Materials Literature
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Polishchuk, V. A. Determination of spring elements characteristics using shape memory effect during thermomechanical impact = Определение параметров пружинных элементов с эффектом памяти формы в процессе термомеханических воздействий / V. A. Polishchuk, O. L. Nikolaiev, T. P. Zadorozhnaya // Зб. наук. пр. НУК. – Микол…
People living and working in buildings constructed from natural materials such as sandstone, concrete, calcite, gypsum, marble and granite are exposed to a surplus of background radiation from naturally occurring radioactive materials. The above materials contain naturally occurring radioactive elements such as potass…
Binary mixtures of block copolymers E 114 CL 20 and E 97 P 69 E 97 (F127 ) were prepared in order to tailor a drug delivery system with synergistic effect, concerning dilution stability and high drug solubility. Both reduction of the critical micelle concentrations (CMC) values and enhance hydrophobic drug solubility…
Using a non-vacuum electron beam, a two-step process chain for plate materials is a feasible possibility. Cutting and welding can be performed in subsequent steps on the same machine for a highly productive process chain. The electron beam is a tool with high energy conversion efficiency, which is largely independent…
Modified silyl-terminated polyether polymer (MS Polymer) was blended with bisphenol A diglycidyl ether (DGEBPA) epoxy at MS Polymer/epoxy ratio from 30/70 to 70/30. MS Polymer/epoxy systems were examined for two-component adhesive formulation with additional fillers. Applicability of the MS Polymer/epoxy system at the…
The thermocapillary flow in a thin horizontal layer of viscous incompressible liquid with free surface is considered. The deformable liquid layer is locally heated. The problem of thermocapillary deformation of the locally heated horizontal liquid layer has been solved numerically for two-dimensional unsteady case. Th…
The tribological properties of sintered Al-40Sn alloy under dry friction were studied. Before the tests, the samples were treated by equal channel angular pressing (ECAP) via routes A and C. The initial cellular structure of the sintered two-phase alloy restored after each even pressing with route C and transformed in…
Isopropyl octanoate is an ester used in the formulation of cosmetics, foods, medicines, and other products. The peculiar thermodynamic and kinetic factors, allied with the demand for the applications mentioned above, justify the development of an optimized process for its synthesis. In the present article, the esterif…
Questions regarding the safe storage, reprocessing and disposal of radioactive waste continue to occupy scientists, politicians and lawyers alike. Effectively, there are three main types of radioactive waste: low-, intermediate- and high-level radioactive waste. At the end of their useful lifetime, radioactive materia…
There is no broad-based antiviral medication available today; there are specific antivirals, for example, the antiretroviral for HIV. However, these specific antivirals are not available in each country and can be problematic for specific patients. Chitosan is proposed as a possible broad-based antiviral, which has al…
b) 80 nm
The current trend in graphene synthesis is to use thermal chemical vapor deposition(CVD) at the temperature of 1000 °C or higher. For industrial use of graphene as transparent conductive films, higher throughput of graphene synthesis is necessary. We were among the first to adopt the plasma-enhanced CVD method, and ha…
Silica (SiO 2 ) was used to modify the waterborne ultraviolet (UV) curing wood coatings, and the waterborne UV curing wood coating was prepared by optimizing the process parameters. The mechanical properties of the waterborne UV curing wood coating (hardness, adhesion and impact strength) and gloss were tested. When t…
In this article Cd-Zn sulphide thin films deposited onto soda lime glass substrates via chemical bath deposition (CBD) technique were investigated for photovoltaic applications. The synthesized films were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet visible (UV-Vis) s…
Fresh ZSM-5 zeolite catalysts were pretreated at 460 ℃�and 500 ℃�with various cumulative amount of water feed (CAWF) in a fixed bed reactor. The catalytic process was carried out under the following conditions: a temperature of 480 ℃; a methanol WHSV of 3 h -1 ; a methanol partial pressure of 30 kPa; and a time on str…
The optimized tube’s structure of the self-design ozone generator was made with the double dielectric inner electrode and small metal cones were embedded in the outside electrode. This ozone generator was used for the degradation of phenol in wastewater. The research was studied from ozone gas flow rate, reaction time…
Magnetic carbon submicron spheres possessing good sorption abilities and easy collection are of interest in environmental engineering including oil spill cleanup.
Number of experimental studies particularly aimed to relate the corrosion cracking appearance on the concrete surface with the corrosion ratio of steel bars have been conducted using an accelerated corrosion test to save time. The corrosion ratios during the test were generally evaluated by a linear interpolation from…
In the long term, renewable raw materials should be used as favorite materials for applications in the electronic industry, but very high specifications for substrate materials make the use of biopolymers in electronics difficult. In this work, thermoplastic lignin is used as renewable raw material for electronic appl…
We report the first solid-state-laser pumped by a LED concentrator. This Ce:YAG concentrator emits up to 1 kW peak power with an irradiance reaching 7 kW/cm2 with optical efficiency of 25%, which is suitable to pump a Nd:YVO4 crystal.