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目的:利用响应面法对黄姜总黄酮的提取工艺进行优化.方法:在单因素的基础上以超声功率、超声时间、料液比、乙醇浓度为响应因素,黄姜总黄酮的提取率为响应值,根据中心组合实验原理,采用四因素三水平的响应面分析法.结果:确定提取最佳工艺参数为超声时间29.53 min、超声功率为400.76w、料液比为1:42.19、乙醇浓度为79.60%,在此条件下总黄酮提取率的预测值为11.15 (mg/g).结论:考虑到实际操作的问题,将提取最佳工艺参数修正为超声时间30 min、超声功率400w、料液比1:40、乙醇浓度80%,进行3次平行试验,结果总黄酮提取率为11.09 mg/g,绝对误差为0.057%,说明实验结果与模型吻合很好. 相似文献
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以经色扶桑花为原料,研究了扶桑花红色素的提取及其稳定性的研究,结果显示:该色素用70%乙醇溶液浸提效果好。该色素在酸性条件下稳定,耐热性较好,耐还原性好,具有一定的开发利用价值。 相似文献
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本文以新鲜的金桂花(Osmanthus fragrans Lour)为实验材料,采用微波-蒸馏萃取法提取桂花中的精油。通过改变微波-蒸馏萃取法中的各种工艺参数(匀浆时间、料液比、微波时间),得到相应工艺参数下的桂花精油提取率。采用单因素试验和正交试验,分析提取工艺过程中的参数和提取率得到最优化的桂花精油提取工艺条件,即匀浆时间4min、料液比1∶5、微波时间60s,同时桂花精油提取率为0.85%。根据对桂花精油的理化性质分析可知,实验所得桂花精油样品香气较为纯正,液体呈橘黄色,酸值大约为7.50,酯值大约为18.03,达到精油的国标标准且质量较好。对桂花精油采用磷钼络合物法进行抗氧化性的研究,表明桂花精油的抗氧化活性较强,同时桂花精油的浓度与抗氧化性成正比关系。 相似文献
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Kazim Sahin Cemal Orhan Mehmet Tuzcu Irfana Muqbil Nurhan Sahin Hasan Gencoglu Osman Guler Subhash B. Padhye Fazlul H. Sarkar Ramzi M. Mohammad 《Biological trace element research》2014,157(2):156-163
Curcumin, a polyphenol, has pharmacological effects including antioxidant, anti-inflammatory and anti-cancer features. In this study, we have performed comparative in vivo evaluations of CDF (curcumin difluorinated) and curcumin in cisplatin-induced nephrotoxicity in rats. Male Wistar rats were divided into four groups: (1) Control; (2) Cisplatin (7 mg/kg body wt, intraperitoneal as a single dose); (3) Cisplatin and CDF (50 mg/rat/day; for 12 days); (4) Cisplatin and curcumin (50 mg/rat/day), for 12 days). Cisplatin treated rats exhibited kidney injury manifested by increased serum N-urea and creatinine (P?<?0.001). Kidney from cisplatin treated rats also exhibited significant increase in malondialdehyde (MDA) and 8-isoprostane levels (P?<?0.001). Treatment with CDF and curcumin prevented the rise in serum N-urea, creatinine, MDA and 8-isoprostane as compared to experimental control group in kidney (P?<?0.05). Compared to curcumin, CDF had greater potential in suppressing cisplatin-induced pro-inflammatory factors NF-κB and COX-2 as well as downstream markers Nrf2 and HO-1 (P?<?0.05) in kidney. The analysis on anion transport markers (OAT1 and OAT3) showed a similar trend (CDF?>?curcumin). CDF could reduce the expression of multi-drug resistance markers OCT1, OCT2, MRP2 and MRP4 to a much greater extent than curcumin (P?<?0.05). We also demonstrate that CDF influenced the expression of p-mTOR, p-p70S6K1, p-4E-BP1 and p-Akt. These data suggest that CDF can potentially be used to reduce the chemotherapy induced nephrotoxicity thereby enhancing the therapeutic window of cisplatin. The results also proved that compared to curcumin, CDF has superior protective effect in nephrotoxicity. 相似文献
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枣皮红色素的提取及其稳定性研究 总被引:5,自引:0,他引:5
对枣皮红色素的提取工艺及其稳定性进行了系统研究。结果表明枣皮红色素水溶性较好,色素溶液对光、热比较稳定;在酸、碱、金属离子、氧化剂、蔗糖等添加剂中具有较好的稳定性;但在含氧酸根阴离子、还原剂、Vc、苯甲酸钠、山梨酸钾等添加剂中稳定性较差。 相似文献
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采用回流提取法提取魔芋神经酰胺进行初步的探索,重点分析了溶剂浓度、温度、时间、料液比对魔芋神经酰胺提取量的影响,确定了最佳的提取工艺;并且结合高效液相/蒸发光散射检测器的方法对魔芋结合态神经酰胺-鞘磷脂进行了定性定量分析。 相似文献
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