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。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilk-Like Fiber K-6 (Chinon)S. MorimotoCite this: Ind. Eng. Chem. 1970, 62, 3, 23–32Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/10.1021/ie50723a006https://doi.org/10.1021/ie50723a0…
Transmission electron microscopy has been used to characterize the microstructure of polycrystalline molybdenum irradiated at elevated temperatures (> 0·3T m). Irradiation at 700°c produces dislocation loops within the grains and denuded zones along grain boundaries, while irradiation at 1000°c results in generally lo…
The ND1 centre is produced in natural and synthetic diamond by primary radiation damage, but only occurs in strength when substantial concentrations of nitrogen are present in the lattice. The optical absorption associated with this centre consists of a sharp no-phonon line at 3.149 ev (80 degrees K) and phonon-assist…
Abstract The “cuticle,” which revests the starfish tube foot, has been studied by electron microscopy and the findings correlated with histochemical observations. The “cuticle” is composed by two distinct zones; an outer zone including numerous microvilli, which extend from the inner zone into and through a fibrillar…
A simple model is presented for studying the impact between a rigid sphere and a thin layer of relatively soft material supported on a rigid substrate. By assuming that the major loss of energy during impact is due to the plastic deformation of the layer, an approximate analysis is made for computing the energy loss f…
Sharp-line luminescence has been observed for ${\mathrm{Re}}^{4+}$ ($5{d}^{3}$) in single crystals of ${\mathrm{Cs}}_{2}$Zr${\mathrm{Cl}}_{6}$ and ${\mathrm{Cs}}_{2}$Hf${\mathrm{Cl}}_{6}$ at low temperature. Well-resolved vibronic structure is seen, forming nearly perfect mirror symmetry between emission and absorptio…
We present a study of the optical absorption spectrum of ErCrO3 as a function of temperature and magnetic field. Three types of processes are observed: (1) creation of a Cr+3 R-line exciton, (2) excitation of the Kramers-split Er+3 single-ion states, and (3) the simultaneous excitation of a Cr+3 exciton and a spin-fli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoessbauer spectra of tin complexes of phthalocyanine and tetraarylporphinesMary O'Rourke and Brother Columba CurranCite this: J. Am. Chem. Soc. 1970, 92, 6, 1501–1505Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 Marc…
This paper describes the kinetics of the ceric ion-initiated graft co-polymerization of vinyl acetate-acrylonitrile to poly(vinyl alcohol). The graft copolymerization rate Rp was found to be first order with respect to the total concentration of the comonomer mixture [M], the concentration of vinyl alcohol repeating u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFlame—Retarding Textile FibersR. C. NametzCite this: Ind. Eng. Chem. 1970, 62, 3, 41–53Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://doi.org/10.1021/ie50723a008Request reuse permissionsArticle Views4…
The trace element contaminations, introduced by grinding or sieving samples of Specpure silica and calcium carbonate in various devices in common usage, have been measured using emission spectrometry. The tungsten carbide vial introduced large amounts of Co and Ti. The alumina mortar introduced Al, Cr, Fe, Ga, and Zr.…
Residual resistivity at 4 K has been studied as a function of grain boundary area per unit volume in aluminium of two differing purities. A positive correlation between residual resistivity and boundary area was observed above a minimum boundary area per unit volume. The resistivity attributable to the presence of gra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation between porphyrins and metal ionsB. F. Burnham and J. J. ZuckermanCite this: J. Am. Chem. Soc. 1970, 92, 6, 1547–1550Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 March 1970https://pubs.acs.org/doi/1…
The last decade has featured major advancesin the technology and chemistry of urethane rigidfoams. Facile processing characteristics combined with unique physical properties-some still not yetfully explored-continue to create novel applica-tions, the latest being their use for the manufacture of chair shells (1). The…
Specimen contamination during electron-optical examination has been studied using “holey’ carbon-film specimens in a modified electron microscope. The composition of the residual gas atmosphere was determined by mass-spectrometric analysis. The gas pressure in the vicinity of the specimen was reduced to between 10−5 a…
Abstract Paramagnetic species produced in polycarbonate (PC) by γ‐ or ultraviolet irradiation were investigated by ESR. In γ‐irradiation, scissions of carbonate groups in the main chain occur. ESR spectra ( g = 2.003 4 ) composed of a sharp singlet, some broad singlets, and a small signal with hyperfine structure are…
The optical constants of the Eu chalcogenides between 1 and 6 eV have been obtained by means of a reflection technique for single crystals and transmission measurements for evaporated thin films. The films have been cooled below the magnetic transition temperature and the transmission was measured with linearly and ci…
GdN is shown to be ferromagnetic but small amounts of oxygen (GdN1−xOx with x≈0.05) cause paramagnetism and short-range antiferromagnetic order to set in. We attribute this to nearest-neighbor interactions having opposite sign.
The limiting oxygen index (LOI) technique provides a quantitative measure of reduced ftammability for fabrics over broad ranges of chemical treatment. Several conventional flame-retardant finishes for cellulosics gave linear LOI relationships with phosphorus content when compared at fixed nitrogen/phosphorus ratios. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBistriphenylsilyl chromate. Oxidation of olefins and use in ethylene polymerizationLeonard Morton Baker and Wayne L. CarrickCite this: J. Org. Chem. 1970, 35, 3, 774–776Publication Date (Print):March 1, 1970Publication History Published online1 May 2002Published inissue 1 Ma…