This study describes the laboratory evaluation methodology of the drag reducing effect of block poly-1-octene. Poly-1-octene, synthesized in our laboratory was chosen as an object of the present study. To confirm the nature and the structure of the obtained polymer its FTIR spectrum was registered. The molecular mass was determined by viscosimetric method using an Ubellode viscosimeter, the obtained value was 5.22?10{6}. Hydrodynamic testing of poly-1-octene solutions has been performed using a capillary rheometer of our own construction for the quantitative estimation of the polymer's drag reduction capability. We introduce criterion for a quantitative estimation of a polymer hydrodynamic drag reducing capability. This is a semi-effect concentration С[1/2] that can be determined using a dependence of DR on the concentration
Introduction. The article “Hygienic rationale for the use of specialized food products in the diet of athletes” is presented on the issue of the hygienic justification for the use of specialized food products of domestic and foreign production in the nutrition of athletes that promote their adaptive capabilities to physical and neuro-emotional stress and achieving high sports results that must meet hygiene safety requirements and nutritional value established in the Russian Federation by the sanitary rules and regulations and the technical regulations of the Customs Union and EurAsEC. Material and methods. Specialized food products for the nutrition of athletes are allowed for production, storage, transportation, and sale after their state registration on the basis of the results of the hygienic assessment of the quality and safety of products in accordance with existing regulatory documents. Results. The balance of nutrients, the given nutritional and energy value, allowing to carry out the metabolism with maximum directed efficiency, is the main characteristic of the products of sports nutrition. To confirm the effectiveness of protein-carbohydrate products, studies were conducted on the basis of the Moscow Region team of bodybuilding and fitness with the methodological support of the Moscow Bodybuilding Federation and Fitness Federation. Discussion. The hygienic evaluation of specialized products for nutrition of athletes is carried out within the framework of the sanitary and epidemiological expertise for compliance with regulatory requirements for the quality and safety of the current technical regulations of the Customs Union, as well as relevant regulatory legal acts. Conclusion. It is necessary to further improve the regulatory framework governing the production, storage, transportation, sale, quality and safety of specialized food products for athletes; to development a scientific methodology for the risk management in the system of ensuring the safety and quality of food for athletes, including their analysis, identification and evaluation; the conformity of the structure of nutrition and the developed rations to physical and emotional loads of sports activities, the individual physiological characteristics of each athlete and the modes of sports training.
The article is devoted to the study of the nature of the toxic effects of a new complex organic mineral fertilizer on the organism of laboratory animals. The assessment of its toxicity and hazard has been performed with the definition of acute and subacute toxicity parameters, as well as irritant effect on skin and mucous membranes, sensitizing and cumulative effects.
The review summarizes the directions of the results of scientific activities of the Department of Food Hygiene of the Federal Scientific Center for Hygiene named after F.F. Erisman of the Federal Service for Supervision in Protection of the Rights of Consumer and Man Wellbeing. Since the day of its foundation, the employees have been working on the examination of food products, the development of methods for the study of food and ready-made meals, the prevention of food poisoning of bacterial and non-bacterial aetiology, as well as the hygienic assessment and control of the produced utensils and containers. Based on the department, capital studies were carried out to study and rationalize the nutrition of certain groups of the population: industrial workers (engaged in the development of coal mines, working at metallurgical and mining enterprises, etc.), children and adolescents of various institutions. The article highlights the main directions of work on the study and development of methods for hygienic and chemical research of public catering and food industry products, on the hygienic assessment of pesticides and new methods of food processing technology. Attention is paid to studies on establishing migration patterns and deciphering the mechanisms of biological action of toxic substances released from materials in contact with food. A significant contribution was the scientific substantiation of hygienic food system optimization using preventive foods for contingents of persons in extreme environmental conditions, including astronauts. The result of the research was the development of medico-biological requirements for specialized products intended for feeding people in extreme conditions of space flight and wounded with damage to the skeletal system. The works of the outstanding employees of the department have made a significant contribution to the science of hygiene and sanitary practice.
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