[Osmometry].

The osmotic concentration, or osmolality, of biological fluids is measured by means of osmometers-cryoscopes, whose operating principle is based on cryoscopy, namely on the determination of the osmolality of solutions from the change in their freezing point. The osmometers-Cryoscopes can determine the effective osmolality that is created by the inorganic molecules of a solution. Stable osmolality in the body fluids is provided by an osmotic pressure Regulatory system.

[Cloning and identification of an Agrobacterium radiobacter 5D-1 chromosome fragment involved in control of nitrogen metabolism, biosynthesis of indolylacetic acid and replication of ColE1 plasmids].

Pleiotropic chromosomal mutations were earlier identified in saprophytic associative bacterium Agrobacterium radiobacter 5D-1. The mutations changed nitrogen metabolism, disturbed synthesis of indolylacetic acid (IAA), and conferred the ability to sustain replication of ColE1 plasmid derivatives, which are not normally maintained in bacteria other than Escherichia. The mutations were designated Nr (Nitrogen metabolism) and assigned to a single cluster on an A.