Hydrophobically modified xanthan: an amphiphilic but not associative polymer.
Identifieur interne : 000323 ( France/Analysis ); précédent : 000322; suivant : 000324Hydrophobically modified xanthan: an amphiphilic but not associative polymer.
Auteurs : Audrey Roy [France] ; Sébastien Comesse ; Michel Grisel ; Nicolas Hucher ; Zied Souguir ; Frédéric RenouSource :
- Biomacromolecules [ 1526-4602 ] ; 2014.
English descriptors
- KwdEn :
- MESH :
- chemical , chemical synthesis : Polysaccharides, Bacterial.
- chemical , chemistry : Amines, Polysaccharides, Bacterial.
- Hydrophobic and Hydrophilic Interactions, Magnetic Resonance Spectroscopy, Rheology, Spectrometry, Fluorescence, Temperature, Viscosity.
Abstract
Hydrophobic octyl moieties have been grafted in various densities onto the carboxylic acid functions of xanthan under its ordered conformation. The outcoming amphiphilic and associative properties were studied by fluorescence spectroscopy and rheology. Results showed that the conformation of xanthan is not affected by the chemical modification and remains the same as the native one. Additionally, xanthan derivatives do not show any viscoelastic enhancement; nevertheless, their dynamics is strongly slowed down: the higher the grafting density, the slower the relaxation. We proved that hydrophobically modified xanthan, even being amphiphilic, does not exhibit any additional associating properties compared to the unmodified xanthan. The high stiffness of xanthan helices does not allow the derivatives to adopt the organization usually observed for flexible amphiphilic polymers. On the basis of these observations, a model depicting such a singular behavior is proposed.
DOI: 10.1021/bm4017034
PubMed: 24547905
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PubMed, to step Corpus: 000138
- to stream PubMed, to step Curation: 000138
- to stream PubMed, to step Checkpoint: 000138
- to stream Ncbi, to step Merge: 000392
- to stream Ncbi, to step Curation: 000392
- to stream Ncbi, to step Checkpoint: 000392
- to stream Main, to step Merge: 000341
- to stream Main, to step Curation: 000343
- to stream Main, to step Exploration: 000343
- to stream France, to step Extraction: 000323
Links to Exploration step
pubmed:24547905Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Hydrophobically modified xanthan: an amphiphilic but not associative polymer.</title><author><name sortKey="Roy, Audrey" sort="Roy, Audrey" uniqKey="Roy A" first="Audrey" last="Roy">Audrey Roy</name><affiliation wicri:level="3"><nlm:affiliation>University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Comesse, Sebastien" sort="Comesse, Sebastien" uniqKey="Comesse S" first="Sébastien" last="Comesse">Sébastien Comesse</name></author><author><name sortKey="Grisel, Michel" sort="Grisel, Michel" uniqKey="Grisel M" first="Michel" last="Grisel">Michel Grisel</name></author><author><name sortKey="Hucher, Nicolas" sort="Hucher, Nicolas" uniqKey="Hucher N" first="Nicolas" last="Hucher">Nicolas Hucher</name></author><author><name sortKey="Souguir, Zied" sort="Souguir, Zied" uniqKey="Souguir Z" first="Zied" last="Souguir">Zied Souguir</name></author><author><name sortKey="Renou, Frederic" sort="Renou, Frederic" uniqKey="Renou F" first="Frédéric" last="Renou">Frédéric Renou</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2014">2014</date><idno type="RBID">pubmed:24547905</idno><idno type="pmid">24547905</idno><idno type="doi">10.1021/bm4017034</idno><idno type="wicri:Area/PubMed/Corpus">000138</idno><idno type="wicri:Area/PubMed/Curation">000138</idno><idno type="wicri:Area/PubMed/Checkpoint">000138</idno><idno type="wicri:Area/Ncbi/Merge">000392</idno><idno type="wicri:Area/Ncbi/Curation">000392</idno><idno type="wicri:Area/Ncbi/Checkpoint">000392</idno><idno type="wicri:Area/Main/Merge">000341</idno><idno type="wicri:Area/Main/Curation">000343</idno><idno type="wicri:Area/Main/Exploration">000343</idno><idno type="wicri:Area/France/Extraction">000323</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Hydrophobically modified xanthan: an amphiphilic but not associative polymer.</title><author><name sortKey="Roy, Audrey" sort="Roy, Audrey" uniqKey="Roy A" first="Audrey" last="Roy">Audrey Roy</name><affiliation wicri:level="3"><nlm:affiliation>University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>University of Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Haute-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Comesse, Sebastien" sort="Comesse, Sebastien" uniqKey="Comesse S" first="Sébastien" last="Comesse">Sébastien Comesse</name></author><author><name sortKey="Grisel, Michel" sort="Grisel, Michel" uniqKey="Grisel M" first="Michel" last="Grisel">Michel Grisel</name></author><author><name sortKey="Hucher, Nicolas" sort="Hucher, Nicolas" uniqKey="Hucher N" first="Nicolas" last="Hucher">Nicolas Hucher</name></author><author><name sortKey="Souguir, Zied" sort="Souguir, Zied" uniqKey="Souguir Z" first="Zied" last="Souguir">Zied Souguir</name></author><author><name sortKey="Renou, Frederic" sort="Renou, Frederic" uniqKey="Renou F" first="Frédéric" last="Renou">Frédéric Renou</name></author></analytic><series><title level="j">Biomacromolecules</title><idno type="eISSN">1526-4602</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amines (chemistry)</term><term>Hydrophobic and Hydrophilic Interactions</term><term>Magnetic Resonance Spectroscopy</term><term>Polysaccharides, Bacterial (chemical synthesis)</term><term>Polysaccharides, Bacterial (chemistry)</term><term>Rheology</term><term>Spectrometry, Fluorescence</term><term>Temperature</term><term>Viscosity</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemical synthesis" xml:lang="en"><term>Polysaccharides, Bacterial</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Amines</term><term>Polysaccharides, Bacterial</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Hydrophobic and Hydrophilic Interactions</term><term>Magnetic Resonance Spectroscopy</term><term>Rheology</term><term>Spectrometry, Fluorescence</term><term>Temperature</term><term>Viscosity</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Hydrophobic octyl moieties have been grafted in various densities onto the carboxylic acid functions of xanthan under its ordered conformation. The outcoming amphiphilic and associative properties were studied by fluorescence spectroscopy and rheology. Results showed that the conformation of xanthan is not affected by the chemical modification and remains the same as the native one. Additionally, xanthan derivatives do not show any viscoelastic enhancement; nevertheless, their dynamics is strongly slowed down: the higher the grafting density, the slower the relaxation. We proved that hydrophobically modified xanthan, even being amphiphilic, does not exhibit any additional associating properties compared to the unmodified xanthan. The high stiffness of xanthan helices does not allow the derivatives to adopt the organization usually observed for flexible amphiphilic polymers. On the basis of these observations, a model depicting such a singular behavior is proposed.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Le Havre</li></settlement></list><tree><noCountry><name sortKey="Comesse, Sebastien" sort="Comesse, Sebastien" uniqKey="Comesse S" first="Sébastien" last="Comesse">Sébastien Comesse</name><name sortKey="Grisel, Michel" sort="Grisel, Michel" uniqKey="Grisel M" first="Michel" last="Grisel">Michel Grisel</name><name sortKey="Hucher, Nicolas" sort="Hucher, Nicolas" uniqKey="Hucher N" first="Nicolas" last="Hucher">Nicolas Hucher</name><name sortKey="Renou, Frederic" sort="Renou, Frederic" uniqKey="Renou F" first="Frédéric" last="Renou">Frédéric Renou</name><name sortKey="Souguir, Zied" sort="Souguir, Zied" uniqKey="Souguir Z" first="Zied" last="Souguir">Zied Souguir</name></noCountry><country name="France"><region name="Région Normandie"><name sortKey="Roy, Audrey" sort="Roy, Audrey" uniqKey="Roy A" first="Audrey" last="Roy">Audrey Roy</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/France/Analysis
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000323 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/France/Analysis/biblio.hfd -nk 000323 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/France
|area= LeHavreV1
|flux= France
|étape= Analysis
|type= RBID
|clé= pubmed:24547905
|texte= Hydrophobically modified xanthan: an amphiphilic but not associative polymer.
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/France/Analysis/RBID.i -Sk "pubmed:24547905" \
| HfdSelect -Kh $EXPLOR_AREA/Data/France/Analysis/biblio.hfd \
| NlmPubMed2Wicri -a LeHavreV1
| This area was generated with Dilib version V0.6.25. |  |