Indian medicinal herbs as sources of antioxidants
ABSTRACT Currently there has been an increased interest globally to identify antioxidant compounds that are pharmacologically potent and have low or no side effects for use in preventive medicine and the food industry. As plants produce significant amount of antioxidants to prevent the oxidative stress caused by photons and oxygen, they represent a potential source of new compounds with antioxidant activity. Traditional herbal medicines form an important part of the healthcare system of India. Ayurveda, supposed to be the oldest medical system in the world, provides potential leads to find active and therapeutically useful compounds from plants. Considering the growing interest in assessing the antioxidant capacity of herbal medicine in this review we discuss about rarely reviewed 24 plants reported to have antioxidant properties. Some of the plants reviewed are part of multi-herbal preparations while others are used singly. Certain herbs like Amaranthus paniculatus, Aerva lanata, Coccinia indica and Coriandrum sativum are used as vegetables indicating that these plants could be source of dietary antioxidant supplies, which is another emerging area of research.
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ABSTRACT: The herb and seed spices were analysed for their tannins content by titrimetric method; rutin was determined spectrophotometrically by using ammonium molybdate; the total phenolic contents were determined by using Folin-Ciocalteu assay; the total flavonoids were measured spectrophotometrically using the colorimetric reaction with aluminum (III) chloride. Antioxidant capacity was also analysed spectrophotometrically by a 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging effect of the herbs and seeds.Indian Journal of Horticulture 12/2014; 4((3/4)):131-140. · 0.13 Impact Factor
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ABSTRACT: This study deals with evaluating antioxidant and antimicrobial activities of the peel of pea (Pisum sativum), with particular attention to the content of some bioactive compounds. Total content of polyphenols and flavonoids of Pisum sativum peel extracts, including a crude aqueous extract, a methanolic extract and an ethyl acetate extract was carried out according to the standard methods to assess their corresponding antioxidant activities. The organic solvents extracts antioxidant activities, determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay, ferric reducing (FRAP) assay and 2,2 azinobis 3-ethylbenzo-thiozoline-6-sulfonic acid (ABTS) assay, were relatively high. The highest activity was found in ethyl acetate extract. The antimicrobial activities of extracts were also assessed. The highest MIC value was occurred with E.Coli (850 µg/ml) when using ethyl acetate extract. From the results obtained, Pisum sativum peel can be considered as a very good source of health promoting compounds.Journal of oleo science 01/2014; 63(11):1177-83. · 1.24 Impact Factor
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ABSTRACT: In order to find new sources of natural antioxidants, the methanolic extracts of eleven Algerian medicinal plants from eight botanical families were investigated for their in vitro antioxidant activity using total antioxidant capacity (TAC), reducing power, 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl radical scavenging and β-carotene–linoleate bleaching. The total phenolic, flavonoid and tannin contents were also measured. Most of these plants were analyzed for the first time for their antioxidant activities. Results showed that the plants Pistacia atlantica, Thymelaea microphylla and Marubium deserti exhibited higher phenolic content (133.74 to 285.95 mg gallic acid equivalents/g dry matter). The flavonoid and tannin contents varied from 0.56 to 12.44 mg catechin equivalents/g dry matter and 1.42 to 25.02 mg catechin equivalents/g dry matter, respectively. The extracts were found to have different levels of antioxidant properties in the test models used. The medicinal plants with the highest antioxidant activities were Pistacia atlantica, Helianthemum lippii (stem, leaf, and fruit), Inula montana, Anabasis articulata and Sedum villosum. A positive correlation, R2 = 0.906, was observed between total the flavonoid content and TAC values, reflecting a high involvement of flavonoids in antioxidant activity, but no correlation was established between the five tests and the total phenolic and tannin contents.Journal of medicinal plant research 10/2014; 8(40). · 0.59 Impact Factor