Mineral composition of different rice varieties and their milling fractions
2007
Anjum, F.M. (University of Agriculture, Faisalabad (Pakistan). Inst. of Food Science and Technology) | Pasha, I. (University of Agriculture, Faisalabad (Pakistan). Inst. of Food Science and Technology) | Bugti, M.A. | Butt, M.S.
Four Pakistani coarse rice varieties namely Irri-6, Irri-9, Sarshar and DR-83 were milled to obtain different fractions viz. brown rice, white rice, polished rice, bran and polishing. Chemical components such as moisture, ash, fat, fiber and NFE differed significantly due to differences in milling fractions as well as rice cultivars. The highest protein content was observed in the rice cultivar Sarshar (8.80%) followed by Irri-6 (8.77%) while among the different milling fraction, the maximum protein content was found in bran (11.71%). The highest ash content was found in Sarshar (3.79%) whereas among different milling fractions it was higher in bran (6.04%). Mineral contents were significantly higher in bran followed by polishing. Iron, zinc, manganese, copper contents ranged from 0.59 to 3.98 mg/100g, 1.12 to 4.69 mg/100g, 0.51 to 5.12 mg/1008, 0.28 to1.69 mg/100g respectively among different milling fractions. The mineral contents ranged fro m 1.57 to 1.94 mg/100g, 1.44 to 2.97 mg/1008, 1.57to 2.33 mg/100g and 0.58 to 0.92 mg/100g among different varieties. Volume expansion ratio and water absorption ratio was higher in Sarshar (3.15 & 2.31) among varieties and in polished rice (3.50 & 2.65) among the fractions. The rice varieties Sarshar and Irri- 6 must be given more attention by the rice breeders to use in their hybridization programs as these varieties exhibit more proteins and minerals which are required to maintain normal body metabolism.
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