Materials Literature
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The influence of temperature and strain rate on the flow stress of polycrystalline aluminium, and single crystals of aluminium, copper and silver was studied. Tensile tests were carried out at various temperatures down to 1.7°K. The results indicate that the reversible change of flow stress (after correction for varia…
Diffraction patterns obtained from atomically clean germanium surfaces contained half-integral order beams in (110) azimuths for both (100) and (110) surfaces and in all azimuths for the (111) surface. These results are considered to be due to displacements of surface atoms from their normal bulk lattice positions in…
Abstract The dissociation of hydrogen at a tungsten filament has been studied in the temperature range 1200 to 1800°K and at pressures between 10-2 and 10-6 mm. The results obtained differ from those found in the literature and it is shown that this is because the surfaces employed by previous workers were contaminate…
Abstract Es werden die textilchemischen Eigenschaften (Oberflächenspannung, Grenzflächenspannung, Netzvermögen, Emulgiervermögen, Schaumvermögen, Schaumbeständigkeit, Schmutztragevermögen, Waschvermögen) von p‐n‐Alkylbenzolsulfonaten in Abhängigkeit von der Länge ihrer Alkylkette untersucht. Grenzflächenaktivität im t…
Received 24 February 1959DOI:https://doi.org/10.1103/PhysRevLett.2.250©1959 American Physical Society
Received 26 February 1959DOI:https://doi.org/10.1103/PhysRevLett.2.254©1959 American Physical Society
As part of a program to correlate X-ray and nuclear magnetic resonance data on the structures of oxy-anions, it was found necessary to re-investigate the crystal structure of kernite. The results of this study indicate that the originally proposed space group and structure
Abstract 1. The reaction between trichlorothiophenol or dienols and SO2 brings about vulcanization of rubber without separation of elemental sulfur. The mechanism of the Peachey process of rubber vulcanization is examined on the basis of concepts of the role of intermediate products of the reaction—free radicals. 2. S…
Abstract The present paper deals with the results of an orientating, quantitative investigation of sulfur vulcanization accelerated by thiuram disulfide, with tetramethylthiuram disulfide as the representative example. It was found: In the sulfur cure of natural rubber with tetramethylthiuram disulfide at different TM…
The effects of variations of the thickness of the individual layers of an interference filter made with dielectric multilayers are examined, with respect both to the displacement of the pass band and to its width as affected by random fluctuations in these thicknesses. It is shown that the use of special multilayer st…
Summary A hydrated barium-strontium pyrochlore with only subordinate amounts of Ca and Na has been found in a weathered biotite rock (contact-rock of a carbonatite) from Panda Hill, Tanganyika, as small euhedral yellowish-grey cubic crystals (showing the combination of the octahedron and the cube) in a rock containing…
Seven plane gratings of high quality having ruled widths of more than 10 in. have now been produced on the M.I.T. servo controlled ruling engine, monitored with interference fringes. Resolving powers closely approaching the theoretical 900 000 in the 12th order green, and above 1 200 000 in the 26th order of 2537 A, h…
The t riclinic m odification of M gzBz0 5 wa s classifi ed as a m ember of a n isostr uct ural seri es which also includes MnzBz0 5, F ezBz0 5, and C02Bz0 5 Th e cr ystal st ru cture was re fi ned by the use of successive Fourier projectio ns and a least-squares refi nement program on a n electroni c compu ter. The st…
Abstract High molecular weight polyoxymethylenes are not soluble at room temperature in any of the hundreds of solvents or solvent systems tested. However, solutions can be obtained at elevated temperatures with a wide variety of solvents. Phenolic compounds are the most effective at temperatures of 50–100°C. At the o…
ADVERTISEMENT RETURN TO ISSUEPREVArticlePreparation and Properties of the Systems LanFexCr1−xO3 and LaFexCo1−xO3Aaron Wold and William CroftCite this: J. Phys. Chem. 1959, 63, 3, 447–448Publication Date (Print):March 1, 1959Publication History Published online1 May 2002Published inissue 1 March 1959https://pubs.acs.or…
Abstract Die Geschwindigkeit der Wasserstoffentwicklung bei der Umsetzung von NaBH 4 mit H 2 O zeigt, daß das erste Wasserstoffatom des BH rascher reagiert als die übrigen drei. Der Schluß, daß sich ein primäres Reaktionsprodukt Na[H 3 BOH] bildet, konnte infrarotspektroskopisch bestätigt werden. Die weitere Hydrolyse…
Europium oxide of 99.7% purity was compacted into small bars and pellets which were fired at temperatures from 1050° to 1700°C. for 2 to 120 hours in atmospheres that were oxidizing, mildly reducing (open furnace), or strongly reducing. It was found that (1) europium oxide compacts fired in oxygen for 2 hours at 1500°…
Abstract Vapor pressures were measured for the system, poly(vinyl alcohol)‐water at 30°C. with the apparatus reported in the preceding paper. Fractionated samples were used in the form of thin films, carefully dried under high vacuum at room temperature. The degree of crystallinity of these samples was about 0.2, and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Thermal Reaction of Styrene with Ethyl Thioglycolate; Evidence for the Termolecular Thermal Initiation of Styrene PolymerizationRichard R. Hiatt and Paul D. BartlettCite this: J. Am. Chem. Soc. 1959, 81, 5, 1149–1154Publication Date (Print):March 1, 1959Publication Histo…
Larger-than-band-gap photovoltages have been observed in both cubic and hexagonal crystals of ZnS with stacking faults. Under monochromatic excitation the photovoltage measured parallel to the $c$ axis shows two sign reversals at about 3300 A and 3500 A and peaks at approximately 3250 A and 3400 A. The position of the…