Materials Literature
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The mechanistic theory of drying is developed for the purpose of stress and strain analysis in wet clay-like materials subjected to convective drying. The aim of these studies is to show the difference in stress and strain patterns for cases when the material is considered to be elastic, viscoelastic, or elastic-plast…
Resonant soft x-ray powder diffraction experiments on orthorhombic TmMnO${}_{3}$ and LuMnO${}_{3}$ are presented. Experiments were performed in the vicinity of the Tm ${M}_{5}$ and the Mn ${L}_{2,3}$ edges to study the Tm and Mn magnetic moments, respectively. These experiments show that for the heavy rare-earth perov…
The recognition of some globular proteins was carried out in aqueous solution, at micromolar concentrations, by using an uncharged symmetrical cobalt-porphyrin (Co-P). By means of UV/Vis, induced circular dichroism, and fluorescence spectroscopy techniques, it was ascertained that the interactions between specific ami…
Unrestrained refinement is stable for the vast majority of atoms when working at atomic resolution. Nevertheless, geometrical restraints should be retained in refinement for residues that are present in several (alternative) conformations in the crystal used for the X-ray experiment; otherwise, such residues deteriora…
Abstract The long range potential fluctuations (LRPFs) arising from the defects and heterogeneities in disordered semiconductors are important for understanding their atomic and electronic properties. Here, they are measured in Ge X Sb Y Te 1− X − Y (GST) chalcogenide glasses used in rewritable phase change memory (PC…
The relationship between structural and surface properties of γ‐alumina prepared by various methods has been studied, and the adsorption ability of the powders for cobalt ions from aqueous solution is presented, based on the results of X‐ray diffraction, specific surface area, scanning electron microscopy, and surface…
Intense near-ultraviolet (UV) upconversion emission of 365 nm has been obtained in Tm3+/Yb3+co-doped lithium gallogermanate oxide glass upon a 980-nm laser diode excitation. This near-UV emission originates from the Tm3+:1D2→3H6transition. The cross relaxation process [1G4,3H4]→[3F4,1D2] is shown to play a critical ro…
Abstract We study comparatively some characteristics of photodarkening and photoexpansion in chalcogenide glasses. In thicker samples, both grow more slowly, but the thickness variations are different. The feature can be understood with an idea that the two phenomena originate from a common atomic displacement, while…
In this this paper we quickly derive the Kramers-Kronig relations from simple causality considerations and propose a simple way to implement them using the Fast Fourier Transform. This work focuses on how to make these relations a usable tool even when their conditions of validity are not strictly respected. In this r…
ABSTRACT: This chapter firstly presents a new 3D mesoscale model, in which random distribution of coarse aggregate with random shapes and sizes in mortar matrix is simulated, to analyze the mechanical behavior of unreinforced concrete under static and dynamic loadings. A good agreement is observed between the numerica…
Specific radiation damage can be used for the phasing of macromolecular crystal structures. In practice, however, the optimization of the X-ray dose used to `burn' the crystal to induce specific damage can be difficult. Here, a method is presented in which a single large data set that has not been optimized in any way…
Abstract A study on lactic acid polycondensation under melt conditions was carried out and a preliminary assessment revealed tin powder as a very good catalyst for poly(lactic acid) (PLA) synthesis by melt polycondensation while confirming previous information on SnCl 2 good performance. However, these catalysts also…
Abstract A theoretical model is presented for magnetoelectric (ME) effects in multi-push–pull mode magnetostrictive/piezo-fibre laminate composites. Analytical solutions for the ME coefficient ( α ME ) were derived. The effects of thickness ratio of the magnetostrictive phase, Kapton and multiple layers of epoxy on th…
Melt crystallization of ibuprofen was studied to understand the effects of humidity and surfaces. The molecular self-assembly during the amorphous-to-crystal transformation was examined in terms of the nucleation and growth of the crystals. The crystallization was on Al, Au, and self-assembled monolayers with -CH(3),…
The effect of (60)Co gamma rays irradiation on the polymetallayne [-Pt(PBu(3))-C≡C-C(6)H(4)-C(6)H(4)-C≡C-](n) (Pt-DEBP) of defined chain length corresponding to 10 repeat units, has been studied in detail. The UV-vis absorption spectra of Pt-DEBP have been recorded in solution upon exposure of the polymetallayne at in…
Abstract Ab initio density functional theory (DFT) calculations were carried out to investigate alloy solid solution strengthening of hexagonal close packed (HCP) Mg. The binary solid solution Mg–X base alloys (X = Gd, Nd, Ce, Bi, In, and Sn) were examined to identify a possible valence effect on the solution strength…
Aluminum complexes coordinated by a C1DEA BTP ligand ( C1DEA BTP‐H = 2‐(2 H ‐benzotriazol‐2‐yl)‐6‐((diethylamino)methyl)‐4‐methylphenol) were synthesized and structurally characterized. The formation of Al complexes is dependent on the stoichiometry of AlMe 3 to C1DEA BTP ligand ratio. The reaction of C1DEA BTP‐H with…
Porous silicon layers were elaborated by electrochemical etching of heavily doped p-type silicon substrates. Metallization of porous silicon was carried out by immersion of substrates in diluted aqueous solution of nickel. Amorphous silicon thin films were deposited by plasma-enhanced chemical vapor deposition on meta…
Ultrasound-sensitive (sonosensitive) liposomes for tumor targeting have been studied in order to increase the antitumor efficacy of drugs and decrease the associated severe side effects. Liposomal contrast agents having Gd(III) are known as a nano-contrast agent system for the efficient and selective delivery of contr…
Zinc is a suitable metal for anomalous dispersion phasing methods in protein crystallography. Structure determination using zinc anomalous scattering has been almost exclusively limited to proteins with intrinsically bound zinc(s). Here, it is reported that multiple zinc ions can easily be charged onto the surface of…