Iron-binding catechols oxidating lignin and chlorolignin

dc.creatorParra, C
dc.creatorRodriguez, J
dc.creatorBaeza, J
dc.creatorFreer, J
dc.creatorDuran, N
dc.date1998
dc.dateOCT 20
dc.date2014-12-02T16:29:56Z
dc.date2015-11-26T17:38:19Z
dc.date2014-12-02T16:29:56Z
dc.date2015-11-26T17:38:19Z
dc.date.accessioned2018-03-29T00:19:57Z
dc.date.available2018-03-29T00:19:57Z
dc.identifierBiochemical And Biophysical Research Communications. Academic Press Inc Elsevier Science, v. 251, n. 2, n. 399, n. 402, 1998.
dc.identifier0006-291X
dc.identifierWOS:000076638900001
dc.identifier10.1006/bbrc.1998.9315
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60731
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/60731
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60731
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1286174
dc.descriptionIron-chelating low-molecular-weight compounds or catecholate siderophores have been suggested to be involved in mood biodegradation. To help in understanding the mechanism involved in the enzyme-like activity of catecholate siderophores, the oxidative properties of 2,3-dihydroxybenzoic acid (DHBA) and 3,4-dihydroxyphenylacetic acid (DHPAA) chelated with iron were studied. The pH and catechol/Fe(III) ratios were optimized for o-dianisidine oxidation, obtaining a maximum at pH 7.0, in the absence of buffer, and a catechol/Fe(III) ratio of 1:2 to DHBA and 1:1 to DHPAA was found. Under these conditions, the catechols were able to reduce Fe(III) to Fe(II) acting like siderophore models. The Fe(PII) complex of DHBA and of DHPAA degraded dioxane-lignin in 60% after 2 h and 85% after 24 h, respectively. DHBA/Fe(III) oxidized the bleaching effluent (E1) in 80% in 5 min under the studied conditions. (C) 1998 Academic Press.
dc.description251
dc.description2
dc.description399
dc.description402
dc.languageen
dc.publisherAcademic Press Inc Elsevier Science
dc.publisherSan Diego
dc.publisherEUA
dc.relationBiochemical And Biophysical Research Communications
dc.relationBiochem. Biophys. Res. Commun.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectlignin
dc.subjectsiderophore
dc.subjectcatechol
dc.subjectchlorolignin
dc.subjectReducing Molecular-oxygen
dc.subjectWood Decay Fungi
dc.subjectFerric Iron
dc.subjectExtracellular Substance
dc.subjectFerrous Iron
dc.subjectSiderophores
dc.titleIron-binding catechols oxidating lignin and chlorolignin
dc.typeArtículos de revistas


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