The endogenous defenses of the mouse heart against reactive oxygen metabolites were investigated. The activities of three enzymes capable of detoxifying activated oxygen were determined in both the heart and liver; cardiac muscle contains 150 times less catalase and nearly four times less superoxide dismutase than liver. Glutathione peroxidase activities were, however, similar to the two tissue...

selenium is an essential element for humans, therefore, adding it to plants is convenient for biofortification. thus, the aim of this work was to analyze experimentally the ability of sodium selenite to increase the concentration of se and modify the antioxidant activity in tomato plants. we used plants of the toro hybrid variety and applied three treatments: 0, 2 and 5 mg l-1 of selenium as so...

subclinical mastitis is considered as one of the most prevalent diseases in dairy cows, causing drasticloss in the dairy industry. oxidative stress, induced by reactive oxygen species (ros), is believed to be aprimary factor in various cattle diseases including mastitis, but there are few studies regarding the role ofros in subclinical mastitis. this study was undertaken to i) study the changes...

Glutathione functions as an important antioxidant in the destruction of hydrogen peroxide and lipid peroxides by providing substrate for the glutathione peroxidase and also promotes the ascorbic acid. Glutathione plays a vital role in detoxification of xenobiotics, carcinogens, free radicals and maintenance of immune functions. The study was aimed to determine plasma glutathione as well as eryt...