丙酮的

Compared with the absorption positions of chlorophyll in acetone, a bathochromic shift was observed at the absorption peaks of chlorophyll in DMF and DMSO.

与叶绿素在丙酮溶剂中的光谱特性吸收峰位置相比较，叶绿素的光谱特性吸收峰在DMF与DMSO两种溶剂中显现了向红位移。

Through the determination of 2-chlorobenzaldehyde and benzalacetone in additive for electroplating, the method was proved to be accurate, simple and rapid.

建立的方法用于电镀添加剂中邻氯苯甲醛、苄叉丙酮含量的测定，结果准确，操作简便、快速。

Use tertiary system method to screen and optimize JLNCAO substrate, and use heat and dry under atmospheric pressure method, ignition residue method, The Casparian law of trace nitrogen, acid...

运用三级系统筛选法对菌草培养基进行筛选优化；用常压加热干燥法、灼烧法、微量凯氏定氮法、酸性洗涤剂法、氨基酸自动分析仪、原子荧光光谱和原子吸收光谱、乙酰丙酮法和热水提取多糖法分别对菌草香菇和木屑香菇的水分、灰分、蛋白质、纤维素、氨基酸、重金属、甲醛、香菇水溶性多糖等的含量进行比较研究。

Different concentration methanol-, acetone-, ether-, and chloroform extracts of Corallina pilulifera were used to study their growth inhibitory effects on red tide microalgae Heterosigma akashiwo.

研究了不同浓度的小珊瑚藻组织4种不同极性有机溶剂（甲醇、丙酮、乙醚、氯仿）提取物对赤潮异弯藻的生长抑制作用。

The results of the herbicidal effects study display that 1,4-dioxoquinoxaline formaldehyde-salicylic aldehyde dihydrazone and 1,4-dioxoquinoxaline formaldehyde acetone dihydrazone have obvious herbicidal activity.

研究结果表明1，4-二氧喹喔啉-2-甲醛-水杨醛双腙和1，4-二氧喹喔啉-2-甲醛-丙酮双腙表现较明显的活性，在500mg/L浓度时对稗草的株防效分别为51.3%和55.0%；对油菜株防效较弱，分别只有33.5%和17.5%。

Its mainly produced by cumene peroxidation process, which requires three steps of reactions and is limited by the market requirement of equimolar byproduct acetone.

目前工业合成苯酚的最主要方法是异丙苯法，此法经过三个步骤：以苯和丙烯为原料，在酸催化下生成异丙苯，异丙苯经氧化生成过氧化氢异丙苯，再用硫酸或树脂分解，同时得到等摩尔的苯酚和丙酮。

Total volatile components, acetone, cyclohexadiene, cyclopentyl ethyne, acetic acid and hexanal contents show more significant correlation with storage time, physiological biochemical indexes respectively, and it can be used as an assessment index for the storage quality of stored maize.

总挥发性物含量、丙酮、对环己二烯、环戊乙炔、乙酸、己醛的含量与储藏时间、生理生化指标呈较高相关性，可作为玉米储存品质变化的评判指标。

The model solvents included ethanol,acetone,ethyl acetate and tetrachloromethane.And 1-hexyl-3-methylimidazolium bromide and 1-hexyl-3-methylimidazolium fluoroborate were used as the model RTIL.

结果表明，两种离子液体吸收乙醇或丙酮后，它们的电导率和介电常数显著增加，而四氯化碳对两种液体的电学阻抗特性影响较小。

Two synthetic routes starting from 1,3-dihydroxyacetone and formamidine acetate as well as imidazole-4,5-dicarboxylic acid as starting material were investigated, and the reductive reaction of ethyl imidazole-4-carboxylate was also investigated.

本文对以1，3-二羟基丙酮和醋酸甲脒为原料和以4，5-二羧酸咪唑为原料合成4(5)-羟甲基咪唑的两条工艺进行了研究并优化，同时对4(5)-羧酸咪唑乙酯的还原反应进行了探索性实验。

Confirm the optimum extraction technics of polyphenol of Humulus lupulus by single factor and orthogonal test: impregnant's concentration 70%, the ratio of materiel and impregnant 1:25, circumfluence temperature 45℃, time 1h and extraction quantity achieve 47.29mg/g dry Humulus lupulus at this condition.

通过单因素和正交试验确定了酒花多酚的最佳提取工艺：浸提剂为70%丙酮，料液比1：25，回流提取温度45℃，提取时间为1h，在此条件下多酚的提取量达到47.29mg/g干酒花。

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。