Repository logo
 
Publication

Ultrasound and heat treatment effects on Staphylococcus aureus cell viability in orange juice

2021-10Journal article Open access
Simple item page
dc.contributor.authorTahi, Akila Amir
dc.contributor.authorSousa, Sérgio
dc.contributor.authorMadani, Khodir
dc.contributor.authorSilva, Cristina L. M.
dc.contributor.authorMiller, Fátima A.
dc.date.accessioned2021-09-20T10:53:59Z
dc.date.available2021-09-20T10:53:59Z
dc.date.issued2021-10
dc.description.abstractUltrasounds are being considered an excellent alternative technology in juice preservation. Yet, when combined with heat treatment, the process seems to be further intensified. This work aimed to evaluate and compare the impact of ultrasounds and heat treatments, when applied alone or in combination, on Staphylococcus aureus survival in orange juice. Inoculated commercial pasteurized orange juice was treated at different times at 20, 30, 40, 50 and 60 °C. SEM analyses were applied to identify morphological changes in S. aureus cells appearance. The microbial inactivation data were fitted using two mathematical models, depending on the behaviour observed. Sonication at 20, 30, and 40 °C induced 4.02 ± 0.52, 3.80 ± 0.49 and 4.30 ± 0.74 log cycles reduction of S. aureus after treatments of 90, 60 and 60 min, respectively. The heat treatments at the same temperatures had no impact on S. aureus survival. When 50 and 60 °C were applied, more than 5-log reductions were attained for both thermosonication and heat treatments alone. A synergistic effect was observed between sonication and high temperatures. At 50 °C, the thermosonication reduced the treatment time from 60 to 35 min and the microbial load from 5.14 ± 0.08 to 10.76 ± 0.28 log cycles reduction, compared to heat treatment alone. Results from SEM images showed that cells undergo membrane damage during sonication exposure. This was observed by collapsed cells, cell disruption, and holes in the cell's membrane. Thermosonication proved to be a viable alternative to thermal pasteurization of orange juice since milder treatments can be safely applied, improving the final product quality.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ultsonch.2021.105743pt_PT
dc.identifier.eid85114769410
dc.identifier.issn1350-4177
dc.identifier.pmcPMC8445896
dc.identifier.pmid34525437
dc.identifier.urihttp://hdl.handle.net/10400.14/34993
dc.identifier.wos000701993300002
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCell damagept_PT
dc.subjectHeat treatmentpt_PT
dc.subjectKinetic inactivation modellingpt_PT
dc.subjectStaphylococcus aureuspt_PT
dc.subjectThermosonicationpt_PT
dc.subjectUltrasoundpt_PT
dc.titleUltrasound and heat treatment effects on Staphylococcus aureus cell viability in orange juicept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleUltrasonics Sonochemistrypt_PT
oaire.citation.volume78pt_PT
person.familyNameSousa
person.familyNameMadani
person.familyNameSilva
person.familyNameMiller
person.givenNameSérgio
person.givenNameKhodir
person.givenNameCristina
person.givenNameFatima
person.identifier1473674
person.identifierG-5364-2013
person.identifier.ciencia-idF11D-362D-1EFD
person.identifier.ciencia-id6611-634A-132C
person.identifier.ciencia-id3A17-0386-6C1B
person.identifier.orcid0000-0001-6205-1266
person.identifier.orcid0000-0001-5356-6890
person.identifier.orcid0000-0002-0495-3955
person.identifier.orcid0000-0002-3715-6231
person.identifier.ridA-3568-2013
person.identifier.ridG-5364-2013
person.identifier.scopus-author-id55649569791
person.identifier.scopus-author-id25923554600
person.identifier.scopus-author-id7201387397
person.identifier.scopus-author-id15056315100
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4869c73d-b4fd-45ff-88fa-8ecde60f5ca0
relation.isAuthorOfPublication4e7db2a3-ccbc-4289-b4a1-ff9b5f4c7764
relation.isAuthorOfPublication4e2903de-0679-4cb1-981e-10de14c0c995
relation.isAuthorOfPublicationc6abba4e-b0bc-44f8-a58e-e7e71e8ed9b0
relation.isAuthorOfPublication.latestForDiscovery4e2903de-0679-4cb1-981e-10de14c0c995

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
38225132.pdf
Size:
2.07 MB
Format:
Adobe Portable Document Format
Download

Collections

CBQF - Contribuições em Revistas Científicas / Contribution to Journals