[Effect of alantone on mast cells and hemostasis].

In experiments on rats it has been shown that under the influence of alantone (50 mg/kg of the body weight daily during 30 days) a number and level of maturity of peritoneal and mesenteric mast cells increased, and blood clotting decreased. It might be important for the well-known ability of alantone to increase both the peripheral blood circulation and microcirculation.

[The use of radiodiagnostic apparatus as human radiation counters in large-scale radiation accidents].

The problem of dosimetry of internal irradiation necessitates the use of human radiation counters (HRC). A state system of radiation safety should be based on a HRC stock in case of large-scale radiation accidents. Radiodiagnostic units can run in the HRC mode therefore they must be considered as an active reserve widely spread throughout the country.

[The dynamics of the content of incorporated cesium radionuclides in the population of regions with an elevated background radiation].

The authors represent summarized data on the time course of incorporated Cs in the population of the Krasnogorsk District of Bryansk Province over the period of June 1986-July 1989. A RIKh-5M device used as a counter of human radiations, its technical data and calibration methods were described. A retrospective analysis has shown that the main accumulation of radionuclides occurred before May 15 1986.

[The use of a hybrid scanner as a human radiation counter].

The most promising devices of those for radionuclide diagnosis that can be used for control of nuclides incorporated in the human body during a radiation incident are hybrid scanners. The authors made the calibration of devices of this type to register a mixture of 137Cs and 134Cs. The minimum detected activity was 40 nCi.

[Methods for monitoring the integral nonuniformity of the response of a gamma-camera detector].

The paper is concerned with methods of monitoring of integral inhomogeneity (II) used in standards of international organizations and in recommendations of the IAAE. Quantitative analysis of errors at different stages of measurement and processing was performed. Statistical effects were investigated on a mathematical model of an absolutely homogeneous detector.