选择性

The astaxanthin-hyperproducing mutants of oceanic red yeast were efficiently screened with β-ionone.

用β-紫罗兰酮作为筛选剂选择性分离海洋红酵母虾青素高产突变菌株。

Selective breeding gave rise to a mutated iridescence gene which lead to spread iridescence.

选择性的繁殖让变种的虹光基因增加，导致虹光色的扩散。

The effect of microwave irradiation on these selectivities is discussed.

讨论了微波对有机化学反应选择性的影响。

It increases the spectral usage efficiency, and at the same time, it can reduce ISI greatly.

OFDM适用于多径环境和频率选择性衰落信道中的高速数据传输。

But in practice, many wireless communications experience frequency-selective fading, which will cause severe ISI.

不过，在实际的通信过程中一般要经历频率选择性衰落，会引起严重的符号间干扰。

The influence of α-Sb_2O_4 content on selective oxidation of isobutane was evaluated.

探讨了催化剂中助剂α- Sb2 O4含量对异丁烷选择性催化氧化的影响。

The catalyst on calcination temperature of 400℃ had the highest conversion of isobutylene and the catalyst on calcination temperature of 500℃ had the highest selectivity of methacrolein .

焙烧温度为400℃的催化剂异丁烯的转化率最高，焙烧温度为500℃的催化剂甲基丙烯醛的选择性最高。

The molybdenum-based multiphasic oxide catalysts were prepared and tested in the selective oxidation of isobutylene to methacrolein reaction.

研究了添加不同助剂对钼基复合氧化物催化剂对异丁烯选择性氧化制备甲基丙烯醛反应的影响。

An appropriate and short reaction time is the key to obtain high yield of the targets and low selectivity of the trans-trans isomer.

适当短的反应时间是获得高的主产物收率和低的反-反异构体选择性的关键。

The result shows that this catalyst has a high catalytic activity and a good selectivity to isomerization of longifolene.

结果表明，该催化剂对长叶烯的异构化反应有很高的催化活性和较好的选择性。

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％。