[Radioecological monitoring of the Yenisei River and citological characterization of a submerged aquatic plant Elodea canadensis].

The study was devoted to investigation of the contents of radionuclides and of heavy metals and to evaluate the frequency of chromosomal aberrations in samples of Elodea canadensis, a submerged plant, collected in different parts of the Yenisei River. The samples were collected in the area subjected to radioactive impact of the Mining-and-Chemical Combine (MCC) at Zheleznogorsk and in the control area, upstream of the MCC. The investigations shown that elodea biomass in the area affected by MCC operation contained a long inventory of artificial radionuclides typical for the MCC discharges.

[Neurohormonal regulation of the development and regenerative processes of bone and cartilage tissues].

Neurohumoral regulation of cartilaginous and osseous tissues was investigated in different stages of ontogenesis. It has been shown that these tissues are targets practically for all hormones produced by the body. The reciprocal reaction of osseous and cartilaginous tissues to different concentrations of hormones was estimated.

[Genetically determined diseases of the hip joint (a conceptual model)].

The authors consider the problem of pathology of the hip joint from the point of view of the conception "Dysplasia-coxarthrosis". A single system of the ideas concerning dysplastis pathology is presented, which will allow to unify the methods of diagnosis and treatment of dysplasia of the hip joint in children, adolescents and adults with the aim of prevention of crippling diseases of the joint.

[Age-related changes in the intercellular substance of human hyalin and collagen-fiber cartilage tissue].

The articular cartilage of the hip joint and the intervertebral disks (LIV and LV), obtained from 42 corpses without any signs of pathology in these tissues, have been investigated. Six age groups have been distinguished: 21-30, 31-40, 41-50, 51-60, 61-70, 71 years of age and older. After the topo-optic reactions have been get, double refraction of glycosamineglycans (GAG) and collagen is studied in the structure and orientational regularity is estimated in these macromolecules in the matrix.

[Scanning electron microscopy of the surface of Chinese hamster fibroblast-like cells following glycerin treatment].

The effect of glycerol upon the superficial structure of Chinese hamster fibroblast-like cells was studied. The analysis of scanning electron microscopy data made it clear that glycerol-induced changes in the surface structures were of various character depending on the duration of the contact period. A long-term (4 hour long) exposure to glycerol provoked significant structural changes.

[Principles of polarization-optical analysis in the study of connective tissue].

Possibilities of polarization-optic methods for studying macromolecular organization of the intercellular matrix of the connective tissue are demonstrated. Topo-optic reactions, being histochemical, make it possible to reveal not only presence of the molecules studied, but also quantitatively determine degree of their orientational regularity in the structural organization of the intercellular matrix. Determination of changes in the orientational regularity of single molecules contributes to revealing morphogenetic peculiarities of the intercellular matrix of the connective tissue, normal and under development of the destructive-distrophic process.

[Stathmokinetic effect of cryoprotectors].

A study was made of the effect of cryoprotectors, both penetrating the cell (glycerin) and non-penetrating it (polyethylene oxide, m.w. 400), in different concentrations on the mitosis kinetics of short-lived cultures of human peripheral blood cells and continuous fibroblast-like cells of Chinese hamsters.