Antioxidant Potential of the Polyphenolics in Grewia asiatica, Eugenia jambolana and Carissa carandas

Autor:	Shagufta Ishteyaque, Khalid Jamil, Shahina Naz, Muhammad Samee Haider, Omer Mukhtar Tarar, Rahmanullah Siddiqi, Syed Asad Sayeed
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Antioxidant biology Chemistry DPPH medicine.medical_treatment food and beverages Phenolic acid biology.organism_classification chemistry.chemical_compound Flavonols Polyphenol Anthocyanin Botany medicine Grewia asiatica Food science Carissa carandas
Zdroj:	Journal of Agricultural Science. 5
ISSN:	1916-9760 1916-9752
Popis:	The fruits G. asiatica , E. jambolana and C. carandas were extracted with methanol and the extracts were partitioned into four polyphenolic fractions: Flavanols, flavonols, phenolic acids and anthocyanins using solid phase extraction. Each fraction was then analyzed for total phenolics, flavonoids, antioxidant activity by DPPH, beta-carotene-linoleic acid assay and total reducing power. Total phenolics ranged 6.64-107, 56.20-398, 33.38-315 and 20-201 mg/100 g in phenolic acid, flavanol, flavonol and anthocyanin fractions respectively of these fruits which explained the order of their antioxidant activity and reducing power as flavanols > flavonols > anthocyanins > phenolic acid. Total phenolics were highest in E. jambolana fractions (107-398 mg/100 g) but the maximum antioxidant activity (62-85% in 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 58-89% in ?-carotene-linoleic acid assay) was shown by the fractions in G.asiatica (total phenolics, 67-151 mg/100 g). At all concentrations, the DPPH scavenging activity of flavanol fraction in G . asiatica (85% at 20 ppm) was comparable to BHA (89%).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f11c6d2ac2425beb2a0370fb47219356 https://doi.org/10.5539/jas.v5n3p217 Zobrazit plný text záznamu