| 1. | Isotopic analysis of uranium by single - standard gas mass - spectrometer method
单标准气体质谱法铀同位素分析 |
| 2. | An isotopic analysis of the grains has made that fear come true
一项对这些颗粒的同位素分析让这种担心成真了。 |
| 3. | Standard practice for the ion exchange separation of uranium and plutonium prior to isotopic analysis
同位素分析前铀和钚离子交换分离的标准实施规程 |
| 4. | Standard test method for isotopic analysis of uranium hexafluoride by single - standard gas source mass spectrometer method
用标准气体源质谱法进行六氟化铀的同位分析的标准试验方法 |
| 5. | Standard test method for isotopic analysis of uranium hexafluoride by double - standard multi - collector gas mass spectrometer
用双支架多收集器气体质谱仪进行六氟化铀的同位素分析的标准试验方法 |
| 6. | Being a noble gas , it resists chemical bonding with other elements and is thus easy to purify for isotopic analysis
由于氙是惰性的，不易与其他元素产生化学键，因此很容易纯化以进行同位素分析。 |
| 7. | Standard test method for isotopic analysis of uranium hexafluoride by single - standard gas source multiple collector mass spectrometer method
用单支架气体源多收集器质谱仪法进行六氟化铀的同位素分析的标准试验方法 |
| 8. | Standard test method for isotopic analysis of hydrolyzed uranium hexafluoride and uranyl nitrate solutions by thermal ionization mass spectrometry
用热电离质谱法进行水解六氟化铀和硝酸双氧铀溶液同位素分析的标准试验方法 |
| 9. | Tree ring is a kind of natural archives , on which the isotopic analysis is important to study global climate and environmental change . the authors mainly provide a comprehensive introduction to the fractionation models of carbon , hydrogen and oxygen isotope in plants , their research techniques and the extract methods from cellulose . that results show isotopic tracer can record the message of climatic variation and has become a powerful tool for paleoclimate reconstruction and for the modern environment changing research . especially studying on pages , the cellulose isotopic analyses of imbedded old tree ring have become the mainly quantitative means of environmental evolvement . in addition , china is a typical monsoon country , research in tree ring stable isotope seasonal variation can give us a lot of important information on that . up to now , the research techniques and works on tree ring in our country are still in its earlier stage , and remain many limitations . it needs further accumulate basic research materials , intensify regional contrast and intercross studies on relative subjects
尤其是在过去全球变化pages研究中，埋藏古木纤维素中的碳氢氧同位素分析已成为环境演化研究的主要量化手段。另外，对于中国这样典型的季风气候国家，开展树轮稳定同位素随季节性变化的研究具有重要的意义。我国在树轮研究方面起步较晚，研究方法和研究内容上也比较简单，还存在不小差距，既要进一步积累基础资料，又要做区域对比，加强与相关学科的交叉研究。 |
