Materials Literature
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The spin-wave dispersion relations in the ferromagnet MnSb, and the antiferromagnet CrSb, have been measured, by neutron inelastic scattering, along high-symmetry directions in reciprocal space, as a function of temperature. The effect of composition is discussed. The dispersion in CrSb is found to rise very steeply a…
Abstract DSC measurements around the glass transition in the homologous series of seven poly( n ‐alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δ c p decreases linearly with the number of n ‐alkyl C‐atoms in the side chain. The usual glass step in the DSC…
Binary magnesium alloys containing chromium, manganese, or titanium were made using a physical vapour deposition technique. The corrosion resistance of the alloys was assessed in aqueous chloride solutions using total immersion tests in quiescent 600 mmol L−1 NaCI solutions. Alloying with manganese or titanium was fou…
The stimulated emission cross section σp for the 1060 nm transition of Nd3+ in lead borate and bismuth borate glasses has been determined from fluorescence measurements. The compositional dependence of σp, which has been evaluated using radiative transition probability, refractive index of the host glass, effective fl…
A (1012) twin boundary in deformed alpha-Ti has been observed by highresolution electron microscopy. The observations are in agreement with a model calculated using a many-body potential. A twinning dislocation is predicted by the topological theory and characterized directly in the experimental image with the circuit…
By using a 3-methoxy-4-hydroxy-benzaldehyde (MHBA) crystal as frequency doubler at room temperature, an efficient blue light output for near IR automatic tunable picosecond parametric laser is obtained, and blue-violet light output by frequency doubling of GaAlAs laser diode is also realized. A 404.5 nm light, with ou…
Inorganic materials can encapsulate organic dye molecules in a variety of ways. Those considered here are simple inorganic salts that have adsorbed, oriented, and overgrown dyes during growth from solution, which promise spectroscopic and photonic applications. The Figure shows KH 2 PO 4 crystals in which dyes carryin…
Abstract 1,4:3,6‐Dianhydrosorbitol (DAS) was used as chain extender in the preparation of new segmented polyurethane elastomers, based on polyoxytetramethylene or hydrogenated polybutadiene soft segments and 4,4′‐diphenylmethane diisocyanate (MDI). These materials exhibit a two‐phase microstructure, due to the thermod…
To address basic questions concerning proteins of the Sulfolobus acidocaldarius cell envelope, cell ghosts (empty cells consisting of cytoplasmic membrane complexed with the glycoprotein S-layer) were isolated and analyzed by standard biochemical methods. The constituent proteins included the two dissimilar subunits a…
The kinetics of curing tetraglycidyl 4,4′-diaminodiphenyl methane (TGDDM) or of the mixture TGDDM/diglycidylether of bisphenol A (DGEBA) by bis(m-aminophenyl)methylphosphine oxide (BAMPO) was studied using differential scanning calorimetry. At low advancement of curing (<50%), the low activation energy interaction bet…
A distributional method to solve the Einstein’s field equations for thin shells is formulated. The familiar field equations and jump conditions of Darmois-Israel formalism are derived. A careful analysis of the Bianchi identities shows that, for cases under consideration, they make sense as distributions and lead to j…
Silicate glasses of the composition (Li 2 O) x (SiO 2 ) 100−x ( x = 0, 20, 33.3, and 40) have been prepared and characterized by X‐ray and neutron diffraction experiments using the technique of isotopic substitution. Thus, at each composition, a set of independent diffraction patterns allows the discussion of the shor…
Abstract The polymerization of 2‐acetoxymethyl‐2‐alkyltrimethylene carbonates (alkyl = methyl: AMTC, alkyl = ethyl: AETC) and of 2‐methoxycarbonyl‐2‐methyltrimethylene carbonate (MMTC) in toluene with sec ‐butyllithium as initiator results in the respective polymer with yields between 78% and 88%. The analysis of the…
A simple digital method of measuring the performance of detectors in the scanning electron microscope (SEM) is described. The value derived is absolute and can therefore be used to compare both different detectors on the same instrument as well as different detectors on different instruments. The technique can be appl…
We present experimental photoemission and inverse photoemission spectra of SrTiO 3 − δ representing electron-doped d 0 systems. Photoemission spectra in the presence of electron doping exhibit prominent features arising from electron correlation effects, while the inverse photoemission spectra are dominated by spectra…
Differentiating chick limb-bud mesenchymal cells plated in micromass culture form a cartilage matrix that can be mineralized in the presence of 4 mM inorganic phosphate (Pi), and 1 mM calcium. Previous studies showed that when beta-glycerophosphate (beta GP) is used in place of Pi, the mineral crystals formed are larg…
Cuprous oxide ( Cu 2 O) films are prepared by simple thermal dry oxidation of sputtered Cu films at temperatures lower than 350° C. The relationship between growth rate of Cu 2 O film and oxidation temperature is formulated from both optical and Rutherford backscattering measurements, along with a similar relationship…
Bismuth oxide is an interesting dielectric material with potential applications for optical coatings. MIS capacitors, and microwave integrated circuits. CVD growth has a number of advantages over other deposition techniques, e.g., precise control of oxygen activity, microstructure, and texture. The study presented her…
Microbiology Society journals contain high-quality research papers and topical review articles. We are a not-for-profit publisher and we support and invest in the microbiology community, to the benefit of everyone. This supports our principal goal to develop, expand and strengthen the networks available to our members…
The scattering of an electromagnetic plane wave incident upon an inhomogeneous multilayer structure is considered in symbolic form. In this framework a scattering-matrix propagation algorithm that decouples recurrences for backward- and forward-scattered wave amplitudes is developed. By construction the scattering-mat…