drought is the most common environmental stress in vineyard occurs in soils with low water content, even in irrigation condition. to evaluate foliar spraying of ascorbic acid under drought stress, a research during 2012 to 2013 years in the natural environment, and one year after the establishment of the cuttings in clay loam soil was conducted. cultivars with two-level white seedless and khosh...

background: white button mushroom (agaricus bisporus) is a sensitive agricultural crop whose antioxidant properties are decreased during postharvest storage. in this study, the effect of citric acid dipping treatment on bioactive components and antioxidant properties of sliced button mushroom (agaricus bisporus) was investigated. methods: fresh mushrooms soaked in chilled citric acid solution a...

background it has been proposed that reactive oxygen species (ros) is involved in the pathogenesis of various diseases. paraoxonase, a high-density lipoprotein associated enzyme, prevents low-density lipoproteins from oxidation. objectives the aim of the present study was to investigate the serum activities of paraoxonase-1 (pon-1), and aryleterase (are) as well as total antioxidant capacity (t...

results the results of the study, using the two methods, showed that all methanol extracts of leaves and fruits of the six species possessed antioxidant activity. the antioxidant activity of the samples was compared with the antioxidant activities of butylatedhydroxytoluene (bht), as a synthetic antioxidant and α-tocopherol as a natural antioxidant. methanol extractions of pinus spp. leaves and...

Reactive oxygen species (ROS) can damage proteins, cause lipid peroxidation, and react with DNA, ultimately resulting in harmful effects. Antioxidants constitute one of the defense systems used to neutralize pro-oxidants. Since pro-oxidants and antioxidants are found ubiquitously in nature, pro-and antioxidant effects of individual compounds and of mixtures receive much attention in scientific ...

1. Free radicals, antioxidant enzymes and oxidative stress 2. Natural anoxia tolerance and adaptations to oxidative stress 2.1. Antioxidants and garter snakes under anoxia exposure 2.2. Antioxidants and leopard frogs under anoxia and reoxygenation 2.3. Antioxidants and goldfish under anoxia and reoxygenation 2.4. Antioxidants and turtles under anoxia and reoxygenation 2.5. Lipid peroxidation, x...

Advanced age in type-II diabetic patients is associated with an accumulation of free radical damage, which leads to physiological and\ clinical modifications. Age related changes resulting from free radical reactions include increasing levels of lipid peroxides, alterations in enzyme activities and greater osmotic fragility. The present study was conducted to estimate the level of lipid peroxid...

Research on the use, properties, characteristics and sources of antioxidants especially phenolic compounds, flavonoids, vitamins, synthetic chemicals and some micronutrients began in the late 18(th) century. Since then antioxidant research has received considerable attention and over a hundred thousand papers have been published on the subject. This has led to a rampant use of antioxidants in o...

The aim of this study was to observe the effect of folate and antioxidants alone on homocysteine levels and oxidative stress markers, and to evaluate whether their co-administration promotes their effects. One hundred patients with hyperhomocysteinemia were randomized into four equal groups, which were then treated with folate, antioxidants or folate plus antioxidants for 2 months; group IV was...

Pomegranate is a source of some very potent antioxidants (tannins, anthocyanins) which are considered to be also potent anti-atherogenic agents. The combination of the above unique various types of pomegranate polyphenols provides a much wider spectrum of action against several types of free radicals. Indeed, pomegranate is superior in comparison to other antioxidants in protecting low-density ...