同位素

In this paper, method of quantity calculation of mixed|source natural gas is established based on composition and carbon isotopes of methane and ethane.

利用天然气中甲烷和乙烷的组成及碳同位素值，建立了不同来源天然气混合的定量计算方法。

Two most popular spectrophotometric approaches for the measurement of purified El activity are the strategies based on reaction with ferricyanide and 2,6-dichlorophenolindophenol (2,6-DCPIP).

同位素标记法是采用动态的测量，没有分光光度法便利，同时它还用到一种相对不稳定的放射性物质，易造成环境污染。

The isotope of uranium with mass number235,fissionable with slow neutron s.

锕铀铀的同位素，原子质量数为235，与慢中子发生裂变

A highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons.

钚的一种极易裂变的同位素，用于核武器或作反应堆燃料，用慢电子辐照铀获得。

We have extracted DNA from the inclusion of a dinosaur egg fossil from the Late Cretaceous in Xixia Henan,China, DNA fragments are isolated from the floccus in the cavity of the egg fossil,and confirmed by the method of random primer isotope labelling.

本文从河南省西峡晚白垩世的一枚保存方式特殊的恐龙蛋化石中提取DNA，经过￣32P同位素标记和电泳分析，发现在蛋内腔的絮状物样品中确有DNA片段存在。

Man-made radionuclide of Cesium-137 can be as environment tracer to research the sediments on river floodplain s.

人工同位素137Cs可以作为环境示踪因子研究河漫滩沉积物。

In order to study the source of ore-forming materials and genesis of fluorite deposit, Sr isotopic composition was studied.

为了研究成矿物质来源及矿床成因，对该矿床进行了Sr同位素研究。

After the proofreading of time effect of the carbon and oxygen stable isotopic of carbonate cementation in Permian rudite of the footwall of Kebai-fault, its composition character is researched.

对克百断裂下盘二叠系砂砾岩中碳酸盐胶结物的氧、碳稳定同位素的年代效应进行较正，对其组成特征进行研究。

East Asian winter monsoon ; late Pliocene ; isotope ; foraminifer ; South China Sea

东亚冬季风；上新世晚期；同位素；有孔虫；南海

Paleoecological responses to midPleistocene climate transition at about 900 ka in the south China sea were mainly reflected by highfrequency fluctuations in planktonic foraminifer, isotopic, and other biologicalenvironmental records that indicated a sudden decrease in sea surface temperature.

中更新世气候转型在南海浮游有孔虫、氧同位素和其它生物记录上主要反映在900 ka BP前后发生高频率变化，特别是指示表层水骤然降温。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。