Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Food Science and Technology (Campinas) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612021000200432 |
Resumo: | Abstract This study evaluated the influence of temperature and β-galactosidase concentration on lactose hydrolysis and on the composition of pasteurized goat milk. Goat milk was pasteurized at 75 °C/15 s and cooled to 10 °C and 30 °C, received 0 (control); 0.04%; 0.07%; 0.20% (v/v) β-galactosidase and was incubated for 5 h, followed by enzymatic inactivation at 85 °C. The hydrolysis degree, pH and acidity were evaluated hourly. Physico-chemical parameters were determined after hydrolysis. The maximum hydrolysis degree (100%) has been reached in 4 h when using 0.07% and 0.20% lactase concentrations at 30 °C; however, the minimum hydrolysis percentage of 70% has been reached at 10 °C for all lactase concentrations tested since 1 h of incubation. The degree of hydrolysis and the total acidity of pasteurized goat milk increased with temperature. Low lactase concentrations resulted in an increase in protein levels, total casein, density, total and defatted dry extract. Therefore, combination of low lactase levels and hydrolysis at 10 °C promoted positive changes in lactose-free pasteurized goat milk. This study was the first reporting the changes resulting from enzymatic hydrolysis in the composition of pasteurized goat milk. |
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Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milkcryoscopic indexlactose intoleranceenzymatic hydrolysiscaprine milkAbstract This study evaluated the influence of temperature and β-galactosidase concentration on lactose hydrolysis and on the composition of pasteurized goat milk. Goat milk was pasteurized at 75 °C/15 s and cooled to 10 °C and 30 °C, received 0 (control); 0.04%; 0.07%; 0.20% (v/v) β-galactosidase and was incubated for 5 h, followed by enzymatic inactivation at 85 °C. The hydrolysis degree, pH and acidity were evaluated hourly. Physico-chemical parameters were determined after hydrolysis. The maximum hydrolysis degree (100%) has been reached in 4 h when using 0.07% and 0.20% lactase concentrations at 30 °C; however, the minimum hydrolysis percentage of 70% has been reached at 10 °C for all lactase concentrations tested since 1 h of incubation. The degree of hydrolysis and the total acidity of pasteurized goat milk increased with temperature. Low lactase concentrations resulted in an increase in protein levels, total casein, density, total and defatted dry extract. Therefore, combination of low lactase levels and hydrolysis at 10 °C promoted positive changes in lactose-free pasteurized goat milk. This study was the first reporting the changes resulting from enzymatic hydrolysis in the composition of pasteurized goat milk.Sociedade Brasileira de Ciência e Tecnologia de Alimentos2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612021000200432Food Science and Technology v.41 n.2 2021reponame:Food Science and Technology (Campinas)instname:Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA)instacron:SBCTA10.1590/fst.05220info:eu-repo/semantics/openAccessARAÚJO,Nkarthe GuerraSILVA,José Barros daMOREIRA,Ricardo TarginoCARDARELLI,Haíssa Robertaeng2021-04-05T00:00:00Zoai:scielo:S0101-20612021000200432Revistahttp://www.scielo.br/ctaONGhttps://old.scielo.br/oai/scielo-oai.php||revista@sbcta.org.br1678-457X0101-2061opendoar:2021-04-05T00:00Food Science and Technology (Campinas) - Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA)false |
dc.title.none.fl_str_mv |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
title |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
spellingShingle |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk ARAÚJO,Nkarthe Guerra cryoscopic index lactose intolerance enzymatic hydrolysis caprine milk |
title_short |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
title_full |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
title_fullStr |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
title_full_unstemmed |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
title_sort |
Effect of temperature and concentration of βeta-galactosidase on the composition of reduced lactose pasteurized goat milk |
author |
ARAÚJO,Nkarthe Guerra |
author_facet |
ARAÚJO,Nkarthe Guerra SILVA,José Barros da MOREIRA,Ricardo Targino CARDARELLI,Haíssa Roberta |
author_role |
author |
author2 |
SILVA,José Barros da MOREIRA,Ricardo Targino CARDARELLI,Haíssa Roberta |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
ARAÚJO,Nkarthe Guerra SILVA,José Barros da MOREIRA,Ricardo Targino CARDARELLI,Haíssa Roberta |
dc.subject.por.fl_str_mv |
cryoscopic index lactose intolerance enzymatic hydrolysis caprine milk |
topic |
cryoscopic index lactose intolerance enzymatic hydrolysis caprine milk |
description |
Abstract This study evaluated the influence of temperature and β-galactosidase concentration on lactose hydrolysis and on the composition of pasteurized goat milk. Goat milk was pasteurized at 75 °C/15 s and cooled to 10 °C and 30 °C, received 0 (control); 0.04%; 0.07%; 0.20% (v/v) β-galactosidase and was incubated for 5 h, followed by enzymatic inactivation at 85 °C. The hydrolysis degree, pH and acidity were evaluated hourly. Physico-chemical parameters were determined after hydrolysis. The maximum hydrolysis degree (100%) has been reached in 4 h when using 0.07% and 0.20% lactase concentrations at 30 °C; however, the minimum hydrolysis percentage of 70% has been reached at 10 °C for all lactase concentrations tested since 1 h of incubation. The degree of hydrolysis and the total acidity of pasteurized goat milk increased with temperature. Low lactase concentrations resulted in an increase in protein levels, total casein, density, total and defatted dry extract. Therefore, combination of low lactase levels and hydrolysis at 10 °C promoted positive changes in lactose-free pasteurized goat milk. This study was the first reporting the changes resulting from enzymatic hydrolysis in the composition of pasteurized goat milk. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
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=S0101-20612021000200432 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612021000200432 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/fst.05220 |
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 Ciência e Tecnologia de Alimentos |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ciência e Tecnologia de Alimentos |
dc.source.none.fl_str_mv |
Food Science and Technology v.41 n.2 2021 reponame:Food Science and Technology (Campinas) instname:Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) instacron:SBCTA |
instname_str |
Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) |
instacron_str |
SBCTA |
institution |
SBCTA |
reponame_str |
Food Science and Technology (Campinas) |
collection |
Food Science and Technology (Campinas) |
repository.name.fl_str_mv |
Food Science and Technology (Campinas) - Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) |
repository.mail.fl_str_mv |
||revista@sbcta.org.br |
_version_ |
1752126328165892096 |