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KMID : 0903519900330010008
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1990 Volume.33 No. 1 p.8 ~ p.13
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Comparison Study of Extraction Properties of Solids , Protein and Color Pigments of Several Soybean Varieties
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Abstract
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The solid and protein yields and extraction properties of color pigments were compared for 7 varieties of soybeans during soaking in water at 4-100℃. The varieties investigated were Paldal, Danyeob, ,Jangbaek, Baegun, Jangyeob and 2 cultivars of Local 1 and Local 2. The Hunter values showed that Jangbaek was the highest in ´L´ value while other varieties except Local 1 and Local 2 were comparatively high in `L´ value. Local 1 and Local 2 were low in `b´ value. The yields of solid and protein during water extraction showed that most of solids and proteins were recovered with three consecutive extractions. The cumulated yields were 73.2 % for solid and 83.2 % for protein. Extraction of color pigments of seed coats in 4-100℃ water showed that the extraction rate was very much dependent on extraction time and temperature. A linear relationship of A=aT+b was obtained for equilibrated absorbance(A) and extraction temperature(T). The activation energy calculated from initial extraction rate of color pigments and temperature had two different values of low(4-60℃ and high(60-100℃) temperature range.
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