碱金属

In the alkali-boron-silicon system basic fluxing agent,we use the combined effects of alkali metals,alkali earth metals and admixture s to replace lead,in order to produce environment-protecting unleaded fluxing agent for overglaze colors with low bismuth.

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。

Parasitical thermal radiation loss is the main factor which greatly influences the thermal-to-electric converting efficiency of AMTEC.

引 言寄生热辐射损失是影响碱金属热电直接发电装置热电转换效率的主要因素之一。

In the second part (chapter 5) results of the K-promoted oxidation of GaAs (110) surface by photoemission are reported, the status and reaction of oxygen, the influence of alkali-metal coverage and oxygen exposure on adsorption kinetics are discussed.

第二部分是利用光电子能谱研究了K／GaAs（110）表面的催化氧化过程。目的是研究不同碱金属覆盖度对氧气在表面的吸附动力学的影响，不同氧气暴露量下氧的状态及氧化过程中涉及到的反应。

Unsaturated alkynyl alcohols, such as dehydronerolidol, dehydrogeranyllinalool, and dehydroisophytol, were prepared by ethynylation of turpentine derivatives, namely terpenylacetones, e. g. geranylacetone, farnesylacetone, and phyton under normal pressure in presence of alkali metal hydroxide and organic solvents.

松节油衍生物格萜烯基丙酮，如香叶基丙酮、金合欢基丙酮和植物酮在常压条件，碱金属氢氧化物和有机溶剂存在下可发生乙炔化反应，形成对应的α，β-不饱和炔醇化合物脱氢橙花叔醇、脱氢香叶基芳樟醇和脱氢异植物醇。

This investigation describes the one step preparation of potassium carbonate by electrolysis of potassium chloride solution in the electrolyzers with various kinds of Nafion membranes.

采用添加KHCO_3的阴极液循环法，由KCl水溶液的离子膜电解，一次得到K_2CO_3。试验中对Nafion膜的导电度进行了测定，探讨了碱金属阳离子在离子膜中的行为。

Prussian blue and its derivates have many excellent characteristics like electrochemistry reversibility, high stability, low cost and easy synthesis.

普鲁士蓝及其衍生物的三维网状结构在无机结构中是独特的，具有沸石特性，能在水溶液中很快地与碱金属离子发生交换。

The immediate product of the radioactive decay of an element.

一种碱金属属的放射性元素，是锕瓦解的产物。

Heavy and rare alkali-metals rubidium and cesium, possessing extremely high chemical properties and nearly perfect physical merits...

重稀碱金属铷和铯具有极高的化学活性和优异的光、电等物理特性，近年来在高科技领域里的应用日益拓展。

Heavy and rare alkali-metals rubidium and cesium, possessing extremely high chemical properties and nearly perfect physical merits of optics and electricity, have been finding more and more applications in the field of high technology in the last decades.

重稀碱金属铷和铯具有极高的化学活性和优异的光、电等物理特性，近年来在高科技领域里的应用日益拓展。

In recent years, salt-mixed solvent system has become a very important system. And with the development of studies on rare alkali metal rubidium and cesium, it is significant to study the rubidium / cesium salt-mixed solvent system.

近年来，盐—混合溶剂已构成了一类重要的体系，且随着对重稀碱金属铷、铯的了解，人们发现研究铷、铯盐—混合溶剂体系有着极其重要的意义。

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。