7 research outputs found

    직접메탄올 연료전지용 고효율 백금촉매 및 니오비아가 첨가된 백금촉매의 개발

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    학위논문(석사) --서울대학교 대학원 :화학생물공학부,2008.2.Maste

    Optimum Conditions for the Separation of Lecithin, from Egg Yolk by Response Surface Methodology

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    The optimum conditions for the extraction of lecithin from egg yolk were determined using response surface methodology (RSM). On the basis of the results of preliminary experiments, the most effective values were selected. The effects of three independent variables, dilution ratio. solvent composition, and extraction temperature on the response of crude egg lecithin (2) were then determined. The optimum conditions for egg lecithin separation obtained using ridge analysis were 6.51, 95.83%, and 40.2 degrees C for the dilution ratio, solvent composition, and extraction temperature, respectively. Using the optimum conditions, 55.04% of crude lecithin in total phospholipid can be obtained from 100 g liquid egg yolk. The experimental values (56.21 % crude lecithin in total phospholipid) agreed with the predicted values.Y
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