Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.14/6565 |
Resumo: | The thermal inactivation kinetics of freeze-dried á-amylase in a solid matrix was studied at water contents ranging from 1.5 to 23.9 g water per 100 g dry solid. These conditions were obtained by equilibration in dry environments, with water activities ranging between 0.11 and 0.88. Isothermal inactivation experiments in the range 135 to 150 °C were performed. Results were analysed with both the Bigelow and Arrhenius models. It was concluded that there was no statistical significance to suggest that the water content influenced the kinetic parameters. An activation energy of 128 kJ/mol and pre-exponential factor with a logarithm of 33.9 described all the results well. |
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spelling |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contentsThe thermal inactivation kinetics of freeze-dried á-amylase in a solid matrix was studied at water contents ranging from 1.5 to 23.9 g water per 100 g dry solid. These conditions were obtained by equilibration in dry environments, with water activities ranging between 0.11 and 0.88. Isothermal inactivation experiments in the range 135 to 150 °C were performed. Results were analysed with both the Bigelow and Arrhenius models. It was concluded that there was no statistical significance to suggest that the water content influenced the kinetic parameters. An activation energy of 128 kJ/mol and pre-exponential factor with a logarithm of 33.9 described all the results well.ElsevierVeritati - Repositório Institucional da Universidade Católica PortuguesaSaraiva, J.Oliveira, J. C.Hendrickx, M.Oliveira, F. A. R.Tobback, P.2011-10-20T18:21:56Z19961996-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.14/6565engSARAIVA, J. [et al.] - Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents. LWT- Food Science and Technology. ISSN 0023-6438. 29:3 (1996) 260-26610.1006/fstl.1996.0038info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-12T17:10:59Zoai:repositorio.ucp.pt:10400.14/6565Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:06:06.238849Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
title |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
spellingShingle |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents Saraiva, J. |
title_short |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
title_full |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
title_fullStr |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
title_full_unstemmed |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
title_sort |
Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents |
author |
Saraiva, J. |
author_facet |
Saraiva, J. Oliveira, J. C. Hendrickx, M. Oliveira, F. A. R. Tobback, P. |
author_role |
author |
author2 |
Oliveira, J. C. Hendrickx, M. Oliveira, F. A. R. Tobback, P. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Veritati - Repositório Institucional da Universidade Católica Portuguesa |
dc.contributor.author.fl_str_mv |
Saraiva, J. Oliveira, J. C. Hendrickx, M. Oliveira, F. A. R. Tobback, P. |
description |
The thermal inactivation kinetics of freeze-dried á-amylase in a solid matrix was studied at water contents ranging from 1.5 to 23.9 g water per 100 g dry solid. These conditions were obtained by equilibration in dry environments, with water activities ranging between 0.11 and 0.88. Isothermal inactivation experiments in the range 135 to 150 °C were performed. Results were analysed with both the Bigelow and Arrhenius models. It was concluded that there was no statistical significance to suggest that the water content influenced the kinetic parameters. An activation energy of 128 kJ/mol and pre-exponential factor with a logarithm of 33.9 described all the results well. |
publishDate |
1996 |
dc.date.none.fl_str_mv |
1996 1996-01-01T00:00:00Z 2011-10-20T18:21:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.14/6565 |
url |
http://hdl.handle.net/10400.14/6565 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
SARAIVA, J. [et al.] - Analysis of the inactivation kinetics of freeze-dried á-amylase from bacillus amyloliquefaciens at different moisture contents. LWT- Food Science and Technology. ISSN 0023-6438. 29:3 (1996) 260-266 10.1006/fstl.1996.0038 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131727215460352 |