347. Magnetic perturbation of singlet–triplet transitions. Part IV. Unsaturated compounds
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Precision Measurement of Absolute Specular Reflectance with Minimized Systematic Errors
Instruments for making precision measurements of the specular reflectance at essentially normal incidence in the near ultraviolet, visible, and infrared regions of the spectrum are described. The square of the absolute reflectance is measured, with a resultant increase in measuring precision, and the major sources of…
Surface Properties of the Quinoline-Insoluble Fraction of Coal-Tar Pitch.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Properties of the Quinoline-Insoluble Fraction of Coal-Tar Pitch.M. S. Morgan, W. H. Schlag, and M. H. WiltCite this: J. Chem. Eng. Data 1960, 5, 1, 81–84Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January…
921. Physical properties and chemical constitution. Part XXXI. Polymethylene dichlorides, dibromides, di-iodides, and dicyanides
R. Grzeskowiak, G. H. Jeffery and A. I. Vogel, J. Chem. Soc., 1960, 4728 DOI: 10.1039/JR9600004728
Ionic self-diffusion coefficients in molten sodium carbonate
S. Djordjevic and G. J. Hills, Trans. Faraday Soc., 1960, 56, 269 DOI: 10.1039/TF9605600269
871. Polyfluoroalkyl compounds of silicon. Part V. The reaction of trichlorosilane with chlorotrifluoroethylene, and halogen-abstraction by silyl radicals
R. N. Haszeldine and J. C. Young, J. Chem. Soc., 1960, 4503 DOI: 10.1039/JR9600004503
452. The synthesis and irradiation of polyborosiloxanes
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Degradation of Wood Cellulose and Cotton Linters in Phosphoric Acid
Kokoku Rayon and Pulp Co. Ltd., Research Division, 11 Shiba Tamura-cho, Minato-ku, Tokyo, Japan.In a previous paper (J. Soc. Textile and Cellulose Ind., 14, 594 (1958)) the influence of other factors than the degree of polymerization as shown by Alf af Ekenstam (Svensk Papperstidn., 45, 81 (1942)) on the solubility of…
Modified luneberg lens for defocused source
A spherical Luneberg lens has the property of focusing the rays from a point source on the surface of the lens into a collimated beam on the diametrically opposite side of the lens. In microwave applications a point source on the surface of the lens is usually not obtained. Curves are given for the required index of r…
The surface tension of viscous polymers at high temperatures
The maximum bubble pressure method for the determination of surface tension has been modified for use with thermally unstable, viscous, opaque polymers at high temperatures. A value of 35.1 dynes/cm. was obtained for nylon 66 at 285°C. The order of this value and those for other polymers has been compared with the val…
Kinetics of the Formation of the Iron-Tin Alloy FeSn[sub 2]
The kinetics of the formation of the iron‐tin alloy have been studied at temperatures below and above the melting point of tin (232°C). At all temperatures studied, the growth obeyed the parabolic‐rate law. This is indicative of a diffusion mechanism. An Arrhenius plot of the data gives a straight line below the melti…
Electrochemiluminescence at a Silicon Anode in Contact with an Electrolyte
Abstract not Available.
Hydrogen Pickup in Various Zirconium Alloys during Corrosion Exposure in High-Temperature Water and Steam
The hydrogen pickup during corrosion in high‐temperature water and steam of various binary and ternary alloys of zirconium with iron and tin has been studied. The total hydrogen content of specimens exposed to 400°C steam was found to be greater than that of specimens exposed to 360°C water. Furthermore, the per cent…
Hall‐Effekt und Leitfähigkeit der Eisen‐Nickel‐Legierungen
Abstract Messungen bei 20 °C an Legierungen zwischen 100% Fe und 75% Fe. 25% Ni ergaben im magnetisierungsabhängigen Teil der Hall‐Feldkurven und auch oberhalb der Sättigung positive Hall‐Konstanten. Sowohl R 1 als auch R 0 werden durch Zusatz von Nickel zu Eisen vergrößert. Bei dem Übergang von den raumzentrierten zu…
Isomorphous replacement in copolyamide systems: Adipic and terephthalic acids
Abstract Copolyamides with mixtures of adipic and terephthalic acids in various mole rations and three types of diamine were prepared, and a melting point vs. composition curve for each system was constructed. The three types of diamine were: (1) straight‐chain aliphatic diamines with six to twelve carbon atoms, (2) m…
The Influence of Temperature and Strain Rate on the Flow Stress of Magnesium Single Crystals
The temperature and strain rate-dependence of the flow stress of magnesium single crystals was measured in the temperature range 1� 45-248 oK. Some incidental observations were also made on the form of the stress-strain curves and the appearance of Blip lines. The deformation characteristics show close similarity with…
3—THE GEOMETRY OF WARP-KNITTED FABRICS
By constructing a simplified physical model, the geometrical relationships that exist in an unfinished 2-bar warp-knitted fabric are determined. Hence, a method for calculating the run-in from the course–wale spacing of a fabric in the loom state and the denier of the yarn is deduced. It is further shown how to calcul…
331. The synthesis of derivatives of corrole (pentadehydrocorrin)
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Clay minerals associated with the Lake Superior iron ores
Accessory clay-size minerals occur as disseminated particles and as fillings of pockets and fissures in the Lake Superior iron ores, the oxidized iron-formation, and the associated altered dikes. Dickite and kaolinite are the most abundant clay minerals in the Marquette, Gogebic, and Iron River districts of Michigan a…
HAEMATOCOCCUS IN SOUTHERN AFRICA
Knowledge of the genus Haematococcus is briefly summarized, the existence in Southern Africa of many habitats suitable to the alga indicated, and the occurrence of the various species recorded. The cosmopolitan species H. lacurtris is widespread. In addition two new species are described: H. capensis with several vari…