As we have seen, radioactivity is "natural," and we all contain things like radioactive carbon-14. There are also a number of man-made nuclear elements in the environment that are harmful. Nuclear radiation has powerful benefits — nuclear power generates electricity while nuclear medicine detects...
One of the best tools to protect populations during a nuclear event are Geiger Counters, thus the US and other countries built and stockpiled hundreds of thousands of Geiger Counters during the Cold War for use in the event of nuclear conflict. In those days the risk was primarily related to...
when Nobel Prize winner Baruch S. Blumberg (1925–2011) reported for the first time publicly on the discovery of a new antigen named Australia antigen (AuAg) (reference [1], page 82). In the years following, AuAg would become the first specific marker of viral hepatitis. Thereafter, viral...
For each category, 40 slides were presented for 2000 ms in an individually randomized order using an event-related design. The inter-trial interval was randomized between 2.0 and 9.9 s (mean 6.0 s). During the inter-trial interval, a fixation cross was presented. Participants were instructed ...
and the amount of radioactive iodine 125 on the solid phase (at the time, a plastic bead) was measured. Since radioactivity can be detected with very high sensitivity, the process opened new dimensions in detection sensitivity that could be pushed from several micrograms/ml to a few nanograms...
Radiometric Dating Provides an Accurate Method to Know the Age of the Earth In 1896, the French chemist A. Henri Becquerel discovered radioactivity, the process where materials decay into other materials, releasing energy. Geologists realized that the interior of the Earth contained a large amount ...
Inside the heat exchanger, the water from the reactor gives up its energy to cooler water flowing in another closed loop, turning it into steam. Using two unconnected loops of water and the heat exchanger helps to keep water contaminated with radioactivity safely contained in one place and well...
radioactivity), gas emissions, ionosphere condition parameters, Earth radiation belt, Sun wind, crust parameters (strain, deformation, displacement) and biological precursors is proposed. The achievements of tidal potential modeling of Earth surface with included ocean and ...
The trapped radioactivity was measured with a liquid scintillation counter. The activity of spermidine (Spd) synthase was assayed in a reaction mixture of pH 8.0 Tris-HCl (0.1 M). The production of 5′-deoxy-5′-methylthioadenosyne was quantified by using a fluorescence detection method (a ...
For analysis, 5 mL of scintillation liquid (Ultima Gold) was added, and the radioactivity was counted on a Perkin Elmer Liquid Scintillation Analyzer Tri-Carb 2800TR. The measured leucine incorporation was converted to g carbon incorporated per L per hour (according to Simon & Azam [32]) ...