丙酮

By measuring solvent evaporation rate, ratio of drug PLA precipitates,drug distribution in system and entrapping ratio at different time of preparation, we found the difference of precipitation velocity of drug was the main reason.

沉淀法制备载药聚乳酸纳米粒，即使同是脂溶性药物，但因药物与丙酮之间相互作用及药物与PLA之间亲和力的不同，包载效果仍可能出现较大差异，选用时应慎重。

Characteristic: Wax-like dark brown solid, intenerated under heat, at 30℃ turns into paste and becomes into viscous liquid at 40℃, soluble in vegetable oils and organic solvents like ethanol, hexane and acetone.

性质： 外观为深棕色蜡状固体，遇热软化，30℃为膏状，40℃以上为粘稠液体，溶于植物油和乙醇、己烷、丙酮等有机溶剂，不溶于水。

The sample was then rinsed with 10% HF + 40 % HNO3 + 50% H2O, ultrasonic-cleared in acetone, dried, oxygenized in H2O2, rinsed, dried, sterilized, and lixiviated. L-929 cells were cultured in vitro and assigned into negative control, surface oxidation (surface oxidation + NiTi-SMA leaching liquor), and non-treatment groups (NiTi-SMA leaching liquor alone).

用10%HF+40%HNO3+50%H2O进行酸洗，丙酮中超声波清洗，干燥，在H2O2溶液中氧化，再经清洗、干燥、灭菌、浸提等处理。L-929细胞体外培养，实验分为阴性对照组：培养液培养；表面氧化组：面氧化处理NiTi-SMA浸提液培养；未处理组：未经处理NiTi-SMA浸提液培养。

For Method Ⅰ, the residues were extracted from homogenized tissue with acetone-ethylacetate-n-hexane (1∶1∶1, v/v/v), and then were redissolved in acetonitrile; for Method Ⅱ, the residues were extracted from homogenized tissue with acetonitrile-water under ultrasonication, and then were separated by liquid-liquid partition.

在样品前处理方法Ⅰ中，样品经丙酮-乙酸乙酯-正己烷(体积比为1∶1∶1)混合溶剂提取，乙腈转溶；在样品前处理方法Ⅱ中，样品用乙腈-水溶液均质，超声波辅助提取，液-液分配。

Reaction pushes the plane through the air, just as reaction sends skyrockets into the heavens

确定当含有丙酮酸脱氢酶的兔肌肉线粒体用下列方法处理时，这个反应的速率有何变化

The similar nicotinoyltrifluoroacetones are synthesized from acetylpyridine and ethyl trifluoroacetate through Claisen reaction.The influnences of alcoholic natrium,reaction temperature and solvent on reaction yield is studied.The subliming method is improved.

本文以乙酰吡啶和三氟乙酸乙酯为主要原料，利用克莱森酯缩合反应，合成了三种相似结构的吡啶甲酰三氟丙酮化合物，考察了碱性试剂醇钠、反应温度和溶剂等因素对反应产率的影响，改进了纯化产物的方法。

Furthermore, for low concentration alcohol and acetone sensitivity and concentration have linearity, so this material is good sensitive material.

因此，CoFe_2O_4是一种检测乙醇、丙酮的有发展前途的气敏材料。

However, the resistance and gas sensitivities to alcohol and acetone increased as Co_3O_4 increased.

随着Co_3O_4掺杂量的增加，Co_3O_4-SnO_2样品的电阻和对酒精和丙酮的灵敏度有了很大的提高，并达到最大值；而当量Co_3O_4量继续增加时，电阻和灵敏度又开始下降。

Because the reaction followed the S〓2 mechanism, addition of proper amount of acetone or alcohol increased the degree of substitution.

因为反应过程是按S〓2历程进行，加适量的有机溶剂丙酮或乙醇能增加HP—β—CD产品的取代度。

Wet etching is always followed by a an acetone or alcohol rinse, which in turn is followed by a DI water rinse.

湿蚀刻总是随后一丙酮或酒精冲洗，而这又是由离子水冲洗进行。

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。