Repository logo
 
Publication

Combined effects of temperature, pH and water activity on predictive ability of microbial kinetic inactivation model

2015Conference object Restricted access
Simple item page
dc.contributor.authorGil, Maria M.
dc.contributor.authorMiller, Fátima A.
dc.contributor.authorBrandão, Teresa R. S.
dc.contributor.authorSilva, Cristina L. M.
dc.date.accessioned2016-04-20T15:24:59Z
dc.date.available2016-04-20T15:24:59Z
dc.date.issued2015
dc.description.abstractIt is well known that temperature is the key factor controlling the microbial survival/inactivation. However, the interactive effects of further stressing environmental conditions may influence microbial inactivation behaviour. The objective of this work was to include, in the inactivation model, temperature, pH and water activity effects using a black box polynomial model, aiming at accurate prediction. Experimental data of Listeria innocua obtained within the temperature range of 52.5 and 65.0 °C, pH of 4.5, 6.0 and 7.5, and water activity of 0.95 and 0.99 were used for model assessment. A Gompertz-inspired model for microbial inactivation was used, with shoulder period, maximum inactivation rate and tail as parameters. The relations of such parameters with temperature, water activity and pH were purely empirical and assumed to be polynomials. When these mathematical relationships were included in the primary kinetic model, accurate predictions of the inactivation data were attained, thus validating the predictive ability of the model expressed in terms of the stressing environmental factors studied. © 2015 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of Department of Food Science, Faculty of Food Engineering, University of Campinas.pt_PT
dc.identifier.citationGIL, Maria M.; MILLER, Fátima A.; Brandão, Teresa R. S.; SILVA, Cristina L.M. - Combined effects of temperature, pH and water activity on predictive ability of microbial kinetic inactivation model. In 9th International Conference on Predictive Modelling in Food, Rio de Janeiro, Brazil. 8-12 Setembro, 2015. – In Procedia Food Science. ISSN 2211-601X. (2015), 4 p.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.14/19821
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectMaximum inactivation ratept_PT
dc.subjectShoulder parameterpt_PT
dc.subjectTailpt_PT
dc.subjectTemperaturept_PT
dc.subjectpH and water activity effectspt_PT
dc.subjectPolynomial functions.pt_PT
dc.titleCombined effects of temperature, pH and water activity on predictive ability of microbial kinetic inactivation modelpt_PT
dc.typeconference object
dspace.entity.typePublication
person.familyNameGil
person.familyNameMiller
person.familyNameBrandão
person.familyNameSilva
person.givenNameMaria M
person.givenNameFatima
person.givenNameTeresa
person.givenNameCristina
person.identifierG-5364-2013
person.identifierJ-9418-2012
person.identifier1473674
person.identifier.ciencia-id7313-A289-DF48
person.identifier.ciencia-id3A17-0386-6C1B
person.identifier.ciencia-id7B19-E23B-BB31
person.identifier.ciencia-id6611-634A-132C
person.identifier.orcid0000-0002-8008-9839
person.identifier.orcid0000-0002-3715-6231
person.identifier.orcid0000-0002-8857-6471
person.identifier.orcid0000-0002-0495-3955
person.identifier.ridG-5364-2013
person.identifier.ridJ-9418-2012
person.identifier.ridA-3568-2013
person.identifier.scopus-author-id12785024700
person.identifier.scopus-author-id15056315100
person.identifier.scopus-author-id6602174128
person.identifier.scopus-author-id7201387397
rcaap.rightsrestrictedAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication4f6589c9-9aa0-4191-b49f-4ee4d2949822
relation.isAuthorOfPublicationc6abba4e-b0bc-44f8-a58e-e7e71e8ed9b0
relation.isAuthorOfPublicationebf7ead0-3772-4fd6-988c-f6b8722de84e
relation.isAuthorOfPublication4e2903de-0679-4cb1-981e-10de14c0c995
relation.isAuthorOfPublication.latestForDiscoveryc6abba4e-b0bc-44f8-a58e-e7e71e8ed9b0

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Combined effects of temperature, pH and water activity on predictive ability of microbial kinetic inactivation model.pdf
Size:
361.88 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.44 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CBQF - Contribuições em Revistas Científicas / Contribution to Journals