Materials Literature
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Four alkyl propargyl bis(hydroxyethyl) ammonium surfactants with different lengths in hydrophobic tail (C8–C16) are prepared by direct alkylation of diethanolamine with alkyl bromides. The surfactants exhibit excellent surface properties. The critical micelle concentration (CMC) values of the surfactants 2c and 2d are…
First-principles many-body theory and time-dependent density functional theory were used to study the dimension effects on the band alignment and optical properties of s -triazine and graphitic C 3 N 4 .
The utilization of renewable resource such as biomass in the production of green materials as an alternative to petrochemistry is increasing due to the depleting fossil resources and the increasing CO2 emission. The present study focused on the use of tetraethoxysilane (TEOS) and dodecyltriethoxysilane (DTES) to modif…
Owing to its extraordinary range of properties, yttria-doped zirconia holds a unique place among the ceramic oxide systems. To improve the properties for some specific custom design applications, co-doping with other rare earth oxides such as ceria is needed. The aim of this paper is to identify the correlations betwe…
This study investigates the phytosynthesis, characterization, and antibacterial efficacy of silver and gold nanoparticles (NPs) produced using the hot water extract of mixed woodchip powder. The woodchip extract (WCE) was successfully used as both a reducing and stabilizing agent for the phytosynthesis of both crystal…
. Interestingly, ultrasound treatment of isotropic solutions (i.e., gel-precursor) resulted in a remarkable enhancement of the gelation kinetics as well as the gelation scope and characteristic gel properties (e.g., critical gelation concentration, gel-to-sol transition temperature, viscoelastic moduli) in comparison…
To assess the reliability of weldments of a super duplex stainless-steel (UNS S32750), we have studied how the microstructure and fatigue strength of a welded joint is affected by post-weld heat treatment, focusing on the formation of the intermetallic phase during cooling. The microstructure of the welded zone of arc…
Потапов Александр Николаевич, доктор технических наук, доцент, профессор кафедры «Строительное производство и теория сооружений», Южно-Уральский государственный университет (Челябинск), popatov.alni@gmail.com A.N. Potapov, popatov.alni@gmail.com South Ural State University, Chelyabinsk, Russian Federation
The paper considers the problem of stability of a viscoelastic plate subjected to intermittent load. A differential equation was designed, which describes the dynamic stability of the plate stressed by permanent and alternating loads across the plate’s plane. A solution in the form of a series with separated variables…
We have synthesized three novel octakis([Formula: see text]-chloropyridyloxy)phthalocyaninato copper(II) complexes, [x-PyO(m-Cl)][Formula: see text]PcCu([Formula: see text] [Formula: see text] 2, 3, 4: 2a–2c), keeping a chlorine atom at the meta position on the 2-, 3- and 4-pyridyloxy group, in which the nitrogen atom…
Conceptual design is a field that offers various aesthetic approaches to generation of nature-based product design concepts. Essentially, Conceptual Product Design (CPD) uses similarities based on the geometrical forms and functionalities. Furthermore, the CAD-based freehand sketch is a primary conceptual tool in the…
SEM and optical microscopy, chemical and EDX analysis, XRD, and FT-IR spectroscopy of three sea urchins skeletons (tests) show that the test is a spongy stereom, consisting of calcite with high content of magnesium. The tests are composed of mineral-organic composite of calcite-magnesite crystals, coated with organic…
A novel sandwich-type electrochemical aptasensor has been fabricated and applied for sensitive and selective detection of antibiotic oxytetracycline (OTC). This sensor was based on graphene-three dimensional nanostructure gold nanocomposite (GR-3D Au) and aptamer-AuNPs-horseradish peroxidase (HRP) nanoprobes as signal…
Mixed ligand shells are frequently employed to impart multiple and new functions to inorganic nanoparticles.
In the present work graft polymers PVA-U were prepared from reaction polyvinyl alcohol PVA and urea. Were blending 8% PVA-U and 5% Hydroxypropyl methylcellulose HPMC in different ratio 100:0, 75:25 and 50:50 with using glutaraldehyde as crosslinked agent in different ratio 0.5, 0.75, 1.0 and 1.25 ml/dl. The structure…
nanocatalysts were used to catalyze the silylcyanation reaction at room temperature, which exhibited excellent catalytic activity with outstanding recyclability.
Herringbone carbon nanofibers (HCNFs) are prepared for use as anode materials in lithium-ion batteries (LIBs).
We investigated effect of retained β phase on mechanical properties of cast Ti-6Al-4V alloy, after solution treatment and subsequent aging for a short time. The alloy was solution-treated at 1123, 1223 K in the α + β phase region and 1323 K in the β phase region for 1800 s, followed by water quenching. After that, as-…
In the past few years, numerous researches have focused on the self-assembly of amyloid peptides and proteins. Especially, the self-assembly of peptides and proteins at interfaces has attracted much attention, on account of the potential applications as well as understanding mechanism of some neurodegenerative disease…
Simvastatin (SV) is a cholesterol-lowering drug of choice classified into a class II of drugs based on bbiopharmaceutical cclassification ssystem (BCS), which is a drug that has a poor solubility but high permeability. Low solubility drug caused a low bioavailability in the blood before it reached its workplace. Cocry…