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Jacobs GP. Irradiation of pharmaceuticals: A literature review. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2021.109795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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SreeHarsha N, Ghorpade RV, Alzahrani AM, Al-Dhubiab BE, Venugopala KN. Immobilization studies of Candida Antarctica lipase B on gallic acid resin-grafted magnetic iron oxide nanoparticles. Int J Nanomedicine 2019; 14:3235-3244. [PMID: 31118633 PMCID: PMC6504639 DOI: 10.2147/ijn.s203547] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 03/19/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose: Here, we present the successful preparation of a highly efficient gallic acid resin grafted with magnetic nanoparticles (MNPs) and containing a branched brush polymeric shell. Methods: Using a convenient co-precipitation method, we prepared Fe3O4 nanoparticles stabilized by citric acid. These nanoparticles underwent further silica modification and amino functionalization followed by gallic acid functionalization on their surface. Under alkaline conditions, we used a condensation reaction that combined formaldehyde and gallic, to graft the gallic acid-formaldehyde resin on the surface. We then evaluated the polymer-grafted MNPs to assay the Candida Antarctica B lipase(Cal-B) immobilization via physical adsorption. Conclusion: Furthermore, during optimization of parameters that defined conditions of immobilization, we found that the optimum immobilization was achieved in 15 mins. Also, optimal immobilization temperature and pH were 38ºC and 7.5, respectively. In addition, the reusability study of immobilized lipase polymer-grafted MNPs was done by isolating the MNPs from the reaction medium using magnetic separation, which showed that grafted MNPs reached 5 cycles with 91% activity retention.
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Affiliation(s)
- Nagaraja SreeHarsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Ravindra V Ghorpade
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune411 008, India
| | - Abdullah Mossa Alzahrani
- Department of Biological Sciences, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Bandar E Al-Dhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban4001, South Africa
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Jia H, Huang F, Gao Z, Zhong C, Zhou H, Jiang M, Wei P. Immobilization of ω-transaminase by magnetic PVA-Fe 3O 4 nanoparticles. ACTA ACUST UNITED AC 2016; 10:49-55. [PMID: 28352524 PMCID: PMC5040871 DOI: 10.1016/j.btre.2016.03.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 11/21/2022]
Abstract
Core–shell composite Fe3O4-PVA was prepared successfully by chemical co-precipitation, and it has a good characterization results. Fe3O4-PVA was firstly and successfully used to immobilize ω-TA. ω-TA which immobilized onto Fe3O4-PVA could be successfully separated and reused for many times in biotransformation with its activity no declined.
ω-Transaminase (ω-TA) as a kind of important biocatalyst is widely used in preparation of chiral intermediates. In this paper, a magnetic PVA-Fe3O4 nanoparticles was prepared and employed on immobilization of ω-TA to reduce the cost, increase reusability and enhance stability. The prepared magnetic PVA-Fe3O4 nanoparticles were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The average size of magnetic PVA-Fe3O4 nanoparticles was located between 30–40 nm ω-TA was immobilized onto magnetic PVA-Fe3O4 nanoparticles via glutaraldehyde cross-linking, achieving a wider pH range as 6–8 and also a better thermal stability at 60 °C. Meanwhile, the immobilized ω-TA could be successfully reused for 13 times in biotransformation. These results therefore indicated that the immobilized ω-TA with high stability might be readily utilized in industrial purposes.
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Zhuang W, Zhang Y, Zhu J, An R, Li B, Mu L, Ying H, Wu J, Zhou J, Chen Y, Lu X. Influences of geometrical topography and surface chemistry on the stable immobilization of adenosine deaminase on mesoporous TiO 2. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2015.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Han JH, Kim J, Acter S, Kim Y, Lee HN, Chang HK, Suh KD, Kim JW. Uniform hollow-structured poly(vinyl amine) hydrogel microparticles with controlled mesh property and enhanced cell adhesion. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wu MH, Yang HW, Hua MY, Peng YB, Pan TM. High-κ GdTixOy sensing membrane-based electrolyte-insulator-semiconductor with magnetic nanoparticles as enzyme carriers for protein contamination-free glucose biosensing. Biosens Bioelectron 2013; 47:99-105. [PMID: 23567628 DOI: 10.1016/j.bios.2013.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 02/19/2013] [Accepted: 03/08/2013] [Indexed: 12/01/2022]
Abstract
This paper reports an electrolyte-insulator-semiconductor (EIS) device featuring a novel high-κ GdTixOy sensing membrane for high-performance pH sensing and glucose biosensing. The effect of the annealing temperature (700, 800, or 900°C) on the sensing properties of the GdTixOy membranes was investigated. The GdTixOy EIS device annealed at 900°C exhibited the greatest pH sensing performance, including the highest sensitivity (62.12mV/pH), the smallest hysteresis voltage (5mV), and the lowest drift rate (0.4mV/h), presumably because of its well-crystallized GdTixOy structure. To overcome the problems typically encountered during the practical application of biosensors (e.g., protein adsorption; preservation of enzymatic activity), we employed Fe3O4-based magnetic nanoparticles (MNPs) as enzyme carriers. The adsorption of serum protein on the unmodified sensing membrane led to poor EIS-based pH sensing (r(2)=0.71); the performance was greatly improved, however, after attaching the MNPs to the sensing membrane, thereby blocking protein adsorption significantly (by 98%) and allowing excellent pH sensing (r(2)=0.99). Moreover, we prepared a hybrid configuration of the proposed GdTixOy membrane-EIS, with magnetically attached glucose oxidase-immobilized MNPs, for glucose biosensing. The use of MNPs as enzyme carriers effectively preserved the enzymatic activity of glucose oxidase, with 45.3% of the original enzymatic activity retained after 120h of storage at 4°C (compared with complete loss of the free enzyme's activity under the same storage conditions). In addition, the proposed biosensor exhibited superior detection sensitivity of 11.03mV/mM relative to that (8.17mV/mM) obtained using the conventional enzyme immobilization method. Finally, we established the accuracy of the proposed method for blood glucose measurement; gratifyingly, blood glucose detection was comparable with the high-sensitivity glucose quantification obtained using a commercial glucose assay kit.
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Affiliation(s)
- Min-Hsien Wu
- Graduate Institute of Biochemical and Biomedical Engineering, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan
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Reusable sensor based on high magnetization carboxyl-modified graphene oxide with intrinsic hydrogen peroxide catalytic activity for hydrogen peroxide and glucose detection. Biosens Bioelectron 2013; 41:172-9. [DOI: 10.1016/j.bios.2012.08.008] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 08/02/2012] [Accepted: 08/03/2012] [Indexed: 11/17/2022]
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Yang HW, Hua MY, Lin KJ, Wey SP, Tsai RY, Wu SY, Lu YC, Liu HL, Wu T, Ma YH. Bioconjugation of recombinant tissue plasminogen activator to magnetic nanocarriers for targeted thrombolysis. Int J Nanomedicine 2012; 7:5159-73. [PMID: 23055728 PMCID: PMC3464084 DOI: 10.2147/ijn.s32939] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Low-toxicity magnetic nanocarriers (MNCs) composed of a shell of poly [aniline-co-N-(1-one-butyric acid) aniline] over a Fe(3)O(4) magnetic nanoparticle core were developed to carry recombinant tissue plasminogen activator (rtPA) in MNC-rtPA for targeted thrombolysis. With an average diameter of 14.8 nm, the MNCs exerted superparamagnetic properties. Up to 276 μg of active rtPA was immobilized per mg of MNCs, and the stability of the immobilized rtPA was greatly improved during storage at 4°C and 25°C. In vitro thrombolysis testing with a tubing system demonstrated that magnet-guided MNC-rtPA showed significantly improved thrombolysis compared with free rtPA and reduced the clot lysis time from 39.2 ± 3.2 minutes to 10.8 ± 4.2 minutes. In addition, magnet-guided MNC-rtPA at 20% of the regular rtPA dose restored blood flow within 15-25 minutes of treatment in a rat embolism model without triggering hematological toxicity. In conclusion, this improved system is based on magnetic targeting accelerated thrombolysis and is potentially amenable to therapeutic applications in thromboembolic diseases.
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Affiliation(s)
- Hung-Wei Yang
- Chang Gung Molecular Medicine Research Center, Department of Chemical and Materials Engineering, Chang Gung Memorial Hospital, Kuei-Shan, Tao-Yuan, Taiwan, Republic of China
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Demir AS, Talpur FN, Betul Sopaci S, Kohring GW, Celik A. Selective oxidation and reduction reactions with cofactor regeneration mediated by galactitol-, lactate-, and formate dehydrogenases immobilized on magnetic nanoparticles. J Biotechnol 2011; 152:176-83. [DOI: 10.1016/j.jbiotec.2011.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 01/12/2011] [Accepted: 03/01/2011] [Indexed: 10/18/2022]
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Miletić N, Abetz V, Ebert K, Loos K. Immobilization of Candida antarctica lipase B on Polystyrene Nanoparticles. Macromol Rapid Commun 2009; 31:71-4. [PMID: 21590839 DOI: 10.1002/marc.200900497] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Revised: 08/24/2009] [Indexed: 11/06/2022]
Abstract
Polystyrene (PS) nanoparticles were prepared via a nanoprecipitation process. The influence of the pH of the buffer solution used during the immobilization process on the loading of Candida antarctica lipase B (Cal-B) and on the hydrolytic activity (hydrolysis of p-nitrophenyl acetate) of the immobilized Cal-B was studied. The pH of the buffer solution has no influence on enzyme loading, while immobilized enzyme activity is very dependent on the pH of adsorption. Cal-B immobilized on PS nanoparticles in buffer solution pH 6.8 performed higher hydrolytic activity than crude enzyme powder and Novozyme 435.
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Affiliation(s)
- Nemanja Miletić
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Kapoor M, Kuhad RC. Immobilization of xylanase from Bacillus pumilus strain MK001 and its application in production of xylo-oligosaccharides. Appl Biochem Biotechnol 2008; 142:125-38. [PMID: 18025574 DOI: 10.1007/s12010-007-0013-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Revised: 07/18/2006] [Accepted: 07/25/2006] [Indexed: 10/23/2022]
Abstract
Xylanase from Bacillus pumilus strain MK001 was immobilized on different matrices following varied immobilization methods. Entrapment using gelatin (GE) (40.0%), physical adsorption on chitin (CH) (35.0%), ionic binding with Q-sepharose (Q-S) (45.0%), and covalent binding with HP-20 beads (42.0%) showed the maximum xylanase immobilization efficiency. The optimum pH of immobilized xylanase shifted up to 1.0 unit (pH 7.0) as compared to free enzyme (pH 6.0). The immobilized xylanase exhibited higher pH stability (up to 28.0%) in the alkaline pH range (7.0-10.0) as compared to free enzyme. Optimum temperature of immobilized xylanase was observed to be 8 degrees C higher (68.0 degrees C) than free enzyme (60.0 degrees C). The free xylanase retained 50.0% activity, whereas xylanase immobilized on HP-20, Q-S, CH, and GE retained 68.0, 64.0, 58.0, and 57.0% residual activity, respectively, after 3 h of incubation at 80.0 degrees C. The immobilized xylanase registered marginal increase and decrease in Km and Vmax values, respectively, as compared to free enzyme. The immobilized xylanase retained up to 70.0% of its initial hydrolysis activity after seven enzyme reaction cycles. The immobilized xylanase was found to produce higher levels of high-quality xylo-oligosaccharides from birchwood xylan, indicating its potential in the nutraceutical industry.
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Affiliation(s)
- Mukesh Kapoor
- Lignocellulose Biotechnology Laboratory, Department of Microbiology, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India
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Chen B, Miller ME, Gross RA. Effects of porous polystyrene resin parameters on Candida antarctica lipase B adsorption, distribution, and polyester synthesis activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:6467-74. [PMID: 17451255 DOI: 10.1021/la063515y] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Polystyrene resins with varied particle sizes (35 to 350-600 microm) and pore diameters (300-1000 A) were employed to study the effects of immobilization resin particle size and pore diameter on Candida antarctica Lipase B (CALB) loading, distribution within resins, fraction of active sites, and catalytic properties for polyester synthesis. CALB adsorbed rapidly (saturation time </= 4 min) for particle sizes </= 120 microm (pore size = 300 A). Infrared microspectroscopy showed that CALB forms protein loading fronts regardless of resin particle size at similar enzyme loadings ( approximately 8%). From the IR images, the fractions of total surface area available to the enzyme are 21, 33, 35, 37, and 88% for particle sizes 350-600, 120, 75, 35 microm (pore size 300 A), and 35 microm (pore size 1000 A), respectively. Titration with methyl p-nitrophenyl n-hexylphosphate (MNPHP) showed that the fraction of active CALB molecules adsorbed onto resins was approximately 60%. The fraction of active CALB molecules was invariable as a function of resin particle and pore size. At approximately 8% (w/w) CALB loading, by increasing the immobilization support pore diameter from 300 to 1000 A, the turnover frequency (TOF) of epsilon-caprolactone (epsilon-CL) to polyester increased from 12.4 to 28.2 s-1. However, the epsilon-CL conversion rate was not influenced by changes in resin particle size. Similar trends were observed for condensation polymerizations between 1,8-octanediol and adipic acid. The results herein are compared to those obtained with a similar series of methyl methacrylate resins, where variations in particle size largely affected CALB distribution within resins and catalyst activity for polyester synthesis.
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Affiliation(s)
- Bo Chen
- NSF I/UCRC for Biocatalysis and Bioprocessing of Macromolecules, Polytechnic University, 6 Metrotech Center, Brooklyn, New York 11201, USA
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Chen B, Miller EM, Miller L, Maikner JJ, Gross RA. Effects of macroporous resin size on Candida antarctica lipase B adsorption, fraction of active molecules, and catalytic activity for polyester synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:1381-7. [PMID: 17241062 DOI: 10.1021/la062258u] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Methyl methacrylate resins with identical average pore diameter (250 A) and surface area (500 m2/g) but with varied particle size (35 to 560-710 microm) were employed to study how immobilization resin particle size influences Candida antarctica Lipase B (CALB) loading, fraction of active sites, and catalytic properties for polyester synthesis. CALB adsorbed more rapidly on smaller beads. Saturation occurred in less than 30 s and 48 h for beads with diameters 35 and 560-710 microm, respectively. Linearization of adsorption isotherm data by the Scatchard analysis showed for the 35 microm resin that: (i) CALB loading at saturation was well below that required to form a monolayer and fully cover the support surface and (ii) CALB has a high affinity for this resin surface. Infrared microspectroscopy showed that CALB forms protein loading fronts for resins with particle sizes 560-710 and 120 microm. In contrast, CALB appears evenly distributed throughout 35 microm resins. By titration with p-nitrophenyl n-hexyl phosphate (MNPHP), the fraction of active CALB molecules adsorbed onto resins was <50% which was not influenced by particle size. The fraction of active CALB molecules on the 35 microm support increased from 30 to 43% as enzyme loading was increased from 0.9 to 5.7% (w/w) leading to increased activity for epsilon-caprolactone (epsilon-CL) ring-opening polymerization. At about 5% w/w CALB loading, by decreasing the immobilization support diameter from 560-710 to 120, 75, and 35 microm, conversion of epsilon-CL % to polyester increased (20 to 36, 42, and 61%, respectively, at 80 min). Similar trends were observed for condensation polymerizations between 1,8-octanediol and adipic acid.
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Affiliation(s)
- Bo Chen
- NSF Industry/University Cooperative Research Center for Biocatalysis and Bioprocessing of Macromolecules, Polytechnic University, 6 Metrotech Center, Brooklyn, NY 11201, USA
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Abstract
Limited natural resources and an increasing demand for enantiomerically pure compounds render catalysis and especially heterogeneous asymmetric catalysis a key technology. The field has rapidly advanced from the initial use of chiral biopolymers, such as silk, as a support for metal catalysts to the modern research areas. Mesoporous supports, noncovalent immobilization, metal-organic catalysts, chiral modifiers: many areas are rapidly evolving. This Review shows that these catalysts have more to them than facile separation or recycling. Better activities and selectivities can be obtained than with the homogeneous catalyst and novel, efficient reaction mechanisms can be employed. Especially fascinating is the outlook for highly ordered metal-organic catalysts that might allow a rational design, synthesis, and the unequivocal structural characterization to give tailor-made catalysts.
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Affiliation(s)
- Maja Heitbaum
- Philipps-Universität Marburg, Fachbereich Chemie, Hans-Meerwein-Strasse, 35032 Marburg, Germany
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Efficient conversion of CO2 to formic acid by formate dehydrogenase immobilized in a novel alginate–silica hybrid gel. Catal Today 2006. [DOI: 10.1016/j.cattod.2006.02.056] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gao B, Wang X, Shen Y. Studies on characters of immobilizing penicillin G acylase on a novel composite support PEI/SiO2. Biochem Eng J 2006. [DOI: 10.1016/j.bej.2005.10.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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El-Batal A, Atia K, Eid M. Stabilization of α-amylase by using anionic surfactant during the immobilization process. Radiat Phys Chem Oxf Engl 1993 2005. [DOI: 10.1016/j.radphyschem.2004.12.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kim JW, Jung MO, Kim YJ, Ryu JH, Kim J, Chang IS, Lee OS, Suh KD. Stabilization of Enzyme by Exclusive Volume Effect in Hydrophobically Controlled Polymer Microcapsules. Macromol Rapid Commun 2005. [DOI: 10.1002/marc.200500233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Atia KS, El-Arnaouty MB, Ismail SA, Dessouki AM. Characterization and application of immobilized lipase enzyme on different radiation grafted polymeric films: Assessment of the immobilization process using spectroscopic analysis. J Appl Polym Sci 2003. [DOI: 10.1002/app.12620] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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