查询词典 praseodymium

In North China, price of praseodymium neodymium oxide, a major RE variety rose 50%; that of cerium oxide grew 40%; and that of lanthanum oxide, 27%. In South China, price of dysprosium oxide rose 65%; that of terbium oxide, 69%; and that of europium oxide, 12%.

其中北方稀土主要品种氧化镨钕上涨 50%，氧化铈上涨40%，氧化镧上涨27%；南方主要品种涨幅更大，氧化镝上涨65%，氧化铽上涨69%，氧化铕上涨12%。

The effects of larium salt, cerium salt and praseodymium salt on thermal stability of PVC were studied, the synergistic effects of rare earth stabilizers with PDOP,β- diketone and ESO were also investigated by heat aging test, witheness test, conductivity test and TG analysis.

通过热老化测试、白度测试、电导率测试和热重分析，研究了镧、铈、镨盐对PVC热稳定性能的影响，同时考察了辅助热稳定剂亚磷酸酯、β-二酮和环氧大豆油与稀土类稳定剂的协同效应。

Porous nanometer Ce-M-O solid solutions were synthesized by a microwave- induced combustion process using cerium nitrate hexahydrate, lanthanum nitrate hexahydrate, praseodymium nitrate hexahydrate and urea as raw materials.

使用Ce(NO3)3·6H2O， Pr(NO3)3·6H2O， La(NO3)3·6H2O，尿素为原料，利用微波引诱燃烧法合成了多孔纳米Ce-M-O固溶体。

Methods Effects of yttrium chloride and praseodymium chloride on human lymphocytes cultured in vitro were studied by micronucleus test.

用微核试验法研究了氯化钇和氯化镨对体外培养的人淋巴细胞微核率的影响。

A yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium .

一种稀土属黄色多价元素，与铈、镧、镨共生于独居石和氟碳锑矿中。

Ago a kind of misconception that the rare earth metals is very scarce in nature, in fact not the case, many of which elements such as lanthanum, cerium, praseodymium, neodymium and samarium in accordance with their distribution in nature is no less well-known people in some of the elements of industry, common There ore monazite, scandium yttrium stone, silicon and cerium stone, stone and brown curtains and other fluorocarbon calcium cerium ore.

以前有种错误概念，认为稀土金属在自然界很稀少，其实不然，其中很多元素如镧、铈、镨、钕和钐按其在自然界的分布不次于人们在工业上熟知的某些元素，常见的矿石有独居石、钪钇石、硅铈石、褐帘石和氟碳钙铈矿等。

The recent progresses in the study on the fluorescence of rare earth complexes and application for the determination of the rare earth elements and organic compounds, as fluorescent probes for bioactive materials analysis and as detection means in separation technology were reviewed in detail. In chapter two, the absorption spectra of the 4f electron transitions of the complexes of the neodymium, praseodymium, holmium and erbium with fleroxacin in the presence of CPC have been studies by normal and derivative spectrophotometry.

本文以稀土元素配位化学为基础，以导数吸收光谱技术和荧光光谱技术为研究手段，利用新一代喹诺酮类抗菌药物，抗凝血类杀鼠药物的化学结构特点和大环化合物冠醚与金属离子突出的配位能力，以分析应用为目标，系统研究了这些化合物同稀土元素形成的配合物的光吸收和荧光特性，通过对体系实验条件的优化，使体系的稳定性、选择性和灵敏度得到显著改善。

And the valence of praseodymium and the chromatic mechanism of the pigments were investigated.

该固溶体中未发现+4价的Pr，而主要是以+3价的形式存在于Pr-CeO2固溶体中。

In addition, some praseodymium compounds are used to impart a yellow color to glasses and enamels.

广泛应用于各类电子器件和马达上；用于石油催化裂化。

This preparation overcome the association of rare earth in the materials and result in formation of the praseodymium triisooctanyl oxide/PS with high praseodymium content and high transparence, their fluorescence and heat capability were improved obviously.

它们的荧光强度有明显的提高，溶解性能、红外谱图及动态机械热分析证实了材料中存在镨与苯环中π电子的强配位作用导致材料形成交联网络结构。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。