Antioxidant activity of methanolic extract of Drynaria quercifolia rhizome at different concentrations (100, 200 and 300μg/ml) were studied in various in vitro models. Results were compared with standard ascorbic acid. Antioxidant activity of extract was increased with the increasing concentration. The order of antioxidant potential according to models were found to be highest in nitric oxide s...

Curcumin has been extensively reported as a potential natural antioxidant. However, there was no data on activity comparison as well as the biological interactions of curcumin with other natural antioxidants. The aim of the present study was to investigate the antioxidant power of curcumin in comparison with three important natural antioxidants; gallic acid, ascorbic acid, and xanthone on free ...

strawberry (fragaria ananassa duch.) is a good source of natural antioxidants. fruits from eight strawberry (fragaria ananassa duch.) cultivars (‘kurdistan’, ‘merck’, ‘camarosa’, ‘paros’, ‘queen elisa’, ‘ventana’, ‘selva’ and ‘pajaro’) were harvested at ripen stage and analyzed for total phenolic content, total anthocyanin content, vitamin c, total soluble solid and total antioxidant activity. ...

In our previous study, we have found that persimmon, guava, and sweetsop owned considerably high antioxidant activity and contained high total phenolic contents as well. In order to further supply information on the antibacterial and antioxidant activity of these three tropic fruits, they were extracted by 80% methanol. We then examined the extractions about their phenolic compounds and also st...

The purpose of this study is to evaluate and compare the free radical scavenging activity and protective properties of the natural product SQGD-IBG-21 isolated from a radioresistant bacterium Bacillus sp. INM-1 and synthetic nitroxyl free radical containing antioxidant 1-ethyl-1-nitroso-3-[4-(2,2,6,6-tetramethylpiperidine1-oxyl)]-urea (SLENU). It was found a higher reducing power potential for ...

background: mayonnaise is one of the food emulsions (o/w) that is used as a condiment in various foods.  objective: linseed oil (containing omega-3 fatty acids) was used at the replacement levels of 10, 15 and 20% of soybean oil in mayonnaise formulation and the sensory properties of samples were evaluated. methods: in the second part of this research, the zataria multiflora boiss. (zmeo) and s...

Spearmint (Mentha spicata L.), oregano (Origanum vulgare L.) and thyme (Thymus vulgaris L.) are used as traditional medicines, culinary herbs and food flavorings. All samples collected from Khuzestan province, Iran and plant extracts prepared using Clevenger apparatus. Antioxidant capacity and major parameters affecting antioxidant properties including total phenolics, flavonoids and vitamin C ...

Nowadays the researches have indicated the fact that using synthetic antioxidants as food additives in edible oils can have adverse effects on human health. So preparing antioxidation resources for reduction of oxidation stress effects is important. The aim of this project was, representing a natural antioxidant source with frap test. The present study optimized the ultrasound assisted extracti...

natural antioxidants have an important role against damage by ros. this research had been carried out about ecological characters, phytochemical and antioxidant activity of capparis spinosa l. in semnan and golestan province. so in much field observation, different parts of c.spinosa were collected from two natural habitats in golestan (200 m) and semnan province (2100 m) during august to septe...

Interest in the antioxidant activity of bamboo leaves is growing. To discover new sources of natural antioxidants, a TLC bioautography method combined with a new image processing method was developed to evaluate the antioxidant activity of leaf extracts from 15 different species of bamboo. The results showed that the methanolic extract of Bambusa. textilis McClure possessed the highest antioxid...