A synchrotron radiation study of the one-dimensional complex of sodium with (1S)-N-carboxylato-1-(9-deazaadenin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol, a member of the 'immucillin' family.

The sodium salt of [immucillin-A-CO(2)H](-) (Imm-A), namely catena-poly[[[triaquadisodium(I)](mu-aqua)[mu-(1S)-N-carboxylato-1-(9-deazaadenin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol][triaquadisodium(I)][mu-(1S)-N-carboxylato-1-(9-deazaadenin-9-yl)-1,4-dideoxy-1,4-imino-D-ribitol]] tetrahydrate], {[Na(2)(C(12)H(13)N(4)O(6))(2)(H(2)O)(7)] x 4 H(2)O}(n), (I), forms a polymeric chain via Na(+)-O interactions involving the carboxylate and keto O atoms of two independent Imm-A molecules. Extensive N,O-H..

[The asymmetry of parietal-visual and parietal-auditory transcallosal potentials and their sex dimorphism].

"Reverse" transcallosal responses (TCR) occurring in the visual and auditory cortex during stimulation of the temporal associative cortex of opposite hemisphere, were studied. The right hemisphere was shown to domineer in females, whereas a greater latency of the temporal-visual positive-negative TCRs was found in the males' right hemisphere and the females' left one. These and other data obtained suggest a greater lateralisation of the brain in males.

[The intrahemispheric contrast in transcallosal responses and its interhemispheric asymmetry in animals of both sexes].

A certain dynamics of changes in intrahemisphere contrast was revealed in the process of development of the transcallosal response: in the beginning of the response the right hemisphere is more focal, then the left one and afterwards again the right hemisphere. In males, the main changes of focality are related to the left hemisphere whereas in females--to the right one. The focality of a greater value is characteristic of the males' transcallosal responses whereas the distribution of the EPs is more diffuse in females.