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 variation of the resistivity with thickness d and bulk electron mean free path lambda infinity of thin metal films with unlike surfaces is calculated using Soffer's angularly dependent surface scattering model (1967). Tabular values for the resistivity enhancement due to a range of surface roughness combinations a…
A spectroscopic survey of a large number of natural brown and yellow diamonds shows that the H3 centre (a vacancy plus an A-aggregate of nitrogen) is observed in absorption quite frequently in brown diamonds and occasionally in yellow samples. The H4 centre (a vacancy plus a B-aggregate of nitrogen) occurs much less f…
Abstract The copolymerizations of 4(5)‐vinyl‐1,2,3‐triazole, 1‐ p ‐bromophenyl‐4‐vinyl‐1,2,3‐triazole and 2‐methyl‐5‐vinyltetrazole with styrene, methyl methacrylate and vinyl acetate have been examined and the corresponding copolymerization parameters r 1 , r 2 were evaluated. The reactivities Q of these monomers are…
The temperature dependences of the mean square fluctuation of the displacement of the lattice ions and of the local spectral density at the lattice ions sites in KH 2 PO 4 have been evaluated as a function of the ratio between the correlation length xi and the range of the proton-lattice ion interactions. A comparison…
Uniaxial compression of plates of brittle materials containing pre‐existing planar cracks oriented at certain angles with respect to the direction of overall compression has revealed that the relative frictional sliding of the faces of the pre‐existing cracks may produce, at their tips, tension cracks which deviate at…
Donor-donor and donor-acceptor dynamics in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{P}}_{5}{\mathrm{O}}_{14}:{{\mathrm{Nd}}_{x}}^{3+}$ are measured directly with a high-resolution, near-ir laser system. Time-resolved fluorescence line-narrowing measurements show an absence of rapid donor-donor transfer below 20 K and…
Ferrimagnetic oxides with hexagonal crystal structures (referred to as hexagonal ferrites) are characterized primarily by their foliate (leaf-like or platelet) structure and high anisotropy fields. These properties allow for the preparation of polycrystalline grain oriented magnetic compounds with controlled values of…
Abstract The absorption of pure chlorine into aqueous sodium carbonate solutions accompanied by the desorption of carbon dioxide was studied both theoretically and experimentally. The absorption rates of chlorine and the desorption rates of carbon dioxide were measured at 25°C using a baffled agitated vessel operated…
The electromagnetic equations of the motor are written, then transformed by the finite difference technique. Both the infinite extent of the secondary and the finite extent of the iron are taken into account by the partition method. Actual width of the iron and the secondary are considered. Most of the unknowns are el…
Article Phase Relations in the Beryllium-rich Section of the System Beryllium-Copper-Iron was published on August 1, 1982 in the journal International Journal of Materials Research (volume 73, issue 8).
Pit formation on iron was stimulated by chelating agents at lower concentrations: the effect was largest in EDTA followed by NTA, IDA, and G in this order. This is caused by the cathodic reduction rate of the passive film being stimulated in the presence of the chelating agent, and therefore the potential determined b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzupyrene. Thermal isomerization. Nitration by silver nitriteArthur G. Anderson Jr. and L. Glenn KaoCite this: J. Org. Chem. 1982, 47, 18, 3589Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://pubs.acs…
The melting of nascent superhigh-molecular-weight poly(ethylene oxide) (PEO) has been studied by means of differential scanning calorimetry (DSC). High values of the melting temperatures and enthalpies were established. The higher temperatures are explained by the presence of tie molecules in high concentration. The p…
The myelographic contrast agent, metrizamide, causes a temporary confusional state in many patients. Since metrizamide is a 2-deoxyglucose analogue, it was tested for inhibitory effects on glucose metabolism. The Michaelis constant (Km) of human brain hexokinase for glucose rose from 0.039 to 0.24 and 0.47 mM with fin…
Nuclear spin relaxation times are calculated for quadrupolar nuclei situated at the center of octahedral and tetrahedral molecules. Vibrational distortion of such a molecule generates an electric field gradient at the center, which does not average to zero when the molecule is in an excited state of a degenerate vibra…
The thermal decomposition and the glass transition temperature (T) of polyisobutylene (PIB) were studied with a differential scanning calorimeter (DSC). The undecomposed and the decomposed polymers were analyzed by gel permeation chromatography for molecular weight distributions and by DSC for changes in the thermal p…
The standard method for the calculation of nuclear weapon fallout radiation doses and dose rates in operational type studies for the last 20 yr has been the computer algorithm known as WSEG-10. WSEG-10 uses empirical functions rather than numerical analyses and computes fallout dose (rates) in seconds or less on moder…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrido(triphenylsilyl)tetracarbonyliron derivatives with phosphine ligandsG. Bellachioma and G. CardaciCite this: Inorg. Chem. 1982, 21, 8, 3232–3234Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://d…
Faujasite occurs with phillipsite in a palagonitized cinder cone in the southern half of section 16, R. ll E., T. 16 N., Halloran Spring Quadrangle, San Bernardino County, California. Faujasite forms water-clear, millimeter-sized octahedra, commonly twinned on the spinel law. Averaged electron microprobe analyses yiel…
Densitometric scans of electron micrographs of type I collagen segment long spacing crystallites stained with uranyl acetate or phosphotungstic acid and uranyl acetate have been correlated with computer-synthesized scans derived from the sequence of the alpha 1(I) and alpha 2 chains. Three models that differ in the lo…