| 1. | It is important to avoid the use of uranium compounds of unspecified isotopic composition .
要避免使用那种非专用的同位素成份的铀化合物。 |
| 2. | How could such a change in isotopic composition have come about
同位素的组成有这样的变化，究竟是如何发生的？ |
| 3. | Method for the analysis of the organic matters for stable carbon isotopic composition
有机质稳定碳同位素组成分析方法 |
| 4. | Study on the sulfur isotopic compositions of lead - zinc deposits in northwestern guizhou province
黔西北地区铅锌矿硫同位素特征研究 |
| 5. | Determination of the noble gas isotopic composition in rocks and minerals by mass spectrometry
岩矿样品中稀有气体同位素组成的质谱分析 |
| 6. | Determination of uranium and plutonium content and isotopic composition ; mass spectrometric method
铀.钚及同位素成分的测定.质谱测定法 |
| 7. | Standard test method for determination of plutonium isotopic composition by gamma - ray spectrometry
用射线光谱法测定钚同位素成分的标准试验方法 |
| 8. | Sedimentary - metamorphic boron deposits and their boron isotopic compositions in eastern liaoning province
辽东地区沉积变质硼矿床及硼同位素研究 |
| 9. | Thermolysis production of lake carbonatite organic matter and its carbon isotopic composition characteristic
湖相碳酸盐岩有机质热演化产物及其碳同位素组成特征 |
| 10. | Standard test method for determination of uranium content and isotopic composition by isotope dilution mass spectrometry
用同位素稀释质谱法测定铀含量和同位素成分的标准试验方法 |
