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METHODOLOGY FOR STUDYING FOULING IN THE COASTAL WATERS OF THE BLACK SEA AND EXPEDITION RESEARCH IN THE ATLANTIC AND INDIAN OCEANS

The monograph is devoted to methodological approaches in the study of fouling of various anthropogenic surfaces in the coastal waters of the southwestern shelf of the Crimean Peninsula. Attention is paid to the study of the effectiveness of various antifouling compositions with the complex use of physical, chemical and microbiological methods. The processes of biodegradation in seawater of organic components of various paint and varnish materials as a result of the vital activity of a community of peripheral microorganisms are considered. The possibilities of studying the fouling of various shipbuilding materials and structures in oceanic expedition conditions.

Suspended sediment in lowland rivers – towards identifying the ratios of mineral and organic components and their variation during the year

Concentrations of suspended sediment transported by rivers are influenced by interactions between multiple drivers that act on a range of spatial and temporal scales. Such levels vary over the year, as well as across multi-year periods. Most conventional approaches to determining suspended load are based upon analyses of total suspended sediment concentration (SSC), i.e., the sum of mineral and organic matter. This approach makes it difficult, if not impossible, to determine the impact of multiple environmental factors on changes in suspension concentration precisely. The present paper focuses on the mineral and organic components of suspended sediment with the aim of determining how our knowledge of the share of each individual component can improve interpretations of SSC fluctuations during a hydro-logical year. The analysis conducted (personal and other researchers’ results) has shown that mineral and organic suspensions demonstrate mutually incompatible opposite trends under influence of environmental factors. This analysis of organic components identifies clear seasonal trends, which indicates that organic suspensions of autogenous origin have a strong influence on the dynamics of changes in suspension concentration; such analyses are rarely included in assessments of SSC dynamics.

Spectral analysis of juvenile dentin biomaterials

The experiments in optical evaluation of biomaterials taken from juvenile dentin have been made using the Raman spectroscopy method. It was shown that juvenile teeth lose their mineral components and preserve organic components in the process of demineralization with the use of hydrochloric acid.