Materials Literature
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The various optical, caloric, dielectric, elastic, and microwave investigations which have been used to study the tunneling states connected with the motion of atomic and molecular impurities in alkali halides are reviewed.
Abstract The free‐radical emulsion polymerization of chloroprene containing monovinylacetylene in concentrations from 0% to 10% has been studied. It was found that in the presence of monovinylacetylene, a polymer with a great gel content, increased values of plasticity, and deteriorated physical and mechanical propert…
Abstract Steigende Qualitätsanforderungen an das für die Schmelzfluß‐Elektrolyse zur Aluminium‐Gewinnung benötigte Aluminiumoxid führten zur Entwicklung eines neuen Wirbelschichtverfahrens zur Entwässerung von Aluminiumhydroxid. Das Verfahren, in dessen aus Wirbelschichtofen und Rückführzyklon gebildeten Hochtemperatu…
Measurements were made of ionic fluxes in cells of the marine algae G. monile and G. pulvinata. The data for sodium and chloride fluxes appear to be consistent with the usually proposed model for the plant cell in which the vacuolar, cytoplasmic, and external compartments are in series, with the cytoplasm bounded on t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleLifetime of the 4T2g state of chromium(III) complexesShou-Nan Chen and Gerald B. PorterCite this: J. Am. Chem. Soc. 1970, 92, 7, 2189–2190Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue 1 April 1970https://pubs.acs.org/doi/10…
The magnetizations of phosphates and vanadates of rare-earth elements RXO 4 (R=Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb, and X=P and V) were studied in the temperature range of 1.9°K to 630°K. There were not found any magnetic transitions between 4.2°K and 630°K for all system, while F. F. Y. Wang et al. reported som…
1. Threonine aldolase was purified about 200-fold in 10% yield from Clostridium pasteurianum and its properties were examined. The final preparation gave three bands after ionophoresis on polyacrylamide gel. 2. The purified enzyme was shown to produce glycine and acetaldehyde in stoicheiometric amounts from threonine.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh molecular weight boron sulfides. V. Vaporization behavior of the boron-sulfur systemHorng-Yih Chen and Paul W. GillesCite this: J. Am. Chem. Soc. 1970, 92, 8, 2309–2312Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue…
Abstract Das IR‐Spektrum von [ONC(CN) 2 ] − wird beschrieben. Die Zuordnung der Banden geschieht mit Hilfe von partieller 15 N‐Substitution. Bildet dieses Anion Komplexe, so verschieben sich seine IR‐Banden. Die Verschiebungen werden angegeben und die möglichen Bindungsverhältnisse diskutiert. Ferner wird ein unerwart…
Interstitial order-disorder transformation regarding oxygen atoms dissolved in alpha-titanium has been studied by neutron diffraction on single crystals in the range from 17 to 28 at% O. Occupation probabilities of the oxygen atoms in the octahedral interstitial sites are determined quantitatively with the variation o…
An inconsistency between M\"ossbauer and neutron-diffraction measurements on Mn${\mathrm{Te}}_{2}$ is resolved. A new generalization of magnetic ordering of the first kind preserves the characteristic neighbor relationships of that scheme and at the same time accounts for the M\"ossbauer results.
Abstract The diffusion of ethyl p ‐aminobenzoate in silicone rubber membranes containing varying amounts of a high surface area fumed silica filler is described, as is a new apparatus for assaying multiple samples. It is shown that increased filler loading results in what appears to be a linear decrease in transmissio…
The equation of motion for cracks which are subjected to stress pulses is derived by the Lagrangian method. An asymptotic solution is used to determine terminal crack velocity. The time in which essentially constant velocity will be reached is determined. The equation is further used to formulate a dynamic stability c…
The secondary wall of cotton fiber contains well aligned helical macrofibrils of about 1000 Å diameter, changing sign in irregular intervals. The sign reversals are in some respect cross sections of enhanced mechanical strength, particularly in respect to swelling. The macrofibrils are composed of a great many microfi…
Ultraviolet spectra of thallium(I), lead(II), and bismuth(III) in chloride–sulfate and all-sulfate glasses have been studied, and it is observed that the P13 ← 1S0 transition undergoes a blue shift as the sulfate: chloride ratio increases. This is interpreted in terms of increased ionicity of the probe metal ions in t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidative cycloaddition of metal dithiolenes to olefins. Synthesis and characterization of norbornadiene-bis-cis-(1,2-perfluoromethylethene-1,2-dithiolato)nickelRichard M. Wing, Gerald C. Tustin, and William H. OkamuraCite this: J. Am. Chem. Soc. 1970, 92, 7, 1935–1939Public…
Energy-straggling distributions of 20- and 49-MeV protons and 80-MeV helium ions have been measured for energy losses of 10 to 92% of the initial kinetic energy. Aluminum and gold absorbers were used, and the residual energy spectra were measured with lithium-drifted silicon semiconductor detectors. Experimental resul…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT31P-31P spin-spin coupling in complexes containing two phosphorus ligandsF. B. Ogilvie, J. M. Jenkins, and John G. VerkadeCite this: J. Am. Chem. Soc. 1970, 92, 7, 1916–1923Publication Date (Print):April 1, 1970Publication History Published online1 May 2002Published inissue…
Microstructures of two sodium borosilicate glasses were examined. Electron micrographs of replicas of water‐etched fracture surfaces show that the microphases increase in size with the temperature and time of heat treatment. The relative amounts of soluble and insoluble microphases remain essentially unchanged. Scanni…
Luminescence spectra, excitation spectra, and lifetimes taken on Cu and VO porphyrins in polymethylmethacrylate on a Cryo-Tip between 80 and 10°K confirm the prediction that the unpaired metal d electron couples with the porphyrin triplet to give “tripdoublet” and quartet states. Four Cu porphyrins show loss of the ma…