查询词典 acetone

Was also observed and evaluated ,The poison symptoms of tropically treated M.separata were observed, following a similar pattern of nerve poisoning: excitation, convulsion, paralysis, and death. The effect of acetone extract from Ferula.ferulaeoidis on the development and hatch of the eggs and survival of hatched larvae as well as ovicidal activity was observed and estimated.

蛹的生长发育有抑制作用，中毒粘虫先后表现出兴奋、痉挛、麻痹等症状，最后死亡；对黄粉虫蛹生长发育的抑制作用类似于保幼激素(Juvenile hormone analogs， JHA)活性；对棉铃虫(Heliothis armigera Hübner)卵发育、孵化及初孵幼虫存活有明显影响，表现出一定的杀卵活性。

The present invention discloses a silver iodide acetone solution above-ground combustion equipment, including liquid storage tank, air compressor, liquid-supplying and gas-supplying pipelines, filter, atomizer, pulse high-voltage igniter, combustion chamber and wind-proofing device, the above-mentioned components are placed on a base seat. The liquid storage tank is communicated with liquid inelt of atomizer by means of filter, the air outlet of air compressor is communicated with air inlet of the atomizer, the combustion chamber is a circular truncated cone shaped cylinder body whose upper portion is larger and lower portion is smaller, and is placed on a vertical rod.

本发明公开了一种碘化银丙酮溶液地面燃烧装置，包括储液罐、空气压缩机、供液供气管路、过滤器、雾化器、脉冲高压点火器、燃烧室和防风装置，上述装置均设置在一底座上；其中储液罐通过过滤器连通到雾化器进液口，空气压缩机出气口连通到雾化器进气口；燃烧室为一下大上小的圆台形筒体，设置在一竖杆上，雾化器的出口设置在燃烧室内；燃烧室上外围设置防风装置，该防风装置是一圆形防风圈；所述脉冲高压点火器的一电极设置在燃烧室壁面，另一电极设置在燃烧室内。

Interaction between vicinal supramolecules, distance of chiral centers between host and guest molecules and acetone molecule inclused are not important for the chiral recognition between host and guest molecules.

主客体之间手性中心距离的远近以及溶剂丙酮分子等因素，不是影响主客体之间的手性识别的关键因素。

Methods The pesticides were extracted with acetone and dichloromethane, warmed with water at 40℃,and circumrotated and evaporated until it was nearly dry, then it was purified by Envi Carb column and Sep Pak NH2 column. Afterwards, gas chromatography mass spectrometry and selected ion monitoring were used to determine 42 pesticide residues, such as organo-phosphorus, pyrethroid, organochlorine, carbamate and weedicide.

该法采用丙酮、二氯甲烷提取，40℃水浴旋转蒸发近干，以Envi-Carb柱和Sep-Pak-NH2柱净化，以气相色谱－质谱选择离子监测方式分析检测有机磷、有机氯、拟除虫菊酯、氨基甲酸酯和除草剂等42种农药残留。

With egg yelk as raw material, extracted by aquiferous ethanol and aether, removing water and oil by acetone, we gain phospholipids mixture, and search the extracting conditions. The optimum condition is determined:extracting temperature (20 ), time (60mins), solvent (92%ethanol),solvent quantity (12 times of the yelk), at which yield is highest; using thinlayer chromatography to measure its component, the content of phosphatidylcholine extend to 68.2%.

本文以鸡蛋的卵黄为原料，采用含水乙醇与乙醚提取，通过丙酮脱水去油，得到粗品卵磷脂；并对提取条件进行了优化研究，结果表明：提取时间60分钟，用92％乙醇，加入含水乙醇是蛋黄重的12倍，在20℃时，卵磷脂收率最高；采用薄层扫描法定量检测，所得粗品卵磷脂的纯度高达68.2％。

Primary extract the active elements from the root,stem and foliage of Artemisia annua L with petroleum ether (30~60℃), petroleum ether (60~90℃), ethanol, acetone and water were carried out in laboratory, then further separation of active elements was detected by column chromatography, and then the separated elements′acaricidal activitie was measured against Tetranychus cinnabarinus.

采用石油醚（30~60℃）、石油醚（60~90℃）、乙醇、丙酮和水等5种溶剂对采自6月份的黄花蒿的根、茎、叶分别进行活性成分的初步提取，然后用柱层析进行分离检查，并进一步用分离得到的组份对朱砂叶螨进行生物测定。

A novel route for synthesis of methyl acetoacetate from acetone and dimethyl carbonate over solid base catalysts was proposed.

以碳酸二甲酯与丙酮为原料，在固体碱上合成乙酰乙酸甲酯，并考察了反应温度、反应时间、催化剂用量和原料摩尔比等因素对反应结果的影响。

Any of three compounds (acetoacetic acid, acetone, and/or beta-hydroxybutyric acid) found in excess in blood and urine of persons with metabolic disorders.

三种化合物中任意一种（乙酰乙酸、丙酮和/或β羟基丁酸），人体的血液和尿中大量含有。

Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。

Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.Methods Sample solution was injected on a GDX column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.The residue was calculated by the external standard method.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量方法：采用固定相二乙烯苯乙基乙烯苯型高分子孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。