查询词典 isotopic

As material,the absorption mechanism of~(32)P was studied,with isotopic tracer technique.

以温州蜜柑为试验材料，应用同位素示踪技术对磷的吸收机理进行了研究。

Heavy water is also used in research as an isotopic tracer for chemical reactions and biochemical pathways.

在实验研究中，可用作化学过程和生物化学过程的同位素示踪剂。

The isotopic ratio is incorporated as the tooth grows, leaving a record over time similar to tree rings.

同位素的比例随着牙齿的生长融入其中并随着时间的流逝留下记录，类似于树木的年轮）。

It is important to avoid the use of uranium compounds of unspecified isotopic composition.

要避免使用那种非专用的同位素成份的铀化合物。

U-Pb isotopic system of uraninite gives a mineralization age of 407 Ma ±, this is similar to the whole-rock isochron age of Rb-Sr.

通过铀铅同位素体系研究发现，矿化年龄在407Ma左右，与Rb-Sr全岩等时线年龄接近。

The GEOTOP centre develops multi-disciplinary projects such as the study of uranium-thorium-radon desequilibrium in volcanology or the study of isotopic tracers at the water-sediment interface and internal process of the earth.

此中心开展了多学科的研究项目，如火山学中铀-钍-氡消除平衡的作用研究、水沉积物分界面的同位素示踪剂研究，以及地球内部作用的研究。

The naturally occurring stable carbon and nitrogen isotopes were used as tracers to study the influence of different ecological factors on the two isotopic compositions in different weever tissues under the control conditions in the metabolic process, and the stable isotope fractionation in weever tissues in metabolic process was used to study the flow pathway of nutrient and energy for food web in the ecological system.

利用天然存在的碳氮稳定同位素作为示踪剂，研究了在受控条件下驯养的鲈鱼的新陈代谢过程中不同生态因子(水温、摄食水平、体重等)对鲈鱼体内不同组织的碳氮稳定同位素组成的影响。通过鲈鱼新陈代谢过程中的稳定同位素分馏作用，研究了在生态系统食物网中的物质与能量转换规律。

The geochemistry and isotopic characteristics of the three xenolith groups vary systematically from group to group.

对各种深源岩石捕掳体的地球化学和Sr-Nd同位素组成分析表明，总体上，麻粒岩类捕掳体呈现富集特点，从二辉麻粒岩到长英质麻粒岩的系统变化指示了壳幔混合作用的存在。

Study on the petrochmical,trace element chemical,REE geochemical and Pb isotopic geochemical characteristics of the Tongshan intrusive indicates that the quartz diorite,granodiorite and adamellite are products of three stages of the same periodfrom only one magmatic source.

通过岩石化学、微量元素地球化学、稀土元素地球化学、铅同位素地球化学特征研究表明，铜山石英闪长岩、花岗闪长岩、二长花岗岩是同一岩浆源同一时期三个侵入阶段的产物，铜山岩体幔壳同熔型的复式岩体，属太平洋钙碱性岩石系列。

Therefore, lake sediments have recorded eutrophication process of Lake Dianchi from oligotrophic lake to eutrophic lake. Especially in the past several decades, both autochthonous and allochthonous organic matter display rapid increasing. Combined with isotopic data, a conclusion is drawn that Lake Dianchi has entered into a hypereutrophic stage.

因此，湖泊沉积物记录了滇池从一个贫营养的湖泊演变成富营养化湖泊的过程，特别是最近几十年，滇池内源有机物和陆源有机物的输入都呈现快速增长的趋势，结合同位素组成特征表明滇池进入了重富营养化阶段。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。