03.00.00 Biological sciences
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Description
The article gives the estimation of the influence of Agro industrial complex on the state of small water basins. Hidrochemical and microbiological researches of rivers at their main stages of water regime were conducted. Seasonal fluctuations of main polluting substances were revealed. For microbiological estimation of the water quality in investigated water basins, there was done the calculation of the total quality of microorganisms. At the same time, a quality control of sanitary demonstrative microorganisms was done
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Description
The article demonstrates the taxation parameters of the pine plantations that was damaged by fire in 2010 in Suburban forestry of the Voronezh region and was calculated the basic ecological functions they performed before death. The intercommunication was found between increasing level of air pollution in the study areas and growing of heart and pulmonary morbidity of population
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Description
Qualitative and quantitative composition of the low-molecular carboxylic acids (CA) which were contained in the cultural liquid (CL) of the four strains of Escherichia coli and Salmonella enteritidis var.Issatchenko was investigated. The differences in the composition of the CA were shown, their dynamics during the bacterial growth and their total concentration in CL were strain specific characteristic. The differences in the composition and dynamics of the CA, which are specific only to probiotic and opportunistic strains were revealed
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Description
The historical and geographical information of peste des petits ruminants and the characteristics of its agent are given, also some epizootological features of the infection are described, and PPR specific prophylaxis and control measures are discussed
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Description
The article presents monitoring of the course and the beginning of new invasions due to the intensification of these processes in the basin of the Azov Sea of; investigation of the influence of the alien species upon the acceptor ecosystem. Methods. The material was collected at the monitoring transect in the Don River delta and in the surveys of the r/v “Professor Panov” in the Taganrog Bay, Sea of Azov. Standard hydrobiological methods of the data collection were used. Results. Penetration of three polychaete species was recorded; course of invasion of two of them was traced. Impact upon the acceptor ecosystem was researched. Preliminary species identifications using morphological characters were carried out; sources and the ways of the invasions are suggested. Conclusions. Estuary zone of the Sea of Azov (the Taganrog Bay) has a high invasion capacity. Of the three species penetrated into the Sea of Azov basin in 2013-2015, one (Aracia sp.) naturalized successfully, though didn’t affect much the ecosystem. On the contrary, polychaetes of the genus Marenzelleria are increasing rapidly their area; in two years, they became dominant along the considerable part of the water body. The invasion of Streblospio sp. is at its very beginning at the time
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CYCLICAL EFFECTS OF ACTINOMYCIN D ON THE BARLEY COLEOPTILES GROWTH
DescriptionIn cell biology, actinomycin D is shown to have the ability to inhibit transcription. Actinomycin D does this by binding DNA at the transcription initiation complex and preventing elongation of RNA chain by RNA polymerase. When soaking the seeds in a solution of actinomycin D, antibiotic blocks RNA synthesis and seed germination occurs at the expense of long-living RNA, available in the mature seed. In the article we present experimental data indicating that as storage seeds of winter barley are changing the action actinomycin D on the growth of coleoptiles. It is shown that actinomycin D at a concentration of 40 µg/ml in October reduced the growth, in December it was not authentically, and in February it was paradoxical amplified growing coleoptiles. We suggest the part of the actinomycin D fastened with growth inhibitor coleoptiles, whose structure changes during seed storage and increase the affinity of actinomicyn D to the inhibitors. At a concentration of 60 µg/ml actinomycin D effectively reduced of the coleoptiles growth. Suppression of seedlings roots growth was proportional to the concentration of the actinomycin D and exposure time
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Description
The article presents the results on the effects of Imazethapyr herbicide on aquatic organisms. The chronic toxic effects have been studied of the imidazolinone herbicide in a concentration range of 0.4 - 1150 mg/l to the representatives of various groups of aquatic organisms: zoobenthos – great ramshorn snail (Planorbarius corneus), zooplankton - Daphnia (Daphnia magna Straus), phytoplankton - protococcal alga (Scenedesmus guadrigauda) and macrophytes - higher aquatic vegetation (Elodea canadensis Michx). It is shown that the herbicide does not have a pronounced lethal effect to aquatic organisms tested. Their respective LC50 values are > 1000, 680, 510 and 910. Elodea is shown to be most sensitive to its sublethal effects (decreased growth of lateral and main sprouts at a concentration of 10 mg/l and more), reduced fertility was observed in Daphnia at a concentration of 300 mg/l and above, and as to the great ramshorn snail no sublethal effects have been revealed for all the concentrations studied
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CHOROLOGICAL ANALYSIS OF DIPTEROFAUNA OF KAMYSHANOVA POLYANA LANDSCAPE NATURE RESERVE
DescriptionThis article presents the data of chorological analysis of the flies’ fauna (Insecta, Diptera) of the Kamishanova Polyana Nature reserve. The analysis of distribution of 432 species of the reserve allowed to identify the 4 groups and 16 types of areals
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Description
There are comparative characteristics of agronomic biological qualities of bulls of Kazakh white and Kalmyk breed and their crosses
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Description
Phytocenosis of the oak durmast and english oak on southern and northern exposition are studied and compared