The radium isotopes are absorbed to an appreciable extent through the human and animal gut.
镭的同位素通过人和动物的肠子时有很大部分被吸收。

Application of Stable Isotope Tracing Method in Research of Skin Penetration Absorption of Chinese Drugs
稳定同位素示踪方法在中药透皮吸收制剂研究中的应用

Abstract The isotope fractionation effect is primary factor affecting accuracy of hydrogen isotope analysis.
摘要同位素分馏效应是影响氢同位素准确分析的主要因素。

isotopic abundance.
放射性丰度

abundance of isotopes.
同位素的丰度

low abundance isotope
低丰度同位素

isotopic abundance ratio.
同位素丰度比

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。

Measurement of isotopic abundance and age of plutonium material in a sealed container
密封容器中钚材料同位素丰度和年龄的测量

This instrument can be used for gas analysis and determine of isotopic abundance of light elements.
此仪器可用于气体分析以及轻元素的同位素丰度测定。

The relative abundance of different nuclear isotopes in the material could reveal additional clues.
物质中不同核同位素的相对丰度能够提供更多的线索。

Abundant Concentration of Lead on the Sample of Bronze drum in Viet Nam and Survey for Lead isotopic
越南铜鼓样品铅的富集与铅同位素测定

The isotope fractionation effect is primary factor affecting accuracy of hydrogen isotope analysis.
同位素分馏效应是影响氢同位素准确分析的主要因素。

The proposed method is more accurate than the qualitative investigation such as isotopic tracer.
该方法较同位素及综合示踪法定性分析更为精确。

Accurate Determination of Trace Amount of Cadmium in Rice for International Key Comparison by Isotope Dilution Thermal Ionization Mass Spectrometry
准确测定国际关键比对大米粉中痕量镉

Application and Achievement of Radioisotopes in Nuclear Medicine
放射性同位素在核医学中的应用与成就

Study on the Acoustic Spectrum Characteristics of isotonic and isometric Contraction of Muscle under Load
在负荷状态下肌肉等长、等张收缩声谱特征的研究

activating isotope.
活化同位素

active isotonic movement
主动等张运动

by contrast, the comprehensive evidence and oxygen isotope temperature may be close to the actual temperature.
而综合证据与氧同位素则可能比较接近实际气温。

Major Elements and Sr Isotopes of the Dissolved Loads in the Yangtze River Estuary and its Adjacent Areas
长江口及邻近海域水体主元素和锶同位素地球化学

Adrenal radioisotope scan
肾上腺放射性同位素扫描

Adsorption Study of Hydrogen Isotopes on Metal Palladium Surface by Quantum Mechanism Computation
金属钯表面吸附氢同位素的量子力学计算

Carbon isotope was bascally not related to its thermal maturity, but was affected by its origin.
随成熟度的增加，深层烃源岩干酪根碳同位素略微变重。

The age of emplacement is at Upper Paleozoic Era from the result of isotopic age determination.
依据同位素测年结果, 确定其侵位时代为晚古生代晚期。