丙酮化

Under the basic condition, benzylacetone (1) was prepared by condensation with benzaldehyde and acetone.

以苯甲醛和丙酮为原料，氟化钾氧化铝作催化剂合成了苄叉丙酮。

Unsaturated alkynyl alcohols, such as dehydronerolidol, dehydrogeranyllinalool, and dehydroisophytol, were prepared by ethynylation of turpentine derivatives, namely terpenylacetones, e. g. geranylacetone, farnesylacetone, and phyton under normal pressure in presence of alkali metal hydroxide and organic solvents.

松节油衍生物格萜烯基丙酮，如香叶基丙酮、金合欢基丙酮和植物酮在常压条件，碱金属氢氧化物和有机溶剂存在下可发生乙炔化反应，形成对应的α，β-不饱和炔醇化合物脱氢橙花叔醇、脱氢香叶基芳樟醇和脱氢异植物醇。

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

9使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸，较高温度下实现乙酰丙酮的肟化反应。

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸、高温下实现乙酰丙酮的肟化。

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。

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。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amines as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved. In addition, 1-[3,5-bisphenyl]-2-propanone is a new compound among the synthesized compounds. This approach is an efficient synthetic method for the aryl-propanones with the different substituting groups.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基－2-丙酮，其中1-（3，5-二三氟甲基苯基）2-丙酮是一个新化合物改进后的方法简化了合成步骤，提高了收率，可方便地用于在苯环上具有不同取代基的芳基丙酮的合成。

Simultaneously, the activity and coding gene expression of ribulose 1, 5-bisphosphate carboxylase, phosphoenolpyruvate carboxylase, and glycollic oxidase all decrease in two rice accessions under low potassium supply while significant decrease in non-allelopathic rice "Lemont".

水稻光合作用相关酶的分析结果表明，低钾条件下核酮糖－1，5-二磷酸羧化酶、磷酸烯醇式丙酮酸羧化酶和乙醇酸氧化酶的活性及其基因表达强度均降低，但化感水稻&PI312777&的下降幅度显著小于非化感水稻&Lemont&。

The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.

本发明利用磺化法苯酚生产中的工业副产品，或者对甲酚和保险粉生产过程中副产品(Na 2 SO 3 含量在60～85％)生产脂肪族高效减水剂，采用丙酮、甲醛、工业副产物、亚硫酸盐和或焦亚硫酸钠作为原材料，在水介质中进行磺化和缩合反应，反应物的质量比为丙酮∶甲醛∶亚硫酸盐副产品∶水＝1∶2.5～4.5∶1.5～2.6∶4.0～6.0，所得到的缩合物的质量浓度为30～42％，粘度为20～100m。

The reaction catalyzed by DAK converts DHA into dihydroxyacetone phosphate which is no toxic and can be ustilized by yeast cells. DAK presents in most organisms. DAK genes in the Saccharmyces cerevisiae and P. pastoris were cloned and characterized by a combined genetic and biochemical approach and the proteins encoded by these DAK genes are homodimer.

二羟基丙酮对酵母细胞来说是种有毒的化合物，在酵母菌中二羟基丙酮激酶参与二羟基丙酮的脱毒作用，DAK催化的反应使二羟基丙酮磷酸化，形成无毒性的磷酸二羟丙酮，可为酵母细胞所利用。

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。