279 research outputs found
Ergasiophytes in the urban flora of Belgorod (Russia)
Having been reinforced recently economic links between regions create conditions for the emerging of the role of the adventive element of the synanthropic flora. Active introduction of different species of plants made by city residents in the yards, garden-plots, garden patches and grave yards contributes to it as well as the activities of various municipal forestry firms and botanic garden, which is situated in Belgoro
Peculiarities in plant communitiesβ formation in crop plantings in the south-eastern part of the Central Russian Upland
The article describes a study of plant communities of the south-western part of the Central Russian Upland that form in batches of various crops. Field studies employed the methods of reconnaissance floristic survey. Species diversity of the plant complexes and plant communities were studied with the morphological-ecological-geographical metho
Nucleophilic Addition of Indoles to Carborancarboxaldehyde β a Convinient Synthetic Strategy Towards Novel Boron-Enriched 3-Indolylmethanols
This work was supported by Russian Science Foundation (Project 18-13-00365)
HDL apoprotein immunization induces T cell-mediated venulitis and inflammation in aorta
The hypothesis that atherosclerotic processes are mostly caused by immune (autoimmune) mechanisms has recently been gaining attraction. At the same time, the autoimmune hypothesis of atherogenesis has not become generally accepted and requires additional evidence. Previously, we were able to induce changes in the aortic wall similar to those observed in the early stages of human atherosclerosis, and also to produce visceral obesity in normocholesterolaemic Wistar rats by a single immunization with human native high- or low-density lipoproteins. We also found that the immune response to native human HDL causes atherosclerosis-like lesions in the rabbit aorta, such as adipocyte and chondrocyte metaplasia, proteoglycan deposits, and leukocyte infiltration. Atherosclerosis-like lesions developed in the aorta of hnHDL-immunized rabbits against a background of normal blood LDL-cholesterol level. Thus, an immune response against HDL or LDL may be an independent cause of atherogenesis. The aim of this study was to test whether immunization with human HDL apoproteins (apoA1 and apoE proteins) would induce atherosclerosis-like lesions in the aorta of normocholesterolemic Wistar rats. HDL apoproteins were isolated from human or rat plasma. Wistar rats (n = 5) aged 2 months were used for immunization with human HDL apoproteins. HDL apoproteins were administered as a single intradermal injection of 100 mg per rat in incomplete Freundβs adjuvant. Control rats were injected subcutaneously with incomplete Freundβs adjuvant (n = 5). Rats were dissected 25 weeks after immunization. Rat aorta sections were stained with hematoxylin and eosin for light microscopy. T lymphocytes infiltration was determined by immunohistochemical staining with FITC-labeled antibodies specific to rat CD3. CD3+T lymphocytes were detected using an Olympus BX53 fluorescent microscope. The level of antibodies to human and rat HDL apoproteins was determined by indirect enzyme-linked immunosorbent assay. Immunization with HDL apoproteins induced a T cell mediated immune response without production of autoantibodies to HDL apoproteins. The aortic intima and adventitia were infiltrated with T lymphocytes in rats immunized with HDL apoproteins. Pronounced T lymphocytic infiltration was found in all layers of the vein wall in rats immunized with human HDL apoproteins. Thus, immunization with HDL apoproteins causes T cell mediated inflammation of the aorta and venulitis
Torsion of the cyst of the right ovary in a pregnant woman and tactics of warfare
The tactics of management and treatment of patients with uterine appendages torsion fully depends on the duration of pregnancy, as well as concomitant pathology, both from the mother and the fetus.Π’Π°ΠΊΡΠΈΠΊΠ° Π²Π΅Π΄Π΅Π½ΠΈΡ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠΊ ΠΏΡΠΈ ΠΏΠ΅ΡΠ΅ΠΊΡΡΡΠ΅ ΠΏΡΠΈΠ΄Π°ΡΠΊΠΎΠ² ΠΌΠ°ΡΠΊΠΈ Π² ΠΏΠΎΠ»Π½ΠΎΠΉ ΠΌΠ΅ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΡΠΎΠΊΠ° Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΡΡΠΈ ΠΈ ΡΠΎΠΏΡΡΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ, ΠΊΠ°ΠΊ ΡΠΎ ΡΡΠΎΡΠΎΠ½Ρ ΠΌΠ°ΡΠ΅ΡΠΈ, ΡΠ°ΠΊ ΠΈ ΠΏΠ»ΠΎΠ΄Π°
Torsion of the cyst of the right ovary in a pregnant woman and tactics of warfare
The tactics of management and treatment of patients with uterine appendages torsion fully depends on the duration of pregnancy, as well as concomitant pathology, both from the mother and the fetus.Π’Π°ΠΊΡΠΈΠΊΠ° Π²Π΅Π΄Π΅Π½ΠΈΡ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠΊ ΠΏΡΠΈ ΠΏΠ΅ΡΠ΅ΠΊΡΡΡΠ΅ ΠΏΡΠΈΠ΄Π°ΡΠΊΠΎΠ² ΠΌΠ°ΡΠΊΠΈ Π² ΠΏΠΎΠ»Π½ΠΎΠΉ ΠΌΠ΅ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΡΡΠΎΠΊΠ° Π±Π΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΡΡΠΈ ΠΈ ΡΠΎΠΏΡΡΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ, ΠΊΠ°ΠΊ ΡΠΎ ΡΡΠΎΡΠΎΠ½Ρ ΠΌΠ°ΡΠ΅ΡΠΈ, ΡΠ°ΠΊ ΠΈ ΠΏΠ»ΠΎΠ΄Π°
The first search for bosonic super-WIMPs with masses up to 1 MeV/c with GERDA
We present the first search for bosonic super-WIMPs as keV-scale dark matter
candidates performed with the GERDA experiment. GERDA is a neutrinoless
double-beta decay experiment which operates high-purity germanium detectors
enriched in Ge in an ultra-low background environment at the Laboratori
Nazionali del Gran Sasso (LNGS) of INFN in Italy. Searches were performed for
pseudoscalar and vector particles in the mass region from 60 keV/c to 1
MeV/c. No evidence for a dark matter signal was observed, and the most
stringent constraints on the couplings of super-WIMPs with masses above 120
keV/c have been set. As an example, at a mass of 150 keV/c the most
stringent direct limits on the dimensionless couplings of axion-like particles
and dark photons to electrons of and
at 90% credible interval,
respectively, were obtained.Comment: 6 pages, 3 figures, submitted to Physical Review Letters, added list
of authors, updated ref. [21
West Nile Fever: Results of Monitoring over the Causative Agent in the Russian Federation in 2021, the Incidence Forecast for 2022
The epidemiological situation on West Nile fever (WNF) in Russia in 2021 was characterized by an increase in the incidence relative to 2020 (more than 6-fold increase). The peculiarities of the WNF epidemic process have been determined: the territorial distribution of cases (75 % β in the constituent entities of the Central Federal District), the expansion of the causative agentβs areal with the involvement of new territories (official registration of cases in Moscow and the Tula Region for the first time ever), the early end of the epidemic season. An increase in the proportion of neuroinvasive forms, an increase in the share of male patients and the age group of 30β39 years, a decrease in the proportion of the population in contact with the pathogen in natural places of mass recreation were observed in the incidence structure. According to the results of the monitoring studies carried out by the Reference Center, intensive circulation of the pathogen was established on the territory of the Central Federal District, Southern Federal District, and the North Caucasian Federal District. The low reported incidence was due to insufficient detection of WNF patients. The results of moleculargenetic study showed that in the European part of Russia, WNV lineage 2 circulated in both epizootic and epidemic cycles, lineage 2 in the south of Western Siberia (Omsk Region) and lineage 4 in the Volgograd Region β in the epizootic cycle only. Phylogenetic analysis revealed that strains isolated from the Astrakhan, Volgograd, Rostov, Voronezh Regions and the Republic of Dagestan in 2021 belong to the genovariant of WNV lineage 2 not registered in Russia previously. Β The topology of the phylogenetic tree indicates the possible African origin of the isolates, probably imported into Russia by migratory birds across the coast of the Caspian Sea. In the Volgograd Region, WNV of both the entrenched clade of lineage 2 (since 2007) and new genovariant circulated. The specialists of the Reference Center developed a forecast of WNF epidemiological situation development in the Volgograd Region in 2022 on the basis of the neural network modeling technique, according to which an increase in the incidence is expected, comparable to that in 2010 and 2012. Based on the climate projections, an increase in the incidence is possible in all Federal Districts of the European part of Russia, the southern territories of the Urals, Western Siberia, and the Far East
Features of surface modification of copper-based alloys under powerful plasma exposures
Paper presents features of plasma alloying of Cu-based materials with Ti-Cr, Ti-Cr-Ti-Nb, Ti-Cr-Ti-Zr, Ti-Cr-TiZrO coatings in different regimes of the QSPA Kh-50. Targets were made from copper samples covered of
multilayer PVD coatings have been deposited within a Bulat-type facility. Prepared targets were irradiated with
powerful plasma streams with energy loads achieved 0.6 MJ/m2
and the pulse duration of 0.25 ms. Influence of
plasma impacts on modification different copper alloys has been analyzed. Mechanisms of modification of thin
multilayered coatings mixed with Π‘u substrate in a liquid phase under the plasma processing are evaluated.ΠΠΏΠΈΡΠ°Π½ΠΎ ΠΎΡΠΎΠ±Π»ΠΈΠ²ΠΎΡΡΡ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠ³ΠΎ Π»Π΅Π³ΡΠ²Π°Π½Π½Ρ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»ΡΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ ΠΌΡΠ΄Ρ Π· ΠΏΠΎΠΊΡΠΈΡΡΡΠΌΠΈ Ti-Cr, Ti-Cr-Ti-Nb, TiCr-Ti-Zr, Ti-Cr-Ti-ZrO Π² ΡΡΠ·Π½ΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΠΠ‘ΠΠ Π₯-50. ΠΡΠΎΠ°Π½Π°Π»ΡΠ·ΠΎΠ²Π°Π½ΠΎ Π²ΠΏΠ»ΠΈΠ² ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΡ
Π½Π°Π²Π°Π½ΡΠ°ΠΆΠ΅Π½Ρ Π½Π°
ΠΌΠΎΠ΄ΠΈΡΡΠΊΠ°ΡΡΡ ΡΡΠ·Π½ΠΈΡ
ΠΌΡΠ΄Π½ΠΈΡ
ΡΠΏΠ»Π°Π²ΡΠ². ΠΡΠ°Π·ΠΊΠΈ Π±ΡΠ»ΠΎ Π²ΠΈΠ³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΎ Π· ΠΌΡΠ΄Ρ ΡΠ° Π±Π°Π³Π°ΡΠΎΡΠ°ΡΠΎΠ²ΠΈΡ
ΠΏΠΎΠΊΡΠΈΡΡΡΠ², ΡΠΊΡ
ΡΡΠ²ΠΎΡΡΠ²Π°Π»ΠΈΡΡ PVD-ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π² ΡΡΡΠ°Π½ΠΎΠ²ΡΡ Π±ΡΠ»Π°ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΏΡ. ΠΡΠ΄Π³ΠΎΡΠΎΠ²Π»Π΅Π½Ρ ΠΌΡΡΠ΅Π½Ρ ΠΎΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°Π»ΠΈΡΡ ΠΏΠΎΡΡΠΆΠ½ΠΈΠΌΠΈ
ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΈΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ Π· Π΅Π½Π΅ΡΠ³Π΅ΡΠΈΡΠ½ΠΈΠΌΠΈ Π½Π°Π²Π°Π½ΡΠ°ΠΆΠ΅Π½Π½ΡΠΌΠΈ, ΡΠΎ Π΄ΠΎΡΡΠ³Π°Π»ΠΈ 0,6 ΠΠΠΆ/ΠΌ
2
, Π· ΡΡΠΈΠ²Π°Π»ΡΡΡΡ ΡΠΌΠΏΡΠ»ΡΡΡ
~ 0,25 ΠΌΡ. ΠΠ±Π³ΠΎΠ²ΠΎΡΡΡΡΡΡΡ ΠΌΠ΅Ρ
Π°Π½ΡΠ·ΠΌΠΈ ΠΌΠΎΠ΄ΠΈΡΡΠΊΠ°ΡΡΡ ΡΠΎΠ½ΠΊΠΈΡ
Π±Π°Π³Π°ΡΠΎΡΠ°ΡΠΎΠ²ΠΈΡ
ΠΏΠΎΠΊΡΠΈΡΡΡΠ², Π·ΠΌΡΡΠ°Π½ΠΈΡ
Π· ΠΌΡΠ΄Π½ΠΎΡ
ΠΏΡΠ΄ΠΊΠ»Π°Π΄ΠΊΠΎΡ Π² ΡΡΠ΄ΠΊΡΠΉ ΡΠ°Π·Ρ ΠΏΡΠΈ ΠΏΠ»Π°Π·ΠΌΠΎΠ²ΠΎΠΌΡ ΠΎΠΏΡΠΎΠΌΡΠ½Π΅Π½Π½Ρ.ΠΠΏΠΈΡΠ°Π½Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π»Π΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² Π½Π° ΠΌΠ΅Π΄Π½ΠΎΠΉ ΠΎΡΠ½ΠΎΠ²Π΅ Ρ ΠΏΠΎΠΊΡΡΡΠΈΡΠΌΠΈ Ti-Cr, Ti-CrTi-Nb, Ti-Cr-Ti-Zr, Ti-Cr-Ti-ZrO Π² ΡΠ°Π·Π½ΡΡ
ΡΠ΅ΠΆΠΈΠΌΠ°Ρ
ΠΠ‘ΠΠ£ Π₯-50. ΠΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΡ
Π½Π°Π³ΡΡΠ·ΠΎΠΊ Π½Π° ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΡΠ°Π·Π½ΡΡ
ΠΌΠ΅Π΄Π½ΡΡ
ΡΠΏΠ»Π°Π²ΠΎΠ². ΠΠ±ΡΠ°Π·ΡΡ Π±ΡΠ»ΠΈ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½Ρ ΠΈΠ· ΠΌΠ΅Π΄ΠΈ ΠΈ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ, ΠΎΡΠ°ΠΆΠ΄Π΅Π½Π½ΡΡ
PVD-ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π² ΡΡΡΠ°Π½ΠΎΠ²ΠΊΠ΅ Π±ΡΠ»Π°ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΏΠ°. ΠΠΎΠ΄Π³ΠΎΡΠΎΠ²Π»Π΅Π½Π½ΡΠ΅ ΠΌΠΈΡΠ΅Π½ΠΈ ΠΎΠ±Π»ΡΡΠ°Π»ΠΈΡΡ
ΠΌΠΎΡΠ½ΡΠΌΠΈ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΡΠΌΠΈ ΠΏΠΎΡΠΎΠΊΠ°ΠΌΠΈ Ρ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ, Π΄ΠΎΡΡΠΈΠ³Π°Π²ΡΠΈΠΌΠΈ 0,6 ΠΠΠΆ/ΠΌ2
, Ρ
Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡΡ ΠΈΠΌΠΏΡΠ»ΡΡΠ° ~ 0,25 ΠΌΡ. ΠΠ±ΡΡΠΆΠ΄Π°ΡΡΡΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΡ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ ΡΠΎΠ½ΠΊΠΈΡ
ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ, ΡΠΌΠ΅ΡΠ°Π½Π½ΡΡ
Ρ ΠΌΠ΅Π΄Π½ΠΎΠΉ ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΎΠΉ Π² ΠΆΠΈΠ΄ΠΊΠΎΠΉ ΡΠ°Π·Π΅ ΠΏΡΠΈ ΠΏΠ»Π°Π·ΠΌΠ΅Π½Π½ΠΎΠΌ ΠΎΠ±Π»ΡΡΠ΅Π½ΠΈΠΈ
- β¦