isotopic造句
31. According to isotopic geochronology, intrusion of Yunmengshan plutons happened in Middle Yanshanian.
32. Eight equations computed isotopic abundance and two equations computed isotopic abundance ratio have been given.
33. According to the isotopic dating, it was emplaced into the active continental margin in Permian, which was resulted from the eastward subduction of the Tethys sea.
34. This paper has summarized some advances, existing problems and developing tendency on the geochemical research by integrated application of noble gas isotopes and other isotopic methods.
35. With the noble gas isotopic data of mantle xenoliths from eastern China, the main advance are summarized in this paper.
36. It is important to avoid the use of uranium compounds of unspecified isotopic composition.
37. Carbon isotopic value of methane from similitude kerogen is lighter than that from total rock in the presence of element sulfur.
38. And the hydrogen and oxygen isotopic compositions heavy waters are calculated by the high - resolution mass spectrometer.
39. Because experimental condition and analytic technique have been improved, "double spike" isotopic dating method of lead isotope and analyses calc.
40. Recovering deuterium from uranium deuteride bed by means of the isotopic exchange reaction between the solid and gas phases at room temperature is introduced.
41. Osmium isotopes in the natural isotopic mixture are separation by gas centrifuge technology.
42. These achievements can be regarded as great contributions to the unification of datum mark and scale of isotopic measurements.
43. This change does not disturb isotopic fractionation andthethe stalagmite able to keep environment information.
44. Consistence between isotopic model age of lead ore and intrusion age of quartz porphyry shows close relations among structure movements, magmatism and mineralization in Stage of Yenshan.
45. The isotopic geochronology is an important way for researching the geologic development of these two groups.
46. At the same time, a Sm-Nd isochron age of 1180 Ma is obtained. According to the regional stratigraphic correlation, isotopic age and micropaleoplants, we put the Gaolan Group in the Mesoproterozoic.
47. This article briefly describes the method and applications of isotopic dilution mass spectrometry ( IDMS ).
48. Isotopic scans demonstrate a nonfunctioning ( cold ) nodule that does not concentrate radioiodine.
49. The isotopic abundance ratio and content are determined with isotopic mass - spectrometry.
50. Computative program of isotopic abundances and average atomic weights of elements.
51. The environmental isotopic tracer is a new technique developed in recent years.
51.try its best to gather and create good sentences.
52. The age of emplacement is at Upper Paleozoic Era from the result of isotopic age determination.
53. Isotopic and trace elements data show that mineralizing materials are of multi - sources.
54. Combining the isotopic dilution (ID) method with the on-line fractionation correction method, the rhenium content can be determined accurately at sub-nanogram level using the normal solution n.
55. The procedures for the extract and purification as well as isotopic measurement of boron in natural samples (salt lake brine, seawater and rock) were studied in this paper.
56. Then the isospin effect of the isotopic distribution produced in the fragmentation reaction was investigated via the modified statistical abrasion-ablation model.
57. The Pb, S isotopic study shows that the mass migration and the fractional distillation of Pb isotope took place in the whole rock and in the cement.
58. With the limnological characteristics of water and sediment, the influencing factors on isotopic composition in sedimentary organic matter and carbonate were discussed.
59. Noble gas isotopic geochemistry is a useful tool for studying on mantle degassing and evolution of the Earth′s atmosphere.
60. The Carbon and oxygen isotopic values show big difference among various plants in each peat bog and all plants are of C3 plants.
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