ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300364 |
Resumo: | The objective of this work was the immobilization of the enzyme Candida antarctica lipase B (CAL B) using the sol-gel method of immobilization and three different initiators of the polymerization reaction: one acid (HCl), one basic (NH4OH) and the other nucleophilic (HBr). Tetraethylorthosilicate was used as the silica precursor. The influence of the additive PEG 1500 on immobilization was assessed. The efficiency of the process was evaluated considering the esterification activity of the xerogels. The immobilization process provided enhanced thermal stability, storage and operational aspects relative to the free enzyme. Storage temperature proved one of the main variables to be considered in the process, with the xerogels stored under refrigeration showing better results in terms of residual activity (nearly 200 days with ≥ 90% residual activity of basic and nucleophilic xerogels) when compared with storage at ambient temperature (nearly 40 days). The results demonstrated the possibility of reuse of derivatives and a greater number of cycles (nine), considering a residual activity of 50%. |
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Química Nova (Online) |
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ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GELimmobilizationlipasesol-gelPEG 1500esterificationThe objective of this work was the immobilization of the enzyme Candida antarctica lipase B (CAL B) using the sol-gel method of immobilization and three different initiators of the polymerization reaction: one acid (HCl), one basic (NH4OH) and the other nucleophilic (HBr). Tetraethylorthosilicate was used as the silica precursor. The influence of the additive PEG 1500 on immobilization was assessed. The efficiency of the process was evaluated considering the esterification activity of the xerogels. The immobilization process provided enhanced thermal stability, storage and operational aspects relative to the free enzyme. Storage temperature proved one of the main variables to be considered in the process, with the xerogels stored under refrigeration showing better results in terms of residual activity (nearly 200 days with ≥ 90% residual activity of basic and nucleophilic xerogels) when compared with storage at ambient temperature (nearly 40 days). The results demonstrated the possibility of reuse of derivatives and a greater number of cycles (nine), considering a residual activity of 50%.Sociedade Brasileira de Química2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300364Química Nova v.38 n.3 2015reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0100-4042.20150027info:eu-repo/semantics/openAccessFicanha,Aline Matuella MoreiraNyari,Nádia Ligianara D.Levandoski,KatarineMignoni,Marcelo LuisDallago,Rogério Marcospor2015-05-12T00:00:00Zoai:scielo:S0100-40422015000300364Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2015-05-12T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
title |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
spellingShingle |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL Ficanha,Aline Matuella Moreira immobilization lipase sol-gel PEG 1500 esterification |
title_short |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
title_full |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
title_fullStr |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
title_full_unstemmed |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
title_sort |
ESTUDO DA IMOBILIZAÇÃO DE LIPASE EM SÍLICA OBTIDA PELA TÉCNICA SOL-GEL |
author |
Ficanha,Aline Matuella Moreira |
author_facet |
Ficanha,Aline Matuella Moreira Nyari,Nádia Ligianara D. Levandoski,Katarine Mignoni,Marcelo Luis Dallago,Rogério Marcos |
author_role |
author |
author2 |
Nyari,Nádia Ligianara D. Levandoski,Katarine Mignoni,Marcelo Luis Dallago,Rogério Marcos |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ficanha,Aline Matuella Moreira Nyari,Nádia Ligianara D. Levandoski,Katarine Mignoni,Marcelo Luis Dallago,Rogério Marcos |
dc.subject.por.fl_str_mv |
immobilization lipase sol-gel PEG 1500 esterification |
topic |
immobilization lipase sol-gel PEG 1500 esterification |
description |
The objective of this work was the immobilization of the enzyme Candida antarctica lipase B (CAL B) using the sol-gel method of immobilization and three different initiators of the polymerization reaction: one acid (HCl), one basic (NH4OH) and the other nucleophilic (HBr). Tetraethylorthosilicate was used as the silica precursor. The influence of the additive PEG 1500 on immobilization was assessed. The efficiency of the process was evaluated considering the esterification activity of the xerogels. The immobilization process provided enhanced thermal stability, storage and operational aspects relative to the free enzyme. Storage temperature proved one of the main variables to be considered in the process, with the xerogels stored under refrigeration showing better results in terms of residual activity (nearly 200 days with ≥ 90% residual activity of basic and nucleophilic xerogels) when compared with storage at ambient temperature (nearly 40 days). The results demonstrated the possibility of reuse of derivatives and a greater number of cycles (nine), considering a residual activity of 50%. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300364 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000300364 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.5935/0100-4042.20150027 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Química Nova v.38 n.3 2015 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318116677615616 |