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Kinetic parameters estimation for ascorbic acid degradation in fruit nectar using the partial equivalent isothermal exposures (PEIE) method under non-isothermal continuous heating conditions

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dc.contributor.authorVieira, M. M. C.
dc.contributor.authorTeixeira, A. A.
dc.contributor.authorSilva, C. L. M.
dc.date.accessioned2015-12-07T11:04:36Z
dc.date.available2015-12-07T11:04:36Z
dc.date.issued2001
dc.description.abstractWith the purpose of testing the Paired Equivalent Isothermal Exposures (PEIE) method to determine reaction kinetic parameters under non-isothermal conditions, continuous pasteurizations were carried out with a tropical fruit nectar [25% cupuacu (Theobroma grandiflorum) pulp and 15% sugar] to estimate the ascorbic acid thermal degradation kinetic parameters. Fifteen continuous thermal exposures were studied, with seven being cycled. The experimental ascorbic acid thermal degradation kinetic parameters were estimated by the PEIE method (E-a = 73 +/- 9 kJ/mol, k(80 degreesC) = 0.017 +/- 0.001 min(-1)). These values compared very well to the previously determined values for the same product under isothermal conditions (E-a = 73 +/- 7 kJ/mol, k(80 degreesC) = 0.020 +/- 0.001 min(-1)). The predicted extents of reaction presented a good fit to the experimental data, although the cycled thermal treatments presented some deviation. In addition to being easier and faster than the Isothermal method, the PEIE method can be a more reliable method to estimate first-order reaction kinetic parameters when continuous heating is considered.
dc.identifier.doihttps://dx.doi.org/10.1021/bp000132w
dc.identifier.issn8756-7938
dc.identifier.urihttp://hdl.handle.net/10400.1/7319
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAmerican Chemical Society and American Institute of Chemical Engineers
dc.relation.isbasedonP-000-WTP
dc.titleKinetic parameters estimation for ascorbic acid degradation in fruit nectar using the partial equivalent isothermal exposures (PEIE) method under non-isothermal continuous heating conditions
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage181
oaire.citation.startPage175
oaire.citation.titleBiotechnology Progress
oaire.citation.volume17
person.familyNameVieira
person.givenNameMargarida
person.identifier.ciencia-id3314-4EFC-1E4A
person.identifier.orcid0000-0003-2774-706X
person.identifier.ridE-1805-2012
person.identifier.scopus-author-id7202140775
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication338c2b9c-fbe6-4fc1-af2d-8152a6560119
relation.isAuthorOfPublication.latestForDiscovery338c2b9c-fbe6-4fc1-af2d-8152a6560119

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