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M A Monakhova N V Kolesnikova Z G Kokaeva 《Nauchnye doklady vysshe? shkoly. Biologicheskie nauki》1988,(4):85-90
The frequency of somatic conjugation of the 2nd and 3d chromosome pairs has been analysed in male and female neural ganglia from Drosophila melanogaster larvae D-32 line. The frequency of conjugation found for males was 1.5 times lower than for females. On this basis a supposition concerning less duration of homologous conjugation in males has been put forward. It is suggested that it is due to the differences in space arrangement of homologous chromosomes holding their conjugation. 相似文献
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A N Inozemtsev F F Kokaeva I I Kozlovski? E I Sarychev V M Demidov N A Tushmalova 《Biulleten' eksperimental'no? biologii i meditsiny》1990,109(5):445-446
In this work we have compared the effect of Tuftsin Group synthetic heptapeptide (TP-1) and Piracetam on learning of avoidance response and its restoring after disturbance provoked by unexpected changes of previously established cause-effect relations in experimental environment. We have pointed out that both of the drugs improve learning but the dynamics is different, namely: Piracetam causes the greatest improvement on the 1st day, meanwhile the Heptapeptide--on the 4th day. Both of them preclude from disturbing avoidance response and this protective action of peptide is more effective. 相似文献