Document Detail

Stability of copigmented anthocyanins and ascorbic acid in a grape juice model system.
MedLine Citation:
PMID:  15631508     Owner:  NLM     Status:  MEDLINE    
The stability of red grape anthocyanins (Vitis vinifera) was evaluated in a model juice system during normal (25 degrees C) and accelerated storage (35 degrees C) in the presence of ascorbic acid. Rosemary polyphenolic cofactors (0, 0.2, and 0.4% v/v) were evaluated as anthocyanin stabilizing agents. Cofactor addition resulted in concentration-dependent hyperchromic (up to 178%) and bathochromic (up to 23 nm) shifts, indicating a more intense red coloration of the models. Anthocyanin and ascorbic acid degradation followed first-order kinetics during storage. Results showed that copigmented treatments underwent a lower conversion of L-ascorbic acid into dehydroascorbic acid during storage when compared to the control, favorably impacting the vitamin retention of these models. Copigmentation did not affect anthocyanin degradation in the absence of ascorbic acid but in its presence aided to retain a higher anthocyanin content than the control. This study indicated that the addition of anthocyanin cofactors could be used to reduce the pigment and vitamin degradation while masking detrimental color changes in anthocyanin containing products.
Carmen H Brenes; David Del Pozo-Insfran; Stephen T Talcott
Related Documents :
9121938 - Effect of antioxidant vitamin supplementation on dna damage and repair in human lymphob...
14962048 - Morphological and physiological changes of staphylococcus aureus exposed to hypochlorou...
931498 - Influence of some processing methods on the quality of apple slices: ii-cultivar melrose.
3397368 - Simultaneous determination of ascorbic acid and dehydroascorbic acid in cultures of c3h...
7413188 - Facilitated diffusion as a method for selective accumulation of materials from the prim...
7061648 - Gas chromatographic method for the simultaneous determination of dopamine and norepinep...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  53     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-01-05     Completed Date:  2005-03-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  49-56     Citation Subset:  IM    
Department of Food Technology, ITESM-Campus Monterrey, E. Garza Sada 2501 Sur, C.P. 64849, Monterrey, N.L., Mexico.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Anthocyanins / analysis*
Ascorbic Acid / analysis*
Beverages / analysis
Drug Stability
Food Preservation
Fruit / chemistry*
Pigments, Biological / analysis*
Time Factors
Vitis / chemistry*
Reg. No./Substance:
0/Anthocyanins; 0/Pigments, Biological; 50-81-7/Ascorbic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Effect of pectolytic enzyme preparations on the phenolic composition and antioxidant activity of asp...
Next Document:  Antibacterial activity of Cuminum cyminum L. and Carum carvi L. essential oils.