查询词典 thorium

Their discovery marks the first abundance determination of the actinides element thorium in a star beyond the Milky Way, and follows the detection of thorium in more than ten stars within the Milky Way.

他们发现，标志着首丰测定的锕系元素钍星以外的银河系，跟检测钍十余恒星的银河系。

Either of two decay products of thorium ,meso thorium I,an isotope of radium,or meso thorium II,an isotope of actinium.

新钍钍的两种放射性生成物之一，即新钍1号，它是镭的同位素，或新钍2号，它是锕的同位素

I was struck by the fact that the activity of uranium and thorium compounds appears to be an atomic property of the element uranium and of the element thorium .

我突然意识到，铀化合物和针化合物的这些活性似乎是元素铀和元素钍的原子属性。

By comparison recoveries of several sequential extraction procedures and selectivity of extractants for thorium in soil and scoria, Martínez-Aguirre's sequential extraction method was adopted for quantitative analysis of thorium fractions, then the optimization and evaluation of the sequential extraction method were performed.

分别采用Tessier、BCR和Martínez-Aguirre形态萃取方法对土壤和样品中钍的形态进行分析，通过对总量的回收率和萃取剂选择性比较，选择了Martínez-Aguirre连续萃取法定量样品中钍的形态，并对其进行了优化和评价。

Much scoria, waste water and powder contained thorium were produced in the processes of floatation and smelting of these minerals with abundant radiothorium in rare earth industries of Baotou, China, and thorium contaminations to soil and food chain are becoming an increasing incritically environmental concern in Baotou area.

我国包头稀土工业在稀土矿浮选和稀土精矿湿法冶炼过程中产生了大量含放射性钍的废渣、废水和粉尘，对当地生态环境造成严重的破坏和放射性污染。

A radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite.

一种放射性矿物，由硅酸钍组成，是钍的来源，见于粗糙的花岗岩中。

Their discovery marks the first abundance determination of the actinide s element thorium in a star beyond the Milky Way, and follows the detection of thorium in more than ten stars within the Milky Way.

他们发现，标志着首丰测定的锕系元素钍星以外的银河系，跟检测钍十余恒星的银河系。你知道它的英文吗？

By potted plant experiments, the uptakes of thorium and the effects of thorium fractions in rhizosphere soil by wheat in the different growth period were observed.

通过盆栽实验，考察了小麦对根际土壤中钍形态分布以及的在不同生长期对钍的吸收影响。

The stability of the emulsion liquid membrane and the factors affecting the enrichment efficiency of thorium such as temperature,thorium concentration,pH value of outer phase and Rew,Roi etc,have been studied.

研究了乳状液膜的稳定性、温度、钍的浓度、外相pH值、乳水比、油内比等因素对富集钍的影响。

The decrease of the flux shown by the arrow indicates the absorption of light by thorium ions at the surface of the star; i.e., the stronger feature means a higher abundance of thorium.

下降的通量显示箭头表明对光的吸收钍离子表面该星；即较强的特点，手段更高丰富的钍。

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。