• Preventive Nutrition and Food Science
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• 제14권1호
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• pp.71-75
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• 2009

The effects of Rhynchosia volubilis (yakong) incorporation (0%, 10%, 20%, and 30%, w/w of soybeans) on quality and shelf life of tofu were investigated. Moisture content of tofu increased slightly with the increase in the level of yakong incorporation from 10% to 30% and no apparent relationships between yakong incorporation and the yield were found. Turbidity of soybean whey tended to increase with increased level of yakong incorporation where the values of 20% and 30% samples were significantly different from those of control and 10% sample (p<0.05). The different levels of yakong incorporation were found to have significant influence (p<0.05) on all the color characteristics of tofu. Tofu texture varied with the level of yakong incorporation in consistent pattern; however, there was no significant difference (p>0.05) in most cases. Tofu incorporated with yakong ($10{\sim}30%$) had a shelf life of above at least 1 day longer than that of the control tofu.

• 산업식품공학
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• 제13권2호
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• pp.99-104
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• 2009

Tofu has been playing an important role in people's daily diet in most of Asia and recently in North America due to several health-promoting functions, preventing and treating a number of chronic diseases such as cancer, coronary heart disease and osteoporosis. The objective of this study was to investigate the effect of different levels of yakong incorporation (0, 5, 10, and 15%, w/w) in preparation of firm tofu. Quality parameters such as pH, titratable, moisture content, color, and consumer preference were determined, and their correlations were analysed. There were no significant differences in pH, titratable acidity, and moisture content due to different levels of yakong incorporation studied (p>0.05). A significant decrease in L$^{*}$ and b$^{*}$-values whereas significant increase in a$^{*}$-value was observed (p<0.05). Five percent yakong tofu received the most favorable mean scores with respect to color, texture, and overall acceptability. Correlation analysis revealed that yakong incorporation was well correlated with some of physicochemical properties as well as consumer preference.

• 한국식품조리과학회지
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• 제21권6호통권90호
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• pp.844-849
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• 2005

국내산 대두 품종 황금콩, 약콩, 흑태에 대하여 일반 성분, 지방산조성, 아미노산. isoflavone, 대두올리고당. phytic acid 함량을 조사하였다. 일반성분은 수분 10.9-$12.5\%$, 조단백질 36.5-$41.1\%$, 조지방 15.8-$20.8\%$ 및 회분 5.4-$5.6\%$의 범위의 함량을 나타내었다. 총 지방질의 지방산은 시료 콩 모두에서 linoleic acid이 가장 많았으며, oleic acid, palmitic acid 순으로 이들 세 지방산이 $80\%$이상을 차지하였다. 콩의 주요 아미노산인 Iysine 함량은 황금콩(56.5 mg/g protein)이 가장 많이 함유되어 있었고, 그 다음 흑태가 55.2 mg/g protein였고, 약콩은 48.2 mg/g protein을 함유하였다. 콩에 가장 적게 함유되어 있는 아미노산은 methionine인 것으로 나타났고 다음으로는 cysteine, histidine 순으로 적게 나타났다. 시료의 isoflavone 함량($\mu$g/g soybean)은, 약콩(2491.4), 황금콩(2176.8) 그리고 흑태(1893.5) 순으로 높게 나타났다. 올리고당 함량은 12.2-$16.1\%$로 약콩이 가장 높은 함량을 보였다 대두의 phytic acid 함량도 황금콩 $2.63\%$, 약콩 $2.12\%$, 흑태 $2.80\%$로 품종간에 큰 차이를 나태내지 않았다.