查询词典 isotopes

Oxygen isotopes in particular are shifted toward lower values as the result of interaction between the hydrothermal fluids and carbonate rocks.

特别是氧同位素转变为对之间的互动和热液碳酸盐岩导致更低的数值。

By comparing the carbon and oxygen isotope records of stalagmite P001 and flowstone P007 with the modern rainfall amount,it can be seen that the oxygen isotopes reflects the strength of precipitation or monsoon in annual to decadal time scale.

通过P001石笋和P007流石的碳、氧同位素记录与现代降雨记录的比较可知，在年际至10年际尺度上，氧同位素反映的为降水或者季风的强弱。

Otolith is calcareous concretions in fish inner earsIts composition and structure are very stableIts accretional growth follows a circadian rhythm that is physiologically controlled and influenced by environmental conditionsOtolith acts as biological archives providing the basis for the reconstruction of individual life traits and environmental parametersThe paper focuses on fish otolith trace elements and their isotopes, general testing methods and the prospect and problems of its application in environmental detection in recent 20 years, hoping that it could provide researchers with some thoughts and could expand its potential application in environmental science.

鱼耳石是鱼类内耳中的钙质沉积体，组成和结构非常稳定，它的生长轮受其生理控制和环境条件影响有规律地昼夜生长。耳石可作为鱼类的生物学记录者并为重建其生活特征和环境参数提供依据。文中就近20年来国内外关于鱼耳石微量元素和同位素方面的研究热点、鱼耳石元素研究中常用的测试分析方法以及其在环境监测中的应用前景和存在的问题作一整理和综述，望能为广大耳石研究者提供一些思路和揭示其在环境科学中的广阔应用前景。

The progresses of tracing ore-forming fluids in different kinds of ore deposits using rare gas isotopes are summarized, and some problems and the developing tendency about this method are also discussed.

归纳了近年来用稀有气体同位素来示踪成矿流体的研究进展，概括了其在不同类型矿床中的应用现状，并指出当前该方法存在的问题及发展趋势。

It's between two isotopes of hydrogen, two kinds of hydrogen, deuterium, which is heavy hydrogen, which you can get from seawater, and tritium which is super-heavy hydrogen.

这两种氢，其一为氘，它是重氢，可由海水获得；而氚是超重的氢。

But in the 1950s the first sophisticated mass spectrometers were developed, capable of measuring isotopes in small samples.

但是上世纪50年代发展出的精细质谱仪能够测定少量样品中的同位素。

The Canadian nuclear reactor at Chalk river, Ontario, is the largest single supplier of isotopes in the world.

加拿大核反应堆位于安大略省乔克河畔，是世界上最大的也是唯一的同位素供应源。

The available results found that atmospheric p CO2 variations reconstructed according to boron isotopes of marine foraminifers agree well with the records from Vostok ice cores.

现有的研究证实利用海洋浮游有孔虫硼同位素重建的大气CO2浓度变化与Vostok冰芯记录的大气CO2浓度变化吻合地很好。

Succeful seismic testing for Flowserve valves The multiple radiation waste remediation projects in, which the valves will be utilised, will eure that nuclear waste can be safely stored while the isotopes decay and eventually become harmle.

福斯流体控制有限公司福斯阀门成功用于地震测试那些大量用于放射性废物补救设备中的阀门，可以确保核废料安全的储存在同位素中，减弱核辐射并最终变的无害。

In the northeast part of the South China Sea the high salinity water comes from the Philippine Sea, therefore, biologic productivity was high and there was rich organic matter in sediments during the periods of oxygen-isotopes 2, 4 and 6. In these periods the sedimentation rate was very high, so there were very good material conditions for formation of gas hydrate. In addition, from the end of Miocene to present, the Philippine Sea plate collided with Asian plate in Taiwan area, extruding the northeast part of the South China Sea along northwest direction. The extruding force made fluid in the sediments very active, and this is very good for the formation of gas hydrate.

南海冻北部，在氧同位素2、4、6期，由于菲律宾海的高盐度海水的注入，使这里的生物生产率特别高，陆坡上沉积了丰富的有机物质，加上此期间该处的沉积速率高，为天然气水合物的生成提供了物质条件；另外，自中新世末以来，由于菲律宾海板块与欧亚板块在台湾地区发生碰撞，对南海北部产生北西向挤压，加快了流体在沉积物中的活动，为天然气水合物的生成提供了良好的构造环境。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。