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Functional, rheological, and antioxidant properties of extracellular polymeric substances produced by a thermophilic cyanobacterium Leptolyngbya sp

2022Journal article Open access
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dc.contributor.authorGongi, Wejdene
dc.contributor.authorCordeiro, Nereida
dc.contributor.authorPinchetti, Juan Luis Gomez
dc.contributor.authorOuada, Hatem Ben
dc.date.accessioned2022-07-05T11:17:33Z
dc.date.available2022-07-05T11:17:33Z
dc.date.issued2022
dc.description.abstractExtracellular polymeric substances (EPSs) produced by the flamentous cyanobacterium identifed as Leptolyngbya sp. IkmLPT16 were isolated and characterized chemically, and their antioxidant, functional, and rheological properties were studied. The strain produces a signifcant amount of EPSs (2.15 g L−1) conjointly with a biomass production achieved at a maximum of 1.35 g L−1 after nine production days. Chemical analysis of EPSs revealed the presence of mannose (35%), arabinose (24%), glucose (15%), rhamnose (2%), and one uronic acid (8%). Fourier transformed infrared spectrum of EPSs further revealed the presence of νC-N groups indicating the presence of peptide moieties. Elemental analysis of EPSs showed the presence of sulfate groups (S=0.59%) as inorganic substituents. Functional properties of Leptolyngbya EPSs were determined based on water holding capacity, oil holding capacity, foaming ability, and metal sorption ability. Experimental results showed high water holding capacity (119%), water solubility index (97.43%), and oil holding ability (87.52%), with a strong metal sorption ability and consequent foam stability (22%). The rheological properties of EPSs were comparable with commercial xanthan gum with higher resistance to Temperature. Leptolyngbya sp. EPSs displayed an efective antioxidant activity via directly scavenging free radicals particularly DDPH• (IC50=4 mg. mL−1 against 10 mg. mL−1 for l-ascorbic acid) and •OH (IC50=10 mg. mL−1 against 20 mg. mL−1 for l-ascorbic acid) and as an iron-chelating agent (IC50=40 mg. mL−1 against 60 mg.mL−1 for EDTA). The outcomes of this study demonstrate the potential use of Leptolyngbya sp. EPSs in several food and pharmaceutical applications.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGongi, W., Cordeiro, N., Pinchetti, J. L. G., & Ouada, H. B. (2022). Functional, rheological, and antioxidant properties of extracellular polymeric substances produced by a thermophilic cyanobacterium Leptolyngbya sp. Journal of Applied Phycology, 34(3), 1423-1434.pt_PT
dc.identifier.doi10.1007/s10811-022-02695-1pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4362
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectExtracellular polymeric substancespt_PT
dc.subjectLeptolyngbyapt_PT
dc.subjectCyanobacteriapt_PT
dc.subjectCompositionpt_PT
dc.subjectFunctional propertypt_PT
dc.subjectRheologypt_PT
dc.subjectAntioxidant propertypt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleFunctional, rheological, and antioxidant properties of extracellular polymeric substances produced by a thermophilic cyanobacterium Leptolyngbya sppt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1434pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage1423pt_PT
oaire.citation.titleJournal of Applied Phycologypt_PT
oaire.citation.volume34pt_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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