Materials Literature
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A technique is described for the preparation of `single' crystals of BaTiO3. At room temperature the crystals are complexes of habit appropriate to cubic symmetry, but consisting of multiply-twinned tetragonal components with orientation very sensitive to externally applied pressure or electric fields. Optical and X-r…
Abstract An einem Rechenbeispiel wird gezeigt, wie sich Elektronenlinsen durch eine für Elektronen durchlässige ebene Metallfolie chromatisch korrigieren lassen. Die benachbarten Elektroden influenzieren auf der Folie negative Ladungen, die die langsameren Strahl-elektronen verhältnismäßig stark nach außen drängen und…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Thermal Decomposition of Isopropyl ChlorocarbonateArthur R. Choppin and Edgar L. CompereCite this: J. Am. Chem. Soc. 1948, 70, 11, 3797–3801Publication Date (Print):November 1, 1948Publication History Published online1 May 2002Published inissue 1 November 194…
(1948). 30—THE HEAT OF ABSORPTION OF WATER BY CELLULOSE. Journal of the Textile Institute Transactions: Vol. 39, No. 11, pp. T351-T367.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Vapor Pressures of Inorganic Substances. I. Beryllium1Robert B. Holden, Rudolph Speiser, and Herrick L. JohnstonCite this: J. Am. Chem. Soc. 1948, 70, 11, 3897–3899Publication Date (Print):November 1, 1948Publication History Published online1 May 2002Published inissue 1…
Tharty-second Guthrzc Lecture, delzvwed ow 4 %ne 1948N choosing a subject for the Guthrie Lecture it seems important to consider.the use to which such a lecture can be put.There is so much published now
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganosilicon Polymers. IV. Infrared Studies on Cyclic Disubstituted Siloxanes1C. W. Young, P. C. Servais, C. C. Currie, and M. J. HunterCite this: J. Am. Chem. Soc. 1948, 70, 11, 3758–3764Publication Date (Print):November 1, 1948Publication History Published online1 May 200…
The vapor pressures of six alkali halides, NaBr, NaI, KI, CsCl, CsBr, and CsI, have been measured in the range from about 10−4-mm to 0.1-mm pressure. The measurements were made by the diffusion method, using an oxygen-coated tungsten filament as detector.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemorheology of Polysulfide RubbersMarcos Mochulsky and Arthur V. TobolskyCite this: Ind. Eng. Chem. 1948, 40, 11, 2155–2163Publication Date (Print):November 1, 1948Publication History Published online1 May 2002Published inissue 1 November 1948https://pubs.acs.org/doi/10.10…
This is the first in a series of papers to be issued by the Quartermaster Corps discussing the importance of fabric geometry in the development of more utilitarian and serviceable textile materials. It is a literature review which shows the relationship between the structural char acteristics of fabrics and various fu…
When a direct current bias is applied to a multicrystalline barium titanate ceramic, an alternating voltage can excite resonances in the ceramic. Four modes of motion have been excited---a longitudinal mode at right angles to the applied field, a radial mode of a circular plate at right angles to the applied field, a…
1. The structure of the collagen fibrils of normal human skin corium has been investigated with the electron microscope. 2. Under the conditions of observation the fibrils ranged in width from about 700 to 1,400 A with 1,000 A as the value occurring most frequently. They showed little tendency to fray longitudinally a…
Abstract Observations on pure cultures of diatoms and the results of centrifuge experiments showed that under optimal conditions the vegetative cells have the same specific gravity as sea water. The specific gravity of resting spores is significantly higher than that of sea water. Hence the specific gravity of the cel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSome Systems of Carbon Halides with Dioxane, Pyridine and CyclohexaneS. M. Scholastica Kennard and P. A. McCuskerCite this: J. Am. Chem. Soc. 1948, 70, 10, 3375–3377Publication Date (Print):October 1, 1948Publication History Published online1 May 2002Published inissue 1 Octo…
The coefficients of cubical expansion of 10 tannages of leather and tendon collagen have been measured by using water as the confinin g liquid. The results, calculated for dry leather of density 1.560 g/ml, show t hat an average coefficient of 540 X 10-6;00 applies for collagen and all leathers except chrome-vegetable…
Abstract It has been demonstrated that the adhesion of high polymers to cellulose is a function of tack temperatures and dielectric constants, ϵ, of the polymers and of dipole moments, μ, of polar groups. A plot of tack temperature versus mirror image force , μ 1 μ 2 /,of copolymers gives an area of adhesion bounded b…
Studies have been made of an alloy 88 percent Mn-12 percent Cu. This alloy when annealed at 925°C and quenched to room temperature has a tetragonal structure of axial ratio 0.97. It has been suggested that such a structure would show twinning along the 101 and 011 planes. Verification of this suggestion is presented.
Abstract The relaxation of stress in polyisobutylene whole polymer of different average molecular weights has been investigated over the temperature range 30–100°C., and at different elongations. The shape of the relaxation curve is independent of elongation in a range of low elongations; above this range there is a g…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrosion of Metals in Red Fuming Nitric Acid and in Mixed AcidNathan Kaplan and Rodney J. AndrusCite this: Ind. Eng. Chem. 1948, 40, 10, 1946–1947Publication Date (Print):October 1, 1948Publication History Published online1 May 2002Published inissue 1 October 1948https://do…
When impact occurs between clean metal surfaces, plastic flow of the metal usually takes place at the points of real contact, so that the pressures developed are as high as the dynamic yield pressure of the metal concerned. Early experiment show that if the surfaces are covered with a thin film of a highly viscous liq…