实验结果表明含钽化合物是一类性能良好的场发射阴极材料。
It is shown that tantalum compounds are promising materials for field emitters.
许多物质已被用来作为阳性造影剂:银,铋,铯,钍,锡,锆,钽,钨和稀土化合物已被使用造影剂。
A number of substances have been used as positive contrast agents: silver, bismuth, caesium, thorium, tin, zirconium, tantalum, tungsten and lanthanide compounds have been used as contrast agents.
讨论钽、铌化合物的光谱干扰和非光谱干扰,分析产生干扰的原因,并阐述消除干扰的方。
The reason of producing interference has been discussed and the method of removing interference has been presented.
VB族元素钒、铌、钽的单茂金属化合物作为烯烃催化剂可得到分子量分布相当窄(1.05)的聚烯烃;
The half-metallocene of the elements V, Nb and Ta in VB group could be used in the polymerization of olefin to prepare polymer with rather narrow molecular weight distribution (1.05).
VB族元素钒、铌、钽的单茂金属化合物作为烯烃催化剂可得到分子量分布相当窄(1.05)的聚烯烃;
The half-metallocene of the elements V, Nb and Ta in VB group could be used in the polymerization of olefin to prepare polymer with rather narrow molecular weight distribution (1.05).
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