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This article presents the results of microbiological tests of soils in emergency oil and gas facilities in Yakutia. The author found that in the process of self-healing soil is not sufficiently cleansed of hydrocarbon contamination and are in the environmental stress. The signs of soil degradation are thinning or absence of vegetation, phytotoxicity, changes in physical and chemical properties of the soil: formation of lumpy soil structure, hydrophobicity, salinity, high pH values, lack of available phosphorus, nitrate nitrogen, ammonia nitrogen, phytotoxicity.

When teaching chemistry, the most natural is to use the computer, based on the characteristics of chemistry as a science. The computer ис necessary, firstly, to simulate the chemical processes and events, laboratory усе in interface mode, computer support presentation of new material and control process of its absorption. Simulation of chemical processes and phenomena on the computer, is especially needed for the study of phenomena and experiments that are almost impossible to show in the school lab, but they can be displayed on a computer. Application of computer models can reveal essential links of the studied object to reveal its laws, which leads to a better absorbation of the material. A student may explore the phenomenon by changing its settings, compare the results, analyze, draw conclusions. For example, setting different values ​​for the concentration of the reactants (in a program that simulates the dependence of the chemical reaction rate on various factors), a student can follow the change in the volume of gas evolved, and so on

This article analyzes the spread of goiter in the dog population of the Astrakhan region. The authors give the main clinical signs of the disease and the method of hypothyroidism correction.