共查询到20条相似文献,搜索用时 0 毫秒
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LORI J. PELLETT MARILYN I. SCHNEPF PATRICIA E. JOHNSON NANCY M. DIMARCO 《Journal of food quality》1990,13(6):419-433
The purpose of this research was to determine the relative iron bioavailability from soybean and cottonseed protein isolates by using an iron depletion/repletion method. Iron stores of rats were depleted so that any iron introduced in the diet would be utilized at a maximum and linear rate for hemoglobin regeneration. A comparison of iron utilization from cottonseed and soy to the reference standard could then be made. Between 40 and 47% of the iron consumed from the soy diet was converted to hemoglobin iron. The cottonseed diets had a significantly lower (29 to 34%) conversion efficiency (P < 0.05) in comparison to casein but were not significantly different from the soy diets. 相似文献
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反胶束技术萃取植物蛋白和油脂的研究进展 总被引:1,自引:0,他引:1
介绍了反胶束萃取技术萃取植物蛋白和油脂的原理和特点,并对该技术的国内外发展现状进行了全面、系统地论述,对今后反胶束技术的发展趋势进行了预测。 相似文献
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对地木耳蛋白质的提取工艺及稳定性进行了研究,结果证明地木耳蛋白质可以采用水为溶剂的方法提取,提取最佳条件为pH=9,浓度为3%(w/w),温度为40℃-50℃。提取时间控制在1.5h。2h即可达到较好的收率,蛋白质的收率可达75%。随着pH值的下降,地木耳蛋白质的溶解度也随之下降,pH〈6时蛋白质沉淀明显。地木耳蛋白质的热稳定性较好,加热温度、加热时间均对地木耳蛋白质的稳定性有一定的影响。地木耳蛋白质提取物具有较高的营养价值,可更方便地应用于食品加工业,应用前景广阔。 相似文献
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RAYMOND BORCHERS 《Journal of Food Biochemistry》1981,5(3):181-183
Extraction of raw soybean meal with 40% ethanol in water and a short autoclaving yields a residue which supports a growth rate 27% greater than that of conventionally autoclaved meal when fed to weanling male rats. This residue contains an average of 73% of the dry matter and 91% of the protein of the original raw meal. 相似文献
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The trypsin inhibition by an 85% aqueous ethanol extract of soybeans was shown to have many similarities to that exhibited by long chain fatty acids and their acyl CoA esters, in terms of concentration dependence, time dependence and susceptibility to Ca++ suppression. The heat-stable and hexane-extractable inhibitor in the extract was thus referred to as the Ca++ -sensitive fraction, in contrast to classic proteinaceous inhibitors. Tempeh fermentation increased the antitryptic activity of the 85% ethanol extract. Extraction of both classic and Ca++ -sensitive inhibitors from soybeans by aqueous ethanol was found to be concentration dependent. Aqueous solvents with less than 20% ethanol removed classic inhibitors as effectively as water, but extracted no Ca++ -sensitive one. Above 20% ethanol in the solvent, the classic inhibitors in the extract decreased until reaching a zero value at 70% ethanol concentration, while the Ca++-sensitive fraction increased to a maximum at 85%. 相似文献
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PRAVEEN C. BARGALE KRYSTYNA SOSULSKI FRANK W. SOSULSKI 《Journal of food process engineering》2000,23(4):321-327
Due to inefficient extractability of its low oil content, soybeans are often bypassed in village‐scale processing. Soygrits, flakes, and expanded collets were hydrolyzed by proteases, cellulases, and pectinases before oil extraction by solvent and static mechanical pressure. Driselase with multi‐enzyme activity and two proteases improved solvent extraction rates but only Driselase enhanced mechanical pressing. Up to 58% of seed oil was pressed from enzyme‐hydrolyzed flakes but 88% was pressed from Driselase‐treated collets. Either pretreatment is a feasible adjunct to mechanical pressing in small batch operations. 相似文献
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蚕豆蛋白质提取工艺的研究 总被引:2,自引:1,他引:2
探讨蚕豆蛋白质提取影响因素,以单因素和正交试验确定最佳工艺条件.结果表明,蚕豆蛋白质的等电点PI为4.5,提取蚕豆中蛋白质最佳工艺条件为:温度40℃,提取时间2 h,料液比1:5,碱液浓度5×10-5mol/L. 相似文献
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EXTRACTION YIELD OF SOLUBLE PROTEIN AND MICROSTRUCTURE OF SOYBEAN AFFECTED BY MICROWAVE HEATING 总被引:1,自引:0,他引:1
IL CHOI SEUNG JUN CHOI JAE KEUN CHUN TAE WHA MOON 《Journal of Food Processing and Preservation》2006,30(4):407-419
A laboratory‐scale microwave (MW)‐assisted extraction system was constructed and compared with a conventional shaking water bath regarding the extraction of soluble proteins in soybeans. Dynamic reaction was monitored by response surface methodology in the MW‐assisted extraction system. The yield of soluble protein increased until either temperature (T) or water/solid (W/S) ratio reached an optimum point (60.1C, 12.6 mL/g), and then decreased with further increase of T or W/S ratio. In addition, the yield of soluble protein increased with time within a range of 30 min, and no critical point was observed. The molecular mass of soluble protein was distributed from 19.3 to 81.3 kDa estimated by sodium dodecyl sulfate–polyacrylamide gel electrophoresis. Scanning electron microscopy showed the destruction of the microstructure of soybean cells, which increased the extraction of soluble soy protein. 相似文献
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大豆胚芽中异黄酮和皂甙同步提取工艺的研究 总被引:2,自引:0,他引:2
大豆异黄酮和大豆皂甙是大豆中的活性成分。本文主要研究了同时从大豆中提取这两种物质的工艺条件,通过溶剂对比实验、单因素实验确定了从大豆粕中提取大豆异黄酮和大豆皂甙的最佳工艺,并通过正交实验优化最佳生产工艺条件:温度55℃、固液比1:18、80%的乙醇溶液、提取时间2h、提取两次,异黄酮和皂甙得率分别为1.53%和4.07%。 相似文献
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