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1)  valence state
价态
1.
A Study of Chromium Valence States and Their Distribution Characters in Soil of Huangpu Port;
广东省黄埔港土壤中铬的价态分析研究
2.
The inorganic As of different valence states in surface waters can be determined when atomic fluorescence is adopted through hydride, and it is high sensitivity, good precision and suitable to analyze the arsenic of different valence state of large amount of surface water sampling.
陆地水中溶解态砷的含量通常在以下,常以砷(三价)、砷(五价)两种价态形式存在,其化合物均有毒性,三价化合物比五价化合物毒性强,多以砷酸盐状态存在。
3.
Through the test on the element valence state and absorption spectrum of some samples with XPS and ultraviolet visible complementary filter,it is found that the color of orange yellow after Fe ion is implanted is caused by d-track level splitting,and the color of blue after Ti ion is implanted is to be caused by the charge .
改变后期的不同热处理条件,获得了橙黄色和蓝色蓝宝石,通过XPS、紫外可见分光光度计对部分样品的元素价态、吸收谱进行了测试发现:Fe离子注入呈现橙黄色,是d轨道能级分裂所致;单独注入Ti离子呈现蓝色,认为是色心或金属与非金属之间电荷转移所致。
2)  valence [英]['veiləns]  [美]['veləns]
价态
1.
The application and calculation of the valence covalent radius and the electronegativity of the new valences in the transition elements(Ⅳ);
过渡元素价态共价半径及其新价态电负性的计算和应用(Ⅳ)
2.
Valences of rare earth ions in long afterglow phosphors;
Eu,Dy共掺杂长余辉发光材料中稀土离子价态的研究
3.
The Toxicity of Different Valence Chromium And Effect on Human Body;
不同价态铬的毒性及其对人体影响
3)  core and valence states
芯态与价态
1.
The division of iron s core and valence states under high pressures via first-principles calculation;
Fe在高压下第一性原理计算的芯态与价态划分
4)  ecological evaluation
生态评价
1.
A Study of the Landscape ecological evaluation in Longmen County,Guangdong Province;
景观生态评价研究——以广东省龙门县为例
2.
Research on ecological evaluation method in environment impact evaluation of hydropower project;
水电工程环境影响评价中生态评价方法研究
3.
Ecological evaluation on typical wetlands in Jilin Province;
吉林省典型湿地生态评价
5)  ecological value
生态价值
1.
Researches on ecological value and protection of ecological environment of Qinghai Lake;
青海湖生态价值与生态环境保护研究
2.
Profit and loss analysis on ecological value in upper reaches of Tarim River under land use changes;
塔里木河上游土地利用变化中的生态价值损益分析
3.
Application of ecological value evaluation method in environmental assessment of hydropower development;
生态价值评估方法在水电开发环境评价中的应用研究
6)  ecological appraisal
生态评价
1.
Based on the judgment of the phases of industrialization and the characteristics of industrial structure of Shandong Province, according to the relationship among economic benefit, environmental capacity and resources support, the paper set up the model of ecological appraisal of industrial structure.
产业结构的生态评价和循环经济模式构建是实施区域可持续发展的重要途径。
补充资料:混合价态
分子式:
CAS号:

性质: 又称价态起伏(valence fluctuation)。指在一些化合物中,金属离子的价态的不稳定性或组态间的波动。在一些稀土化合物体系中,例如硫化钐等,4fn与4fn-1d组态间的能量差很小,在一定的温度或压力下,电子可以在上述电子组态间迁移,电子迁移的时间小于10-11s,因而当利用穆斯保尔谱研究上述化合物时,只能观察到不同价态的平均效果。但由于光电子能谱的时间常数远小于电子的迁移时间,因而在光电子能谱中可以看到不同价态的分布状况。人们曾对稀土硫化物体系的价态波动进行了系统地研究。大多数稀土一硫化物具有金属性,表明稀土离子具有+3价,金属性来源于电子充填到离域的5d轨道构成的能带中。钐、铕和镱的一硫化物在常压下是绝缘体,磁性研究表明这些稀土离子的电子组态为f6,f7和f8。但在压力下,由于价态波动,这些化合物发生由绝缘体向金属的转变。

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