The catalytic gas liquid isotope exchange reaction is a good method to prepare tritiated triptolid.

采用催化气液交换法制备了氚化雷公藤,讨了反应时间和反应介质对反应产额影响。

There are 37 lectures, major headings are geochronology, radiogenic isotope geochemistry and stable isotope geochemistry.

这里有37讲，主要是地质年代学、放射性地球化学和稳定地球化学。

Tritium is one of the mildest radioactive isotopes.

氚是辐射最和缓放射性之一。

A series of tracer experiments using P32 as a tagger and the radioautography had been carried out.

应用P32放射性进行示踪试验和鱼体放射自显影,证实白鲫鱼种可以摄食和消化利用水绵。

The distribution and accumulation dynamic of 14CO32- in red common carp and hornwort was studied by using isotope-tracer technology.

本文采用示踪技术研了14CO32-在红鲤和金鱼藻中分布与积累动态。

Objective： To observe affinity and tumoricidal power of monoclonal antibody EQ75 to epidermal growth factor receptor on glioma cells.

目 观察标记抗表皮生长因子单克隆抗体EQ75对胶质瘤细胞亲和力及杀伤力。

High mass resolution spectrometer for isotope seperator on line(ISOL) in(Beijing) radioactive ion-beam facilities(BRIF) project requires mass resolving power of(20 000).

13串列加速器升级工程中在线分离器(ISOL)高质量分辨谱仪要求20000质量分辨率。

Geochron Laboratories was the first laboratory to provide high quality isotopic analyses to geological and archaeological communities on a comercial basis.

地质年代实验室是首家商务运作、可为地质学和考古学团体提供高质量分析实验室。

Through K-Ar isotope age study in pillow basalt,has gained the isochrone age is 139Ma.The age is the formation age of pillow basalt.

在枕状玄武岩中获得K-Ar（全岩）年龄为139Ma（测试单：宜昌地质矿产所室），因此确定其时代为晚侏罗世晚期。

Moreover, in each part of the River, these Gangdese-derived zircons show characteristic eHf(T) values that could be correlated to the neighboring batholithic values.

此外，在不河段中所淘选出冈底斯锆石皆显示了不铪特徵，表示沉积物物源比例主要受控于邻近区域岩体。

The researchers found that isotopes from the shock front were mixed into the protosun in a manner consistent with their origin in a supernova.

研人员发现，激波阵面中混合到原太阳中，混合方式跟起初在超新星中时候一致。

Breath tests using fatty acids with a stable isotope (13C) were carried out on patients with SSc in order to detect malabsorption and hypoperistalsis.

为检测肠道吸收异常和蠕动功能降低，我们对硬皮病患者使用稳定13C标记脂肪酸吸收呼吸试验，前瞻性地观察到了胃肠道受累过程。

Objective To test the possibility of evaluating early nerve regeneration by in vivo detection of the radioiodined-axoplasm, and compare this method with the electromyography examination.

目索示踪早期检测神经再生可行性,并与神经电图-肌电图检测结果进行比较，为临床应用奠定基础。

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、离子流强度积分方式,用多接收器热表面电离质谱计测量铀丰度。