Small molecule sorption and desorption in and out of iota-carrageenan gels
Identifieur interne : 000812 ( Main/Exploration ); précédent : 000811; suivant : 000813Small molecule sorption and desorption in and out of iota-carrageenan gels
Auteurs : Evren Ataman [Turquie] ; Onder Pekcan [Turquie]Source :
- Journal of macromolecular science. Physics [ 0022-2348 ] ; 2007.
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Abstract
Small molecule sorption and desorption in and out of lota-Carrageenan was studied by using steady-state fluorescence (SSF) technique. Pyranine dissolved in water used as fluorescence probe. Fluorescence emission intensity, Ip from pyranine was monitored for studying sorption and desorption processes at various temperatures. The Fickian model was applied to produce sorption, DS, early desorption, Ded, and desorption, Dd, coefficients. Corresponding activation energies were obtained and found to be 20.5 kJ mol-1, 7.0 kJ mol-1 and 34.9 kJ mol-1 respectively. The observed Ded value is an order of magnitude smaller than the D, and Dd coefficients. On the other hand, sorption processes were shown to be twice as fast as desorption processes.
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Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Small molecule sorption and desorption in and out of iota-carrageenan gels</title><author><name sortKey="Ataman, Evren" sort="Ataman, Evren" uniqKey="Ataman E" first="Evren" last="Ataman">Evren Ataman</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Istanbul Technical University, Maslak Istanbul</s1><s3>TUR</s3><sZ>1 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Department of Physics, Istanbul Technical University, Maslak Istanbul</wicri:noRegion></affiliation></author><author><name sortKey="Pekcan, Onder" sort="Pekcan, Onder" uniqKey="Pekcan O" first="Onder" last="Pekcan">Onder Pekcan</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physics, I========Scedil;ik University, ========Scedil;ile Istanbul</s1><s3>TUR</s3><sZ>2 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Department of Physics, I========Scedil;ik University, ========Scedil;ile Istanbul</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">07-0354373</idno><date when="2007">2007</date><idno type="stanalyst">PASCAL 07-0354373 INIST</idno><idno type="RBID">Pascal:07-0354373</idno><idno type="wicri:Area/PascalFrancis/Corpus">000056</idno><idno type="wicri:Area/PascalFrancis/Curation">000062</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000054</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000054</idno><idno type="wicri:doubleKey">0022-2348:2007:Ataman E:small:molecule:sorption</idno><idno type="wicri:Area/Main/Merge">000824</idno><idno type="wicri:Area/Main/Curation">000812</idno><idno type="wicri:Area/Main/Exploration">000812</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Small molecule sorption and desorption in and out of iota-carrageenan gels</title><author><name sortKey="Ataman, Evren" sort="Ataman, Evren" uniqKey="Ataman E" first="Evren" last="Ataman">Evren Ataman</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics, Istanbul Technical University, Maslak Istanbul</s1><s3>TUR</s3><sZ>1 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Department of Physics, Istanbul Technical University, Maslak Istanbul</wicri:noRegion></affiliation></author><author><name sortKey="Pekcan, Onder" sort="Pekcan, Onder" uniqKey="Pekcan O" first="Onder" last="Pekcan">Onder Pekcan</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physics, I========Scedil;ik University, ========Scedil;ile Istanbul</s1><s3>TUR</s3><sZ>2 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Department of Physics, I========Scedil;ik University, ========Scedil;ile Istanbul</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of macromolecular science. Physics</title><title level="j" type="abbreviated">J. macromol. sci., Phys.</title><idno type="ISSN">0022-2348</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of macromolecular science. Physics</title><title level="j" type="abbreviated">J. macromol. sci., Phys.</title><idno type="ISSN">0022-2348</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term><term>Carrageenan</term><term>Emissive probe</term><term>Experimental study</term><term>Hydrogel</term><term>Molecule scattering</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Carraghénane</term><term>Hydrogel</term><term>Diffusion molécule</term><term>Sonde émissive</term><term>Energie activation</term><term>Etude expérimentale</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Small molecule sorption and desorption in and out of lota-Carrageenan was studied by using steady-state fluorescence (SSF) technique. Pyranine dissolved in water used as fluorescence probe. Fluorescence emission intensity, I<sub>p</sub> from pyranine was monitored for studying sorption and desorption processes at various temperatures. The Fickian model was applied to produce sorption, D<sub>S</sub>, early desorption, D<sub>ed</sub>, and desorption, D<sub>d</sub>, coefficients. Corresponding activation energies were obtained and found to be 20.5 kJ mol<sup>-1</sup>, 7.0 kJ mol<sup>-1</sup> and 34.9 kJ mol<sup>-1</sup> respectively. The observed D<sub>ed</sub> value is an order of magnitude smaller than the D, and D<sub>d</sub> coefficients. On the other hand, sorption processes were shown to be twice as fast as desorption processes.</div></front></TEI><affiliations><list><country><li>Turquie</li></country></list><tree><country name="Turquie"><noRegion><name sortKey="Ataman, Evren" sort="Ataman, Evren" uniqKey="Ataman E" first="Evren" last="Ataman">Evren Ataman</name></noRegion><name sortKey="Pekcan, Onder" sort="Pekcan, Onder" uniqKey="Pekcan O" first="Onder" last="Pekcan">Onder Pekcan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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