[Application of the new culture medium for the isolation of Salmonella from water bodies to assess the epidemic safety of water use. Gigiena i Sanitaria (Hygiene and Sanitation, Russian)].

There was developed a liquid storage medium for the isolation of bacteria of genus Salmonella from water bodies (The culture medium for the accumulation of Salmonella, ready to use, "RNS"), providing the accumulation of Salmonella from different serogroups, inhibiting the growth of accompanying microflora, allowing to obtain objective information about the extent of bacterial contamination of water bodies. Medium is by nature of a solution for microbiological purposes which is produced by mixing the components with consequentfiltration and sterilization. In an experimental way there were chosen optimal ratios of the nutrient medium ingredients: extract offodder yeast in an amount of 4.55.0 g/l, sodium hydroxide - to 1.3-1.4 g/l, potassium phosphate - 8.6-8.8 g/l. The medium is a sterile, clear liquid, green in color, medium pH is 6.4 to 6.8, amine nitrogen - from 0.05 to 0.1%. Designed medium for accumulation is sensitivity, it ensures the growth of the test strains of salmonella at seeding of single cells in that favorably differs from similar media used in public health practice at the present time. The smallest time for the accumulation of biomass of Salmonella accounts of 6 hours, the optimal time is 24 hours. Incubation of crops is produced at 37 °C. Cultures of Salmonella at seeding in the developed medium retain their biological properties. Developed medium in terms of sensitivity is superior to magnesian and selenite media.

[Gas chromatography-mass spectrometric studies of volatile emissions from plants for the assessment of the effectiveness and chemical safety of the implementation of environment improving phytotechnologies].

The chromato-mass-spectrometric studies of volatile emissions of fresh-cut roses have revealed the persistence of wide range of organic compounds. The most large content was consist of terpene hydrocarbons. The contribution of oxygen-containing components (alcohols, ethers, aldehydes and ketones) varied in wide ranges in dependence on the content of the feeding solution. The significant part of plants ' volatiles has no hygienic norm. Among the substances released into the air space ofpremises with volatile emissions ofplants, a significant part has not hygienic standards. Purposeful change in composition of the mixture of volatile organic compounds released by the plants, in the combination with chemical-analytical control of the content of these substances by gas chromatography-mass spectrometry in terms of ecological and hygienic aspects may be useful in the development, use and determination of the optimal conditions of the implementation of environment improving phytotechnologies and evaluation of the efficacy and safety of their impact on public health.

[Electronic deficit as a possible health risk factor].

There is presented the analysis of medical-demographic situation in Russia, and the increase in population mortality is shown both to be associated with the degradation of the geosphere and alongside with other factors determined by the change in the electronic state of the environment. On the base of the interrelationship between the electronic saturation of the environment and an increase in population mortality and morbidity there is established a such risk factor for human health and life, which may currently become one out of significant, videlicet, the electronic deficit. In conditions of its appearance there are proposed options solving this problem by means of elaboration of the scientific rationale for the impact of the electronic deficit on the human organism and the creation of technologies providing environmental--medical safety of the population by virtue of the correction of the electronic state of the human habitat, food and drinking water and the implementation of the system for monitoring electronic abundance of the environment.

Scientific basis for the study of demineralization of highly mineralized water for use in public water supply systems.

New criteria (full physiological value and preservation of the properties of drinking water) are scientifically substantiated. Also discussed are indices (minimal admissible and optimal levels of basic water mineralization and calcium content, standards of microelements such as boron and bromine content, content of individual groups of microorganisms, water temperature) for evaluating the quality of demineralized water obtained from brackish and briny water (including water from the sea and ocean) by various methods which are designed for public water supply systems. Research results served as the scientific hygiene basis for the development of a new technology of obtaining drinking water. The necessity for developing a special quality standard for demineralized drinking water is shown.