Rhodamine B Diffusion In Hair As A Probe For Structural Integrity.

dc.creatordos Santos Silva, A L
dc.creatorJoekes, I
dc.date2005-Jan
dc.date2015-11-27T13:01:56Z
dc.date2015-11-27T13:01:56Z
dc.date.accessioned2018-03-29T01:00:33Z
dc.date.available2018-03-29T01:00:33Z
dc.identifierColloids And Surfaces. B, Biointerfaces. v. 40, n. 1, p. 19-24, 2005-Jan.
dc.identifier0927-7765
dc.identifier10.1016/j.colsurfb.2004.10.005
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/15620835
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/196194
dc.identifier15620835
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1296427
dc.descriptionThe aim of this work was to investigate the diffusion of Rhodamine B into bleached, photo bleached and abraded hair, treated or not with an emulsion of ceramide using two different techniques: spectrophotometry and fluorescence optical microscopy with image analysis. This comparison, combined with the Einstein-Smoluchowski equation, allowed validating a methodology that uses the apparent diffusion coefficient of a dye as an index for hair damage. Distinct behaviors of the dye were observed in the cuticle and in the cortex. For a bleached hair sample the apparent diffusion coefficient in the cuticle ranges from 8.2 x 10(-11) cm2 s(-1) to 10 x 10(-11)cm2 s(-1), while for the cortex this value drops to 4.0 x 10(-11) cm2 s(-1) to 4.2 x 10(-11) cm2 s(-1). The diffusion is always faster in the cuticle than in the cortex and the apparent diffusion coefficient shows up to a seven-fold decrease when the dye penetrates the cortex. The chemical, photochemical and physical treatments applied to hair significantly change the values of the apparent diffusion coefficients in the cuticle. The data also proved that the penetration of Rhodamine B into hair occurs via an intercellular path.
dc.description40
dc.description19-24
dc.languageeng
dc.relationColloids And Surfaces. B, Biointerfaces
dc.relationColloids Surf B Biointerfaces
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectBiocompatible Materials
dc.subjectCations
dc.subjectCeramides
dc.subjectDiffusion
dc.subjectFluorescent Dyes
dc.subjectGlycosylation
dc.subjectHair
dc.subjectHumans
dc.subjectImage Processing, Computer-assisted
dc.subjectKinetics
dc.subjectMicroscopy, Fluorescence
dc.subjectRhodamines
dc.subjectSpectrophotometry
dc.subjectTemperature
dc.subjectTime Factors
dc.subjectUltraviolet Rays
dc.titleRhodamine B Diffusion In Hair As A Probe For Structural Integrity.
dc.typeArtículos de revistas


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