Effect of gamma irradiation on the microbial load,nutrient composition and free radical scavenging activity of Nelumbo nucifera rhizome |
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| Affiliation: | 1. School of Chemistry, University of Bristol, BS8 1TS, Bristol, UK;2. Food Science Division, Nuclear Institute for Food and Agriculture (NIFA), Tarnab, Peshawar, Pakistan;1. Hawassa University, College of Agriculture, P.O. Box 5, Hawassa, Ethiopia;2. Haramaya University, P.O. Box 241, Haramaya, Ethiopia;3. University of Natural Resources and Life Sciences, Vienna (BOKU), Department for Agrobiotechnology (IFA-Tulln), Konrad Lorenzstr. 20, A-3430 Tulln, Austria;4. Institute of Sciences of Food Production, National Research Council, Via Amendola 122/0, 70126 Bari, Italy;1. Department of Food Science and Technology, University of Kashmir, Sgr 190006, India;2. Department of Food Engineering and Technology, SLIET, Punjab, India;1. Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute (NARS-NSTRI), Karaj 31485/498, Iran;2. Department of Plant Protection, College of Agriculture and Natural Resources, University of Tehran, Karaj 31587-77871, Iran;1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China;2. Jiangxi Normal University, Nanchang, Jiangxi 330022, China;1. Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Selangor, 43400 Serdang, Malaysia;2. Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Malaysia;3. Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia |
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| Abstract: | The assurance of microbial quality is necessary to make plant materials suitable for human consumption and commercialization. The aim of the present study was to evaluate the possibility to apply the gamma radiation treatment on the rhizome samples of Nelumbo nucifera for microbial decontamination. The radiation processing was carried out at dose levels of 1, 2, 4 and 6 kGy. The irradiated and control samples were analyzed for microbial load, organoleptic acceptance, extraction yield, proximate composition, phenolic contents and DPPH scavenging activity. The results indicated that gamma radiation treatment significantly reduced microbial load and increased the storability of the irradiated samples. The treated samples were also acceptable sensorically. The extraction yield and phenolic contents increased with the increase of radiation dose. Gamma radiation also enhanced the DPPH scavenging activity. |
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