• flocculation of escherichia coli using a quaternary

    Flocculation of Escherichia coli Using a Quaternary

    Escherichia coli (E. coli) was selected as an example of a Gram-negative bacteria for testing the flocculating properties of a quaternary ammonium salt grafted chitosan (carboxymethyl chitosan-graft-poly[(2-methacryloyloxyethyl) trimethylammonium chloride] copolymer; i.e., CMC-g-PDMC). The effect of various flocculation parameters, including

  • flocculation of escherichia coli using a quaternary

    Flocculation of Escherichia coli Using a Quaternary

    Only few studies are available on bacteria removal efficiencies and antibacterial properties of flocculants, which is one of the important requirements in water treatment work. Escherichia coli (E. coli) was selected as an example of a Gram-negative bacteria for testing the flocculating properties of a quaternary ammonium salt grafted chitosan (carboxymethyl chitosan-graft-poly[(2

  • flocculation of escherichia coli using a quaternary

    Flocculation of Escherichia coli Using a Quaternary

    Flocculation of Escherichia coli Using a Quaternary Ammonium Salt Grafted Carboxymethyl Chitosan Flocculant Article in Environmental Science and Technology 48(12) · May 2014 with 161 Reads

  • inducing flocculation of non-floc-forming escherichia coli

    Inducing flocculation of non-floc-forming Escherichia coli

    2018-11-30· The present article reviews several approaches for inducing flocculation of Escherichia coli cells. The common industrially used bacterium E. coli does not naturally have floc-forming ability. However, there are several approaches to induce flocculation of E. coli cells. One is induction by flocculants—polyvalent inorganic salts, synthetic polymeric flocculants, or bio-based polymeric

  • flocculation of escherichia coli cells in association with

    Flocculation of Escherichia coli Cells in Association with

    Microbial flocculation is a phenomenon of aggregation of dispersed bacterial cells in the form of flocs or flakes. In this study, the mechanism of spontaneous flocculation of Escherichia coli cells by overexpression of the bcsB gene was investigated. The flocculation induced by overexpression of bcsB was consistent among the various E. coli strains examined, including the K-12, B, and O

  • inducing flocculation of non-floc-forming escherichia coli

    Inducing flocculation of non-floc-forming Escherichia coli

    The present article reviews several approaches for inducing flocculation of Escherichia coli cells. The common industrially used bacterium E. coli does not naturally have floc-forming ability.

  • inducing flocculation of non-floc-forming escherichia coli

    Inducing flocculation of non-floc-forming Escherichia coli

    2 1 Abstract 2 The present article reviews several approaches for inducing flocculation of Escherichia 3 coli cells. The common industrially used bacterium E. coli does not naturally have 4 floc-forming ability. However, there are several approaches to induce flocculation of E.

  • fabricating an enhanced sterilization chitosan-based

    Fabricating an enhanced sterilization chitosan-based

    However, in the flocculation process of Escherichia coli suspension, the flocculation effect vs. dosage curve of PAMA and CTS-g-PAMA (Fig. 7(b)) entered a platform period after optimum dosage and without re stabilization effect. Therefore, it could be speculated that beside charge neutralization, bridging and netting effect, there was another

  • flocculation ofescherichia coliusing a quaternary

    Flocculation ofEscherichia coliUsing a Quaternary

    Title: Flocculation ofEscherichia coliUsing a Quaternary Ammonium Salt Grafted Carboxymethyl Chitosan Flocculant: Authors: Yang, Zhen; Degorce-Dumas, Jean-Regis; Yang

  • flocculation ofescherichia coliusing a quaternary

    Flocculation ofEscherichia coliUsing a Quaternary

    Title: Flocculation ofEscherichia coliUsing a Quaternary Ammonium Salt Grafted Carboxymethyl Chitosan Flocculant: Authors: Yang, Zhen; Degorce-Dumas, Jean-Regis; Yang

  • dual functionality of a graft starch flocculant

    Dual functionality of a graft starch flocculant

    A dual-function graft starch flocculant (St-g-PDMC) was prepared simply.St-g-PDMC can remove turbidity and inhibit E. coli in water simultaneously.The effect of grafting ratio on the dual functionality of St-g-PDMC was evaluated.Charge attraction plays an important role in the flocculation of two pollutants.

  • flocculation and antibacterial performance of dual

    Flocculation and antibacterial performance of dual

    The present study examined the synergistic effect of alum-modified cassava peel starch as dual coagulants in removing total suspended solids and Escherichia coli in dam water. The optimisation study was carried out to evaluate the effects of pH, coagulant dosage, and settling time on the flocculation performance of the coagulants.

  • flocculation and antimicrobial properties of a cationized

    Flocculation and antimicrobial properties of a cationized

    All of the prepared starch-based flocculants show effective performance for the flocculation of kaolin suspension, two bacterial (Escherichia coli and Staphylococcus aureus) suspensions, and two contaminant mixtures (kaolin and each bacterium) under most pH conditions. St-CTA with a high substitution degree of CTA demonstrates improved contaminant removal efficiency because of the

  • flocculation and antimicrobial properties of a cationized

    Flocculation and antimicrobial properties of a cationized

    Sigma-Aldrich offers abstracts and full-text articles by [Zhouzhou Liu, Mu Huang, Aimin Li, Hu Yang].

  • flocculation of cell debris from ultrasonicated

    Flocculation of cell debris from ultrasonicated

    Cell debris of Escherichia coli produced by ultrasonication was flocculated with acid. The debris settled at pH 3 and 4, but not at pH 2. Extensive protein precipitate formed in lysates at low pH. Th...

  • flocculation and sterilization of bacteria by a cationized

    Flocculation and sterilization of bacteria by a cationized

    All of the prepared starch-based flocculants show effective performance for the flocculation of kaolin suspension, two bacterial (Escherichia coli and Staphylococcus aureus) suspensions and two contaminant mixtures (kaolin and each bacterium) under most pH conditions. St-CTA with a high substitution degree of CTA demonstrates improved

  • selective flocculation with chitosan in e. coli

    SELECTIVE FLOCCULATION WITH CHITOSAN IN E. COLI

    ABSTRACT The effects of ionic strength and multivalent metal ions on the flocculation performance in Escherichia coli cell disintegrates using the polycationic chitosan as a flocculant were investigated.The study showed that ionic strength could be used to optimize the selectivity in flocculation. The best selectivity was obtained at 0.5 M sodium chloride where 95% of the cell debris and 88%

  • evaluation of options for harvest of a recombinant e. coli

    Evaluation of options for harvest of a recombinant E. Coli

    The use of flocculation both to precipitate the DNA and to flocculate the resultant solids (precipitate, debris, etc) results in the removal of submicron particles. From Figures 5 and 6, this appears to be a relatively robust process with good removal of fine particles over a range of concentration ratios of PEI to wcw. The USD prediction for

  • flocculation enhanced centrifugation and microfiltration

    Flocculation Enhanced Centrifugation and Microfiltration

    Further, the performance of the centrifugation and microfiltration of the E. coli lysate, with and without flocculation, has been investigated and compared. The results show that by choosing an appropriate polymeric flocculant and dosage, both of the centrifugation and microfiltration separations could be significantly enhanced.

  • flocculation enhanced centrifugation and microfiltration

    Flocculation Enhanced Centrifugation and Microfiltration

    Further, the performance of the centrifugation and microfiltration of the E. coli lysate, with and without flocculation, has been investigated and compared. The results show that by choosing an appropriate polymeric flocculant and dosage, both of the centrifugation and microfiltration separations could be significantly enhanced.

  • chitosan flocculation: an effective method

    Chitosan flocculation: An effective method

    Immobilization of Escherichia coli cells containing a omega-transaminase was carried out by flocculation with chitosan and the preparation was used in asymmetric synthesis of (S)-4'-cyano-alpha-methylbenzylamine, recycled in five consecutive batches.

  • dual functionality of a graft starch flocculant

    Dual functionality of a graft starch flocculant

    Simultaneous removal of turbidity and inhibition of E. coli in water using a graft starch flocculant. Flocculation and disinfection are two necessarily steps in drinking water treatment. However, rapid industrial development and population growth lead to continued contamination of surface water and groundwater, contributing to serious deterioration of water qualities.

  • the use of laminar tube flow in the study of hydrodynamic

    The use of laminar tube flow in the study of hydrodynamic

    The optimization of microbial flocculation for subsequent biomass separation must relate the floc properties to separation process criteria. The effects of flocculant type, dose, and hydrodynamic conditions on floc formation in laminar tube flow were determined for an Escherichia coli system. Combined with an on‐line aggregation sensor, this technique allows the flocculation process to be

  • flocculation and antimicrobial properties of a cationized

    Flocculation and antimicrobial properties of a cationized

    Flocculation and antimicrobial properties of a cationized starch. Water Res. 2017; 119:57-66 (ISSN containing various quaternary ammonium salt groups on the starch backbone were prepared using a simple etherification reaction. All of the prepared starch-based flocculants show effective performance for the flocculation of kaolin suspension, two bacterial (Escherichia coli and Staphylococcus

  • modeling and optimization of the flocculation processes

    Modeling and optimization of the flocculation processes

    Yang Z, Degorce-Dumas JR, Yang H, Guibal E, Li AM, Cheng RS (2014a) Flocculation of escherichia coli using a quaternary ammonium salt grafted garboxymethyl chitosan flocculant. Environ Sci Technol 48:6867–6873 CrossRef Google Scholar

  • comment on “enumeration of escherichia coli in probiotic

    Comment on “Enumeration of Escherichia coli in Probiotic

    Recently, Zimmer and Dorea published a communication on the enumeration of Escherichia coli in probiotic products containing this species [...] View Full-Text This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

  • 発表論文 細胞工学研究室

    発表論文 細胞工学研究室

    A New Method to Purify Poly-γ-glutamic Acid Using Gemini Quaternary Ammonium Salts and Characterization of its Ionic Complex. J. Chem. Eng. Jpn., 51(5),431-437 (2018) F.M. Kashiwagi, Y. Ojima, M. Taya, Metabolic Engineering of Escherichia coli KO11 with NADH regeneration system for enhancing ethanol production.

  • fermentation pathways of escherichia coli fems

    fermentation pathways of Escherichia coli FEMS

    Abstract. Under anaerobic conditions and in the absence of alternative electron acceptors Escherichia coli converts sugars to a mixture of products by fermentation. The major soluble products are acetate, ethanol, lactate and formate with smaller amounts of succinate.

  • protocol of accepted drinking water testing methods ontario

    Protocol of Accepted Drinking Water Testing Methods Ontario

    Version 2.0 May 2010 1. INTRODUCTION This document sets out testing methods that may be used for the conduct of tests of Ontario drinking water.

  • quaternary ammonium salt of chitosan: preparation

    Quaternary ammonium salt of chitosan: preparation

    Antimicrobial activities of HACC was examined against S. aureus, E. coli, and A. niger. Results indicatd that the inhibitory effects of HACC solutions were varied with HACC concentration, quaternization degrees, pH values, metal ions, and heat treatment. The antimicrobial properties of handsheets prepared from HACC were studied by the inhibition zone method, and the sheets had good

  • pathogen safety data sheets: infectious substances

    Pathogen Safety Data Sheets: Infectious Substances

    These Pathogen Safety Data Sheets, regulated under Workplace Hazardous Materials Information System (WHMIS) legislation, are produced for personnel working in the life sciences as quick safety reference material relating to infectious micro-organisms.

  • unit 5 questions flashcards quizlet

    Unit 5 Questions Flashcards Quizlet

    Escherichia coli is a good indicator of water pollution because this bacterium A. is resistant to most antibiotics. B. is commonly found in the human intestine. C. grows only in high-salt environments. D. undergoes recombinations readily. E. it is motile and able to

  • genome-wide structure and function modeling

    Genome-wide Structure and Function Modeling

    The E. coli cells are able to survive outside the body for a limited amount of time, which makes them ideal indicator organisms to test environmental samples for fecal contamination. This page contains protein structure and function modeling data for the Escherichia coli genome, generated using the state of the art computational methods.

  • selective flocculation of cellular contaminants

    Selective flocculation of cellular contaminants

    Selective flocculation of cellular contaminants from soluble proteins using polyethyleneimine: A study of several organisms and polymer molecular weights. Enzyme and Microbial Technology,17 (2), 107-113.

  • escherichia coli alkaline phosphatase

    Escherichia coli Alkaline Phosphatase

    tertiary, and quaternary structure of Escherichia coli alkaline phosphatase have been studied by optical rotatory dispersion, circular dichroism, and sedimentation velocity and sedi- mentation equilibrium centrifugation, with the use of the native zinc enzyme, the apoenzyme, and an enzyme in which

  • exploring theoretical origins of the toxicity of organic

    Exploring Theoretical Origins of the Toxicity of Organic

    Escherichia coli with a range of concentrations of 1-ethyl-, 1-butyl-3-methylimidazolium carboxylates reported as growth rate percent of the control. Table 4. Qualitative toxicological profiling of 1-ethyl-, 87 1-butyl-3-methylimidazolium carboxylates with Escherichia coli

  • lpda dihydrolipoyl dehydrogenase escherichia coli

    lpdA Dihydrolipoyl dehydrogenase Escherichia coli

    Escherichia coli (strain K12) Status. Reviewed-Annotation score: -Experimental evidence at protein level i. Function i. Lipoamide dehydrogenase is a component of the glycine cleavage system as well as of the alpha-ketoacid dehydrogenase complexes.

  • chitosan flocculation: an effective method

    Chitosan flocculation: An effective method

    Despite very high concentrations of cells (10-100g cells/g chitosan) in the flocculated preparations, diffusion limitations were minimal. Flocculation with chitosan was considered a simple and effective method for immobilization of E. coli cells for biocatalytic processes.

  • kate catalase hpii escherichia coli (strain k12

    katE Catalase HPII Escherichia coli (strain K12

    Escherichia coli (strain K12) Status. Reviewed-Annotation score: -Experimental evidence at protein level i. Function i. Decomposes hydrogen peroxide into water and oxygen; serves to protect cells from the toxic effects of hydrogen peroxide.

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