Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The authors have discovered multipoles of even order to about 10 in the multipole moments characterising angular distributions of convoy electrons ejected by swift ions during penetration of thin solids. They suggest the strongly transverse distributions observed reflect electron loss from excited n, l states inside t…
Glycerol inhibits the in vitro self-association of monomeric collagen into fibrils and induces the dissociation of fibrils preassembled from NaBH4-reduced collagen. These effects were investigated in an effort to understand the mechanism of fibril assembly of the protein. In PS buffer (0.03 M NaPi and 0.1 M NaCl, pH 7…
Mineralization of bone matrix may be influenced by the presence of specific, noncollagenous bone proteins. The quantitative influence of two bone-specific proteins--bone gamma-carboxyglutamic acid (Gla) protein and osteonectin--and other proteins that decreased the rate of crystal growth was measured by adding seed cr…
The density-functional theory of freezing is extended to investigate the crystallization of binary hard-sphere mixtures. As the ratio of diameters $\ensuremath{\alpha}=\frac{{\ensuremath{\alpha}}_{1}}{{\ensuremath{\alpha}}_{2}}$ is lowered, the fluid-solid phase diagram for disordered alloys evolves from a spindle sha…
The red luminescence band that occurs in brown diamonds, where the yellow luminescence band originated at 2.721 eV is also present, is excited by light of 450-550 nm, corresponding to an absorption band present in these diamonds. It is a very structured band, up to 12 zero-phonon lines being identified in a 114 meV in…
The density functional theory is applied to the freezing of the hard-sphere fluid into a dense-random-packed glass configuration. It is shown that the relative thermodynamic stability of the fluid, glass and crystal phases is completely determined by only two structural features: the number of nearest neighbours and t…
Optical properties of thin liquid crystal cells are found to deviate significantly from those of thick cells. Results on the liquid crystal thickness dependent phase retardation, effective birefringence, and decay time of thin E-7 cells are presented. A simple model which is based on the partially disordered surface l…
Several theoretical concepts such as two-phonon bound states, off-center ions, and Fermi resonances have been suggested to explain the strong anomalies in the phonon spectra of copper halides, with no conclusive results. We take into account the anharmonic coupling of the $TO(\ensuremath{\Gamma})$ phonons with the two…
Depth profiles of the magnetization of sputtered films of Fe3O4 and its oxidized form, γ-Fe2O3, were obtained by the new polarized neutron reflection technique. We find that the magnetization of Fe3O4 is constant throughout the thickness (2600 Å) of the film except for a surface region about 25 Å deep corresponding to…
<div class="htmlview paragraph">Major plastics material utilisation in motor vehicle applications has been concentrated in relatively non-critical performance areas. These areas particularly interior trim parts are now almost saturated offering scope only for interplastic substitution.</div> <div class=…
The authors determine the self-inductance of a non-ferromagnetic metallic ring (of order 10 -8 H) to an accuracy of about 10%. The method is based on measuring the phase difference between induced EMF and induced current in the ring when the ring is exposed to an alternating magnetic flux. Both the theory and measurem…
Abstract AUSTEMPERED DUCTILE IRON has high strength with excellent toughness and ductility. Its strength is twice that of conventional ductile irons, comparable to heat-treated wrought steels. Composition is balanced to provide foundry compatibility, minimal segregation and good response to austempering. This datashee…
Hexagonal arrays of secondary grain-boundary dislocations have been observed in several near-Σ3 coherent twin boundaries in polycrystalline specimens of a f.c.c. Cu + 6 at.% Si alloy. The Burgers vectors of the dislocations in the networks have been determined and the steps associated with them are discussed.
A kinetic model of fuel/cladding chemical interaction (FCCI) has been developed. By fitting the model to in-pile experimental data, a wastage correlation has been derived that predicts corrosion depth due to FCCI. The model can explain the temperature dependency of the corrosion depth observed in the in-pile experimen…
Abstract The Raman spectra of the superionic conductors K 1.6 Mg 0.8 Ti 7.2 O 16 , Cs 1.2 Mg 0.6 Ti 7.4 O 1.6 , and (KTI) 1.6 Mg 0.8 Ti 7.2 O 16 are measured in the frequency range from 5 to 1000 cm −1 . In the range from 100 to 1000 cm −1 Raman spectra hardly show alkali ion dependence. On the contrary, in the freque…
Abstract Halogenfunktionelle Siloxane [(Me 3 C) 2 SiCl – OSiHalR 2 , Hal = F, R = CMe 3 ( 2 ), Hal = Cl, R = Ph ( 3 )] werden durch Reaktion der Dihalogensilane mit (Me 3 C) 2 Si(Cl)OLi ( 1a ) erhalten. Mit Ammoniak reagiert (Me 3 C) 2 Si(Cl)OH ( 1 ) glatt unter Bildung des Aminosilanols (Me 3 C) 2 Si(NH 2 )OH ( 4 ),…
The relationship between iodine concentration, osmolality, and toxicity for nine different contrast media was studied. High osmolal conventional ionic contrast media (Na-metrizoate, Na-iothalamate, meglumine/Na-diatrizoate, meglumine-calcium-metrizoate) and the new low osmolal nonionic (Metrizamide, iopamidol, iohexol…
An analog of Fano's theorem for ionization in cavities is shown to hold for the stepwise representation of electron paths used in Monte Carlo computer models of electron transport. This brings to light an error in the distribution of electron paths and hence energy deposition which is induced by interrupting steps whi…
The existence of phase transition in BaSm 2 Mn 2 O 7 was revealed by high temperature X-ray diffractometry to be near 520 K. The phase transition is largely affected by the oxygen nonstoichiometry of this compound. For stoichiometric composition this phase has an orthorhombic distortion due to Jahn-Teller effect of Mn…
The objectives of this paper are: 1. to up-date the manual search system and index book described in 1936 and 1938; 2. to introduce a “work form” which serves to guide the analyst through the procedural steps involved in using the manual search index book and 3. to review briefly the literature on manual search/match…