ABSTRACT
For experiments with dispersed radioactive aerosols in a radon-aerosol chamber (RAC), it is desirable to know the activity of the radioactive aerosols applied in the RAC. A COLIBRI TTC survey metre with an SABG-15+ probe (Canberra, USA) was purchased for this purpose. The probe is designed for surface contamination measurements, and it is intended to measure the activity of aerosols deposited on the filters during experiments in the RAC. Since the probe is calibrated in a different geometry, its response in the authors' experimental geometry was simulated by a Monte Carlo method. The authors present a Monte Carlo model using MCNPX and an experimental verification of this probe model.
Subject(s)
Aerosols/analysis , Air Pollutants, Radioactive/analysis , Radioisotopes/analysis , Radiometry/instrumentation , Alpha Particles , Calibration , Computer Simulation , Equipment Design , Gamma Rays , Models, Theoretical , Monte Carlo Method , Radiation Monitoring/instrumentation , Radiometry/methodsABSTRACT
The influence and the role of corticotrophin analogue 4-10 on the rabbits' behaviour in spontaneous conditions was analysed. The data analysis indicated that analogue 4-10 with modified aminoacid sequence in 8, 9, 10 positions significantly influenced the behavioural changes in the general model of behaviour. The 4-10 corticotrophin derivative caused the suppression of aggression, considerably reduced the tension and orientation-cognition reactions, however, it prolonged comfort and grooming significantly. This may prove the noticeable reaction of analogue 4-10 in modification of behavioural pattern, which was expressed by restraining the reaction of stressogenic character with simultaneous attenuation and prolongation of appetite reactions.
