Influence of ultrasonic treatment on the quality of jujube (Zizyphus mauritiana Lamk.) extract cultivars
Journal Title: Journal of Agricultural and Crop Research - Year 2016, Vol 4, Issue 7
Abstract
In the present study, effect of ultrasonic treatment (80% amplitude level (400 W power), 24 kHz frequency, 5 min, 20°C) on the total phenolics and flavonoids, vitamin C contents, radical scavenging capacity (DPPH), total antioxidant activity (TAC), reducing power, total plate count (TPC), yeast and mould (Y & M) of water soluble extracts of five seasonal cultivars of Jujube, were investigated. The physical and chemical characteristics of Jujube cultivars were also monitored in the study. It was observed that ultrasonic treatment significantly (P < 0.05) improved the total phenolics and flavonoids, vitamin C contents, DPPH radical scavenging capacity, TAC and reducing power of water soluble extracts of Jujube cultivars. Moreover, significant (P < 0.05) reduction of TPC, Y & M was found after ultrasonic treatment. The results suggest that ultrasonic treatment may be applied to improve the nutritional value especially the antioxidant potential of jujube cultivars.
Authors and Affiliations
Tahir Mahmood Qureshi, Muhammad Nadeem, Sarfraz Hussain, Mian Nadeem Riaz
Keywords
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