Comparative evaluation of morphofunctional organization of nucleated blood cells of vertebrate animals

Morphometrical parameters, osmoregulatory possibilities, and the value of membrane reserve of nucleated hemocytes (leukocytes and erythrocytes) of the main vertebrate animal classes were studied with use of the method of hypoosmotic loadings. It has been established that in erythrocytes, in the fish??mammal row, the absolute reserve of plasmalemma increases, while the relative area of the cell surface decreases. Evolution of leukocytes is accompanied by an increase of the membrane reserve and the surface area at the expense of a decrease of the volume and a rise of folding of the plasmalemma.     

Modelling of the effects of Na+ and Ca2+ ions on the generation of action potentials by rabbit heart true pacemaker cells

A comparison of results of modelling and physiological experiments allowed to estimate in the first approximation the quantitative contribution of calcium and sodium ions to the generation of different ionic currents determining the shape of the action potential (AP). Generally, the model reproduced adequately variations in AP shape with changes in the external concentrations of Na+ and Ca2+. At the same time the model differs slightly from the experimental results. To improve the model kinetic variables of slow inward current have to be taken into account.     

Induction of CAM Photosynthesis in Hylotelephium triphyllum (Haw.) Holub (Crassulaceae) under Climatic Conditions of the European Northeast of Russia

Russian Journal of Plant Physiology - Seasonal and diurnal changes in cell sap titratable acidity, the content of organic acids, and phosphoenolpyruvate (PEP) carboxylase activity in leaves of...     

Immunomodulating peptides, regulation of interleukin-2 expression and its possible mechanism]

The influence of some immunomodulation peptides SKD, R and L on the interleukin-2 (IL-2) synthesis in T-lymphocytes and possibility of their specific interaction with nucleotide sequences of IL-2 gene were studied. It was firstly shown that peptides R and L specifically interacted with regulatory nucleotide sequences of IL-2 gene and, possibly, play a key role in the immunomodulation actions on the IL-2 production.