Development of theory and devices water dynamic air conditioning

Обосновано новое решение актуальной научной проблемы создания              нормативных условий труда на робочих местах в замкнутых производственных  пространствах, в частности, в горных выработках глубоких шахт, по факторам запыленности воздуха и температуры. На основе развития теории   гидродинамического очищения воздуха от пыли и  охлаждения его водой, обоснованы функциональные, параметрические и конструктивные   особенности  кондиционера в виде многокамерного водного эжектора.  Впервые определены условия и параметры для создания импульсно-волнового процесса очищения и охлаждения воздуха в многокамерном эжекторе, позволяющем создавать смесь из воздуха и капель воды, что повышает эффективность улавливания пыли и охлаждения воздуха. Получены    закономерности,  позволяющие разработать модуль кондиционера, на  основе которого могут быть созданы  установки различной  производительности.Ключевые слова: охрана труда,  пыль, воздух, вода, очищение,  охлаждение.It is proved the new solution actual scientific problem of creating a regulatory working condition in confined spaces of production, in particular in the workings of deep mines, according to the factors of air purity and temperature. On the basis of the theory of the hydrodynamic air purification from dust and cool it with water, proved functional, parametric design features and air conditioning unit in a                  multi-chamber of the ejector. For the first time defined the conditions and parameters for creating a pulse-wave process of purification and cooling for multi-ejector-based, allowing  creating the foam from the air and water, which improves the efficiency of dust   removal and cooling. On the basis of the laws of design main unit air conditioner with multi-chamber steam ejector and refrigerant, this allows you to create blocks with the required performance.Keywords: safety, dust, air, water, purification, cooling

STUDIES ON THE ANNUAL RADIAL INCREMENT OF PINE TREES FOR RECONSTRUCTION OF CHANGES IN THE WATER LEVEL OF RAIFA LAKE

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STUDIES ON THE ANNUAL RADIAL INCREMENT OF PINE TREES FOR RECONSTRUCTION OF CHANGES IN THE WATER LEVEL OF RAIFA LAKE

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Influence of light and heavy lanthanides on the physiological processes of taraxacum hybernum

© 2020, Editorial board of Journal of Experimental Biology and Agricultural Sciences. All rights reserved. The current study was carried out to study the influence of light and heavy lanthanides on the physiological process of Crimean-Sagyz/ Krim-saghyz (dandelion-Taraxacum hybernum). Lanthanide belongs to the group of light or heavy; infiltration of dandelion (Crimean saghyz) seeds with light and heavy lanthanides solutions increased the germination energy by 26%. The differences in the influence of light (cerium) and heavy (lutetium) were manifested in the quantum efficiency change of the photosystem 2 (PS II). Treatment of leaves with high concentrations (100 µM) led to a decrease of Y (II), moreover, under the influence of light lanthanide, the decrease was greater by 21%. It is assumed that the effect of the used lanthanides on the dandelion photosynthetic apparatus is multidirectional. Cerium influenced the PS II antenna complex, and lutetium influenced the reaction centers. A 10-fold decrease in the concentration did not change the nature of cerium action, except that Y (II) was restored already on the second day after treatment. The effect of lutetium became noticeable only by the 8th day after treatment when Y (II) became higher than that of untreated plants. Thus, the results of the study suggested that in dandelion leaves, lanthanides with a concentration of 10 µM increased the quantum efficiency of PS II in contrast to cerium

Laboratory and Field Assessment of the Frost Resistance of Sosnowsky’s Hogweed

© 2020, Pleiades Publishing, Ltd. Abstract: The frost resistance of Sosnowsky’s hogweed plants (Heracleum sosnowsky Manden.) has been evaluated under laboratory and field conditions. The death of seedlings and adult plants observed within a temperature range from –6 to –12°C indicates low frost tolerance of the species. A snow cover provides a stable soil temperature (no less than –3°С) at the depth of renewal bud location and, therefore, provides the sustainability of meristematic potential in cenopopulations of H. sosnowsky. A shifting of freezing temperature for a H. sosnowsky meristem from –12°С (autumn) to –5 to –7°С (spring) is probably caused by the lack of a true dormancy stage and by changes in the content of cryoprotectors. Plant seeds also demonstrate reduced frost resistance after stratification (overwintering) and increased tissue water content. Field studies were carried out with assistance of volunteers within the framework of the “Moroz” (“Frost”) project arranged within the borders of the invasion habitat of the species in European Russia and based on the principles of citizen science. The results of the study show that the destruction of Sosnowsky’s hogweed plants after the snow cover removal depends only on weather conditions. Thus, elimination of H. sosnovsky stands by freezing can be recommended only for regions where average long-term minimum temperatures in January and February do not exceed –25°C; this method can be relevant for territories where the use of chemical herbicides is limited or prohibited