Screening of free radical formation in crystals of guanosine by ESR study

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dc.contributor.authorUsta, Ayhan
dc.contributor.authorVural, Hasibe Cingilli
dc.contributor.authorAsik, Biray
dc.contributor.authorUsta, Keziban
dc.date.accessioned2020-03-26T18:16:03Z
dc.date.available2020-03-26T18:16:03Z
dc.date.issued2011
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIn this study, to obtain guanosine polycrystalline, novel crystallization method was performed on powder guanosine material. Effective crystallization conditions were achieved by adjustment of the concentration of the metal ions, chemical solutions, NaCl, KCl, glacial acetic acid, nitric oxide, perchloric acid, glutamic acid, and pH of buffer. Behaviors of the guanosine polycrystal samples exposed to high-energy values were investigated using ESR method. The polycrystal samples were exposed to gamma-rays for 48 and 72 h. ESR signals were not recorded from the non-irradiated sample and the sample irradiated for 48 h, but the polycrystalline sample irradiated for 72 h exhibited complex ESR spectra. ESR measurements were taken on the irradiated sample in temperature range from 300 to 450 K. On the basis of all these measurements dependence temperature, it can be said that the shape of the spectrum was to be dependent on temperature slightly. Hence, we assume that the radical structure occurred was resistance to high temperature. Two radicals were determined in the structure irradiated and these were called radical I and radical II. The g, hyperfine constants, and spin density were found to be rho = 0.96, a(NNH)(N) = 2.7 mT, a(NNH)(N) = 1.155 mT, a(N) = 0.35 ml and g(1) = 2.0093 for the radical 1; a(N) = 4.7 ml and g(2) = 2.0094 for the radical II. (C) 2011 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific Research Projects Coordination center of Selcuk and Pamukkale University, Konya-Denizli/TurkeyPamukkale Universityen_US
dc.description.sponsorshipThis study was partially supported by the Scientific Research Projects Coordination center of Selcuk and Pamukkale University, Konya-Denizli/Turkey.en_US
dc.identifier.doi10.1016/j.molstruc.2011.08.023en_US
dc.identifier.endpage295en_US
dc.identifier.issn0022-2860en_US
dc.identifier.issue01.03.2020en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage292en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.molstruc.2011.08.023
dc.identifier.urihttps://hdl.handle.net/20.500.12395/26800
dc.identifier.volume1004en_US
dc.identifier.wosWOS:000296927300038en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofJOURNAL OF MOLECULAR STRUCTUREen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectESR spectroscopyen_US
dc.subjectRadiation effecten_US
dc.subjectRadicalen_US
dc.subjectGuanosineen_US
dc.subjectCrystallizationen_US
dc.titleScreening of free radical formation in crystals of guanosine by ESR studyen_US
dc.typeArticleen_US

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