丙酮

The results show that the zirconium sol has good spinnability when n: n= 1:3, reaction time is 6h and aging temperature is 15℃. The ZrO_2precursor fibers are made from hydrous zirconia chelated by acetylacetone. The sintercd fibers arecomposed of metastable tetragonal phase and sized about 15μm in diameter. Moreover, there aremany pores inside the fibers, but no cracks.4. ZrO_2/PVP hybrid fibers were prepared by blending the spinnable zirconium sol and 10 wt%PVP solution.

结果表明，当n(ZrOCl_2·8H_2O)：n(H_2O_2)=1：3，反应时间6h，陈化温度15℃时可得纺丝性能良好的锆溶胶，ZrO_2前驱体连续纤维的组成主要为经乙酰丙酮配位的ZrO_2水合物，热处理后的ZrO_2纤维的相结构为亚稳四方相，纤维的直径为15μm左右，纤维中存在大量的纳米级气孔，但无明显裂纹。4。

Fibrous hydrous zirconia, spinnable hydrous zirconia chelated by acetylacctone and modifiedhydrous zirconia were synthesized from zirconium oxychlorid(ZrOCl_2·8H_2O) and then applied toprepare ZrO_2/PVA electrospinning hybrid fibers, ZrO_2/PVA continuous hybrid fiber and ZrO_2/PVPhybrid microsphere respectively. The chemical structure, properties, microstructure and formationmechanism of the corresponding materials were investigated.

论文以无机盐ZrOCl_2·8H_2O为原料，合成出纤维状的ZrO_2水合物、乙酰丙酮配位的可纺性ZrO_2水合物和正丁醇改性的ZrO_2水合物，分别与PVA和PVP杂化复合，制备出ZrO_2／PVA杂化电纺纤维、ZrO_2／PVP杂化连续纤维和ZrO_2／PVP杂化微球，并对相关材料的组成、结构、性能及形成机理等进行了深入分析和研究。

However, when trans-4-aryl-3-buten-2-ones were taken as the substrates, the electron-rich but less sterically hindered ligand 9c gives the best results (up to 96.4 % ee) with highly catalytic activity.

而富电子但空间位阻小的配体9c对亚节基丙酮类底物获得最好的结果(%。4%ee)，同时还表现了最好的化学活性。

A silicon carbide slurry as a casting abrasive material was prepared by sulphonated acetone-formaldehyde polymer as a dispersant.

由自制的磺化丙酮-甲醛缩聚物(sulphonated acetone-formaldehyde plymer，SAF)作为分散剂制备了浇注碳化硅砂轮水基浆料。

The ligand of the chiral Schiff base and acetylacetone vanadium are subjected to complexation in situ, hydrogen peroxide is taken as an oxidant, aryl alkyl thioether asymmetric oxidation reaction is catalyzed in a toluene or dichloromethane solution under low temperature or room temperature, enantioselectivity of chiral sulphoxide is 72 percent to 95 percent ee, and yield is 42 percent to 83 percent.

将上述手性西佛碱配体与乙酰丙酮氧钒原位络合，采用双氧水为氧化剂，在甲苯或二氯甲烷溶液中低温至室温下催化芳基烷基硫醚不对称氧化反应，手性亚砜的对映选择性为72％-95％ee，产率为42％-83％。

Topically treated with acetone extracts of the leaves of Tephrosia vogelii Hook f .

用非洲山毛豆叶丙酮提取物或鱼藤酮点滴处理菜粉蝶幼虫，出现畸形幼虫和畸形蛹。

By GAS recrystallization HMX(1,3,5,7 tetranitro 1,3,5,7 tetraazacyclooctane),we can obtain microparticle β HMX with different particle size and distribution.The effect of temperature on morphology of HMX in the processes of supercritical carbon dioxide antisolvent recrystallization in acetone solution was studied.

研究了以丙酮为溶剂的超临界 CO2 - GAS重结晶制细过程温度对 HMX晶型的影响，结果表明：超临界 CO2 - GAS重结晶 HMX过程与常规的重结晶过程相似，温度对 HMX晶型起控制作用，而对颗粒尺寸影响不大；当局部操作温度大于 5 0℃时，结晶颗粒中会有α型 HMX生成；当整体温度大于 6 0℃时，产品中α型 HMX占主要部分。

Any of several esters, other than the ethyl ester, of carbamic acid .Any of a group of enzymes that catalyze transamination.

苯丙酮尿一种先天性代谢异常，其机体缺乏将苯丙氨酸代谢成酪氨酸所必需的酶。

This paper reviews the recent progress on the Chinese syntheic research of marine natural products according to type classifications: marine cyclopeptides, cembranes, cembrenss, cembranolides, quinolone derivativcs, triacetonamine and subergorgic acid analogues.

本文综述中国海洋天然产物合成研究的最新进展，包括海洋环肽、西松烷和西松烷型二萜内酯、喹啉酮衍生物和三丙酮胺以及柳珊瑚酸类似物等。

Krebs cycle (citric acid cycle; TCA cycle; tricarboxylic acid cycle) A complex cycle of reactions in which pyruvate, produced by glycolysis, is oxidized to carbon dioxide and water, with the production of large amounts of energy.

卡尔文循环（柠檬酸循环， TCL 循环，三羧酸循环）：糖酵解过程中产生的丙酮酸，被氧化为二氧化碳和水并产生大量能量的复杂反应过程。

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。