Comparative investigation on antioxidant properties of phenolic compounds in lubricants
نویسندگان
چکیده
Antioxidant properties of several phenolic compounds in lubricants were investigated by quantum mechanical simulation. The reaction barrier phenol, 2-tert-butylphenol and 2,6-di-tert-butylphenol with the alkoxy free radical generated oxidation, bond dissociation energy O-H them, difference from HOMO to LUMO them calculated. activity phenoxy radicals formed after hydrogen supply was compared. results showed that capacity decreased, while increased obviously increase substituents on benzene ring. As number ortho rise, decreased slowly. antioxidant related not only but also steric hindrance antioxidants.
منابع مشابه
Antioxidant properties of phenolic compounds
The addition of synthetic antioxidants to oils and/or foods is one of the most efficient ways to prevent lipid oxidation. However, the safety of synthetic additives has been questioned stimulating the evaluation of naturally occurring compounds with antioxidative properties. Although there is no assurance of the safety of natural antioxidants, there is some comfort knowing that such antioxidant...
متن کاملAntioxidant and Antiradical Properties of Selected Flavonoids and Phenolic Compounds
Phenolic compounds and flavonoids are known by their antioxidant properties and one of the most important sources for humans is the diet. Due to the harmful effects of synthetic antioxidants such as BHA and BHT, natural novel antioxidants have become the focus of attention for protecting foods and beverages and reducing oxidative stress in vivo. In the current study, we investigated the total a...
متن کاملPhenolic Compounds as Potential Antioxidant
Implication for health policy makers/practice/research/medical education: This article aims to introduce antioxidants more. Copyright © 2013, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences; Published by DOCS. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction...
متن کاملPhenolic Compounds and Antioxidant Activity of Rice
The aim of this work was to study the phenolic compounds identified in rice, their antioxidant activity and their potential beneficial effects on health. In vitro and in vivo studies evaluating the rice grains with different pericarp colour (light brown, red and black) showed potential beneficial effects on health related to the polyphenol content of the grain, such as reduction of oxidative st...
متن کاملAntioxidant phenolic compounds of Dracaena cambodiana.
The antioxidant activities of the petroleum ether, ethyl acetate, n-BuOH and water extract fractions from Dracaena cambodiana Pierre ex Gagnep were evaluated in this study. The ethyl acetate fraction contained the highest amount of total phenolics and total flavonoids, and showed the greatest DPPH˙, ABTS+ and Superoxide anion radical-scavenging capacities. The DPPH˙, ABTS+ and Superoxide anion ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of physics
سال: 2022
ISSN: ['0022-3700', '1747-3721', '0368-3508', '1747-3713']
DOI: https://doi.org/10.1088/1742-6596/2348/1/012016