Polycylic systems. Part VI. 8-meso-α-Naphthanthr-10-one and 2 : 3-8 : 9-dibenzoperylene
E. A. Braude, J. S. Fawcett and A. A. Webb, J. Chem. Soc., 1954, 1049 DOI: 10.1039/JR9540001049
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Phosphoric Acid Anodizing of Aluminium and its Application to Electroplating
SynopsisThe results are presented of a quantitative study of the phosphoric acid anodizing of high purity aluminium. The effects of electrolyte concentration, temperature, anodizing time, current density and air agitation on the coating weight, metal loss, coating ratio and density of the anodic coating were investiga…
The production of active solids by thermal decomposition. Part IV. Vermiculite
S. J. Gregg and R. K. Packer, J. Chem. Soc., 1954, 3887 DOI: 10.1039/JR9540003887
A Note on a Theory of the Uniaxial Ferromagnetic Anisotropy Induced by Cold Work or by Magnetic Annealing in Cubic Solid Solutions
In order to explain the origin of the uniaxial ferromagnetic anisotropy induced by cold work or by magnetic annealing in cubic solid solutions, the anisotropy energy caused by an anisotropic distribution of solute atoms produced by cold work or magnetic annealing has been calculated using the same model as in Van Vlec…
The preparation of polyamides containing heterocyclic groups from furfural and levulinic acid
Abstract New fiber‐forming polyamides containing heterocyclic groups were prepared form furan 2,5‐dipropionic acid and the corresponding tetrahydrofuran compound which were found to be prepared easily from furfural and levulinic acid. For example, poly‐decamethylenetetrahydrofuran 2,5‐dipropionamide (intrinsic viscosi…
The Crystal Structure of Stromeyerite, AgCuS: A Possible Defect Structure
Article The Crystal Structure of Stromeyerite, AgCuS: A Possible Defect Structure was published on December 1, 1954 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 106, issue 1-6).
Solutions of metal soaps in organic solvents. Part IV. Direct-current conductivity in solutions of some metal oleates in toluene
S. M. Nelson and R. C. Pink, J. Chem. Soc., 1954, 4412 DOI: 10.1039/JR9540004412
Field Emission Current-Density Distribution
A quantitative measurement of the current-density distribution over the surface of monocrystalline tungsten field emitters is obtained by densitometric analysis of calibrated photographic negatives of emission patterns observed with a modified Mueller projection tube. Analysis of distributions thus obtained permits an…
Lanthanum Oxychloride Phosphors
Lanthanum oxychloride can be activated to show strong fluorescence under excitation by cathode rays. Bismuth as an activator gives a blue emission extending into the ultraviolet with the peak at 3580 Å; antimony a greenish white with the peak at 4960 Å, and samarium a reddish orange emission composed of a series of li…
Intensity Anomalies in Electron Diffraction Patterns of CuO
The oxide layer, giving the so‐called electron diffraction pattern and formed by heating copper in air at 600°C, has been examined by high‐resolution electron diffraction and electron microscopy. It is shown that the intensity anomalies which differentiate the pattern from the normal pattern are not due to impurities…
The Reaction of Nitrogen with, and the Diffusion of Nitrogen in, Beta Zirconium
The rate of reaction of nitrogen with high‐purity zirconium was determined for the temperature range of 975° to 1640°C at 1 atm pressure. The reaction followed a parabolic law and the parabolic rate constant in (ml/cm 2 ) 2 /sec was calculated to be where 48,000 ± 1500 cal/mole is the activation energy for the reactio…
Physico-Chemical Studies on the Skin and Leather of Marine Animals-XII
Aiming to obtain an interpretation of the cause for variance in behaviours between fish skin and terrestial animal hide, the relation between hydroxyproline content in the collagen and shrinkage temperatur (Ts) of different animal skins was determined. As a result, it has proved that there was a direct proportion betw…
The crystal structure of the acid salts of some monobasic acids. Part III. Potassium hydrogen dibenzoate
J. M. Skinner, G. M. D. Stewart and J. C. Speakman, J. Chem. Soc., 1954, 180 DOI: 10.1039/JR9540000180
Sur le rôle de la valence des cations échangeables dans la montmorillonite
Les charges négatives d'un minéral argileux ne peuvent être neutralisées localement que par des cations monovalents. La saturation du minéral par des cations bi ou polyvalents crée nécessairement des défauts de neutralisation locale. On peut relier à cette circonstance la grande stabilité des états solvatés d'une argi…
Thermodynamics of crystallization in high polymers. Cellulose trinitrate
Abstract Melting temperatures of cellulose trinitrate (13.96% N) in mixtures with γ‐butyrolactone have been determined dilatometrically, and also by an optical method depending on depolarization of polarized light when transmitted through a semicrystalline sample. Results obtained by these two methods, and also by dir…
High Temperature Crystal Structure of Thorium
High temperature x‐ray diffraction patterns and electrical resistivity measurements show that thorium of 99.8% purity transforms from face‐centered cubic to body‐centered cubic on heating to 1400 ± 25° C. At 1450° C the lattice constant of body‐centered cubic thorium is 4.11 ± 0.01 Å. The extrapolated lattice constant…
The anodic oxidation of metals at very low current density. Part VI. Tin
S. E. S. El Wakkad, A. M. S. El Din and J. A. El Sayed, J. Chem. Soc., 1954, 3103 DOI: 10.1039/JR9540003103
Mixed liquid crystals
J. S. Dave and M. J. S. Dewar, J. Chem. Soc., 1954, 4616 DOI: 10.1039/JR9540004616
Conjugated macrocycles. Part XXV. Cross-conjugated macrocycles with inner great rings of 16, 20, and 24 atoms
P. F. Clark, J. A. Elvidge and R. P. Linstead, J. Chem. Soc., 1954, 2490 DOI: 10.1039/JR9540002490
Paracyanogen: its formation and properties. Part I
L. L. Bircumshaw, F. M. Tayler and D. H. Whiffen, J. Chem. Soc., 1954, 931 DOI: 10.1039/JR9540000931