isotope
['aisətəup]
n.同位素
例句与用法:
An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of2.014.
氘氢的一种同位素,在其原子核内有一个质子和一个中子,其原子重量为2。014
A radioactive, inert, gaseous isotope of radon, with a half-life of 3.92 seconds.
锕射气氡的一种放射性的,惰性的和气态的同位素,其半衰期为3.92秒
A radioactive isotope of carbon, especially carbon 14.
放射性碳碳的一种放射性同位素,尤指碳14。
词形变化:
形容词: isotopic | 副词: isotopically |
n.
【物】同位素
isotope['aisəutəup]n.1.■【化学、物理学】2.■同位素3.■核素
isotopeisotope[ˈaisəutəup]n.1.■【化、物】同位素
继承用法isotope-activatedadj.1.■被同位素激活了的isotope-isomericadj.1.■同位素异构的isotope-isomerismn.1.■同位素异构(现象)
[ˈʌɪsətəʊp]
noun
- (Chemistry)each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element
(化)同位素
isotopic
adjective
isotopically
adverb
isotopy
noun
语源
- 1913: coined by F. Soddy, from iso- 'equal' + Greek topos 'place' (because the isotopes occupy the same place in the periodic table of elements)
isotope
名词 isotope:
one of two or more atoms with the same atomic number but with different numbers of neutrons
isotope
■The experiments at CERN use the isotope sodium 22 as their source of positrons.
CERN的实验以同位素钠22为正子源。
■The PET scan identified focal areas of high uptake of isotope in 11 of the 12 cases of focal disease.
PET扫描确定了12例病灶疾病中的11例有同位素高吸收的病灶部位。
■IS ~(40)Ca_(20) A STABLE ISOTOPE?
~(40)Ca_(20)是否稳定?
■An hour later the next lighter stable isotope, xenon 134, appeared.
一小时之后,略轻一点的稳定同位素氙134出现。
■The experiment involved irregular ion movement theory and isotope theory.
两国的人民白天黑夜都能听到间歇的炮击声。
■China Isotope and Radiation Association (CIRA) was founded in April 1989.It is a non-profit economic-social organization.
中国同位素与辐射行业协会是1989年4月成立的全国性社会团体法人组织。
■Dynamic model for Pb isotope evolution in the continental crust of China.
中国大陆地壳铅同位素演化的动力学模型。
■In order to differentiate between isotope, a new system of symbol writing had to be developed.
为了区分同位素,不得不制定新的符号书写体系。
■Any radioactive isotope introduced into the body to study metabolism or other biological processes.
为了研究新陈代谢或其他生物学过程而引入身体的放射性同位素。
■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同位素13C标记的脂肪酸吸收呼吸试验,前瞻性地观察到了胃肠道的受累过程。
■Provides isotope data for almost all known nuclides. From Berkeley Laboratory.
为每个元素提供尽可能的同位素相关数据。
■Today, most cyclotrons are used either for instructional purpose or for isotope production.
今天大多数回旋加速器是用在教学上,或者用于同位素生产。
■An on-line analysis and measurement system of percentage of water and gas cont ents in petroleum by using radiation isotope is described.
介绍了利用射线辐射衰减方法实现的原油含水率、含气率在线分析与计量系统。
■Two ways of automatic melting steel surface checking and measuring are introduced: eddying flow and isotope,as well as their application in Tang Steel.
介绍了涡流法和同位素法2种结晶器钢水液面自动控制检测方式,及其在唐钢板坯连铸机的应用。
■Isotope ratios of Pb contained in wares were measured using Time-Of-Flight Secondary Ion Mass Spectrometry(TOF-SIMS)without any references.
介绍了用飞行时间二次离子质谱法对器物中的铅同位素比值的测量。
■The method of determining Ni, Cu and Pbi n urine with isotope dilution mass spectrometry(IDMS)is described.
介绍了采用同位素稀释质谱法(IDMS)测定冻干人尿样品中镍、铜、铅的含量。
■The authors propose an E 2 elimination mechanism in which the cinchona alkaloid acts as a chiral base in consistency with measured isotope effects.
作者提出了电子二是淘汰机制金鸡生物碱手基地作为衡量符合同位素效应.
■The results suggest that carbon isotope is very useful for Early Proterozoic carbonate strata correlation.
作者认为,碳同位素对于早元古代碳酸盐地层的对比是很有用的。
■An obvious restraint in the use of isotope ratios results from the need to employ mass spectrometers.
使用同位素比值法有着一个明显的局限因素,就是要用质谱仪进行分析。
■For example, by GIS thematic map and overlaying analysis every factor is visualized to administer to sample design of isotope investigation.
例如,通过制作gis专题图并进行叠加分析,可视化地展示各类因素的影响,辅助了同位素研究的布样设计。
■It is about 7000 million years old measured by isotope geological method.
假如该坑与上述三个陨石坑是同一系列的外来天体撞击地球事件。
■Title: Hydrogen and oxygen isotope geochemistry of high to ultrahigh pressure metamorphic rocks from Southeast Dabie.
关键词:大别山;超高压;变质岩;氢同位素;氧同位素;水-岩相互作用
■Title: Dynamic model for Pb isotope evolution in the continental crust of China.
关键词:铅同位素;动力学演化;中国大陆;上地壳;下地壳;地幔
■Its methane carbon isotope is heavier than -40‰ , ethane carbon isotope is heavier than -28‰ .
其甲烷碳同位素值均大于-40‰,乙烷碳同位素值大于-28‰。
■The isotope analytic technique of the agrochemical remainder is increasingly valued by people, and has made a substantial development.
农药的同位素残留分析技术日益受到人们的重视,并取得了长足的发展。
■Using 14C isotope trace and SDS-PAGE etc techniques research remobilization of carbon assimilate and compensative effects, and the relation of water and quality.
利用~(14)C同位素示踪和SDS-PAGE等技术对不同水分亏缺下碳同化物再动员与补偿效应、及水分与品质的关系做了初步探讨。
■On the basis of the method, the optimization of the fringing magneticfield for a large-scale electromagnetic isotope separator is finished.
利用上述方法完成了一台大型电磁同位素分离器边缘磁场的优化。
■Statistical analysis with SPSS10.0.ResultsEffect of anti - Fas Ab on the activity of ERK by isotope:The activity of ERK increases to the peak at 30min of anti - FasAb treatment.
利用同位素法检测ERK酶活性结果显示:抗Fs抗体孵育后,ERK活性明显升高,30min达高峰。
■The application value of traditional method to explore the oil and gas source using carbon isotope was bounded by the type and maturity of source rock.
利用气体碳同位素探索油气来源的传统方法由于受源岩类型、源岩成熟度等因素的影响,其实际应用受到很大的限制。
■Measurement of kinetic isotope effects indicated that the rate-limiting step of these reactions is the C(sp 2 )-H bond cleavage.
动力学同位素效应测量表明限速步骤,这些反应是在C(藻2)-八键裂解.
■The result of isotope in the inclusion show the ( D value is high, so the filled matter formed under the hot-bittern surroundings.
包裹体同位素分析结果显示溶蚀孔、缝充填物的(D值较高,形成于氘富集的热卤水环境。
■Changes of nuclear mass and nuclear size cause isotope shifts.
原子核质量和大小的不同引起同位素移动。
■Oil of Wutonggou and Pingdiquan formation came from Pingdiquan group source rock of Permain by biomarker and carbon isotope correlateion.
原油碳同位素和生物标志化合物对比表明二叠系储层的稠油来自凹陷二叠系平地泉组源岩。
■In addition, carbon and nitrogen isotope and its ratio was important indicator in the riverine biogeochemistry study.
另外碳氮同位素及其比值在当前的河流有机质生物地球化学研究中仍起着非常重要的示踪作用。
■Only a lighter atomic nuclei fusion can occur, such as the hydrogen isotope deuterium and tritium, and so on.
只有较轻的原子核才能发生核聚变,比如氢的同位素氘、氚等。
■Isotope: One of two or more species of atoms of a chemical element having nuclei with the same number of protons But different numbers of neutrons.
同位素:一种化学元素的两个或多个类型,它们的原子核具有相同的质子数,而中子数却不同。
■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 isotope ratio is directly used for comparing oils or gases.
同位素比率直接用于比较各种石油或天然气。
■At present,the methods of isotope tracer and turbine flowmeter are universally used for testing annulus well in home oilfield.
同位素示踪法和涡轮流量计法是目前国内各油田普遍采用的环空测井方法。
■The isotope 212Bi decays through both alpha and beta processes that have similar time-scales for this nucleus.
同位素铀衰变通过阿尔法和贝塔过程中,类似的时间尺度这一核心.
■It would take many months of follow-up work in shore-based laboratories, including critical isotope geochronological work, to confirm our findings.
回到岸上的实验室后,还需要好几个月进行后续的研究工作以确认我们的发现,其中包括必备的同位素定年工作。
■For in ordinary uranium there is much more of the U238 isotope than there is U235 and, as you know, U238 will not undergo fission easily.
因为在普通铀中,铀238同位素要比铀235多得多,而且正如你所知,铀238不易裂变。
■We know this because the ice in the comets contains twice as many atoms of deuterium (a heavy isotope of hydrogen) to each atom of ordinary hydrogen as we find in seawater.
因为我们知道彗星上冰的氛原子(氢的一种重同位素)与氢原子(现代海水中常见的氢原子)的比值是海水的两倍。
■So if supersymmetry is true, there should be less of this isotope around than the Standard Model predicts.
因此,如果对超对称性确信无疑,那么宇宙空间中元素同位素的存在就会比标准模式预测的要少。
■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)同位素年龄为139Ma(测试单位:宜昌地质矿产所同位素室),因此确定其时代为晚侏罗世晚期。
■A Archaeozoic granulite with an isotope age(Sm-Nd isochoron) of 3450 Ma,was found firstly in Proterozoic Dakendaban Group in eastern north margin of Qaidam Basin.
在柴达木盆地北缘东段,首次从古元古代达肯大坂岩群中发现太古宙麻粒岩,并取得3450Ma Sm-Nd等时线同位素年龄。
■More than two tons of this plutonium isotope were generated within the Oklo deposit.
在欧克陆矿床中,有超过两公吨的钸同位素形成。
■And in oxygenic isotope 1st phase, cause of the postglacial period transgression, most of them is the semi-saltwater environment of estuary area.
在氧同位素1期,发生冰后期海侵,多为入海河口区的半咸水环境。
■In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.
地质学家在石笋上钻孔,使用铀衰变成钍的同位素的方法确定它们的年龄。
■Various indoor or outdoor equipments are available for conducting field studies in the field of hydrogeology/hydrology including environmental isotope analysis.
多种室内/室外仪器设备资源可用于包括同位素分析的多项水文/水文地质的野外现场研究。