isotope

isotope

1. 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。

2. 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。

3. IS ~(40)Ca_(20) A STABLE ISOTOPE?

~(40)Ca_(20)是否稳定?

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 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。

10. 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。

11. 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。

12. 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。

13. 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。

14. 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。

15. 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。

16. 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。

17. 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.

18. 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。

19. 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。

20. 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。

21. 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。

22. 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

23. 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

24. 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‰。

25. 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。

26. 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。

27. 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。

28. 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。

29. 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。

30. 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.

31. 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。

32. 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。

33. 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。

34. 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。

35. 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。

36. 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。

37. 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。

38. 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。

39. 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。

40. 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.

41. 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。

42. 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。

43. 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。

44. 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。

45. 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。

46. 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。

47. 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。

48. 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。

49. 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。

50. 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。

51. The atmospheric helium isotope ratio: Is it changing?

大气氦同位素比率在变化吗?

52. There are differences between natural and adulterated juices in stable isotope ratio.

天然果汁与掺假果汁之间在稳定同位素比率方面存在着差异。

53. They prefer sulfur 32, the element's lightest isotope, to heavier sulfur 34 when given the choice.

如果能选择的话，这些细菌喜欢摄取硫32（硫最轻的同位素），它们比较不喜欢较重的硫34。

54. Its most common form, or isotope, has 146 neutrons.

它最常见的形式或者同位素有146个中子。

55. The authors present carbon isotope data of organic matter in Co-rich ferromanganese crust from central Pacific seamount area.

富钴结壳组成与生长环境之间的关系研究对这种未来资源的准确评价和合理利用有重要意义。

56. Secondly, the Os concentration and residence time in seawater, and Os isotope composition of seawater were precisely measured.

对海水中锇的浓度、滞留时间 ,以及现代海水的锇同位素组成进行了精确测定 ;

57. Thermal cycling absorption process(TCAP),a semi-continuous hydrogen isotope separation process,is of many unique advantages.

对热循环吸附法(TCAP)全回流模式和生产模式下的氕-氘分离实验进行了研究。

58. A radioactive isotope of thorium with mass number228.

射钍钍的放射性同位，质量数为

59. The excretion of the isotope in urine and faeces mainly occurred on the first day, and was 7.7% and 68.2% respectively of the administered dose.

尿和粪中排出的放射性主要集中在给药后的第1天,分别为给药量的7.7%和68.2%。

60. A unit of radioactivity, equal to the amount of a radioactive isotope that decays at the rate of3.7?010 disintegrations per second.

居里放射性强度单位，相当于一秒钟内发生3。7?010次裂变

61. Making use of isotope to research the essential of QDBS,which develope a new approach for TCM syndrome.

应用同位素显像研究气虚血瘀证的本质特征，为影像辨证学开辟了一条新途径。

62. To determine the content of Chloramphenicol(CAP) in honey using stable isotope dilution technique.

建立稳定同位素稀释技术测定蜂蜜中氯霉素(CAP)分析方法。

63. Simmons: Get me a sample and some isotope readings.

弄些样本和同位素读数。

64. Isotope shifts and hyperfine structure spectrum[J].

引用该论文 马洪良.

65. When the commonest isotope of iron (56Fe) absorbs a neutron, the result is not radioactive.

当最普通的铁（56Fe）的同位素吸收了一个中子，生成物无放射性。

66. According to the characteristics of trace elements and isotope, the source of the basalt is similar to the OIB source.

微量元素和同位素特征显示,玄武岩起源于与洋岛玄武岩源区相似的富集地幔源。

67. German researchers recently uncovered an isotope of iron known as iron-60 in ocean bed samples laid down about two million years ago.

德国研究人员最近在大约于200万年前沉入海底的样本中发现了一种铁的同位素--铁60。

68. We do this by measuring the distribution of time of decay -- "death" -- of individual atoms in a sample of the isotope.

我们可以办到这一点，方法是测量该同位素一个样品的各个原子衰减的时间分布（“死亡”）。

69. We can talk about the half-life of a radioactive isotope, and indeed we can measure and state very very precisely what that half-life is.

我们可以谈论放射性同位素的半衰期，我们确实可以非常准确地测量和描述半衰期是什么。

70. Tell-tale isotope signatures of what we eat and drink are found throughout our bodies in bones, fingernails and hair.

我们吃吃喝喝中留下了同位素签名的证据在我们的骨骼、手指甲及毛发中被发现。

71. So,there should be less of this isotope around than the Standard Model predicts.

所以，目前锂同位素的含量应该比标准模式预测的少。

72. The selection of the desired species(element, isotope, and charge state)is certified by the signature of the entire mass spectrum.

所需物质（元素、同位素及电荷态）的选择，被全部质谱的信号特征所证实。

73. According to the clear geologic relation and information related about the isotope, the Neozoic volcanic activity can be divided into 10 stages.

据野外清晰的地质关系,结合同位素年龄资料,研究区内新生代火山活动可分为10期火山喷发。

74. MTT method was used to detect the influence of PDGF-BB on the proliferation of fibroblasts and compared to the routine isotope method.

探讨血小板衍生生长因子(PDGF)促进慢性、难愈合伤口的愈合速度的机理。

75. 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。

76. The results of groundwater isotope analysis show that the groundwater in the Yinchuan Plain has different recharge patterns.

摘要地下水同位素特征表明银川平原地下水具有不同的补给模式。

77. The desorbed methane carbon isotope of coal core samples collected from Jincheng area, South Qinshui basin was measured.

摘要对取自沁水盆地南部晋城地区的煤芯样中的解吸气进行了甲烷碳同位素测定。

78. A densimeter with radioactive isotope beseemed experiment teaching for speciality of nuclear engineering and nuclear technology in higher education is presented.

摘要提出了一种适合于施工程与核技术专业本科生实验教学的放射性同位素密度计。

79. The composition of oxygen isotope is a good tool to trace the origin and formation environment of sulfate.

摘要氧同位素组成是一个非常有效的示踪硫酸盐的起源和形成环境的工具。

80. Fractionation effect of coalbed gas is a phenomenon that gas composition and isotope change during the process of migration.

摘要煤层气的分馏效应是指运移过程中气体组份和同位素值发生变化的现象。