[Combined effect of microwave and ionizing radiation].

The response of different physiological systems to ionizing radiation as modified by UHF irradiation of nonthermal intensity was investigated. The experimental rats were exposed to electromagnetic irradiation of the power flux density (PFD) 200 microW/cm2 30 min daily for 8 days and the next day they were exposed to single total-body gamma-irradiation at a dose of 5.5 Gy.

[Combined effect of microwaves and gamma-rays on the imprinting of chickens, irradiated in early embryogenesis].

A study was made of the combined effect of microwaves (40 microW /cm2, 5 min) and gamma-radiation on imprinting of chickens exposed 24 h after the beginning of incubation. It was established that microwaves and gamma-radiation delivered simultaneously during early embryogenesis exerted a distinctive influence on the central nervous system (the formation of imprinting was impaired) which was different from that produced by gamma-irradiation alone.

[Repeated immune response in gnotobiotic rats].

Repeated immune response to diphtheria toxoid was investigated in monocontaminated rats. It was shown that repeated immunization of these animals led to a sufficiently intensive immune response by the secondary type, but it ended much earlier than in the usual animals (by the 12th day). A supposition is put forward that earlier termination of the secondary response in gnotobionts is caused by the absence in their lymph nodes of an additional differentiation of cell-precursors at the late periods of secondary immune response.