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Effect of gamma radiation on antioxidant marker and microbial safety of fresh bitter gourd (Momordica charantia L.)

Afifa Khatun, Afzal Hossain, Mahfuza Islam, Arjina Hossain, Kamruzzaman Munshi, Roksana Huque

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Int. J. Biosci.2(11), 43-49, November 2012


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Bitter gourd (Momordica charantia L.) is one of the most popular vegetables in some Asian countries for their antioxidant properties and bioactive compounds to lower of diabetic diseases. The Objective of this study was to investigate the effect of gamma radiation on the antioxidant marker compounds (total phenol content, flavonoid content and ascorbic acid content) of fresh bitter gaurd. Microbial safety (total bacterial count, total coliform count, and total Salmonella count) was also examined. Phenolic content was significantly (p < 0.05) higher in bitter gaurd irradiated with 0.25 kGy compared to the control. Increased flavonoid content was observed in irradiated sample (0.25 and 0.5 kGy) compared to control sample. Ascorbic acid content decreased significantly with the increase of irradiation doses. Gamma irradiation (0.25 and 0.50 kGy) significantly reduced the microbial count in bitter gourd to keep the samples microbiologically safe.


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