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微波萃取法提取水豆腐中大豆异黄酮工艺研究 总被引:1,自引:0,他引:1
文章以乙醇为溶剂,采用微波萃取法,对水豆腐中大豆异黄酮的提取工艺进行探究.通过单因素实验考察了乙醇浓度、提取温度、微波萃取时间、固液比对微波提取率的影响.结果表明:从水豆腐中提取大豆异黄酮的最佳提取工艺为:乙醇浓度70%,提取温度50℃,微波萃取时间30 min,固液比1∶12. 相似文献
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文章以乙醇为溶剂,采用微波萃取法,对水豆腐中大豆异黄酮的提取工艺进行探究。通过单因素实验考察了乙醇浓度、提取温度、微波萃取时间、固液比对微波提取率的影响。结果表明:从水豆腐中提取大豆异黄酮的最佳提取工艺为:乙醇浓度70%,提取温度50℃,微波萃取时间30 min,固液比1∶12。 相似文献
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针对当前异黄酮在多方面的功能,结合当前的试验提取技术,提出一种基于溶液萃取与超声辅助的异黄酮提取方法。试验以黑豆中的异黄酮提取作为研究对象,通过溶液萃取的方式将黑豆中的异黄酮提取,并辅助超声提取方法,提高异黄酮的得率。在采用上述试验方法的同时,探讨了不同提取温度、料液比、乙醇浓度和提取时间对异黄酮得率的影响,最终得到最佳试验配比。 相似文献
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大豆异黄酮是一种从大豆种子中分离出的具有异黄酮类化合物结构的主要活性成分.广泛应用于食品及医药行业.利用超声波法提取大豆种子中大豆异黄酮,摸索了各种工艺参数对大豆异黄酮提取效果的影响.结果表明,乙醇浓度为75%,料液比为1∶20,提取时间为40 min,为大豆异黄酮的最佳提取工艺. 相似文献
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大豆异黄酮(SIF)是大豆中的一类活性物质,具有较显著的生理功能,因此引起了广泛关注.基于色谱法、萃取法、大孔树脂吸附法、膜分离法及几种技术联用的纯化精制方法,对近年来SIF的分离纯化方法进行了归纳,为进一步合理高效的分离纯化SIF提供参考. 相似文献
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对原有大豆异黄酮产品内在成分的分析,通过实验找到了提高产品甙元组分、提高产品溶解性能的生产方法,从而使大豆异黄酮生产工艺得到改进。 相似文献
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有关葛根的黄酮类成分分析与研究 总被引:1,自引:0,他引:1
采用聚乙酰胺过柱、多层串联质谱法分析鉴定葛根Puerariaomeiensis的黄酮类化学成分及其化学结构。从葛根无水乙醇鉴定了化合物:大豆素-7、4’-二葡萄糖甙(daidzein7,4’-diglucoside,分子量578);7-木糖-葛根素(7-xylose puerarin分子量548);大豆苷或葛根素(puerarin分子量416)。化合物与文献中报道的葛根黄酮类成分大豆素-7、4,-二葡萄糖甙(分子量578),7-木糖-葛根素(分子量548)和大豆苷(分子量416)的结构相符。 相似文献
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采用改良的Hummers法制备了负载有-SO3H、-COOH和-OH的氧化石墨烯,对其进行了结构表征。并首次以氧化石墨烯为催化剂,对天然产物大豆异黄酮糖苷水解反应进行了研究。实验结果显示氧化石墨烯在异黄酮糖苷水解反应中具有较好的催化活性,其最佳反应温度为105℃,此时3种大豆异黄酮糖苷的转化率分别达到94.3%,92.1%和88.8%,苷元的收率分别达到69.6%、60.6%和58.8%。其催化活性明显优于其他固体酸催化剂,如沸石HZSM-5和大孔树脂NKA-9,而与0.02 mol.L.1的硫酸相当。 相似文献
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Han-Sun Chiang Wen-Bin Wu Jia-You Fang Bing-Huei Chen Tsai-Hua Kao Ying-Ting Chen Chieh-Chen Huang Chi-Feng Hung 《International journal of molecular sciences》2007,8(7):651-661
It has been shown by chromatography that aglycone, glucoside, acetylglucoside and malonylglucoside isoflavone extracts prepared from soybean cake showed better antioxidant activities than isoflavone standards. Consequently, the aim of this study was to evaluate the protective effects of these isoflavone extracts against ultraviolet B (UVB)-induced keratinocyte damage. Our results demonstrated that these soybean cake isoflavone extracts could inhibit UVB-induced keratinocyte death. Moreover, they could inhibit UVB-induced intracellular release of hydrogen peroxide (H2O2) Furthermore, these isoflavone extracts differentially inhibited UVB-induced MAPK phosphorylation. The ERK1/2 and p38 phosphorylation was not inhibited by all tested isoflavone extracts, whereas JNK phosphorylation was inhibited by group I to group III isoflavone extracts. Since these isoflavone extracts are relative stable and easily obtained than the isoflavone standards, we suggest that soybean cake may be a useful potential source for developing effective skin care agents in against photoaging. 相似文献
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对大豆异黄酮的结构性能进行了论述,并采用高效液相色谱法(HPLC)对大豆蛋白复合纤维中异黄酮含量进行了检测分析。结果表明:异黄酮主要以糖苷型结构存在于大豆蛋白复合纤维分子中;经洗涤后,异黄酮含量仍然很高。 相似文献
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Ming-Sin Ng Yee-Shan Ku Wai-Shing Yung Sau-Shan Cheng Chun-Kuen Man Liu Yang Shikui Song Gyuhwa Chung Hon-Ming Lam 《International journal of molecular sciences》2021,22(21)
Soybeans are nutritionally important as human food and animal feed. Apart from the macronutrients such as proteins and oils, soybeans are also high in health-beneficial secondary metabolites and are uniquely enriched in isoflavones among food crops. Isoflavone biosynthesis has been relatively well characterized, but the mechanism of their transportation in soybean cells is largely unknown. Using the yeast model, we showed that GmMATE1 and GmMATE2 promoted the accumulation of isoflavones, mainly in the aglycone forms. Using the tobacco BrightYellow-2 (BY-2) cell model, GmMATE1 and GmMATE2 were found to be localized in the vacuolar membrane. Such subcellular localization supports the notion that GmMATE1 and GmMATE2 function by compartmentalizing isoflavones in the vacuole. Expression analyses showed that GmMATE1 was mainly expressed in the developing soybean pod. Soybean mutants defective in GmMATE1 had significantly reduced total seed isoflavone contents, whereas the overexpression of GmMATE1 in transgenic soybean promoted the accumulation of seed isoflavones. Our results showed that GmMATE1, and possibly also GmMATE2, are bona fide isoflavone transporters that promote the accumulation of isoflavones in soybean seeds. 相似文献
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硅胶柱层析法提纯大豆磷脂酰胆碱的研究 总被引:2,自引:0,他引:2
探讨了以大豆浓缩磷脂为原料,应用柱层析法提纯大豆磷脂酰胆碱(PC)的工艺过程.用TLC法考察了水、异丙醇与正己烷的体积配比,确定流动相适宜配比为正己烷:异丙醇:水(1:1:0.175,v/v/v).通过对固定相、流动相和上载量的考察,得到了柱层析最佳工艺条件:在空塔流速为0.382 cm·min-1,进样浓度为0.25 g浓缩磷脂·(mL流动相)-1的室温条件下,固定相选用100~200目粗孔2号硅胶,流动相为正己烷:异丙醇:水(1:1:0.16,v/v/v),最适上载量为0.086gPC·(g硅胶)-1.经高效液相色谱法定量分析,产品中磷脂酰胆碱纯度高达85%. 相似文献
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本文阐述无味环氧豆油的合成技术,将精制大豆油,乙酸与其它辅料按配方比例投入反应釜,再慢慢滴加双氧水,使之环氧化反应,待反应完全后,经水洗,中和,脱水等一系列工艺,制成无味环氧豆油成品。这种合成方法,工艺简单,产品质量稳定优良。 相似文献