Chronicradiationistheradiationreceivedcontinuously inlowdoserateinlongtime. 4.Chronicradiation,thoughisfearedasacuteradiation,is actuallybeneficialtopeople. 5.Chronicradiationwasserendipitouslyobservedtobe alwaysbeneficialtohumansfromtheincidentofCo-60 contaminatedapartmentsinTaiwan. 4 Introduction-2 6.Healtheffectsof...
but also including parts of Thuringia, northern Bohemia (now Czech Republic), and northeastern Bavaria, are still relatively little known internationally.Although this area played a central role in the history of radioactivity and radiation effects on humans over centuries, most of the valuable earlier...
Radioactivity was first observed by Henri Becquerel, a French physicist, in 1896. He noted how certain elements that had unstable nuclei could, under certain conditions, form entirely new elements while releasing electromagnetic radiation and subatomic particles as byproducts in the process. These bypr...
All chemical elements and nuclides consolidated in system of elements on a base of periodic law. Nuclides are similar in texture, have a charge and an atomic weight etc. But some of them inherent property of radioactivity. Such elements and nuclides called radionuclides. Chemical...
Research cigarettes and other study entire body image of each subject. After decay correction to materials for Phase 2 were provided to the subjects the brain scan start time, the radioactivity within the volume of following the first PET scan session. interest was taken as the total dose of ...
Chondrocytes were treated with 0.5% Triton X-100 (100 pL/ well, 10 min) and collected in a multiple-cell harvester on glass fiber filters. The filters were dried and counted in 10 mL Unisolve in a beta-counter for 10 min. Results were expressed as cpm of radioactivity/tissue culture ...
Following administration of radiolabeled cenobamate, unchanged cenobamate accounted for greater than 98% of the total AUC of radioactivity in plasma. Unchanged cenobamate accounted for 6.8% of the dose which was mainly excreted in the urine (6.4%). ...
This resulted from an increase in the fractional catabolic rate of LDL (whether determined by plasma decay curve analysis (P less than 0.05) or urine/plasma radioactivity ratios (P less than 0.001) without significant alteration of its corporeal distribution or synthetic rate. The polyunsaturated ...
The levels of radioactivity in serum (50 μl) and brain regions were counted in a gamma counter (Wizard2, Perkin Elmer, Waltham, MA). The brain/serum (B/S) ratios were graphically displayed against their respective exposure times (Expt). Expt was calculated from the formula: $$Exposure\,...
Half of the brain lysate was used for measuring the amount of radioactivity (counts per minute) and the signal was normalized to the original brain weight. Radioiodine content was quantified using the Perkin Elmer-Wallac Wizard 1480 Gamma Counter. Background radioactivity was subtracted from the ...