丙酮的

Furfurylidene acetone obtained from acetone and furfuratdehyde by condensationwas used as a brightener in an acid-sodium chloride type Zn electroplating bath.

由丙酮和呋喃甲醛经缩合反应所制得的呋喃叉丙酮，用作酸性氯化钠型镀锌的光亮剂。

Supplement of pyruvate can increase serum LPL levels remarkably(p.05)and decrease serum HL level but no significant statistical difference in rats and swimming rats, decrease serum T4 levels during resting obviously(p.05)in rats and reduce serum T4 levels to certain extent in swimming rats. It indicated that pyruvate supplement could regulate lipometabolism in rats and swimming rats by means of the effect on enzyme and hormone levels.

丙酮酸补充还可明显降低大鼠血糖水平(P.05)，一定程度地升高其血清FFA水平；明显降低大鼠血清TC水平和游泳大鼠血清TG水平(p.05)，使大鼠和游泳大鼠血清HDL-C含量呈一定的升高趋势，并明显降低了游泳大鼠血清LDL-C水平(P.05)，这表明丙酮酸具有持久、稳定的降血脂作用，配合运动补充，作用效果可能会更明显；4。

Acetylpyruvic acid methyl ester can be synthesized by the condensation of dimethyl oxalate and acetone in the presence of sodium methoxide.

叙述了在催化剂甲醇钠的存在下，以草酸二甲酯和丙酮为原料合成乙酰丙酮酸甲酯的工艺。

Then with V∶V=11 9∶1 0,and by bubbling of air at 65-70 ℃ for 5-8 h,pyruvaldehyde was produced in 59 6% yield.

丙酮醛的总收率达 37 8%。n∶n∶n(1，2 丙二醇)=1 0∶4 0∶(1 5～ 2 5 )，以水为溶剂，在 6 0～ 70℃间歇通入氮气 1 5h ，边加原料边蒸馏，制得产率为5 0 %的丙酮醛。

Hydrothermal reactions makes water a Bronsted base-acid and act as an effective catalyst and the metal ions represent Lewis base character. The conversion process occurs in a very complex network of parallel, consecutive and equilibrium reactions, and the last step being the catalyzed Cannizzaro-type reaction of pyruvaldehyde to lactic acid.

nsted酸碱并具有一定的催化作用，金属离子在水热催化降解丙酮醛生成乳酸中表现出Lewis碱的特性，能与丙酮醛生成金属复合物，最终生成乳酸，此反应过程符合Cannizzaro反应特性。

The result indicates that the best method for extracting β-carotene is to saponify the test specimen one hour with 4% NaOH methyl alcohol solution in 60-70'c and then to separate with 3:7 acetone-benzine component solvent as extraction solvent, MgO as the absorbent, the acetone-benzine as the eluent. Extracted solvent has been determined in the color dish condition (1cm) by ultraviolet spectrophotometer at 447 nm. The result shows that the β-carotene in carrotis 0.134 mgg^(-1), 0.0863mgg^(-1) in red pepper and 0.0426 mgg^(-1) in spinach.

结果表明，比较优先的β-胡萝卜素提取方法是：试样用4% NaOH甲醇溶液在60℃~70℃皂化1h，用3：7的丙酮－石油醚混合溶剂提取，以Mgo为吸附剂，丙酮－石油醚为洗脱剂分离，提取液用紫外分光光度计在波长447nm，1cm比色皿条件下测定，得出蔬菜中β-胡萝卜素含量：胡萝卜为0.134mgg^(-1)，红椒为0.0863mgg^(-1)，菠菜为0.426mgg^(-1)。

To 10 g of the substance being examined, coarsely powdered, add 100 ml of acetone R and allow to stand for 20 min. Add 1 ml of a solution containing 1.8 μg/ml of carbophenothion R in toluene R. Homogenise using a high-speed blender for 3 min. Filter and wash the filter cake with two quantities, each of 25 ml, of acetone R.

称取10g的检测样品，粉碎成粗粉，加入丙酮100ml，静止20min，加入1.8ug/ml的三硫磷-甲苯混合溶液1ml，高速搅拌3分钟，过滤，用丙酮洗涤滤纸两次，每次25ml。

The results show the hydrogen bonding is formed between acetone and water molecules and the strength of hydrogen bonging is related to the concentration of acetone.

由此说明丙酮与水分子间形成了氢键，而且氢键的强弱与丙酮水溶液的浓度有关。

Proteomic comparison of glucose- and lactose-grown cells revealed that lactose and glucose were catabolized via the same degradation pathway, and the rate of glucose assimilation was higher than that of lactose.

长双歧杆菌NCC2705在乳糖中生长快于葡萄糖，它们的降解途径是相同的；转醛缩酶和丙酮酸激酶发生了翻译后修饰作用，推测转醛缩酶在43T和47S发生了磷酸化，而丙酮酸激酶在65S发生了磷酸化。

METHODS:Based on the extraction rate of chlorophyll,acetone method was compared with alcohol method and the preparing factors of acetone method was optimized by orthogonal design.

以叶绿素提取率为指标，对脱镁叶绿酸制备的乙醇法和丙酮法工艺进行比较，用正交试验法对丙酮法的工艺条件进行优化。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。