54 research outputs found

    Phase-locking at low-level of quanta

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    We discuss phase-locking phenomena at low-level of quanta for parametrically driven nonlinear Kerr resonator (PDNR) in strong quantum regime. Oscillatory mode of PDNR is created in the process of a degenerate down-conversion of photons under interaction with a train of external Gaussian pulses. We calculate the Wigner functions of cavity mode showing two-fold symmetry in phase space and analyse formation of phase-locked states in the regular as well as the quantum chaotic regime.Comment: 6 pages, 4 figure

    АNALYSIS OF THE EXPRESSION LEVEL OF T-CELL GENES AND OXIDATIVE PROCESSES IN STROKE

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    The level of expression of genes of transcription factors (GATA-3, TBX21, IL-2PG), and changing  of oxidative processes in ischemic stroke were studied.It was found that activation of Th2 cells (increase in the expression of transcription factor GATA-3) is observed in stroke,   and suppression of Th1 cells (a decrease in the expression of IL-2 and its receptors, as well as the TBX21 gene).  Increasing the expression of transcription factor GATA-3 in stroke patients underlies the increase in production in these patients of Th2-cytokines.    A comparative analysis of protein oxidation in blood plasma revealed an increase in the intensity of oxidative modification of proteins in stroke patients.  Investigation of glutathione content, activity of glutathione peroxidase enzymes, glutathione reductase in erythrocytes in stroke revealed a decrease in the content of glutathione and glutathione reductase and an increase in the activity of glutathione peroxidase.The findings may be useful for a better understanding of the mechanisms of stroke

    Forbush decrease observed by SEVAN particle detector network on November 4, 2021

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    On November 3-4 2021, an interplanetary coronal mass injection (ICME) hits the magnetosphere, sparking a strong G3-class geomagnetic storm and auroras as far south as California and New Mexico. All detectors of the SEVAN network registered a Forbush decrease (FD) of 5-10 percentdeep in 1 minute time series of count rates. We present the results of a comparison of Fd registered on mountain altitudes on Aragats (Armenia), Lomnicky Stit (Slovakia), Musala (Bulgaria), and at sea level DESY (Hamburg, Germany), and in Mileshovka, Czechia. We present as well purity and barometric coefficients of different coincidences of SEVAN detector layers on Aragats. We demonstrate disturbances of the near-surface electric (NSEF) and geomagnetic fields at the arrival of the ICME on Earth

    Knowledge transmission patterns at the border: ethnobotany of Hutsuls living in the Carpathian Mountains of Bukovina (SW Ukraine and NE Romania)

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    Background Cross-border research is a novel and important tool for detecting variability of ecological knowledge. This is especially evident in regions recently divided and annexed to different political regimes. Therefore, we conducted a study among Hutsuls, a cultural and linguistic minority group living in Northern and Southern Bukovina (Ukraine and Romania, respectively). Indeed, in the 1940s, a border was created: Northern Bukovina was annexed by the USSR while Southern Bukovina remained part of the Kingdom of Romania. In this research, we aim to document uses of plants for food and medicinal preparations, discussing the different dynamics of Local Ecological Knowledge (LEK) transmission among Hutsuls living in Ukraine and Romania. Methods Field research was conducted using convenience and snowball sampling techniques to recruit 31 Hutsuls in Ukraine and 30 in Romania for participation in semi-structured interviews regarding the use of plants for medicinal and food preparation purposes and the sources of such knowledge. Results The interviews revealed that, despite a common cultural and linguistic background, ethnobotanical knowledge transmission occurs in different ways on each side of the border. Family is a primary source of ethnobotanical knowledge transmission on both sides of the border; however, in Romania, knowledge from other sources is very limited, whereas in Ukraine interviewees reported several other sources including books, magazines, newspapers, the Internet and television. This is especially evident when analysing the wild plants used for medicinal purposes as we found 53 taxa that were common to both, 47 used only in Ukraine and 11 used only in Romania. While Romanian Hutsuls used almost exclusively locally available plants, Ukrainian Hutsuls often reported novel plants such as Aloe vera, Aronia melanocarpa and Elaeagnus rhamnoides. Knowledge related to these plants was transferred by sources of knowledge other than oral transmission among members of the same family. Therefore, this may imply hybridization of the local body of knowledge with foreign elements originating in the Soviet context which has enriched the corpus of ethnobotanical knowledge held by Ukrainian Hutsuls. Conclusions While ethnobotanical knowledge among Romanian Hutsuls is mainly traditional and vertically transmitted, among Ukrainian Hutsuls there is a considerable proportion of LEK that is transmitted from other (written and visual) sources of knowledge. This cross-border research reveals that despite a common cultural background, socio-political scenarios have impacted Hutsul ethnobotanical knowledge and its transmission patterns

    Изучение электропроводности почвы и урожайности картофеля, удобряя растения совместно и отдельно цеолитом, цеокарбофосом и биогумусом

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    We have studied the impact of potato drill sowing fertilization with zeokarbofos, zeolite and biohumus, both separately and in combination, on the soil conductivity and potato yield. It has been found out that fertility increases by 80÷140 g/ha compared with test one in all backgrounds. The highest yield has been received after applying zeokarbofos and biohumus to the soil in combination. Used fertilizers have increased soil specific electrical conductivity, which positively affects the plant fertility. We suggest to introduce the obtained results in agriculture and to take into account soil specific conductivity during soil fertility evaluation.Статья посвящена изучению урожайности картофеля и электропроводности почвы, удобряя растения цеолитом, цеокарбофосом и биогумусом в отдельности и совместно. Исследования показали, что применение удобрений обеспечивает урожайность в пределах 80-140 ц/га относительно контроля. Самая высокая урожайность получается при сочетании цеокарбофоса и биогумуса (450 ц/га). Принимаемые удобрения положительно влияют на повышение электропроводностьи почвы, вследствии чего повышается урожайность растений. Изучение электропроводности почвы относится к числу малоизученных проблем. Проведенные опыты могут быть использованы в сельском хозяйстве
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