The Cited Scientists: Golden Catalysts, Implants and Raman Spectroscopy

The project - Cited Scientists of Tomsk Polytechnic University summarized the publication activity of the university scientists in January. The most highly cited co-author of articles of the university scientists has the Hirsch index of 34, and the highest rated journal - Impact Factor 6,012.

Photo: Formation of tissue around the implant

 

Research School of Chemistry & Applied Biomedical Sciences (RSC&ABS)

Green Oxidation of n-octanol on Supported Nanogold Catalysts: Formation of Gold Active Sites under Combined Effect of Gold Content, Additive Nature and Redox Pretreatment

Magazine ChemCatChem (Q1, IF 4,674)

E. Pakrieva junior researcher of RSC&ABS; Dr. E. Kolobova senior researcher of RSC&ABS; Prof. A. Pestryakov RSC&ABS; Dr. G. Mamontov Tomsk State University; Dr. N. Bogdanchikova National Autonomous University of Mexico; Dr. M. H. Farias National Autonomous University of Mexico (HI 22); Dr. V. Cortés Corberán  (HI 22); Martinez Gonzalez S., Institute of Catalysis and Petroleum Сhemistry Spanish National Council of Scientific Research; Сarabineiro SA, (HI 34), University of Porto.

The international research team studied the combined influence of gold content (0.5 or 4 wt. %), modifying additives (La or Ce oxides) and redox pretreatments (H2 or O2) on catalytic properties and formation of active sites of Au/TiO2 in the selective oxidation of n-octanol under mild conditions. 

“Selective oxidation of these alcohols from biomass conversion products may allow to be used as a new resource for the production of corresponding aldehydes, ketones, esters and fatty acids, which are valuable intermediates for the chemical, pharmaceutical and agrochemical industries. For example, behenic acid (C22H44O2) is used in cosmetology, hair conditioners and creams because of its high wettability and lignoceric acid (C24H48O2) is used in pharmaceutical and as food additives. Octanol is the first representative of fatty alcohols and is a very convenient model for investigating the reactivity of this class of compounds and evaluating the properties of the catalysts for reactions dealing with them.”  - specified in the article

The present study was highly appreciated by ChemCatChem reviewers (top 5%), so the authors were asked to put this article on the cover of a release that will be ready soon (the article and cover are in the status of "correcting proof") - says the researchers.

Flexible intramedullary nails for limb lengthening: a comprehensive comparative study of three nails types

Magazine Biomedical Materials (Q2, IF 2.897)

Prof I. A. Khlusov RSC&ABS; E. N. Bolbasov junior researcher of Laboratory for Plasma Hybrid Systems (the Weinberg Research Center); K. S. Stankevich engineer of Laboratory for Plasma Hybrid Systems (the Weinberg Research Center); S. I. Tverdokhlebov assistant professor of the Weinberg Research Center; V. P. Ignatov head of laboratory (the Kizhner Research Center); N. A. Kononovich; D. A. Popkov (HI 11); E. N. Gorbach the Russian Ilizarov Scientific Center for Restorative Traumatology and Orthopaedics; Y. G. Anissimov (HI 21) First Moscow State Medical University, Griffith College; V. M. Bouznik (HI 12) All-Russian Scientific Research Institute of Aviation Materials.

This study aims to investigate the comparative study of calcium phosphate coatings for flexible intramedullary nails (FINs) used to lengthen long tubular bones. The presence of a calcium phosphate coating deposited by micro-arc oxidation (MAO) or a composite coating based on a co-polymer of vinylidene fluoride with tetrafluoroethylene (VDF-TeFE) and hydroxyapatite (HA) on the surface of the FIN significantly enhanced the regeneration of bone in the area of osteotomy during limb lengthening by combined osteosynthesis. The investigation of the physico-chemical properties of the FIN coated with calcium phosphate via MAO demonstrated that the improved bone tissue formation resulted from favourable conditions for adhesion, proliferation and differentiation of multipotent stem cells into osteoblasts on the coating surface. The composite coatings only stimulated the formation of bone tissue in vivo, primarily because of the piezoelectric properties of the VDF-TeFE co-polymer

Non-invasive monitoring of red beet development

Magazine SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (Q1, IF 2,88)

Prof E. Sheremet Research School of High-Energy Physics; Prof R. Rodriguez Research School of Chemistry & Applied Biomedical Sciences; D. Valiev associate professor of Division for Materials Science - School of Advanced Manufacturing Technologies; A. Ruban assistant School of Earth Sciences & Engineering; S. Turanov assistant of Division for Materials Science - School of Advanced Manufacturing Technologies; B. Ma Master student of School of Advanced Manufacturing Technologies; E. Bogatova Master student School of Advanced Manufacturing Technologies.

Agricultural monitoring is required to enhance crop production, control plant stress, and predict pests and crop infection. Apart from monitoring the external influences, the state of the plant itself must be tracked. However, the modern methods for plant analysis are expensive and require plants processing often in a destructive way. Optical spectroscopy can be used for the non-invasive monitoring requiring no consumables, and little to none sample preparation. In this context, we found that the red beet growth can be monitored by Raman spectroscopy. Our analysis shows that, as plants age, the rate of betalain content increases. This increase makes betalain dominate the whole Raman spectra over other plant components. The dominance of betalain facilitates its use as a molecular marker for plant growth. This finding has implications in the understanding of plant physiology, particularly important for greenhouse growth and the optimization of external conditions such as artificial illumination.

Research School of Advanced Manufacturing Technologies (SAMT)

The influence of intense ultrasound applied during pressing on the optical and cathodoluminescent properties of conventionally sintered YSZ ceramics

Magazine Ultrasonics Sonochemistry (Q1, IF 6,012)

Prof O.L. Khasanova Division for Materials Science - School of Advanced Manufacturing Technologies (SAMT), director of Innovation Center for Nanomaterials and Nanotechnologies of TPU; E.S. Dvilisa senior researcher of Innovation Center for Nanomaterials and Nanotechnologies, School of Advanced Manufacturing Technologies; E.F. Polisadova assistant professor of Division for Materials – SAMT; S.A. Stepanov assistant professor of Division for Materials – SAMT; D.T. Valiev assistant professor of Division for Materials – SAMT; D.V. Dudina (HI 15) Lavrentyev Institute of Hydrodynamics. 

The research project was conducted within the framework of the project under grant No. 17-13-01233 of the Russian Science Foundation and is related to the creation of new efficient light sources in the visible and infrared ranges.

It was shown that when the ultrasonic treatment is applied, the optical absorption cutoff wavelength of the sintered material is shifted to longer wavelengths, while the optical density of the material increases over the whole measurement spectrum. Samples subjected to ultrasonic treatment during pressing show higher intensity of luminescence than those obtained without the use of ultrasound, the shape of the luminescence spectra remaining unchanged. A correlation was obtained between the integral intensity of cathodoluminescence and the vacancy concentration in the sintered YSZ.

Evaluating damage of reinforced concrete structures subjected to bending using the parameters of electric response to mechanical impact

Magazine Composites Part B: Engineering (Q1, IF 4.92)

M. Petrov junior researcher, Research Laboratory of Electronics, Dielectrics and Semiconductors; D.D. Dann researcher of Research Laboratory of Electronics, Dielectrics and Semiconductors; T.V. Fursa Tomsk Polytechnic University; Yu.A. Reutov Institute of Strength Physics and Materials Science Siberian Branch Russian Academy of Science.

The paper considers a method for evaluation of reinforced concrete damage due to the bending of concrete beams reinforced with steel and fiberglass reinforcement. The evaluation procedure is based on measuring the electrical response to mechanical impact. Measurements of the electrical response are carried out periodically during a gradual increase in the external load. The analysis of signals in time and frequency is the basis for the algorithm for evaluating the damage processes in reinforced concrete structures subjected to four-point bending. On the basis of numerical simulation and experimental study of the load graphs, the stages of damage process in reinforced concrete beams under bending action were determined. A good correspondence between experimental and theoretical results is shown. As diagnostic parameters characterizing the stages of damage in reinforced concrete beams, it is proposed to use the energy decay coefficient of the electrical responses, the coefficient of cross-correlation of the signal spectrum in the process of loading with the signal spectrum from the same sample before loading, and the frequency shift at which the maximum coefficient of correlation can be observed. Most informative frequency ranges where the proposed diagnostic parameters relation to the degradation processes of reinforced concrete during bending is more reliable were determined. The proposed method can be used to monitor the development of damage in reinforced concrete under bending conditions.

Research School of High-Energy Physics (SHEP)

Advantages of switching coal-burning power plants to coal-water slurries containing petrochemicals

Magazine Applied Thermal Engineering (Q1, IF 3,771)

Prof P. Strizhak Research School of High-Energy Physics; M. Kurgankina Research School of High-Energy Physics; G. Nyashina Research School of High-Energy Physics.

Enterprises from chemical, oil-processing, transport, energy, and other industries are struggling to reduce their negative environmental impact without sacrificing the profit. The main negative impact comes from the anthropogenic emissions (NOx, SOx, CO2, and fly ash) from the combustion of coal, oil products, and other fuels. Coal is regarded as the most environmentally hazardous one. An advanced solution to the environmental problems of coal-burning enterprises is switching from coal to fuel slurries containing water and waste flammable liquids. These are known as coal-water slurries (CWS) or coal-water slurries containing petrochemicals (CWSP). In this research, we analyze all the main strengths and weaknesses of high-potential CWS and CWSP fuels as compared to coal. For the evaluation we use such indicators as heat of combustion and fuel consumption; anthropogenic emissions and ash residue; maximum combustion temperature; minimum ignition temperatures; ignition delay times; cost of components; feasibility indicators of storage, transportation, and combustion of fuels; fire and explosion safety. We also introduce a complex parameter to consider the contribution of all the above indicators. The research findings are consolidated with due consideration of high-potential components for CWSP fuels, their properties and concentrations.