[Morphometric ultrastructural analysis in laryngeal cancer]. / Morfometricheskii analiz ul'trastruktur pri rake gortani.

A comparative electron microscopy study of the ultrastructures of cancer cell and normal stratified squamous epithelium of human larynx was carried out in bioptical and resected material to identify characteristics of cataplasia development in laryngeal squamous-cell carcinoma. A morphometrical analysis showed the two following indices of quantitative evaluation of cellular ultrastructures of laryngeal squamous-cell carcinoma to provide most information on the degree of cataplasia development: the development of an independent polyribosomal apparatus which points to the level of "intracelluar" protein synthesis and the level of total protein synthesis in cell cytoplasm. Cataplasia progression is accompanied by the advancement of the structural and functional organisation of both polyribosomal apparatus and ergastoplasm.

[Genome structure in higher plants. Reassociation kinetics of DNA from Vicia faba and Vicia sativa]. / Struktura genomov vysshikh rastenii. Kinetika reassotsiatsii DNK Vicia faba i Vicia sativa.

The work been concerned with a study of the kinetics of reassociation of total DNA and that of the fraction of unique sequences in plants from the Vicia family, i. e. Vicia faba and Vicia sativa. The size of the genome was determined by the kinetics of reassociation of the DNA of the fraction of unique sequences and the amount of DNA per nucleus was determined cytophotometrically. It has been shown that the size of the genome expressed in C(0)t units and the size expressed in gramms are not the same which testifies to the absence of true unique genes in the genome of the species studied. The analysis of the possible methodical errors was carried out. On the basis of the data obtained a suggestion was made of a model of chromosomes organization including 12 units of polynemization for Vicia faba and 4 units for Vicia sativa.