Materials Literature
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The adsorption characteristics of phthalic acid on a silver surface were investigated by means of surface-enhanced Raman scattering (SERS). For a reliable analysis of the SER spectrum, we also performed an ab initio vibrational wavenumber calculation. The SER spectral features dictated that the phthalic acid molecules…
Our work demonstrates that magnetoresistance of the polycrystalline magnetite decreases with the reduction in average grain size, suggesting that the spin-dependent transporting phenomenon is associated with the interface microstructure. Also, the reducing peak intensity of the Raman spectra near 660 ${\mathrm{cm}}^{\…
A synchrotron X-ray diffraction study on hexagonal graphite-like boron nitride (h-BN) was performed under high pressures and temperatures. From the measured P-V-Trelation for h-BN (with a three-dimensional ordering parameter P3 = 0.9) in the temperature range from 298 to 1273 K and up to 6.7 GPa, the thermoelastic par…
Crystalline mullite was deposited by chemical vapor deposition (CVD) onto SiC/SiC composites overlaid with CVD SiC. Specimens were exposed to isothermal oxidation tests in high‐pressure air + H 2 O at 1200°C. Unprotected CVD SiC formed silica scales with a dense amorphous inner layer and a thick, porous, outer layer o…
Results are reported of a coordinated investigation of the dynamics of electronic excitations in LiB 3 O 5 and Li 2 B 4 O 7 crystals by low-temperature luminescence VUV spectroscopy performed with subnano-second resolution under synchrotron photoexcitation. Data on the photoluminescence (PL) decay kinetics, time-resol…
BACKGROUND: The main functional property of collagen is to provide a supporting framework to almost all tissues: the effects of non-enzymatic glycation on this protein are deleterious and in diabetes mellitus contribute to the mechanism of late complications. The aim of this work is to provide evidence by scanning for…
Os processos de gelatinização e de extrusão de amido de milho foram estudados. Calorimetria diferencial de varredura e miscroscopia óptica foram utilizadas na determinação da temperatura de gelatinização, T(G), em função do grau de umidade. Misturado a plastificantes, o amido foi processado em extrusoras mono- e dupla…
EXAFS and Molecular Dynamics combined study of CaO − FeO − 2SiO2 glass. New insight into site significance in silicate glasses, S. Rossano, A. Ramos, J.-M. Delaye, S. Creux, A. Filipponi, Ch. Brouder, G. Calas
Treatment of 1-(hydroxydimethylsiloxy)pentamethylcyclotrisiloxane ( II ), a latent A 2 A‘B monomer, with a phosphazene P 4 - t -Bu superbase followed by quenching with vinyldimethylchlorosilane/triethylamine leads to a hyperbranched polysiloxane ( III ). The microstructure and properties of III are compared to those o…
An aminosilane functionalized isocyanurate of 1,6-hexamethylene diisocyanate (HDI isocyanurate) was used to formulate coatings. The coatings were formulated using a mixture of the silane-functionalized isocyanurate and the unfunctionalized HDI isocyanurate. The general coating properties and tensile properties were ev…
We introduce a potential model for MgCO3 and CdCO3 which reproduces experimental structural parameters and solution energies. We employed atomistic simulation techniques to model the absorption and segregation of magnesium and cadmium ions to the low-index surfaces of calcite. Both magnesium and cadmium ions absorb at…
Cotton Sirospun® yarn has a circular cross-sectional shape, with the two strands segregated and consolidated into an adjacent array. When it is untwisted, the strand twists in an alternate direction. When compared to single yam with the same linear density and twist multiplier, cotton Sirospun yam is superior in tenac…
Nonphosphorylating nicotinamide adenine dinucleotide (phosphate)- [NAD(P)-] dependent aldehyde dehydrogenases share a number of conserved amino acid residues, several of which are directly implicated in catalysis. In the present study, the role of Glu-268 from nonphosphorylating glyceraldehyde-3-phosphate dehydrogenas…
N, N, N -Tris[ p -( N -oxyl- tert -butylamino)phenyl]amine ( N ) was obtained as dark violet plates by lithiation of tris(4-bromophenyl)amine, followed by reaction with 2-methyl-2-nitrosopropane and oxidation of the resulting tris(hydroxyamine) with Ag 2 O. An X-ray crystal and molecular structure analysis of the mono…
Anisotropic wood flour (WF) particles, composed of fiber bundles, were melt compounded in a twin screw extruder at 200°C together with poly(propylene) (PP) in the presence of maleic anhydride-grafted poly(propylene) (PP-g-MA) and maleic anhydride-grafted poly-(styrene)-block-poly(ethene-co-1-butene)-block-poly(styrene…
Cold work accelerates stress corrosion cracking (SCC) growth rates in Alloy 600 (UNS N06600). However, the variation in crack growth rates generated from cold-worked material has been significant, and the effect has been difficult to quantify. A study was performed in hydrogenated water adjusted to pH 10.2 to evaluate…
Continuous casting of non-ferrous metals has been practised for well over 100 years. It has many advantages over static ingot and book mould casting, the most important being improved yield, reduced energy consumption and reduction of manpower, with a consequent reduction in cost. This book shows how the prrocess can…
The effect of the incorporation of Al-Tschermak’s molecule to the trioctahedral potassium mica annite {K}[Fe 3 ]<AlSi 3 >O 10 (OH) 2 on local and average structure has been investigated by hydrothermal synthesis, structure refinement of X-ray powder diffraction data, Mössbauer and infrared spectroscopy. The vari…
A series of π-conjugated polymers and copolymers containing 1,4-dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole (also known as 2,5-dihydro-3,6-diphenylpyrrolo[3,4-c]pyrrole-1,4-dione) (DPP) and 1,4-phenylene units in the main chain is described. The polymers are synthesised using the palladium-catalysed aryl-aryl coupling rea…
Solid structures consisting of layers of different materials created at elevated temperatures usually exhibit substantial residual stresses. These stresses are caused by intrinsic strains in addition to thermal strains, and originate from the bonding of the layers, which generates internal forces and moments that must…