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Effect of some free radicals on biomolecules. Antioxidant and structure–activity relationships (SARs)of some phenolic, anilines and heterocyclic compounds
В наличии
Местонахождение: Алматы | Состояние экземпляра: новый |
Бумажная
версия
версия
Автор: Eslam Bendary,Ragy Francis and Samir El-Hady
ISBN: 9783659493874
Год издания: 2015
Формат книги: 60×90/16 (145×215 мм)
Количество страниц: 164
Издательство: LAP LAMBERT Academic Publishing
Цена: 42391 тг
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Аннотация: The scavenging behavior of a series of 36 phenolic, 17 anilines and 11 heterocyclic compounds toward Hydrogen peroxide and DPPH was examined.In Hydrogen peroxide scavenging activity, the aniline series are more active than the phenolic series due to the reduction properties of the aniline compounds. While, in the DPPH scavenging activity, the phenolic compounds are more active than the aniline compounds due to the lower bond dissociation energies (BDE) of O-H than that of N-H. The antioxidant activity related to the compound structure was found to be dependable on the number and position of the included active group (-OH or -NH2)The ortho position was found to be the more active one, due to its ability to form intra-molecular hydrogen bonding (iHB).the presence of double aromatic ring structure in phenolic and aniline compounds has a positive effect on the scavenging activity in both assays. electron withdrawing group has a positive effect on the hydrogen peroxide scavenging activity but it has a negative effect on the DPPH scavenging activity.The protective role of the most active phenolic and aniline compounds in linoleic acid model was also examined.
Ключевые слова: antioxidants, DPPH, free radical, Heterocyclic compounds, phenolic compounds, aniline compounds, H2O2 Scavenging, DPPH scavenging, H2O2 scavenging and structure-activity relationships (SARs), antioxidant reaction mechanism, The efficient concentration (EC50), The antiradical efficiency (AE), the antioxidant activity index (AAI), Lenoleic acid model.