[Features of autolytic restructuring of lipids in plasma, serum, and blood clots].

Quantitative composition and amount of main lipid fractions were studied by means of microthin-layer chromatography in blood clot free of cell elements, in blood serum and plasma obtained from volunteers as well as their alterations were estimated in dynamics of autolysis. Dissimilar alterations were detected in total lipids and their individual fractions in the preparations studied. Under conditions of incubation the lipid component was found to be highly labile in blood plasma and serum, where total content of lipids was distinctly decreased, while the lipids content was not considerably altered in blood clot.

[Dynamics of the population structure of the Escherichia coli recombinant strain during continuous culture].

The populational structure of the Escherichia coli strain Z905 containing the recombinant plasmid with the phenotype AprLux+ was studied in chemostat. It was shown that the stability of the ratio of plasmid containing cells and cells without plasmids depends in the first place on the presence of the selective factor (ampicillin) in the medium and on the sources of carbon and energy limiting growth.

[Comparative restriction analysis of chromosomal DNA of strains of Photobacterium leiognathi].

Chromosomal DNA in 5 hereditary variants occurring in Photobacterium leiognathi population was subjected to restriction analysis. The variants differed in the levels and regulation of luminescence and colony morphology. Agarose electrophoresis of DNA fragments isolated after exposure to Hind II, Bam HI, Bgl I and Pst I restriction endonucleases revealed respectively 38, 28, 35 and 29 fragments equally distributed by their molecular weights.