Yellow soybean hulls (Glycine max) were collected after soybean
germination. The hulls were rinsed with water. The moisture content was around 40 ± 5%. The unprocessed and dried soybean
hull powders were named soybean hull control (SBH-C), while
the processed and dried soybean hull powders were soybean hull
treatment (SHB-T).
2.2. Chemicals and reagents
Alpha amylase, protease, amyloglucosidase wer purchased from
Megazyme International Ireland Limited (Bray, Co. Wicklow,
Ireland). Ethanol, acetone, and diethylene glycol were from Fisher
Scientific (Fair Lawn, NJ). Other chemicals were obtained from
Sigma Chemical Co. (St. Louis, MO).