The history of the Kazan hygienic school should begin not with the organization of the Department of Hygiene (1869), but much earlier - with the foundation of the Faculty of Medicine.
The XXVI Congress of the CPSU defined the current national economic problems of the 1980s and the XI Five-Year Plan. As the General Secretary of the Central Committee of the CPSU, Chairman of the Presidium of the Supreme Soviet of the USSR Comrade LI Brezhnev noted, "our country has entered a new decade, making it the main task to ensure the further growth of the welfare of Soviet people." The program for improving the well-being of the people in the XI Five-Year Plan provides for the solution of the housing problem, improvement of working, living and recreation conditions. Caring for the health of Soviet people in the coming years remains one of the most important social tasks.
Defining the content of the concept of "malignant tumor", the founder of Soviet oncology NN Petrov (1959) wrote that this is "... a dystrophic proliferative reaction of the body to various harmful external and internal factors that persistently disrupted the composition and structure of tissues and cells and changed them exchange". In this definition, in essence, the basic principles of combating cancer incidence are laid.
Due to the fact that carcinogenic N-nitrosamines have the ability to be synthesized both exogenously and endogenously from the so-called precursors (nitrites, nitrates, secondary amines), a study was carried out of drinking and waste water, as well as some products in samples taken in a number of areas of the Upper Volga basin. The amount of nitrites that a person can get from drinking water and food containing precursors of N-nitrosamines has been calculated.
Under the conditions of the modern scientific and technological revolution, the rapid development of industry, transport, agriculture, growth and development of cities is often accompanied by changes in the natural environment towards its deterioration. This is evidenced by the data characterizing the state of the environment in many cities of our country. In some industrial centers and cities, despite the measures taken in recent years, the environment continues to be polluted by emissions from various enterprises, thermal power plants, transport. Of particular concern is the harmful effect of various environmental factors on the health of the population and their living conditions.
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