Background: Natural radionuclides in rock samples, primarily 238U (uranium), 232Th (thorium) and 40K (potassium), are the main source of radiation exposure to workers and general public and their measurement is of paramount importance from radiation protection point of view. Materials and Methods: Gamma spectrometry using HPGe detector was used to measure the radioactivity and assess the radiol...

Methods for measurement of rates of collagen synthesis in vivo have thus far been technically difficult and often subject to quite large errors. In this paper a simplified method is described for obtaining synthesis rates of collagen and non-collagen proteins, for tissues of rabbits. This involves an intravenous injection of [3H]proline, administered with a large dose of unlabelled proline, and...

The Jiangmen Underground Neutrino Observatory will build the world's largest liquid scintillator detector to study neutrinos from various sources. 20 kt be stored in a $\sim$600 t acrylic sphere with 35.4 m diameter due good light transparency, chemical compatibility and low radioactivity of acrylic. concentration U/Th is required less than 1 ppt (10$^{-12}$ g/g) achieve radioactive background ...

The biosynthesis of benastatin A, produced by Streptomyces sp. MI384-DF12, has been studied by feeding experiments with 14C- and 13C-labeled compounds followed by measurement of radioactivity and 13C NMR analysis. The results indicate that benastatin A is derived from two methionine units and fourteen acetate units, condensed in the "head-to-tail" fashion of typical polyketide biosynthesis.

Heavy-ion radiotherapy is currently recognized as the most advanced particle therapy method and being vigorously promoted applied worldwide. This can rapidly generate radiation induce radioactivity during treatment. However, induced radioactivity, which primary source of exposure for medical staff, does not disappear following therapeutic application in treatment room. In this study, we investi...

Soil contamination may occur in the upcoming decommissioning activities of TRIGA2000 Reactor. Measurement contaminant radioactivity, which can be performed using single-channel spectroscopy, is required soil decontamination processes. This research develops a timer/counter system for spectroscopy microcontroller. The performance ATMega328P microcontroller Timer/Counter on Arduino has been teste...