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Extracellular polymeric substances with high radical scavenging ability produced in outdoor cultivation of the thermotolerant chlorophyte Graesiella sp

2020Journal article Open access
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dc.contributor.authorGongi, Wejdene
dc.contributor.authorCordeiro, Nereida
dc.contributor.authorPinchetti, Juan Luis Gomez
dc.contributor.authorSadok, Saloua
dc.contributor.authorBen Ouada, Hatem
dc.date.accessioned2021-04-13T13:37:21Z
dc.date.available2021-04-13T13:37:21Z
dc.date.issued2020
dc.description.abstractThe present study developed a two-step strategy to enhance the production of extracellular polymeric substances (EPSs) by a thermotolerant chlorophyte, Graesiella sp., in view to their industrial valorisation. In the first step, Graesiella sp. was grown in outdoor conditions in pilot-scale photobioreactors of 100 L culture volumes. In the second step, the biomass collected in the exponential growth phase was submitted to heat stress (50 °C). A joint production of biomass reaching 0.50 gdw L−1 day−1 and of EPS production reaching 1.30 gdw L−1 in 2 days was obtained. EPSs mainly contained polysaccharides (80%) and proteins (14%). FTIR and 1HNMR revealed the presence of primary amine and sulfated groups. The EPSs contained antioxidant enzymes (SOD, CAT, and APX) maintained in an active state by the microenvironment offered by the EPSs. The EPSs were found to have a potent antioxidant activity via directly scavenging free radicals when compared to L-ascorbic acid.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGongi, W., Cordeiro, N., Pinchetti, J. L. G., Sadok, S., & Ouada, H. B. (2021). Extracellular polymeric substances with high radical scavenging ability produced in outdoor cultivation of the thermotolerant chlorophyte Graesiella sp. Journal of Applied Phycology, 33(1), 357-369.pt_PT
dc.identifier.doi10.1007/s10811-020-02303-0pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3281
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMicroalgaept_PT
dc.subjectGraesiellapt_PT
dc.subjectChlorophytapt_PT
dc.subjectEPSspt_PT
dc.subjectAntioxidant enzymespt_PT
dc.subjectCharacterizationpt_PT
dc.subjectRadical scavengingpt_PT
dc.subjectOutdoor cultivationpt_PT
dc.subjectTwo-step strategypt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleExtracellular polymeric substances with high radical scavenging ability produced in outdoor cultivation of the thermotolerant chlorophyte Graesiella sppt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage369pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage357pt_PT
oaire.citation.titleJournal of Applied Phycologypt_PT
oaire.citation.volume33pt_PT
person.familyNamecordeiro
person.givenNamenereida
person.identifier1612636
person.identifier.ciencia-id521A-0F62-EA39
person.identifier.orcid0000-0001-6006-3415
person.identifier.ridO-2253-2019
person.identifier.scopus-author-id7004319456
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3d02b657-c48c-4f56-813a-1284b81960f3
relation.isAuthorOfPublication.latestForDiscovery3d02b657-c48c-4f56-813a-1284b81960f3

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