查询词典 isotope

A synthetic element produced in trace quantities by helium isotope bombardment of curium.

一种合成元素，由氦同位素轰击锔可得到微量的这种元素。

The morphology, occurrence and components of dawsonite were described, and the paragenetic sequence of sandstone and origin of CO2 forming dawsonite were investigated by polarization microscope, scanning electron microscope, Xray diffraction and MAT251 stable isotope mass spectrometer.

利用偏光显微镜、扫描电镜、X射线衍射分析仪和MAT251稳定同位素质谱仪，详细描述了片钠铝石的形貌、产状和成分，确定了含片钠铝石砂岩的成岩共生序列和形成片钠铝石的CO2的成因。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

Alloy membrane is used to separating hydrogen isotope,but after operating tritium,decay product 3He resorts in alloy membrane,forms helium bubble s and affects the macroscopical properties of alloy membrane.

PdY8.5Ru0.19合金是用于氢同位素分离的膜材料，但涉氚操作后，衰变3He会滞留在合金膜中并形成氦泡，影响其宏观性能。

Bone morphogenetic protein ; cell differentiation ; cell dedifferentiation ; isotope incorporation

骨形态发生蛋白；细胞分化；细胞反分化；同位素掺入

The composition of gas and its isotope sampled from water, reservoir and hydrocarbon bearing inclusion can be used to research the solution and degasification process during geological time.

分析油气田水中的溶解气、气藏气以及含烃流体包裹体的化学组成及碳同位素组成，有助于重建地史时期天然气的水溶、脱溶过程。

Through the analyses of condition, the geologic background and the hydrochemistry and the isotope of the carbon and helium of the typical hot springs in the southwest of China, the general rules of the CO2 degasification points in the southwest of china are explored and the CO2 degasification is calculated on the whole.According to the results of wa...

通过对中国西南地区典型温泉的地质背景、环境条件、水化学及碳、氮稳定同位素的分析，探讨了中国西南地区深大断裂出露温泉CO2释放的一般规律，并进行了初步的释放量计算。

It has a great deal of CO2 degasification points. The supply diversification of the hot springs to water on the Rehai geothermal area causes the major difference in water chemistry here. Some come from diagensis of magma and exogenous water. The isotope ratio of helium is high.

对于温泉水的补给来源：虽然西南地区各温泉水补给主要是大气降水，同时也不排除存在少量的岩浆岩、变质岩的成岩作用水，及火山岩冷却分异的同生作用水。

The input of light isotope enriched terrestrial carbon causes atmospheric δ^13C to drop by about 0.3‰ at deglaciation,followed by a rapid rise towards a high interglacial value in response to oceanic warming and regrowth on land.

在间冰期，劳伦和芬诺斯堪的亚冰盖融化的大量融溶水注入北大西洋，这种融溶水持续以大约0.1 Sv有规律的释放，已对位于北大西洋大洋传输带循环的"Achmes Heel"构成了威胁。

ABP. Sedimentation rate is very low on the whole core and shows three apparent variations at three phases:① A comparatively high SR during marine isotope stage 3 (MIS3) and LGM, about 7.3 and 14cm/ka respectively;② A very low SR of 1.5cm/ka during the last deglaciation, which is different from the deeper Okinawa Trough with higher SR during the last deglaciation than the last glaciation;③ A negligible sediment accumulation since 6.4 cal.

DOC-42孔沉积速率整体较低，呈明显的阶段性变化：在氧同位素3期和LGM期间沉积速率相对较大，分别为7.3和14cm/ka；末次冰消期以来的沉积速率则显著降低，与冲绳海槽冰后期沉积速率高于末次冰期明显不同；自约6.4 cal。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。