Background & Aims: Plants contain high antioxidant activities due to their redox and the chemical properties are affluent in secondary metabolites such as phenols, flavonoids, and other components. Rheum turkestanicum Janisch is a plant from polygonaceae that is widely used for diabetes. At this project that is a part of national thesis, relative levels of antioxidant activity, total phenols, t...

?-amylase inhibitory activities of ethanol extracts from six selected iranian salvia species (s. hydrangea dc., s. hypoleuca benth., s. officinalis l., s. reuterana boiss., s. verticillata l. and s. virgata jacq.) were examined, using in vitro model. in addition, antioxidant capacities (dpph• radical scavenging) and total flavonoid cotents of the extracts were also determined. the results showe...

Background: Avocado is a plant that can grow in tropical climates. In general, people only consume the fruit while skin and seeds are not used. fruit, contain secondary metabolites such as flavonoids tannins which have antioxidant activity. Objective: To determine activity, total flavonoid, tannin content of ethanol extract avocado peel. Methods: P. americana Mill. was collected from Lubuk Ling...

The uncontrolled production of oxygen free radicals and the unbalanced mechanism antioxidant protection results in onset many diseases, such as cancer, diabetes, Alzheimer's, heart diseases aging. Artocarpus lacucha Buch-Ham. belongs to family Moraceae, popularly regarded a medicinal plant commonly called monkey jack. This is widely distributed tropical regions south south-east Asia. aim this s...

Honey is a well-known natural sweetener and rich in antioxidants that prevent the occurrence of oxidative stress, which responsible for many human diseases. Some biochemical compounds honey contribute to this property are vitamins phenolic such as acids flavonoids. However, extent these molecules towards antioxidant capacity vitro inconsistently reported, especially with different analytical me...

the antioxidant and cytotoxic properties of four major parts of methanolic extracts of tephrosia purpurea including leaves, root, stem and seed were investigated and compared. in vitro antioxidant activity of t. purpurea extracts was evaluated using 1,1-diphenyl-2-picrylhydrazyl (dpph), ferric reducing antioxidant power (frap), reducing power assay and antihemolytic assay. in vitro cytotoxic ef...

Total flavonoid and phenolic content, antiradical properties and external flavonoid profiles on extracts of six samples of flower heads of cultivated Arnica montana was assessed. The studied samples were compared in relation to location of cultivation, origin of the seeds, time of harvesting, method of propagation: in vitro and in vivo. Four flavonoid aglycones were detected of examined exudate...

The present study aimed to investigate the total phenolics, flavonoids, and antioxidant activity in terms of DPPH scavenging, reducing power, H2O2 scavenging aerial parts onion, white radish, red carrot, beet as affected by different extraction solvents. Generally, part these vegetables has high properties. Samples were extracted with methanol (100 70%), ethanol water. Total phenolic content wa...

Sunflower (Helianthus annuus L.) is largely consumed in Iran as an oleaginous and confectionery product. In this study, the total phenolic and flavonoid contents, antioxidant activity and phenolic composition in different parts of the seeds from six sunflower genotypes were investigated. The antioxidant activity of extract was evaluated by different assays. The total phenolic and flavonoid cont...