Evaluation of climatic and geographical effects on bioactive compounds and minerals profile of two selected samples of white turnip

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Tahir Mehmood*, Shehla Bashir, Faiza Siddique Mudassir Iqbal Zahra Jabeen Hina Arshad

Abstract

With the rise of various disorders in human beings related with free radicals perceived to recompense the scrutiny on synthetic and natural antioxidants to control the numerous perilous ailments and other carcinogenic hazardous diseases. Vegetables and fruits are the major source of natural antioxidants because these are majorly composed of natural antioxidants. Therefore, current study was carried out to focus on the significance and assessment of antioxidants in the ethanol and methanol extracts of turnip peels. Turnip samples were collected from two different regions of Pakistan i.e. Soon Valley and Sargodha region. Further two different solvent systems i.e. Methanol and Ethanol were used for each variety of turnip. Evaluated the antioxidant activity through DPPH (2, 2-diphenyl-1-picrylhydrazyl) radical scavenging activity, total flavonoid contents, determined the total phenolic contents via Folin-Ciocalteu method and reducing power assay. Estimation of mineral profile was done by wet digestion method. In the samples of turnip percentage yield of methanolic extracts exhibited maximum antioxidant activity as compared to ethanolic extracts. Analysis of results revealed that methanolic extract of Sargodha region turnip possessed maximum concentration of TPC (Total pheolic content) as compared to the 80% ethanolic extract of soon valley region. In 100% methanolic extract radical scavenging activity exhibited maximum % inhibition as compared to ethanolic extract. In the extracts of turnip peels 100% methanol exhibited greater reducing potential. Mineral composition and levels vary across two different samples of turnip indicated the maximum concentration of minerals in Sargodha region turnip. As a consequence of this study solvents that were used possessed significant results (P<0.05) for the antioxidant compounds extraction from turnip samples.


Keywords: Turnip; Antioxidant potential; Reducing powers; Moisture content; Minerals profile


http://dx.doi.org/10.19045/bspab.2017.60030

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