Molten Li can be infused into the 3D carbon host rapidly due to the interaction between copper oxide and liquid Li . The in situ formed Cu nanograins highly dispersing on the carbon skeleton play a key role in homogenizing Li nucleation . The hollow 3D structure of carbon skeleton can accommodate the volume variations of the electrode and regulate Li stripping plating behavior thus suppress the dendrite growth and dead Li formation effectively . As a result the Li composite electrode presents high areal capacity and cycle stability in both symmetric cell and Li S cell . This work provides an alternative strategy to develop high loading Li composite anodes .
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An ultralight hollow 3D carbon host was synthesized via using soybean oil as carbon sources. Copper oxide coating greatly improved the Li wettability of 3D carbon based host. The contents of active Li metal in OCCu Li composite electrode is up to 94wt Li content. Li dendrite growth and volume change were effectively suppressed during cycling.
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S1385894719329328
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In this study a single chamber Mg air fuel cell is used to remove phosphorous and to simultaneously recover struvite and electricity from synthetic hydrolyzed urine . The Mg
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An MAFC is constructed to recover P and electricity from hydrolyzed urine. The effluent P concentration is lower than 0.5mgL. after 15 min treatment. More than 99.48 of P in urine is recovered as high purity struvite 98 . The maximum power density of urine powered MAFC reaches 552.32mWm. The struvite precipitation enhances the electricity generation of MAFC.
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S138589471932933X
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This study evaluated biodesulfuruization of sulfate containing wastewater using CO as the only carbon substrate in a gas lift bioreactor . The effect of hydraulic retention time sulfate loading and CO loading rates on sulfate reduction and CO conversion was examined and 72h HRT proved to be best for achieving maximum sulfate reduction and CO utilization . The CO utilization was nearly 80 at the beginning of the reactor operation which reduced later due to increase in the inlet CO concentration in the third phase of bioreactor operation . Artificial neural network based model was successfully described to predict the performance of the system using Levenberg Marquardt algorithm with twelve number of neurons . Steady state experimental values of sulfate reduction obtained using the gas lift bioreactor accurately matched well with the values predicted by the ANN model . Furthermore addition of biologically synthesized iron nanoparticles using green tea extract significantly improved the bioreactor performance towards sulfate rich wastewater treatment with CO particularly under high sulfate loading condition .
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Carbon monoxide fed gas lift reactor is well suited for treating sulfate rich wastewater. High sulfate removal obtained for low influent sulfate and high inlet CO concentrations. Artificial neural network based model successfully predicted bioreactor performance. Iron nanoparticle addition significantly improved the process efficiency.
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