Specific mRNA sequences can be enriched for by preparing the RNA from subcellular fractions.
从亚细胞部分制备RNA,可使专一的mRNA序列的丰度提高.
The abundance and availability of water and nutrients in a soil ecosystem determine its fertility.
土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力.
There is an argument to express them in ground level abundance of the respective elements.
有理由把它们用相应元素的地平丰度来表示.
Petrographically and mineralogically similar rocks quite often have different concentrations of radioactive elements.
岩石学矿物学上类似的岩石,其放射性元素丰度却往往有所不同.
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.
The fundamental parameters and iron abundances of these sample stars are determined.
确定了这些样本星的恒星大气参数,得到了这些巨星的铁丰度,并且讨论了铁丰度与恒星大气参数的相关性.
Theage - metallicity relation AMR provides useful clues about the Galactic formation and evolution.
年龄--金属丰度关系给出了银河系形成和演化的线索.
Tarim's Hade thin - sand reservoir which is named margin reservoir is a double - layer , super - deep, super - thin , super - low - abundance reservoir.
塔里木哈得薄砂层油藏 双层 、 超深 、 超薄 、 储量丰度特低,被评价为边际油藏.
Therefore, the article creates 11 optimum qualitative indices determining presence of ore magmatic rock bodies.
据此, 笔者以成矿元素丰度为依据,首创了岩体成矿指数等11种成矿性判别的最佳定性指标.
Under 0.1 ~10 isotope ratio range and 95 % confidence, the relative expanded uncertainty of the technique %.
最后得出在铀同位素丰度比为0.1～10的范围内95%的置信水平下, 该方法的相对扩展不确定度为0.10%.
After calibrated by Uranium isotope ratio reference materials, the accuracy and precision are improved.
使用铀同位素标准物质校正质谱计,方法测量铀同位素丰度比的准确度和精密度明显提高.
After the comparison between abundance and density, on the top list are Zhoushan, Jiaxing and Huzhou.
密度与丰度相比, 位次上升最明显的是舟山 、 嘉兴、湖州.
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 assessment of source rocks usually depends on the type, abundance, and maturation organic matter.
以往评价烃源岩的标准一般是分析其类型 、 丰度 、 分布范围及演化程度并在此基础上计算生烃强度.
By correction of isotopic standards , the absolute measurement method of MC - ICPMS was established.
通过实验, 建立了MC-ICPMS的同位素丰度绝对测量方法.