Organosolv ethanol lignin from hybrid poplar as a radical scavenger: relationship between lignin structure, extraction conditions, and antioxidant activity.
Identifieur interne : 003D62 ( Main/Exploration ); précédent : 003D61; suivant : 003D63Organosolv ethanol lignin from hybrid poplar as a radical scavenger: relationship between lignin structure, extraction conditions, and antioxidant activity.
Auteurs : Xuejun Pan [Canada] ; John F. Kadla ; Katsunobu Ehara ; Neil Gilkes ; Jack N. SaddlerSource :
- Journal of agricultural and food chemistry [ 0021-8561 ] ; 2006.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Phénols.
- composition chimique : Lignine, Populus.
- isolement et purification : Lignine.
- pharmacologie : Antioxydants, Lignine.
- Acétylation, Hybridation génétique, Hydroxylation, Relation structure-activité, Éthanol.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Phenols.
- chemical , chemistry : Lignin.
- chemical , isolation & purification : Lignin.
- chemical , pharmacology : Antioxidants, Lignin.
- chemistry : Populus.
- Acetylation, Ethanol, Hybridization, Genetic, Hydroxylation, Structure-Activity Relationship.
Abstract
Twenty-one organosolv ethanol lignin samples were prepared from hybrid poplar (Populus nigra xP. maximowiczii) under varied conditions with an experimental matrix designed using response surface methodology (RSM). The lignin preparations were evaluated as potential antioxidants. Results indicated that the lignins with more phenolic hydroxyl groups, less aliphatic hydroxyl groups, low molecular weight, and narrow polydispersity showed high antioxidant activity. Processing conditions affected the functional groups and molecular weight of the extracted organosolv ethanol lignins, and consequently influenced the antioxidant activity of the lignins. In general, the lignins prepared at elevated temperature, longer reaction time, increased catalyst, and diluted ethanol showed high antioxidant activity. Regression models were developed to enable the quantitative prediction of lignin characteristics and antioxidant activity based on the processing conditions.
DOI: 10.1021/jf0605392
PubMed: 16881681
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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Kadla</name></author><author><name sortKey="Ehara, Katsunobu" sort="Ehara, Katsunobu" uniqKey="Ehara K" first="Katsunobu" last="Ehara">Katsunobu Ehara</name></author><author><name sortKey="Gilkes, Neil" sort="Gilkes, Neil" uniqKey="Gilkes N" first="Neil" last="Gilkes">Neil Gilkes</name></author><author><name sortKey="Saddler, Jack N" sort="Saddler, Jack N" uniqKey="Saddler J" first="Jack N" last="Saddler">Jack N. Saddler</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2006">2006</date><idno type="RBID">pubmed:16881681</idno><idno type="pmid">16881681</idno><idno type="doi">10.1021/jf0605392</idno><idno type="wicri:Area/Main/Corpus">003D60</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003D60</idno><idno type="wicri:Area/Main/Curation">003D60</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003D60</idno><idno type="wicri:Area/Main/Exploration">003D60</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Organosolv ethanol lignin from hybrid poplar as a radical scavenger: relationship between lignin structure, extraction conditions, and antioxidant activity.</title><author><name sortKey="Pan, Xuejun" sort="Pan, Xuejun" uniqKey="Pan X" first="Xuejun" last="Pan">Xuejun Pan</name><affiliation wicri:level="4"><nlm:affiliation>Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, Canada. xuepan@forestry.ubc.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver</wicri:regionArea><placeName><settlement type="city">Vancouver</settlement><region type="state">Colombie-Britannique</region></placeName><orgName type="university">Université de la Colombie-Britannique</orgName></affiliation></author><author><name sortKey="Kadla, John F" sort="Kadla, John F" uniqKey="Kadla J" first="John F" last="Kadla">John F. Kadla</name></author><author><name sortKey="Ehara, Katsunobu" sort="Ehara, Katsunobu" uniqKey="Ehara K" first="Katsunobu" last="Ehara">Katsunobu Ehara</name></author><author><name sortKey="Gilkes, Neil" sort="Gilkes, Neil" uniqKey="Gilkes N" first="Neil" last="Gilkes">Neil Gilkes</name></author><author><name sortKey="Saddler, Jack N" sort="Saddler, Jack N" uniqKey="Saddler J" first="Jack N" last="Saddler">Jack N. Saddler</name></author></analytic><series><title level="j">Journal of agricultural and food chemistry</title><idno type="ISSN">0021-8561</idno><imprint><date when="2006" type="published">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acetylation (MeSH)</term><term>Antioxidants (pharmacology)</term><term>Ethanol (MeSH)</term><term>Hybridization, Genetic (MeSH)</term><term>Hydroxylation (MeSH)</term><term>Lignin (chemistry)</term><term>Lignin (isolation & purification)</term><term>Lignin (pharmacology)</term><term>Phenols (analysis)</term><term>Populus (chemistry)</term><term>Structure-Activity Relationship (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Acétylation (MeSH)</term><term>Antioxydants (pharmacologie)</term><term>Hybridation génétique (MeSH)</term><term>Hydroxylation (MeSH)</term><term>Lignine (composition chimique)</term><term>Lignine (isolement et purification)</term><term>Lignine (pharmacologie)</term><term>Phénols (analyse)</term><term>Populus (composition chimique)</term><term>Relation structure-activité (MeSH)</term><term>Éthanol (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Phenols</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Lignin</term></keywords><keywords scheme="MESH" type="chemical" qualifier="isolation & purification" xml:lang="en"><term>Lignin</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Antioxidants</term><term>Lignin</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Phénols</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Lignine</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr"><term>Lignine</term></keywords><keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Antioxydants</term><term>Lignine</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Acetylation</term><term>Ethanol</term><term>Hybridization, Genetic</term><term>Hydroxylation</term><term>Structure-Activity Relationship</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Acétylation</term><term>Hybridation génétique</term><term>Hydroxylation</term><term>Relation structure-activité</term><term>Éthanol</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Twenty-one organosolv ethanol lignin samples were prepared from hybrid poplar (Populus nigra xP. maximowiczii) under varied conditions with an experimental matrix designed using response surface methodology (RSM). The lignin preparations were evaluated as potential antioxidants. Results indicated that the lignins with more phenolic hydroxyl groups, less aliphatic hydroxyl groups, low molecular weight, and narrow polydispersity showed high antioxidant activity. Processing conditions affected the functional groups and molecular weight of the extracted organosolv ethanol lignins, and consequently influenced the antioxidant activity of the lignins. In general, the lignins prepared at elevated temperature, longer reaction time, increased catalyst, and diluted ethanol showed high antioxidant activity. Regression models were developed to enable the quantitative prediction of lignin characteristics and antioxidant activity based on the processing conditions.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16881681</PMID><DateCompleted><Year>2006</Year><Month>09</Month><Day>21</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0021-8561</ISSN><JournalIssue CitedMedium="Print"><Volume>54</Volume><Issue>16</Issue><PubDate><Year>2006</Year><Month>Aug</Month><Day>09</Day></PubDate></JournalIssue><Title>Journal of agricultural and food chemistry</Title><ISOAbbreviation>J Agric Food Chem</ISOAbbreviation></Journal><ArticleTitle>Organosolv ethanol lignin from hybrid poplar as a radical scavenger: relationship between lignin structure, extraction conditions, and antioxidant activity.</ArticleTitle><Pagination><MedlinePgn>5806-13</MedlinePgn></Pagination><Abstract><AbstractText>Twenty-one organosolv ethanol lignin samples were prepared from hybrid poplar (Populus nigra xP. maximowiczii) under varied conditions with an experimental matrix designed using response surface methodology (RSM). The lignin preparations were evaluated as potential antioxidants. Results indicated that the lignins with more phenolic hydroxyl groups, less aliphatic hydroxyl groups, low molecular weight, and narrow polydispersity showed high antioxidant activity. Processing conditions affected the functional groups and molecular weight of the extracted organosolv ethanol lignins, and consequently influenced the antioxidant activity of the lignins. In general, the lignins prepared at elevated temperature, longer reaction time, increased catalyst, and diluted ethanol showed high antioxidant activity. 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Kadla</name><name sortKey="Saddler, Jack N" sort="Saddler, Jack N" uniqKey="Saddler J" first="Jack N" last="Saddler">Jack N. Saddler</name></noCountry><country name="Canada"><region name="Colombie-Britannique"><name sortKey="Pan, Xuejun" sort="Pan, Xuejun" uniqKey="Pan X" first="Xuejun" last="Pan">Xuejun Pan</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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