Materials Literature
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Abstract Hierarchical nanostructured Al‐doped ZnO (AZO) powders were successfully prepared through a mild solution route. The crystal structure and morphology of AZO were determined by X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy. The morphology of the samples changed from rand…
The solution structure of the monomeric glutamine amidotransferase (GATase) subunit of the Methanocaldococcus janaschii (Mj) guanosine monophosphate synthetase (GMPS) has been determined using high-resolution nuclear magnetic resonance methods. Gel filtration chromatography and ¹⁵N backbone relaxation studies have sho…
Open filters (with low pressure drop) have potential for energy-efficient reduction of particulate matter (PM) from engines. In the work reported here, the capture efficiency of PM in open substrates has been investigated using PM from a real engine under various flow conditions and sampling settings. The observed cap…
Density-functional theory within the local density approximation $+$ Hubbard $U$ approach was used to study interface electronic structures in stoichiometric and oxygen-deficient LaAlO${}_{3}$/SrTiO${}_{3}$ (LAO/STO) superlattices with regularly spaced $n$-type and $p$-type interfaces. Asymmetric behaviors between com…
This study aimed to evaluate the physical-mechanical properties of particleboard from pine, with different levels of paraffin. To this, were produced in laboratories panels of pine wood Pinus oocarpa paraffin and concentration of 0; 1; 1,5 and 2%. We evaluated the quality of the panels through its physical and mechani…
The pulp black liquor waste (PBL), a byproduct from paper-making, is applied as a cement admixture in two types of cement, namely Ordinary Portland cement (OPC) and Portland limestone cement (LPC). The results showed that the water of consistency of cement pastes premixed with PBL was gradually increased with the conc…
Hyper-cross-linked resins stemming from a gel-type poly-chloromethylated poly(styrene-co-divinylbenzene) resin (GT) have been investigated by a multi-methodological approach based on elemental analysis, scanning electron microscopy, X-ray microanalysis, and solvent absorption. The hyper-cross-linking of the parent res…
Oscillators composed of incommensurate graphene sheets have been investigated by molecular dynamics simulations. The oscillation frequencies can reach tens of gigahertz range and depend on the surface energy of the bilayer graphene and the oscillatory amplitude. We demonstrate the tunability of such an oscillator in t…
Abstract On the basis of prior X-ray crystallographic results published by J. Janczak and G. Perpetuo, detailed vibrational studies were performed. The FT-IR and Raman spectra at ambient temperature were measured. The NLO properties were determined with the Kurtz-Perry experiment. Theoretical vibrational spectra were…
Two new mesogenic homologous series, each containing 1,3,5-trisubstituted pyrazolone derivatives, 4-n-alkoxyphenyl and Schiff base–cinnamate central linkages, have been synthesised to give 4-[(5-hydroxy-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl) methyleneamino] phenyl 3-(4-n-alkoxyphenyl)acrylate [Series-A] and 4-…
1 - The aim of this study was to analyse spatial and temporal patterns among phytoplankton diatom communities for assessing water quality in the Curonian Lagoon, SE Baltic Sea. The study of diatoms in sediments was selected as a method to establish if these records are useful for reviewing the environmental conditions…
Numerical simulations followed by experimental validations were carried out to study the interaction of the fundamental Lamb modes when incident at the front edge of a horizontal crack in a metallic plate. During the interaction, the incident fundamental Lamb mode underwent mode conversion and started propagating in t…
An increased level of harmonics due to the proliferation of single-phase nonlinear loads is raising serious concerns among utilities. Historically, passive filters have been proposed to reduce harmonics in medium-voltage (MV) utility applications. However, due to their limitations, utilities are turning their attentio…
We have succeeded in achieving high-quality thin InN films (<500 nm) by low-plasma-power growth. In this study, we investigated the thickness dependence of the structural and electrical properties of relatively thin InN films grown by radio-frequency plasma-assisted molecular beam epitaxy (RF-MBE). InN films were grow…
The currently known methods for synthesis of meso-substituted tetrabenzoporphyrins of different structures are reviewed. Characteristic features of each method are demonstrated, and their comparative analysis is presented. The bibliography includes 104 references.
The evaporation mechanisms from a solid target in pulsed electron deposition (PED) technique have been investigated by analysing the chemical composition and the thickness distribution of CuGaSe 2 (CGS) films grown at different discharge voltages on glass substrates. The behaviour of the plasma plume generated from th…
Preparation of high-quality polished sample surfaces is an essential step in the collection of microanalytical data on the microstructures of minerals and alloys. Poorly prepared samples can yield insufficient or inconsistent results and, in the case of gold, potentially no data due to the "beilby" layer. Currently, p…
A free-standing GaN layer was produced by combining electrochemical (EC) etching from the front surface, photo-electrochemical (PEC) etching from the back surface, and subsequent regrowth of GaN on the porous template thus produced. The EC etching resulted in the formation of etch channels on the surface portion of th…
Innovative diesel particulate (PM) collection and NOxreduction technology were developed using plasma-combined systems over the years. As for PM control, the electrohydrodynamically assisted electrostatic precipitator (EHD ESP) to collect low resistive diesel PM and the plasma ESP to collect and incinerate PM were dev…
This study represents the recent laboratory results from cathodic protection (CP) system with the use of sacrificial anodes at different environmental conditions (temperature of $10^{\circ}C$ and $40^{\circ}C$ ). Specimens were slab type with a dimension of $500mm{\times}50mm{\times}100mm$ , and concrete cover thickne…