H-index of the most cited co-author from among TPU scientists is 64. The IF of the most rated journal were TPU scientists published their articles, makes 13.324 (StrAU Unconventional Natural Resources).
At the end of November, an open seminar How to win a grant on a research project? was held at the University. It was delivered by Dmitri Glushkov, an associate professor of the Department of Automation of Heat Power Processes, the head of five scientific research projects at the RF President Council on Grants and RFBR. You can view his presentation at the link.
Useful information on how to increase your publication activity, as well as ongoing university seminars and other events for the authors of scientific articles, are available at the Office for Development of Publication Activity’s accounts at Vkontakte and Facebook.
Unconventional Natural Resources
Mekhman Yusubov, head of the Department of Technology of Organic Substances and Polymer Materials, Frensis Verpoort, a professor at the Department of Technology of Organic Substances and Polymer Materials.
Journal: Chemistry Reviews (IF 13.324; Q1)
Metal–organic polyhedra (MOPs) have attracted great interest in the past decade. As a new series of nano-material, MOPs have high outer and inner specific surface areas and are able to be applied in different areas such as catalysis, gas sequestration, drug delivery, molecule sensing, etc.
In this review, the focus is made on the design and synthetic strategies approaching edge-bridged tetrahedra MnL6 and face-capped tetrahedra MnL4. Besides the synthesis, structure, and properties of tetrahedral self-assemblies are also considered, while tetrahedra will be compared with other complicated multinuclear constructions. The discussion of how the properties of tetrahedral cages can be altered by varying employed subcomponents is made. Moreover, the multifarious host–guest system and behavior of metal–organic tetrahedral self-assemblies for catalytic applications are addressed in details.
Fransis Verpoort, a professor at the Department of Technology of Organic Substances and Polymer Materials, et al.
Journal: Renewable & Sustainable Energy Reviews (IF 8.05; Q1)
Biogas is a renewable fuel source of methane that can be used as energy for vehicles after a purification process to remove impurities (Biogas upgrading and cleaning). However, removal of CO2 from methane is one of the critical steps for biogas upgrading and is limiting its commercial application. An overview of the materials in technologies of separation (membrane) and sorption (sorbents) know-how, including chemisorbents and physisorbents, has been made with a particular emphasis on biogas upgrading. The alternative properties and possibilities of different technologies and materials for CO2 separation, including alkanol amine, solid alkanol amine, zeolites, carbonaceous, metal-organic frameworks (MOFs), zeolitic imidazolate frameworks (ZIFs), and membrane applied for purifying raw biogas (upgrading) to produce bio-methane and on the other hand, to reduce CO2 emission from fossil fuel are discussed in this review.
Emilia Ivanchina, a professor at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Elena Ivashkina, a professor at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Irena Dolganova, a research fellow at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Evgeniya Frantsina, a research fellow at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Igor Dolganov, an associate professor at the Department of Chemical Engineering of Fuels and Chemical Cybernetics.
Journal: Chemical Engineering Journal (IF 6,216; Q1)
ASA is the main ingredient of many commercial formulations for industrial and domestic synthetic detergents. Studying the work of the technological equipment that is used for manufacturing of the linear ASA allow us to conclude that alkylaromatic hydrocarbons in the product flow to hydrogenation reactor have significant impact on all technological stages. The aim of this work was to estimate the quantitative impact of alkyl components on ASA manufacturing efficiency and to improve the performance of the main equipment. The performed infrared (IR) and gas chromatography–mass spectrometry (GC–MS) analysis of the linear alkylbenzenes (LAB) and ASA samples indicate that the viscous components are tetralines and sultones as a part of unsulphonated matter. The developed mathematical model was used to reveal the following results and regularities of equipment modes: if the hydrogen/feedstock molar ratio at dehydrogenation stage equals 6/1, it is less optimal due to coke formation and requires increasing water supply. An increase of aromatics content in alkylation product flow leads to an increase in HF flow rate to the regeneration column. The optimal SO3/LAB molar ratio increases along with content of aromatics in raw materials. The developed model of sulfonation process predicts the duration of reactor inter-washing period.
Natalia Belinskaya, an assistant at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Evgeniya Frantsina, a research fellow at the Department of Chemical Engineering of Fuels and Chemical Cybernetics, Emilia Ivanchina, a professor at the Department of Chemical Engineering of Fuels and Chemical Cybernetics.
Journal: Chemical Engineering Journal (IF 6.216; Q1)
This work presents the results of the mathematical modelling of the industrial catalytic dewaxing process, which is aimed to produce the components of low-freezing diesel fuel. The dewaxing catalyst deactivation degree is evaluated. Application of the developed mathematical model for estimating the influence of the technological parameters and feedstock composition on the target product yield and properties is considered. The calculation results are given for the optimal technological modes for various feedstock compositions. The way to improve the efficiency of the stabilizer column operation as one of the stages of the dewaxing process is proposed.
Olga Guselnikova, an engineer at the Department of Technology of Organic Substances and Polymer Materials, Pavel Postnikov, an associate professor at the Department of Technology of Organic Substances and Polymer Materials, Maria Erzina, a PhD student at the Department of Technology of Organic Substances and Polymer Materials, Evgeniya Kalachyova, an assistant at the Department of Technology of Organic Substances and Polymer Materials, Svorcik V. (h-index: 36), Oleksiy Lyutakov, JRF at the Department of Technology of Organic Substances and Polymer Materials.
Journal: Sensors and Actuators B: Chemical (IF 5,401; Q1)
Here we report a surface plasmon-polariton based functionalized SERS platform for the detection of heavy metal ions. Homogenous distribution of the plasmon intensity on the ordered plasmon structure and high affinity of diethylenetriaminepentaacetic acid (DTPA) to heavy metal ions allows the efficient entrapping of heavy metal ions as well as their selective and sensitive detection (LOD was found 10−14 M). Periodical gold structure was created using the excimer laser beam treatment of polymer surface and further coating by gold. DTPA molecules were covalently attached to the gold surface through the two step procedure: (i) grafting of 4-aminophenylene groups via diazonium chemistry and (ii) their acylation by DTPA-anhydride. Grafted DTPA molecules showed high SERS response, due to the SPP excitation and propagation on the gold grafting. Efficient chelating of heavy metal ions by DTPA molecules from solution results in pronounced changes of their SERS response. The shift of carbonyl Raman peak position was found to be dependent on the atomic number of heavy metal ions, enabling the selective detection even in the mixture of few metals. Applied SERS platform can be realized using the portable SERS spectrophotometer and requires the minimal equipment cost as well as the experimental time.
Andersson A. (h-index: 22), Igor Semiletov, a professor at the Department of Geology and Minerals Prospecting, Gustafsson O. (h-index: 55) et al.
Journal: Global Biogeochemical Cycles (IF 4,655; Q1)
Black carbon (BC) plays an important role in carbon burial in marine sediments globally. Yet the sequestration of BC in the Arctic Ocean is poorly understood. Here we assess the concentrations, fluxes, and sources of soot BC (SBC)—the most refractory component of BC—in sediments from the East Siberian Arctic Shelf (ESAS), the World's largest shelf sea system. SBC concentrations in the contemporary shelf sediments range from 0.1 to 2.1 mg g−1 dw, corresponding to 2–12% of total organic carbon. The 210Pb-derived fluxes of SBC (0.42–11 g m−2 yr−1) are higher or in the same range as fluxes reported for marine surface sediments closer to anthropogenic emissions. The total burial flux of SBC in the ESAS (~4,000 Gg yr−1) illustrates the great importance of this Arctic shelf in marine sequestration of SBC. The radiocarbon signal of the SBC shows more depleted yet also more uniform signatures (−721 to −896‰; average of −774 ± 62‰) than of the non-SBC pool (−304 to −728‰; average of −491 ± 163‰), suggesting that SBC is coming from an, on average, 5,900 ± 300 years older and more specific source than the non-SBC pool. We estimate that the atmospheric BC input to the ESAS is negligible (~0.6% of the SBC burial flux). Statistical source apportionment modeling suggests that the ESAS sedimentary SBC is remobilized by thawing of two permafrost carbon (PF/C) systems: surface soil permafrost (topsoil/PF; 25 ± 8%) and Pleistocene ice complex deposits (ICD/PF; 75 ± 8%). The SBC contribution to the total mobilized permafrost carbon (PF/C) increases with increasing distance from the coast (from 5 to 14%), indicating that the SBC is more recalcitrant than other forms of translocated PF/C. These results elucidate for the first time the key role of permafrost thaw in the transport of SBC to the Arctic Ocean. With ongoing global warming, these findings have implications for the biogeochemical carbon cycle, increasing the size of this refractory carbon pool in the Arctic Ocean.
Igor Minin, SRF at the Department of Precise Instrument Making, et al.
Journal: Physical Review Applied (IF 4,808; Q1)
We report on measurements of a subwavelength focusing of an ultrasound beam by a polymer ball-shaped lens (Rexolite) immersed in water at room temperature. The beam arises in the near field of the ball-lens shadow side. Considering a 8.2λ-diameter ball lens, with λ being the wavelength, we find a superfocused beam with 14.4-dB-intensity gain, a full width and a full length at half maximum of λ/2
and 2.2λ, respectively, and sidelobes under −10dB. The observed phenomenon is in excellent agreement with the theoretical and computational predictions based on the partial-wave expansion and finite-element methods. Our results may foster the design of simple lens elements for super-resolution acoustic microscopy and ultrasound imaging.
Alexander A. Rogachev, SRF at the Department of Physical Methods and Devices of Quality Testing, Alexander V. Rogachev, a leading research fellow at the Department of Physical Methods and Devices of Quality Testing, Olga Galtseva, an associate professor at the Department of Physical Methods and Devices of Quality Testing, et al.
Journal: Applied Surface Science (IF 3,387; Q1)
Highly ordered conductive polyaniline (PANI) coatings containing gold nanoparticles were prepared by low-energy electron beam deposition method, with emeraldine base and chloroauric acid used as target materials. The molecular and chemical structure of the layers was studied by Fourier transform infrared, Raman, UV–vis and X-ray photoelectron spectroscopy. The morphology of the coatings was investigated by atomic force and transmission electron microscopy. Conductive properties were obtained by impedance spectroscopy method and scanning spreading resistance microscopy mode at the micro- and nanoscale.
It was found that the emeraldine base layers formed from the products of electron-beam dispersion have extended, non-conductive polymer chains with partially reduced structure, with the ratio of imine and amine groups equal to 0.54. In case of electron-beam dispersion of the emeraldine base and chloroauric acid, a protoemeraldine structure is formed with conductivity 0.1 S/cm. The doping of this structure was carried out due to hydrochloric acid vapor and gold nanoparticles formed by decomposition of chloroauric acid, which have a narrow size distribution, with the most probable diameter about 40 nm. These gold nanoparticles improve the conductivity of the thin layers of PANI + Au composite, promoting intra- and intermolecular charge transfer of the PANI macromolecules aligned along the coating surface both at direct and alternating voltage.
The proposed deposition method of highly oriented, conductive nanocomposite PANI-based coatings may be used in the direct formation of functional layers on conductive and non-conductive substrates.
Alexandr Zaitsev, an assistant at the Department of Nuclear and Thermal Power Plants, Roman Egorov, an associate professor at the Department of Control Systems and Mechatronics, Pavel Strizhak, head of the Department of Heat and Power Processes Automation.
Journal: Fuel (IF 4,601; Q1)
The laser processing becomes more and more popular for different objects and purposes including different fuels and combustibles. We have investigated experimentally some details of the light-induced conversion of the waste-derived coal-water slurry into the syngas. The process was “cold” enough (the temperature of the fuel was less than 350?K). The specific gasification energy strongly depends on the chosen content of the raw fuel and does not exceed the 6?MJ/kg. It was shown that there are two possible alternative processes with dominant production of the hydrogen or methane. The production of the combustible gases is accompanied with generation of certain amounts of SO2 and much less amount of CO.
Sergey Misyura, a leading research fellow at the Department of Heat and Power Processes Automation.
Journal: Scientific Reports (IF 4,259; Q1)
The influence of various factors on the evaporation of drops of water and aqueous salt solution has been experimentally studied. Typically, in the studies of drop evaporation, only the diffusive vapor transfer, radiation and the molecular heat conduction are taken into account. However, vapor-gas convection plays an important role at droplet evaporation. In the absence of droplet boiling, the influence of gas convection turns out to be the prevailing factor. At nucleate boiling, a prevailing role is played by bubbles generation and vapor jet discharge at a bubble collapse. The gas convection behavior for water and aqueous salt solution is substantially different. With a growth of salt concentration over time, the influence of the convective component first increases, reaches an extremum and then significantly decreases. At nucleate boiling in a salt solution it is incorrect to simulate the droplet evaporation and the heat transfer in quasi-stationary approximation. The evaporation at nucleate boiling in a liquid drop is divided into several characteristic time intervals. Each of these intervals is characterized by a noticeable change in both the evaporation rate and the convection role.
People and Technologies
Elena Fell, an associate professor at the Department of Social Communication
Journal: Journal of Communication (IF 3,914; Q1)
The publication is devoted to the study of the specialist in the field of communicative sciences Nimrod Bar-Ama (Sapir College, Israel), in which the scientist offers his model of training future professionals in the field of communicative practices (for example, journalists, educators, politicians), taking into account the problems and peculiarities of network interaction in modern culture. It is noted that now the main problem of teaching students is a high degree of variability in urban culture, as a result of which the teacher is not able to anticipate specific situations and tasks that will face the specialists of the future. In this regard, Bar-Am explores the possibility of searching for fundamental theoretical principles and universal competencies, familiarization with which will allow current students and future professionals to navigate in the unpredictable urban space of the future.
Nuclear Technology for Oncology
Evegeniy Bolbasov, an engineer at the Department of Experimental Physics, Pavel Marien, an engineer at the Department of Experimental Physics, Ksenia Stankevich, an engineer at the Department of Experimental Physics, Anna Kozelskaya, an assistant at the Department of Experimental Physics, Evgeniy Shesterikov, a leading engineer at the Department of Experimental Physics, Julia Khodyrevskaya, a PhD student at the Department of Experimental Physics, Sergey Tvedokhlebov, an associate professor at the Department of Experimental Physics, et al.
Journal: Colloids and Surfaces B: Biointerfaces (IF 3,887; Q1
In this study, we modified the surface of bioresorbable electrospun poly-(l-lactic) acid (PLLA) scaffolds by reactive magnetron sputtering of a titanium target under a nitrogen atmosphere. We examined the influence of the plasma treatment time on the structure and properties of electrospun PLLA scaffolds using SEM, XRF, FTIR, XRD, optical goniometry, and mechanical testing. It was observed that the coating formed did not change physicomechanical properties of electrospun PLLA scaffolds and simultaneously, increased their hydrophilicity. No adverse tissue reaction up to 3 months after subcutaneous implantation of the modified scaffolds was detected in in-vivo rat model. The rate of scaffold replacement by the recipient tissue in-vivo was observed to depend on the plasma treatment time.
Roman Chernozem, an engineer at the Plasma Hybrid System Lab, Maria Surmeneva, SRF at the Plasma Hybrid System Lab, Baumbach T. (h-index: 31), Victor Ignatov, lab’s head at the Department of Technology of Silicates and Nanomaterials, Epple M. K. (h-index: 49), Roman Surmenev, an associate professor at the Department of Experimental Physics, et al.
Journal: Applied Surface Science (IF 3.387; Q1)
In this study, biocomposites based on porous titanium oxide structures and a calcium phosphate (CaP) or hydroxyapatite (HA) coating are described and prepared. Nanotubes (NTs) with different pore dimensions were processed using anodic oxidation of Ti substrates in a NH4F-containing electrolyte solution at anodization voltages of 30 and 60 V with a DC power supply. The external diameters of the nanotubes prepared at 30 V and 60 V were 53 ± 10 and 98 ± 16 nm, respectively. RF-magnetron sputtering of the HA target in a single deposition run was performed to prepare a coating on the surface of TiO2 NTs prepared at 30 and 60 V. The thickness of the CaP coating deposited on the mirror-polished Si substrate in the same deposition run with TiO2 NTs was determined by optical ellipsometry (SE) 95 ± 5 nm. Uncoated and CaP-coated NTs were annealed at 500 °C in air. Afterwards, the presence of TiO2 (anatase) was observed. The scanning electron microscopy (SEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS) and nanoindentation results revealed the influence that the NT dimensions had on the CaP coating deposition process. The tubular surfaces of the NTs were completely coated with the HA coating when prepared at 30 V, and no homogeneous CaP coating was observed when prepared at 60 V. The XRD patterns show peaks assigned to crystalline HA only for the coated TiO2 NTs prepared at 30 V. High-resolution XPS spectra show binding energies (BE) of Ca 2p, P 2p and O 1s core-levels corresponding to HA and amorphous calcium phosphate on TiO2 NTs prepared at 30 V and 60 V, respectively. Fabrication of TiO2 NTs results in a significant decrease to the elastic modulus and nanohardness compared to the Ti substrate. The porous structure of the NTs causes an increase in the elastic strain to failure of the coating (H/E) and the parameter used to describe the resistance of the material to plastic deformation (H3/E2) at the nanoscale level compared to the Ti substrate. Furthermore, only the HA coating on the NTs exhibits a significantly increased H/E ratio and H3/E2 factor compared to the NTs and Ti substrate. Increases in resistance to penetration for the indenter were also observed for HA-coated TiO2 NTs prepared at 30 V compared to uncoated and CaP-coated NTs prepared at 60 V.
Alexander Potylitsyn, a leading research fellow at the Department of Applied Physics, Strikhanov M. N. (h-index: 64)
Journal: Optics Express (IF 3,307; Q1)
Smith-Purcell effect is well known as a source of monochromatic electromagnetic radiation. In this paper we present the generalized theory of Smith-Purcell radiation from periodic beams. The form-factors describing both coherent and incoherent regimes of radiation are calculated. The radiation characteristics are investigated in two practically important frequency ranges, THz and X-ray, for two modulation profiles, most frequently used in practice – a train of microbunches and a Gaussian-shaped one, characterized by sinusoidal modulation with an arbitrary modulation depth. On the base of the theory developed we show that a modulated electron beam consisting of a set of bunches makes it possible to improve significantly the spectral line monochromaticity of the light emitted, reaching values better than 1% for short gratings. We demonstrate as well that Smith-Purcell radiation can be used for non-destructive diagnostics of the depth of modulation for partially modulated beams. These findings not only open up a new way to manipulate the light emission using Smith-Purcell effect but also promise a profound impact for other radiation sources based on charged particle beams, such as undulator radiation in FELs, next-generation X-ray radiation source based on inverse Compton scattering, in a wide range from THz to X-rays.