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31. Stable isotope labeled L - tryptophan is an application of nucleus technology in amino acids.

32. Brachytherapy, the direct application of a radioactive isotope into the tumor bed, delivers a high dose to the tumor as compared to the surrounding normal tissue.

33. Oxygen isotope variation maybe results from crystallization, degasification or hybridization of crust materials.

34. The isotope analytic technique of the agrochemical remainder is increasingly valued by people, and has made a substantial development.

35. Environmental records show that in that area the environment was extremely cold and wet during the interstage of the last glaciation(deep sea oxygen isotope stage 3).

36. Method Cellular proliferation were studied by isotope labeling technique, and the concentrations of intracellular anticancer drugs were measured by fluorospectrophotometry.

37. Centrifuge cascade hydraulics plays an important role in efficient isotope separation in gas centrifuge cascades.

38. A synthetic element produced in trace quantities by helium isotope bombardment of curium.

39. The Strontium isotope composition of marine autogenetic minerals can reflect the sea level fluctuation trend during the minerals deposited.

40. The paper for the first time reports on the analytical results of hydrogen-oxygen isotope of the hot-spring water from Fujian and Jiangxi.

41. The most abundant isotope of hydrogen, H 1, with atomic mass 1.

42. An isotope of hydrogen with mass number greater than 1; deuterium or tritium.

43. Here we use an expanded marine sedimentary section from Spitsbergen to reconstruct the carbon isotope excursion as recorded in marine organic matter.

44. Its most durable isotope survives only about 200,000 years - a minute span on a stellar scale.

45. The maintenance experinence of old MAT isotope mass spectrometer has been discussed.

46. Solving the static characteristic roots of hydraulics in isotope separation centrifuge cascades is an important problem.

47. As Discovery News reports, thanks to a critical shortage last year, the price of the isotope helium-3 has skyrocketed from $150 per liter to $5,(http://Sentencedict.com) 000 per liter.

48. It would take many months of follow-up work in shore-based laboratories, including critical isotope geochronological work, to confirm our findings.

49. This article reported that 9 cases of CRF and 27 cases in good health were observed in our Department using isotope scintiscanning technique.

50. Even Francium's most stable isotope, Francium - 223 only has a half - life of 22 minutes.

51. The researchers used what's called an ion microscope to compare the amount of normal hydrogen in the moon rocks to the amount of the hydrogen isotope deuterium, which carries an extra neutron.

52. At present, radioactive isotope tracing and impulse oxygen activation are the two mostly used methods for injection profile logging in separated-zone water injectors.

53. Isotope tracer technique showed that glucosamine sulfate above can pass through the skin in vitro of test animal in a diffusion cell and osmose into subcutaneous tissue.

54. The contents concern in the development of radioactive isotope tracer energy spectrum logging device, the calibration experiment in model well, the analysis of experimental data, the data ...

55. Stable isotope ratio analysis is an effective method for the identification of fruit juice adulteration.

56. The studies on constant element, trace element, REE and lead isotope indicate that the subalkalic intrusive complex body is formed by deep crust mantle migmatization.

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

58. Today, most cyclotrons are used either for instructional purpose or for isotope production.

59. Another isotope, lithium-6, is overabundant: there may be as much as 1000 times too much of it.

60. For instance, because it takes only 8 days for the radioactive isotope iodine-131 to decay away to half its original level of radioactivity, simply waiting should be a fix.