Optimization of the parameters that affect the synthesis of magnetic copolymer styrene-divinilbezene to be used as efficient matrix for immobilizing lipases

The parameters that effect the synthesis of poly(styrene-co-divinylbenzene) magnetized with magnetite (STY-DVB-M) by polymerization emulsion were assessed in order to obtain magnetic beads to be used as matrix for lipase immobilization. The combined effect of polyvinyl alcohol (PVA) concentration an...

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Veröffentlicht in:World journal of microbiology & biotechnology 2018-11, Vol.34 (11), p.169-12, Article 169
Hauptverfasser: Silva, Mateus V. C., Aguiar, Leandro G., de Castro, Heizir F., Freitas, Larissa
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creator Silva, Mateus V. C.
Aguiar, Leandro G.
de Castro, Heizir F.
Freitas, Larissa
description The parameters that effect the synthesis of poly(styrene-co-divinylbenzene) magnetized with magnetite (STY-DVB-M) by polymerization emulsion were assessed in order to obtain magnetic beads to be used as matrix for lipase immobilization. The combined effect of polyvinyl alcohol (PVA) concentration and agitation was studied using response surface methodology. A 2 2 full-factorial design was employed for experimental design and analysis of the results. The optimum PVA concentration and agitation were found to be 1 wt% and 400 rpm, respectively. These conditions allow attaining the best particle size distribution of the synthesized particles (80% between 80 and 24 mesh). The performance of the magnetic beads was tested as a matrix for immobilizing two microbial lipases (Lipases from Burkholderia cepacia- BCL and Pseudomonas fluorescens- AKL) by physical adsorption and high immobilization yields (> 70%) and hydrolytic activities (≅ 1850 U g −1 ) were attained. The properties of free and immobilized lipases were searched and compared. Similar performance regarding the analyzed parameters (biochemical properties, kinetic constants and thermal stability) were obtained. Moreover, both immobilized lipases were found to be able to catalyze the transesterification of coconut oil with ethanol to produce fatty acid ethyl esters (FAEE). Further study showed that the B. cepacia immobilized lipase could be used seven times without significant decrease of activity, revealing half-life time of 970 h. Graphical abstract
doi_str_mv 10.1007/s11274-018-2553-1
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C. ; Aguiar, Leandro G. ; de Castro, Heizir F. ; Freitas, Larissa</creator><creatorcontrib>Silva, Mateus V. C. ; Aguiar, Leandro G. ; de Castro, Heizir F. ; Freitas, Larissa</creatorcontrib><description>The parameters that effect the synthesis of poly(styrene-co-divinylbenzene) magnetized with magnetite (STY-DVB-M) by polymerization emulsion were assessed in order to obtain magnetic beads to be used as matrix for lipase immobilization. The combined effect of polyvinyl alcohol (PVA) concentration and agitation was studied using response surface methodology. A 2 2 full-factorial design was employed for experimental design and analysis of the results. The optimum PVA concentration and agitation were found to be 1 wt% and 400 rpm, respectively. These conditions allow attaining the best particle size distribution of the synthesized particles (80% between 80 and 24 mesh). The performance of the magnetic beads was tested as a matrix for immobilizing two microbial lipases (Lipases from Burkholderia cepacia- BCL and Pseudomonas fluorescens- AKL) by physical adsorption and high immobilization yields (&gt; 70%) and hydrolytic activities (≅ 1850 U g −1 ) were attained. The properties of free and immobilized lipases were searched and compared. Similar performance regarding the analyzed parameters (biochemical properties, kinetic constants and thermal stability) were obtained. Moreover, both immobilized lipases were found to be able to catalyze the transesterification of coconut oil with ethanol to produce fatty acid ethyl esters (FAEE). Further study showed that the B. cepacia immobilized lipase could be used seven times without significant decrease of activity, revealing half-life time of 970 h. 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C.</creatorcontrib><creatorcontrib>Aguiar, Leandro G.</creatorcontrib><creatorcontrib>de Castro, Heizir F.</creatorcontrib><creatorcontrib>Freitas, Larissa</creatorcontrib><title>Optimization of the parameters that affect the synthesis of magnetic copolymer styrene-divinilbezene to be used as efficient matrix for immobilizing lipases</title><title>World journal of microbiology &amp; biotechnology</title><addtitle>World J Microbiol Biotechnol</addtitle><addtitle>World J Microbiol Biotechnol</addtitle><description>The parameters that effect the synthesis of poly(styrene-co-divinylbenzene) magnetized with magnetite (STY-DVB-M) by polymerization emulsion were assessed in order to obtain magnetic beads to be used as matrix for lipase immobilization. The combined effect of polyvinyl alcohol (PVA) concentration and agitation was studied using response surface methodology. A 2 2 full-factorial design was employed for experimental design and analysis of the results. The optimum PVA concentration and agitation were found to be 1 wt% and 400 rpm, respectively. These conditions allow attaining the best particle size distribution of the synthesized particles (80% between 80 and 24 mesh). The performance of the magnetic beads was tested as a matrix for immobilizing two microbial lipases (Lipases from Burkholderia cepacia- BCL and Pseudomonas fluorescens- AKL) by physical adsorption and high immobilization yields (&gt; 70%) and hydrolytic activities (≅ 1850 U g −1 ) were attained. The properties of free and immobilized lipases were searched and compared. Similar performance regarding the analyzed parameters (biochemical properties, kinetic constants and thermal stability) were obtained. Moreover, both immobilized lipases were found to be able to catalyze the transesterification of coconut oil with ethanol to produce fatty acid ethyl esters (FAEE). Further study showed that the B. cepacia immobilized lipase could be used seven times without significant decrease of activity, revealing half-life time of 970 h. 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C.</au><au>Aguiar, Leandro G.</au><au>de Castro, Heizir F.</au><au>Freitas, Larissa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optimization of the parameters that affect the synthesis of magnetic copolymer styrene-divinilbezene to be used as efficient matrix for immobilizing lipases</atitle><jtitle>World journal of microbiology &amp; biotechnology</jtitle><stitle>World J Microbiol Biotechnol</stitle><addtitle>World J Microbiol Biotechnol</addtitle><date>2018-11-01</date><risdate>2018</risdate><volume>34</volume><issue>11</issue><spage>169</spage><epage>12</epage><pages>169-12</pages><artnum>169</artnum><issn>0959-3993</issn><eissn>1573-0972</eissn><abstract>The parameters that effect the synthesis of poly(styrene-co-divinylbenzene) magnetized with magnetite (STY-DVB-M) by polymerization emulsion were assessed in order to obtain magnetic beads to be used as matrix for lipase immobilization. The combined effect of polyvinyl alcohol (PVA) concentration and agitation was studied using response surface methodology. A 2 2 full-factorial design was employed for experimental design and analysis of the results. The optimum PVA concentration and agitation were found to be 1 wt% and 400 rpm, respectively. These conditions allow attaining the best particle size distribution of the synthesized particles (80% between 80 and 24 mesh). The performance of the magnetic beads was tested as a matrix for immobilizing two microbial lipases (Lipases from Burkholderia cepacia- BCL and Pseudomonas fluorescens- AKL) by physical adsorption and high immobilization yields (&gt; 70%) and hydrolytic activities (≅ 1850 U g −1 ) were attained. The properties of free and immobilized lipases were searched and compared. Similar performance regarding the analyzed parameters (biochemical properties, kinetic constants and thermal stability) were obtained. Moreover, both immobilized lipases were found to be able to catalyze the transesterification of coconut oil with ethanol to produce fatty acid ethyl esters (FAEE). Further study showed that the B. cepacia immobilized lipase could be used seven times without significant decrease of activity, revealing half-life time of 970 h. Graphical abstract</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><pmid>30406564</pmid><doi>10.1007/s11274-018-2553-1</doi><tpages>12</tpages></addata></record>
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subjects Adsorption
Agitation
Alcohols
Applied Microbiology
Beads
Biocatalysis
Biochemistry
Biochemistry - methods
Biomedical and Life Sciences
Biotechnology
Burkholderia
Burkholderia cepacia - enzymology
Chemical products
Chemical synthesis
Coconut oil
Design of experiments
Divinylbenzene
Emergence Delirium
Emulsion polymerization
Environmental Engineering/Biotechnology
Enzyme Stability
Enzymes, Immobilized - chemistry
Enzymes, Immobilized - metabolism
Esterification
Esters
Ethanol
Ethyl esters
Experimental design
Factorial design
Hydrocarbons
Hydrogen-Ion Concentration
Immobilization
Kinetics
Life Sciences
Lipase
Lipase - chemistry
Lipase - metabolism
Magnetics - methods
Magnetite
Microbiology
Microorganisms
Oil
Original Paper
Parameters
Particle Size
Particle size distribution
Pollutants
Polymerization
Polymers - chemistry
Polymers - metabolism
Polystyrene resins
Polystyrenes - chemistry
Polystyrenes - metabolism
Polyvinyl Alcohol
Pseudomonas fluorescens
Pseudomonas fluorescens - enzymology
Response surface methodology
Size distribution
Stability analysis
Studies
Styrene
Styrenes
Surfactants
Temperature
Thermal stability
Transesterification
title Optimization of the parameters that affect the synthesis of magnetic copolymer styrene-divinilbezene to be used as efficient matrix for immobilizing lipases
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