乙酸乙酯
- 名ethyl acetate
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超临界CO2和乙酸乙酯提取胆红素
Study on the Extraction of Bilirubin by Supercritical CO_2 Extraction and Ethyl Acetate
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试验采用大口径HP-快速GC残留溶剂柱为分离柱,对顶空平衡温度、平衡时间对残留有机溶剂乙酸乙酯测定的影响进行了分析研究。
A wide bore HP-fast GC residual solvent column was performed , and the effects of the equilibrium temperature and equilibrium time on the determination of ethyl acetate were studied .
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乙酸乙酯协同超临界CO2结晶分离穿心莲内酯的研究
Supercritical CO_2 Cooperated with Ethyl Acetate Crystallizing Andrographolide
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建立了GC测定单硝酸异山梨酯中氯仿、乙酸乙酯残留量的方法。
A method for the determination of chloroform and acetic ether by GC was established .
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从10%乙酸乙酯-石油醚部分分离得到甾醇混合物A,经GC-MS分析,分离、鉴定出7个甾醇化合物(1-7)。
Based on GC-MS analysis , seven sterol compounds ( 1 ~ 7 ) were identified .
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2-(2-氨基噻唑-4-基)-(z)-2-甲氧亚胺基乙酸乙酯合成方法的改进
The improvement for synthesization method of 2 - ( 2-amido thiazole 4-radicle ) - ( z ) - 2-methoxy imino acetic acetate
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ICP-MS法测定高纯石墨中的痕量杂质元素乙酸乙酯萃取&ICP-AES测定高纯金中的痕量杂质
Determination of Impurity Elements in High Purity Graphite by Inductively Coupled Plasma-Mass Spectrometry
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4种提取物对玉米象成虫熏蒸活性差异较大,活性大小为印楝油>超临界CO2提取物>乙酸乙酯粗提物>印楝素A。
The fumigant activity of the 4 different neem extracts was neem oil > neem SFE extracts > neem ethyl acetate extracts > azadirachtin A.
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方法:微孔滤膜过滤、乙酸乙酯福尔马林分离、Giemsa染色、油镜及相差显微镜观察。
Methods : Micromembrane filtration , ethyl acetate-formalin separation , giemsa stain .
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在氟化钾催化下,芳香醛与氰乙酸乙酯发生羰基与活性亚甲基的缩合反应,高收率地得到缩合产物,且只得到E式产物。
The carbonyl methylene condensation reaction of aromatic aldehydes with ethyl cyanoacetate has been carried out smoothly in the presence of potassium fluoride only giving E isomers in high yield .
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确定了以气相色谱测定燃料组分含量的方法,即用乙酸乙酯做溶剂,采用标准曲线方法来测定敏化燃料C的含量;
The way to measure fuel ingredient contents by Gas Chromatography technology was determined , i. e. the contents of the sensitive fuel C was tested by means of calibration curve with ethyl acetate as solvent ;
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对广东桑桑椹石油醚和乙酸乙酯提取物中的化学成分进行GC-MS分析。
Volatility chemical constituents of the extracts of mulberry ( Moms atropurpurea R. ) by petroleum ether and ethyl acetate were analyzed by GC-MS.
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通过GC、MS分离鉴定的玉金香挥发性芳香化合物有乙酸乙酯、乙酸丁酯、3-甲基戊酸乙酯、2-甲基2-丙醇、二乙醚、环己醇。
The main volatile compounds of " Yujinxiang " melon were ethyl acetate , butyl acetate , pentanoic acid , 3-methyl , ethyl ester , 2-methyl-2-propanol , diethylether , cyclohexanol .
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方法青蒿经石油醚提取浓缩,浸膏经过硅胶柱,用不同配比的乙酸乙酯洗脱,用TLC法跟踪,UV法检测。
Methods Artemisinin is extracted with petroleum ether and pass column of silica gel and gradient elution with ethyl acetate , then it is tracked with TLC and detected with UV-VIS .
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用正交试验法探索以乙酸乙酯提取生姜油树脂的最佳工艺条件,并对产品质量进行考核,用FTIR光谱仪鉴别成分。
The paper studies the best technological conditions of extracting ginger oleoresin with the acetate ester , inspects the quality of a product and appraises the composition with FTIR .
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再以D-脯氨酸为原料,先后与乙酰氯、三乙胺和(BOC)2O反应,最后与苯基溴化镁反应,经乙酸乙酯萃取制得目标产物R-二苯基脯氨醇。
Finally the title compound diphenyl [ ( R ) - pyrrolidin-2-yl ] methanol was obtained through reaction with phenyl magnesium bromide and extracting by ethyl acetate .
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[结论]虎杖的乙酸乙酯提取物有一定的抗炎作用,其作用机制可能是抑制炎症介质PGE2的合成、抑制细胞免疫及与垂体-肾上腺皮质系统有关。
Inhibiting synthesis of PGE2 and cellular immune function and relating with hypothalamus - pituitary - adrenocortical axis probably are the mechanisms .
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有机氯类用乙酸乙酯&环己烷和凝胶净化柱提取净化,石英毛细管气相色谱(配ECD检测器)检测。
Organic chlorine using ethyl acetate-cyclohexane and gel purification column extraction purification , quartz capillary gas chromatography ( ECD allocation ) detection .
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以龙眼核为研究材料,利用GC-MS分析了龙眼核乙酸乙酯萃取物的挥发性成分,共分离鉴定出了40个组分。
With longan seed as the study material , volatile constituents of longan seed soluble in ethyl acetate were analyzed with GC - MS , and 40 components were determined .
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讨论了表面活性剂(DBS)用量与萃取率的关系,得出了用乙酸乙酯萃取时Ce(NO3)3溶液与DBS用量的最佳比。
The relationship between DBS and the extraction rate was discussed , and the optimum mole of Ce ( NO_3 ) _3 to DBS rate was obtained .
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以水玻璃为原料、乙酸乙酯为潜伏酸试剂,采用溶胶凝胶法制备出了高温润滑脂稠化剂&高比表面积超细SiO2粉体。
A kind of lubricating grease thickener , ultrafine silica gel powder with high specific surface area , was prepared taking water glass and ethyl acetate as a latent acid reagent .
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实验结果表明:2乙基已硫基乙酸乙酯对钯具有较好的萃取性能,N,N二仲辛基2乙基已硫基乙酰胺与二(2乙基已基)硫醚一样是金的优良萃取剂。
The experimental results show that 2-ethyl hexyl thioacetate is a good extractant for palladium and that N , N-di ( sec-octyl ) 2-ethyl hexyl thioacetamide , as well as di ( 2-ethyl hexyl ) sulfide , is an excellent extractant for gold .
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生长曲线法观察发现蛇六谷石油醚萃取物、乙酸乙酯萃取物对人胃癌SGC-7901细胞增殖抑制作用有一定的时间-效应曲线;
Growth curve method showed the extract of petroleum ether and ethyl acetate of Rhizoma Amorphophalli had a time-effect effect on the proliferation of cell SGC-7901 .
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采用乙酸乙酯处理样品,甲醇作流动相,测定了口香糖中抗氧化剂BHT含量。
The BHT in chewing gum was treated with ethyl acetate , then analyzed by high performance liquid chromatography with methanol as mobile phase .
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结论:苏木乙酸乙酯提取物有明显的抗免疫排斥作用,能减轻移植心肌的病理损伤,其抑制IL-6的分泌可能是发挥免疫抑制作用的途径之一。
Conclusions : sappan acetic ether extract improves the pathologic changes in heart muscles and has an obvious effect on anti-immun rejection , which gives rein to immunodepression probably by reducing the secretion of IL-6 .
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结果表明:正丁醇组分清除DPPH自由基能力较强,乙酸乙酯部分抗猪油氧化能力较强;
The results showed that n-butanol extracts has strong scavenging activity to DPPH free radicals while ethyl acetate extracts was better to restrain the lard oxidation .
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RMV再沸器装置用于乙酸乙酯蒸发
Application of RMV reboiler for ethyl acetate evaporation
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目的:研究香加皮乙酸乙酯提取物(ethylacetateextractfromCortexPeriplocae,CPEAE)诱导人乳腺癌细胞系MCF-7凋亡作用及其作用机制。
Objective : To investigate the effect of ethyl acetate extract from Cortex Periplocae ( CPEAE ) on apoptosis of human breast cancer cell line MCF-7 and to discuss its mechanism .
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介绍了以多聚甲醛、间戊二烯为原料在乙酸乙酯中BF3-乙醚溶液催化作用下,进行Diels-Alder反应,合成了2-甲基-5,6-二氢-2H吡喃的方法。
Synthesis of 2-methyl-5,6-dihydro-2H-pyrane from paraformaldehyde and 2,4-pentadiene in ethyl acetate in the presence of BF_3-ethyl ether as catalyst by Diels-Alder reaction was presented .
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TLC法选用硅胶G板,展开剂:环已烷-乙酸乙酯(4∶1),测定波长:610nm,参比波长:420nm。
Silica gel plate was used in TLC with developer : cyclohexane ethyl acetate ( 4 ∶ 1 ), scan wavelength : 610 nm , reference wavelength : 420 nm .