Materials Literature
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Dechant's method for determining the total accessibility of cellulose by exchange with deuterium oxide was modified for routine use with cotton fibers. Deuterated cotton was allowed to re-exchange with water or aqueous sodium hydroxide solution and the deuterium oxide content of the liquid used for re-exchange was det…
The classical theory for mass defects in crystals is inapplicable to quantum crystals, where zero-point motion leads to a force-constant renormalization on the introduction of mass defects. We develop a variational theory for handling such problems which simplifies the renormalization so that the problem reduces to th…
Abstract The glass transition temperature T g of partially sulfonated polystyrene has been measured dilatometrically as a function of degree of sulfonation. A semitheoretical relationship between T g and degree of sulfonation has been derived by treating the strong‐acid polymer as a highly polar copolymer of styrene a…
Abstract The emission spectra of several fragmental species, especially of hydrogen atoms, produced by the electron impact (energy:240 eV) of gaseous methanol and deuteromethanols have been investigated. The intensity ratios of the Balmer-β lines of the H and D atoms are ca. 2.9:1 for CH3OD and ca. 1:1.8 for CD3OH, in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleElectron Microscopy of Poly(vinyl chlorides) and Ethylene-Vinyl Acetate Rubber SystemsY. Jyo, C. Nozaki, and M. MatsuoCite this: Macromolecules 1971, 4, 4, 517–518Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July 1971http…
Growth of anodic oxide on Al has been studied for porous and nonporous films using the galvanostatic technique. Measurements have been made in 0.1M solutions of H3PO4, Na2HPO4, Na3PO4, and Na2CO3. The high field approximation holds for all results. Evidence is given in support of the Verwey model. The parameters of ox…
The application of explosion-bonded aluminum-to-steel welding transition joints on marine vessels is discussed. Evaluation of this material's suitability for joining aluminum superstructures to steel decks is reviewed in detail. Galvanic corrosion is demonstrated to be negligible, thereby providing significant savings…
Within 5 to 10 min at 37 C, bacteria infected by bacteriophage phiX174 acquire the ability to exclude superinfecting phiX particles from reproducing themselves. The superinfecting phage are blocked at a stage prior to synthesis of the parental replicative form molecule; the superinfecting deoxyribonucleic acid remains…
Abstract The slip line pattern of molybdenum single crystals deformed in tension at temperatures between 293 and 573 °K ( T / T m = 0.1 to 0.2) was systematically investigated using optical and electron microscopy. The transition from parabolic stress‐strain behaviour to three‐stage hardening which occurs in a transit…
Uniaxial stress dependence of the low-temperature thermal conductivity of lightly-doped p -type Ge and Si is calculated in detail by taking account of elastic and inelastic phonon scattering by holes bound to acceptor impurities. The stress modifies the temperature dependence as well as the magnitude of the thermal co…
Abstract New developments in the image reconstruction procedures for electron microscopy proposed by us are reported here. Reconstruction procedures with visible light for complex functions are described. In one variant of the procedure bright field micrographs for various tilting of the primary beam are combined. It…
Atomic lifetimes have been measured for the series 3 snf 3 F perturbed by 3 p 3 d 3 F in Al II and for the series 2 snd 1 D perturbed by 2 p 21 D in Be I by the beam-foil technique. The experimental results are compared with theoretical data based upon configuration interaction calculations, and discrepancies are disc…
Abstract A concerted study of poly(vinyl chloride), chlorinated poly(vinyl chloride), and poly(vinylidene chloride) polymers by spectroscopy, thermal analysis, and pyrolysis‐gas chromatography resulted in a proposed mechanism for their thermal degradation. Polymer structure with respect to total chlorine content and p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structures of thiocyanatopentacyanocobaltate(III) and related complexesHarry B. Gray and Diane F. GuttermanCite this: J. Am. Chem. Soc. 1971, 93, 14, 3364–3371Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 Ju…
A linear relation is established between the cosine of the contact angle and the temperature of a liquid metal sessile drop resting on a ceramic substrate. This relation is demonstrated for many liquid metal/ceramic systems. The work of adhesion and the effects of surface roughness, porosity, chemical reactions, and s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of hydridonitrosyltris(triphenylphosphine)iridium(I) perchlorate, [IrH(NO)(P(C6H5)3)3][ClO4]James A. Ibers and D. M. P. MingosCite this: Inorg. Chem. 1971, 10, 7, 1479–1486Publication Date (Print):July 1, 1971Publication History Published onli…
The contributions of inelastic and elastic phonon scattering by neutral donors to the low-temperature thermal resistance of Ge are calculated in detail. It is shown that the inelastic and elastic scattering mechanisms make almost the same contribution to the thermal resistance in Sb-doped Ge. The sum of the both contr…
Abstract The variations in flow stress of FeCo : 2 at% V as a function of test or quench temperature exhibit a maximum near the critical temperature for ordering, T c . Transmission microscope study of thin foils reveals the existence of paired dislocations not only at temperatures below T c but also at temperatures…
The influence of a variety of water-insoluble monomolecular films on the evaporation rate of 50 to 500 μ diameter water drops was determined at 25C and 50% relative humidity. The results indicate that only linear polar molecules capable of close packing can form monomolecular films which inhibit the gas transport of w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of sodium oxide-4 magnesium oxide-15 aluminum oxide, a variant of .beta.-aluminaMax Bettman and Leslie L. TernerCite this: Inorg. Chem. 1971, 10, 7, 1442–1446Publication Date (Print):July 1, 1971Publication History Published online1 May 2002Published inissue 1 July…