Effect of the oxidation-reduction potential of the medium on the production of gentamycin

The medium redox potential had an effect on gentamicin production by Micromonospora purpurea v. violacea, strain VNIIA 7R. The Eh influence was shown to be statistically reliable when the results were expressed in relative units against the control. In the laboratory experiments with low volumes of the medium the Eh increase by more than 170 per cent induced inhibition of gentamicin biosynthesis while the Eh increase by 108 to 168 per cent induced stimulation of the activity.     

Mycelial Fungi Maintained in the All-Russia Collection of Microorganisms (VKM)

Data on the possibility of using the diversity of mycelial fungi maintained in the All-Russia Collection of Microorganisms (VKM) at the Institute for Biochemistry and Physiology of Microorganisms (Russian Academy of Sciences) for research and biotechnological purposes (as producers) are presented, together with information on additions to the basic collection.     

Mycelial fungi maintained in the Russia Collection of Microorganisms (VKM IBPM RAS)

Information on application of diversity of mycelial fungi maintained in the Russia Collection of Microorganisms (VKM) at the Institute for Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences to research and biotechnology as producers is presented, as well as data on additions to the basic collection.     

Individual sensitivity of Wistar rats to piracetam

Effects of repeated piracetam (PIR) injections in a dose of 40 and 250 mg/kg/day on the learning in Water rats were studied. It has been found that character of the effects depends on typological features of the animals. Rats with strong predominance of excitation (choleric type) showed low sensitivity to PIR. Small dose of PIR provoked clear negative effect in rats with relative balance of the basic nervous processes: excitation and inhibition (sanguine and phlegmatic types). Despite of expressed activation of associative process, it complicated integrative activity. Small dose of PIR showed anxiolytic and psycho-stimulant actions only in initially unlearned rats characterized by high level of fear. Large dose of PIR had negative influence on the learning process in all animals, irrespective of typological features. Thus, the results of this study allow to suppose that the individual sensitivity of an animal to action of a pharmacological medication is caused by morpho-functional and neurochemical intraspecific heterogeneity.