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An integrated characterization of Picea abies industrial bark regarding chemical composition, thermal properties and polar extracts activity

2018Journal article Open access
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dc.contributor.authorNeiva, Duarte M.
dc.contributor.authorAraújo, Solange
dc.contributor.authorGominho, Jorge
dc.contributor.authorCarneiro, Angélica de Cássia
dc.contributor.authorPereira, Helena
dc.date.accessioned2019-01-03T12:44:24Z
dc.date.available2019-01-03T12:44:24Z
dc.date.issued2018
dc.descriptionResearch Articlept_PT
dc.description.abstractThe present work determines the chemical and thermal characteristics as well as the phytochemical and antioxidant potential of the polar extractives of the Picea abies bark from an industrial mill, their wood and bark components and also different bark fractions obtained by mechanical fractionation (fine B1, Φ<0.180 mm, medium B3, 0.450 < Φ<0.850 mm and coarse B6, 2 < Φ<10 mm). The aim is to increase the knowledge on the Picea abies bark to better determine possible uses other than burning for energy production and to test an initial size reduction process to achieve fractions with different characteristics. Compared to wood, bark presented similar lignin (27%), higher mineral (3.9% vs 0.4%) and extractives (20.3% vs 3.8%) and lower polysaccharides (48% vs 71%) contents. Regarding bark fractions the fines showed higher ash (6.3%), extractives (25%) and lignin (29%) than the coarse fraction (3.9%, 19% and 25% respectively). Polysaccharide contents increased with particle size of the bark fractions (38% vs 52% for B1 and B6) but showed the same relative composition. The phytochemical profile of ethanol and water extracts presented higher contents for bark than wood of total phenols (2x higher), flavonoids (3x higher) and tannins (4- 10x higher) with an increasing tendency with particle size. Bark antioxidant activity was higher than that of wood for ferric-reducing antioxidant power (FRAP, 10 vs 6 mmolFe2+/gExt for the ethanol extract) and free radical scavenging activity (DPPH, 6 vs 18 mg/L IC50 for the ethanol extract) methods. The different bark fractions antioxidant activity was very similar. Bark thermal properties showed a much lower volatiles to fixed carbon ratio (V/FC) than wood (3.1 vs 5.2) although the same higher heating value (20.3 MJ/kg). The fractions were quite similar. Bark presented chemical features that point to their possible upgrade, whether by taking advantage of the high extractives with bioactive compounds or the production potential for hemicellulose-derived oligomers with possible use in nutraceutical and pharmaceutical industriespt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNeiva DM, Araujo S, Gominho J, Carneiro AdC, Pereira H (2018) An integrated characterization of Picea abies industrial bark regarding chemical composition, thermal properties and polar extracts activity. PLoS ONE 13 (11): e0208270pt_PT
dc.identifier.doihttps://doi.org/10.1371/journal. pone.0208270pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/16595
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherDavid A. Lightfootpt_PT
dc.relationSUSFOR PROGRAM: SUSTAINABLE FORESTS AND PRODUCTS
dc.relationINNOPELLETS: Increased quality and novel biomass sources of pellets
dc.subjectPicea abiespt_PT
dc.subjectindustrial barkpt_PT
dc.subjectchemical compositionpt_PT
dc.subjectthermal propertiespt_PT
dc.subjectpolar extracts activitypt_PT
dc.titleAn integrated characterization of Picea abies industrial bark regarding chemical composition, thermal properties and polar extracts activitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSUSFOR PROGRAM: SUSTAINABLE FORESTS AND PRODUCTS
oaire.awardTitleINNOPELLETS: Increased quality and novel biomass sources of pellets
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00239%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//PD%2FBD%2F52697%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBPD%2F118743%2F2016/PT
oaire.citation.titlePLoS ONEpt_PT
oaire.fundingStream5876
oaire.fundingStreamOE
person.familyNameAraújo
person.familyNameGominho
person.givenNameSolange
person.givenNameJorge
person.identifierc-OdG5gAAAAJ
person.identifier.ciencia-idE21C-1B36-77F6
person.identifier.orcid0000-0002-6100-5353
person.identifier.orcid0000-0003-3419-6075
person.identifier.ridP-6986-2017
person.identifier.scopus-author-id36620885600
person.identifier.scopus-author-id57195915156
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscoveryfe9fa41e-219f-4a80-8131-4cccb07c3a6a
relation.isProjectOfPublication560d5e42-c1ac-4401-a3f8-518d12401c5a
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