方法利用高速逆流色谱技术,通过寻找合适的两相溶剂体系及工艺参数,研究及讨论石杉碱甲分离制备的新方法。
METHODS Using the technology of HSCCC, research and discuss a new preparative method of Huperzine A by searching a suitable two-phase solvent system and relative technical parameters.
结果超滤法能有效地将石杉碱甲固体脂质纳米粒与游离石杉碱甲分离,回收率为98.09%,测得3批样品的平均包封率为57.63%。
Results Free drugs could be effectively separated from the Hup ASLN by ultrafiltration. The average entrapment efficiency of three batches of Hup ASLN was 57.63%, with the recovery of 98.09%.
本文对土壤甲螨的采集与分离方法进行了探讨。
This paper studied the method of collecting and separating oribatid mite in soil.
介绍了用溶剂析出法分离间苯二甲酸二甲酯磺酸钠生产废水中硫酸钠和间苯二甲酸二甲酯磺酸钠的新工艺。
A new process using solvent for separating sodium sulfate and dimethyl isophthalate sodium sulfonate from wastewater of dimethyl isophthalate sodium sulfonate production is introduced.
这些结论表明,采用加盐萃取对醋酸甲酯和甲醇进行分离十分有利。
These conclusions indicated that saline extraction was very helpful for separation of methanol and methyl acetate.
柱色谱进一步分离可制备高纯度冬凌草甲素。
Oridonin was purified by the further separation of column chromatography.
大孔树脂能用于陈皮中多甲氧基黄酮类化合物的分离纯化。
The results proved that macroporous resin can be used for separation and purification of polymethoxylated flavones from orange peel.
甲真菌病手指甲或脚趾甲从指甲床分离或松脱。
The separation or loosening of a fingernail or toenail from its nail bed.
适用于轻工、化工、化肥、食品、制药等行业,特别适用于甲糖分离。
They are suitable for light industry, chemical industry industry, fertilizer, food and pharmacy industries, especially the separation of methyose.
将元宝枫油制成混合脂肪酸甲酯,再应用尿素包合法对其中的神经酸甲酯分离的主要影响因素进行了正交试验研究。
The fatty acid methyl esters was prepared from Acer Truncatum buge oil, and the main influence factors of separating nervonic acid methyl ester by urea-inclusion method were analysed.
本发明公开了一种自荷叶中分离制备2-羟基-1-甲氧基阿朴啡的方法。
The invention discloses a method for separating and preparing 2-hydroxyl-1-methoxy aporphine from lotus leaves.
结论:本方法准确、快速、简便,可不经分离直接测定复方盐酸二甲双胍片中盐酸二甲双胍的含量。
CONCLUSION: the method is accurate, fast, convenient, and which can be used to determine the contents of metformin hydrochloride in compound metformin hydrochloride tablets directly without isolation.
以甲酯化的大豆油脱臭馏出物为原料,从中分离提纯天然生育酚。
The purification of natural tocopherols from methyl esterified soybean oil deodorizer distillate was discussed.
在乙醚溶液制得的聚苯乙烯次甲基锂与甲基丙烯酸甲酯反应不能分离出聚甲基丙烯酸甲酯及它的接枝共聚物。
Neither polymethylmethacrylate nor polymethylmethacrylate-grafted copolymer could be isolated by the reaction of polystyrene methylene lithium prepared in ether solution with methyl methacrylate.
以混合脂肪酸甲酯为原料,采用尿素包合法(脲包法)分离不饱和脂肪酸甲酯。
The unsaturated fatty acid methyl esters (FAMEs) were separated from the fatty acid methyl esters mixture using urea adduct method.
结论我院患者血液分离的耐甲氧西林金黄色葡萄球菌菌株在分子水平上有较近的亲缘关系。
Conclusion MRSA strains isolated from patients in our hospital have a rather close consanguinity at molecular level.
柠檬苦素采用氯仿萃取取样,并经硅胶G薄层分离后以对——二甲氨基苯甲醛作显色剂比色测定。
The limonin sample is got by extraction with chloroform and is separated by a thin-layer chromatography of silica-gel G, and then is determined by colorimetric metho…
综述了碳酸二甲酯-甲醇二元共沸物汽液平衡和分离方法的最新研究进展。
Vapor-liquid equilibria and separation of methanol-dimethyl carbonate azeotrope are(reviewed) in this paper.
使用中空纤维处理羟丙甲纤维素滴眼液,离心分离羟丙甲纤维素与苯扎溴铵,建立了HPLC法测定其中的苯扎溴铵含量。
Benzalkonium bromide was separated from the hypromellose eye drops with hollow fiber under the effect of centrifugal force and its determination was studied by an HPLC method.
通过苯酚和碳酸二甲酯的酯交换反应合成了碳酸甲苯酯,采用减压精馏对其进行了分离提纯,得到纯度>99.5%的碳酸甲苯酯;
Methyl phenyl carbonate(MPC) was prepared by transesterification of dimethyl carbonate(DMC) with phenol and the product with a purity exceeding 99.5% was obtained by vacuum distillation.
结果分离鉴定了2个二苯酮化合物,其结构分别为2 甲氧基- 3, 4 -亚甲二氧基-二苯酮(I), 4 羟基-2, 6 -二甲氧基-二苯酮(II)。
Results A new benzophenone was isolated and identified as 2-methoxy-3,4-methylenedioxy-benzophenone (I), along with a known compound 4-hydroxy-2,6-dimethoxy-benzophenone (II).
对乙酸甲酯水解体系的催化剂和热力学、动力学研究现状进行了评述,分析了传统的水解分离工艺,并提出了可行的新工艺。
The studies on the catalysts, the thermodynamics and kinetics of methyl acetate hydrolysis were reviewed. The ordinary hydrolysis separation technology was analyzed and a new process was proposed.
本文提出了用高效液相色谱分离和测定小麦粉中增白剂过氧化苯甲酰的新方法。
A new method using high validity liquid chromatogram to separate and determine the concentration of benzoyl peroxidation in wheat flour was proposed.
方法用索氏提取法对脂肪油进行提取,采用不同甲酯化处理后,采用气相色谱-质谱联用技术分离和鉴定其组分和含量。
MethodsThe fatty acids were extracted by Soxlet extraction, etherified by different methods and its components were analyzed by GC/MS.
目的建立冬凌草甲素的提取和分离新工艺。
OBJECTIVE To establish a new method for the extraction and separation of oridonin.
结论黄芩甙对我国分离的甲型流感病毒神经氨酸酶具有抑制活性的作用。
Conclusion Baicalin had inhibition effect on the strain of influenza virus isolated in China.
该实用新型可以将废气中的有机物尤其是二甲酯、二丁酯等分离回收,降低了成本、减少了污染。
The organic waste gas separator can separate and reclaim organic matters such as dimethyl, dibutyl ester and the like in waste gas, lowers production cost, and reduces pollution.
对甲醇气相氧化羰基化法合成碳酸二甲酯(DMC)产物的分离进行了研究。
Separation methods for products from synthesis of dimethyl-carbonate (DMC) by methanol gaseous oxidative carbonylation were investigated.
Kauppinen发现二甲胺四环素是一种从四环素分离得到的抗生素,它能阻止培养细胞的炎症反应和凋亡。
Kauppinen found that minocycline, an antibiotic derived from tetracycline, prevents inflammation and apoptosis in cultured brain cells.
Kauppinen发现二甲胺四环素是一种从四环素分离得到的抗生素,它能阻止培养细胞的炎症反应和凋亡。
Kauppinen found that minocycline, an antibiotic derived from tetracycline, prevents inflammation and apoptosis in cultured brain cells.
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