Gamma-ray spectrometry measurements performed on site, or “in situ”, is a widely used and powerful method that can be employed both to identify and quantify ground deposited radionuclides. The purpose of this thesis is to improve the calibration of high purity germanium (HPGe) detectors for in situ measurements, and calculate the combined uncertainty and potential systematic effects. An improve...

The technical details and performance of the newly developed Sandwich spectrometer for ultra low-level gamma-ray spectrometry are presented. The spectrometer, which consists of two HPGe detectors, an active muon shield and a lead/copper shield with a convenient and rapid opening mechanism, is located in an underground laboratory at a depth of 500 m water equivalent. The data is collected in lis...

Poland faces a choice of an environmental radiation monitoring systems (ERMS) for newly designed Nuclear Power Plant (NPP). Contemporary radiation monitoring systems can be based on gamma detector cooperated with Multichannel Analyzer (MCA). This solution will give a tool for very fast assessment of radiological situation around NPP and allows authority to react in case of radiological circumst...

Activation of cGMP phosphodiesterase (PDE) by the rod G-protein transducin is a key event in visual signal transduction in vertebrate photoreceptor cells. Interaction between the GTP-bound form of the alpha-subunit of transducin (alpha t*) and the PDE inhibitory gamma-subunit (P gamma) is a major component of PDE activation. The central polycationic region of P gamma, P gamma-24-45, has been im...

Assay of the radioactive content of waste drums is important for inventory and waste disposal purposes. The sampling of the drum content is a difficult, time and labor consuming procedure, involving special radiation protection considerations. On the other hand the characterization of waste drums containing radioactivity by measuring the drum as a whole (without opening) offers overall simplici...

Substantial increases in the concentrations of the excitotoxin and N-methyl-D-aspartate-receptor agonist quinolinic acid (QUIN) occur in human patients and non-human primates with inflammatory diseases. Such increases were postulated to be secondary to induction of indoleamine 2,3-dioxygenase in inflammatory cells, particularly macrophages, by interferon-gamma. To test this hypothesis, human pe...

Portable EDXRF (Energy Dispersive X-Ray Fluorescence) spectrometer with the ability to perform rock tests in a helium atmosphere was applied prepare unique calibration coefficients and mineralogical models. These data could be used for chemical profiling, chemostratigraphy, gamma-ray, TOC lithological interpretation of borehole geological profile. The measurements were conducted on 19 samples s...

We performed glow-like discharge experiments using deuterated palladium cathode in deuterium atmosphere to investigate the possibility of inducing low-energy nuclear reaction. Anomalous gamma ray emissions in the 80 230keV region were sometimes observed. It was assumed that a nuclear reaction took place during the experiment, producing short-lived radioisotopes, and these radioisotopes emitted ...