Open and hidden strangeness with kaons and φ\varphi-mesons in Bjorken energy density approach for central A+A collisions from SPS to LHC

We use the available data on $$and$$ for the identified hadrons including $\pi^{+}+\pi^{-}$, $K^{+}+K^{-}$, $p+\overline{p}$, $K^*(892)^0$ and $\varphi$-mesons, registered at midrapidity ($\vert y\vert < 0.5)$ in central 0-5% Au-Au, Pb-Pb and Xe+Xe collisions in a broad range of energies in order to compare the relative contributions to the Bjorken energy density. Particles, like strangeness-neutral $\varphi$-meson (a system of $s\overline{s})$ quarks) and K-meson (containing single s-quark), are of specific interest because they might have different production mechanisms and differ in sensitivity to the properties of the QGP-medium formed in relativistic heavy-ion collisions.Comment: 9 pages, 2 figures, XXV Baldin ISHEP

Localized charged states and phase separation near second order phase transition

Localized charged states and phase segregation are described in the framework of the phenomenological Ginzburg-Landau theory of phase transitions. The Coulomb interactions determines the charge distribution and the characteristic length of the phase separated states. The phase separation with charge segregation becomes possible because of the large dielectric constant and the small density of extra charge in the range of charge localization. The phase diagram is calculated and the energy gain of the phase separated state is estimated. The role of the Coulomb interaction is elucidated

Studies of ticks of the genus Dermacentor (Acari; Ixodidae) on the natural occurrence of tularemia pathogen in the conditions of the Central Pre-Caucasian region

The purpose of the research is the assessment of the Francisella tularensis occurrence in nature in ticks of the genus Dermacentor; understanding the physiological age in terms of tick infection with tularemia pathogen.Materials and methods. For the period from 2015 to 2019, we examined 8449 specimens of Dermacentor marginatus (916 pools), 8674 specimens of D. reticulatus (705 pools), and 109 specimens of D. niveus (40 pools) for tularemia infection. To assess the dependence of tularemia pathogen found in ticks of different physiological ages, we examined 2440 specimens of D. marginatus (360 pools), and 3349 specimens of D. reticulatus (412 pools) for the period from 2016 to 2019. Studies of ixodid ticks infected with tularemia pathogen were performed by the Natural Focal Infection Laboratory of the Stavropol Anti-Plague Institute. Pools of ixodid ticks were examined for the pathogen DNA of tularemia using reagent kits for identifying Francisella tularensis DNA by polymerase chain reaction with fluorescence hybridization of results recorded in real time.Results and discussion. The infection rate of the tularemia pathogen in ticks in the Central Pre-Caucasian region ranged from 0.044–1.127% in D. marginatus and 0.035–1.455% in D. reticulatus in different years. The greatest number of F. tularensis was isolated from the III physiological age ticks. For D. reticulatus ticks, no statistically significant dependence of the detected tularemia pathogen on physiological age was found

EPIDEMIOLOGICAL SITUATION ON CRIMEAN HEMORRHAGIC FEVER IN THE RUSSIAN FEDERATION IN 2016, AND PROGNOSIS FOR 2017

Abstract. This paper presents analysis of epidemiological situation on Crimean hemorrhagic fever (CHF) in Russia in 2016. Summarized are the results of epizootiological survey of the territory of the natural CHF focus in the south of the European part of Russia, discussed are the results of genetic typing of CCHFV RNA isolates. In 2016, the Russian Federation reported 162 cases of CHF. Increase in the incidence of CHF occurred in the Astrakhan, Volgograd Regions, Republic of Kalmykia, and Stavropol Territory. For the first time CHF case was identified in Kabardino-Balkar Republic. In 2016 in stationary points for the long-term observation of the natural CHF focus, high abundance rates of larvae and nymphs of H. marginatum remain. In case of successful Ixodidae ticks wintering and late onset of the hot and dry season in the summer, 2017, there is probability that high numbers of H. marginatum will be retained and the period of the imago activity is prolonged, which may in its turn  contribute to the increase in CHF morbidity rates

Epidemiological Situation on Crimean-Congo Hemorrhagic Fever in the Russian Federation in 2012 and Prognosis for 2013

Represented is epidemiological evaluation of the morbidity rate as regards Crimean-Congo hemorrhagic fever (CCHF) in Russia in 2012. Summarized are the results of epizootiological surveillance over the territory of CHF natural focus in the South of European part of Russia. Forecast of CCHF epidemiological situation development for 2013 is made based on the epizootiological monitoring data

Low doses of ethanol decrease the activity of the angiotensin-converting enzyme in the aorta of aging rats and rats treated with a nitric oxide synthase inhibitor and dexamethasone

A B S T R A C T In the present study, the activity of ACE (angiotensin-converting enzyme) in the aorta of senescent rats and rats treated with the NOS (NO synthase) inhibitor L-NAME (N G -nitro-L-arginine methyl ester) or dexamethasone and the effect of low doses of ethanol (0.2-1.2 g/kg of body weight, daily for 8-12 days) on this activity were studied. We found that ACE activity increased with age and in response to L-NAME and dexamethasone treatment. Ethanol at a dose of 0.4 g/kg of body weight per day decreased ACE activity in the aorta of aged rats and of rats treated with L-NAME or dexamethasone to the level of activity in young control rats. The optimal ethanol dose (the dose inducing a maximum decrease in ACE activity) increased with increasing doses of dexamethasone: 0.4 g/kg of body weight per day at 30 μg of dexamethasone/kg of body weight and 0.8 g/kg of body weight per day at 100 μg of dexamethasone/kg of body weight. It was also found that optimal doses of ethanol increased the number of cells in the thymus of rats treated with dexamethasone. The optimal dose of ethanol of 0.4 g/kg of body weight per day, which induced a maximum decrease in ACE activity in rat aorta, corresponded to a dose of 30 g of ethanol/day, which, according to epidemiological data, produces a maximum decrease in the incidence of cardiovascular disease in humans. In conclusion, the decrease in ACE activity in vessels may be one of the main mechanisms of the beneficial effects of low doses of ethanol on human health

First Beam Commissioning of the 400 MHz LHC RF System

Hardware commissioning of the LHC RF system was successfully completed in time for first beams in LHC in September 2008. All cavities ware conditioned to nominal field, power systems tested and all Low level synchronization systems, cavity controllers and beam control electronics were tested and calibrated. Beam was successfully captured in ring 2, cavities phased, and a number of initial measurements made. These results are presented and tests and preparation for colliding beams in 2009 are outlined

Исследования клещей рода Dermacentor (Acari; Ixodidae) на естественную встречаемость возбудителя туляремии в условиях Центрального Предкавказья

The purpose of the research is the assessment of the Francisella tularensis occurrence in nature in ticks of the genus Dermacentor; understanding the physiological age in terms of tick infection with tularemia pathogen.Materials and methods. For the period from 2015 to 2019, we examined 8449 specimens of Dermacentor marginatus (916 pools), 8674 specimens of D. reticulatus (705 pools), and 109 specimens of D. niveus (40 pools) for tularemia infection. To assess the dependence of tularemia pathogen found in ticks of different physiological ages, we examined 2440 specimens of D. marginatus (360 pools), and 3349 specimens of D. reticulatus (412 pools) for the period from 2016 to 2019. Studies of ixodid ticks infected with tularemia pathogen were performed by the Natural Focal Infection Laboratory of the Stavropol Anti-Plague Institute. Pools of ixodid ticks were examined for the pathogen DNA of tularemia using reagent kits for identifying Francisella tularensis DNA by polymerase chain reaction with fluorescence hybridization of results recorded in real time.Results and discussion. The infection rate of the tularemia pathogen in ticks in the Central Pre-Caucasian region ranged from 0.044–1.127% in D. marginatus and 0.035–1.455% in D. reticulatus in different years. The greatest number of F. tularensis was isolated from the III physiological age ticks. For D. reticulatus ticks, no statistically significant dependence of the detected tularemia pathogen on physiological age was found.Цель исследований: оценка естественной встречаемости Francisella tularensis в клещах рода Dermacentor; выяснение связи физиологического возраста и зараженности клещей возбудителем туляремии.Материалы и методы. За период с 2015 по 2019 гг. на зараженность туляремией исследовано 8449 экз. Dermacentor marginatus (916 пулов), 8674 экз. D. reticulatus (705 пулов) и 109 экз. D. niveus (40 пулов). Для оценки зависимости обнаружения возбудителя туляремии в клещах разного физиологического возраста нами за период с 2016 по 2019 гг. исследовано 2440 экз. D. marginatus (360 пулов) и 3349 экз. D. reticulatus (412 пулов). Исследования на зараженность иксодовых клещей возбудителем туляремии проводили в лаборатории природно-очаговых инфекций Ставропольского противочумного института. Пулы иксодовых клещей исследовали на наличие ДНК возбудителя туляремии с использованием наборов реагентов для выявления ДНК Francisella tularensis методом полимеразной цепной реакции с гибридизационно-флуоресцентным учетом результатов в режиме реального времени.Результаты и обсуждение. Зараженность клещей возбудителем туляремии в Центральном Предкавказье в разные годы колеблется в пределах 0,044–1,127% у D. marginatus и 0,035–1,455% у D. reticulatus. В наибольшем количестве F. tularensis выделяли от клещей III физиологического возраста. Для клещей D. reticulatus не выявлено статистически значимой зависимости обнаружения возбудителя туляремии от физиологического возраста

Analysis of Crimean Hemorrhagic Fever Morbidity Rates in the Russian Federation in 2017 and Prognosis for 2018

This paper presents the analysis of Crimean hemorrhagic fever (CHF) morbidity rates in Russia in 2017; summarized are the results of epidemiological survey of the territory of the natural CHF focus in the south of the European part of Russia, discussed are the results of genetic typing of CCHF virus isolates. In 2017, the Russian Federation reported 78 cases of CHF. Decrease in the incidence of CHF occurred in the Volgograd Region, Stavropol Territory, Astrakhan Region, Republic of Kalmykia, and Rostov Region. For the first time since 1967, CHF case has been identified in Crimea Republic. It is expected that the level of epizootic activity of CHF natural focus in Russia in 2018 will be at least equal to 2017. In case of favorable for Ixodidae ticks weather and climate conditions of the winter 2017–2018, as well as untimely acaricidal treatments, the number of Ixodidae ticks may increase, which along with the high scale of CCHF virus infection in ticks, will contribute to the increase in CHF incidence