Effects of mild hypergravity (HG, 2 g) of various durations (1, 2, and 4 h) and the following recovery period (5 h and 7 h after the beginning of HG) on the systems of gaseous exchange and thermoregulation have been studied in adult (9 - 10 months) and old (28 - 29 months) male Wistar rats. The HG-induced body temperature (ВТ) decline was associated with relatively little changes of the oxygen consumption (<$E V roman O sub 2>) and carbon dioxide exhalation rates (<$E V roman CO sub 2>). However, the opposite dynamics were found between ВТ and the coefficient of thermoconductivity. The results support the existing hypothesis, assuming higher rates of heat dissipation during HG. During the whole HG and recovery periods, a positive correlation between ВТ and <$E V roman O sub 2> was observed in the group of adult animals, in contrast to the absence of an analogous correlation in the group of old rats.

• Тимченко Ганна Миколаївна (біологічні науки)

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