丙酮

The molecular weight dependence of the distribfition of polymer molecules between the coacervate and the dilute phases on the phase separation of polymethylmethacrylate-acetone-methanol system has been proved to follow the relation first derived by Flory for binary systems: f"_j/f′_j = Qe~_j where f"_j and f′_j are the weight fractions of the polymer molecules of molecular weight M_j in the coacervate and in the dilute phases respectively, while Q and σ are parameters.

1。聚甲基丙烯酸甲酯-丙酮-甲醇体系的两次分相实验用θ-溶剂中的沉降速度法测定分相前试样和浓相的分子量分布曲线，得到高分子在浓稀相重量分配的分子量依赖关系 f_j=Qe~证实Flory的溶度函数形式与实际相符，并适用于三元体系的相分离，但Q值与两相体积比R值并不相同。 2。再分级使级分的分子量分布宽度随再分级次数的增加而减小，通常认为到第三次再分级其效果已不显著并不确实。

Potassium ions are required in high concentrations in the cell for efficient protein synthesis, and for glycolysis in which they are an essential cofactor for the enzyme pyruvate kinase.

在细胞中 K+需要维持较高的浓度，以便有效的进行蛋白质合成，另外在糖酵解中 K+也是丙酮酸激酶必需的辅助因子。

According to the building blocks concept dicyandiamide N≡C-NH-C (NH〓=NH was selected as the precursor to improve the nitrogen content in the electrodeposited carbon nitride films.

以丙酮为分散介质，在阳极电沉积过程中制备得N含量为48％的氮化碳薄膜，此膜中有一定量的C=N和C≡N键，热退火使得C≡N减弱，C-N增强。

Molecular conformation calculations were made for two possible conformers(eclipsed and staggered with respect to the methyl group)of the compound Calculated results show that:the stable conformer of pyruvic acid is the eclipsed one;The BLYP/6-31G* and scaled HF/6-31G* frequencies correspond well with each other and with available experimental assignment of the normal vibrational modes.

结果表明：在丙酮酸分子的两种构象中，重叠式比较稳定*B3LYP计算得到的构型参数与实验结果比较一致；在振动频率的计算中，BLYP未标度力场所计算的非CH3伸缩振动基频预测值和实验值的平均绝对偏差为10.4cm-1；而HF标度力场的平均绝对偏差为17.9cm-1。

Acetone extract of E.hirta may be toxic to spores of C.musaram. Ethyl acetate extrate of E.hirta may have inhibiting effects on conidium germination and mycelium growth of C.musaram.

大飞扬的丙酮提取物对芭蕉炭疽菌孢子可能具有毒害作用，乙酸乙酯提取物使芭蕉炭疽菌和链格孢菌的孢子芽管生长不正常。

Acetone extractive of Euphorbia hirta may be have viricidal effect on spores of C. higginsianum. Ethyl acetate extractive of E. hirta may be have inhibited effects on conidium germination or growth of hypha of C. higginsianum.

大飞扬草的丙酮提取物对炭疽菌孢子可能具有毒害作用，乙酸乙酯提取物使炭疽菌和链格孢菌孢子芽管生长不正常，且对其菌丝生长具有抑制作用。

Their structures were characterized as dihydroconiferyl dihydro-p-coumarate, vanillin, apocynin, p-hydroxybenzaldehyde, syringaldehyde, syringic acid, syringylethanone,α-hydroxypropiosyringone, coniferyl aldehyde, dihydroconiferyl alcohol, 2-hydroxyphenylpropanol, and 3-hydroxy-4-methoxy-phenylethanol, respectively.

结果 从该植物中分离得到12个酚性化合物，其结构分别为二氢松柏醇二氢对羟基桂皮酸酯，香草醛，罗布麻宁，对羟基苯甲醛，丁香醛，丁香酸，丁香乙酮，α-羟基丁香丙酮，松柏醛，二氢松柏醇，2-羟基苯丙醇和3-羟基－4-甲氧基苯乙醇。

Direct oxidation of benzene to phenol, in contrast with the Hock reaction, has the merit of not only utilising nitrous oxide as an oxidising agent but also the absence of acetone as a coproduct and simpler separation processes.

直接氧化苯酚，反观与典当反应不仅具有优异的氧化剂使用笑气作为而且由于缺乏丙酮一个简单的副产品和分离工序。

Smokeless powder又称为cordite【A smokeless explosive powder consisting of nitrocellulose, nitroglycerin, and petrolatum that has been dissolved in acetone, dried, and extruded in cords.

无烟线状火药，一种无烟炸药，由硝化纤维素、硝化甘油和凡士林组成，在丙酮中溶解，风干并压成绳状），属于double base powder硝化甘油与硝化纤维双基火药），是跟黑火药完全不同的东西。

The cori cycle During vigorous exercise, pyruvate produced by glycolysis in muscle is converted to lactate dehydrogenase .

Cori 循环当剧烈运动时，在肌肉中糖酵解产生的丙酮酸被乳酸脱氢酶转化为乳酸。

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。