Materials Literature
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The explanation of the variation of efficiency with concentration of activator in terms of a large center, given by Ewles, was oversimplified. The recent suggestion of Johnson and Williams that an activator can only function as a luminescent center if no other activator occupies any of lattice sites surrounding it, le…
A. M. Posner, Trans. Faraday Soc., 1953, 49, 382 DOI: 10.1039/TF9534900382
The ordinary and extraordinary Hall effects have been measured at room temperatures for the N-Cu series of alloys. The number of conduction electrons calculated from ${n}^{*}=\frac{1}{{R}_{0}\mathrm{Nec}}$ (where ${R}_{0}$ is the "ordinary" constant measured at high fields) agrees fairly well with the number of $4s$ e…
F. Challenger, E. A. Mason, E. C. Holdsworth and R. Emmott, J. Chem. Soc., 1953, 292 DOI: 10.1039/JR9530000292
The value of the saturation magnetization at absolute zero of BaO\ifmmode\cdot\else\textperiodcentered\fi{}6${\mathrm{Fe}}_{2}$${\mathrm{O}}_{3}$ and related compounds can be explained as due to noncompensated antiferromagnetism.The Bloch wall formation in small particles is discussed. One is led to the assumption tha…
The spin-wave theory in a modified form is applied to antiferromagnetism. The interaction between different modes of spin-waves, which is due to the higher order terms omitted in the customary spin-wave treatment, is taken into account in a self-consistent manner. It is shown that the interaction terms cause a change…
Thin films of gutta percha have been examined by means of electron diffraction, and shown to exist in three distinct crystalline forms, termed the α, β and γ modifications, whereas prior to this work only two forms had been recognized. The conditions necessary for the occurrrence of the different forms are considered…
This paper discusses investigations into the detailed changes in domain structure of ferromagnetic material under externally applied stress. The changes in the domain pattern of grain-oriented silicon steel with large grain size were observed and photographed while the specimen was stressed in tension.Experiments in w…
R. M. Dell, F. S. Stone and P. F. Tiley, Trans. Faraday Soc., 1953, 49, 201 DOI: 10.1039/TF9534900201
(1953). The importance of extracellular products of algae in freshwater. SIL Proceedings, 1922-2010: Vol. 12, No. 1, pp. 219-232.
Experimental observations are reported on the magnetic properties of thin evaporated films of nickel. The saturation magnetization follows the general prediction of Klein and Smith after somewhat arbitrary modifications on the basis of fitting the Weiss curve for bulk specimens, as suggested by Drigo. Qualitatively ob…
This paper is intended to supplement the review articles published by Stoner in 1948 and 1951, firstly by considering in greater detail the quantum-mechanical and statistical-mechanical foundations of the collective electron theory and secondly by considering briefly a wider range of relevant experimental results.In S…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Properties of Serum and Plasma Proteins. XXIX. Separation from Human Plasma of Polysaccharides, Peptides and Proteins of Low Molecular Weight. Crystallization of an Acid Glycoprotein1a,b,cK. SchmidCite this: J. Am. Chem. Soc. 1953, 75, 1, 60–68Publication Dat…
J. A. Elvidge, R. P. Linstead and J. F. Smith, J. Chem. Soc., 1953, 708 DOI: 10.1039/JR9530000708
R. J. Williams, J. Chem. Soc., 1953, 113 DOI: 10.1039/JR9530000113
G. M. Burnett and P. R. E. J. Cowley, Trans. Faraday Soc., 1953, 49, 1490 DOI: 10.1039/TF9534901490
Plankton samples of Tabellaria from all the lakes of the English Lake District have been examined and evidence of morphologically distinct populations has been found in samples from (a) a single lake at one time, (b) different lakes, and (c) a single lake at different times. Clone cultures have been used to study the…
The addition of calcium hydroxide to expansive clays results in beneficial reductions in the swelling characteristics and in increased resistance of the material to deformation under load. In this study, improvements in clay properties corresponded generally to the amount of calcium hydroxide addition. For two clays,…
D. R. Llewellyn, J. Chem. Soc., 1953, 28 DOI: 10.1039/JR9530000028
J. N. Agar, Trans. Faraday Soc., 1953, 49, 533 DOI: 10.1039/TF9534900533