Lipases
Mostrando 13-24 de 315 artigos, teses e dissertações.
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13. Easy and Simple SiO2 Immobilization of Lipozyme CaLB-L: Its Use as a Catalyst in Acylation Reactions and Comparison with Other Lipases
In this study, lipase from Candida antarctica B (Lipozyme CaLB-L) was successfully immobilized on SiO2 through adsorption and used to obtain (R)-(+)-esters derived from (R,S)-1-phenylethanol. The new immobilized enzyme was compared with commercially immobilized lipases (Novozyme 435, Lipozyme 435 and Pseudomonas cepacia (PSC-II and PSD-I)). Lipozyme CaLB-L a
J. Braz. Chem. Soc.. Publicado em: 2017-07
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14. Performance of Chitosan/Glycerol Phosphate Hydrogel as a Support for Lipase Immobilization
A biocompatible and biodegradable hybrid chitosan/glycerol phosphate hydrogel (CS-GP) was prepared and evaluated as support for enzyme immobilization. In this work a lipase sn-1,3 specific from Rhizopus oryzae was physically immobilized in CS-GP by adsorption (PA) and in CS-GP modified chemically with glutaraldehyde (CS-GP-GA) by covalent attachment (CA). Th
Mat. Res.. Publicado em: 29/06/2017
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15. SELEÇÃO DE ESPÉCIES DO GÊNERO Penicillium PRODUTORAS DE LIPASE LIGADA AO MICÉLIO PARA APLICAÇÃO EM HIDRÓLISE DE ÓLEOS VEGETAIS
Ten species of Penicillium genus isolated from different habitats were evaluated as mycelium bound lipase producers to be used in the hydrolysis of vegetable oils. Using olive oil as an inducer three species (P. italicum AT4421, P. janthinellum CCT3162 and P. purpurogenum AT2008) were able to produce lipases having high mycelium bound activities (>150 U g-1)
Quím. Nova. Publicado em: 2017-05
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16. Bacterial selection for biological control of plant disease: criterion determination and validation
Abstract This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes
Braz. J. Microbiol.. Publicado em: 2017-03
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17. Methacrylated Chitosan Based UV Curable Support for Enzyme Immobilization
UV curing is simple, fast and effective procedure for enzyme immobilization with minimized enzymatic activity. UV-curable methacrylated chitosan is here proposed as a support material for immobilization of lipase. The morphology of the polymeric support was characterized by scanning electron microscopy (SEM). Both covalently (CIL) and physically (PIL) immobi
Mat. Res.. Publicado em: 16/02/2017
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18. POTENCIAL CATALÍTICO DE LIPASES LIGADAS AO MICÉLIO DE FUNGOS FILAMENTOSOS EM PROCESSOS DE BIOTRANSFORMAÇÃO
Over the past decades, mycelium-bound lipase of filamentous fungus has been extensively studied as an alternative biocatalyst in biotransformation processes. Mycelium-bound lipase can be used directly as suspended free cells or immobilized within biomass support particles as whole cells biocatalyst. In the latter, cells can be immobilized in situ or extra si
Quím. Nova. Publicado em: 2017-01
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19. The Influence of Organic Medium and Supports in the Resolution of (R,S)-Menthol Catalyzed by Lipases
In this study, various commercial and native lipases, free or immobilized, were used in the enantioselective resolution of (R,S)-menthol with vinyl acetate for the preparation of menthyl acetate. Lipase from Candida rugosa (AYL) was found to be the most appropriate. When the reaction was carried out at 35 ºC, using 40 mg of AYL and a molar ratio of 1:2 (alc
J. Braz. Chem. Soc.. Publicado em: 2016-12
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20. Synthesis of structured triacylglycerols enriched in n-3 fatty acids by immobilized microbial lipase
Abstract The search for new biocatalysts has aroused great interest due to the variety of micro-organisms and their role as enzyme producers. Native lipases from Aspergillus niger and Rhizopus javanicus were used to enrich the n-3 long-chain polyunsaturated fatty acids content in the triacylglycerols of soybean oil by acidolysis with free fatty acids from sa
Braz. J. Microbiol.. Publicado em: 2016-12
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21. Process optimization for production and purification of a thermostable, organic solvent tolerant lipase from Acinetobacter sp. AU07
ABSTRACT The purpose of this study was to isolate, purify and optimize the production conditions of an organic solvent tolerant and thermostable lipase from Acinetobacter sp. AU07 isolated from distillery waste. The lipase production was optimized by response surface methodology, and a maximum production of 14.5 U/mL was observed at 30 ºC and pH 7, using a
Braz. J. Microbiol.. Publicado em: 2016-09
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22. Bioprospecting of lipolytic microorganisms obtained from industrial effluents
Resumo As lipases têm a capacidade de catalisar diversas reações e são importantes em diferentes aplicações biotecnológicas. Este trabalho teve como objetivo isolar e caracterizar microrganismos produtores de lipases, provenientes de diferentes efluentes de indústrias alimentícias da região de Pelotas, RS. As bactérias foram identificadas quanto �
An. Acad. Bras. Ciênc.. Publicado em: 18/08/2016
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23. Isolamento e seleção de fungos produtores de lipases com base na atividade lipásica e no potencial hidrolítico sobre óleo comestível de soja e escuma de caixa de gordura
RESUMO: O uso de biomassa fúngica como biocatalisadora lipásica representa uma atraente abordagem para o tratamento de águas residuais oleosas e produção de biodiesel, a partir de óleos e graxas residuais, devido à sua maior estabilidade, possibilidade de reuso e baixo custo. Neste trabalho foram obtidos cem isolados de fungos, a partir de escumas de
Eng. Sanit. Ambient.. Publicado em: 18/07/2016
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24. Surface response methodology for the optimization of lipase production under submerged fermentation by filamentous fungi
Abstract A Plackett–Burman Factorial Design of 16 experiments was conducted to assess the influence of nine factors on the production of lipases by filamentous fungi. The factors investigated were bran type (used as the main carbon source), nitrogen source, nitrogen source concentration, inducer, inducer concentration, fungal strain (Aspergillus niger or A
Braz. J. Microbiol.. Publicado em: 2016-06