查询词典 acetone

Character: White or almost white crystalline powder, smell-less;Assay:≥98.5%;Solubility:Soluble in water, Slightly soluble in acetone and ethanol;IR:Complies with the working standard;Chemical identification:Red;Na Salt indentification:Complies with the standard;Relative substance:Complies with the working standard;pH:8.0-9.5;Loss on drying:≤0.5%; Heavy metal:≤ 20ppm

特征及特性：应为白色或类白色结晶性粉末；无臭，无味；含奥扎格雷钠(C13H11N2NaO2)≥98.5%；在水中溶解，在乙醇和丙酮中微溶；IR图谱与对照品一致；化学鉴别应显红色；溶液主斑点与对照品溶液主斑点的位置相同；钠盐鉴别符合规定；有关物质鉴别符合规定；pH：8.0～9.5；；干燥失重≤0.5%；重金属≤20ppm

Character: Yellowish or yellow crystalline powder,smell-less; Assay: 98.0%—102.0%; Specific Optical Rotation:+63.0°to +69.0°; Ph:3.0 to 5.0;Clarity of Solution complies with the standard. Related Substance:(Single impurities≤0.5%; total impurities≤1.5%);Methanol:≤0.3%;Dichlormethane≤0.06%Acetone≤0.5%;walter:7.0%—9.5%; Residue on Ignintion:≤0.1%; Heavy Metals:≤0.0002% Identification:Most absorb at the wavelength 220nm,256nm,370nm; The infrared spectrogram according to the comparison; positive reflection

特征及特性：淡黄色或黄色结晶性粉末，无臭；含量98.0%—102.0%；鉴别：1）在220nm、256nm、370nm的波长处有最大吸收；2）供试品溶液在主峰的保留时间与对照品溶液主峰的保留时间一致；3）供试品红外光吸收图谱与对照品的图谱一致；4）呈正反映；比旋度：+63.0°至+69.0°；酸度：3.0—5.0；溶液颜色符合规定；有关物质：（单个杂质≤0.5%；总杂质≤1.5%）甲醇：≤0.3%；二氯甲烷：≤0.06%；丙酮：≤0.5%；水分：7.0%—9.5%；炽灼残渣：≤0.1%；重金属：≤0.0002

You would be amazed to see the hard steel melted by soft air--a mixture of oxygen and acetone.

第一次见她时只是觉得稀奇，纳闷怎么女人也可以干这种活，而且还干得那么好。

Properties: colorless needle-like crystals, melting point 105 ~ 106 ℃, optical rotation +51 °(c = 0.978, chloroform), other reports shows that by ethanol recrystallization the melting point 104 ~ 105 ℃, methanol re - the formation of solvate crystal melting point 84 ℃.it is Soluble in acetone, chloroform, insoluble in ether, petroleum ether, insoluble in water.

性质：无色针状结晶，熔点105～106℃，旋光度+51°（ c=0.978，氯仿），还有报道经乙醇重结晶熔点104～105℃，经甲醇重结晶形成的溶剂化物熔点84℃。易溶于丙酮、氯仿，难溶于乙醚、石油醚，不溶于水。

Liquid-phase epoxidation of allyl chloride with hydrogen peroxide was carried out over Ti-MWW, a novel titanosilicate with the MWW structure, to synthesize epichiorohydrin selectively and effectively. Ti-MWW proved to be superior to the conventional TS-1 catalyst in both catalytic activity and product selectivity. Ti-MWW prefers aprotic solvents of acetone and acetonitrile, both of which can restrain the solvolysis of epichiorohydrin, whereas TS-1 favors a protic solvent of methanol.

研究了具有MWW结构的新一代钛硅分子筛Ti-MWW催化剂对烯丙基氯液相环氧化高效合成环氧氯丙烷的催化性能结果表明，Ti-MWW的催化活性以及产物选择性均优于传统的钛硅分子筛TS-1，对于Ti-MWW，合适的溶剂为非质子性溶剂丙酮和乙腈，在该溶剂中环氧化物不易发生溶剂化开环反应；而对于TS-1，合适的溶剂是质子性溶剂甲醇，但甲醇可导致醇醚副产物的生成。

Low concentration acetone sensors play an important role in monitoring of industrial production, food quality, stock raising and disease diagnosing.

低浓度丙酮气体的检测在监测工业生产、食品质量、畜牧业和疾病等中有重要的作用。

Heilongjiang Forest Botanical Garden, Harbin 150040, Heilongjiang, China Abstract: Using growth rate and hanging drop methods, biological activity of four acetone extracts from Sophora flavescens Ait., Galinsoga parviflora Cav., Typhonium giganteum Engl., and Datura stramonium L.

黑龙江省森林植物园，黑龙江哈尔滨 150040 摘要：采用生长速率法和悬滴法测定了苦参、牛膝菊、独角莲、蔓陀萝4种植物的丙酮提取物对水稻恶苗病菌、稻瘟病菌、玉米小斑病菌、玉米弯孢菌叶斑病菌、番茄叶霉病菌和辣椒根腐病菌的生物活性。

The leaves of Balsam pear were disposed with different organic solutions, which were ether, acetone and ethanol,after that, analyse of proteins by supersensitive silver stain SDS-PAGE method.

作者中文名：陈宏；王振英；彭永康摘要：不同有机溶剂处理苦瓜叶片，用超敏感银染SDS-PAGE电泳进行蛋白质分析。

The process flow was designed and experimentally studied for separation of acetone, tetrahydrofuran, triethylamine and water mixture.

对丙酮、四氢呋喃、三乙胺、水混合物的分离进行了工艺流程设计和实验研究。

We used ITO glass substrate and high purity（99.99%） titanium , put to use sputtering process, add to high purity O2 make it complete the best structure film and the thickness about 1400 . By way of 500℃ anneal could got a better anatase phase, this result could easy reaction with electrolyte to increase electron-transferred. Used as spin casting covering PR on ITO substrate, transferring patterns of array circular shapes on a mask to photography, used optimize temperature and time to hard bake. Finally used HCl to etching underexposed TiO2 area, and acetone to tripper top PR, make it to accomplish pillars shape TiO2 electrode.

本研究使用ITO玻璃基板为底材在以高纯度钛(99.99%)为靶材，利用溅镀方式通入纯氧使其行成高纯度TiO2镀於ITO基板上行成厚度约1400的薄膜，且经500℃高温烧结使其行成最强的锐钛矿结晶相，此晶相有利於与电解液反应进而增加电子的转移，提升太阳能电池最佳的效率，在以旋转涂布方式铺上光阻，以矩阵排列的圆孔光罩曝光、最佳的温度及时间来烘烤、显影后；使用盐酸以等向性湿蚀刻方式蚀刻未曝光之TiO2区域，最后利用鈵铜将最上层光阻去除，使其行成柱状TiO2的电极。

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。