Biology

The Study of Antibacterial Properties of Coatins Based on Metal (Ag, Zn) Nanoparticles in Silicon Dioxide Matrix

The influence of coatings on the basis of Ag and Zn metal nanoparticles in a silica matrix in combination with ultraviolet (365 nm) radiation on Staphylococcus aureus 209 P bacteria was studied. It was shown that the investigated coatings without access to light inhibit the growth of microorganisms by 45% after 3 hours of incubation and 55–70% after 5 hours of incubation. Enhancement of antibacterial properties of nanocoatings was achieved by exposure to UV (365 nm) radiation. The decrease in the number of studied microorganisms was noted by 75% after 30 min of exposure.

A Study of Iron-oxidizing Microorganisms for Possible Use in Biotechnology of Water Purification

The ability of a variety of bacteria isolated from soil samples with high levels of magnetism of the city Mednogorsk to oxidize iron (II) in conditions of periodic cultivation in a liquid medium was studied. Investigating the increase in total biomass using its wet weight and analyzing its absolute bacterial biomass growth after 7 and 14 days of cultivation resulted in the identification of two microbial isolates with maximum growth rates. The wet biomass weight of these isolates (69.3 and 69.5) was 15.3 and 14.7 g/l after 14 days of cultivation.

Selection of Chrysanthemum coreanum in the South-Ural Botanical Garden

In article results of selection work on creation of new sorts of Chrysanthemum coreanum in Ufa botanical garden are explained, descriptions of 10 local new sorts are also provided. Their biometric parameters, decorative indexes and terms of blossoming are specified. The Chrysanthemum genus belong to Asteraceae family. Ch. coreanum – hybrid origin, a perennial plant with reinforced, more or less branched rhizome.

The New Finds of Spiders (Arachnida: Aranei) in the Volga Region Forest-steppe Zone

We present the data on six spider species of 6 families has collected in the forest-steppe zone of Samara-Volga region. This paper was compiled from field gathering conducted in the Samara region during 3 years, and starting from 2004.

Study of influence of Film Coatings on the Basis of Exopolisaccharides of Lactic Acid Bacteria on the Healing of Burns in Rats

Was studied the influence of film coatings, created on the basis of exopolysaccharides (EPS) of lactic acid bacteria Lactococcus lactis B-1662 and Streptococcus thermophilus, on the healing of burn wounds in female rats. It has been established that film coatings contribute, albeit to varying degrees, to the healing of burns of grade IIIa in rats. The application of film coatings to the burn site was carried out immediately after the burn was reproduced and then daily for 28 days.

Features Nutrition of Ants of Formica Genus (Hymenoptera, Formicidae) in the Forest Biotopes in the Vicinity of Saratov

Ants are essential component of ecosystems. They participate in soil formation, regulate the number of insects and spread the seeds of plants. The species of the genus Formica are most noticeable in the forests of the middle zone of Russia. The number and diversity of the prey of ants decreases in the areas experiencing a recreational load. To study the feeding characteristics of ants food objects brought in the anthill were seized. Invertebrates from 12 taxonomic groups were recorded in the prey.

Influence of Lr-genes on Сharacteristics of Wheat Grain Structure

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. The differences between the lines with the translocations on the main embryonic structures grain: the shield, the coleoptiles and the embryonic leaves.

New for a Fauna of the Lower Volga Species of Centipedes and Millipedes

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 sources.

The Influence of Culture Conditions on Production of Exopolysaccharide of Streptococcus Thermophilus

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.

The Preliminary Data about Spring Beetles Fauna (Insecta: Coleoptera) of the Natural Monument «Rasskazan’ Lake» (Saratov Province)

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. 8 spesies – Chlaenius nitidulus (Schrank, 1781), Demetrias monostigma Samouelle, 1819, Agonum versutum Sturm, 1824 Pterostichus ovoideus (Sturm, 1824), Lathrobium brunnipes (Fabricius, 1793), Stenus similis (Herbst, 1784), Plateumaris sericea (Linnaeus, 1761) and Notaris acridulus (Linnaeus, 1758) are recorded for the Saratov Province in the first time.

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