ИСТИНА

When working at a long-term lunar base, at stations in the near-moon space and during inter- planetary missions cosmonauts will be continuously exposed to an entirely new environmental factor - hypomagnetic conditions (HMC). Interplanetary magnetic eld and the eld on the Lunar surface is three-ve orders of magnitude below the usual geomagnetic eld (GMF). It is well known that exposure to even a slightly decreased GMF adversely aect human and other living systems. Nervous, endocrine, cardiovascular systems and blood are considered to be the most sensitive to reduced GMF. There are some data in literature about the signicant vulnerability of developing organism to the HMC. In this paper we present the results of fur- ther studies on the impact of the HMC on the embryogenesis of the Japanese quail (Coturnix coturnix japonica), including the works performed as the development of studies reported at the conferences COSPAR 37 and COSPAR 39. Duration of quail embryos exposure to dier- ent values of attenuation HMC (till thousandfold and more) came up to 18 days. It is shown that the prolonged exposure to the HMC heightens the adverse eects on embryogenesis. The background of alternating electromagnetic elds of the systems and equipment will exist at the habitable base or on the board of the spacecraft. The results of studies on the combined eects of HMC and weak alternating magnetic elds are also presented.