Adequate hemodynamic response threshold in athletes at graduated physical loads

Objective of the study was to identify the adequate hemodynamic response threshold in athletes grouped by different cardiorespiratory system adaptation types and exposed to graduated physical loads. Graduated intensity (50 W to 200 W) cycle ergometer tests were used to apply the varying physical loads, with no rest breaks in the process. The subject athletes were grouped by different cardiorespiratory adaptation types, with the loads up to 200 W in the cycle ergometer step tests being applied for the above athletes' grouping. Based on the tests, the subjects were grouped into 5 groups based on the following cardiorespiratory system adaptation types: chronotopic, inotropic, respiratory, chronotropicrespiratory and the inotropic-respiratory type. Subject to the study were 18-35 years old men athletes (n=59) engaged in different sports and having a variety of sport qualifications from Sport Masters down to mass Class Athletes. The adequate hemodynamic response threshold was found to depend on the cardiorespiratory system adaptation types and load intensities. The higher was the adequate hemodynamic response threshold, the higher were the functional and reserve capacities of the athletes as verified by the SBV (specific blood volume) rate variations under the graduated loads. Therefore, the adequate hemodynamic response threshold may be applied as a body functional and reserve capacity indicator

INFLUENCE OF MONTMORILLONITE ON THE CHANGE OF ELECTRET PROPERTIES OF POLYPROPYLENE

In this work, the electret properties of a polymer composite material based on polypro-pylene were studied. It was found that the introduction of montmorillonite in the amount of 4 wt.% contributes to the improvement of electret properties of polypropylene

Uranium in man-made carbonates on the territory of Ufa

The paper presents the results of analyzing uranium content in man-made carbonates (scale crusts) on the territory of Ufa based on examination of 42 samples. The median uranium content in the investigated samples stands at 1.44 mg/kg, which is significantly lower than the background values (scales from the Lake Baikal water, a clarke of sedimentary carbonate rocks) and data on other settlements of the Republic of Bashkortostan. Low values of uranium content are probably associated with the effects of the three leading factors, i.e. specific subsurface geology of the territory (gypsum, limestone); types of water supply; water treatment processes for the centralized type of water supply. Spatial distribution of uranium in man-made carbonates is characterized with uniformity, which is disturbed in two cases, i.e. a change of the water supply type (from centralized to individual); and material of the vessels used for boiling the water. No significant differences were detected when comparing samples of man-made carbonates associated with different sources of water supply (the bucket and infiltration types of water intake) and the types of household filters

Мониторинг изменений рельефа полигональных торфяников, примыкающих к автодороге Заполярное — Тазовский

The thawing of polygonal ice wedges determines the dynamics of polygonal peatland relief. The polygonal peat plateaus in the Pur-Taz interfluve account for an average of 6,5 % of the total area. The purpose of the proposed study is to establish the short-term rates and direction of change in the plateaus’ relief under the combined action of technogenic and natural factors, using monitoring data for the period 2005–2022. Based on satellite images and orthophotoplans, elements of the peat plateaus have been outlined and their areas have been determined for different time slices. The studies were carried out on a peat plateau immediately adjacent to the highway (T1) and on a background peat plateau at a distance of about 1.5 km from the highway (T2). To identify the natural causes of changes in the relief of the peat plateaus, the influence of climatic parameters is considered. The rates of relief change in natural conditions and under the impact of the highway are also compared. It has been established that in the area to the north-west of the highway the relief of the T1 polygonal peat plateau has stabilized. In the south-east section of T1, degradation has sharply increased after the construction of the highway. Due to the degradation of the polygons, the polygonal troughs expanded. In the background peat plateau T2, the rate of relief degradation is somewhat higher than in the northwestern portion of T1. Comparison of the main climatic parameters and degradation rates of the polygonal relief did not show any clear correlations. Probably, of greater importance are the regime of atmospheric precipitation, the redistribution of surface runoff and recurrence of flooding and drainage of the polygonal troughs, determined by the rhythmic course of the relief degradation.Вытаивание полигонально-жильных льдов (ПЖЛ) определяет динамику рельефа полигональных торфяников. Массивы полигональных торфяников Пур-Тазовского междуречья составляют в среднем 6,5 % от общей площади. Целью исследования является установление краткосрочных темпов и направленности изменения рельефа торфяников под совместным действием техногенных и естественных факторов, основанное на мониторинге за период 2005–2022 гг. По спутниковым снимкам и ортофотопланам оконтурены морфологические элементы торфяника и определены их площади за разные годы. Исследования проведены на торфянике, непосредственно прилегающем к автодороге, покрытой бетонными плитами (Т1), и на фоновом торфянике на удалении примерно в 1,5 км от дороги (Т2). Для выявления естественных причин изменения рельефа торфяников рассмотрено влияние базовых климатических характеристик. Установлено, что на участке к северо-западу от дороги наблюдается стабилизация полигонального торфяника Т1. На юго-восточном участке Т1 деградация после строительства дороги резко усилилась. Полигональные канавы расширялись за счет деградации полигонов. На фоновом торфянике Т2 скорость разрушения поверхности несколько выше, чем на северо-западном участке Т1. Сопоставление основных показателей климата и скоростей деградации полигонального рельефа не дало явных зависимостей. Вероятно, большее значение имеет режим атмосферных осадков, перераспределение поверхностного стока и смена режимов затопления полигональных канав и их дренирования, определяемого ритмичным ходом деградации рельефа

Adequate hemodynamic response threshold in athletes at graduated physical loads

Objective of the study was to identify the adequate hemodynamic response threshold in athletes grouped by different cardiorespiratory system adaptation types and exposed to graduated physical loads. Graduated intensity (50 W to 200 W) cycle ergometer tests were used to apply the varying physical loads, with no rest breaks in the process. The subject athletes were grouped by different cardiorespiratory adaptation types, with the loads up to 200 W in the cycle ergometer step tests being applied for the above athletes' grouping. Based on the tests, the subjects were grouped into 5 groups based on the following cardiorespiratory system adaptation types: chronotopic, inotropic, respiratory, chronotropicrespiratory and the inotropic-respiratory type. Subject to the study were 18-35 years old men athletes (n=59) engaged in different sports and having a variety of sport qualifications from Sport Masters down to mass Class Athletes. The adequate hemodynamic response threshold was found to depend on the cardiorespiratory system adaptation types and load intensities. The higher was the adequate hemodynamic response threshold, the higher were the functional and reserve capacities of the athletes as verified by the SBV (specific blood volume) rate variations under the graduated loads. Therefore, the adequate hemodynamic response threshold may be applied as a body functional and reserve capacity indicator

Vaccination against strontium-90-induced bone tumors.

Objective of the study was to identify the adequate hemodynamic response threshold in athletes grouped by different cardiorespiratory system adaptation types and exposed to graduated physical loads. Graduated intensity (50 W to 200 W) cycle ergometer tests were used to apply the varying physical loads, with no rest breaks in the process. The subject athletes were grouped by different cardiorespiratory adaptation types, with the loads up to 200 W in the cycle ergometer step tests being applied for the above athletes' grouping. Based on the tests, the subjects were grouped into 5 groups based on the following cardiorespiratory system adaptation types: chronotopic, inotropic, respiratory, chronotropicrespiratory and the inotropic-respiratory type. Subject to the study were 18-35 years old men athletes (n=59) engaged in different sports and having a variety of sport qualifications from Sport Masters down to mass Class Athletes. The adequate hemodynamic response threshold was found to depend on the cardiorespiratory system adaptation types and load intensities. The higher was the adequate hemodynamic response threshold, the higher were the functional and reserve capacities of the athletes as verified by the SBV (specific blood volume) rate variations under the graduated loads. Therefore, the adequate hemodynamic response threshold may be applied as a body functional and reserve capacity indicator

THE RATIO OF TISSUE COMPONENTS AND PROGNOSTIC INDICES OF HISTOLOGICAL VARIANTS OF INFILTRATING TYPE OF BREAST CANCER

At the study of histological types of 128 patients with infiltrative type of breast cancer statistically  significant differences of the  quantitative ratio  of tissue  components, of the average values  Nottingham Prognostic   Index  (NPI)  and  the  total  score  of  malignancy established. It is shown  that  the definition of NPI effectively regardless of life expectancy of patients

СООТНОШЕНИЕ ТКАНЕВЫХ КОМПОНЕНТОВ И ПРОГНОСТИЧЕСКИЕ ИНДЕКСЫ ГИСТОЛОГИЧЕСКИХ ВАРИАНТОВ ИНФИЛЬТРИРУЮЩЕГО ТИПА РАКА МОЛОЧНОЙ ЖЕЛЕЗЫ

At the study of histological types of 128 patients with infiltrative type of breast cancer statistically  significant differences of the  quantitative ratio  of tissue  components, of the average values  Nottingham Prognostic   Index  (NPI)  and  the  total  score  of  malignancy established. It is shown  that  the definition of NPI effectively regardless of life expectancy of patients.У 128 пациенток, больных инфильтрирующим типом рака молочной железы, установлены  статистически  значимые различия в количественном соотношении тканевых компонентов, средних  значений Ноттингемского  прогностического индекса (НПИ) и суммарного балла злокачественности при разных  гистологических вариантах. Показано,  что определение НПИ эффективно независимо от показателей продолжительности жизни пациенток