Studies on geometrical, physical, mechanical and colour properties of mangosteen fruits

Abstract

Abstract Geometrical, physical, mechanical, and colour properties are important parameters in the handling and processing of mangosteens. This study was carried out to form an essential database for mangosteen. The results of the study found that the polar and equatorial diameter of mangosteens were 53.95 ± 893 mm and 56.56 ± 9.88 mm, respectively, with the geometric mean diameter of 54.79 ± 9.15 mm. The weight, volume, particle and bulk densities were 97.92 ± 45.33 gr and 95.20 ± 47.57 cm3, 1.06 ± 0.16 gr/cm3 and 0.61 ± 0.02 gr/cm3 respectively. The highest skin strength of polar and equatorial diameter occurred in yellowish-green mangosteens; on the other hand, the lowest of that occurred in brownish-red mangosteens. The highest elasticity of polar and equatorial occurred in dark purple mangosteens; otherwise, the lowest of that occurred in yellowish-green mangosteens. The highest angle of repose and the static friction were 21.58 ± 4.480 and 0.40 ± 0.09, respectively, which occurred on the surface of stainless steel. The total colour difference of yellowish-green and brownish red, yellowish-green, and dark purple and brownish-red and dark purple mangosteens were 63.34 ± 5.68, 66.79 ± 4.54, and 19.95 ± 6.42, respectively.