Биология

The strength and the specific featu res of the vasomotor responses provide important information about the healthy state of the blood vessel, since it s contraction or dilation is caused by the activation or relaxation of vascular smooth muscle cells of the vascular wall and appears to be a universal response to the a number of physiological regulatory pathways, including humoral and neurogenic ones.

In the article results of use of Malaise trap for the study of the beetles local fauna (Insecta: Coleoptera) in the territory of National Park «Khvalynsky» is given. Compiled a list of 95 species from 32 families Coleoptera. Antherophagus pallens (Linnaeus, 1758) and Saperda octopunctata (Scopoli, 1772) are recorded for Saratov region in first time.

The suprachiasmatic nucleus generating biological circadian rhythms in mammals and humans, contains a high proportion of neurons, producing arginine-vasopressin. In in vitro experiments on hypothalamic slices of rats, the comparative analysis of the effect of 20 nM argininevasopressin on the spike activity parameters of neurons with regular (n =23) and irregular (n=28) activity in the suprachiasmatic nucleus was performed.

Sorptive properties of a natural mineral glauconite towards methylene blue were studied and a composite of both substances was obtained. Antibacterial activity of the composite has been assessed against Staphylococcus aureus FDA 209P. An enriched fraction of natural glauconite was obtained by method of magnetic separation. Surface morphology of the glauconite was examined with scanning electron microscopy. The elemental composition was investigated using energy-dispersive microanalysis and roentgen fluorimetry, the texture – using Brunauer–Emmett–Teller analysis.

The results of long-term studies of the ability of the inbred population of Drosophila melanogaster living in a vegetable store to adapt to the genotoxic effect of a half-lethal dose of benzotriazole are presented. A part of the imago was taken from the population, afterwards they were bred on a standard fodder used for the Drosophila laboratory lines, this was done every ten years from 1980 to 2010. Female and male imago were separately subjected to a single exposure to benzotriazole in a semi-lethal dose.

Dynamics and current state of cyclostomes and fish fauna of Saratov region is analyzed, on the basis of modern field research, collectible information and literature data. As a result of regulation of large and small rivers of the region, a significant restructuring of their ichthyocenoses took place. The overall index of changes in the species composition of the ichthyofauna was 49%, the final list (at the end of the observations) was 42%, and the index of intrapopulation changes was 51%.

In the article the results of short-term investigations of water-land biotopes of the natural monument «Rasskazan’ Lake» (Balashov district of the Saratov Province) is presents. Compiled a list of 67 species from 9 families Coleoptera.

Isolated exopolysaccharide Streptococcus thermophilus. The conditions for the cultivation of bacteria for the maximum yield of the exopolysaccharide were selected. The bacterial culture of S. thermophilus was incubated for 48 hours in a liquid nutrient medium A. Welman at 38 °C, 180 rpm. on a thermostated shaker-incubator. As a source of carbon were used: sucrose, lactose and glucose. For the production of exopolysaccharide, the best source of carbon was sucrose. Isolation of the exopolysaccharide was carried out according to the J. Cerning method in our modification.

5 species of millipedes, 12 species of geophilomorph centipedes, 3 species of scolopendromorpha centipedes, 11 species of lithobiids and 1 species of scutigeromorph centipedes are listed for the territory of the Lower Volga region (in the limits of Saratov, Volgograd, Orenburg and Astrakhan regions and Kalmyk Republic) as a result of processing of collection materials kept in ZM MSU, ZIN RAS, collection of the Department of Biology and Chemistry of the UlSPU and of the Department of Animal Morphology and Ecology, Saratov State University, and exploring of literary sourc

To protect bread wheat from rust diseases, introgressive resistance genes located in alien translocations are commonly used. In the literature there are no data on the effect of Lr-genes on the structures of the embryo grain. For the solution of these problems, developed lines Dobrynya, resistant to leaf rust. In work results of research of the anatomic-morphological structure of the grains wheat Lr-genes of resistance to leaf rust.