丙酮

The results showed that polar acetone was beneficial to the desorption of methanol, however the effect of nonpolar heptane on the extraction of methanol was more evident.

研究表明，极性溶剂丙酮能够促进甲醇脱附，而非极性溶剂正庚烷对孔道中甲醇有更强的萃取能力。

Regulation of glycolysis The main control step is that catalyzed by PFK but hexokinase and pyruvate kinase are additional control sites.

糖酵解的调节主要控制步骤是 PFK 酶的催化作用，而己糖激酶和丙酮酸激酶则是另外的控制位点。

When the concentration of glucose was 21.58 mmol/L, the activities of hexokinase and pyruvate kinase increased by 39.7% and 64.3%, respectively. However, the specific consumption rates of glutamine, serine and leucine were markedly decreased with the increased glucose concentration.

当葡萄糖浓度为21.58 mmol/L时，己糖激酶与丙酮酸激酶活性分别比缺失葡萄糖时增加了39.7%和64.3%，而谷氨酰胺、丝氨酸、亮氨酸等氨基酸的比消耗速率却随着葡萄糖浓度的增加而显著降低。

Other products include tea polyphenols, one for green food and cosmetic additives, and diacetone acrylamide, a new type of polymer monomer, used in the manufacture of waterborne coatings, photographic materials and lubricant additives, such as special polymer materials and has the second acid hydrazide, a coating applied to cross-linking agent, widely used in water-based coatings, adhesives.

其它产品包括茶多酚，一种用于食品和化装品的绿色添加剂，和双丙酮丙烯酰胺，一种新型高聚物单体，用于制造水性涂料、感光材料和润滑油添加剂等特殊高分子材料及已二酸二酰肼，一种适用于涂料用交联剂，广泛用于水性涂料，粘合剂。

MMA is produced by the method of acetone-cyanhydrin mainly in our country. The synthetic route is complex, the technical line is long, and the yield is low with high cost after many steps. Hydrocyanic acid is used as raw material, the treatment of numerous waste acid is difficult . Furthermore, concentrated sulfuric acid consumed in this method corrodes equipments and pollutes the environment seriously.

我国MMA的生产以丙酮腈醇法占主导地位，合成路线复杂，生产工艺长，多步反应后产率低，成本高，其采用有剧毒的氢氰酸为原料，产生大量难于处理的废酸，所消耗的浓硫酸对设备腐蚀性大，对环境污染严重，因此开发新的MMA工艺路线很有必要。

Including high-purity synthetic hydrobromide, hydrogen bromide acetic acid solution, hydrogen bromide acetone \ dichloromethane solution, sodium bromide, calcium, ammonium and other inorganic bromide, Bromochloromethane second bromomethane, 1 - bromo --3 - chloropropane organic bromide.

包括高纯度合成氢溴酸、溴化氢醋酸溶液、溴化氢丙酮\二氯甲烷溶液、溴化钠、钙、铵等无机溴化物，溴氯甲烷、二溴甲烷、1-溴-3-氯丙烷等有机溴化物。

The analysis of hydrogen-producing nature was presented through the point of catalysis of hydrogenase, the production of energy and its transportation. From author's view, the course of de-hydrogen from pyruvic acid to acetyl-CoA was the chief determinant for hydrogen producing. And the balance and adjustment of NADH/NAD〓 was just the necessary condition, not the foundation reason.

本文从产氢反应的催化体系、能量产生和传递等不同角度对产氢本质进行了系统的理论分析，认为产氢发酵的第一判定条件（即产氢发酵的充分必要条件）是丙酮酸-乙酰CoA脱氢过程；而NADH／NAD〓的平衡调节机制只是必要条件，不是产氢发酵的根本动力。

Tons; acetone 4,000 yuan / ton; hydroquinone 15,000 yuan / ton; natural gas (6 Pressure) 2600 yuan / ton.

吨；丙酮4000元/吨；对苯二酚15000元/吨；天然液化气(6个压)2600元/吨。

Solid bases, quantity of acetylacetone, quantity of sodium hydroxide, and grinding time were investigated.

考察了碱的种类，乙酰丙酮的量，NaOH的量，以及研磨时间对产率的影响。

In recent years, the demand for methylglyoxal increased with the rise of the demand for imidazole and furanone.

近年来随着咪唑以及呋喃酮等香料需求的增加，丙酮醛的需求也在逐步升高。

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。