the pomegranate seeds of four iranian commercial varieties  (abanmahi (ab), malas (ms), pust sefid (ps) and shahvar (sh)) were evaluated in terms of some quality properties including protein, oil, dietary fiber, mineral contents and fatty acid composition. physicochemical properties and antioxidant activity of pomegranate seed oils (psos) were also determined. the oil antioxidant activity was m...

Lysimachia laxa is a perennial herb belonging to the family Primulaceae and Gymnocladus assamicus is a critically endangered species of the family Caesalpinioideae contain biologically active substances. The present investigation deals with the evaluation of antioxidant activity of the different parts of these two plants and to determine the best solvent for extracting the antioxidant component...

antioxidants are vital substances which possess the ability to protect the body from damage caused by free radical induced oxidative stress. a variety of free radical scavenging antioxidants exist within the body which many of them are derived from dietary sources like fruits, vegetables and teas. in this study the antioxidant activity and radical scavenging activity of methanolic extracts of s...

This study was conducted to evaluate the increase of DPPH radical scavenging activity of meat substitute by heating. The meat substitute showed higher DPPH radical scavenging activity than those of other foods rich in protein such as beef, pork, chicken, and soybean curd. The DPPH radical scavenging activity of meat substitute was dependent upon concentration, heating temperature and heating ti...

The aim of this work was to investigate the antioxidant property of honeybee products and their constituents using an ESR method. Antioxidative activity was evaluated as the scavenging activity of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The DPPH radical scavenging activities, in descending order, were: ethanol extract of Chinese red propolis>ethanol extract of Brazilian green propolis>wat...

Macrocyclic Schiff bases have been synthesized by the condensation of acetyl acetone with semicarbazide hydrochloride and thiosemicarbazide in presence of methanol. Further, their oxovanadium complexes have been synthesized by using vanadium acetylacetone. The structural assignment of these compounds has been made on the basis of MP, TLC, MW determination, conductivities, elemental analysis and...

The methanol extract of the dried ripe fruits of Alpinia rafflesiana was investigated for its DPPH free radical scavenger constituents. 2',3',4',6'-Tetrahydroxychalcone (7), which has never been isolated from natural sources was found to be most active as a DPPH free radical scavenger with the IC50 value of 55 microM. Other known compounds isolated from this species include 5,6-dehydrokawain (1...

The reaction of 2,2-diphenyl-1-picrylhydrazyl free radical (DPPH) with active species of oxygen (hydrogen peroxide, tert-butyl peroxide, tert-butyl hydroperoxide, sodium peroxide, potassium superoxide, hydroxyl radical, tempo free radical, galvinoxyl free radical, Fremy’s salt, mchloroperbenzoic acid, potassium hydroxide, and sodium peroxynitrite) was reviewed and the new obtained results compa...

Radical Scavenging capacity Abstract: In-vitro antioxidant activity of methanolic extract of Rhinacanthus nasutus leaves was determined by DPPH free radical scavenging assay and Reducing Power assays. Ascorbic acid was used as standard and positive control for both the analysis. All the analysis was made with the use of UV-Visible Spectrophotometer. The methanolic extract of Rhinacanthus nasutu...

The demonstrated modified spectrophotometric method makes use of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and its specific absorbance properties. Theabsorbance decreases when the radical is reduced by antioxidants. In contrast to otherinvestigations, the absorbance was measured at a wavelength of 550 nm. This wavelengthenabled the measurements of the stable free DPPH radical without int...