查询词典 optically denser medium

The reliability of ages from optically stimulated luminescence dating of boring core has a stringent dependence on characteristic of samples, and on motheds of boring and sampling.

钻孔岩心测年样品具有较一般地质样品更为复杂的影响因素，样品特征对年龄可靠性有非常重要的影响，且主要受钻进方法和采样过程的制约。

Optically active ethyl-3-hydroxybutyrate,a useful chiral synthon,was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent.

利用面包酵母在非水相中不对称还原乙酰乙酸乙酯，制备了光学活性的手性化合物S-3-羟基丁酸乙酯。

The process parameters, such as the ratio of starting materials and the reaction time, were optimized. Thus, the optically pure ethambutol was obtained in 81.25% yield under the optimum reaction conditions.

对以-2-氨基丁醇和1，2-二氯乙烷为反应原料，合成产物乙胺丁醇的工艺路线进行了探讨，对不同的投料比，反应时间等工艺参数进行了优化，收率为81.25%。

Combining the electro-optically cavity-dumped technology with MOPA system could realize the laser output with nanosecond pulse width, gigawatt peak power and nearly diffraction limited beam quality.

通过将电光腔倒空技术和MOPA结构放大器系统相结合可以实现ns级脉宽、GW级峰值功率以及近衍射极限的高光束质量激光输出。

The lack of any diastereoselectivity for the formation ofβ-hydroxyketones with optically active sulfinyl analogue of NAD~+ model supports the radical mechanism proposed previously.

并将手性的亚砜类辅酶NAD~+模型物用于反应，没有得到立体选择性产物，验证了先前提出的自由基机理。

Possible surface carburization may be detected optically in spheroidized materials by observation of surface pearlite or an increased number of carbide spheroids.

通过观察球光体表面或碳化物的增加的数目在球化处理材料方面，在视力上发现可能的表面渗碳。

Resolution of racemates into enantiomers is an important way of obtaining optically pure chemical compounds.

拆分是获得光学活性化学物质的重要手段。

In recent years, optically active polymers have attracted much attention because of their unique functions such as molecular recognition, optical resolution for racemates and catalytic activity in asymmetric transformations as well.

近年来，光学活性聚合物的合成与结构—性能研究深受国内外学者的高度关注，这是由于这些合成材料具有潜在的应用前景，如：光学活性聚合物可应用于外消旋混合物的对映异构体分离，即光学拆分过程；不对称吸附、手性诱导及许多有机化学反应过程中的不对称催化。

The three-arm interferometer includes three waveguides each exhibiting a linearly increasing path length optically connected to a 1x3 coupler and a 3x3 coupler.

所述三臂干涉仪包括与1×3耦合器和3×3耦合器光连接的三根波导，每根波导的路径长度呈线性增加。

A six-rayed starlike figure optically produced in some crystal structures by reflected or transmitted light.

次总苞，小总苞次级花被，如处于复合伞形花序中一个伞形花序基部之花被

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。