查询词典 acetone

HCHO drops spirally along with the time,and but with transitory rises in summer,acetone and acetaldehyde decreases wavily.

空气中甲醛随使用时间的延长呈现伴夏季升高的螺旋样下降趋势；丙酮和乙醛呈波浪样下降；VOCs的污染水平使用初期最高，但下降较快，1个月后至初始的1/10～1/20。

The SPC-2S fraction with 30% EtOH were constituted epicatechin and epicatechin gallate ester ;The SPC-2S fraction with 50% EtOH contained epicatechin and dimeric procyanidins, another SPC-3S contained epicatechin ,dimeric procyanidins and trimeric procyanidns ;Dimeric procyanidins and trimeric procyanidns constitute SPC-5S fraction;monomer dimer trimer tetramer pentamer of procyanidins were the major fractions in 70% acetone elute solution.

1和 2.01：1，也以添加0.1%SPC酒样中两者的比例最为协调；对小曲酒中酸的影响表现为，添加SPC后有利于降低酒样中乙酸的含量，各酒样中乙酸的量随着SPC添加量高粱外种皮中原花青素及其对小曲白酒挥发性成分影响机制研究的增加而降低；对醛类的影响为，添加SPC可降低酒样中糠醛的含量，其中以添加 0.1%SPC酒样中含量最低，为对照组的39.3%，而4个酒样中乙醛含量则无明显差别；低SPC添加量有降低酒样中杂醇油含量的趋势。

It is found that the solubility of dl-p-HPGS is very small in pure acetone and in the solvent with low water content.

在纯丙酮和低含水量的混合溶剂中，对羟基苯甘氨酸硫酸盐溶解度很低。

Methods: The pesticides were extracted with acetone and dichloromethane. The extract was warmed with water at 80℃, circumrotated and evaporated until it was nearly dry. Then it was cleaned-up by Envi-Carb column and Sep-Pak-NH2 column.

本法采用丙酮、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、氨基甲酸酯和除草剂等32种农药残留。

One of his bitch's cribs, I guess. I'm like, Acetone?

&|我猜是他一个情妇的住处我就像&丙酮？

No.16A was treated by acetone into three groups of degumming liquor with different compositions of pectinase and-βmannanase.

No.16A发酵液中的果胶酶和甘露聚糖酶处理成不同活性比例的3组脱胶酶液。

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。

The products were identified by IR,NMR,MS and elemental analysis. In our method,K.OH was used in place of NaOH to synthesize benzyl ester of 3,5-dimethyl-4-hydroxybenzoic acid,2',6'-dimethyl-4'-(n-succinimidyloxycarbonyl) phenyl-acridinium-9-carboxylate was purified on a silica gel column with chloroform/ethylacetate(4:l,v/v) as eluent and further purified by triturating with hexane/acetone(2:l,v/v).The luminescence produced by DMAE-NHS is a flash light with maximumemission at 0.4s and decay half-time of 0.9s. The luminescence intensity is 6.11x10 cps/mol,which is affected by the composition of trigger and surfactant.

DMAE·NHS的合成是本论文的关键和难点，我们对文献方法进行改进：文献方法用氢氧化钠与3，5-二甲基-4-羟基苯甲酸反应制得3，5-甲基-4-羟基苯甲酸钠，再用3，5-二甲基-4-羟基苯甲酸钠与苄氯作用制备3，5-二甲基-4-羟基苯甲酸苄酯，我们用氢氧化钾代替氢氧化钠，使合成取得成功；在合成2'，6'-二甲基-4'-苯基-吖啶-9-甲酸酯时，文献方法对粗产品进行两次硅胶柱层析纯化，第一次柱层析用氯仿/乙酸乙酯(4：1，Ⅴ：Ⅴ)作溶剂和淋洗剂，第二次柱层析用己烷/丙酮(2：1，Ⅴ：Ⅴ)作溶剂和淋洗剂，按照文献方法得到的不是所需要的化合物，我们只进行第一次柱层析纯化，然后用己烷/丙酮(2：1，Ⅴ：Ⅴ)进行研磨，过滤，洗涤，除去溶于己烷/丙酮(2：1，Ⅴ：Ⅴ)的部分，得到所需要的产品。

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。