H and13 C NMR spectroscopy of a series of 1-vinyl-2-(2 -heteroaryl)-pyrroles were employed for the analysis of their electronic and spatial structure. The C -H· · ·N intramolecular interaction between the a-hydrogen of the vinyl group and the pyridine nitrogen, a kind of hydrogen bonding, was detected in 1-vinyl-2-(2 -pyridyl)pyrrole, which disappeared in its iodide methyl derivative. It was shown that this interaction is stronger than the C -H· · ·O and C -H· · ·S interactions in 1-vinyl-2-(2 -furyl)-and -2-(2 -thienyl)-pyrroles.

The aim of the investigation was to study the efficiency of determining indices of free radical and peroxide processes in the oral fluid in highly qualified athletes under anaerobic interval exercise for the assessment of their functional state.Materials and Methods. 23 highly qualified athletes at the age of 18.7±0.6 years participated in the study. The following methods were used to investigate homeostasis indices: induced biochemiluminescence, determination of primary and end lipid peroxidation product content according to a modified Volchegorsky method, enzymatic colorimetric method of measuring the concentration of creatinine, lactate, glucose and free fatty acids, enzymatic kinetic method of determining the quantitative activity of creatine kinase and lactate dehydrogenase in the oral fluid.Results. Anaerobic interval exercise is estimated to initiate increase of lactate dehydrogenase activity and lactate concentration, reduction of all parameters of chemiluminescence reaction curve, and elevation of the content of trien conjugates and Schiff bases in the oral fluid of highly qualified athletes.Conclusion. The study of free radical oxidation indices as well as the content of primary and end products of lipid peroxidation is an available, highly informative method of examining the functional state, adaptive mechanisms, and spare capacities of athletes at all stages of training and competitive processes.

The sea ice in the Arctic has shrunk significantly in the last decades. The transport pattern has as a result partly changed with more traffic in remote areas. This change may influence on the risk pattern. The critical factors are harsh weather, ice conditions, remoteness and vulnerability of nature. In this paper, we look into the risk of accidents in Atlantic Arctic based on previous ship accidents and the changes in maritime activity. The risk has to be assessed to ensure a proper level of emergency response. The consequences of incidents depend on the incident type, scale and location. As accidents are rare, there are limited statistics available for Arctic maritime accidents. Hence, this study offers a qualitative analysis and an expert-based risk assessment. Implications for the emergency preparedness system of the Arctic region are discussed.

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A complete analysis of the 1 H and 13 C spectra of the representative series of heteroaryl vinyl ethers and sulfides and heteroaryl styryl sulfides was carried out. The electronic and spatial structures of these compounds are discussed. It was shown that the C -H· · ·N intramolecular interactions in the investigated molecules influence significantly the spectral parameters and the conformational equilibrium.

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As network data rates increase, so does the spread of virtualization. Each type of cloud fits better or worse to a certain task. The paper details the major types of clouds currently in use and their deployment models. The paper can be useful to both simple users and information security professionals to deploy both private home family clouds and cloud computing systems of large corporations.