Materials Literature
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In this paper, the effect of silicone softener application on low-stress mechanical and surface properties of textile materials is investigated using the Kawabata evaluation system for fabrics. Regression equations are derived to describe the influence of the treatment conditions—temperature, curing time, and softener…
Growth histories of contact twins of natural diamond have been elucidated by nondestructive techniques of X-ray topography, using both conventional and synchrotron sources. Reflection conditions for the simultaneous imaging of both members of a diamond, twinned on (111), are given. The common `triangular' contact twin…
A procedure to determine dialysate pressure isobars by comparing the results of magnetic resonance imaging (MRI) and numerical simulation of the dialysate flow was established. The assumption used in the filtration analyses, that the dialysate pressure varies only in the central-axial direction, is supported by the fi…
Frozen crystals of proteins, nucleic acids or other biological macromolecules often have mosaic spreads comparable to the maximum useful oscillation angles. It is, therefore, necessary to develop scaling methods that are independent of the exclusive use of full reflections. The Hamilton, Rollett and Sparks [ Acta Crys…
Ceramic samples of Sr1-xCdxTiO3 and (1-x)SrTiO3–(x)KNbO3 solid solutions were investigated using a dielectric technique in the temperature range from 4.2 K to 300 K at frequencies of 1 kHz and 1 MHz. Phase diagrams of these systems are derived. It is shown that there are ferroelectric phase transitions in Sr1-x Cd x T…
The disorder at room temperature in crystalline Cs 2 HgCl 4 , dicaesium mercury tetrachloride, is studied by the Maximum Entropy Method (MEM). X-ray scattering up to θ = 30° (Mo K α radiation) revealed the orthorhombic space group Pnma , with a = 9.8136 (9), b = 7.6018 (6) and c = 13.4201 (9) Å. Refinement converged t…
Abstract The sorption capacity of hydrotalcite (HT) and its calcined product (CHT) was evaluated for 131 I − sorption from water solution and it was determined as a function of the calcining temperature. The radionuclide content was determined by γ-spectrometry. Solids were characterized by thermal analysis, X-ray dif…
Optical absorption spectra of TlInS2 single crystals were investigated in the temperature range of 10–340 K. The exponentially increasing absorption tails were explained as Urbach tails. TlInS2 single crystals exhibited five different convergent groups of lines ln α(E,T) having different convergence points of E0 and α…
We report progress in the development of a monolithic, self‐powered photovoltaic‐electrochromic coating for energy‐conserving windows. The coating employs an all solid‐state electrochromic device based on Li‐doped as an optical transmittance modulator and a wide‐bandgap amorphous SiC alloy (a‐SiC:H) photovoltaic (PV)…
The melting transition of a system of hard cubes is studied numerically both in the case of freely rotating cubes and when there is a fixed orientation of the particles: parallel cubes. It is shown that freely rotating cubes melt through a first-order transition, whereas parallel cubes have a continuous transition in…
Abstract Binuclear iron(III) spin-crossover complex [Fe2(salten)2(az)](BPh4)2 (az = azobis(4-pyridine)) was synthesized and characterized by X-ray single-crystal diffraction, Mössbauer spectra, magnetic susceptibilities and electronic spectra. This complex contains the ligand which is able to photoisomerize as a bridg…
We report measurements of Raman spectra and infrared-absorption spectra of hexagonal ${\mathrm{BaMnO}}_{3}$ in its polycrystalline form. The results are discussed in the framework of a group-theoretical analysis of the allowed zero-wave-vector phonons in this compound. The temperature dependence of the frequency and l…
Block copolymers of unsubstituted poly(p-xylylene)(PPX) and Ge- or Sn-organic bridged PPX (GePPX and SnPPX) were prepared by pyrolysis of specially synthesized organometallic p-cyclophane precursors followed by deposition and polymerization of the thus produced p-xylylene monomers. The copolymer structure and thermal…
X-ray diffraction based on the comparison of experimental and calculated powder profiles enabled the determination of the structural characteristics of hydrated and dehydrated Tunisian nacrite. Using the concept describing the structure of natural nacrite, the stacking mode of the layers in the hydrated and dehydrated…
Organophosphazenes with a similar mesogenic moiety were prepared and their mesogenicity was studied by differential scanning calorinetry (DSC) measurements and polarizing microsope observations. In cyclotriphosphazenes with alk-oxybiphenyl and Schiff base moieties, mesomorphic phase transitions were observed, but no…
We report on the results of optical, X-ray and NMR studies of light-induced phenomena in smectic phases triggered by molecular phototransformations. UV irradiation causes trans-to-cis isomerization of the dopant molecules while irradiation in the visible part of the spectrum facilitates cis-to-trans relaxation. Cis-to…
New pentacyano complexes of tri- and tetravalent platinum were obtained in aqueous solution and characterized by multinuclear NMR ((195)Pt, (13)C) supported by Raman spectroscopy. The complexes form as products of redox decomposition of metal-metal bonded platinum-thallium compounds. The trimetallic [(NC)(5)Pt-Tl-Pt(C…
Abstract The populations of four aliphatic polyester-degrading microorganisms at 50 °C were demonstrated in vitro. The percentage of degraders to total microorganisms were: 5-86%, PHB; 3-49%, PCL; 0-87.5%, PBS; and 0-4.5%, PLA.
An overview of contemporary methods of crystal structure solution from powder diffraction data is given.Methods are compared with respect to their advantages and disadvantages.A choice of an appropriate method is discussed in the light of understanding the structural problem to be solved.The need of the variety of met…
Transparent and crack-free SrTiO3 thin films were prepared on fused silica substrates by a sol–gel technique. Strontium acetate and titanium tetra-n-butoxide were used as starting materials. The structural properties of the thin films were studied by X-ray diffraction. The films annealed at 700 °C have good crystallin…