Radon is the most important source of natural radiation to human beings and second major causative agent lung cancer other than smoking. In recent years, hazards exposure thoron (Rn-220), another isotope radon, its progeny have gained consensus. To accurately evaluate dose level Rn-220 progeny, a standard chamber with strong regulation ability for needs be established scale or calibration measu...

T WO experiments involving 296 pigs from gilts fed diets containing low (2%) or adequate (17%) protein during gestation followed by 5% or 17% during lactation were conducted to determine the effect of maternal dietary protein level on performance of the progeny. Blood hematocrit, hemoglobin and plasma protein levels were not affected by the dietary treatments imposed on the dam during gestation...

INTRODUCTION UNSCEAR (1) reported that the effective doses due to inhalation of radon (Rn) and its progeny account on average for about one-half of all natural sources of radiation. In recent years, indoor surveys in Europe and Asia revealed that the dose contribution from thoron (Rn) and its progeny can equal to or even exceed that of Rn and its progeny (2). For assessment the public exposure ...