Cited Scientists: November 2016

The new issue of the project “Cited Scientists” summarizes polytechnicers’ publication activity in November 2016. Last month 28 articles were published in journals with IF higher than 1. There is an increasing trend in the number of TPU articles in the journals with IF higher than 3 – in November TPU scientists published 16 articles in such outlets. 

The most cited co-author of TPU scientists has H-index=79. The most rated journal published the polytechnicers has IF=12. 339 (in the cluster “Sustainable Energy”).

In 2016 the number of the TPU articles in the high IF journals has significantly increased (321 articles) in comparison with the previous year (280 articles). Mostly, there were articles in high rated journals (Q1 and Q2).

For the first time, scientists from the Department of Physical and Power Plants, associate professor Artem Naymushin and associate professor Yuri Chertkov, have published their article in a highly rated journal.

Journal: Annals of Nuclear Energy (IF 1,174)

Article:   Control rod calibration simulation using Monte Carlo code for the IRT-type research reactor

“Sustainable Energy”

Valery Lujbotiskii, a professor at the Department of Higher Mathematics and Mathematical Physics, Giudice  G.F. (h-index: 59), Mohapatra  R.N. (h-index: 73), Shrock  R. (h-index: 48) etc.

Journal: Reports on Progress in Physics (IF 12,933).

Article: A facility to search for hidden particles at the CERN SPS: the SHiP physics case

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (search for hidden particles) experiment is intended to hunt for new physics in the largely unexplored domain of very weakly interacting particles with masses below the Fermi scale, inaccessible to the LHC experiments, and to study tau neutrino physics. The same proton beam setup can be used later to look for decays of tau-leptons with lepton flavour number non-conservation, $tau to 3mu $  and to search for weakly-interacting sub-GeV dark matter candidates. We discuss the evidence for physics beyond the standard model and describe interactions between new particles and four different portals—scalars, vectors, fermions or axion-like particles. We discuss motivations for different models, manifesting themselves via these interactions, and how they can be probed with the SHiP experiment and present several case studies. The prospects to search for relatively light SUSY and composite particles at SHiP are also discussed. We demonstrate that the SHiP experiment has a unique potential to discover new physics and can directly probe a number of solutions of beyond the standard model puzzles, such as neutrino masses, baryon asymmetry of the Universe, dark matter, and inflation.

 

Sigurd Bauercker, JRF at the Department of General Physics, Jungwirth P. (h-index: 52) et all.

Journal: Angewandte Chemie — International Edition (IF 11,709).

Article: A Non-Exploding Alkali Metal Drop on Water: From Blue Solvated Electrons to Bursting Molten Hydroxide

Alkali metals in water are always at the brink of explosion. Herein, we show that this vigorous reaction can be kept in a non-exploding regime, revealing a fascinating richness of hitherto unexplored chemical processes. A combination of high-speed camera imaging and visible/near-infrared/infrared spectroscopy allowed us to catch and characterize the system at each stage of the reaction. After gently placing a drop of a sodium/potassium alloy on water under an inert atmosphere, the production of solvated electrons became so strong that their characteristic blue color could be observed with the naked eye. The exoergic reaction leading to the formation of hydrogen and hydroxide eventually heated the alkali metal drop such that it became glowing red, and part of the metal evaporated. As a result of the reaction, a perfectly transparent drop consisting of molten hydroxide was temporarily stabilized on water through the Leidenfrost effect, bursting spectacularly after it had cooled sufficiently.

 

Ivlev S. I. (h-index: 3), Karttunen A. J. (h-index: 19), Roman Ostvald, associate professor at the Department of Rare, Scattered and Radioactive Elements Technology ((№43), Kraus F. (h-index: 15).

Journal: Chemical Communications (IF 6,567).

Article: Br2F7− and Br3F10−: peculiar anions showing μ2- and μ3-bridging F-atoms

RbCl and CsCl react with BrF3 yielding the corresponding decafluoridotribromates(III), MBr3F10 (M = Rb, Cs), which were structurally characterized for the first time. The Br3F10− anion is surprisingly not linear but contains a μ3-bridging fluorine atom and seems to be the first example of μ3-F bridging of Br atoms. The compounds are highly reactive and cannot be handled in glassware. As for the tetrafluoridobromates themselves, they are powerful oxidizers and thus suitable for the dry-chemical recycling of precious metals and additionally feature a significantly higher BrF3 content.

 

Anton Galazhinsky, a professor at the Department of Higher Mathematics and Mathematical Physics,  Lechtenfeld O. (h-index: 28).

Journal: Journal of High Energy Physics (IF 6,023).

Article: Superconformal SU(1, 1|n) mechanics

Recent years have seen an upsurge of interest in dynamical realizations of the superconformal group SU(1, 1|2) in mechanics. Remarking that SU(1, 1|2) is a particular member of a chain of supergroups SU(1, 1|n) parametrized by an integer n, here we begin a systematic study of SU(1, 1|n) multi-particle mechanics. A representation of the superconformal algebra su(1, 1|n) is constructed on the phase space spanned by m copies of the (1, 2n, 2n−1) supermultiplet. We show that the dynamics is governed by two prepotentials V and F, and the Witten-Dijkgraaf-Verlinde-Verlinde equation for F shows up as a consequence of a more general fourth-order equation. All solutions to the latter in terms of root systems reveal decoupled models only. An extension of the dynamical content of the (1, 2n, 2n−1) supermultiplet by angular variables in a way similar to the SU(1, 1|2) case is problematic.

 

Bukhbinder I.L. (h-index: 30), Ivanov E.A. (h-index: 27), Boris Merzlikin, a senior lecturer at the Department of Higher Mathematics and Mathematical Physics, et al.

Journal: Physics Letters B (IF 4,787).

Article: One-loop divergences in the 6D  , N=(1,0)N=(1,0) abelian gauge theory

We consider, in the harmonic superspace approach, the six-dimensional N=(1,0)N=(1,0) supersymmetric model of abelian gauge multiplet coupled to a hypermultiplet. The superficial degree of divergence is evaluated and the structure of possible one-loop divergences is analyzed. Using the superfield proper-time and background-field technique, we compute the divergent part of the one-loop effective action depending on both the gauge multiplet and the hypermultiplet. The corresponding counterterms contain the purely gauge multiplet contribution together with the mixed contributions of the gauge multiplet and hypermultiplet. We show that the theory is on-shell one-loop finite in the gauge multiplet sector in agreement with the results of [1]. The divergences in the mixed sector cannot be eliminated by any field redefinition, implying the theory to be UV divergent at one loop.

 

Anton Zverev, an assistant at the Department of Welding, the Yurga Institute of Technology (TPU’s branch) Kuklya M. M. (h-index: 29) et al.

Journal: Journal of Physical Chemistry C (IF 4,509).

Article: Role of Hydrogen Abstraction Reaction in Photocatalytic Decomposition of High Energy Density Materials

Explosive phenomena includes a stunningly wide range of diverse manifestations, such as supernova remnant shocks and solar flares, violent decomposition chemistry and synthesis of superior materials under extreme conditions, weapons, missiles, and high velocity impact damage, fuels for space rocket engines, festive fireworks, and applications of detonation waves in construction industry and microshocks in medicine. With the earliest stages of explosives chemistry in energetic materials remaining poorly understood and constantly posing new science questions, an achievement of a controllable initiation of detonation process represents a particular challenge. Precise tuning of sensitivity to initiation of detonation via photoexcitation appears unreachable because all known secondary explosives are wide band gap insulators. This research demonstrates how YAG:Nd laser irradiation triggers explosive decomposition of PQ–PETN composites formed by pentaerythritol tetranitrate (PETN), high energy density material, mixed with photosensitive 9,10-phenanthrenequinone (PQ). We suggest, explore, and validate a feasible mechanism of photocatalytic decomposition of explosives activated by the laser excitation with the energy of 1.17–2.3 eV and the wavelength of 1064–532 nm.

 

Tatiana Spiridonova, a graduate students at the Department of General Physics, Schmauder S. (h-index: 27) et al.

Journal: International Journal of Hydrogen Energy (IF 3,205).

Article: Hydrogen diffusion in doped and undoped α-Ti: An ab-initio investigation

The hydrogen diffusion paths in undoped and doped α-Ti were studied by the projector augmented wave method within the density functional theory. Our calculations confirm that in the basal plane, the indirect mechanism of hydrogen diffusion between octahedral sites through a tetrahedral interstitial is more preferable than the direct path. The lowest energy barrier of 0.1 eV was found between the tetrahedral sites along the c axis; however, a hydrogen atom can only oscillate between them. The influence of substitutional impurities (transition- and simple-metal ones) on the main barriers is discussed. It was found that impurities of simple metals hamper the H mobility by increasing the activation energy, whereas most transition-metal solutes (3d-metals of group 5–10) reduce the energy barriers. In general, a deeper understanding of the H diffusion behavior in doped α-Ti is achieved. The temperature-dependent diffusion coefficient and the activation energy for hydrogen atom hopping along the preferential path in pure titanium are found to be in agreement with the experimental data.

 

“Medical Engineering”

Oeltgen P. (h-index: 26), Yuri Lishmanov,  a leading research engineer at the Nuclear Reactor Laboratory №31, Downey M. (h-index: 79) et al.

Journal: Medicinal Research Reviews (IF 9,135)

ArticleProspects for Creation of Cardioprotective and Antiarrhythmic Drugs Based on Opioid Receptor Agonists

It has now been demonstrated that the μ, δ1, δ2, and κ1 opioid receptor (OR) agonists represent the most promising group of opioids for the creation of drugs enhancing cardiac tolerance to the detrimental effects of ischemia/reperfusion (I/R). Opioids are able to prevent necrosis and apoptosis of cardiomyocytes during I/R and improve cardiac contractility in the reperfusion period. The OR agonists exert an infarct-reducing effect with prophylactic administration and prevent reperfusion-induced cardiomyocyte death when ischemic injury of heart has already occurred; that is, opioids can mimic preconditioning and postconditioning phenomena. Furthermore, opioids are also effective in preventing ischemia-induced arrhythmias.

 

Andrey Khlebnikov, a professor at the Department of Biotechnology and Organic Chemistry, Quinn M. T. (h-index: 63) et al.

Journal: Journal of Enzyme Inhibition and Medicinal Chemistry (IF 3,428).

Article:  Cinnoline derivatives as human neutrophil elastase inhibitors

Compounds that can effectively inhibit the proteolytic activity of human neutrophil elastase (HNE) represent promising therapeutics for treatment of inflammatory diseases. We present here the synthesis, structure–activity relationship analysis, and biological evaluation of a new series of HNE inhibitors with a cinnoline scaffold. These compounds exhibited HNE inhibitory activity but had lower potency compared to N-benzoylindazoles previously reported by us. On the other hand, they exhibited increased stability in aqueous solution. The most potent compound, 18a, had a good balance between HNE inhibitory activity (IC50 value = 56 nM) and chemical stability (t1/2 = 114 min). Analysis of reaction kinetics revealed that these cinnoline derivatives were reversible competitive inhibitors of HNE. Furthermore, molecular docking studies of the active products into the HNE binding site revealed two types of HNE inhibitors: molecules with cinnolin-4(1H)-one scaffold, which were attacked by the HNE Ser195 hydroxyl group at the amido moiety, and cinnoline derivatives containing an ester function at C-4, which is the point of attack of Ser195.

 

“The Planet Resources”

Ekaterina Kolobova, a design engineer at the Department of Organic Substances and Polymers Technology, Bogdanchikova N. E. (h-index: 29), Zubavichus Y. V. (h-index: 24), Zanella R. A. (h-index: 23), Alexei Pestryakov, head of the Department of Physical and Analytical Chemistry.

Journal: Catalysis Today (IF 4,312).

Article: Au/TiO2 catalysts promoted with Fe and Mg for n-octanol oxidation under mild conditions

This work aims to further the understanding of gold-based catalytic oxidation of n-octanol in liquid phase. Modification of catalysts with metal oxides additives (Fe or Mg) was used as a tool for transforming and stabilizing gold species. Structural, electronic and catalytic properties of gold catalysts were systematically investigated by means of DRS, H2, CO FTIR, SBET, EDS and SEM, HRTEM, SR-XRD, XANES, XPS and liquid phase n-octanol oxidation. Addition of modifiers affects Au electronic properties, but not the structural ones. Characterization results allow excluding Au3+ ions as candidates for active sites in n-octanol oxidation. In Au/Mg/TiO2, gold exhibited more reduced states while in Au/Fe/TiO2 gold was more oxidized; Au/TiO2 for intermediate oxidized states was found. The proper balance of oxidation states in the gold surface of Au/Mg/TiO2 can be responsible for its higher activity compared with Au/Fe/TiO2 and Au/TiO2 towards n-octanol oxidation. Finally our approach shed light on the nature of active sites for n-octanol oxidation on gold and furthers the development of green base-free catalytic oxidation of alcohols.

Spencer R. G. (h-index: 29), Gustafsson O. (h-index: 52), Igor Semiletov,  a professor at the Department of Geology and Minerals, Oleg Dudarev, a research fellow at the Arctic Sea’s Carbon Laboratory, Wagner D. W. (h-index: 24), van Dongen B. E. (h-index: 25), Talbot H. M. (h-index: 27) et al.

Journal: Biogeosciences (IF 3,7).

Article: Source, transport and fate of soil organic matter inferred from microbial biomarker lipids on the East Siberian Arctic Shelf

The Siberian Arctic contains a globally significant pool of organic carbon (OC) vulnerable to enhanced warming and subsequent release by both fluvial and coastal erosion processes. However, the rate of release, its behaviour in the Arctic Ocean and vulnerability to remineralisation is poorly understood. Here we combine new measurements of microbial biohopanoids including adenosylhopane, a lipid associated with soil microbial communities, with published glycerol dialkyl glycerol tetraethers (GDGTs) and bulk δ13C measurements to improve knowledge of the fate of OC transported to the East Siberian Arctic Shelf (ESAS). The microbial hopanoid-based soil OC proxy R′soil ranges from 0.0 to 0.8 across the ESAS, with highest values nearshore and decreases offshore. Across the shelf R′soil displays a negative linear correlation with bulk δ13C measurements (r2 = −0.73, p =  < 0.001). When compared to the GDGT-based OC proxy, the branched and isoprenoid tetraether (BIT) index, a decoupled (non-linear) behaviour on the shelf was observed, particularly in the Buor-Khaya Bay, where the R′soil shows limited variation, whereas the BIT index shows a rapid decline moving away from the Lena River outflow channels. This reflects a balance between delivery and removal of OC from different sources. The good correlation between the hopanoid and bulk terrestrial signal suggests a broad range of hopanoid sources, both fluvial and via coastal erosion, whilst GDGTs appear to be primarily sourced via fluvial transport. Analysis of ice complex deposits (ICDs) revealed an average R′soil of 0.5 for the Lena Delta, equivalent to that of the Buor-Khaya Bay sediments, whilst ICDs from further east showed higher values (0.6–0.85). Although R′soil correlates more closely with bulk OC than the BIT, our understanding of the endmembers of this system is clearly still incomplete, with variations between the different East Siberian Arctic regions potentially reflecting differences in environmental conditions (e.g. temperature, pH), but other physiological controls on microbial bacteriohopanepolyol (BHP) production under psychrophilic conditions are as yet unknown.

 

Andrey Zagoruiko, a professor at the Department of Fuel Chemical Technology and Chemical Cybernetics, et al.

Journal: Catalysis Communications (IF 3,389).

ArticleIron oxide catalyst at the modified glass fiber support for selective oxidation of H2S

The novel iron-oxide based glass-fiber catalysts (GFC) for the H2S selective oxidation uses the support in form of the glass microfibrous fabric, premodified by external layer of secondary porous SiO2 support. The specific activity of FeOx-SiO2/GFC catalyst per unit mass of active component exceeds that of the similar conventional Fe2O3/Al2O3 catalyst by more than an order of magnitude due to the more dispersed state of active component in the GFC (1–2 nm compared to 15–30 nm in conventional catalyst). The proposed GFC also looks advantageous in terms of mass transfer efficiency and easy scale-up.

20 December 2016

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