Materials Literature
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Oxygen ion vacancies, which absorb light at 250 nm, are observed in 'pure' mgo after irradiation with 0.23-29 mev electrons. The threshold energy for anion vacancy formation is observed to occur at 0.33 mev; this corresponds to a displacement energy t d =60 ev. Energy independent damage is observed below the threshold…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and some properties of yttrium and lanthanide isopropoxidesKhodabakhsh S. Mazdiyasni and Lawrence Milton BrownCite this: Inorg. Chem. 1970, 9, 12, 2783–2786Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 De…
Abstract The adsorption of CO on a clean Pd(lll) surface has been studied by means of low energy electron diffraction (LEED), contact potential measurements and flash desorption. At coverages ㊀ between 1/3 and 1/2 ordered adsorption phases are observed for which structure models are derived. The maximum increase of th…
Orthologs and paralogs are two fundamentally different types of homologous genes that evolved, respectively, by vertical descent from a single ancestral gene and by duplication. Orthology and paralogy are key concepts of evolutionary genomics. A ...Read More
SUMMARY Apparent K m values for nitrite reductase, glutamic dehydrogenase, and nitrate reductase are of the order 10 −4 molar for nitrite, ammonia, and nitrate, respectively while half‐saturation constants for the corresponding uptake mechanisms approximate 10 −6 molar. Ammonium and nitrate are accumulated in the vacu…
Article Refinement of the nepheline structure at several temperatures was published on December 1, 1970 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 132, issue 1-6).
A study has been made of the partial discharge characteristics of artificial cavities in polyethylene under combined 60-Hz and negative 1.2/50-μs impulse stresses, the amplitude of the altemating stress being below discharge inception value. Samples of cross-linked and low-density polyethylenes were tested. The discha…
Domain walls in barium hexaferrite (BaFe12O19) and SmCo5 are shown to form a lattice. Defects observed in the Boch wall patterns are interpreted geometrically as dislocations and disclinations. The elastic properties of these defects are briefly discussed. The faceted appearance of some Bloch wall patterns is analyzed…
Thermal expansion of CeO 2 , Ho 2 O 8 , and Lu 2 O 3 was determined from 100° to 300°K by a back‐reflection X‐ray technique. The variation of thermal expansion with temperature is the same as that of specific heat for CeO 2 and Ho 2 O 3 ; these oxides obey the Grueneisen model of thermal expansion in the temperature r…
The atomic positions around the core of the (a/2) 〈111〉 screw dislocation in α iron have been investigated using a new interatomic potential with a cutoff distance between third and fourth neighbors. A radical expansion term has been included in specifying the boundary conditions. Two configurations with about the sam…
In recent years the GI method(1) for electronic wavefunctions has been used to improve upon Hartree- Fock and yet retain the orbital interpretation. In the GI method we allow every orbital to be different (no double occupation restriction) and yet retain the correct spin symmetry.(2) The result is one electron per orb…
A comparative study has been carried out on the dielectric-loss behavior of kraft-paper cable models impregnated with standard insulating oils and silicone liquids of the same viscosity range. It has been found that the ionic conduction losses in the solid-liquid systems are more affected by the viscosity than the che…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkoxyphosphazenes as Flame Retardants for RayonLenard E. A. Godfrey and Joseph W. SchappelCite this: Ind. Eng. Chem. Prod. Res. Dev. 1970, 9, 4, 426–436Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December 1970ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew books - Active carbon: Manufacture, properties, and applicationsMilan Smisek and Slavoj CernyCite this: Anal. Chem. 1970, 42, 14, 81APublication Date (Print):December 1, 1970Publication History Published online21 September 2008Published inissue 1 December 1970https://pub…
Abstract Nitrosodicyanmethanid [NOC(CN) 2 ] − bildet mit Übergangsmetallen Nitrokomplex‐analoge Koordinationsverbindungen. Es werden Tetrapyridinkomplexe [M(C 5 H 5 N) 4 (ONC(CN) 2 ) 2 ] (M = Mn, Fe, Zn) sowie Komplexe des Nickel(II)‐nitrosodicyanmethanids mit weiteren Liganden wie substituierten Pyridinen, Acetonitri…
Abstract A study is carried out to investigate the effects of spinning conditions on fiber formation in the wet‐spinning process. The spinning conditions studied are free velocity (and hence free diameter), throughput rate, maximum take‐up velocity, jet stretch (the ratio of take‐up velocity to free velocity), and fil…
Detailed calculations of the characteristics of the magnetostatic surface waves in a ferrite slab with a metalized surface are presented. The region of validity of the effective boundary condition model (EBCM) discussed by Seshadri is established. It is shown that the dispersion characteristics of overlayed magnetic s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactive Flame Retardants for Polyurethane FoamsAnthony J. PapaCite this: Ind. Eng. Chem. Prod. Res. Dev. 1970, 9, 4, 478–496Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December 1970https://pubs.acs.org/doi/10.10…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structures of low-spin, square-pyramidal complexes of nickel(II)Harry B. Gray and James R. PreerCite this: J. Am. Chem. Soc. 1970, 92, 25, 7306–7312Publication Date (Print):December 1, 1970Publication History Published online1 May 2002Published inissue 1 December…
Abstract The solubility of carbon in sodium over the range 600‐950° may be expressed by the equation: log sol. = 7.20‐5465/T where solubility is in ppm and T in °K. From plots of carbon activity versus concentration, and from observations that oxygen does not affect carbon solubility, it is proposed that carbon dissol…