Background: The natural radioactivity level and the radon concentration of soil were measured at four important geothermal area located in Dikili geothermal region, Turkey. Materials and Methods: The natural radionuclide content of soil samples were measured by NaI(Tl) gamma spectrometer system and the soil radon concentration were determined using Kodak-Pethe LR-115 Type II Solid State Nuclear...

The use of radioactively labelled proteins for studying proteolysis is well established (Schneider et al., 1965), as are techniques for radiolabelling proteins, which have been developed mainly for radioimmunassay procedures (Yalow & Berson, 1966). 1311 has been the favoured isotope for such work, although it has a short half-life (8.04 days). "'I has a longer half-life (60 days) and can be eff...

Strontium-89 (Sr-89) alone or with concurrent chemotherapy has a role in the treatment of patients with prostate cancer (PCP). The schedules for repeated doses of Sr-89 or for concurrent chemotherapy is undetermined. The objective of this study was to measure the effective half-life (Te) of Sr-89 using a detector available in a nuclear research facility. Blood and urine samples obtained from PC...

1. The involvement of intracellular 3':5'-cyclic AMP in the inhibition of platelet aggregation by prostaglandin E(1), isoprenaline and adenosine has been examined by a radiochemical technique. Platelet-rich plasma was incubated with radioactive adenine to incorporate (14)C radioactivity into platelet nucleotides. Pairs of identically treated samples were taken, one for the photometric measureme...

Abstract Compared with other methods for measuring radioactivity in water, liquid scintillation measurement has the outstanding advantages of fast sample pretreatment, simple method and high detection efficiency. Based on spectrometer (SIM-MAX LSA3000B), 14 C 90 Sr- Y are selected as typical nuclides to study change TDCR quenching correction curve under different activity concentrations, basic ...

Radioactive components of the interstellar medium provide an entirely-different and new aspect to studies medium. Injected from sources nucleosynthesis, unstable nuclei decay along their trajectories. Measurements can occur through characteristic gamma rays that are emitted with decay, or in cosmic material samples abundances parent daughter isotopes as they change decay. The dynamics flows wit...