Segregation in desiccated sessile drops of biological fluids

It is shown here that concurrence between advection and diffusion in a drying sessile drop of a biological fluid can produce spatial redistribution of albumen and salt. The result gives an explanation for the patterns observed in the dried drops of the biological fluids.Comment: 6 pages, 3 figures; submitted to European Physical Journal

Evaporation induced flow inside circular wells

Flow field and height averaged radial velocity inside a droplet evaporating in an open circular well were calculated for different modes of liquid evaporation.Comment: 5 page, 3 figures, submitted to European Physical Journal

Interest to future professional activity as category of pedagogics

The aim of the investigation is to study the interest to future professional activity of students of higher education institution of physical culture. Methods. The methods involve theoretical analysis of psychology and pedagogical literature; a method of the system description. Results. The various points of view concerning a phenomenon of interest and different lines of thought to definition of essence and structurization of interest to professional work are considered. Scientific novelty. The concept «interest in future professional activity» as important component of a professional orientation of the identity of the student is defined; it includes three components: cognitive, emotional and behavioural. Practical significance. The research implications can be useful while developing of pedagogical conditions on formation of students’ interest in future professional activity Целью представленного в статье исследования было изучение интереса к будущей профессиональной деятельности у студентов вуза. Методы, использованные в работе, – теоретический анализ психолого-педагогической литературы и системное описание. Результаты. Рассмотрены различные точки зрения по поводу феномена интереса и разные подходы к определению сущности и структурированию интереса к профессиональной деятельности. Научная новизна исследования состоит в том, что в качестве важной составляющей профессиональной направленности личности студента уточнено понятие «интерес к будущей профессиональной деятельности», определена его структура, включающая три компонента: когнитивный, эмоциональный и поведенческий. Практическая значимость исследования состоит в разработке педагогических условий формирования интереса у студентов к будущей профессиональной деятельности

The Structure of Polyvinyl Alcohol Adsorption Layers at Interfaces with Benzene in Connection with Stability of Concentrated Emulsions

Determination of PV A adsorbtion on interfaces between PV A and benzene was performed. Adsorbed layers are formed under dynamic conditions emulsions were prepared by vibrocomminution and ultrasonic dispergation). Adsorbtion data are used in calculation of the area per adsorbed molecule and the thickness of interfacial adsorpbtion layers. Adsorption isotherms are compared with rheological parameters of adsorbed layers. On the basis of reported data on the distribution of adsorbed segments of PV A molecules, the interfacial thickness of the adsorbed layer is estimated to be several hundreds of A in a fo rm of gel. The formation of the gel is a result of condensation and phase deemulgation which is in agreement with a similar mechanism of gel formation in solution with diffuse distribution of polymer segments in the adsorbed layer. It is shown that at least one monolayer must cover drops of benzene in order to obtain stable emulsions. Kinetic parameters and the energy of activation of coalescence are dependent on PV A adsorption

Internal scheme of the body assessment in an experiment with environmental uncertainty

The aim of the work was to analyze the influence of various environmental factors forming environmental uncertainty on the nature of the transformation of the "internal scheme of the body". Materials and methods. For the study, a group of healthy volunteers (n = 90) was selected. The results in this paper are median, 75 and 25 percentiles (Me [UQ / LQ]). The study was conducted in several stages. At the first stage, the criteria for excluding potential participants from the experiment were formed. At the second stage of the study, a video analysis of the main anatomical orientations of the pelvic region in static and dynamic samples was conducted for all participants. Conclusion. In the course of the study, specific patterns of spatial deviations of biomechanical blocks of the pelvic region were established, triggered by changes in the qualitative and quantitative parameters of the external environment. So, in conditions of static equilibrium, coordination is activated with involvement of the anterior and posterior half-rings of the pelvis (frontal biomechanical blocks); in conditions of dynamic equilibrium, diagonal biomechanical blocks of the pelvic region are activated; in conditions of deprivation of visual afferentation, the compensatory reactions of the lateral semirings of the pelvic region (lateral biomechanical blocks) are formed

ХИМИЧЕСКИЙ СОСТАВ ВАЛЕРИАНЫ ЛЕКАРСТВЕННОЙ И ВЫНОС ЭЛЕМЕНТОВ МИНЕРАЛЬНОГО ПИТАНИЯ ПРОДУКЦИЕЙ

The removal of macro and micro elements has been determined as a result of field research on sod-podzol sandy soils spread with thin loam in Grodno region. It’s established that on average valerian consumes from soil 135.3–184.9 kg/hectare of nitrogen; 55.9–69.9 kg/ha of P2О5;  143.0–177.8 kg/ha of K2О; 96.4–120.1 kg/ha of CaO; 29.1–37.0 kg/hectare of MgO; 74.7–101.7 g/ha of boron, 51.4–64.6 g/ha of copper and 171.0–210.7 g/ha of zinc. In respect of the quantity of the consumed nutrition elements per unit of area they can be put in the order of decrease: K > N > Ca > Р > Mg. Per 10 c of roots and rhizomes leaves of valerian remove 36.0–40.2 kg of nitrogen; 14.4–15.9 kg of phosphorus; 35.8–40.7 kg of potassium; 25.3–27.8 kg of calcium; 7.7–8.7 kg of magnesium; 18.8–22.1 of boron; 11.6–16.3 of copper and 41.8–48.9 of zinc. The main part of phosphorus, potassium, calcium and magnesium is removed by leaves, most boron, copper and zinc – by roots and rhizomes. Определен вынос макро- и микроэлементов в полевых исследованиях, которые проводились в почвенно-климатических условиях Гродненской области на дерново-подзолистой супесчаной почве, подстилаемой моренным суглинком. Установлено, что в среднем растения валерианы потребляли из почвы 135,3–184,9 кг/га азота, 55,9–69,9 кг/га P2О5; 143,0–177,8 кг/га К2О; 96,4–120,1 кг/га CaO; 29,1–37,0 кг/га MgO; 74,7–101,7 г/га бора; 51,4–64,6 г/га меди; 171–210,7 г/га цинка. По количеству потребляемых элементов питания с единицы площади их можно расположить в следующем порядке убывания: K > N > Ca > Р > Mg. В расчете на 10 ц корней и соответствующим количеством листовой массы валерианы лекарственной выносится 36,0– 40,2 кг азота; 14,4–15,9 кг фосфора; 35,8–40,7 кг калия; 25,3–27,8 кг кальция; 7,7–8,7 кг магния; 18,8–22,1 г бора; 11,6–16,3 г меди и 41,8–48,9 г цинка. Основная часть фосфора, калия, кальция и магния выносится листьями, большая часть бора, меди и цинка – корнями

Correlation effects during liquid infiltration into hydrophobic nanoporous mediums

Correlation effects arising during liquid infiltration into hydrophobic porous medium are considered. On the basis of these effects a mechanism of energy absorption at filling porous medium by nonwetting liquid is suggested. In accordance with this mechanism, the absorption of mechanical energy is a result expenditure of energy for the formation of menisci in the pores on the shell of the infinite cluster and expenditure of energy for the formation of liquid-porous medium interface in the pores belonging to the infinite cluster of filled pores. It was found that in dependences on the porosity and, consequently, in dependences on the number of filled pores neighbors, the thermal effect of filling can be either positive or negative and the cycle of infiltration-defiltration can be closed with full outflow of liquid. It can occur under certain relation between percolation properties of porous medium and the energy characteristics of the liquid-porous medium interface and the liquid-gas interface. It is shown that a consecutive account of these correlation effects and percolation properties of the pores space during infiltration allow to describe all experimental data under discussion