Aim of study is to get a further insight on the contribution of the structural features to the radical scavenging potential of shikonin and its ester derivatives. The radical scavenging activity of shikonin and its ester derivatives have been studied by using density functional theory. The hydrogen bond property of the studied structures has been investigated by using the Atoms in Molecules (AI...

Daylilies (Hemerocallis disticha) are very popular for vegetarian cuisine in Taiwan and have been long used as a nutritious food and/or traditional medicine in Chinese society. Therefore, the antioxidant capacity of daylily flowers was investigated with a number of established in vitro assays. The results showed that DPPH radical scavenging activity, hydrogen peroxide scavenging activity, super...

A free radical scavenging activity is an important property of natural dietary compounds, caffeine and caffeic acid compound widely present in many fruits, vegetables and coffee. The present study focused on determining the antioxidant activity of caffeine, caffeic acid and (caffeine + caffeic acid) through invitro antioxidant experiments. Invitro lipid peroxidtion, 1,1diphenyl-2-picryl-hydrazy...

the antioxidant potential of crude methanol extract (ce) as well as chloroform (cf), ethyl acetate (ef) and n-butanol (nf) soluble fractions of enhydra fluctuans lour, which is widely used in indigenous system of medicine for different purposes, were studied. the antioxidant potential of extract/different fractions were evaluated using different in vitro antioxidant models. in addition, total a...

background: safety and efficacy of the synthetic antioxidants used in the food industry are frequently questioned because such antioxidants are unstable and highly volatile, therefore, interest in finding naturally occurring antioxidants that have the potential to protect human beings from damage induced by oxidative stress has intensified. objective: bioactivities of thymus daenensis and aneth...

the majority of the antioxidant and antidiabetic activities of fruits are anthocyanins, a group of polyphenolics that are responsible for the color of many fruits, vegetables and flowers. the harvesting time, storage conditions, maturity, extraction steps etc. are very important for the biological activities based on the alteration of chemical composition. the free radical scavenging and antidi...

objective: the present study was an attempt to study total phenolic content and antioxidant property of the crude ethanolic extract of the roots of azadirachta indica (a. indica). materials and methods: to evaluate the antioxidant properties of the crude extract, some complementary test systems, namely dpph free radical scavenging assay, reducing power assay, and ferrous ion chelating ability a...

the effect of different solvent systems on the extraction of antioxidant and anti radical agents of grape seed was studied. for this purpose 6 different solvent systems with similar polarity and different selectivity were used to prepare grape seed extract. extraction efficiency, reducing activity, radical scavenging property and the effect of each extract on the increase of thermal resistance ...

The effect of allyl isothiocyanate (AITC) on radical scavenging capacity, and fruit decay of blueberries var. Duke (Vaccinium corymbosum L.) was evaluated. Results from this study showed that AITC was effective in retarding blueberry decay during storage at 10 C. However, AITC-treated fruit decreased the contents of total phenolics and anthocyanins. Compared to control, AITC-treated berries had...