Materials Literature
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Heterogeneous catalysis is an important tool in industrial processes because of the recoverability of the catalysts. Transition metal perovskites-type oxides, with the general formula ABO3, offer attractive alternative to noble metal catalysts due to their high activity, high thermal stability, and low cost. Moreover,…
"Uninformed guidelines for mechanical in-exsufflation." Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration, 17(3-4), p. 304
Abstract In this work, a novel molecule pyridinyl?uorene/triphenylamine hybrid (TPyFTPA) with bulky steric hindrance effects has been synthesized successfully by substituting 9‐(pyridine‐2‐yl)‐fluoren‐9‐yl with triphenylamine (TPA) via Friedel‐Crafts reaction, which possesses good thermal stability and triplet energy…
2,3-Dinitrotoluene (2,3-DNT) thermal decomposition and its products were studied. Main attention was paid on the initial stage of decomposition, because the degradation of even a few percent of high energetic compound may cause significant hazard. Partial decomposition of 2,3-DNT was performed conditioning at the temp…
The work presents the studies on the epoxidation of allyl-glycidyl ether (AGE) to diglycidyl ether (DGE) over the mesoporous Ti-SBA-15 catalyst and with 60 wt% hydrogen peroxide. The influence of the following parameters was studied: the temperature 0–100°C, the molar ratio of AGE/H2O2 = 0.03:1 – 4:1, the content of T…
ZnSTe epitaxial layers with , nearly lattice-matched to GaP substrates, have been grown by molecular beam epitaxy. Direct growth of the layers onto the substrates results in poor crystal quality, showing no sign of coherent growth. This seems to be due to alloy composition deviation at the initial stage of the growth.…
A new type of nanomaterial can deliver siRNA and mRNA in vivo with high efficiency and low toxicity.
Sepiolite-supported ZnO catalysts (ZnO-SEP) were prepared and characterized using X-ray diffraction (XRD), surface area (BET) measurements, scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectra (UV-vis DRS) techniqu…
In this paper, (InxAl1–xN/AlN) MQWs/InN/GaN heterostructure with a (InxAl1–xN/AlN) MQWs barrier layer and an InN channel layer is presented. The numerical calculations of 2DEG characteristics are made using a self‐consistent solution of the Schrödinger and Poisson equations. The influence of (InxAl1–xN/AlN) MQWs and I…
In this research the shape memory effect of commercial NiTi sheets has been investigated. Four commercial SMA elements have been characterized. Tensile tests (load-unload cycles) have been performed at various constant temperatures (from room temperature up to 60 °C). Stress -strain curves have been analyzed and discu…
Carbon nanotubes (CNTs) superiority have been proved by many experiments and studies. Molecular Dynamics was vastly used by many researchers to analyze properties of CNTs in atomistic scale with various interaction potentials (Force fields). Most of the carbon based interaction potentials were parameterized with cut-o…
Due to the unique characteristics such as simple low-temperature preparation method and high efficiency with a record of over 20%, organometal trihalide perovskite (CH3NH3PbI3)-based solid-state hybrid solar cells have attracted an increasing interest since 2012 when it was reported. During the last several years, som…
We investigate the structural and thermodynamical properties of small silicon clusters. Using the graph theory applied to previously obtained structures of Si 10 H 2m clusters we trace the connection between geometry and passivation degree. The existing data on these clusters and structures of Si 10 O 4n clusters obta…
Abstract The reasons for the significant difference of PA6 spinnability are discussed. For this research project, BASF PA6 chips (BASF, Germany) and PA6 chips (GC, China) were chosen as research objects. We chose these two different chips because BASF PA6 chips are stable and GC PA6 chips are unstable in high-speed sp…
A conjugated polymer, poly(9,9‐bis(6‐bromohexyl)‐9H‐fluorene‐alt‐1,4‐phenylene), is synthesized, converted to nanoparticles via a nanoprecipitation process, and utilized to fabricate thin films including conjugated polymer nanoparticles. The nanoparticles with surface bromides can be conjugated with an amine‐functiona…
The paper presents and energy management strategy for a Fuel Cell, Ultracapacitor, Battery hybrid energy storage. The fuel cell hybrid power system is devised basically for emergency power requirements and transient load applications. The power density of an Ultracapacitor is extremely high and for a battery, it is su…
The experimental study of water vapour adsorption phenomenon on a zeolite, by dielectric relaxation measurement, makes it possible to determine the variations in the exchangeable cation hopping activation energy, on the surface of the solid, in relation to the number of adsorbed molecules. The present work shows that…
Hydroxyalkylation of N‐vinylcaprolactam (NVCL) in α‐position via ring‐opening reaction of propylene oxide and ε‐caprolactone, respectively, yields in precursors for multifunctional NVCL derivatives. Homo‐ and copolymers of hydroxyfunctionalized NVCL derivatives, synthesized by free radical mechanism, are further inves…
The isotropic-to-nematic phase transition in a melt of semi-flexible homopolymers with length polydispersity have been considered within the Landau–de Gennes approach. The number of monomer units in chain is assumed to be a random variable distributed by the Schulz–Zimm distribution; the stiffness of macromolecules ha…
Methylated poly(vinyl amine) and its copolymer with diallyldimethylammonium chloride (DADMAC) were prepared by polymerization of N-vinyl formamide (NVF) or copolymerization with DADMAC. Acid hydrolysis of the polymers and subsequent methylation yielded corresponding polyamines. Co(II) complexes of the polyamines were…