Monovalent and divalent cation effects on phase transitions of iota-carrageenan

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dc.authorid0000-0002-6293-1359
dc.authorid0000-0001-8679-0530
dc.authorid0000-0002-0082-8209
dc.contributor.authorKara, Selimen_US
dc.contributor.authorArda, Ertanen_US
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.date.accessioned2015-01-15T23:00:50Z
dc.date.available2015-01-15T23:00:50Z
dc.date.issued2007-01
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Physicsen_US
dc.description.abstractPhase transitions Of L-carrageenan in a variety of monovalent (Li, Na, K) and divalent (Mg, Ca, Sr) cation solutions were studied during heating and cooling by using photon transmission technique. Photon transmission intensity (I-tr) was monitored against temperature to determine the transition temperatures and activation energies during the heating and cooling processes in the monovalent and divalent systems. Three distinct transition regions were observed during the heating and cooling cycles for the carrageenan-divalent salt system. At the first step of the heating process, dimer groups were transformed into dimers that presented (g-d) transitions, then these dimers were directly converted into a double helix by undergoing a (d-h) transition. In the higher temperature region, a double helix-to-coil (h-c) transition took place. During the cooling process, these transitions are arranged in the order of (c-h), (h-d), and (d-g). The carrageenan-monovalent salt system presented only coil-to-rod-like helix (c-r) and rod-like helix-to-coil (r-c) transitions during the cooling and heating processes, respectively. A hysteresis was observed between (r-c)-(c-r) and (g-d)-(d-g) transitions for the monovalent and divalent cations, respectively.en_US
dc.description.versionPublisher's Verisonen_US
dc.identifier.citationKara, S., Arda, E. & Pekcan, M. Ö. (2007). Monovalent and divalent cation effects on phase transitions of iota-carrageenan. Journal of Bioactive and Compatible Polymers, 22(1), 42-61. doi:10.1177/0883911506073361en_US
dc.identifier.doi10.1177/0883911506073361
dc.identifier.endpage61
dc.identifier.issn0883-9115
dc.identifier.issn1530-8030
dc.identifier.issue1
dc.identifier.scopus2-s2.0-33845521901
dc.identifier.scopusqualityQ3
dc.identifier.startpage42
dc.identifier.urihttps://hdl.handle.net/11729/271
dc.identifier.urihttp://dx.doi.org/10.1177/0883911506073361
dc.identifier.volume22
dc.identifier.wosWOS:000243487600004
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorPekcan, Mehmet Önderen_US
dc.institutionauthorid0000-0002-0082-8209
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherSage Publications Ltden_US
dc.relation.ispartofJournal of Bioactive and Compatible Polymersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLiquid-crystalen_US
dc.subjectPerspectivesen_US
dc.subjectDynamicsen_US
dc.subjectGelsen_US
dc.subjectDrug-delivery systemsen_US
dc.subjectPhoton transmissionen_US
dc.subjectKappa-carrageenanen_US
dc.subjectCarrageenanen_US
dc.subjectPhase transitionen_US
dc.subjectActivation energyen_US
dc.subjectDouble helixen_US
dc.subjectHysteresisen_US
dc.subjectCoolingen_US
dc.subjectDimersen_US
dc.subjectHigh temperature effectsen_US
dc.subjectMagnesium printing platesen_US
dc.subjectPhase transitionsen_US
dc.subjectPositive ionsen_US
dc.subjectCalciumen_US
dc.subjectDivalent cationen_US
dc.subjectLithiumen_US
dc.subjectMagnesiumen_US
dc.subjectMonovalent cationen_US
dc.subjectPotassiumen_US
dc.subjectSodiumen_US
dc.subjectStrontiumen_US
dc.subjectHeatingen_US
dc.subjectPhotonen_US
dc.subjectTransition temperatureen_US
dc.subjectCooling cyclesen_US
dc.subjectTransition temperaturesen_US
dc.subjectSaltsen_US
dc.titleMonovalent and divalent cation effects on phase transitions of iota-carrageenanen_US
dc.typeArticleen_US
dspace.entity.typePublication

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