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大豆异黄酮的生理功能研究概述 总被引:26,自引:0,他引:26
概述了大豆异黄酮的生理功能最新研究进展,经病因学调查,动物实验以及人体实验研究表明,大豆异黄酮具有很强的抗癌活性,预防骨质疏松症效果以及预防心血管疾患者效果等生理功能。 相似文献
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大豆异黄酮测定方法的研究概况 总被引:5,自引:0,他引:5
综述了大豆异黄酮的几种测定方法,如紫外分光光度法,色谱法和免疫检测法。并分析了这些检测方法的优缺点。在实际应用时,应根据实际情况选择不同的检测方法。 相似文献
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首先采用大豆为原料制备发芽大豆,以异黄酮得率为指标,确定最佳发芽时间为96h。继而对发芽大豆中异黄酮的提取工艺条件进行研究,在单因素实验结果的基础上,进行正交实验确定最佳提取工艺条件,其结果为超声功率400W、超声波时间40min、乙醇浓度80%、回流时间1.5h,在此条件下异黄酮得率为3.774mg/g。 相似文献
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大豆异黄酮精制工艺研究 总被引:2,自引:1,他引:1
试验比较10种不同型号大孔树脂对大豆异黄酮吸附性质和不同溶剂萃取大豆异黄酮效果,确定HPD-600树脂吸附纯化大豆异黄酮最佳工艺条件如下:上样液浓度0.15mg/mL、上样液pH值4~5、上样量4.5BV、吸附流速1.0ml/min、静态吸附250min,用80%乙醇作为解吸剂,解吸流速为0.5ml/min,3.0BV解吸剂即可解吸完全。得到大豆异黄酮粗品含量为20.11%,比粗提物纯度提高7.18倍;同时得出丙酮沸点回流萃取可得到含量为42.91%大豆异黄酮产品,纯度比含量为20.11%原料提高2.13倍;乙酸乙酯和丙酮组合沸点回流萃取,可得到含量为70.36%大豆异黄酮产品,纯度比含量为42.91%原料提高1.64倍。 相似文献
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将大豆异黄酮(大豆染料木素与染料木苷占40%)添加到巧克力配料中,通过单因素实验及正交实验,优化大豆异黄酮巧克力制备工艺。确定更年期女性每人摄入大豆染料木素与染料木苷总量30 mg/d,为具有类雌激素效应的有效摄入量。通过优化,得到最佳工艺为:精磨温度为45℃、精磨时间8 h、精炼温度80℃、精炼时间72 h、调温时间30 min,大豆异黄酮添加量为1.25%、可可液块添加量为9%、可可脂添加量为18%、蔗糖添加量为35%、奶粉添加量为8%、食用植物油添加量为28%、卵磷脂添加量为0.5%、香料添加量为0.25%。最佳工艺条件下制备的大豆异黄酮巧克力对更年期综合症具有一定改善功效。 相似文献
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This study was conducted to determine the fluctuating levels of isoflavone in soybean (Glycine max L.) seeds of six varieties at different development stages. The average concentration of total isoflavone in the fully matured seed was 669 µg g?1, whereas those in the seeds of the R5 (beginning), R6 (green full‐sized) and R7 (onset of physiological maturity) stages were 145, 296 and 611 µg g?1, respectively. Sowonkong variety was highest in total isoflavone content of the fully matured and the R7 seed among all the varieties. In all six varieties, total isoflavone levels at the R7 stage were higher than those of R5 and R6 stages. Total isoflavone concentrations rapidly increased as growth stages transitioned from R5 to R7, as indicated by a positive correlation (r = 0.80***) between the total isoflavone and growth stages. Overall, total isoflavone levels were similar between R7 and the full maturity stages. Of the various isoflavone derivatives, acetylglucoside and aglycon were not significantly correlated with total isoflavone concentrations. However, glucoside (r = 0.97***), malonylglucoside (r = 0.99***), TGIN (genistein + genistin + malonylgenistin + acetylgenistin, r = 0.93***) and TDIN (daidzein + daidzin + malonyldaidzin + acetyldaidzin, r = 0.99***) were very highly correlated with total isoflavone concentrations. As a result, they constituted most of the total isoflavones in the soybean seeds at R5, R6, R7, and full maturity stages. Copyright © 2007 Society of Chemical Industry 相似文献
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以低纯度商品大豆异黄酮为原料,利用酸水解法、超声波辅助酸水解法及酶水解法制备高纯度大豆异黄酮甙元产品。通过实验,比较这三种水解制备方法水解率、产品回收率和产品纯度,并对制备得到产品进行成分分析,选择出较佳制备高纯度大豆异黄酮甙元方法。实验结果表明,采用β―葡萄糖苷酶水解分离纯化工艺制备大豆异黄酮甙元产品,操作简单,安全环保,其产品得率、异黄酮回收率和产品纯度分别为15.1%、77.1%和92.7%,分离纯化效果较理想。 相似文献