Document Detail

Total phenolic contents and free-radical scavenging activities of grape (Vitis vinifera L.) and grape products.
MedLine Citation:
PMID:  23025419     Owner:  NLM     Status:  Publisher    
Grape is one of the world's largest fruit crops, with an approximate annual production of 58 million metric tons, and it is well known that the grape skins, seeds and stems, waste products generated during wine and grape juice processing, are rich sources of polyphenols. It contains flavonoids, phenolic acids and stilbenes. In this study, we tried to determine antioxidant properties and phenolic contents of grape and grape products (fresh fruit, seed, dried fruit, molasses, pestil, vinegar) of ethanol and water extracts. Antioxidant properties of extracts were investigated by DPPH(•), ABTS(•+), superoxide, H(2)O(2) scavenging, reducing power, metal chelating activity and determination of total phenolic contents. The seed extracts revealed highest ABTS(•+), DPPH(•), H(2)O(2) scavenging and reducing power activities. Furthermore, these extracts showed higher total phenolic contents than other grape product extracts.
Serhat Keser; Sait Celik; Semra Turkoglu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-2
Journal Detail:
Title:  International journal of food sciences and nutrition     Volume:  -     ISSN:  1465-3478     ISO Abbreviation:  Int J Food Sci Nutr     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9432922     Medline TA:  Int J Food Sci Nutr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Chemistry, Faculty of Science, Firat University , 23119 Elazig , Turkey.
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