Materials Literature
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Abstract 1. Cyanoethylation of trichlorosilane was found to be catalysed by organic bases, benzoylperoxide, or platinized asbestos at about 160°C. The catalytic activities of organic bases increased in the order, dimethylaniline << quinoline < pyridine, piperidine < triethyl-amine. Pyridine…
Abstract Nach einer kurzen Schilderung der experimentallen Befunde, die zur Existenz von Wasserstoffbindungen zwischen Polyamidmolekülen und zu Einzelheiten der Kristall Struktur dieser Substanzen, führen, werden Ergebnisse über den Zusammenhang zwischen Festigkeit und Kristallinitätsgrad mitgeteilt. Ferenhin wird anh…
A new experimental technique is described for measuring scintillation decay times in the millimicrosecond region. The method developed uses the fact that a pulsed current, as delivered by the photomultiplier scintillation counter produces a far greater power dissipation in a resistive load than does the same mean stea…
Abstract The chemical engineer frequently has to correlate kinetic data for heterogeneous reactions simply and accurately in order to make useful predictions of reaction rates over a range of conditions. The Langmuir‐Hinshelwood approach, which is frequently used for this purpose, does not have the theoretical validit…
Abstract Attempts have been made, particularly by American workers, to exploit differences in crystalline and amorphous polymer spectra to determine crystalline/amorphous ratios. In most published work authors have been forced to rely on calibration by other methods, especially density. They have justified the use of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroscopic Examination of Modified StarchesT. J. Schoch and E. C. MaywaldCite this: Anal. Chem. 1956, 28, 3, 382–387Publication Date (Print):March 1, 1956Publication History Published online1 May 2002Published inissue 1 March 1956https://doi.org/10.1021/ac60111a027RIGHTS &…
Abstract Eine qualitative Überlegung zeigt, daß sich bei genügend klein gewählter Konzentration einer Polymerlösung die bei konzentrierteren Lösungen nach Zusatz eines Vernetzungsreagenses zu beobachtende Gelbildung unterdrücken läßt. In diesem Falle fällt eine durch das Vernetzungsreagens bewirkte Verknüpfung von in…
The elastic constants of thirteen glasses were measured by a dynamic method at elevated temperatures. Both Young's modulus and the shear modulus were determined and from these Pois‐son's ratio was calculated as a function of temperature. Fused silica, Vycor‐brand glass, and Pyrex‐brand glass had positive temperature c…
El autor presenta el Sistema Rotomixair, empleado para la distribución del aire en los secaderos de cámaras. Consiste en un conjunto de ventiladores de unas características especiales, móviles, que se pueden desplazar dentro de la cámara. El secado es rápido.
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El empleo de isótopos permite estudiar perfectamente el desplazamiento de los materiales a lo largo del horno. en otros aspectos referentes a la influencia de diversos factores sobre el funcionamiento del horno y sobre el proceso de cocción, se llega a la misma conclusión que mediante los métodos clásicos de investiga…
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Nuevo procedimiento ruso para la alimentación de crudos por ambos extremos del horno rotatorio.
Fundamentos y características tanto de construcción como de funcionamiento del nuevo sistema de tamizado.