The invention discloses a catalytic asymmetric hydrogenation reaction. Of the present invention is the role of chiral catalyst, H2 of the prochiral unsaturated compounds to addition reaction to obtain the chiral product, wherein the solvent used in the reaction liquid polyethylene glycol compound. T.....
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The utility model relates to a duplex drainage standpipe and a system. The system comprises the duplex drainage standpipe in the building and a manhole at a lower end. The duplex drainage standpipe comprises a first drainage standpipe and a second drainage standpipe, which are arranged side by side .....
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The invention provides an electrical stimulation method as well as relative device and system thereof. The system comprises an output module and a stimulation module, wherein the output module obtains low-frequency and long-term electrical stimulation parameters and transmits the electrical stimulat.....
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本发明涉及一种养心安神药物及其制备方法，该药物的活性成分是由酸枣仁、合欢花、桑椹、五味子以及柏子仁的有效提取物组成。本发明所述药物的制备方法是将用于提取的原料粉碎成粗粉，分次加水煎煮，合并煎煮液，冷却，滤过，通过处理好的吸附树脂柱，用纯水洗脱至流出液颜色很浅，继以醇溶液洗脱至流出液颜色很浅，收集醇洗脱液，减压回收溶剂并浓缩至稠膏状，得到本发明药物的活性成分。最后将制得的活性成分制成各种口服制剂。
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本发明涉及一种养颜中药制剂及其制备方法，该制剂对胃肠燥热、脾气虚所至便秘、月经不调等症具有保健和治疗功能。该制剂是由芦荟、薏苡仁、蒺藜、牡丹皮、白芷、益母草等原料药制成的。本发明所述的制备方法是将芦荟、薏苡仁、蒺藜、牡丹皮、白芷醇提２次，合并醇提液，冷藏，滤过，滤液备用。除珍珠粉外，益母草等其余４味分次加水煎煮，合并煎煮液，浓缩，醇沉，冷藏，滤过。滤液和上述芦荟等醇提液合并，回收乙醇，减压干燥，粉碎成细粉，和珍珠粉混合后，加入适量辅料，混匀，干压制粒，即制得本发明药物的活性组分。
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