Materials Literature
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The variation of intensity of the photostimulated luminescence (PSL) of BaFCl:Eu2+ after ultraviolet irradiation with temperature has been investigated. The results show that the PSL intensity is independent of temperature in the readout process, but the storage ability is temperature dependent. The measurements suppo…
Abstract A crystal structure is usually described as the union of sets of symmetrically equivalent atoms, i.e. as the union of orbits. During a continuous or nearly continuous phase transition, symmetrically equivalent atoms of a crystal structure may become inequivalent, their site symmetries may be reduced, or both…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhenolics of Picnomon acarnaGregory G. Laskaris, Dimitris C. Gournelis, and Eugene KokkalouCite this: J. Nat. Prod. 1995, 58, 8, 1248–1250Publication Date (Print):August 1, 1995Publication History Published online1 July 2004Published inissue 1 August 1995https://doi.org/10.1…
Croconic acid, H 2 C 5 O 5 , is readily oxidized. This may be attested by decolorization of the solutions and by observation of oxalic acid complexes. The oxidation products are identified by 13 C NMR spectroscopy as oxalic and mesoxalic acids, and experimental conditions are specified. The oxidation process requires…
The crystallization and fractal formation in a-Ge/Au have been studied by in situ TEM and HREM. It was demonstrated that both the crystallization and the fractal formation depend on the continuity of the Au underlayer and the thickness of the a-Ge layer. As the Au film changed from semicontinuous to discontinuous, the…
Abstract Morphological aspects of the evolution of a gas ‐ solid interface during typical CVD processes are presented, as well as a continuum model of CVD growth. A linear stability analysis used determines the effect of reactor conditions on the stability of planar growth. The main focus, however, is numerical soluti…
Abstract Conventional Raman and incident circular polarization Raman optical activity (ROA) spectra are presented for the lattice vibrations of enantiomorphic pairs of optically active cubic crystals NaBrO 3 and NaCIO 3 in depolarized right‐angle scattering (65‐145 cm −1 ) and unpolarized backscattering (55‐200 cm −1…
Abstract The characteristic parameters for three different equation‐of‐state (EOS) theories have been determined for polystyrene and low‐molecular weight polyisoprene using pressure‐volume‐temperature ( PVT ) data. Basically two procedures for the calculation of characteristic parameters were applied. The characterist…
Abstract Glycolysis of poly(ethylene terephthalate) with bisphenol A at high temperature (190°C–230°C) was carried out in an autoclave reactor. Kinetic study on depolymerization of glycolysis was conducted. The reaction temperature and the ratio of bisphenol A to poly(ethylene terephthalate) played the key roles on th…
Leaching of oxytetracycline, oxolinic acid, amoxycillin and the potentiated sulphonamide trimethoprim/ sulphamethoxazote (TMP/SMX) from surface-coated fish-feed pellets, surrounded with either cod liver oil or with calcium-alginate, was investigated. Despite the low water temperature (12°C), losses of amoxycillin, oxy…
Abstract Crystallization of polytetrafluoroethylene (PTFE) from the melt state has been studied by wide angle X‐ray scattering (WAXS), small angle X‐ray scattering (SAXS) and differential scanning calorimetry (DSC) experiments, supported by scanning electron microscopy (SEM) observations. Isothermal crystallization of…
To determine whether collagen solubilized from tendons can regenerate the most relevant characteristics of the tendon supraorganization was the aim of the present study. Extracted and purified collagen in acetic acid solutions subjected to precipitation and extensive dialysis was found to produce gels with rheological…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNear-Infrared Luminescence Spectroscopy of Cobaltocene Doped into Single Crystals of RuthenoceneMartin J. Davis and Christian ReberCite this: Inorg. Chem. 1995, 34, 18, 4585–4590Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published in…
A new procedure for quantitative phase analysis using the whole-powder-pattern decomposition method is proposed. The procedure consists of two steps. In the first, the whole powder patterns of single-component materials are decomposed separately. The refined parameters of integrated intensity, unit cell and profile sh…
The rates of the phase relaxations due to the Raman scattering of phonons and the interaction of the optical center with flipping two-level systems (TLS) have been calculated for the $^{5}$${\mathit{D}}_{0}$${\mathrm{\ensuremath{-}}}^{7}$${\mathit{F}}_{0}$ line of the ${\mathrm{Eu}}^{3+}$ and ${\mathrm{Sm}}^{2+}$ ions…
High-q-resolution diffraction experiments performed with 100 keV synchrotron radiation on the identical ${\mathrm{SrTiO}}_{3}$ crystal used in neutron and x-ray-scattering experiments before, unambiguously show that the bulk critical scattering above ${\mathit{T}}_{\mathit{c}}$=99.5 K does not exhibit a sharp componen…
Abstract The Cr(III) porphyrin complexes [Cr(tpp)(Cl)(H2O)] (1) and [(Cr(tpp)(Cl)(py)] (2) (tpp represents the dianion of 5,10,15,20-tetraphenylporphine) crystallized from a chloroform–toluene mixture in the tetragonal space group I4, Z = 2, a = 13.559(5), b = 13.559(5), c = 9.770(3) Å, V = 1796(3) Å3, and from a dich…
Some experimental evidences of the critical slowing down of low- and infralow-frequency (LF, ILF) relaxation of electric polarization caused by the motion of domain walls in polar phase and of interfaces in phase transition vicinities are under consideration. The critical slowing-down that appears in decreasing of rel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConfigurational Isomerism in Bis(N-alkylsalicylaldiminato)nickel(II) Complexes: The Equilibrium Planar .dblharw. Tetrahedral and Its Effect on the Kinetics and Mechanism of Ligand SubstitutionRainer Knoch, Horst Elias, and Helmut PaulusCite this: Inorg. Chem. 1995, 34, 16, 4…
A new aspect of the special corrosion behavior of duplex stainless steels (DSS) in acid solutions was investigated. Combined examination of the current oscillations observed in the potential range of the active-to-passive transition, together with metallographic examination of the surface morphology of the exposed mat…