Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/79760
Type: Artigo de periódico
Title: EFFECT OF LIGHT AND TANNIC-ACID ON THE STABILITY OF ANTHOCYANIN IN DMSO AND IN WATER
Author: BOBBIO, FO
DONASCIMENTOVARELLA, MT
BOBBIO, PA
Abstract: The stability to light of cyanidin-3-glucosyl arabinoside in DMSO and in water, in acid solutions with or without complexation with tannic acid was determined by measuring the decrease of the absorbance of the solutions. The values for the apparent first-order reaction rate constant and t(1/2) were calculated. The hypochromic effect observed in DMSO solutions when tannic acid was added as a co-pigment prevented the calculation of the complexation constant (K) for the anthocyanin-tannic acid, indicating that the predominating form in this system is the AH(+). Although loss of absorbance was considerably faster in DMSO than in water under the same conditions, tannic acid effectively retarded discoloration in both DMSO and water.
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Identifier DOI: 10.1016/0308-8146(94)90254-2
Date Issue: 1994
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOSA1994PF23900010.pdf257.57 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.