[Comparative characteristics of the activity of enzyme systems for nitrogen metabolism in the liver of human fetuses during embryogenesis].

The activities of alanine aminotransferase (ES 2.6.1.

[Amino acid metabolism in the human placenta during its functional maturation].

The total content of free amino acids in chorion villi of the 7-40-week human placenta rises from 41 up to 71 mg%, which is mostly due to an increase in the content of replaceable amino acids. In the process of development the intensity of glutaminic acid desamination changes essentially and correlates with changes in its content in the placenta. The aspartate and alanine aminotransferase activity in the placenta during the period under study rises almost twice, that correlates with changes in the content of alanine, glutaminic and asparginic acids in the corresponding periods of development.

[Nitrogen metabolism in salmonellosis in man and animals].

The data obtained make it possible to understand more clearly some aspects of pathogenesis of salmonollosis bacterium carriage and testify to the fact that disturbances in nitrogen metabolism in tissues are essential in development of its different morphological and clinical manifestations.

[Formation of some enzymic systems in the human fetal brain during development].

The data of studies in the monoaminoxidase, nuclease and transaminase activity in fractions of mitochondria and nuclei of the human fetus brain in the process of the fetus development evidence for the changes in the activity depending on the morphological and functional maturation of the organ during the antenatal ontogenesis. The monoaminoxidase activity increases by the time of birth. By the 40th week of development the activity of glutamic-aspartic transaminase increases as well.