137Cs-gamma irradiation of bacteriophage T4 induces large deletions plus a variety of types of point mutations. All mutations arise with single-hit kinetics, and all by a misrepair process. The estimated point mutation rate is 1.5 X 10(-9) per locus per rad.

Background: The Patterson-Parker table was created in 1934 to determine mg-hr required to deliver the prescribed dose to the treatment area. These tables were created using the dosimetric data for 226Ra that was determined in air and were utilized for dose calculations around implants with Ra-equivalent radionuclides such as 137Cs and 192Ir. Therefore, the differences of the tissue attenuation ...

Caesium displays similar chemical properties to biologically essential K+ and can be accumulated intracellularly by microorganisms via monovalent cation transport systems, which under normal circumstances mediate the uptake of K+ (or Na+) [ 1.21. As well as the ecological importance of such interactions in the environment, where they may involve radioactive caesium, there is also a potential ap...

Radioactive contamination in the Tokyo metropolitan area in the immediate aftermath of the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was analyzed via surface soil sampled during a two-month period after the accident. 131I, 134Cs, and 137Cs were detected in these soil samples. The activity and inventory of radioactive material in the eastern part of Tokyo tended to be high. The 134C...

Telah dilakukan penentuan konsentrasi radionuklida 137Cs pada susu sapi di Nagari Sungai Kamuyang, Sumatera Barat. Penelitian ini bertujuan untuk menentukan buatan yang ditinjau berdasarkan PERMENKES RI No. 1031 tahun 2011, serta rumput dan tanah PERKA BAPETEN 16 2012. Sampel diukur terdiri dari sampel sebanyak 3 liter, 2 kg, kedalaman 0-15 cm kg. diawali dengan preparasi sampel, kemudian selam...

In the present study, 137Cs and 238U activity concentrations, 234U/238U ratio, 235U/238U isotope ratio were measured in fifteen soil samples collected from exclusion zone around Fukushima Daiichi Nuclear Power Station (FDNPS). The concentrations of Fukushima-accident contaminated ranged 29.9 to 4780 kBq kg−1 with a mean 2007 kg−1. On other hand, these 5.2 22.4 Bq 13.2 ratios 0.973 1.023. varied...

background: knowledge of radioactivity levels in human diet is of particular concern for the estimation of possible radiological hazards to human health. however, very few surveys of radioactivity in food have been conducted in iran therefore the baseline values of the natural radionuclides concentration (40k, 226ra and 232th), and man made radionuclide, 137cs, were determined in twenty six sam...

Background: One of the main sources of exposure to radiation is terrestrial radionuclides in the environment. These radioisotopes are present in the Earthchr('39')s crust and can be increased by human activity such as mining of coal, oil, and minerals. Materials and Methods: In this study, 39 soil samples including virgin and cultivated were collected from around of the Shazand Refinery Complex...