RESEARCH OF THE DYNAMICS OF NON-DIFFRACTION AIRY SECTION PULSES IN THE ENVIRONMENT OF CARBON NANOTUBES

The problem of the propagation dynamics of optical pulses (light bullets) with an Airy profile in an inhomogeneous medium of carbon nanotubes is considered. It is shown numeri-cally that the proposed type of beam exhibits a steady and stable propagation

Relative luminosity measurement of the LHC with the ATLAS forward calorimeter

In this paper it is shown that a measurement of the relative luminosity changes at the LHC may be obtained by analysing the currents drawn from the high voltage power supplies of the electromagnetic section of the forward calorimeter of the ATLAS detector. The method was verified with a reproduction of a small section of the ATLAS forward calorimeter using proton beams of known beam energies and variable intensities at the U-70 accelerator at IHEP in Protvino, Russia. The experimental setup and the data taking during a test beam run in April 2008 are described in detail. A comparison of the measured high voltage currents with reference measurements from beam intensity monitors shows a linear dependence on the beam intensity. The non-linearities are measured to be less than 0.5 % combining statistical and systematic uncertainties.Comment: 16 page

Изучение взаимодействия IL-4 и IL-4δ2 с рецепторами IL-4R I и II типов in silico и их эффектов на функциональную активность мононуклеарных клеток in vitro

Alternatively spliced interleukins are very actively studied over the last years. Splice form of IL-4 — IL-4δ2 has antagonistic effects to its full form on proliferative activity of human mononuclear blood cells and their IL-6 production. Antagonistic effects between IL-4 and IL-4δ2 were confirmed and explained in this study due to combination of biochemical and computer methods.Исследование продуктов альтернативного сплайсинга цитокинов представляет значительный научный интерес. Продукт альтернативного сплайсинга интерлейкина-4 (IL-4) — IL-4δ2 обладает антагонистическим по сравнению с IL-4 действием на пролиферативную активность мононуклеарных клеток крови человека и продукцию ими IL-6. Сочетание биохимических и компьютерных методов исследования позволило подтвердить и объяснить наличие у IL-4δ2 свойств антагониста по отношению к своему полноразмерному варианту — IL-4

Management of Epizootiological Investigation in the Context of Mass Event (by the Example of the XXVII Worldwide Summer Universiade in Kazan, 2013)

In consequence of epizootiological investigation, differentiated has been Kazan territory according to the potential epidemic hazard levels; determined is the abundance of carriers and vectors of natural-focal infection agents in and around the territory of the Summer Universiade-2013; substantiated is the scope of preventive measures (disinfection, deratization, desinsection), as well as their frequency and coverage area. Timely detection of the regions with expressed epizootic potential growth has made it possible to carry out prophylactic activities and reach an epidemic-hazard-lowering effect as regards particular territories of the natural and anthropourgic infectious disease foci. Further on, validated has been disinfection as part of specific prophylaxis and as a basic measure for elimination of risks of the population exposure to natural-focal infections directly during the mass event

Proteomic Analysis of Neisseria gonorrhoeae Biofilms Shows Shift to Anaerobic Respiration and Changes in Nutrient Transport and Outermembrane Proteins

Neisseria gonorrhoeae, the causative agent of gonorrhea, can form biofilms in vitro and in vivo. In biofilms, the organism is more resistant to antibiotic treatment and can serve as a reservoir for chronic infection. We have used stable isotope labeling by amino acids in cell culture (SILAC) to compare protein expression in biofilm and planktonic organisms. Two parallel populations of N. gonorrhoeae strain 1291, which is an arginine auxotroph, were grown for 48 h in continuous-flow chambers over glass, one supplemented with 13C6-arginine for planktonic organisms and the other with unlabeled arginine for biofilm growth. The biofilm and planktonic cells were harvested and lysed separately, and fractionated into three sequential protein extracts. Corresponding heavy (H) planktonic and light (L) biofilm protein extracts were mixed and separated by 1D SDS-PAGE gels, and samples were extensively analyzed by liquid chromatography-mass spectrometry. Overall, 757 proteins were identified, and 152 unique proteins met a 1.5-fold cutoff threshold for differential expression with p-values <0.05. Comparing biofilm to planktonic organisms, this set included 73 upregulated and 54 downregulated proteins. Nearly a third of the upregulated proteins were involved in energy metabolism, with cell envelope proteins making up the next largest group. Of the downregulated proteins, the largest groups were involved in protein synthesis and energy metabolism. These proteomics results were compared with our previously reported results from transcriptional profiling of gonococcal biofilms using microarrays. Nitrite reductase and cytochrome c peroxidase, key enzymes required for anaerobic growth, were detected as highly upregulated in both the proteomic and transcriptomic datasets. These and other protein expression changes observed in the present study were consistent with a shift to anaerobic respiration in gonococcal biofilms, although changes in membrane proteins not explicitly related to this shift may have other functions

Factors that Predetermined Activation of Plague Epizooties in the Pre-Caspian Sandy Natural Focus in 2014

In 2014, in the central coastal part of the Pre-Caspian sandy natural plague focus, activation of epizootic process in the complex rodent settlements occurred. Objective of the study was to identify the factors that predetermined the development of intensive and extensive plague epizooties. Utilized were operational data from the Astrakhan, Elista, and Dagestan plague control stations, and personal investigation records gathered in the focus. Consequently to the high baseline numbers of rodents and fleas, mild winter weather in 2013-2014 population density of the vectors and carriers of the infection significantly exceeded long-term average annual indexes in the following spring. Total abundance rates reached up to 31.1 specimens per a hectare, being lowered up to 17.8 by the fall. Stock of the main vector of plague, N. laeviceps flea, amounted to 350 and to 120 per a hectare in the spring and autumn, respectively. All in all, in the course of the three rolling seasons isolated were 56 Y. pestis cultures: 17 strains - from the rodents, and 39 - from the fleas. The overall epizootic area totaled to 2300 km2. Plague epizooties were registered in the zone of sustained natural focality within the bonds of the Ilmen-Pridelta, Primorsky, and Chernozemelsky landscape-epizootic regions in the administrative territory of the Limansky District in the Astrakhan Region, Lagansky and Chernozemelsky Regions of the Republic of Kalmykia, and Tarumovsky Region of the Republic of Dagestan. Results of monitoring over the epizootic manifestations and plague carrier and vector abundance dynamics provided the basis for scheduling and performance of anti-epidemic activities, as well as for forecasting of the epidemic situation development in the focus

The Conditions For Producing of New Iron-Based Filler Alloy For The Reconstruction Of Varied Machines' And Equipment' Parts By Mechanical Alloying Method.

The perspectives of mechanical alloying method for obtaining of new iron-based filler alloy for recovery of railway equipment has been shown. Composition of the developed material has been proposed and requirements to the new alloy have been set