环

Now over 100 cyclotides have been isolated from about 30 species of Violaceae, Rubiaceae and Cucurbitaceae. Most contributions on cyclotides has been achieved by the groups in Australia, Sweden and USA, and no researches related to cyclotides are reported by Chinese scientists.

所在研究组长期从事植物环肽方面的研究工作，具有较好的研究基础，为了拓展环肽研究范围，本论文选择了两种鲜有环蛋白报道的堇菜属植物三色堇（ Viola tricolor L。

New progress on the catalytic epoxidation of cyclohexene was reviewed.

综述了环己烯催化氧化法合成环氧环己烷的最新研究进展。

Under the optimized conditions the conversion of cyclohexene and the selectivity of epoxycyclohexane could reach up to 91.4% and 86.3%, respectively.

在此条件下环己烯的转化率可达91.4%，环氧环己烷的选择性达86.3%。

The results reveal that the supported catalyst has high catalytic activity and good selectivity of epoxide for the epoxidation of cyclohexene and styrene, respectively.

上述结果表明该负载催化剂对环己烯和苯乙烯的空气环氧化具有很高活性和环氧化物选择性。

The catalytic activity of iodine in the esterification reaction was studied by synthesis cyclohexyl acetate from acetic anhydride,cyclohexano and acetic acid,cyclohexano.

以单质碘为催化剂，通过乙酸酐、环己醇及乙酸、环己醇为原料合成乙酸环己酯，对碘的催化活性进行了研究。

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制备环戊二烯的实验条件。该法操作简单，环戊二烯纯度达95%，收率可达85

The preparation method of cyclopentadiene from bicyclopentadiene with liquid phase thermal decomposition method is studied.

研究了采用液相热分解法由双环戊二烯制取环戊二烯的方法。该法操作简单，连续化。环戊二烯纯度达98％－99％，收率85

The results showed: at the reaction temperature of 25～30 ℃,hydrogen pressure of 1.0～1.5 MPa,Vethanol∶Vcyclopentadiene of 5～6∶1,the catalyst dosage of 4 %～5 % and stirring rate of 800 r/min.The conversion of cyclopentadiene was above 98% and the selec...

结果表明，在反应温度25-30℃，氢气分压为1.0-1.5 MPa，无水乙醇作为溶剂，V无水乙醇∶V环戊二烯为5-6∶1，催化剂用量为4%-5%，搅拌速度为800 r/min条件下，反应时间2~3 h，环戊二烯的转化率大于98%，环戊烯的选择性大于95%。

Starain LHG1 could not only utilize the intermediate products of cycloalkanes－clohexanone and cyclopentanone, but also could degrade alkane, aromatic hydrocarbon and phenols, such as liquid paraffin,solid paraffin, naphthalene and phenol.

LHG1菌株能够利用环烷烃代谢的中间产物环己酮和环戊酮。此外，LHG1菌株还能降解液体石蜡、固体石蜡、萘和苯酚等链烃、芳香烃和酚类。

To enable the fabrication of thermally stable ultralow dielectric constant film, specific precursor materials are used, such as, cyclic siloxanes and organic molecules containing ring structures, for instance, tetramethylcycloterasiloxane and cyclopentene oxide.

为了能够制造热稳定超低介电常数材料，使用特定的前驱物材料，例如环硅氧烷和例如四甲基环四硅氧烷和环戊烯氧化物这样包含环状结构的有机分子。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。