School of Graduate Study Department of Chemical Engineering

4.1 Cracking and dehulling
Chapter 4
Result and Discussion
The amount of hull removed from the Clark 63K and SCS1 was 12.46% and 8.52% respectively. See
table 4.1.
Table 4.1
Amount of hull removed from Clark 63K and SCS1 varieties after cracking and dehulling
process
Sr.No Proportion of parts of
Clark 63k
SCS 1
the Soy bean
[%]
[%]
1 Cotyledon and hypocotyls 87.54 91.48
2 Hull 12.46 8.52
3 Whole bean 100 100
4.2 Physico-chemical properties
The general physical characteristics of Clark 63k and SCS1 are listed in table 4.2.Accordingly the
result of color and shape, 100 seed mass and seed density are described below.
4.2.1 Color and shape
Regarding the physical characteristics of the two varsities (Clark63k and SCS 1), both varieties have
industrial quality characteristics. Basically, industrial quality characteristics of soybeans are yellow
in color and spherical in shape (Berk, 1992). Regarding hilum color, SCS1 has Yellow color where
as Clark 63K has black hilum color. Traditionally, many processors prefer yellow hilum color
soybeans to avoid any color effect due to a darker hila on the final product (Tofu, Soymilk,
Natto,etc.) (Brumm, 2006)
4.2.2 Hundred seed mass and seed density
Hundred seed mass
In case of 100 seed mass, the Clark 63k and SCS 1 are found having about 15.198 gm/100 seeds and
15.531 g/100 seeds, respectively. These values are not significantly different (p