rare earth

A new tetrakis( p glycylglycinephenyl)porphin and its rare earth (Yb,Sm) complexes were synthesized.They have been characterized by elemental analysis,UV vis,IR, 1HNMR and laser Raman spectra.

首次合成了一种新型（甘氨酰甘氨酸）苯基卟吩及其稀土镱、钐配合物。用元素分析、红外光谱、紫外可见光谱、核磁共振和激光拉曼光谱等方法进行了表征。

This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

离子交换剂在萃取色谱中到了广泛应用，本文详细总结了离子交换剂在分析化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等分离与测定。

The results show that rare earth elements can efficiently improve the structures of the Chromvanadizing layer, the rate of growth and properties of diffusion layer.

结果表明，稀土元素能有效地改共渗层结构，提高共渗层生长速度和性能。

Rare earth metals, such as metallic neodymium and metallic didymium (metallic praseodymium-neodymium), are used for rare earth magnets, mainly neodymium-iron-boron magnet.

稀土金属，如金属钕和金属皮（金属镨，钕） ，用于稀土磁铁，主要钕铁硼磁铁。

It will lay a good foundation for studying the mechanism of the interaction of anti-oxidases with rare earth ions.

这可为研究稀土离子与植物体保护酶作用机理打下坚实基础。

Rare earth can influence for shape size,distribution and quantity of niobium carbonide,decrease activity of carbon and niobium i...

稀土碳化铌形态、大小、分布、数量有影响,可降低碳、铌活度,阻碍碳化铌在奥氏体区析出。