Ultrastructural changes of hypothalamic endocrine zones after irradiation with high energy carbon ions, neutrons, and gamma-rays*.

Ultrastructural lesions in the cells of hypothalamicendocrine zones of the rat brain were investigated 2 and 5 weeks after the exposure to accelerated carbon ions (E = 300 MeV/nucleon) and gamma-rays at a dose of 1.0 Gy and 11 weeks following irradiation with fast neutrons (1.5 MeV) at the doses of 0.

Morphological changes in rat's brain choroid plexus after exposure to low doses of high energy oxygen ions, fast neutrons, and gamma radiation.

Ultrastructural and morphometrical changes in choroid plexus cells of the rat's brain in the delay period after irradiation with low doses of oxygen ions [= 300 MeV/nucleon], and fast neutrons [1.5 MeV], and gamma rays (Co60) were described. The applied irradiations provoked similar ultrastructural changes in choroid plexus cells; however, the obtained morphometrical data showed differing effects of these radiations, due to, probably, different mechanisms of their effect on the cells.

[Ultrastructural changes in neurons of the arcuate nucleus-median eminence complex in rats irradiated with carbon ions and gamma rays].

Ultrastructural changes in the arcuate nucleus and medial eminence area of rats were examined 5 weeks after their exposure to accelerated carbon ions with an energy of 300 MeV/nuclon and 60Co gamma-rays at a dose of 2.0 Gy. In carbon-irradiated animals the ultrastructural changes of arcuate nucleus neurons, their processes and synapses were more significant and diversified than in gamma-irradiated rats.

Experimental immune oophoritis as a model for studying the thymus-ovary interaction: 1. Morphological studies.

The experimental immune oophoritis (EIO) model was used to study the functional relationship between the ovary and organs of the immune system. EIO was developed in Balb/c mice by twofold subcutaneous injection of saline ovarian extract in complete Freund's adjuvant. The ovary, thymus, and spleen were investigated histologically, histoautoradiographically, and electromicroscopically on days 7, 14, 21, and 28 after immunization.