ОСОБЕННОСТИ ОСНОВНЫХ ПОКАЗАТЕЛЕЙ ФИЗИЧЕСКОГО РАЗВИТИЯ ПОДРОСТКОВ В ТОМСКОЙ ОБЛАСТИ

Objective. To study the physical growth and development of adolescents (aged 13–16 years) living in the Tomsk region. Material and Methods. This study is a framework (№299 from 18.07.2011) of the Department of Health Care of Tomsk region, we analyzed the results of medical examinations of adolescents (n = 7120, average age 13.98 ± 0.04, 49.87% – boys). Measurements of height and weight, the circumference of the chest and head (data rounded to 0.1 kg and 0.1 cm, respectively) are taken. The body mass index (BMI) is calculated as the ratio of weight (kg) / height2 (m2). Statistical analysis was performed using the software package Statistica for Windows 10.0 and the software StatCalc 6.0.Results. Average height of adolescents is (163.10 ± 0.09) cm. On Average boys are taller than girls ((165.34 ± 0.15) cm and (160.87 ± 0.11) cm, p < 0.001). The body weight is (53.99 ± 0.13) kg (boys – (55.28 ± 0.20) kg, girls – (52.72 ± 0.17) kg, p < 0.001). Boys chest circumference is (79.26 ± 0.30) cm, girls is (79.99 ± 0.13) cm, head circumference are (55.43 ± 0.07) cm and (54.77 ± 0.04) cm, respectively (p < 0.01). The results show difference between Tomsk boys and rest of the Russia Federation. The average BMI is (20.20 ± 0.04) kg/m2 (girls – (20.32 ± 0.07), boys – (20.08 ± 0.06) kg/m2). The urban lifestyle in Tomsk Region leads to boys obesity.Conclusion. The study revealed the regional physical growth and development characteristics. Anthropometric data in Tomsk region adolescents are higher than the same data in RF.Цель исследования: изучить особенности физического развития подростков, проживающих в Томской области.Материал и методы. В настоящем исследовании проанализированы результаты диспансеризации подростков в возрасте 13–16 лет, проведенной в рамках распоряжения Департамента здравоохранения Томской области № 299 от 18.07.2011 (7120 человек, средний возраст (13,98 ± 0,04) года). Проводили измерение длины и массы тела (данные фиксировали с точностью до 0,1 кг и 0,1 см соответственно), окружности груди и головы с точностью до 0,1 см. Индекс массы тела (ИМТ) рассчитывали как соотношение вес (кг) / рост (м2). Статистическую обработку результатов проводили при помощи пакета программ Statistica for Windows 10.0 и программного продукта StatCalc 6.0.Результаты. Средний рост включенных в исследование подростков составил (163,10 ± 0,09) см, юноши имели более высокий рост при сравнении с девушками ((165,34 ± 0,15) и (160,87 ± 0,11) см, р < 0,001). Средняя масса тела участников исследования составила (53,99 ± 0,13) кг (юноши – (55,28 ± 0,20) кг, девушки – (52,72 ± 0,17) кг, р < 0,001). При сравнении со средними антропометрическими российскими показателями выявлено, что ростовые показатели подростков, а также масса тела юношей Томской области превышали аналогичные средние показатели по России. Средний показатель окружности груди у мальчиков составил (79,26 ± 0,30) см, у девочек – (79,99 ± 0,13) см, окружности головы – (55,43 ± 0,07) и (54,77 ± 0,04) см соответственно, р < 0,01. При сравнении с общероссийскими показателями выявлены более высокие показатели окружности головы и груди у подростков Томской области. Среднее значение ИМТ у подростков составило (20,20 ± 0,04) кг/м2, (девушки – (20,32 ± 0,07), юноши – (20,08 ± 0,06) кг/м2). Стратификация детей по ИМТ в зависимости от пола и района проживания выявила ассоциацию ожирения с мужским полом и городским образом жизни.Заключение. ВМЛВ. Проведенное исследование позволило выявить региональные особенности физического развития детей. Антропометрические показатели подростков в Томской области характеризуется более высокими данными роста, массы тела, окружности груди и головы в сравнении с аналогичными параметрами в РФ

Половое развитие подростков в Томской области

Background. Sexual development of adolescents is one of the important indicators of the population well-being, the study of which, in the context of the world trend towards a change in the period of puberty, can contribute to the identification of public health problems. Objective. Our aim was to study the basic indicators of sexual development of adolescents and to determine the regional characteristics of this population. Methods. The evaluation of secondary sexual characteristics was carried out by specialists according to Tanner criteria. Ultrasound examination of organs of the reproductive system was carried out using a portable scanner Mindray M7. The analysis of the results was carried out taking into account the gender, living conditions, physical development. Results. We examined 7,120 adolescents aged from 13 to 16 years. The degree of axillary hair distribution by Tanner criteria was 2.4±0.7 in young men, 2.9±0.4 — in girls, pubic hair — 2.0±0.9 and 2.6±0.8, respectively. The indicator of development of mammary glands by Tanner criteria in girls was 2.6±0.8, menstrual function by Tanner criteria — 2.4±0.8. Herewith, urban adolescents had later terms of appearance of the secondary sexual characteristics in comparison with the inhabitants of rural areas. Conclusion. We registered the delayed sexual development in 8.1% of girls and 13.6% of young men. Urban youths have experienced a delay in gonadal growth. Among the female population there was an outstripping growth and development of the uterus and ovaries in comparison with rural adolescents. Половое развитие подростков — один из важных показателей благополучия населения, изучение которого в условиях мировой тенденции к изменению сроков наступления пубертатного периода может способствовать выявлению проблем общественного здравоохранения. Цель исследования — изучить основные показатели полового развития подростков и определить региональные особенности данной популяции. Методы. Оценка вторичных половых признаков проводилась врачами-специалистами по критериям Tanner. Ультразвуковое исследование органов репродуктивной системы осуществлялось при помощи переносного сканера Mindray M7. Анализ результатов проводили с учетом пола, условий проживания, физического развития. Результаты. Обследовано 7120 подростков в возрасте от 13 до 16 лет. Степень оволосения подмышечной впадины по критериям Tanner составила у юношей 2,4±0,7, у девушек — 2,9±0,4, степень лобкового оволосения — 2,0±0,9 и 2,6±0,8 соответственно. Показатель развития молочных желез по критериям Tanner у девушек составил 2,6±0,8, менструальная функция по критериям Tanner — 2,4±0,8. При этом у городских подростков выявлены более поздние сроки появления вторичных половых признаков в сравнении с жителями сельских районов. Заключение. У 8,1% девушек и 13,6% юношей зарегистрирована задержка полового развития. У городских юношей выявлена задержка роста гонад; среди женского населения наблюдалось опережение роста и развития матки и яичников в сравнении с сельскими подростками.

FEATURES OF THE MAIN INDICATORS OF THE PHYSICAL DEVELOPMENT OF TEENAGERS IN THE TOMSK REGION

Objective. To study the physical growth and development of adolescents (aged 13–16 years) living in the Tomsk region. Material and Methods. This study is a framework (№299 from 18.07.2011) of the Department of Health Care of Tomsk region, we analyzed the results of medical examinations of adolescents (n = 7120, average age 13.98 ± 0.04, 49.87% – boys). Measurements of height and weight, the circumference of the chest and head (data rounded to 0.1 kg and 0.1 cm, respectively) are taken. The body mass index (BMI) is calculated as the ratio of weight (kg) / height2 (m2). Statistical analysis was performed using the software package Statistica for Windows 10.0 and the software StatCalc 6.0.Results. Average height of adolescents is (163.10 ± 0.09) cm. On Average boys are taller than girls ((165.34 ± 0.15) cm and (160.87 ± 0.11) cm, p < 0.001). The body weight is (53.99 ± 0.13) kg (boys – (55.28 ± 0.20) kg, girls – (52.72 ± 0.17) kg, p < 0.001). Boys chest circumference is (79.26 ± 0.30) cm, girls is (79.99 ± 0.13) cm, head circumference are (55.43 ± 0.07) cm and (54.77 ± 0.04) cm, respectively (p < 0.01). The results show difference between Tomsk boys and rest of the Russia Federation. The average BMI is (20.20 ± 0.04) kg/m2 (girls – (20.32 ± 0.07), boys – (20.08 ± 0.06) kg/m2). The urban lifestyle in Tomsk Region leads to boys obesity.Conclusion. The study revealed the regional physical growth and development characteristics. Anthropometric data in Tomsk region adolescents are higher than the same data in RF

Sexual Development of Adolescents in the Tomsk Region

Background. Sexual development of adolescents is one of the important indicators of the population well-being, the study of which, in the context of the world trend towards a change in the period of puberty, can contribute to the identification of public health problems. Objective. Our aim was to study the basic indicators of sexual development of adolescents and to determine the regional characteristics of this population. Methods. The evaluation of secondary sexual characteristics was carried out by specialists according to Tanner criteria. Ultrasound examination of organs of the reproductive system was carried out using a portable scanner Mindray M7. The analysis of the results was carried out taking into account the gender, living conditions, physical development. Results. We examined 7,120 adolescents aged from 13 to 16 years. The degree of axillary hair distribution by Tanner criteria was 2.4±0.7 in young men, 2.9±0.4 — in girls, pubic hair — 2.0±0.9 and 2.6±0.8, respectively. The indicator of development of mammary glands by Tanner criteria in girls was 2.6±0.8, menstrual function by Tanner criteria — 2.4±0.8. Herewith, urban adolescents had later terms of appearance of the secondary sexual characteristics in comparison with the inhabitants of rural areas. Conclusion. We registered the delayed sexual development in 8.1% of girls and 13.6% of young men. Urban youths have experienced a delay in gonadal growth. Among the female population there was an outstripping growth and development of the uterus and ovaries in comparison with rural adolescents

Kinetics of the reaction of Mer-tris(picolinato)iron(III) with hydrogen peroxide in pyridine: Role of hydroxyl radicals in subsequent catalytic oxygenation of cyclohexane to the ketone

Reaction of pale-green high spin mer-tris(picolinato)iron(III) with t-butylhydroperoxide in pyridine gives rise to an EPR signal for the t-butylperoxyl radical via a short lived purple intermediate which itself decays eventually to a yellow-brown high spin iron(III) product. The kinetics of the corresponding reaction with hydrogen peroxide have been studied in regard to the dependence of the hydrogen peroxide and picolinic acid concentration on the rate of the initial stages. The results support two rate-determining initial steps (minutes) involving the formation of a short lived purple high spin hydroperoxo- or t-butylperoxoiron(III) intermediate (lambda(max) = 530 mn, epsilon similar to 1,000 dm(3) mol(-1) cm(-1) for the hydroperoxo species) via pre-equilibrium loss of one picolinic acid which then undergoes homolytic Fe-O bond cleavage to give iron(II) and hydroperoxyl (t-butylperoxyl) radical resulting in eventual formation of deep yellow-brown solution which undergoes further complex UV-visible changes over a period of several hours. During this latter timescale these solutions are able to carry out Gif-type catalytic oxygenation of cyclohexane to cyclohexanone in the presence of H2O2 (or O-2/pyH(+)/Zn powder) a process which however is completely inhibited in the presence of small amounts of dimethylsulfoxide, an efficient scavenger of the hydroxyl radical. Bis(picolinato)copper(II) was found to be a poor oxygenation catalyst, a finding consistent with its inability to generate the hydroxyl radical via Cu(I) under the same conditions. These results confirm that generation of hydroxyl radicals (via reaction of H2O2 with iron(II) or any other suitably reactive lower valent state) is central to the oxygenation chemistry carried out by these solutions.</p