[Cardiovascular performance in Yamal adolescents in adapting to academic activity].

The combined use of cardiointervalography and an orthostatic test allows detailed assessment of the adaptive capacities of the cardiovascular system. The paper gives the results of examination of 60 healthy adolescents from Yamal. Adjustment mechanisms have been assessed by means of hemodynamic parameters in boys and girls.

[An academic process and children's health status in the Far North].

The authors examined 210 children aged 11-12 years for the impact of an academic process on the mental and physical health of pupils. The children were from two schools: a school with a physicomathematical bias and a general educational school. The anxiety of the children from these schools and their physical health were evaluated. The mental and physical health has been found to be currently characterized by negative trends. However, the situation is much worse at the physicomathematical school than that at the general educational one.

Evaluation and prognosis of non-infectious risk in children in dependence on age and period of living in the Far North.

UNLABELLED: Aim of the study was to define the interconnection between the period of living in extreme conditions of the Far North and non-infectious risk-factors (RF) development. The research of prevalence of main RF (salt-sensitivity deviation (SSD), low physical activity (LPhA), dyslipidemia, hyperglycemia, smoking, low Mg blood level, excessive body mass (EBM), elevated blood pressure (EBP)) was done. 1,492 schoolchildren aged 11-14 years living in the Far North (Nadym-city, Yamalo-Nenets Autonomous Okrug) were examined. The comparative analysis of the RF mentioned above was carried out in two groups: in children living in high latitudes since their birth (66.7%) and in children living in the Far North less than 10 years (33.3%). RESULTS: It was stated that the higher the child's age, the higher RF he had. Low physical activity was the most prevalent predictor of non-infectious risk among all age-gender groups--it was found out in 14 year-old school-children 1.6 times more often than in 11-year aged children (67.6% vs 41.7%, p < 0.05). One of three adolescents had deviation in salt-sensitivity. Among children who lived in the Far North more than 10 years, low Mg blood level was found twice and increased BP 1.6 times more often in comparison with other children (26.7% vs 13.1% and 5.6% vs 3.5%, respectively). The longer the period of living in the Far North, the more prevalent were in children population such RF as low physical activity (40.9%), salt sensitivity deviations (34.9%), excessive body mass (14.2%). Population attributive risk conditioned by living in the Far North since birth was calculated. The results showed that the birth and long period of living in the Far North contributed greatly to such RF as EBP (0.56), hyperglycemia (0.3), low Mg blood level (0.21). CONCLUSION: The number of children having RF increased in accordance with increase of age and period of living in the Far North. The prevalent pathology predictors were low physical activity, dyslipidemia, salt sensitivity deviation, low Mg blood level, smoking. The frequency of a single RF in the population increased with age 2-4 times. The obtained data evidence the negative influence of extreme factors of the Far North on children's health and demand early RF prevention. The great attention in medical care must be given to children who were born and grow in Circumpolar region conditions.

[Main trends concerning risk factors and health of adolescents in Far North]. / Osnovnye tendentsii v otnoshenii faktorov riska i zdorov'ia podrotskov na Krainem Severe.

The actual problems of health-keeping in children and adolescents living in high latitudes are analyzed. The data on morbidity and spreading of risk factors of chronic non-infectious diseases in adolescents aged 14-17 living in the Far North are presented.

[Electron microscopic study of the structure of cholera bacteriophage serotype II]. / Elektronno-mikroskopicheskoe issledovanie struktury kholernogo bakteriofaga II serotipa.

The methods of electron microscopy and optic difraction were used to determine the main parameters of the structural organization of cholera bacteriophage of serotype II. The virions of the phage under study were found to consist of a capsid of icosahedral shape and 77.4 X 66.1 nm in size, formed of 252 morphological subunits and having the cavity volume of 76.3 X 10(3) nm3. A process of 94.8 nm in length adheres to the capsid, with a shell capable of contractions, of 85.6 nm in length, 20.6 nm in width, containing 60 morphological subunits. The shell covers the central core of 8.9 nm in diameter. The optic difraction revealed the helical type of symmetry of the process structure and its main parameters.

[Morphology of the temperate plague phages 1701 and 1710 and their mutants]. / Morfologiia chumnykh umerennykh fagov 1701, 1710 i ikh mutantov

A study was made of the morphology of plague moderate bacteriophages 1701, 1710 and their mutants 1701-1 and 1710-1. The phages proved to be morphologically identical, were referred to group 5, and were identical to the moderate plague H-phages; when confronted to the commonness of the serological properties and a number of other signs this indicated their affinity.

[Comparative characteristics of the ultrastructure of the causative agents of glanders and melioidosis]. / Sravnitel'naia kharakteristika ul'trastruktury vozbuditelei sapa i melioidoza

The authors examined the ultrastructure of the causative agents of glanders and melio idosis. It was revealed that the structure of their cell wall and of the cytoplasmic membrane was characteristic of Gram negative bacteria. The cytoplasm of both types of the causative agents showed the presence of ribosomes, membrane structure, nucleoid, and also osmiophilic and osmiophobic inclusions.