Physical Properties of Sunflower Seeds

✍ Scribed by R.K. Gupta; S.K. Das

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 378 KB
• Volume: 66
• Category: Article
• ISSN: 0021-8634
• DOI: 10.1006/jaer.1996.0111

✦ Synopsis

Physical properties of sunflower seeds and kernels were evaluated as a function of moisture content . At 6 и 2% m . c . d . b ., the average length , width , thickness and unit mass of the seed were 9 и 52 mm , 5 и 12 mm , 3 и 27 mm and 0 и 049 g respectively . Corresponding values for the kernel were 8 и 28 mm , 4 и 09 mm , 2 и 43 mm and 0 и 034 g . The mean equivalent diameter and sphericity of the seed were 5 и 39 mm and 0 и 57 respectively , while corresponding values for the kernel were 4 и 32 mm and 0 и 53 . In the moisture range from 4 -20% d . b ., the bulk density of the rewetted seed decreased from 462 to 434 kg / m 3 , true density in- creased from 706 to 765 kg / m 3 , porosity increased from 34 и 3 to 43 и 3% and terminal velocity increased from 5 и 8 to 7 и 6 m / s . For the kernel the corresponding values changed from 574 to 628 kg / m 3 , 1050 to 1250 kg / m 3 , 45 и 4 to 50 и 2% and 3 и 5 -5 и 8 m / s . In the same moisture range the static coef ficient of friction varied from 0 и 40 to 0 и 58 for seed and from 0 и 43 to 0 и 81 for kernel on dif ferent surfaces , while the angle of respose varied from 34 to 41 Њ for seed and 27 to 38 Њ for kernel .