- abundance ratio ratio 丰度
- The abundance ratio of D/H reaches 30% from 0.1%, and more than 90% from 10%. D浓度为0.;1%25的样品经装置浓缩后得到D浓度为30%25的产品;贫化部分D浓度小于10?5;
- Eight equations computed isotopic abundance and two equations computed isotopic abundance ratio have been given. 给出八个计算丰度公式和两个计算同位素比公式。
- The isotopic abundance ratio and content are determined with isotopic mass-spectrometry. 文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量。
- By this method the magnitude of isotope shift, isotope abundance ratio, Lorentz width and Doppler width of the spectral profile can be deduced. 由此可获得同位素效应的光谱线位移量、同位素的丰度比及其光谱线的洛仑兹宽度与多普勒宽度。
- Therefore, even the ratio of the abundance ratio of the two essential standards reaches 5,the relative derivation of results determined by the two methods as mentioned above is much less than 0.01%. 这样，即使在2个基本标准的丰度比的比值达到5的条件下，2种方法的标定结果的相对偏差远小于0.;01%25。
- The determination and confirmation were made by means of selected monitoring ions(SM) mode,SIM(m/z) were 231,233,288 amu( abundance ratio was 100:14:11),using external standard method. 特丁磷选择监测离子为(m/z231、233、288),其丰度比约为100:14:11。
- Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration, and a thermal surface ionization mass sepctrometry equipped with multicollector has been used. 采用全蒸发技术、离子流强度积分的方式，用多接收器热表面电离质谱计测量铀同位素丰度。
- Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration,and a thermal surface ionization mass sepctrometry equipped with multicollector has been used. 采用全蒸发技术、离子流强度积分的方式,用多接收器热表面电离质谱计测量铀同位素丰度。
- Note 3: Actinide abundance ratios may be applied to measurements of stellar ages. 注3:锕充足比率可用于测量恒星的年龄.
- Note3: Actinide abundance ratios may be applied to measurements of stellar ages. 注3:锕充足比率可用于测量恒星的年龄.
- The melamine product ion abundance ratios must match that of an external standard within 20% relative. 三聚氰胺子离子的丰度比必须在（外加）标准品子离子丰度比的20%25以内。
- Surprisingly for astronomers and nuclear physicists, the abundance ratios of thorium to other heavy elements are very similar to ratios found for Milky Way stars. 出乎意料的天文学家和核物理学家丰比率钍等重元素非常相似比率发现银河系恒星.
- The measurement method of the isotopic abundance ratios for the nanogram samarium was performed by Finnigan MAT 262-RPQ thermal ionization mass sepctrometer. 本文简介了使用Finnigan MAT 262热电离质谱仪对超微量钐天然同位素丰度比的精密测定。
- It can be used to determine accurately the abundant ratio in the uranium sample.It is an absolute measurement method based on gravimetry. 它可用于准确测定铀样品中的丰度比,这是一种基于重量法的绝对测量方法。
- There was an abundance of corn last year. 去年玉米丰收。
- She had an abundance of very black hair. 她有一头浓密的深黑色头发。
- An array or abundance of gimmicks. 巧妙装置一系列的或大量的别致玩意儿
- There were deer in abundance in these forests. 这些森林中有许多鹿。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。