[Specificity of the protein distribution in the nucleus and cytoplasm of the cells of provisional and definitive structures in early human embryos].

The highest amount of total protein in a 17-day human embryo is found in nuclei of the ectodermal germ layer. Histones are distributed as small clods whereas histones-like proteins vary in quantity in the apical and basal parts of the cells. During the 2nd and 3d months of embryogenesis protein topography in cells of different organs and systems is not the same and corresponds to the human histo- and organogenesis rate.

[Structure and physicomechanical properties of the human dura mater from the age aspect].

The reconstructive surgery embracing a wide range of operations, when the dura mater is used as plastic material, requires a profound study of its physico-mechanical and structural properties. The dura mater obtained from 150 human corpses of persons at the age of 1 month of embryogenesis up to 90 years has been studied by means of morphological, histochemical methods and using the device for mechanical testing of various biological materials. In ontogenesis of the dura mater three states are arbitrary distinguished: development, stabilization of morphological structures and involutional-degenerative changes.

[Normal 17-day human embryo. Qualitative and quantitative characteristics of protein components].

Protein components in the definitive and provisory anlages of the 17-day-old human embryo "Krym" have been studied in a complex investigation. Acidic, basic and summary proteins, nucleoproteids and some amino acids (histidine, arginine and lysine) have been analysed. Quantitative estimation of histones, histone-like and common proteins has been performed by means of the probe spectrophotometer in corresponding wave lengths at the probe size of 1 mkm.

[Experimental-morphological reasons for using dura mater for plastic surgery of defects of the anterior abdominal wall].

A possibility to use preserved dura mater (in 2% formalin) for substituting various abdominal wall layers under both sterile and infectious conditions has been studied experimentally in 126 dogs. Morphological investigation has been performed at various postoperative time (1 day--2 years). It has been stated that the dura mater implantation produces minimal aseptic inflammatory reaction in the abdominal wall tissues.

[Normal 17-day-old human embryo. Qualitative and quantitative characteristics of polysaccharides in developing primordia].

Cytochemical investigation on qualitative composition of polysaccharides in definitive and provisory anlagen of a normal 17-day-old human embryo "Krym" is performed. Basing on cytophotometric data, quantitation of glycogen and glycoproteins in the germ layers, their derivatives and in the chorionic membrane are analyzed. At early stages of differentiation glycogen and glycoproteins are demonstrated to predominate.

[Morphologic characteristics of definitive and provisional structures of normal 17-day-old human embryos].

The structure of the presomite human embryo was investigated at embryogenesis. The embryonic shield is a three-layer gastrula 810 mkm long in the anteroposterior direction and 855 mkm wide (at the level of the primitive nodule). The primitive streak is 200 mkm long; the primitive nodule is well pronounced.

[Experimental morphologic findings serving as a basis for use of xenogenic dura mater for plastic surgery of blood vessels].

Heterotransplants of the human dura mater were used to replace circular and lateral defects of the thoracic and abdominal aortas, carotid and iliac arteries in experiment. Operations were performed in 106 dogs. Observations of permeability of the vessels, morphological and histochemical studies were carried out at different periods after operation (from 1 day to 2 years).