| Autor: |
Gonta, Alexandru, Lupascu, Tudor, Timbaliuc, Nina, Meghea, Aurelia |
| Zdroj: |
Central European Journal of Chemistry; Jul2014, Vol. 12 Issue 7, p757-762, 6p |
| Abstrakt: |
After oxidation of tannins (Tannins 1-3) extracted from grape seeds, Tanoxil compounds with increased solubility and enhanced antioxidant activities were synthesized. In this research, ABTS assay and a chemiluminescence method were used for antioxidant measurement of hydrophilic compounds (Tanoxils 1-3). It was observed that the antioxidant activity (AA, %) is very similar for the three samples, while at the same time AA is quite high (93.16%-96.48%). The percentage of inhibition by ABTS is higher for Tanoxil 2 (96.4%) as compared to Tannin 2 compound (14.34%). Moreover, the total content (T) of carboxyl and phenolic groups was investigated. T values, determined for Tanoxil products, revealed a double (Tanoxil 1) or triple (Tanoxil 2) increase as compared to the value of the T of Tannin 1. Tanoxil products represent an interest for future research as they have a high AA (96.4%) and the content of acidic groups is significant (T, 0.191 meq g). [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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