Singlet oxygen generation in the reaction centers of Rhodobacter sphaeroides

dc.creatorUCHOA, Adjaci F.
dc.creatorKNOX, Peter P.
dc.creatorTURCHIELLE, Rozane
dc.creatorSEIFULLINA, Nurania Kh.
dc.creatorBAPTISTA, Mauricio S.
dc.date.accessioned2012-10-20T05:20:35Z
dc.date.accessioned2018-07-04T15:47:54Z
dc.date.available2012-10-20T05:20:35Z
dc.date.available2018-07-04T15:47:54Z
dc.date.created2012-10-20T05:20:35Z
dc.date.issued2008
dc.identifierEUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS, v.37, n.6, p.843-850, 2008
dc.identifier0175-7571
dc.identifierhttp://producao.usp.br/handle/BDPI/30890
dc.identifier10.1007/s00249-008-0287-y
dc.identifierhttp://dx.doi.org/10.1007/s00249-008-0287-y
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1627529
dc.description.abstractSinglet oxygen ((1)O(2)) generation in the reaction centers (RCs) of Rhodobacter sphaeroides wild type was characterized by luminescent emission in the near infrared region (time resolved transients and emission spectra) and quantified to have quantum yield of 0.03 +/- 0.005. (1)O(2) emission was measured as a function of temperature, ascorbate, urea and potassium ferricyanide concentrations and as a function of incubation time in H(2)O: D(2)O mixtures. (1)O(2) was shown to be affected by the RC dynamics and to originate from the reaction of molecular oxygen with two sources of triplets: photoactive dimer formed by singlet-triplet mixing and bacteriopheophytin formed by direct photoexcitation and intersystem crossing.
dc.languageeng
dc.publisherSPRINGER
dc.relationEuropean Biophysics Journal with Biophysics Letters
dc.rightsCopyright SPRINGER
dc.rightsrestrictedAccess
dc.subjectphotosynthetic bacteria
dc.subjectpurple bacteria
dc.subjectphotoinhibition
dc.subjecttriplets
dc.subjectquantum yield
dc.subjectROS
dc.titleSinglet oxygen generation in the reaction centers of Rhodobacter sphaeroides
dc.typeArtículos de revistas


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