放射性同位素

Radioisotope per second to launch tens of thousands of alpha particles, each alpha particle in its within a very short trip can produce thousands of positively charged ions, that is, with the oxygen ions and a layer of intensive electronic clouds.

放射性同位素每秒钟要发射上万个α粒子，每个α粒子在其很短的行程内可产生上千个离子，即带正电的氧离子及一层密集的电子云层。

The CL characteristics and the ratio of ~ 232 Th/~ 238 U of zircons reveal that the former is formation age of amphibolite,and the later is its metamorphic age.

锆石CL图像和放射性同位素地球化学特征显示前者为岩浆结晶年龄，后者为构造-热事件年龄。

From analyzing the picture of autoradiograph of developing leaf,acceleration of leaf growth and development under elevated CO_2 was furthersupported.

利用~(14)C-蔗糖饲喂方法并结合放射自显影及放射性同位素检测技术对CO_2浓度升高影响叶片转运蔗糖方式和过程进行研究。

Measurements of S, O, and radiogenic isotope ratios are all potentially powerful tracers of magma interaction with country rocks and the importance of assimilation processes in the genesis of magmatic Ni-Cu-PGE deposits.

硫、氧同位素和放射性同位素比值在示踪岩浆与围岩的反应及在岩浆镍－铜－铂族元素矿床成因中同化过程的重要性方面有很大作用。

Measurements of S, O, and radiogenic isotope ratios are all potentially powerful tracers of magma interaction with country rocks and the importance of assimilation processes in the genesis of magmatic Ni-CuPGE deposits.

硫、氧同位素和放射性同位素比值在示踪岩浆与围岩的反应及在岩浆镍-铜-铂族元素矿床成因中同化过程的重要性方面有很大作用。

Radioisotope scan / gamma camera scan - this uses a very small amount of radioactive iodine.

放射性同位素扫描/γ相机扫描-这用途非常少量的放射性碘。

The study proved that uranium and thorium tend to detach from each other in hypergenesis while they are tightly paragenous in the endogenic process.

而这些稀有元素多含有放射性同位素，因此在对这种稀有多金属矿开采过程中的放射性污染问题也应该得到重视。

Periodic Table Ⅵ B family silver-white metallic luster of the solid metal transition element, atomic number Z = 74, atomic weight of 18385, chemical symbol W, there are five kinds of natural F stable isotopes, 18174W, 18274W, 18374W, 18474W, 18574W and eight kinds of radioisotopes .

周期表中ⅥB族银白色金属光泽的固体金属过渡元素，原子序数Z＝74，原子量18385，化学符号W，有五种自然F 稳定同位素，18174W、18274W、18374W、18474W、18574W和八种放射性同位素。

Lead has four stable isotopes: Lead 204, 206, 207, 208, but there are more than 20 kinds of radioisotopes.

铅在自然界中有4种稳定同位素：铅204、206、207、208，还有20多种放射性同位素。

Studies of Sr, Nd and Pb isotopes of various stratigraphic units, granite plutons and fluorite ores indicate that the metallogenic materials of fluorite were derived from multiple sources, and the isotopic composition of fluorite is characterized by crust_mantle mixed sources.

各地层单元、花岗岩体和萤石矿石的Sr、Nd、Pb同位素研究表明，萤石的放射性同位素组成具有壳、幔源混合的特点，成矿物质来源具有多源性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。