Electronic states in heterostructures formed by ultranarrow layers.

Low-energy electronic states in heterostructures formed by ultranarrow layers (single or several monolayers in thickness) are studied theoretically. The host material is described within the effective mass approximation and the effect of ultranarrow layers is taken into account within the framework of the transfer matrix approach. Using the current conservation requirement and the inversion symmetry of an ultranarrow layer, the transfer matrix is evaluated through two phenomenological parameters.

[Primary diagnostics of nutritional status in draftees].

Economic crisis phenomena primarily affect negatively the consumer market of foods. And a human being needs adequate nutrition. In adolescence, the growing organism is most susceptible to imbalanced and physical activity-inadequate nutrition.

[Treatment of initial diacrisis of disorder of trophological status in servicemen].

The authors consider the problem of objectivity of initial diacrisis of disorder of trophological status as in case of manning and troops of Northern Fleet and also in the interest of military physician expertise at determining of fitness for service. In terms of retrospective analysis of assessment's results of food status of recruits, submariners and divers in accordance with Government decree N 123 the authors quarreler ranges of denotation of body mass index which are adjusted in this document referring to their own researches. Their research let to get a new denotation of body mass index: "nutritional inadequacy"--< 16,59, "suralimentation"--16,60-19,17, normal balance of growth and weight--19,18-24,31.