[A new dried nutrient medium for the isolation of Corynebacterium diphtheriae (its development and experimental study)].

A new dried diagnostic medium for the isolation of C. diphtheriae has been developed on the basis of aminopeptide. This new aminopeptide-based medium compares favorably with Buchin's medium in its growth and inhibitory properties.

[Pre- and postcapillary resistance and transcapillary fluid exchange in the intestine under the effect of hypoxic and hypothermic stimuli in the body].

In increase of pre- and postcapillary resistance due to hypothermia, hypoxia induced no considerable shifts in back-ground values of the organ hemodynamics in the cat small intestine preparations constantly perfused with own blood.

[Capillary filtration coefficient and the distensibility of the venous vessels of the small intestine in the process of high-altitude adaptation].

In acute experiments on cats, the increase of capillary filtration coefficient and venous distensibility in small intestine was revealed after 3-5, 14-16 and 29-31 days of high altitude adaptation (The Pamirs, 3370 m above sea level), the changes being more obvious (by 78% and 45%, resp.) after 3-5 days in comparison with low altitude control. The effects of noradrenaline on the small intestine precapillary sphincters and venous distensibility were preserved at high altitude, whereas regional blockade of alpha- or beta-adrenoreceptors exerted no effect on the results.

[Adrenoreactivity of the vessels of the small intestine during adaptation to high altitude in the cat].

Responses of the resistance and capacitance vessels of small intestine to adrenergic stimulation and blockade were studied in acute experiments on cats after 3-30 days of high altitude adaptation (the Pamirs, 3370 m). In comparison to control (Dushanbe, 830 m) constrictor responses of the resistance vessels to noradrenaline and adrenaline were significantly increases at high altitude, whereas the dilator responses to beta-stimulator propranolol were obviously reduced. Changes of venous blood outflow from small intestine in response to catecholamines at high altitude exceeded the control values.