[Assessment of changes in the parameters of the quality of life of children aged 14-15 years with chronic catarrhal gingivitis after a complex of therapeutic and preventive measures].

The Purpose Of The Study: To assess changes in the parameters of the quality of life of children aged 14-15 years with chronic catarrhal gingivitis after the implementation of a complex of therapeutic and preventive measures.

Materials And Methods: The study involved 2 groups of children aged 14-15 years: group 1 - 60 children with chronic catarrhal gingivitis, group 2 - 60 children without signs of periodontal tissue damage. In 1 group of children, a complex of therapeutic and preventive measures was carried out for a month.

[Ways of solving the problem of dentin hypersensitivity in children after professional oral hygiene].

Aim: To design an algorithm of decreasing dentin hypersensitivity in children after professional oral hygiene.

Methods And Materials: Intact teeth extracted for orthodontic reasons in children and adults were involved in the pilot study. The enamel surface was cleaned by manual instruments and then polished with polishing pastes containing sodium bicarbonate, fluoride, calcium and phosphates.

[Diversity and Physiological and Biochemical Properties of Heterotrophic Bacteria. Isolated from Lake Baikal Neuston.].

For heterotrophic microorganisms (44 strains) isolated-from the surface film of Lake Baikal, iden- tification was carried out and their. physiological and biochemical characteristics were determined. Com- pared to the water column, diversity of cultured heterotrophs was low, indicating formation of stable micro- bial communities at the air-water interphase interface.

[Resistance to Dehydratation of Extremophilic Bacteria from Antarctic Region and Hypersaline Reservoirs].

Purpose: To determine resistance to dehydratation of bacteria resistant to UV irradiation.

Methods: Objects of research - extremophilic bacteria (from Antarctic islands and hypersaline reservoirs of Israel and Crimea). Dehydratation of bacteria was carried out in sealed desiccator; the exposure without access of moisture was 5 weeks, temperature - 22 - 25 °C, humidity - 1 - 4 %.

PHYLOGENETIC ANALYSIS AND AUTECOLOGY OF SPORE-FORMING BACTERIA FROM HYPERSALINE ENVIRONMENTS.

Multi-resistant to extreme factors spore-forming bacteria of Bacillus genus are isolated from hypersaline environments of the Crimea (Ukraine) and the Dead Sea (Israel). Phylogenetic analysis showed distinction of dominating extremophilic culturable species in studied regions. In Crimean environments they are B.