放射性元素

其中以自然伽马测井确定湿灰分，该方法的前提条件是湿分主要是泥质且泥质不具放射性元素；

Of which , wet basis ash content is defined by gamma-ray log , and the precondition is the ash mainly argillaceous and contains no radioelement ;

自然伽玛测井（GammaRayLogging）利用伽玛辐射场，通过测量地层中天然放射性元素的自发衰变产生的伽玛射线来实现测井目的测井技术。

Gamma ray logging , which is based on gamma ray radiation field uses natural radioactivity of natural radioelement in stratum to accomplish the aim of logging .

放射性元素的衰变是真正一级反应最简单的实例。

The decomposition of a radioactive element is the simplest example of a true first order reaction .

在扫描癌灶时，医生将放射性元素附着在维他命B－l2上，然后将其注人病人体内。

For a cancer scan , a radioactive atom is attached to vitamin B-12 , which is then injected into the patient .

阐述了磷肥中有毒有害成分重金属镉（Cd）、放射性元素和三氯乙醛对土壤生态环境的影响，论述了施用磷肥对土壤和作物产品重金属含量的影响；

The impacts of the associated toxic constituents such as Cd , chloral and radioactive ele-ments on the soil environments and crop products are expounded .

U和Th是放射性元素，K、Fe、Mo、Mg和Zn是植物生长需要的必要营养元素。

U and Th are radioactive elements . K , Fe , Mo , Mg and Zn are nutritive elements which are necessary to plants growth .

人工污染的放射性元素90锶、137铯均在ALI值的1%以下。

The intakes of man made radionuclides , 90 Sr and 137 Cs were all below 1 % of ALI .

因此，采用新型材料对核废水中放射性元素包括Th、U、Eu的吸附分离，显得极为迫切和重要。

Therefore , the using of new materials on the adsorption and separation of radioactive of Th , U , Eu in nuclear waste water is extremely urgent and important .

利用月表天然放射性元素含量反演模型获取U、Th、K元素含量，绘制出这三种元素的全月含量分布图，并对元素含量反演结果的不确定性进行了初步分析。

Using the inversion model of absolute concentrations of natural radionuclides in lunar surface , the preliminary global distribution maps of Th , K and U are derived . The uncertainty of the inversion results is also analyzed .

元素周期表的第六行有许多放射性元素，包括钷、钋8、砹和氡9a。

The sixth row of the periodic table contains several radioactive elements , including promethium , polonium , 7 astatine , and radon .

不同岩性的岩石，其放射性元素U、Th和K的含量不同，即使是同一岩性的岩石，由于成因不同，形成年代不同，地质演化过程不同，其放射性元素含量也不同。

Different lithological rocks have different content of radio-elements such as uranium , thorium and potassium . Even if they are the same lithological rocks , as a result of different cases and age of formation , different geological evolvement process , their content of radio-elements also is different .

核电厂熔炉熔毁泄露放前所未有的大量的放射性元素进入海洋，铯134的踪迹显示在日本海岸线附近的水域该放射性物质的含量比科学家Buesseler和他的团队所发现的含量高出一千万倍。

The power plant meltdown released unprecedented amounts of radioactive elements into the ocean , with cesium 134 traces in waters off Japan 's coast tens of millions of times higher than what Buesseler and his team have found here .

中国黄土地区土壤中天然放射性元素的生物地球化学

Biogeochemistry of natural radioactive elements in soils of loess region in

锆石变生程度与放射性元素含量间的定量研究

Rationing Research on Contents of Radioelements and Metamict Degree of Zircons

对武汉市地面放射性元素分布的初步研究

A preliminary study of radioelements on the ground surface in Wuhan

本文主要从晶体矿物学的角度，讨论放射性元素在非产铀花岗岩中的存在形式，得出客观评价花岗岩放射性问题的结论。

The issue on granitic radioactivity is discussed in terms of mineralogy .

用量子隧道效应计算α放射性元素的半衰期

Calculating the Half - life of α Decay with Quantum Tunneling Effect

不知名的放射性元素他享有世界性的知名度。

The unknown radioactive element He enjoys a worldwide name .

居里夫妇也成功地分离出第二个放射性元素&钋。

The Curies had also succeeded in isolating a second rayshooting element-polonium .

含放射性元素的陶瓷产品和混合物的分散体

Dispersion , of ceramic products and mixtures containing radioactive elements

上海主要食品中微量放射性元素的含量

Contents of trace radioactive elements in main foods in Shanghai

应用地层放射性元素地球化学参数评价地层含铀远景

Geochemical parameters of radioelements applied to assess uranium prospects in geological formation

因为它的重，所以你想它应该是放射性元素。

Because it is heavy you expect it is radioactive .

放射性元素碳-14的半衰期为5730年。

Half-life of radioactive element carbon-14 is 5730 year .

除此之外，它们还含有放射性元素。

On top of that , they containradioactive elements .

印度洋海底钻孔样品中天然放射性元素的活化测定及其提供的古温度信息

Activation determination of natural radioactive elements in drill bore sediments of the Indian Ocean

利用伽玛能谱资料探索深部放射性元素分布的方法

A method for exploring the distribution of radioelements at depth using gamma-ray spectrometric data

放射性元素的衰变速度随元素种类的不同而不同。

The rate at which radioactive elements disintegrate varies from one element to another .

变质岩填图单位与放射性元素分布之间的关系

Relationship between mapping units of metamorphic rocks and the distributive characteristics of radioactive elements

镭和铀是放射性元素。

Radium and uranium are radioactive elements .