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Journal articles on the topic 'Inhomogeneities in protective compositions'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Kupriyanov, Kirill S., and Vladimir V. Pereverzentsev. "Analytical model for determining the leakage albedo component for a direct cylindrical channel passing through the nuclear reactor protective layer." Nuclear Energy and Technology 7, no. (2) (2021): 91–95. https://doi.org/10.3897/nucet.7.68941.

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The task of determining the radiation situation, including neutron and gamma-quantum flux density, radiation spectrum, specific volumetric activity of radioactive gases in the air, etc. behind the protective composition having inhomogeneities, has always been important in matters of radiation safety. One of the ways to solve the problem of determining gamma radiation fluxes was to divide the total ionizing radiation flux into four components: line-of-sight (LOS), leakage, line-of-sight albedo, and leakage albedo, and obtain an analytical solution for each component. The first three components

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2

Kupriyanov, Kirill S., and Vladimir V. Pereverzentsev. "Analytical model for determining the leakage albedo component for a direct cylindrical channel passing through the nuclear reactor protective layer." Nuclear Energy and Technology 7, no. 2 (2021): 91–95. http://dx.doi.org/10.3897/nucet.7.68941.

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The task of determining the radiation situation, including neutron and gamma-quantum flux density, radiation spectrum, specific volumetric activity of radioactive gases in the air, etc. behind the protective composition having inhomogeneities, has always been important in matters of radiation safety. One of the ways to solve the problem of determining gamma radiation fluxes was to divide the total ionizing radiation flux into four components: line-of-sight (LOS), leakage, line-of-sight albedo, and leakage albedo, and obtain an analytical solution for each component. The first three components

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3

Vlasova, O. V., V. S. Denisova, A. V. Zakalashniy, and O. V. Kulikova. "PROTECTIVE TECHNOLOGICAL COATING BASED ON ZrO2–BaO–B2O3–SiO2 SYSTEM FOR PROTECTION OF HEAT-RESISTANT NICKEL ALLOY WITH SINGLE-CRYSTAL STRUCTURE DURING HEAT TREATMENT." Steklo i Keramika, no. 9 (September 2022): 44–54. http://dx.doi.org/10.14489/glc.2022.09.pp.044-054.

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The purpose of this work was developing of protective technological coating for protection of heat-resistant nickel alloy with single-crystal structure ZHS30 during high-temperature homogenization. Based on characteristics of the alloy the synthesis of coatings was carried out in following directions: modification of known coatings in the system CaO–BaO–SiO2 by introducting refractory filler and organosilicon materials, research of two-layer coatings and synthesis of refractory frits in various silicate systems. The best properties of alloy ZHS30 are obtained using a coating based on a synthes

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4

Astapov, Alexey, Lev Rabinskiy, and Olga Tushavina. "Oxidation Resistance of a Si–TiSi2–MoSi2–TiB2–CaSi2 Coating on a Cf/C–SiC Substrate in High-Speed High-Enthalpy Air Plasma Flows." Nanomaterials 11, no. 10 (2021): 2637. http://dx.doi.org/10.3390/nano11102637.

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The results of a study on the development and testing of a heat-resistant coating in a Si–TiSi2–MoSi2–TiB2–CaSi2 system to protect Cf/C–SiC composites from oxidation and erosional entrainment in high-speed flows are presented here. The coating was formed using firing fusion technology on the powder composition. Oxidation resistance tests were carried out under static conditions in air at 1650 °C and under conditions of interaction with high-speed air plasma flows, with Mach numbers M = 5.5–6.0 and enthalpy 40–50 MJ/kg. The effectiveness of the protective action of the coating was confirmed at

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Burdeina, Nataliia, Larysa Levchenko, Iryna Korduba, et al. "Applying heterogeneous building materials for the protection of people against electromagnetic radiation." Eastern-European Journal of Enterprise Technologies 5, no. 10 (131) (2024): 45–52. http://dx.doi.org/10.15587/1729-4061.2024.313629.

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The object of this study is the processes of shielding electromagnetic radiation by building and facing materials. The research is aimed at solving the problem of ensuring the electromagnetic safety of people by improving the composition and structures of building and facing materials. Means for improving the electromagnetic safety of people under industrial and domestic conditions using non-homogeneous building materials have been determined. The shielding properties of reinforced concrete structures were studied. A methodology for increasing their efficiency depending on the amplitude-freque

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6

Kablov, V. F., I. N. Khlobzheva, N. A. Keybal, O. A. Strelkova, and E. I. Sedova. "WATER-SOLUBLE POLYMER COMPOSITIONS FOR FIRE PROTECTIVE COMPOSITIONS." Izvestia Volgograd State Technical University, no. 5 (2023): 101–8. http://dx.doi.org/10.35211/1990-5297-2023-5-276-101-108.

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7

Wang, Di, Sheng Li, Guowei Deng, Yang Liu, and Moataz M. Attallah. "A Melt Pool Temperature Model in Laser Powder Bed Fabricated CM247LC Ni Superalloy to Rationalize Crack Formation and Microstructural Inhomogeneities." Metallurgical and Materials Transactions A 52, no. 12 (2021): 5221–34. http://dx.doi.org/10.1007/s11661-021-06457-5.

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AbstractThis study of the laser powder bed fusion (LPBF) of γ′-strengthened Ni superalloy CM247LC focuses on the development of a melt pool temperature model to predict crack density within the alloy. This study also analyzes spatter and elemental evaporation, which might cause defects and inhomogeneities, at different melt pool temperatures. The melt pool temperature model provides more accurate predictions than the widely used energy density model. Spatter particles were collected and characterized to study their sizes and chemical compositions, compared with the virgin powder, recycled powd

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8

Kur`yato, Nikolay, Viktoriya Bryksina, Liudmila Rodionova, and Larisa Knyazeva. "PROTECTIVE EFFECTIVENESS OF OIL COMPOSITIONS WITH PARAFFIN WAX." SCIENCE IN THE CENTRAL RUSSIA, no. 6 (December 26, 2022): 120–28. http://dx.doi.org/10.35887/2305-2538-2022-6-120-128.

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The effectiveness of compositions based on fresh M10G2k and used motor oil (MMO) with the addition of paraffin 1-10 wt. % for the protection of carbon steel was investigated in this work. Preservative compositions were prepared by dissolving paraffin in oils with heating. The protective coating on the metal was formed during the day. Kinematic viscosity was measured by the Brookfield method on a rotational viscometer. Studies have shown that paraffin has a thickening effect. Empirical equations were obtained, which are a special case of the Reynolds-Filonov equation, describing the viscosity-t

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9

Sokolova, Victoria Alexandrovna, Viktor A. Markov, and Andrey Arkadyevich Rzhavtsev. "Improvement of Technology of Formation of Coatings with Metal Effect by Modified Water-Dispersion Paints." Key Engineering Materials 822 (September 2019): 745–51. http://dx.doi.org/10.4028/www.scientific.net/kem.822.745.

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The work is devoted to the study of the formation of protective and decorative coatings environmentally safe combined paint compositions. The considered work covers a range of issues related to colloidal-chemical modification of organo-soluble and water-dispersion lacquer compositions, development of their rational formulations and finishing modes, study of physical, mechanical and operational properties of protective coatings and ends with the calculation of the possible economic efficiency of the research results. In work environmentally safe water-dispersive paint and varnish compositions f

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10

Lyachin, V. S., P. N. Petuhov, and A. G. Saybel. "The technique of selecting a guard band in the climatic tests of radio-electronic equipment." Metrologiya, no. 4 (December 15, 2021): 4–16. http://dx.doi.org/10.32446/0132-4713.2021-4-4-16.

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The purpose of this study is to create a methodology for assessing the risks arising from climatic tests of radio-electronic equipment. The article considers the effect of additional misalignment of transmission lines arising under conditions of temperature inhomogeneities on the increase in consumer and producer risks. A method of selecting a protective measuring band is proposed to minimize the probability of false acceptance and rejection of the tested devices. The results obtained make it possible to determine the optimal, from the point of view of the risks of the consumer and the manufac

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11

Akopyan, V. B., M. V. Bambura, V. A. Filatova, and A. V. Afonin. "Protective antimicrobial coverings containing amber and propolis." Izvestiya MGTU MAMI 6, no. 2-4 (2012): 262–69. http://dx.doi.org/10.17816/2074-0530-68461.

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Compositions in the form of pencils and varnishes containing amber and propolis may be used for creation of protective films to prevent the growth and development of the fungusesAspergillusniger and Penicillumculmorum,bacterias Bacillus subtilis, Bacillus turengensis, and other commonly encountered on many surfaces in residential and industrial areas, in bio-filters, in hermetic premises, including space stations. Pencils are compact, hygienic and easy to use, but the protective properties of varnishes are more pronounced. Fast preparation of compositions containing natural resinous substances

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12

Anan’ev, A., and L. Maksimov. "Spatial Distribution of Heavy Metal Ions in Glass Forming Melts: Spectroscopic and Physical-Chemical Study." Advanced Materials Research 39-40 (April 2008): 41–44. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.41.

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Spatial distribution of heavy metal ions (HMI) in inorganic glass forming melts was studied by measuring HMI distribution coefficient between two unmixable melts: sodium-borate glass forming melt and non-glass forming molten sodium sulfate. Combining the data on glass host composition dependence of HMI distribution coefficient with the data of Rayleigh and Mandel’shtam-Brillouin scattering (RMBS) spectroscopy of glasses doped with HMI and undoped ones made it possible to evidence the segregation of HMI into alkali-enriched inhomogeneities of glass hosts and offer the approach to choosing compo

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13

Paron'kina, E. A., G. B. Shirokova, A. Ya Furman, and N. O. Muryzeva. "Principles of development of water-displacing protective compositions." Chemistry and Technology of Fuels and Oils 26, no. 7 (1990): 339–41. http://dx.doi.org/10.1007/bf00725761.

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14

Al Mamouri, Saad, L. H. Zagorodnyuk, D. Sumskoy, A. Bocharnikov, and O. Shemetova. "BINDING COMPOSITIONS USING VERMICULITE FOR HEAT PROTECTIVE SOLUTIONS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 8, no. 2 (2022): 8–19. http://dx.doi.org/10.34031/2071-7318-2022-8-2-8-19.

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The study of cement mortars containing expanded vermiculite as a filler is presented. The use of vermiculite up to 30% or more leads to good thermal insulation properties of solution, but low compressive strength. Features of the nature of expanded vermiculite contribute to reducing the density and providing heat-shielding properties. Mechanical activation of binder compositions depending on the duration of treatment in a vibrating mill compositions: Portland cement 90-70%, vermiculite 10-30%, allow to obtain a density in the range of 1720-1933 kg/m3, with a strength of 42.8-58.2 MPa, while sa

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15

Dergunova, Elena S., German S. Dedyaev, and Margarita A. Goncharova. "Effective Polymer Protective Coatings." Defect and Diffusion Forum 410 (August 17, 2021): 542–47. http://dx.doi.org/10.4028/www.scientific.net/ddf.410.542.

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New protective coating compositions based on epoxy resins with high rates of chemical resistance to etching solutions are developed. The chemical resistance coefficient ranges from 0.7 to 0.96. The curing process was evaluated via IR spectroscopy. For each composition, the following parameters were determined: impact strength A, compressive strength σcompr and bending strength σbend, adhesion shear strength σshear, glass transition temperature Tgt, high elasticity modulus Eh and mesh density nm.

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16

Keibal, N. A., V. F. Kablov, V. V. Pudovkin, and V. S. Sakhnova. "INVESTIGATION OF PROPERTIES OF EPOXY COMPOSITES CONTAINING SHUNGITE." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 12(247) (December 24, 2020): 102–6. http://dx.doi.org/10.35211/1990-5297-2020-12-247-102-106.

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The paper presents the results of a study of epoxy compositions containing MK-2 shungite as a filler. It is shown that shungite increases the resistance to thermal-oxidative degradation, as well as the heat-protective properties of epoxy compositions. In addition, epoxy compositions containing shungite are characterized by increased adhesion properties to the metal.

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17

Kur`yato, Nikolay, Larisa Knyazeva, Viktoriya Kur`yato, and Andrey Dorokhov. "PROTECTION OF CARBON STEEL WITH A PRESERVATION COMPOSITION WITH THE ADDITIVE OF PARAFFIN." SCIENCE IN THE CENTRAL RUSSIA, no. 1 (February 28, 2025): 98–105. https://doi.org/10.35887/2305-2538-2025-1-98-105.

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In order to extend the service life of agricultural equipment, it is necessary to use anticorrosive protection. For this purpose, the protective ability of oil compositions with the addition of paraffin in relation to carbon steel was studied. The compositions were obtained on the basis of motor (M10G2k) waste oil. The physicochemical properties of the oil compositions were also studied. All the studied oil coatings provide a fairly close adhesion resistance to the metal surface, respectively, close strength and durability, therefore the values of protective efficiency (Z) provided by them wil

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18

Humenetskyi, T. V., L. M. Bilyi, N. V. Chopyk та A. I. Boshchuk. "Аnti-corrosion coatings based on modified epoxy compositions". Chemistry, Technology and Application of Substances 6, № 1 (2023): 144–47. http://dx.doi.org/10.23939/ctas2023.01.144.

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The influence of surface-modified titanium dioxide on the electrochemical features of epoxy compositions was researched. The raise of epoxy primer protective properties by the presence of surface-modified fillers in its composition was determined. It is shown that the mechanism of the modified filler protective effect in epoxy coating applied on the steel is similar to the effect of solid zinc phosphate which effectiveness corresponds to the level of the known inhibitory pigment.

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19

Welbanks, Luis, and Nikku Madhusudhan. "On Atmospheric Retrievals of Exoplanets with Inhomogeneous Terminators." Astrophysical Journal 933, no. 1 (2022): 79. http://dx.doi.org/10.3847/1538-4357/ac6df1.

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Abstract The complexity of atmospheric retrieval models is largely data-driven, and one-dimensional models have generally been considered adequate with current data quality. However, recent studies have suggested that using 1D models in retrievals can result in anomalously cool terminator temperatures and biased abundance estimates even with existing transmission spectra of hot Jupiters. Motivated by these claims and upcoming high-quality transmission spectra, we systematically explore the limitations of 1D models using synthetic and current observations. We use 1D models of varying complexity

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20

Yakymechko, Yaroslav, and Vladyslav Voloshynets. "Expansive cements for the manufacture of the concrete protective bandages." Selected Scientific Papers - Journal of Civil Engineering 12, no. 2 (2017): 147–54. http://dx.doi.org/10.1515/sspjce-2017-0031.

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Abstract One of the promising directions of the use of expansive cements is making the protective bandages for the maintenance of pipelines. Bandages expansive application of the compositions of the pipeline reinforce the damaged area and reduce stress due to compressive stress in the cylindrical area. Such requirements are best suited for expansive compositions obtained from portland cement and modified quicklime. The article presents the results of expansive cements based on quick lime in order to implement protective bandages pipelines.

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21

Karsakova, O. A., and M. V. Kuzmin. "Synthesis and research of photocurable protective coatings on the basis of olygoesteracrylates." Chimica Techno Acta 7, no. 4 (2020): 229–32. http://dx.doi.org/10.15826/chimtech.2020.7.4.16.

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In this work, photocurable protective coatings based on methacrylic acid esters have been developed and their physical and mechanical properties have been investigated. The photocurable compositions were obtained by mixing at different ratios the following methacrylic acid esters: polyethylene glycol dimethacrylate 400 and triethylene glycol dimethacrylate ether, polyethylene glycol dimethacrylate 400 and oligourethane dimethacrylate, polyethylene glycol dimethacrylate 400 and pentaerythritol tetraacrylate. For the obtained compositions, the viscosity was studied using a Brookfield rotary visc

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22

Magadova, L. A., K. A. Poteshkina, V. D. Vlasova, M. S. Pilipenko, and V. Y. Fineshina. "Investigation of Carbon Dioxide Corrosion Inhibitors for Steel for Use in Oil and Gas Production." Oil and Gas Technologies 129, no. 4 (2020): 14–18. http://dx.doi.org/10.32935/1815-2600-2020-129-4-14-18.

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The effect of carbon dioxide corrosion on the pipeline transport system and its protection methods are considered in this article. The corrosion inhibitors represented by imidazoline-based compositions and industrial samples of corrosion inhibitors are used as protective reagents, and the model of produced water saturated with carbon dioxide is used as an aggressive environment. The protective properties of inhibitors and the corrosion rate were evaluated by gravimetric analysis. The paper presents the results of the study of industrial samples and inhibitory compositions developed on the basi

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23

Kur`yato, Nikolay, Larisa Knyazeva, Andrey Dorokhov, and Viktoriya Bryksina. "ANTI-CORROSION PROTECTION OF COPPER WITH OILS COMPOSITIONS CONTAINING ADDITIVE M-531." SCIENCE IN THE CENTRAL RUSSIA, no. 2 (April 27, 2024): 86–97. http://dx.doi.org/10.35887/2305-2538-2024-2-86-97.

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The use of anti-corrosion protection is necessary to maintain the performance of agricultural machinery and equipment. The effectiveness of oil compositions with the addition of M-531 in relation to copper was studied. The compositions were obtained on the basis of industrial and motor M10G2k (both fresh and used) oils. Their protective ability was studied using gravimetric and electrochemical methods (polarization and impedance) studies. According to the data obtained from corrosion gravimetric tests in 0.5 M NaCl, it was noted that compositions based on M10G2k oil turned out to be the most e

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24

Hasanov, Kh I., and N. N. Khalilov. "DEVELOPMENT AND STUDY OF INHIBITOR TO PREVENT INORGANIC SALTS DEPOSITION." Chemical Problems 20, no. 2 (2022): 175–82. http://dx.doi.org/10.32737/2221-8688-2022-2-175-182.

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The paper deals with potential compositions developed for inhibiting scale deposition on oil refining equipment and pipelines based on inhibited hydrochloric acid, dispersant EС 9660A, laprol 4202- 2B-30 and water. The density of the produced compositions at 20 ºС is 1020-1050 kg/m3 , the kinematic viscosity at 20 ºС is 30-40 mm2 /s, the pour point is minus 5-15 ºС, the hydrogen index pH = 2-3. The efficiency of scale inhibition was evaluated by means of common practice which relies on the ability of the chemical to retain calcium and magnesium cations in simulated artificial mineral water. It

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25

Mammadov, K. A., N. S. Gamidova, R. K. Gazieva, A. V. Akhmedova, G. B. Ibragimova, and T. S. Aliyev. "DEVELOPMENT AND APPLICATION OF NEW COMPOSITIONS TO IMPROVE THE EFFICIENCY OF OIL FIELD EQUIPMENT OPERATION." Petroleum Engineering 21, no. 3 (2023): 169–76. http://dx.doi.org/10.17122/ngdelo-2023-3-169-176.

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One of the urgent problems in the oil industry is the reliable protection of oil field equipment from corrosion. With this in mind, as a result of laboratory studies, three compositions were developed based on phospholipids, fatty acids, phosphoric acid, nitrogen compounds, asidol, naphthenic acids and light gas oil. The complexity of the composition gives the resulting compositions multifunctionality and allows them to be used in various aggressive conditions. In laboratory conditions, the effect of these compositions on the corrosion rate of metals and on the vital activity of sulfate

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26

Menshikov, Ivan A., and Anatoliy B. Shein. "PROTECTIVE PROPERTIES OF «SOLING» SERIES INHIBITORS IN ACIDIC MEDIA CONTAINING HYDROGEN SULPHIDE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 7 (2018): 91. http://dx.doi.org/10.6060/ivkkt.20186107.5703.

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The work presents the results of the study of a number of inhibitory compositions of the “Soling” series based on acetylenic alcohols and their mixtures with nitrogen-containing compounds of various types in a hydrochloric acid (0.1 M HCl) containing 100 ppm of hydrogen sulphide. Gravimetric tests and electrochemical studies were performed on mild steel St3 at ambient temperature. The exposure time of the samples was 24 h. Polarization curves were obtained in a three-electrode cell, using the SOLARTRON 1280 C electrochemical measuring complex. The following protective compositions were studied

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27

Kosichenko, Yu M., and O. A. Baev. "Modified Geomembrane Compositions for Hydraulic Structure Impervious Coatings." Solid State Phenomena 265 (September 2017): 548–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.548.

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The article reviews the results of studying modified geomembrane compositions for impervious surfaces, including polymeric geomembrane of fresh raw materials and geomembrane of recycled materials reinforced with protective “Dornit” type geotextile to prevent damage. The work suggests criteria of technical efficiency and reliability of geomembrane compositions, estimated correlations to define those indicators and presents theoretical approaches to assess the operational reliability of geomembrane compositions based on reliability theory methods.

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28

Komar, V. V., N. V. Kulinich, and N. P. Krutko. "Structure and protective properties of epoxy-polyester powder coatings containing curing accelerator." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 54, no. 4 (2019): 478–86. http://dx.doi.org/10.29235/1561-8331-2018-54-4-478-486.

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As a result of the study, the effect of curing accelerators (heterocyclic amine and zinc-containing accelerator) on the structure, physico-mechanical and protective properties of coatings based on powder epoxy-polyester compositions was established. The introduction of accelerators into the compositions affects the depth and speed of the curing process of film formers and provides the possibility to reduce the curing temperature. It has been established that the use of heterocyclic amine accelerator is more effective than a zinc-containing catalyst. For compositions containing heterocyclic ami

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29

Komar, V. V., T. A. Pochodina, N. V. Kulinich, N. P. Krut’k, and L. V. Ovseenko. "Modification of powder epoxy compositions with highly dispersed magnesium oxide." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 56, no. 2 (2020): 220–28. http://dx.doi.org/10.29235/1561-8331-2020-56-2-220-228.

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The process of forming epoxy powder compositions with the participation of highly dispersed magnesium oxide in the preparation of compositions by extrusion mixing of components in the melt is investigated. It is established that highly dispersed MgO particles participate in the polymerization process and act as additional crosslinking units of defective regions of the polymer network, which improves the functional properties of epoxy powder compositions. Coatings based on modified compositions are characterized by high physicomechanical properties at low temperature curing (130 °С) and can be

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30

Rakitskaya, Tatyana L., Tatyana A. Kiose, E. V. Kameneva, and V. Ya Volkova. "Natural Clinoptilolite Based Solid-State Compositions for Low-Temperature Air Purification from Sulphur Dioxide." Solid State Phenomena 230 (June 2015): 291–96. http://dx.doi.org/10.4028/www.scientific.net/ssp.230.291.

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Natural clinoptilolite (N-CLI) and N-CLI based solid-state compositions containing copper(II) chloride and halide ions (X- = Cl-, Br- or I-) were investigated by X‑ray diffraction phase analysis, IR spectroscopy, thermogravimetry, water vapour adsorption, and pH‑metry. After that, they were tested in the reaction of low-temperature sulphur dioxide oxidation with air oxygen. It has been found that N-CLI has no protective properties in respect of sulphur dioxide whereas CuCl2‑KX/N-CLI compositions have the significant protective activity in the process of air purification from sulphur dioxide in

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31

Tomina, Elena V., Aleksandr I. Dmitrenkov, and Konstantin V. Zhuzhukin. "The Use of Nanosized ZnO in Compositions for Wood Protective Treatment." Lesnoy Zhurnal (Forestry Journal), no. 4 (July 5, 2022): 173–84. http://dx.doi.org/10.37482/0536-1036-2022-4-173-184.

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Wood natural structure can be considered as a suitable matrix for modifying with nanoparticles of various chemical nature. The research aims at obtaining a woodbased nanocomposite by modifying wood with compositions of waste vegetable oil and zinc oxide nanoparticles and studying the properties of this nanocomposite. Silver birch (Betula pendula) wood samples were chosen as study objects. Refined sunflower oil left after cooking was the oil base of the developed impregnating compositions; nanosized zinc oxide powder was the filler and modifier. The sol-gel method providing a narrow range of pa

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32

Fu, Shu-Qin, Jian-Wei Guo, Dong-Yu Zhu, et al. "Novel halogen-free flame retardants based on adamantane for polycarbonate." RSC Advances 5, no. 82 (2015): 67054–65. http://dx.doi.org/10.1039/c5ra10887j.

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33

Berdnik, O. B., I. N. Tsareva, L. A. Krivina, et al. "Effects of structural inhomogeneities on the steel balls resistance to loading." Voprosy Materialovedeniya, no. 3(103) (November 30, 2020): 29–38. http://dx.doi.org/10.22349/1994-6716-2020-103-3-29-38.

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When conducting impact tests of protective glasses, nonunique cases of destruction of balls made of bearing steel ShKh15 were recorded. The causes of their destruction were determined. The state of the material was studied by fractographic and metallographic analysis, hardness and microhardness measurement. In the structure of the metal of all the balls, no critical defects were found such as flockens, shells and microcracks, but adverse factors were detected in the microstructure of the material, namely, the presence of fineneedle martensite with excessive carbides. It is established that the

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34

Leenson, I. A., J. Beckman, A. A. Krutikova, and A. A. Ischenko. "Sun Protective Means: The Characteristics and Action Efficiency." Materials Science Forum 757 (May 2013): 25–68. http://dx.doi.org/10.4028/www.scientific.net/msf.757.25.

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Modern sun protective means (SPM) represent complex compositions of substances which provide effective protection of a person’s skin against sunlight. Organic and inorganic sun protective filters (sunscreens) or combinations of them are used as the active components of SPM. Organic sunscreens absorb ultraviolet radiation due to the presence of chromophores in their structure; while action of inorganic sunscreens is based on physical mechanism of protection, such as dispersion, absorption and reflection of ultraviolet (UV) radiation by inorganic particles. Silicon nanocrystals have attracted in

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35

Steude, G., T. Christmann, B. K. Meyer, et al. "Optical Investigations of AlGaN on GaN Epitaxial Films." MRS Internet Journal of Nitride Semiconductor Research 4, S1 (1999): 244–49. http://dx.doi.org/10.1557/s1092578300002532.

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We have investigated AlxGa1−xN /GaN heterostructures (0<x<0.22) grown by metal organic vapor phase epitaxy on sapphire with photoluminescence (PL), reflexion and cathodo-luminescence experiments. The energetic positions of the free A-exciton in GaN and AlGaN as a function of the alloy compositions are deduced from temperature dependent PL and from reflexion measurements. We obtain a small bowing parameter and no evidence for a Stokes shift between absorption and emission. The AlxGa1−xN films induce additional compressive strain on the underlying GaN film. Compositional inhomogeneities ar

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Liu, Chang, Jacob A. Wrubel, Elliot Padgett, and Guido Bender. "Effects of Porous Transport Layer Coating Inhomogeneities on PEM Water Electrolyzer." ECS Meeting Abstracts MA2023-01, no. 36 (2023): 2058. http://dx.doi.org/10.1149/ma2023-01362058mtgabs.

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The porous transport layer (PTL) is a critical component of polymer electrolyte membrane (PEM) water electrolyzers, transporting water to the anode catalyst layer, conducting electrons, and removing the produced oxygen. Ti materials such as felts, mesh, and sintered powders are commonly used as PTLs at the anode due to the good corrosion resistance and conductivity of Ti. However, Ti forms an electrically resistive oxide surface layer that has detrimental effects on the performance and durability of PEM electrolyzer cells. In order to permit the use of Ti PTLs in PEM electrolyzers, platinum gr

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VU, MANH HUNG, A. N. GAIDADIN, V. F. KABLOV, A. A. KACHKOV, I. P. PETRYUK, and V. A. DROZDEV. "REGULARITIES OF CHANGES IN THERMOPHYSICAL PARAMETERS OF ELASTOMERS BASED ON ETHYLENE PROPYLENE RUBBER CONTAINING MICROSPHERES." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 12(295) (December 2024): 164–69. https://doi.org/10.35211/1990-5297-2024-12-295-164-169.

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The influence of hollow glass microspheres on the thermal properties of fire-protective materials based on ethylene-propylene rubber was assessed. The linear dependence of thermal diffusivity and thermal conductivity coefficients of compositions on the content of glass microspheres has been established. An assumption was made about the occurrence of non-covalent (supramolecular) interactions of elastomer compositions on the surface of the microspheres.

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Adamovich, Anna V., Vitalii V. Shevlyakov, and Tamara M. Yuraha. "Experimental eva luation of the protective properties of the original chewing compositions in relation to the toxic effect of water soluble nicotos-containing substances of the tobacco on an immature organism." Journal of the Belarusian State University. Biology, no. 1 (March 11, 2019): 13–24. http://dx.doi.org/10.33581/2521-1722-2019-1-13-24.

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On the experimental model of subchronic oral alkaloidization of immature white rats with their 59-daily consumption of aqueous extract from tobacco products in cyclically increasing concentrations of the total alkaloids, the potential protective properties of the developed original prophylactic chewable compositions (based on mexidol, glycine, vitamin complex and phytocomponents) in relation to toxic effect of the complex of soluble substances of tobacco were studied. The results of the study testify to the protective effect of prophylactic chewable compositions with their 2-week consumption o

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Knyazeva, L. G., L. E. Tsynagkova, A. V. Dorokhov, and N. A. Kuriato. "Protective properties of oil compositions modified with Cortec VpCI-369." Journal of Physics: Conference Series 1990, no. 1 (2021): 012068. http://dx.doi.org/10.1088/1742-6596/1990/1/012068.

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Ustinov, Andrey, Olga Zybina, Anastasia Tomakhova, and Sergey Pavlov. "The enhancement of operating properties of intumescent fire-protective compositions." MATEC Web of Conferences 245 (2018): 11008. http://dx.doi.org/10.1051/matecconf/201824511008.

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The paper overviews the operational properties of charred layers which are forming as a result of thermolytical synthesis of intumescent coatings, and the ways of enhancing those properties using different additives mixed with initial intumescent composition. Methods including differential thermal analysis, thermogravimetric analysis, microscale calorimetry and scanning electron microscopy were used to investigate the modified intumescent compositions and the properties of charred layers formed from them. Results show that additives tend to change the microstructure of char which undergoes som

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Ubas’kina, Yulia, Elena Chigorina, Anatoliy Razinov, Victoria Ryabenko, and Ivan Kovtun. "Optimal formulations of some asphalt concrete roadway protective impregnation compositions." Oriental Journal of Chemistry 32, no. 1 (2016): 305–11. http://dx.doi.org/10.13005/ojc/320134.

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PODKOSCIELNY, WAWRZYNIEC, BOGDAN TARASIUK, and WIESLAW M. PODKOSCIELNY. "UV-curcd polyurelhancacrylic compositions as protective coalings of optical waveguides." Polimery 38, no. 08/09 (1993): 432–37. http://dx.doi.org/10.14314/polimery.1993.432.

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Storozhuk, I. P., and N. G. Pavlyukovich. "Use of thiokolepoxy compositions as water-proof and protective coatings." Polymer materials and technologies 3, no. 1 (2017): 75–77. http://dx.doi.org/10.32864/polymmattech-2017-3-1-75-77.

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Sultangaleeva, A. E., V. E. Subbotin, A. Yu Shchepetova, N. V. Yashin, and V. V. Avdeev. "Thermolysis of Intumescent Fire-Protective Compositions Comprising Silane-Terminated Polymers." Doklady Physical Chemistry 518, no. 1-2 (2024): 129–36. https://doi.org/10.1134/s001250162560007x.

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Jaroszyński, Andrzej, Todd T. Schlegel, Jerzy Mosiewicz, Renata Stępień, and Wojciech Dąbrowski. "Heat Shock Protein 27 Levels Predict Myocardial Inhomogeneities in Hemodialysis Patients." Mediators of Inflammation 2022 (May 19, 2022): 1–6. http://dx.doi.org/10.1155/2022/5618867.

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Background. Sudden cardiac death (SCD) is the single major cause of death in hemodialysis (HD) patients. QRS-T angle is an established marker of global repolarization heterogeneity associated with electrical instability and SCD. Heat shock protein 27 (HSP27) plays an important, protective role against noxious factors in the cardiovascular (CV) system. This study is aimed at assessing whether low HSP27 is associated with myocardial inhomogeneities in HD patients, as expressed by increases in the spatial QRS-T angle. Methods. Clinical data and biochemical, echocardiographic, and electrocardiogra

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46

Knyazeva, Larisa, Nikolay Kur`yato, Andrey Dorokhov, and Viktoriya Kur`yato. "PRESERVATION COMPOSITION BASED ON BITUMEN PRIMER TO PROTECT CARBON STEEL FROM ATMOSPHERIC CORROSION." SCIENCE IN THE CENTRAL RUSSIA, no. 1 (February 28, 2025): 90–97. https://doi.org/10.35887/2305-2538-2025-1-90-97.

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The use of anticorrosive protection is necessary to extend the service life of agricultural equipment. For this purpose, the protective efficiency (Z) of preservation compositions based on a bitumen primer additionally containing a solvent (55 or 65 wt. %), an inhibiting additive (5 wt. %) Emulgin, and distillate residues of synthetic fatty acids (SR-SFA) in relation to carbon steel was studied. The Z value was estimated using gravimetric testing methods: in a 0.5 M NaCl solution, in a G-4 heat and moisture chamber, and in-kind bench tests. The results obtained during tests in an electrolyte s

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Aga-Zade, A. D., L. A. Cavadova, Dilafruz Kholmurodova, and Sanjar Ungalov. "Research on inhibiting properties of new schale deposition reagents." BIO Web of Conferences 151 (2025): 02004. https://doi.org/10.1051/bioconf/202515102004.

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New compositions for inhibiting scale deposits on oil-field equipment and pipelines have been developed based on a nitrogen- containing compound, inhibited hydrochloric acid, anionic polymer and water. The efficiency of inhibiting scale deposits was assessed using artificially prepared mineral waters of carbonate and sulfate types, simulating formation waters. It was found that the introduction of the prepared compositions into calcium sulfate and calcium carbonate solutions at a rate of 50 mg/l provides a high protective effect compared to an inhibitor consumption of 30 mg/l. The content of t

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Dmitrenkov, A., N. Nikulina, S. Nikulin, and G. Vostrikova. "Ways to improve the properties of natural wood when using waste vegetable oils." IOP Conference Series: Earth and Environmental Science 875, no. 1 (2021): 012063. http://dx.doi.org/10.1088/1755-1315/875/1/012063.

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Abstract The article is devoted to the development and study of new compositions based on spent sunflower oil for the protective treatment of natural wood. Samples of birch and aspen wood were selected as the subjects of the study. The processing of wood samples was carried out by the method of “hot-cold impregnation”. Refined sunflower oil was used as the oil base of the propearized compounds developed. Plant oil fillers were chosen wood flour, stearic acid, canifol and sikkativ based on metal salts. The use of developed compounds can improve the hydrophobic properties of wood, increase its w

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Tang, Ling, Yang Li, Cheng Zhong, Xin Deng, and Xiaohua Wang. "Plant Sterol Clustering Correlates with Membrane Microdomains as Revealed by Optical and Computational Microscopy." Membranes 11, no. 10 (2021): 747. http://dx.doi.org/10.3390/membranes11100747.

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Local inhomogeneities in lipid composition play a crucial role in the regulation of signal transduction and membrane traffic. This is particularly the case for plant plasma membrane, which is enriched in specific lipids, such as free and conjugated forms of phytosterols and typical phytosphingolipids. Nevertheless, most evidence for microdomains in cells remains indirect, and the nature of membrane inhomogeneities has been difficult to characterize. We used a new push–pull pyrene probe and fluorescence lifetime imaging microscopy (FLIM) combined with all-atom multiscale molecular dynamics simu

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Uryadnikov, Alexender, Viktoria Bryksina, Marina Uryadnikova, Galina Berdnikova, Olga Alehina, and Daria Koroveva. "EVALUATION OF THE EFFICIENCY OF INTRODUCING A SERIES OF ADDITIVES INTO USED ENGINE OIL TO PROTECT AGRICULTURAL MACHINERY DURING OFF-SEASON STORAGE." SCIENCE IN THE CENTRAL RUSSIA, no. 6 (December 26, 2022): 109–19. http://dx.doi.org/10.35887/2305-2538-2022-6-109-119.

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The search for effective conservation materials to protect agricultural machinery from atmospheric corrosion during off-season storage continues to be an urgent task. Compositions based on used engine synthetic oil with emulgin and paraffin additives at a concentration of 1–10 wt. % investigated for its solution. Preservative compositions were prepared by dissolving a multifunctional additive in used oil when heated. Corrosion and electrochemical tests were carried out on samples of steel St3, a protective film of the studied composition was formed within 15 minutes. The effectiveness of anti-

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