South Federal University
Author list of organization
List of articles written by the authors of the organization
-
DYNAMICS OF ENZYME’S ACTIVITY OF BLACK SOIL WHEN POLLUTING WITH ANTIBIOTICS
06.00.00 Agricultural sciences
DescriptionIn the article, we have studied the effect of antibiotics on enzyme’s activity of black soil. Introduction of the high doses (600 mg/kg) of antibiotics benzylpenicillin, nystatin) leads to considerable decrease in enzyme’s activity of soils. The class of hydrolyses is most sensi-tive to the action of antibiotics, their activity decreases for 50-70% from control values, the class of oxidore-ductase is least sensitive (10-40%). Antibiotic’s action on enzyme’s pool of soils has the prolonged character
-
DYNAMICS OF RESTORATION OF BIOLOGICAL PROPERTIES OF BLACK SOILS POLLUTED WITH OIL
DescriptionNegative impact of oil on biological properties of soils right after pollution is shown in the article. Eventually, there is their restoration. However, even in some years after pollution, the biological properties of soils aren't restored completely
-
ECOSYSTEM DEGRADATION OF THE LIMESTONE MASSIFS OF WESTERN CAUCASUS AFTER DEFORESTATION
DescriptionSignificant changes in mountain ecosystems occur after deforestation on limestone massifs of the Western Caucasus. Tall-mountain-meadow vegetation with a large variety of species formed at low and medium soil disturbance 3 years after logging. Physical and biological properties of calcareous soils also vary greatly. The values of biological activity decrease at the maximum load is more than 10 times. Biological activity is increased by 20-50% or more cutting stations with low disorders. Biological properties of soils (especially the enzymatic activity) are very sensitive indicators of changes that have occurred as a result of logging. Changes in the activity of soil hydrolases different from changing oxidase activity at different times after logging
-
POSSIBILITIES OF THE EVOLUTION OF SOFTWARE SYSTEM OF MANAGEMENT DECISIONS SUPPORT
DescriptionThe article discusses the implementation of a software system to support management decisions designed to organize the educational process in higher educational institutions. We have completed argumentation of the development and application of a software system. This system was developed in the department of the computer engineering of Institute of computer technologies and information security, Southern Federal University (SFeDU). The article describes the algorithm of functioning of the system and its structure. The software system includes several subsystems and three external modules: "Personal load", "Materials to the schedule", "Work Plan of the Department". It provides basic information about the developed modules, discusses their purpose and functionality. Initial data for modules were defined. The results of the work of modules are confirmed by illustrations. The article describes the work of the subsystems composing the software system. These are a subsystem of data processing, a subsystem of decision-making and a subsystem of input/output. The structure of all subsystems is detailed at the block level, the purpose of blocks was determined. Resulting files of the module work are generated in an XML-format and can be converted into an Excel-format that considerably facilitates a task of their subsequent use and processing. The system and the additional module possess the convenient functional interface and, considering facilities on adjustment for the concrete user, can be used in structural divisions of various universities
-
INFLUENCE OF MALIGNIZATIONS LEVEL OF ASTROCYTIC HUMAN BRAIN TUMOR ON THE EXPRESSION OF CONNEXIN-43
DescriptionStudy was performed on 12 samples of astrocytic human brain tumors, which differ by the level of malignancy and histological indications. The study was conducted with the method of immunohistochemistry using a commercially available antibody anti-connexin-43 (Cx 43), a prior test of which was carried out on myocardium tissue of rats (positive control). The study showed that with the increasing of malignant level of astrocytomas, there was marked the decreased level of connexin-43 expression of, which is apparently to be associated with the destruction of intercellular gap junctions in tumor tissue
-
CHANGE OF BIOLOGICAL ACTIVITY OF SOILS OF NORTH CAUCASUS IN RELATION TO CLIMATE
04.00.00 Geological-mineralogical sciences
DescriptionClimatic conditions have considerable impact on biological properties of soils of the South of Russia. From all studied indicators the most dependent on climate there was maintenance of a humus and activity of polyphenoloxidases and peroxidases. Values of the integrated indicator of a biological condition (IIBC) on a profile of soils decrease in process of increase in an amount of precipitation, decrease in temperature, and increase in height of the district in next order: meadow subalpine → brown forest → gray forest → black leached soil → black typical soil → black ordinary soi
-
Description
In the model experiments we studied the effect of combined action of chemical pollutants (PbO 1,000 mg / kg oil 5% by weight of soil) and microwave radiation (SHF radiation) with a capacity of 450 and 800 W (duration 1 minute) on the enzymatic activity, the number of microorganisms and indicators of phytotoxicity of an ordinary black soil. We found that the combined effect is systemic, rather than a simple summation of the effects of individual pollutants, shown no direct proportion between the power of the microwave radiation and its biological effect in the combined pollution
-
Description
In the article we have investigated the influence of nickel oxide in the amount of 100, 1000 mg/kg of the soil (1, 10 MPC), combined with the influence of an alternating magnetic field of induction of 50, 100 and 650 µT power frequency of 50 Hz on the biological properties of alkalinity black soil
-
Description
We have investigated the influence of nickel oxide in the amount 100, 1000 mg/kg of the soil (1, 10 MPC), combined with the influence of variation magnetic field with induction of 50, 100 and 650 μT power frequency of 50 Hz on the enzyme activity and phytotoxity of the southern chernozem. We have established significant reduction of enzyme activity of catalase and length of roots after the influence of the variation of magnetic fields. Pollution by nickel as an independent factor caused stimulation of enzyme activity of a dehydrogenaze and length of roots of radish. The greatest inhibition of the activity of all indicators was observed at joint influence of magnetic fields and pollution by nickel of concentration of 1 maximum permissible concentration (1 MPC). Enzyme activity of dehydrogenaze was significantly stimulated (p
-
EFFECT OF RECREATIONAL LOAD ON SOIL RESERVE “UTRISH”
04.00.00 Geological-mineralogical sciences
DescriptionThe original soils were investigated at the Black Sea coast of Russia. Severe degradation of the soil in a Utrish nation reserve were identified as a result of high recreational pressure. Soils with high recreational load have low humus content (2-3 times) and a lower en-zymatic activity than the control of the soil. Biological parameters can be successfully used for environmental monitoring of soil of Utrish reserve, in contrast to the chemical and physic-chemical properties