Free Radical Pathology and Antioxidants: Overview
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چکیده
منابع مشابه
Free radical scavengers and antioxidants from Tagetes mendocina.
Tagetes mendocina (Asteraceae) is a medicinal plant widely used in the Andean provinces of Argentina. Preliminary assays showed free radical scavenging activity in the methanol extract of the aerial parts, measured by the decoloration of a methanolic solution of the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) and scavenging of the superoxide anion. Assay-guided isolation led to 4'-hydroxyaceto...
متن کاملFree-radical scavenging activities, interactions and recycling of antioxidants.
28. Hogg, N., Llarley-Usmar, J. M., Wilson, M. T. and Moncada. S. (1992) Hiochem. J. 281.419-424 29. Kadi, K., Heckman, J. S., Hush, K. M. and Freeman, H. A. (1991) Arch. Hiochem. Hiophys. 288,481-487 30. Moreno. J. J. and Pryor, W. A. (1992) Inactivation of aI-proteinase inhibitor by peroxynitrite. Chern. Kes. Toxicol. 5, 425-431 31. Jessup, W., Mohr. Ll., Gieseg, S. P., Dean. K. T. and Stocke...
متن کاملMechanisms of the suppression of free radical overproduction by antioxidants.
In accordance with the mechanism of suppression of free radical overproduction in biological systems all antioxidants can be divided into two main groups: chain-breaking antioxidants and preventive antioxidants. Chain-breaking antioxidants, often referred to as free radical scavengers, protect against oxidative stress as a result of scavenging initial, peroxyl and rarely alkyl radicals. Prevent...
متن کاملEvaluation of free radical scavenging activity of some antioxidants.
UNLABELLED Measurement of free radical scavenging capacity of antioxidants is influenced by a number of parameters that depend on reaction rate. AIM A new method for assessing the free radical scavenging activity in which the influence of antioxidant concentration and reaction rate on chlorpromazine radical cation absorbance are simultaneously monitored. MATERIALS AND METHODS The change in ...
متن کاملPlant polyphenols: free radical scavengers or chain-breaking antioxidants?
There is increasing interest in the biological effects of tea- and wine-derived polyphenols and many studies in vitro and in vivo are demonstrating their antioxidant properties. Tea is a major source of dietary polyphenols and an even richer source of the flavanols, the catechins and catechin/gallate esters. Although there are limited studies on the bioavailability of the polyphenols, the absor...
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ژورنال
عنوان ژورنال: Journal of Nutritional Science and Vitaminology
سال: 1992
ISSN: 0301-4800,1881-7742
DOI: 10.3177/jnsv.38.special_538