查询词典 impurity

But the author found that there was another impurity in VK_1 and its amount was even larger than menadione in some samples of VK_1 and its amount will obviously increase when exposed to light.

在对维生素K_1的有关物质检查中发现，维生素K_1样品中除杂质甲萘醌外，还有一主要的未知杂质，且在光照的条件下，其量会明显增加。

The solvent extraction of trace silicon as an impurity from sodium molybdate solution with isoamyl alcohol was studied.

对钼酸钠溶液中的微量杂质硅的萃取分离进行了研究。

On the basis of many times of experiments, the interference of alkaline insoluble matters and silicon impurities on the determination of monatomic silicon was discussed, and the method for the removal of main impurity component in industrial silicon was proposed.

分析了样品中的碱不溶物及硅质杂质对单质硅测定的干扰，提出了排除工业硅中主要杂质成分游离二氧化硅干扰的测定方法。

The picture of the lattice vibration mode for one-dimensional monatomic chain induced by an interstitial impurity is studied mainly.

主要研究了一维单原子链中间隙式杂质引起的晶格振动图像，分析了杂质质量和恢复力系数对振动模的影响。

She saw in him that ancient motionlessness of a race that can't be disillusioned any more, an extreme , perhaps, of impurity that is pure.

她从他身上，看出了一种再不迷于幻景的人类的古老的滞息情态，一种极端的不纯洁，而这不纯洁到了极端，也许说是纯洁的。

TheN we subject the semicoNductor to impurity dopiNg, which turNs it iNto either a p-type or aN N-type semicoNductor .

然后我们使半导体经过渗杂，以将其转变成p型或n型半导体。

These impurity gases such as not to be removed, the lamp will be released during use to reduce the internal pressure until the neon lamp to start it up.

这些杂质气体如不被清除掉，就会在灯管的使用过程中释放出来，降低霓虹灯内部的气压直至灯管启动不起来。

After each time roll changing, must inspect the lubricant whether to harden the nigrescence, whether by impurity pollution, whether to oxidize the emulsification.

每次换辊后要检查润滑脂是否硬化变黑，是否被杂质污染，是否氧化乳化。

The condensation reaction,in which the yield of intermediate product after refining process was more than 90%,used iso-butylaldehyde and formaldehyde as materials,Et 3N as catalyst.The hydrogenation,in which the conversion of hydroxypivaldehyde and selectivity of NPG were respectively 99% and 95%,used Cu-ZnO as catalyst,and ethanol as solute,meanwhile in the hydrogenation,the impurity in material could also ...

缩合反应采用异丁醛和甲醛为原料，三乙胺为催化剂，在 60℃左右反应，缩合产物经减压蒸馏和结晶、干燥，得到收率为 90 %以上的中间体羟基戊醛；加氢反应采用自制的Cu -ZnO催化剂，乙醇为溶剂，在 15 0℃将HPA加氢生成新戊二醇，HPA转化率为 99%，新戊二醇收率在 95 %以上，而且HPA缩合反应的副产物在加氢反应中也转化为新戊二醇。

The on-state resistance is lowered by 24％ because of the higher impurity concentration of the SOI surface.

采用这种方法制得的SOI LDMOS的纵向击穿电压提高了43％，导通电阻降低了24％，这是因为它的表面浓度更高。

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％。