烯酮

Keywords ketene;isopropenyl acetate;esterification;strong acidic cation-exchange resin;fine chemical intermediates

乙烯酮；乙酸异丙烯酯；酯化反应；强酸性离子交换树脂；精细化工中间体

Most bacteria were resistant to βlactam antibiotics, but sensitive to aminoglycosides, Carbopenem antibiotics and quinolones antibiotics.

细菌多对β内酰胺类抗生素耐药，普遍对氨基糖苷类、碳青酶烯类和喹诺酮类抗生素敏感。

About the identity of the limonene in your sample.

讨论一下香芹酮对映体的鉴定对你样品中柠檬烯的鉴定有什么启示。

The pressure should read less than 10 mm Hg (10 Torr) on the manometer.

利用这个实验最后的图表，以压力计的压力读数为依据，确定柠檬烯和香芹酮馏份蒸馏时的起始温度。

Its seed has abound oil, among which, z-15-tetracosenoic acid is considered tobe the ideal raw materials of muscone synthesizes, so Malania oleifera has quite greatvalue on exploitation and utilization.

蒜头果种子富含油脂，其中二十四碳-15-烯酸是合成麝香酮的理想原料，具有较大的开发价值。

The results showed that the thermo-sensitivity of hairy PNIPA changed obviously in the presence of hairy PAA as polyelectrolyte.4-cyanopentanoic acid dithiobenzoate as soluble reversible addition-fragmentation chain transfer agent was directly added into the above PS particles with photo-initiator on the surface and NVP or NIPA as monomer.

其次，将水溶性RAFT试剂直接引入上述光引发聚合体系，探讨连续相中RAFT试剂的存在对微球表面N-乙烯基吡咯烷酮或N-异丙基丙烯酰胺聚合的影响，考察了RAFT试剂对聚合过程中微球壳层高分子毛发厚度和单体转化率变化趋势。

The catalytic property was tested by hydrogenation ofα-octene, cyclohexene and nitrobenzene in ethanol, octane and cyclohexane were prepared at normal temperature and under hydrogen pressure in a 100% yield, respectively.

聚乙烯吡咯烷酮负载纳米钯的超细纤维状催化剂，钯纳米颗粒直径在15 nm以下，并且纳米颗粒负载分布均匀，在室温下催化α-辛烯的加氢反应，产率可达到100%。

There will always be enough pentane in the syringe to leave a small peak on thechromatogram.

利用适当峰的峰面积，可以计算在每一种馏份和原油中的香芹酮和柠檬烯的含量。

There will always be enough pentane in the syringe to leave a small peak on the chromatogram. The retention time of

利用适当峰的峰面积，可以计算在每一种馏份和原油中的香芹酮和柠檬烯的含量。

The forming mechanism of dihydrophenophosphazine by the interaction of Ph〓NH and PCl〓 was studied, and the possible forming mechanism of spiro phosphonium chloride in the same reaction system was also proposed.

讨论了二苯胺与三氯化磷的成环机理以及反应过程中螺磷杂环化合物的形成机制，提出5，10-二氢磷杂吖嗪-10-氧化物存在类"烯醇—酮式"互变异构现象。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。