Microwave (MW) Energy in Enzyme Deactivation: Stabilization of Rice Bran from Few Widely Consumed Indigenous Rice Cultivars ( Oryza sativa L.) from Eastern Himalayan Range
2015
Rice bran which is an industrial cereal processing waste/by-product has great economic potential
towards developing nutraceuticals and functional foods to combat life style related diseases because
of several health beneficial biomolecules and micronutrients present in it. Utilization of food
processing waste or byproducts through sustainable development into new food has been regarded as a
potential thrust area in recent years. To exploit rice bran commercially in this area, it is of utmost importance
to stabilize freshly milled rice bran to enhance its shelf-life as it develops rancidity within
few hours of its milling due to the action of lipase and lipoxygenase (LOX) enzymes present in it.
Hence stabilization of freshly milled rice bran through inactivation of these enzymes has been a subject of much interest
to food chemistry researchers. Considering the importance of rice bran for its potential use as nutraceuticals, food
supplement and functional food, coupled with green technology associated with microwave (MW) energy in food science
and technology, we report here an expedited and convenient stabilization process of rice bran with special reference to
some of the indigenous rice cultivars grown abundantly in North East India situated in the Eastern Himalayan Range,
which is one of the global hot spots of biodiversity. The work further highlights the efficacy of MW energy in deactivating
lipase and lipoxygenase enzymes present in rice bran to give it longer shelf-life for its potential exploitation as nutraceuticals
and food supplements.
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