查询词典 selectivity

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%。

For the sake of increasing the selectivity of cyclohexene, we suggest that the support and the related precusor of the active component will be disposed in a certain way.

文章提出只有通过对载体及相应的活性组分前驱物进行一定的预处理，才能有效地增加催化剂对环己烯的选择性。

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 method ensures safety and enhances heat transfer, and can remarkably improve the oxidizing reaction speed of cyclohexane and the total selectivity of cyclohexanone, cyclohexanol and cyclohexyl hydrogen peroxide.

该方法具有安全性，强化了热量的传递，可显著地提高环己烷氧化反应速度，提高环己酮、环己醇和环己基过氧化氢的总选择性。

In this thesis, we did modifications of alkyl groups upon benzyl fluorophosphonate. In order to study the influence of alkyl length and steric effect on activity and selectivity of probes, we synthesized benzyl fluorophosphonate recognition heads with modifications including ethyl, butyl, octyl and cyclohexyl. By way of connecting different kinds of tag like azido group, biotin and rhodamine with recognition heads separately through a higher hydrophilic ethylene glycol derived linker, a series of benzyl fluorophosphonate probes were made up. And they will apply to various biological testing strategies.

在本论文中，我们以苯甲基氟化磷酸酯为基础，於其上进行一系列烷基之修饰，为了探讨烷基长度与空间立体性质对於探针活性及选择性的影响，我们合成了包含乙烷基、丁烷基、辛烷基以及环己烷基修饰的苯甲基氟化磷酸酯辨识端，并藉由具较高亲水性的聚乙二醇衍生连接桥结合三种不同的发报端，分别有叠氮基团、生物素及萤光基团来构成不同的化学探针组合，这一系列苯甲基氟化磷酸酯类化学探针将可被应用於不同的生物测试策略。

The conversion of cyclopentadiene and selectivity for methylcyclopentadiene were around 32 % and 86 %, respectively, over KNO3/γ-Al2O3 and KNO3/HT at 450℃.

在所考察的催化剂中，KNO3/γ-Al2O3和KNO3/HT的催化性能最好，在450℃时就能催化转化约32％的CPD，MCPD的选择性可达86％左右，高于传统固体碱MgO在500℃时的活性。

The conversion of cyclopentadiene and selectivity for methylcyclopentadiene were around 32% and 86%, respectively, over KNO3/γ-Al2O3 and KNO3/HT at 450℃. Such catalytic activity was higher than that on MgO.

在所考察的催化剂中，KNO3/γ-Al2O3和KNO3/HT的催化性能最好，在450℃时就能催化转化约32%的CPD，MCPD的选择性可达86%左右，高于传统固体碱MgO在500℃时的活性。

To avoid the anticipated high reactivity of exposed α-methylenecyclopentanone, Mannich bases of cyclopentanone were proposed as a masked α-methylenecyclopentanone, in expectation of achieving selectivity between tumor and normal cells.

寻找简单的、易于合成的且选择性高、活性好的抗癌或抗炎有效的小分子化合物不仅是一项具有重要理论意义和潜在的应用价值，而且是一项富于挑战性的研究课题。

When acetone oxime was used as substrates, lower conversion and selectivity were obtained. For cyclopentanone oxime as the substrate, the Beckmann fragmentation was observed.

对于丙酮肟和环戊酮肟，前者重排得到N-甲基乙酰胺的选择性低，后者则不发生Beckmann重排。

Moreover, the proposed method has good selectivity as well. Most metal ions and protein et al. can be tolerated in considerable amounts. It has been applied to determine calcium in in the cytolymph of industrial microorganis with satisfactory results.

此外，该显色体系还具有良好的选择性，大多数常见金属离子、蛋白等活性成分均有较高的允许量，用于生物胞液中Ca2+的直接测定，结果令人满意。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。