Bhat Farhan M, Riar Charanjit S
Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal, Punjab 148106 India.
J Food Sci Technol. 2016 Dec;53(12):4258-4269. doi: 10.1007/s13197-016-2420-8. Epub 2016 Dec 19.
The aim of present research was to evaluate physical and engineering properties of traditional paddy and rice cultivars native to temperate region of India. Length, width, thickness, equivalent diameter, surface area, aspect ratio, volume, bulk density, true density, porosity, thousand kernels weight, angle of repose and coefficient of friction were evaluated, which are required in designing of various post harvest operations and storage structures. The low bulk density of cultivars, and may be due to the presence of long awns possessed by these cultivars which were bulky and occupied more space. The wide variations were found in rice kernels with respect to colour, which determined the functional properties and energy requirement during polishing of these cultivars. Results indicated significant differences in the physical properties among various paddy and brown rice cultivars when compared with earlier reported results. Thousand kernel weight, width, arithmetic mean diameter and equivalent diameter showed significant positive correlations with spherecity, surface area, volume, true density, and angle of repose; but negatively correlated with bulk density. These desirable characteristics exploit agriculturists/institutions to preserve these races and encourage farmers to cultivate these cherished rice cultivars.
本研究的目的是评估印度温带地区本土传统水稻品种的物理和工程特性。对长度、宽度、厚度、等效直径、表面积、纵横比、体积、堆积密度、真密度、孔隙率、千粒重、休止角和摩擦系数进行了评估，这些都是设计各种收获后操作和储存结构所必需的。品种 和 的堆积密度较低，可能是由于这些品种带有长长的芒，芒体积大，占据了更多空间。水稻籽粒在颜色方面存在很大差异，这决定了这些品种在抛光过程中的功能特性和能量需求。结果表明，与早期报道的结果相比，各种水稻和糙米品种的物理特性存在显著差异。千粒重、宽度、算术平均直径和等效直径与球形度、表面积、体积、真密度和休止角呈显著正相关；但与堆积密度呈负相关。这些理想的特性促使农业学家/机构保存这些品种，并鼓励农民种植这些珍贵的水稻品种。
