Materials Literature
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Abstract The E.P.R.‐spectra of zone‐refined V 2 O 5 are interpreted in terms of a defect centre consisting of an unpaired electron interacting with two equivalent vanadium nuclei separated by an oxygen vacancy. This conception leads to the establishment of a defect formula for V 2 O 5 , involving V 4+ and V 3+ ions. A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition Metal Complexes Containing 1,1-Dicyanoethylene-2,2-dithiolateBeatrice G. Werden, E. Billig, and Harry B. GrayCite this: Inorg. Chem. 1966, 5, 1, 78–81Publication Date (Print):January 1, 1966Publication History Published online1 May 2002Published inissue 1 January…
Chemical bonding, a requirement for adherence, is developed at glass‐metal interfaces by achieving and maintaining equilibrium compositions at the interfaces. Reactions between iron and glasses with and without “adherence oxides” were studied by thermogravimetry, optical microscopy, and electron probe microanalysis. A…
When catalytic aluminas are heated to a high temperature, sites are produced on the surface which are capable, at room temperature, of oxidizing polynuclear aromatic hydrocarbons to the corresponding ion-radical, provided oxygen is present. The oxidizing activity depends markedly on the conditions of activation. Fully…
Abstract This note suggests a possible origin of low energy tails observed in radiative recombination when at least one of the participating bands is degenerate. An order‐of‐magnitude calculation is made which shows that the effect can have the same origin as similar effects in the soft X‐ray emission spectra of metal…
A detailed investigation of different methods for determining electron trap parameters has been made on crystals of CdS-CdSe. The principal techniques involved are decay of photoconductivity and thermally stimulated conductivity (TSC). Direct evidence of a quasicontinuous trap distribution with total density of 5×1015…
A study has been made of the adsorption of homogeneous non-ionic detergents from aqueous solution on Graphon. At a fixed temperature maximum adsorption increases with increasing alkyl chain length and diminishes with increasing size of the hydrophilic head group. In contrast to the behaviour normally observed for the…
Abstract Nach dem „Sprühverfahren”︁ wurden n‐leitende Indiumoxydschichten mit Schichtdicken zwischen 0,1, und 0,5 μm auf Glasplatten hergestellt und die Herstellungsbedingungen dieser Schichten untersucht. Die Leitfähigkeit der Schichten liegt je nach Dotierung zwischen 1,5 × 10 2 und 4,3 × 10 3 Ω −1 cm −1 und die Kon…
The metazoans on Fucus serratus L. and its epiphytes were studied quantitatively at a locality in the northern Øresund. A total of 164 species was found and the different systematic units treated faunistically and ecologically. The ecological conditions for algalliving animals are discussed, with special reference to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Properties of Intermetallic Compounds between the Lanthanides and Nickel or CobaltJohn Farrell and W. E. WallaceCite this: Inorg. Chem. 1966, 5, 1, 105–109Publication Date (Print):January 1, 1966Publication History Published online1 May 2002Published inissue 1 Janua…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Toluenedithiolate and Maleonitriledithiolate Square-Matrix SystemsRaymond Williams, E. Billig, James H. Waters, and Harry B. GrayCite this: J. Am. Chem. Soc. 1966, 88, 1, 43–50Publication Date (Print):January 1, 1966Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAction of Proteolytic Enzymes on Tropocollagen and Insoluble Collagen*M. P. Drake, P. F. Davison, S. Bump, and F. O. SchmittCite this: Biochemistry 1966, 5, 1, 301–312Publication Date (Print):January 1, 1966Publication History Published online1 May 2002Published inissue 1 Ja…
2種類の遷移型アルミナ, ガンマ型, シータ型がアルファアルミナに転移する際の水蒸気の効果が論じた. この際, 遷移型アルミナ格子中の水の作用も考慮した. ガンマ型には格子水があり, シータ型にはない.まず, 一定時間, 各温度, 各水蒸気圧下で, 両型のアルミナを加熱し生成したアルファアルミナを定量した. 温度は, 1000℃ないし1270℃, 水蒸気圧は, 760mmHg, 17.5mmHg, 0.0005mmHgである. この結果, 水蒸気はアルファアルミナ生成温度を低下させること, ガンマ型の方が低い温度でアルファ型になること, が明らかになった. ついで, 760mmHg, 17.5mmHg水蒸気圧下で, 一定温度, 各…
TABLES OF DEFLECTION FACTOR VALUES FOR THREE-LAYER ELASTIC SYSTEMS LOADED WITH UNIFORM CIRCULAR LOADS HAVE BEEN PUBLISHED BY A. JONES OF THE THORNTON RESEARCH CENTER, IN CONNECTION WITH THE DEVELOPMENT OF A FUNDAMENTAL METHOD OF PAVEMENT DESIGN. FOR CONVENIENCE IN THE DESIGN AND ANALYSIS OF PAVEMENT STRUCTURES, THESE…
Abstract : Two basic approaches are presented for achieving combustion of ammonia in internal combustion engines. The first approach is one of integrating the ammonia combustion capability into the research and development of engines for the 1975-80 time frame. This approach would have the objective of building and a…
The rate and products of the uranium + water + oxygen reaction have been studied. Oxygen reduces the corrosion rate 30 to 100-fold and is consumed during the reaction. The oxygen is converted to water and does not react directly with the uranium. Only traces of hydrogen are evolved except under condensation conditions…
The heat capacities of UN, UN1.59 and UN1.73 have been measured from 11 to 320°K. The Cp curves for the three compounds show anomalies at 52, 94 and 33°K respectively, corresponding to magnetic ordering phenomena. The values of the standard thermodynamic functions are tabulated, together with heats and entropies of th…
Abstract We first summarize available experimental evidence indicating the existence of a second‐order transition or relaxation region in atactic polystyrene at 60 to 100°C. above T g . It increases from 137°C. at a molecular weight of 3000 to 192°C. at a molecular weight of 392,000. It appears in such diverse measure…
The persistence of vaccinia virus on wool (blanket and gabardine) and cotton (sheeting, terry cloth, and knit jersey) fabrics was studied. The fabrics were exposed to the virus by three methods: direct contact, aerosol, and virus-containing dust having a high content of textile fibers. Fabrics exposed to virus by each…
The effects of temperature, relative humidity and pH on the rate of the uranium + water reaction have been studied. Linear rates of corrosion and hydrogen evolution are obtained at different temperatures and the derived activation energies vary from 12 to 17 kcal mole–1 depending on the batch of uranium. Hydrogen has…