本文介绍了离子流强度累计测定同位素比的方法。
A method by cumulative intensity of ion current to analyse isotopic ratio is proposed in present paper.
一种检测甲烷是否是由生命制造的方法是同位素比测试。
One method to test whether life produced this methane is by measuring isotope ratios.
用同位素比质谱方法可在4或5天之内检测到阳性结果。
而且以MAT - CH_5质谱计测量氧同位素比时的本底校正作为例子。
Furthermore, the background correction during the oxygen isotope ratio measurement with MAT-CH5 mass spectrometer was chosen as an example.
如果火星上的甲烷是生命现象产生的，那么释放出的甲烷和水应该明显表现出氢和碳的同位素比。
Methane and water released on Mars should show distinctive ratios for isotopes of hydrogen and carbon if life was responsible for methane production.
本文介绍了用(232u)作示踪同位素，测定岩石、土壤、水体中铀同位素及岩石中钍同位素比活度的方法。
This paper presents a determination method of specific activity for uranium isotope in rocks, soil, water and thorium isotope in rocks using 232u as a tracer isotope.
当空气温度较高时，含有较重同位素氧-18的蒸汽比含有氧-16的蒸汽更容易凝结，并形成雪状的降水。
When the air was warm, vapor containing the heavier isotope, oxygen-18, condensed and formed precipitation, in the form of snow, more readily than did vapor containing oxygen-16.
他还说到，底线是“我们意识到的能够引起这么多同位素离散的过程是，月球上的氢含量比地球少10000到100000倍。”
The bottom line, he says, is that "the only process we are aware of that could cause such large isotope scatter is if the hydrogen content of the moon is 10,000 to 100,000 times less than [on] Earth.
研究人员利用所谓的离子显微镜来比较月球岩石中正常的氢元素含量及同位素氘的含量，元素氘比氢多带一个中子。
The researchers used what's called an ion microscope to compare the amount of normal hydrogen in the moon rocks to the amount of the hydrogen isotope deuterium, which carries an extra neutron.
碳同位素显示的格局，但它是较为困难的解释比氧同位素模式。
Carbon isotopes show a pattern, but it is somewhat more difficult to interpret than the oxygen isotope pattern.
所以，目前锂同位素的含量应该比标准模式预测的少。
So, there should be less of this isotope around than the Standard Model predicts.
微量元素和同位素地球比学资料表明黄椅山玄武岩的地幔源区的同位素组成与原始地幔近似；
All of the rare element and isotope characteristics of the Huangyishan basalts are similar to that of the original mantle of the Earth.
采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。
The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence.
发现17f的反应总截面比其邻近同位素的反应总截面稍有增强。
It was found that the reaction cross section of 17f has a little enhancement compared with that of its neighbor isotopes.
“也就是说，”比林斯说道，“这只鹅能够把任何放射性同位素转变成稳定的同位素，它产生了一套完整的放射性疾病防御系统。”
"What it amounts to, " said Billings, "is that The Goose can convert any radioactive isotope into a stable one. It has developed the perfect defense against radiation sickness.
假如如此，尘烬里就会包含诸多种类的比锂重的元素的同位素。
If so, the grains would contain a wide variety of isotopes from elements heavier than lithium.
烃源岩热解气碳同位素分析结果表明，随成熟度增大，乙烷碳同位素随之变重，只是受影响的程度比甲烷小。
Hydrocarbon source rocks by carbon isotope analysis results showed that with the increase of carbon isotope, ethane maturity turns heavy, just smaller influenced than methane.
应用严格的热力学模型研究了氢同位素低温精馏塔在不同进料扰动、回流比扰动以及馏出量扰动情况下的动态响应情况。
The study of different processes and operations in dynamic behavior of a column has been done in detail using a rigorous thermodynamic model.
应用严格的热力学模型研究了氢同位素低温精馏塔在不同进料扰动、回流比扰动以及馏出量扰动情况下的动态响应情况。
The study of different processes and operations in dynamic behavior of a column has been done in detail using a rigorous thermodynamic model.
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