Seasonal discrepancy in the antioxidant potential from bark of Nothapodytes nimmoniana was evaluated using two different methods (DPPH and FRAP) and were related to total phenolic content as well as flavonoid content. Higher yield of phenolic and flavonoid were observed during summer (May) similarly, the antioxidant activities (DPPH & FRAP) also were high. The antioxidant activities were strong...

Strawberries can augment plasma antioxidant activity, but this may be confounded by selection of methods, time of blood sampling and concomitant dietary restrictions. We examined the effect of strawberry consumption on ferric reducing ability (FRAP) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (DPPH-test) of native and non-urate plasma in healthy subjects on their usual ...

Comparative analysis of antioxidant capacity was performed using FRAP and DPPH methods on extracts containing carotenoids acquired from fruits of Sea buckthorn. The examination included nine varieties of Sea buckthorn growing in the comparative cultivation. Conducted analysis allowed to compare the antioxidant capacity with carotenoids content measured with spectrophotometric and HPLC methods. ...

Guava fruit extracts were analyzed for antioxidant activity measured in methanol extract (AOAM), antioxidant activity measured in dichloromethane extract (AOAD), ascorbic acid, total phenolics, and total carotenoids contents. The ABTS, DPPH, and FRAP assays were used for determining both AOAM and AOAD, whereas the ORAC was used for determining only AOAM. Averaged AOAM [mM Trolox equivalent (TE)...

Accepted: 08/06/2014 Abstract Six variety of betel leaf from different domain of India were extracted using five solvents in order to determine the effect of solvent and changing variety on total phenol content and antioxidant activity. Antioxidant activity was determined using DPPH, ABTS, FRAP, PCL (Photochemluminiscence) assay. However 80% methanol for TPC, 80% ethanol followed by 80% methano...

Antioxidant activity of aqueous, ethanolic and methanolic extracts of two common vegetables of North-eastern states of India, Parkia javanica and Phlogacanthus thyrsiflorus have been estimated by three different methods: DPPH free radical scavenging, FRAP and Ascorbate-Iron (III) induced lipid peroxidation inhibition assay. The activity was expressed as both mg trolox and ascorbic acid equivale...

background and objectives:alzheimer’s disease (ad) is a neurodegenerative disorder. nowadays, many investigations are performed to find new drugs for ad and medicinal plants are considered as one of the most important sources for developing new drugs. according to the role of oxidant agents and acetylcholinesterase enzyme (ache) in ad, plants with antioxidant and ache inhibition properties coul...

background and objectives:lallemantia iberica (lamiaceae) is a medicinal plant distributed in different parts of iran. this research, has evaluated the phytochemical constituents and antioxidant activity of the aerial parts of the plant. methods: different chromatographic methods such as column chromatographies using silica gel (normal and reversed phases), sephadex lh-20 and hplc were used for...

Vasicine (1) was isolated from the ethanolic extract of Adhatoda vasica Nees (Acanthaceae) and the structure was confirmed using spectroscopic techniques. Acetylcholine esterase, trypsin, DPPH inhibition potential and FRAP assay were carried out using in vitro models. The results showed 38.4 ± 1.2% and 37.4 ± 1.1% activity in acetylcholine and trypsin inhibition assays respectively. The compoun...

Plant foods are important due to their antioxidant activity (AOA) attributed to the phenolics which are known to protect organisms against harmful effects of oxygen radicals. However, information on antioxidant activity of Indian plant foods is scanty. Therefore, the present study evaluated the AOA of cereals, millets, pulses and legumes, commonly consumed in India and assessed the relationship...