Optical Fibers Based on Modified Silver Halide Crystals for Nuclear Power

We investigated the possibility of the deployment of AgBr – TlBr0.46I0.54MIR fibers in high ionizing radiation environment. For this purpose, we exposed plate samples made of AgBr – TlBr0.46I0.54crystals to β-ionizing radiation at a dose of 100 kGy. We revealed the radiation-induced translucence effect for these materials and assumed its nature. As the investigation showed the suitability of the fibers for the application in high ionizing radiation environment, the authors propose to use these fibers jointly with FTIR spectrometers for the online monitoring of various chemical processes at the nuclear power plants. Keywords: modified silver halides, MIR fibers, FTIR spectroscopy, ionizing radiation resistanc

IR Thermographic System Supplied with an Ordered Fiber Bundle for Investigation of Power Engineering Equipment and Units

In this article, the authors propose an IR imaging system, supplied with an IR bundle of ordered silver halide fibers, for the acquisition of 2D temperature field distribution in hard-to-reach places. We assessed crosstalk between neighboring individual fibers of the bundle, carried out calibration of the IR imaging system, and determined modelled defects using this system. The results showed the applicability of the system for the inspection and investigation of power engineering units. Keywords: IR fiber bundles, IR thermography, internal defects detectio

Spectral oil analyzer

We worked out a spectral oil analyzer, implemented the method of Fourier transform infrared spectroscopy, which allow simultaneous detecting characteristic peaks of water absorption and sulfur-containing substances in oil within the wavelength range from 0.2 to 25.0 μm. The usage of fiber-optic delivering channels makes it possible to produce online industrial probes for the control of chemical composition and concentration, what is demanded at oil producing platforms and oil refinery plants. As identifiers, we used the most intense absorption peaks of water (λ - 1.45 μm, 1.95 μm, 3.00 μm, 6.00 μm), oil (λ - 1.72 μm, 2.31 μm, 3.41 μm) and sulfur-containing heterocycles (λ - 8.00 μm). The spectral analyzer consists of a broadband-light source, a flow-cell, a fiber-optic assembly, narrow-band optical filters and photodetectors. For delivering a broadband optical signal, a fiber-optic assembly was developed. It comprises silica fibers and polycrystalline fibers derived from solid solutions of silver and thallium (I) halides. It was calculated the effective area and diameter of each fiber type in the assembly, taking into account attenuation coefficients and overall optical losses of the system. Using eight channels for the probe at the same time, we were able to measure the content of water and sulfur-containing substances in oil in concentrations from 0.1 to 100.0 wt %. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-73-10063This work was supported by the Russian Science Foundation under grant No. 18-73-10063

Processing Specialised Congruent Collocations by L1-Russian Esp Learners (Optics)

This study is one of the first steps towards developing corpus-based instructional materials for learners of English for Specific Purposes (ESP) in the field of optics. We investigated the effects of perceiving first language (L1) congruency on processing specialised second language (L2) collocations by L1-Russian learners of ESP in optics. For this purpose, first, we compiled a list of congruent collocations in optics using the combination of the corpus-based approach and an expert assessment. Then, we used a lexical decision task, performed by L1-Russian ESP learners, to assess whether these congruent collocations are perceived by the learners the same as by the experts. Having compared accuracy rates and response times, we revealed that, while the vast majority of the congruent collocations were processed quickly and accurately, i. e. as congruent ones, some of them were processed with a delay as if they were incongruent. We discussed these results in terms of choosing the most effective ways to develop teaching-learning materials for enhanced L2 collocation acquisition by L1-Russian ESP learners.Представленное исследование является одним из первых шагов к разработке учебных материалов на основе корпусного подхода для русскоговорящих, изучающих английский язык для специальных целей (English for Specific Purposes, ESP) в области оптики. Авторы исследуют влияние восприятия конгруэнтности родного языка (L1) на обработку специальных словосочетаний (коллокаций) изучаемого языка (L2) и обсуждают эти результаты с точки зрения выбора наиболее эффективных способов разработки учебно-методических материалов для улучшения усвоения коллокаций L2 учащимися ESP.Исследование выполнено при финансовой поддержке постановления № 211 Правительства Российской Федерации, контракт № 02.A03.21.0006; при поддержке РФФИ, грант № 19-012-00104

Draft Genome Sequences of Strains \u3ci\u3eSalinicola socius\u3c/i\u3e SMB35\u3csup\u3eT\u3c/sup\u3e, \u3ci\u3eSalinicola\u3c/i\u3e sp. MH3R3-1 and \u3ci\u3eChromohalobacter\u3c/i\u3e sp. SMB17 From the Verkhnekamsk Potash Mining Region of Russia

Halomonads are moderately halophilic bacteria that are studied as models of prokaryotic osmoadaptation and sources of enzymes and chemicals for biotechnological applications. Despite the progress in understanding the diversity of these organisms, our ability to explain ecological, metabolic, and biochemical traits of halomonads at the genomic sequence level remains limited. This study addresses this gap by presenting draft genomes of Salinicola socius SMB35T, Salinicola sp. MH3R3–1 and Chromohalobacter sp. SMB17, which were isolated from potash mine tailings in the Verkhnekamsk salt deposit area of Russia. The analysis of these genomes confirmed the importance of ectoines and quaternary amines to the capacity of halomonads to tolerate osmotic stress and adapt to hypersaline environments. The study also revealed that Chromohalobacter and Salinicola share 75–90% of the predicted proteome, but also harbor a set of genus-specific genes, which in Salinicola amounted to approximately 0.5 Mbp. These genus-specific genome segments may contribute to the phenotypic diversity of the Halomonadaceae and the ability of these organisms to adapt to changing environmental conditions and colonize new ecological niches

Improvements in Infrared Thermography-Based Diagnostics of Skin Abnormalities

In this study, we present a way to increase the effectiveness of infrared thermography imaging as a tool for the medical diagnosis of various skin diseases. We expect that this im-proved technique will allow a more accurate diagnosis of cancer

Influence of geometrical parameters on transmitting thermal radiation through silver halide fibers

In this study, we experimentally determined the influence of fibers’ geometrical parameters on the performance of fiber-optic temperature control system based on silver halide fibers at the temperatures of 295–395 K. It was revealed that the fiber diameter can affect thermal radiation transmission in the case of mismatching light beam diameters between system's optical elements and it should be taken into consideration when such systems are developed. A fiber length reduction leads to a linear increase in transmission values. We also assessed transmission losses for the fibers bent at various radii and derived some empirical equations for calibration curves. The revealed dependencies can be very useful for designing fiber-optic systems intended for remote temperature measurements and control of heating-power facilities’ thermal regimes. © 2020 The AuthorsRussian Science Foundation, RSF: 18-73-10063This work was supported by the Russian Science Foundation under grant No. 18-73-10063

Multimodal characterization of broadband, polycrystalline silver halide fibre bundle for confocal laser scanning microscopy in the near-mid infrared spectra

This work was supported by the Russian Science Foundation under grant No. 18-73-11063

Utilization of Immunoblotting in Studies of Epitope Targeting in Monoclonal Antibodies to Melioidosis Agent Antigen 200 kDa

Objective of the research was to use immunoblotting for studies of epitope targeting in monoclonal antibodies to 200 kDa Burkholderia pseudomallei antigen, which are synthesized by hybridomas-producers from the two collections in the laboratory of immunodiagnostics and biotechnology at the premises of Volgograd Research Anti-Plague Institute. Employed were 8 typical strains of melioidosis agent with the complete antigenic structure. Antigen preparations were separated by means of denaturating vertical electrophoresis in 12 % polyacrylamide gel with 0.1 % sodium dodecylsulfate. During the process of cell-replication, 12 hybridomas-producers were given preparative amounts of monoclonal antibodies to 200 kDa Burkholderia pseudomallei glycoprotein. Following that, immunoperoxidase conjugates were manufactured. Epitope targeting of monoclonal antibodies was evaluated using immunoblotting. With the help of vertical electrophoresis identified was the presence of several mandatory major components contained in the antigen complexes of the salt-water and formamid B. pseudomallei extracts . Differential staining substantiated glycoprotein origin of certain antigen components. Immunoblotting with the stated above antigen preparations revealed epitope targeting of a number of monoclonal antibodies to 200 kDa antigen of melioidosis agent; demonstrated were the differences in their specific interaction with biopolymers which form part of the antigen specter. Those differences were characteristic of hybridomas-producers belonging to different collections, as well as of particular strains of B. pseudomallei