Department Of Applied Agriculture

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Author: search.filters.author.Kaur, AmritpalSubject: search.filters.subject.Antioxidants

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    Composition, bioactive compounds and antioxidant activity of common Indian fruits and vegetables
    (Springer India, 2016) Singh,Jatinder Pal; Kaur, Amritpal; Shevkani, Khetan; Singh, Narpinder
    The present work was undertaken to evaluate the chemical composition (proximate, minerals and dietary fibre), colour parameters, antioxidant activity and polyphenol profiles of different fruits (pomegranate, kinnow, mango, banana, jambolan, grapes and sapodilla) and vegetables (beetroot, brinjal, orange carrot, bitter gourd, mentha and spinach). The amount of insoluble dietary fibre was higher than soluble dietary fibre for all fruits and vegetables. Vegetables showed superior mineral composition (higher amounts of K, Ca and Fe) as compared to fruits. Total phenolic content (TPC) and antioxidant activity (ABTS and DPPH) ranged from 354.9 to 1639.7?mg?GAE/100?g, 2.6 to 5.5 and 3.0 to 6.3?mM?TE/g, respectively for different fruits, while it ranged from 179.3 to 1028.6?mg?GAE/100?g, 2.1 to 4.7 and 2.0 to 5.0?mM?TE/g, respectively for different vegetables. Gallic acid, protocatechuic acid, catechin, caffeic acid, ferulic acid, sinapic acid, quercetin, resveratrol and kaempferol were detected and quantified in different fruits and vegetables. The results highlighted that fruit peels could be used as valuable sources of minerals and polyphenols having high antioxidant activity. ? 2016, Association of Food Scientists & Technologists (India).
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    Bioactive constituents in pulses and their health benefits
    (Springer India, 2017) Singh,Balwinder; Singh, Jatinder Pal; Shevkani, Khetan; Singh, Narpinder; Kaur, Amritpal
    Pulses are good sources of bioactive compounds such as polyphenols, phytosterols and non-digestible carbohydrates that play important physiological as well as metabolic roles. These compounds vary in concentration amongst different pulse species and varieties. Pulse seed coats are rich in water-insoluble fibres and polyphenols (having high antioxidant activities), while cotyledons contain higher soluble fibres, oligosaccharides, slowly digestible and resistant starch content. Ferulic acid is the most abundant phenolic acid present in pulses, while flavonol glycosides, anthocyanins and tannins are responsible for the seed coat colour. Sitosterol (most abundant), stigmasterol, and campesterol are the major phytosterols present in pulses. Pulse fibres, resistant starch and oligosaccharides function as probiotics and possess several other health benefits such as anti-inflammatory, anti-tumour, and reduce glucose as well as lipid levels. Beans and peas contain higher amounts of oligosaccharides than other pulses. Processing methods affect resistant starch, polyphenol composition and generally increase antioxidant activities of different pulses. In this review, the current information on pulse polyphenols, phytosterols, resistant starch, dietary fibre, oligosaccharides, antioxidant and associated health benefits are discussed. ? 2016, Association of Food Scientists & Technologists (India).