碱金属

Three N-pivot lariat ethers with picrylamino group as side arms have been prepared, and the selective coloration of above chromogenic ethers for alkalic metal salts and amines have been studied conveniently by UV-Vis spectra.

设计合成了三个具有分子隙缝的、以苦胺基为侧臂的N-支套索冠醚，利用其生色基和UV-Vis吸收光谱，简便地研究了冠环大小、键连基团对碱金属盐和有机胺选择变色作用的影响。

The effect of alkaline metal oxides and fluorides on the performances of green leadless fluxing agents for overglaze colors were studied by means of orthogonal experiments.

应用正交试验法，研究了碱金属氧化物及氟化物对环保型无铅釉上彩熔剂性能的影响。

Based on alkali- boron- silicon system, a compound function of several alkali metals, alkaline- earth metals and admixtures is used to replace that of lead to develop environment- friendly, leadless flux for overglaze colors with low bismuth content.

在碱-硼-硅系统基础熔剂中引入外加剂，通过多种碱金属、碱土金属及外加剂等复合效应来代替铅在熔剂中的作用进而研制低铋环保型无铅熔剂。

Rb and Cs were always exist together with lithium in nature, especially in lithia mica Recently,the rare alkali metals Rb and Cs as well as their compounds have found wide application in new energy and new materials,especially in the field of catalytic performance to the formation of organic and inorganic compounds.

近年来，稀碱金属铷、铯及其化合物在新能源、新材料中的应用受到广泛重视，在无机及有机配合物催化性能方面的研究日益增多。

Trace elements ratio of Ba/Rb (1235) and variation of alkali metals might indicate the metasomatism of fluids.

微量元素比值Ba/Rb(12~35)和碱金属的变化暗示源区可能遭受过流体的交代作用，源岩可能是富集的二辉橄榄岩。

This approach avoided the long duration at high temperatures in traditional methods and unstable precursors in metathesis reactions.

这种合成方法不需要单质反应的高温及长时间处理，也避免金属氯化物与碱金属硫化物或硒化物之间的交换反应中不稳定的前驱物。

A process for preparing the olefine sulfide includes addition reaction between sulfur monochloride and C3-C12 olefine under existance of low-carbon alcohol as catalyst to obtain addition compound, mixing it with C1-C15 haloalkane, sulfide of alkali metal, sulfur powder, and aqueous solution of emtrol, sulfurizing, dechlorinating, and refining.

一种硫化烯烃的制备方法，包括：(1)使一氯化硫和C 3 ～C 12 烯烃在低碳醇催化剂的存在下进行加合反应，生成加合物；(2)将(1)步的加合物与C 1 ～C 15 卤代烷、碱金属硫化物、硫磺粉、脂肪醇水溶液混合，进行硫化脱氯反应后，精制处理，得到硫化烯烃产品。

In addition,the one complex containing benzoaza-15-crown-5 pendant has a relatively higher catalytic activity over another one containing morpholine,which may be due to the preponderant effect of hydrophobic environment of the former.

Schiff碱类金属配合物除在氢化反应、环氧化反应、聚合反应、仿生催化氧化等方面得到广泛的应用外[5]，近两年来，我们发现Schiff碱金属配合物也能有效地促进酯的水解或剪切4

Doping Cr into perfect TiO2 (110) surface can create the new active surface state different from that of oxygen defect surface ,AM and transition metals deposited TiO2 (110) surface. Its active surface state is the Cr 3d occupied state near EF and the value of band-gap drop from 3.13eV to 1.16eV, so photocatalysis reaction can perform in visual light area after doping Cr into perfect TiO2 (110) surface.

TiO_2(110)面掺杂Cr 可以产生不同于氧缺陷、碱金属及过渡金属负载的新表面态，其表面态为靠近E_F 的Cr3d 电子占据能带，带隙由原来的3.13ev 降至1.16eV，因此，掺Cr 后TiO_2 可在可见光区发生光催化作用。

Polymer-alkali salt complex ; Humidity sensor ; RC oscillatory circuit.

高分子-碱金属盐配合物；湿度传感器；振荡电路

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。