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61. Tests on three helicopter aircrews returning to the carrier after conducting missions near Sendai meanwhile "identified low levels of radioactivity on 17 air crew members," the statement said.

62. The Curies and scientist Henri Becquerel won a Nobel Prize for Physics in 1903 for discovering radioactivity.

63. Disposal of wastes with radioactivity and other radioactive substances on the sea is forbidden. The exemptible radioactive content in the wastes shall be determined by the State Council.

64. Type of radioactive disintegration (see radioactivity) in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle.

65. Radioactivity refers to the phenomenon of emitting ionizing radiation when a radionuclide spontaneously disintegrates.

66. This concept is relied upon, for example, when anthropologists use carbon-14 to date ancient artifacts and when doctors determine the proper dose of radioactivity to treat a cancer patient.

67. At the surface, radioactivity of the conglomerates is locally as high as 30 X background.

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68. The results showed that the radioactivity levels of each nuclide in Yangtze River water system were still lower than that of background, and did not cause contamination.

69. In order to meet the safety requirement of radioactivity logging of oil industry, the radioactive source status monitor is developed.

70. The nuclear process involves several stages, which the danger of radioactivity constantly present.

71. This paper reports the radioactivity ratios about the untraditional building materials in Anhui Province, at recent years.

72. A metal called uranium gave off a kind of radiation, which Marie Curie later called radioactivity.

73. Japan's national broadcaster NHK said the pool had lost two-thirds of its water, releasing large amounts of radioactivity.

74. To investigate levels of skin exposure, the researchers took radioactively labelled BPA and observed the movement of radioactivity through pig ear skin — a widely used model for human skin.

75. The Institute of Radium of National Academy of Peiping was the first institute in the field of radioactivity in China. In 1948, it was reorganized into the first institute of Atomics in China.

76. 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.

77. The process by which an atom changes from an unstable state to a morestable state by emittingradiation is called radioactive decay or radioactivity.

78. For good reason: 20 years ago this month, the Homyel region was drenched with radioactivity from an explosion at the nearby Chornobyl nuclear power plant.

79. This led her to deduce that there were other substances within pitchblende that had properties of radioactivity.

80. It is the product of radioactive decay ( see radioactivity ) and is used in helium dating.

81. In opposite to other tissues and organs, the radioactivity in stomach, intestine and bone gradually went up with time.

82. Vanadium alloy, with low radioactivity and high high-temperature strength, is taken as one of the candidate structural materials for fusion reactor blanket.

83. A computer code FDKR and its associated data library AF-DCDLIB have been developed for fusion-fission hybrid reactor radioactivity calculations.

84. As we have learned, this product does not have radioactivity, bibulous rate low, intensity is high, fight corrupt ability and wear-resisting performance are good, use won't efflorescent chap for long.

85. Measurement of radioactivity in the environment-Soil. Part 7 : methodology for strontium 90 activity measurement in soil samples.

86. Radioactivity is painful to right shoulder or back visible at cholelith disease, to perineal ministry person wait for ureter stone.

87. The practices verify that concrete has function of shielding strong ray. Thus the construction difficult issue how to efficiently solve cobalt 60 with strong radioactivity in construction is overcome.

88. Electricity and radioactivity have little in common and do not resonate.

89. The inherent danger of concentrating the amount of radioactivity necessary to produce commercial power is simply far too great for civilization to tolerate.

90. Because of the radioactivity in waste water of rare earth factories, the purificatory principle of radioactive waste water, and adsorption of some clay minerals and soils for rare earth was studied.