Studies on Physical Properties of Kidney Beans (Phaseolus Vulgaris) and Their Hydration Kinetics

Abstract

Experimental studies were conducted the Studies on Physical Properties of Kidney Beans and Their Hydration Kinetics. Physical properties viz. dimension (length, width, thickness), Arithmetic mean diameter, Geometric mean diameter, Square mean diameter, Equivalent diameter, Sphericity, Aspect ratio, Volume, Surface area, Shape factor, Bulk density, True density, Porosity, Thousand kernel mass and Angle of repose of three varieties of kidney bean (White speckled kidney beans, Red small kidney beans and Black kidney beans) were determined at dry condition and at the moisture content 12±1% (d.b.). Dimension Length, Width, Thickness varied between 1.04-1.7, 0.66-0.79, 0.49-0.58cm for three varieties of kidney beans, respectively. Arithmetic mean daimeter, Geometric mean · daimeter, Square mean daimeter and Equivalent daimeter were 0.73-1.00, 0.70-0.96, 1.23- 1.62, and 0.88-1 .19 cm2 , respectively. Sphericity and Aspect ratio ranged between 0.56-0.67 and 0.45-0.64 for kidney beans, respectively. Porosity(%) as a function of Bulk density and True density were 2.21-9.07(%) respectively. Volume, Surface area and Shape Factor varied between 0.20-0.58, 1.53-3.47 and 0.88-1.015 em, respectively. M10oo were lowest for Red small kidney beans (240g) and highest for Black kidney beans ( 499g). The angle of repose of three varieties of kidney bean ranged between 21.74-23.79°.