Study on the compositional changes of free sugars and glucosinolates of rapeseed during germination
1988
Kim, I.S. (Wonkwang Univ., Iri (Korea R.). Dept. of Food Nutrition) | Kwon, T.B. (Chunchon Junior Coll. of Nursing and Health, Chunchon (Korea R.). Dept, of Food Nutrition) | Oh, K.S. (Kyunghee Univ., Suwon (Korea R.). Inst. of Food Development)
The objective of this study was to investigate the technical feasibility of producing toxicant-free rapeseed by germination. To this end, rapeseed (Brassica napus L.) was germinated at 25 deg C for 120 hours, and the chemical composition - glucosinolates and free sugers - was determinated after every 24 hours during germination. The amount of glucosinolates in rapeseed measured by UV method was very close to that measured by GLC method. The glucosinolates were considerably abundant in rapeseed before germination, and the total content was found to be 13.6mg/g. Rapeseed showed the lowest glucosinolate content after 72 hours during germination, and it gradually increased glucosinolate content from 96 hours. Free sugar content in rapeseed before germination was as follows: 3.03mg/g of fructose, 2.97mg/g of glucose and 5.63mg/g of sucrose. Raffinose and stachyose were not detected, and in general free sugars decreased gradually during germination. However, sucrose increased in the early period of germination and decreased in the later period
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