نتایج جستجو برای: enzymatic antioxidant defense

تعداد نتایج: 217182  

Journal: Journal of Herbal Drugs 2015

Background & Aim: When the level of free radicals is increased and also when both the enzymatic systems and low molecular antioxidants are not sufficient to protect the organism, it seems necessary to get antioxidants from external sources. This study aimed to evaluate the antioxidant potential of different parts of Catharantus roseus Experimental: The antioxidant potential of ethanol...

2013
Milvia Luisa Racchi

This short review briefly introduces the formation of reactive oxygen species (ROS) as by-products of oxidation/reduction (redox) reactions, and the ways in which the antioxidant defense machinery is involved directly or indirectly in ROS scavenging. Major antioxidants, both enzymatic and non enzymatic, that protect higher plant cells from oxidative stress damage are described. Biochemical and ...

Journal: :Journal of occupational health 2006
Narayanaperumal J Parthasarathy Ramasundaram S Kumar Sundaramahalingam Manikandan Rathinasamy S Devi

Methanol is primarily metabolized by oxidation to formaldehyde and then to formate. These processes are accompanied by formation of superoxide anion and hydrogen peroxide. This paper reports data on the effect of methanol on antioxidant status and lipid peroxidation in lymphoid organs such as the spleen, thymus, lymph nodes and bone marrow of rats. Male Wistar albino rats were intoxicated with ...

Journal: : 2022

Plants are exposed to different ecological stress during their life cycle, and because of these tensions, free radicals shaped. Reactive oxygen species(ROS) have a fundamental ability support typical plant improvement tolerance. The disruption the proportionality ROS generation antioxidant defense systems is one primary effects biotic abiotic stress, resulting in an excess buildup oxidative dam...

2015
Yi Xu Patrick Burgess Bingru Huang Zhulong Chan

Mechanisms of plant root tolerance to high temperatures through antioxidant defense are not well understood. The objective of this study was to investigate whether superior root thermotolerance of heat-tolerant Agrostis scabra relative to its congeneric heat-sensitive Agrostis stolonifera was associated with differential accumulation of reactive oxygen species and antioxidant scavenging systems...

2012
Yoshiji Ohta Koji Yashiro Koji Ohashi Yoichiro Imai

We examined whether non-enzymatic antioxidant defense systems are disrupted in the brain of rats with water-immersion restraint stress. When rats were exposed to water-immersion restraint stress for 1.5, 3 or 6 h, the brain had decreased ascorbic acid and reduced glutathione contents and increased lipid peroxide and nitric oxide metabolites contents at 3 h and showed further changes in these co...

Journal: Journal of Herbal Drugs 2015

Background & Aim: When the level of free radicals is increased and also when both the enzymatic systems and low molecular antioxidants are not sufficient to protect the organism, it seems necessary to get antioxidants from external sources. This study aimed to evaluate the antioxidant potential of different parts of Catharantus roseus Experimental: The antioxidant potential of ethanol...

2016

Under normal conditions, the physiologically important intracellular levels of reactive oxygen species (ROS) are maintained at low levels by various antioxidant systems in the body but at high concentrations, they produce adverse modifications to cell components such as lipids, proteins and DNA. In humans, oxidative stress is involved in the development of cancer, parkinson's disease, alzheimer...

Journal: :Toxicology 2003
Maria L Urso Priscilla M Clarkson

Cells continuously produce free radicals and reactive oxygen species (ROS) as part of metabolic processes. These free radicals are neutralized by an elaborate antioxidant defense system consisting of enzymes such as catalase, superoxide dismutase, glutathione peroxidase, and numerous non-enzymatic antioxidants, including vitamins A, E and C, glutathione, ubiquinone, and flavonoids. Exercise can...

2015
Alpana Sahoo Jagneshwar Dandapat Luna Samanta

The present study demonstrates tissue-specific (hemolymph and fat body) and inter-voltine [bivoltine (BV) and trivoltine (TV)] differences in oxidatively damaged products, H2O2 content, and the relative level of antioxidant protection in the diapausing pupae of Antheraea mylitta. Results suggest that fat body (FB) of both the voltine groups has oxidative predominance, as evident from the high v...

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