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Abstract Research on the Raman spectrum shows that the features of the different phases of which semi‐crystalline polyethylene is composed can be obtained through bending vibrations of δ (CH 2 ).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic studies on monomeric and dimeric iron porphyrinsK. M. Kadish, L. A. Bottomley, J. G. Brace, and N. WinogradCite this: J. Am. Chem. Soc. 1980, 102, 13, 4341–4344Publication Date (Print):June 1, 1980Publication History Published online1 May 20…
Anodic oxide films formed on nickel in p H 7.65 borate buffer solution in both the passive potential and oxygen evolution regions have been analyzed by RHEED, Auger spectroscopy (in conjunction with argon ion sputtering), and O x‐ray emission spectroscopy. In the passive potential region, a highly epitaxed, single cry…
By means of nonlocal elasticity theory, the Griffith crack problem is solved to determine the state of stress in a plate weakened by a line crack. The maximum stress is found to be finite and occurs away from the crack tip. Cohesive stress is estimated and compared with the calculations based on atomic lattice theory.…
Abstract The intensity of the glass transition in semicrystalline polycarbonate was measured by differential scanning calorimetry and by thermally stimulated discharge of electrets. Solution‐cast and bulk‐crystallized samples possessing widely varying crystallinities and morphologies were investigated. It is shown tha…
Raman spectra of amorphous As x Se 1- x system (0≤ x ≤0.5) were measured and the spectra were interpreted with the molecular model of Lucovsky and Martin. In the Se-rich region the observed Raman spectra are well reproduced by the superposition of the Raman intensity of pure Se, As 2 Se 3 and As 2 Se 4 in proportion t…
The penetration of a thin plate from the side by a sharp rigid wedge is considered. A formula is proposed which expresses the external work done in terms of the depth of penetration and the wedge angle. The external work is decomposed into two parts: a part related to the length of cut plate and a part related to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron exchange kinetics of [Fe4S4(SR)4]2-/[Fe4S4(SR)4]3- and [Fe4Se4(SR)4]2-/[Fe4Se4(SR)4]3- systems. Estimates of the intrinsic self-exchange rate constant of 4-Fe sites in oxidized and reduced ferredoxinsJohn G. Reynolds, Catherine L. Coyle, and R. H. HolmCite this: J.…
Abstract X‐ray photoelectron spectroscopy (XPS) has been used to study the chemical modification of low density polyethylene, high density polyethylene and polypropylene using a very mild treatment with chromic‐sulphuric acid or treatment with concentrated sulphuric acid. The treatment of low density polyethylene with…
Polycrystalline Si films with average grain sizes of ∼8 μm have been grown by laser-induced chemical vapor deposition from SiCl4. A cw CO2 laser operated at 10.6 μm was used to provide local heating of quartz substrates in an otherwise cool reactor to initiate the endothermic decomposition reaction. Deposition rates o…
Anodic polarization studies have been conducted in an aqueous solution of , at 92°C, and compared with studies in . Anodic films were examined by electron diffraction and x‐ray energy analysis and all results compared with published data on and equilibria. In particular, it was concluded that the delay of passivity in…
Ruthenium(II) phthalocyanine complexes of the type RuPcL 2 (Pc = the phthalocyaninato dianion, L = various pyridines, imidazole, dimethylformamide, dimethylsulfoxide, and acetonitrile) may be prepared generally in solution by photolysis of RuPc(CO)L′ complexes in the presence of excess L (L′ may be the same as L or ma…
Abstract A small‐angle x‐ray scattering (SAXS) investigation of two linear segmented polyurethanes was carried out to learn about the respective domain structure (morphology). Both urethanes had a hard segment of methylene‐ bis (4)phenyl isocyanate (MDI) and butanediol. These two components comprised 28% by weight of…
A Prussian blue type compound of the stoichiometric composition Mn(CN)3⋅xH2O (x=0.57) is formed as the final product of hydrolysis of Na3[Mn(CN)6] in perchloric acid. IR and visible spectra as well as structural and magnetic data show that it is a mixed valence compound consisting of sixfold N-coordinated Mn(II) and s…
Abstract High resolution imaging by transmission electron microscopy has revealed a mechanism for the weathering of intermediate microcline in a humid, temperate climate. Dissolution of the feldspar begins at the boundary of twinned and untwinned domains and produces circular holes which enlarge to form negative cryst…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Yehiam Prior, "Three-dimensional phase matching in four-wave mixing," Appl. Opt. 19, 1741_1-1743 (1980) Export Citation BibTex Endnote (RIS) HTML Plain…
Absolute total electron scattering cross sections for ${\mathrm{N}}_{2}$ from 0.5 to 50 eV have been measured with an estimated uncertainty of \ifmmode\pm\else\textpm\fi{}3% using a transmission time-of-flight method previously described. The results are compared to previous experimental results and to recent calculat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDefining New Directions for Corrosion Research and DevelopmentHarris M. Burte and Charles T. LynchCite this: Ind. Eng. Chem. Prod. Res. Dev. 1980, 19, 2, 166–172Publication Date (Print):June 1, 1980Publication History Published online1 May 2002Published inissue 1 June 1980ht…
Brillouin scattering spectra of NaNO 2 were observed in the incommensurate (antiferroelectric) phase under a precise temperature regulation. In the temperature dependence curve of the Brillouin frequency shift concerned with a longitudinal acoustic mode propagating along the [010] direction, an anomaly was found at th…
Abstract The < 2 µ m fractions of two fluvio-glacial sediments from East Greenland have been analysed chemically and by XRD and Mössbauer spectroscopy. The bulk of each < 2 µ m fraction consists of feldspars and micas (biotite) which are important constituents of the Precambrian igneous and metamorphic rocks of…