4801
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SYNTHESIS OF METALLOPORPHYRIN-BASED MOLECULARLY IMPRINTED POLYMER AND ITS RECOGNITION PROPERTIES FOR TRIAZOLE FUNGICIDES. ACTA POLYM SIN 2009. [DOI: 10.3724/sp.j.1105.2009.00809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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4802
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Ignatova M, Stoilova O, Manolova N, Mita D, Diano N, Nicolucci C, Rashkov I. Electrospun microfibrous poly(styrene-alt-maleic anhydride)/poly(styrene-co-maleic anhydride) mats tailored for enzymatic remediation of waters polluted by endocrine disruptors. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.06.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4803
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Gupta P, Dutt K, Misra S, Raghuwanshi S, Saxena RK. Characterization of cross-linked immobilized lipase from thermophilic mould Thermomyces lanuginosa using glutaraldehyde. BIORESOURCE TECHNOLOGY 2009; 100:4074-4076. [PMID: 19403306 DOI: 10.1016/j.biortech.2009.03.076] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 03/26/2009] [Accepted: 03/26/2009] [Indexed: 05/27/2023]
Abstract
Cross-linked enzyme aggregates (CLEAs) have emerged as an interesting biocatalyst design for immobilization. Using this approach, a 1,3 regiospecific, alkaline and thermostable lipase from Thermomyces lanuginosa was immobilized. Efficient cross-linking was observed when ammonium sulphate was used as precipitant along with a two fold increase in activity in presence of SDS. The TEM and SEM microphotographs of the CLEAs formed reveal that the enzyme aggregates are larger in size as compared to the free lipase due to the cross-linking of enzyme aggregates with glutaraldehyde. The stability and reusability of the CLEA with respect to olive oil hydrolysis was evaluated. The CLEA showed more than 90% residual activity even after 10 cycles of repeated use.
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Affiliation(s)
- Pritesh Gupta
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi 110 021, India
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4804
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Yang D, Wang Y, Zhang D, Liu Y, Jiang X. Control of the morphology of micro/nanostructures of polycarbonate via electrospinning. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11434-009-0241-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4805
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Deng Z, Li S, Jiang X, Narain R. Well-Defined Galactose-Containing Multi-Functional Copolymers and Glyconanoparticles for Biomolecular Recognition Processes. Macromolecules 2009. [DOI: 10.1021/ma9010457] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhicheng Deng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2G6, Canada
- Biomolecular Sciences Program, Department of Chemistry and Biochemistry, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada
| | - Suqi Li
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2G6, Canada
| | - Xiaoze Jiang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2G6, Canada
- Biomolecular Sciences Program, Department of Chemistry and Biochemistry, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada
| | - Ravin Narain
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2G6, Canada
- Biomolecular Sciences Program, Department of Chemistry and Biochemistry, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada
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4806
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Wang H, Yin Y, Yang S, Li C. Surface modification of polypropylene microporous membrane by grafting acrylic acid using physisorbed initiators method. J Appl Polym Sci 2009. [DOI: 10.1002/app.29681] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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4807
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Characterization and properties of catalase immobilized onto controlled pore glass and its application in batch and plug-flow type reactors. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.12.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4808
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4809
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Zhang YT, Fan LH, Zhi TT, Zhang L, Huang H, Chen HL. Synthesis and characterization of poly(acrylic acid-co-acrylamide)/hydrotalcite nanocomposite hydrogels for carbonic anhydrase immobilization. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23367] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4810
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Wan LS, Xu ZK. Polymer surfaces structured with random or aligned electrospun nanofibers to promote the adhesion of blood platelets. J Biomed Mater Res A 2009; 89:168-75. [PMID: 18431780 DOI: 10.1002/jbm.a.31907] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fibrous membranes (nonwoven meshes) prepared via electrospinning technique have great potential in tissue engineering. This work is the first study on the behaviors of blood platelets at the nanostructured surface generated by electrospinning. Poly[acrylonitrile-co-(N-vinyl-2-pyrrolidone)] (PANCNVP) that shows excellent antiplatelet adhesion ability was directly electrospun onto its dense membrane surface. Polyacrylonitrile (PAN) samples were used as controls. The depth as well as the density of the nanofibers can be easily controlled. The results showed that the PANCNVP dense membrane certainly suppressed the activation and adhesion of platelets. However, whether the nanofibers and underlying membranes were composed of PAN or PANCNVP, the nanostructured surfaces promoted the activation, adhesion, and orientation of platelets. It was also found that, if the space between fibers was too large or the depth of fibers was too small, the nanostructured surface did not change the property of antiplatelet adhesion of PANCNVP. The promotion of activation and adhesion of platelets was obviously due to the presence of nanofibers, which induced the changes of surface topography and charge.
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Affiliation(s)
- Ling-Shu Wan
- Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China
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4811
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Ozmen EY, Sezgin M, Yilmaz M. Synthesis and characterization of cyclodextrin-based polymers as a support for immobilization of Candida rugosa lipase. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.07.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4812
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Yi SS, Noh JM, Lee YS. Amino acid modified chitosan beads: Improved polymer supports for immobilization of lipase from Candida rugosa. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.08.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4813
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Hoven VP, Chombanpaew K, Iwasaki Y, Tasakorn P. Improving blood compatibility of natural rubber by UV-induced graft polymerization of hydrophilic monomers. J Appl Polym Sci 2009. [DOI: 10.1002/app.29408] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4814
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WANG H, YANG L, ZHAO X, YU T, DU Q. Improvement of Hydrophilicity and Blood Compatibility on Polyethersulfone Membrane by Blending Sulfonated Polyethersulfone. Chin J Chem Eng 2009. [DOI: 10.1016/s1004-9541(08)60211-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4815
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4816
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Tao K, Wang Y, Wang W, Lu D, Wang Y, Bai R. Synthesis and Self-Assembly of Novel Amphiphilic Six-Armed Star Copolymers TP[PDMAEMA-b-PSt]6. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200800498] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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4817
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Prakash PA, Yogeswaran U, Chen SM. A review on direct electrochemistry of catalase for electrochemical sensors. SENSORS 2009; 9:1821-44. [PMID: 22573989 PMCID: PMC3345822 DOI: 10.3390/s90301821] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 03/03/2009] [Accepted: 03/13/2009] [Indexed: 11/16/2022]
Abstract
Catalase (CAT) is a heme enzyme with a Fe(III/II) prosthetic group at its redox centre. CAT is present in almost all aerobic living organisms, where it catalyzes the disproportionation of H2O2 into oxygen and water without forming free radicals. In order to study this catalytic mechanism in detail, the direct electrochemistry of CAT has been investigated at various modified electrode surfaces with and without nanomaterials. The results show that CAT immobilized on nanomaterial modified electrodes shows excellent catalytic activity, high sensitivity and the lowest detection limit for H2O2 determination. In the presence of nanomaterials, the direct electron transfer between the heme group of the enzyme and the electrode surface improved significantly. Moreover, the immobilized CAT is highly biocompatible and remains extremely stable within the nanomaterial matrices. This review discusses about the versatile approaches carried out in CAT immobilization for direct electrochemistry and electrochemical sensor development aimed as efficient H2O2 determination. The benefits of immobilizing CAT in nanomaterial matrices have also been highlighted.
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Affiliation(s)
- Periasamy Arun Prakash
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan (ROC); E-Mails: (P.A.P.); (U.Y.)
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4818
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Raynor JE, Petrie TA, Fears KP, Latour RA, García AJ, Collard DM. Saccharide Polymer Brushes To Control Protein and Cell Adhesion to Titanium. Biomacromolecules 2009; 10:748-55. [DOI: 10.1021/bm8011924] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jenny E. Raynor
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Timothy A. Petrie
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Kenan P. Fears
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Robert A. Latour
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Andrés J. García
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - David M. Collard
- School of Chemistry and Biochemistry, and Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
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4819
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Preparation of antifouling ultrafiltration membranes with poly(ethylene glycol)-graft-polyacrylonitrile copolymers. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.01.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4820
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Immobilization of β-galactosidase by bioaffinity adsorption on concanavalin A layered calcium alginate–starch hybrid beads for the hydrolysis of lactose from whey/milk. Int Dairy J 2009. [DOI: 10.1016/j.idairyj.2008.10.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4821
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Zhou Y, Lim LT. Activation of Lactoperoxidase System in Milk by Glucose Oxidase Immobilized in Electrospun Polylactide Microfibers. J Food Sci 2009; 74:C170-6. [DOI: 10.1111/j.1750-3841.2009.01071.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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4822
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Enescu D. Polydimethylsiloxane Modified Chitosan IV. Preparation and Characterization of Porous Hybrid Membranes. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2009. [DOI: 10.1080/10601320902732498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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4823
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Du C, Zhang G, Wang Z, Li L, Tang J, Wang L. Application of ring-opening metathesis polymerization in study of polymer molecular weight-mediated catalytic properties of immobilized lipase. Sci Bull (Beijing) 2009. [DOI: 10.1007/s11434-008-0553-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4824
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Kumari A, Mahapatra P, Garlapati VK, Banerjee R. Enzymatic transesterification of Jatropha oil. BIOTECHNOLOGY FOR BIOFUELS 2009; 2:1. [PMID: 19144158 PMCID: PMC2639572 DOI: 10.1186/1754-6834-2-1] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 01/14/2009] [Indexed: 05/03/2023]
Abstract
BACKGROUND Transesterification of Jatropha oil was carried out in t-butanol solvent using immobilized lipase from Enterobacter aerogenes. The presence of t-butanol significantly reduced the negative effects caused by both methanol and glycerol. The effects of various reaction parameters on transesterification of Jatropha oil were studied. RESULTS The maximum yield of biodiesel was 94% (of which 68% conversion was achieved with respect to methyl oleate) with an oil:methanol molar ratio of 1:4, 50 U of immobilized lipase/g of oil, and a t-butanol:oil volume ratio of 0.8:1 at 55 degrees C after 48 h of reaction time. There was negligible loss in lipase activity even after repeated use for seven cycles. CONCLUSION To the best of our knowledge this is the first report on biodiesel synthesis using immobilized E. aerogenes lipase.
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Affiliation(s)
- Annapurna Kumari
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Paramita Mahapatra
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Vijay Kumar Garlapati
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Rintu Banerjee
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
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4825
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Hadjiargyrou M, Chiu JB. Enhanced composite electrospun nanofiber scaffolds for use in drug delivery. Expert Opin Drug Deliv 2009; 5:1093-106. [PMID: 18817515 DOI: 10.1517/17425247.5.10.1093] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The utility of nanofibrous electrospun composite scaffolds has greatly expanded over the last decade, so that they now serve as viable drug delivery vehicles for a host of different biomedical applications. The material properties of electrospun scaffolds are extremely advantageous for drug delivery, in which site-specificity and lower overall medicinal dosages lead to a potential industry-altering mechanism of delivering therapeutics. Different drugs used to predominantly treat infections and cancers can easily be incorporated and released at therapeutic dosages. Further, the inherent high porosity of these electrospun scaffolds allows for a more precisely controlled degradation which is tunable by polymer composition and fiber morphology, leading to sustained drug release. This review examines the current research and breakthrough discoveries that have elevated electrospun scaffolds to a cutting-edge technology that will dramatically alter the landscape of drug delivery.
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Affiliation(s)
- Michael Hadjiargyrou
- Associate Professor Stony Brook University, Department of Biomedical Engineering, Stony Brook, NY 11794, USA.
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4826
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Jang E, Park S, Park S, Lee Y, Kim DN, Kim B, Koh WG. Fabrication of poly(ethylene glycol)-based hydrogels entrapping enzyme-immobilized silica nanoparticles. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1455] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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4827
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4828
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Wang X, Dou P, Zhao P, Zhao C, Ding Y, Xu P. Immobilization of lipases onto magnetic Fe(3)O(4) nanoparticles for application in biodiesel production. CHEMSUSCHEM 2009; 2:947-50. [PMID: 19780103 DOI: 10.1002/cssc.200900174] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Affiliation(s)
- Xia Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, PR China
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4829
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Zarevúcka M, Wimmer Z. Plant products for pharmacology: application of enzymes in their transformations. Int J Mol Sci 2008; 9:2447-2473. [PMID: 19330086 PMCID: PMC2635649 DOI: 10.3390/ijms9122447] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 11/24/2008] [Accepted: 12/03/2008] [Indexed: 12/16/2022] Open
Abstract
Different plant products have been subjected to detailed investigations due to their increasing importance for improving human health. Plants are sources of many groups of natural products, of which large number of new compounds has already displayed their high impact in human medicine. This review deals with the natural products which may be found dissolved in lipid phase (phytosterols, vitamins etc.). Often subsequent convenient transformation of natural products may further improve the pharmacological properties of new potential medicaments based on natural products. To respect basic principles of sustainable and green procedures, enzymes are often employed as efficient natural catalysts in such plant product transformations. Transformations of lipids and other natural products under the conditions of enzyme catalysis show increasing importance in environmentally safe and sustainable production of pharmacologically important compounds. In this review, attention is focused on lipases, efficient and convenient biocatalysts for the enantio- and regioselective formation / hydrolysis of ester bond in a wide variety of both natural and unnatural substrates, including plant products, eg. plant oils and other natural lipid phase compounds. The application of enzymes for preparation of acylglycerols and transformation of other natural products provides big advantage in comparison with employing of conventional chemical methods: Increased selectivity, higher product purity and quality, energy conservation, elimination of heavy metal catalysts, and sustainability of the employed processes, which are catalyzed by enzymes. Two general procedures are used in the transformation of lipid-like natural products: (a) Hydrolysis/alcoholysis of triacylglycerols and (b) esterification of glycerol. The reactions can be performed under conventional conditions or in supercritical fluids/ionic liquids. Enzyme-catalyzed reactions in supercritical fluids combine the advantages of biocatalysts (substrate specificity under mild reaction conditions) and supercritical fluids (high mass-transfer rate, easy separation of reaction products from the solvent, environmental benefits based on excluding organic solvents from the production process).
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Affiliation(s)
- Marie Zarevúcka
- Institute of Organic Chemistry and Biochemistry, AS CR, Flemingovo náměstí 2, 166 10 Prague 6 – Dejvice, Czech Republic. E-Mail:
| | - Zdeněk Wimmer
- Institute of Experimental Botany AS CR, Isotope Laboratory, Vídeňská 1083, 142 20 Prague 4 – Krč, Czech Republic
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4830
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Bogdanova YG, Dolzhikova VD, Belov GP, Golodkov ON, Chalykh AE. Prediction of biocompatibility of olefin-carbon monoxide alternating copolymers from their surface energy parameters. ACTA ACUST UNITED AC 2008. [DOI: 10.3103/s0027131408050064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4831
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Berekaa MM, Zaghloul TI, Abdel-Fattah YR, Saeed HM, Sifour M. Production of a novel glycerol-inducible lipase from thermophilic Geobacillus stearothermophilus strain-5. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9891-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4832
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Gabrovska K, Nedelcheva T, Godjevargova T, Stoilova O, Manolova N, Rashkov I. Immobilization of acetylcholinesterase on new modified acrylonitrile copolymer membranes. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2008.03.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4833
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Lu T, Chen X, Shi Q, Wang Y, Zhang P, Jing X. The immobilization of proteins on biodegradable fibers via biotin-streptavidin bridges. Acta Biomater 2008; 4:1770-7. [PMID: 18562258 DOI: 10.1016/j.actbio.2008.05.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2008] [Revised: 04/04/2008] [Accepted: 05/09/2008] [Indexed: 11/25/2022]
Abstract
This paper aims at developing novel bioactive fibrous mats for protein immobilization and for protein separation/purification. For this purpose, an amphiphilic triblock copolymer, biotinylated poly(ethylene glycol)-b-poly(L-lactide)-b-poly(L-lysine) was co-electrospun together with poly(L-lactide-co-glycolide) into ultrafine fibers approximately 2 microm in diameter, and a layer of blocking agent was coated on the fiber surfaces to block off possible non-specific binding of proteins. The biotin species retained their ability to specifically recognize and bind streptavidin, and the immobilized streptavidin could further combine with biotinylated antibodies, antigens and other biological moieties. Horseradish peroxidase-labeled streptavidin and fluorescein isothiocyanate-labeled goat globulin were used to detect the immobilizations of streptavidin and rabbit anti-goat IgG(H+L) via enzyme-linked immunoassay and confocal laser scanning microscope, respectively. The immobilized antigen was eluted from the fiber substrate with a glycine/HCl solution and the eluted antigen retained its bioactivity. Therefore, these biotin-carrying composite fibers have a variety of uses, including selective immobilization of functional proteins, antigen/antibody separation and purification, and vaccine preparation.
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4834
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4835
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Bhushan I, Parshad R, Ghulam Nabi Qazi, Vijay Kumar Gupta. Immobilization of Lipase by Entrapment in Ca-alginate Beads. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911508097866] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The lipase-producing strain, Arthrobacter sp. (ABL), isolated was immobilized in Ca-alginate beads by entrapment. The alginate beads were prepared as an aqueous mixture of sodium alginate, the cells and CaCl2 to increase its reusability, and overall enzyme stability. Various parameters like alginate and CaCl2 concentration, lipase units loading and bead size were evaluated for optimum immobilization yield. It was observed that with the increase in alginate concentration, the yield of immobilized enzyme also increased up to a limit. A similar pattern was observed with CaCl2 addition; the optimum concentrations of alginate and CaCl2 observed were 1.5% (w/v) and 2%, respectively. The concentration of enzyme entrapped in the beads with an activity of 5 units per gram of wet beads was obtained by the addition of 100 units in 10 mL of slurry; beyond this amount a very little increase in activity was observed. The maximum immobilization yield was observed with a 1.2 mm bead size; increased bead sizes decreased the yield of immobilization. After optimization of all the parameters, a 40% yield of lipase (ABL) activity was observed in the Ca-alginate beads. These lipase beads were used for 10 cycles for the hydrolysis of triglycerides without any loss in activity. The entrapped lipase was more stable over a wide range of temperatures, pH, and storage time as compared to free enzyme.
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Affiliation(s)
- Indu Bhushan
- Indian Institute of Integrative Medicine (CSIR), Canal Road Jammu-Tawi, (J&K) India 180001
| | - Rajinder Parshad
- Indian Institute of Integrative Medicine (CSIR), Canal Road Jammu-Tawi, (J&K) India 180001, ,
| | - Ghulam Nabi Qazi
- Indian Institute of Integrative Medicine (CSIR), Canal Road Jammu-Tawi, (J&K) India 180001
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4836
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Che AF, Liu ZM, Huang XJ, Wang ZG, Xu ZK. Chitosan-Modified Poly(acrylonitrile-co-acrylic acid) Nanofibrous Membranes for the Immobilization of Concanavalin A. Biomacromolecules 2008; 9:3397-403. [DOI: 10.1021/bm800882z] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ai-Fu Che
- Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
| | - Zhen-Mei Liu
- Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
| | - Xiao-Jun Huang
- Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
| | - Zhen-Gang Wang
- Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
| | - Zhi-Kang Xu
- Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
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4837
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Işıklan N, İnal M, Yiğitoğlu M. Synthesis and characterization of poly(N-vinyl-2-pyrrolidone) grafted sodium alginate hydrogel beads for the controlled release of indomethacin. J Appl Polym Sci 2008. [DOI: 10.1002/app.28577] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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4838
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4839
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Essawy AA, Ali AEH, Abdel-Mottaleb MSA. Application of novel copolymer-TiO(2) membranes for some textile dyes adsorptive removal from aqueous solution and photocatalytic decolorization. JOURNAL OF HAZARDOUS MATERIALS 2008; 157:547-552. [PMID: 18321639 DOI: 10.1016/j.jhazmat.2008.01.072] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 12/15/2007] [Accepted: 01/09/2008] [Indexed: 05/26/2023]
Abstract
Novel low density polyethylene-grafted-poly(4-vinylpyridine-co-acrylamide) (LDPE-g-P(4-VP/AAm)) films were prepared by means of gamma-radiation-induced graft copolymerization as support for photocatalytic application. Nanometer-sized TiO(2) particles were immobilized to the grafted LDPE via dip coating technique. The efficiency of immobilized photocatalyst is tested on two target pollutants (textile azo dyes: Remazol red RB-133 (RR RB 133) and reactive blue 2 (RB2)). The efficient photocatalytic ability as reflected in determined photobleaching rate of both dyes was observed and is comparable to that for the non-supported TiO(2) used in a typical slurry photoreactor. The LDPE-g-(4-VP/AAm) copolymers supported TiO(2) photocatalyst has the practical advantages of easy separation and removal from the polluted environment. It could be a viable technique for the safe disposal of textile wastewater into the water streams.
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Affiliation(s)
- Amr A Essawy
- Nano-Photochemistry and Solarchemistry Lab, Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt
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4840
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Huang XJ, Yu AG, Xu ZK. Covalent immobilization of lipase from Candida rugosa onto poly(acrylonitrile-co-2-hydroxyethyl methacrylate) electrospun fibrous membranes for potential bioreactor application. BIORESOURCE TECHNOLOGY 2008; 99:5459-5465. [PMID: 18248984 DOI: 10.1016/j.biortech.2007.11.009] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 11/02/2007] [Accepted: 11/05/2007] [Indexed: 05/25/2023]
Abstract
A simple way of fabricating enzymatic membrane reactor with high enzyme loading and activity retention from the conjugation between nanofibrous membrane and lipase was devised. Poly(acrylonitrile-co-2-hydroxyethyl methacrylate) (PANCHEMA) was electrospun into fibrous membrane and used as support for enzyme immobilization. The hydroxyl groups on the fibrous membrane surface were activated with epichlorohydrin, cyanuric chloride or p-benzoquinone, respectively. Lipase from Candida rugosa was covalently immobilized on these fibrous membranes. The resulted bioactive fibrous membranes were examined in catalytic efficiency and activity for hydrolysis. The observed enzyme loading on the fibrous membrane with fiber diameter of 80-150 nm was up to 1.6% (wt/wt), which was as thrice as that on the fibrous membrane with fiber diameter of 800-1,000 nm. Activity retention for the immobilized lipase varied between 32.5% and 40.6% with the activation methods of hydroxyl groups. Stabilities of the immobilized lipase were obviously improved. In addition, continuous hydrolysis was carried out with an enzyme-immobilized fibrous membrane bioreactor and a steady hydrolysis conversion (3.6%) was obtained at a 0.23 mL/min flow rate under optimum condition.
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Affiliation(s)
- Xiao-Jun Huang
- Institute of Polymer Science, Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, PR China
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4841
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Su Y, Li C, Zhao W, Shi Q, Wang H, Jiang Z, Zhu S. Modification of polyethersulfone ultrafiltration membranes with phosphorylcholine copolymer can remarkably improve the antifouling and permeation properties. J Memb Sci 2008. [DOI: 10.1016/j.memsci.2008.05.047] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4842
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Kriegel C, Arrechi A, Kit K, McClements DJ, Weiss J. Fabrication, Functionalization, and Application of Electrospun Biopolymer Nanofibers. Crit Rev Food Sci Nutr 2008; 48:775-97. [DOI: 10.1080/10408390802241325] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4843
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Sánchez-Otero MG, Valerio-Alfaro G, García-Galindo HS, Oliart-Ros RM. Immobilization in the presence of Triton X-100: modifications in activity and thermostability of Geobacillus thermoleovorans CCR11 lipase. J Ind Microbiol Biotechnol 2008; 35:1687-93. [DOI: 10.1007/s10295-008-0433-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Accepted: 07/30/2008] [Indexed: 11/25/2022]
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4844
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4845
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Lee Y, Kim DN, Choi D, Lee W, Park J, Koh W. Preparation of interpenetrating polymer network composed of poly(ethylene glycol) and poly(acrylamide) hydrogels as a support of enzyme immobilization. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4846
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Wang D, Sun G, Xiang B, Chiou BS. Controllable biotinylated poly(ethylene-co-glycidyl methacrylate) (PE-co-GMA) nanofibers to bind streptavidin–horseradish peroxidase (HRP) for potential biosensor applications. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.04.042] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4847
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Karra-Châabouni M, Bouaziz I, Boufi S, Botelho do Rego AM, Gargouri Y. Physical immobilization of Rhizopus oryzae lipase onto cellulose substrate: activity and stability studies. Colloids Surf B Biointerfaces 2008; 66:168-77. [PMID: 18684596 DOI: 10.1016/j.colsurfb.2008.06.010] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Revised: 05/19/2008] [Accepted: 06/12/2008] [Indexed: 11/18/2022]
Abstract
Rhizopus oryzae lipase (ROL) was immobilized by adsorption onto oxidized cellulose fibers and regenerated films. The maximum adsorption level increases with the raise in the amount of carboxylic groups on cellulose surface confirming that adsorption is being governed mainly by electrostatic interaction between the enzyme and the substrate. This hypothesis was further confirmed by zeta-potential measurements showing a decrease in the zeta-potential of the fibers after enzyme adsorption. XPS analysis showed an intensification of the N 1s peak attesting the presence of the enzyme on the surface. The effect of temperature, pH and solvent polarity on the immobilized enzyme activity and stability was investigated. The catalytic esterification of oleic acid with n-butanol has been carried on using hexane as an organic solvent. A high conversion yield was obtained (about 80%) at 37 degrees C with a molar ratio of oleic acid to butanol 1:1 and 150IU immobilized lipase. The adsorption achieved two successive cycles with the same efficiency, and started to lose its activity during the third cycle.
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Affiliation(s)
- Maha Karra-Châabouni
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS route de Soukra, Sfax, Tunisia
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4848
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Lv YY, Wu J, Wan LS, Xu ZK. Novel Porphyrinated Polyimide Nanofibers by Electrospinning. THE JOURNAL OF PHYSICAL CHEMISTRY C 2008. [DOI: 10.1021/jp7105549] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yuan-Yuan Lv
- Department of Chemistry, Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China, Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China
| | - Jian Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China, Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China
| | - Ling-Shu Wan
- Department of Chemistry, Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China, Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China
| | - Zhi-Kang Xu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China, Institute of Polymer Science, and Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Zhejiang University, Hangzhou 310027, Peopleʼs Republic of China
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4849
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Dror Y, Kuhn J, Avrahami R, Zussman E. Encapsulation of Enzymes in Biodegradable Tubular Structures. Macromolecules 2008. [DOI: 10.1021/ma071599r] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Dror
- Faculty of Mechanical Engineering and Faculty of Biology, Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - J. Kuhn
- Faculty of Mechanical Engineering and Faculty of Biology, Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - R. Avrahami
- Faculty of Mechanical Engineering and Faculty of Biology, Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - E. Zussman
- Faculty of Mechanical Engineering and Faculty of Biology, Technion, Israel Institute of Technology, Haifa 32000, Israel
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4850
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Mark SS, Stolper SI, Baratti C, Park JY, Taku MA, Santiago-Avilés JJ, Kricka LJ. Bioconjugation of Alkaline Phosphatase to Mechanically Processed, Aqueous Suspendible Electrospun Polymer Nanofibers for Use in Chemiluminescent Detection Assays. Macromol Biosci 2008; 8:484-98. [DOI: 10.1002/mabi.200800016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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