Diversity of chrysophycean stomatocysts was studied in the steppe zone of the South Urals. A total of 14 stomatocyst morphotypes were identified, of which four were for the first time observed in ...Russia. Two morphotypes were described as novel. Morphological descriptions, scanning electron microscopic (SEM) images, and geographical locations were provided for all stomatocysts. High diversity of chrysophycean stomatocysts points to significant development of the chrysophyte flora in reservoirs of the steppe zone of the South Urals, making further research relevant.
Recent developments of the microwave heating of compacted metal powders bring a demand on calculation of corresponding effective optical parameters. Since the existing models cannot be applied to ...such powders, in this paper new effective dielectric permittivity and magnetic permeability are introduced by means of the combination of Mie theory and Bruggeman's effective medium. It is demonstrated that both an insulating shell and the skin effect should be taken into account. The shell drastically modifies the effective permittivity, while ignoring the skin effect brings to the permittivity an error as large as 30% at 30
GHz for copper powder with grains of
50
μ
m
radius. The induced currents are shown to affect the magnetic properties of the powders. The strong skin effect substantially reduces the permeability of magnetic grains, and thus the intrinsic permeability measured in experiments can be much less than the real one. The strong dependence of the effective parameters on the microstructure of powders suggests a variety of possible heating scenarios in experiments.
The article describes the assessment of the predicted water flows at the site of the projected rock dumps, which was carried out using geofiltration modeling. When developing the model, we used ...actual data on capacities, filtration coefficients and water capacity, roof and sole marks of the selected aquifers, precipitation infiltration, as well as the projected dumps are located on the slope surface. We schematized hydrogeological filtration conditions in relation to existing natural conditions, taking into account the planned construction and operation of dumps, and also determined the maximum water inflow of underground and surface water into the drainage system. Based on the obtained data, the most effective version of the drainage system for the removal of underground and surface water from the territory of dumps has been developed, which will allow to perform the maximum possible interception of the flow of underground water and flood water, to form depression surfaces in the near-slope mass of the body of dumps, to prevent filtration deformations of the ledges and to ensure the normative bearing capacity of rocks. The provided drainage devices will ensure the overall stability of the ledges of the dumps, both during their long standing and during their constant formation.
This article reviews a webinar of the European Society for Vascular Surgery and the Endovascular Trauma and Resuscitation Management Society, dedicated to using endovascular balloon occlusion of the ...aorta in haemodynamically unstable patients, briefly covering the main conclusions of the reports and underlining prospects of this method. Possibilities of using aortic balloon occlusion arise interest of various-specialty medical experts, and the number of scientific works in this field has increasingly been growing, thus explaining the need for measures and studies on the subject concerned.
Data on the main biologically active organogermanium compounds that were synthesized in the past 5 – 10 years were reviewed. The dietary trace element germanium is necessary to ensure normal ...functioning of the body. Therefore, practically all water-soluble stable organogermanium compounds exhibit biological activity and attract the attention of researchers.
The present paper provides results of studying the dynamics of ecological trails development in specially protected natural areas of Altai Krai. The study revealed the average number of the trails ...visitors, trail length, information content for educating students. Recommendations are given on the further development of this focus area and regular effective work on ecological trails. The authors identified the most attended ecological trails, studied the activities for schoolchildren and tourists on specially equipped trails in the wild. The article also examines the impact of the trails development on the environmental education of schoolchildren and the research work of students of the Department of Recreational Geography, Tourism and Regional Marketing of Altai State University (Geography Department) while developing the environmental routes.
The article shows that in the structure of quasicrystalline systems it is possible the formation of quantum dots, which are potential wells of various forms with quantized motion of an electron or ...proton, which allowed us to put forward the hypothesis of the existence of a constant component in the infrared radiation of the moon surface.
Chlorococcum oleofaciens is one of the most studied representatives of the Chlorococcum genus, both on the ultrastructural and molecular levels. This alga is very interesting due to its ability to ...hypersynthetize saturated and unsaturated fatty acids and the possibility of using it as a promising object for biofuel production. This research is devoted to the study of the halotolerant strain of Ch. oleofaciens Ch-1 extracted from the water of the Khara River (Lake Elton Biosphere Reserve, Russia, a UNESCO World Heritage site), mineralization of 14‰. The strain Ch. oleofaciens Ch-1 was studied at the morphological level (light microscopy), as well as using molecular
genetics methods (18S rDNA). The objectives of the study included establishing the range of halotolerance of the allocated strain of Ch. oleofaciens as a whole, revealing borders of level of mineralization that are optimum for algae growth, and also tracing features of its morphology and cycle of development in the conditions of various salinity.
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