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Acerola's pectin methylesterase: studies of heat inactivation

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dc.contributor.authorde Assis, S. A.
dc.contributor.authorLima, D. C.
dc.contributor.authorOliveira, OMMD
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:24:02Z
dc.date.available2014-05-20T15:24:02Z
dc.date.issued2000-12-01
dc.description.abstractThe effect of temperature on the activity of acerola's pectin methylesterase (PME) was studied to determine its heat-inactivation. The acerola's pectin methylesterase (PME; EC: 3.1.1.11) is very stable at 50 degrees C (10% loss of activity in 100 min) and needed 110 min for its inactivation at 98 degrees C. These values are much higher than the ones required for inactivation of the citrus PME, that has been reported as being equal to 1 min at 90 degrees C. Heat-inactivation of PME was shown to be nonlinear, suggesting the presence of fractions of PME with differing heat-stabilities. The times to inactive the enzyme at 98, 102 and 106 degrees C were 110, 10 and 2.17 min, respectively. The Z value (the rise in temperature necessary to observe a ten times faster heat-inactivation) was 4.71 degrees C. (C) 2000 Elsevier B.V. Ltd. All rights reserved.en
dc.description.affiliationUNESP, Dept Bioquim & Tecnol Quim, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Bioquim & Tecnol Quim, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent465-467
dc.identifierhttp://dx.doi.org/10.1016/S0308-8146(00)00173-4
dc.identifier.citationFood Chemistry. Oxford: Elsevier B.V., v. 71, n. 4, p. 465-467, 2000.
dc.identifier.doi10.1016/S0308-8146(00)00173-4
dc.identifier.issn0308-8146
dc.identifier.urihttp://hdl.handle.net/11449/34692
dc.identifier.wosWOS:000089806400007
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofFood Chemistry
dc.relation.ispartofjcr4.946
dc.relation.ispartofsjr1,793
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectpectin methylesterasept
dc.subjectinactivation enzymept
dc.subjectacerolapt
dc.titleAcerola's pectin methylesterase: studies of heat inactivationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQpt

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Araraquara - IQAR - Instituto de Química