Materials Literature
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Homothallic strains of Saccharomyes cerevisiae are able to switch efficiently from one mating genotype to another. From a single haploid spore arise both a and mating type cells, which then self-mate to produce a colony consisting almost exclusively of nonmating a/ diploid cells. We have isolated a mutant homothallic…
Summary Paired soils of high and low organic matter content from the East Anglian silts were used to determine the role of different organic constituents and complexed metal ions in relation to aggregate stability. Although leaching with periodate and borate caused some loss of stability for most of the soils, the cha…
Azotobacter beijerinckii synthesized up to 70% of its dry weight as poly-β-hydroxybutyrate when grown in batch or oxygen-limited chemostat cultures on a glucose/ammonium salts medium. In a series of steady states during transition from oxygen to ammonium limitation and at different dilution rates in the chemostat, the…
The miscibility gap of the α phase in Fe-Cr-Co permanent magnet alloys is constructed using mechanical hardness and Curie temperature measurements. It is found that the miscibility gap of the Fe-Cr binary system develops into Fe-Cr-Co ternary system, and that the addition of cobalt raises the decomposition temperature…
Ultrasonic data for the velocities of the low- and high-pressure polymorphs of stannate and titanate compounds undergoing the spinel → rocksalt + rutile (Mg2SnO4, Co2SnO4) and spinel → rocksalt + ilmenite (Mg2TiO4, Co2TiO4) phase transformations have been determined as a function of pressure to 7.5 kbar at room temper…
Abstract The kinetic parameters of the polymerization of diglycidyl ether of bisphenol A with hexahydrophthalic anhydride and benzyldimethylamine as catalyst were determined using differential scanning calorimetry. The reaction was found to be first order with some variation with temperature, and the activation energy…
Abstract Stable isothermal multiplicities were observed during carbon monoxide oxidation in an integral reactor, filled with alumina supported platinum catalysts. The multiplicities were investigated in the conversion‐temperature, conversion‐inlet carbon monoxide concentration and conversion‐mass flow rate domains. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPressure-Volume-Temperature Measurements on Atactic Polystyrene. A Thermodynamic ViewHans-Jürgen Oels and Günther RehageCite this: Macromolecules 1977, 10, 5, 1036–1043Publication Date (Print):September 1, 1977Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of peroxyacetylnitrate in the presence of nitric oxideRichard A. Cox and Michael J. RoffeyCite this: Environ. Sci. Technol. 1977, 11, 9, 900–906Publication Date (Print):September 1, 1977Publication History Published online1 May 2002Published inissue 1 S…
Summary Abundant spherules of phengite, 50—150 μm in diameter and with a radial texture, occur in mudstones at the top of the lowest member of the Bonahaven Formation. They have smooth, sharp boundaries, show flattening next to desiccation cracks and exhibit a restricted, bi-or tri-modal size distribution. It is infer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and absolute configuration of optically active C2-bishomocubane (pentacyclo[5.3.0.02,5.03,9.04,8]decane)Masao Nakazaki and Koichiro NaemuraCite this: J. Org. Chem. 1977, 42, 18, 2985–2988Publication Date (Print):September 1, 1977Publication History Published online…
The DC voltage insulating performance of compressed SF6gas at multimegavolt levels was studied in a metal-clad test facility containing large, 760 mm dia., horizontal coaxial electrodes. Seven different coaxial systems which employed cast epoxy post-type spacers for supports were investigated at gas pressures from 1 t…
Flow of liquid crystal from one electrode to the other was observed during dynamic scattering of a phenyl benzoate nematic liquid crystal. The direction of the flow depended upon the electrochemical properties of dopants. The flow was from cathode to anode when the dopant was an electron acceptor, and vice versa when…
For pt.CXIX see Z. Naturforsch. a, vol.32, p.134 (1977). The crystal structure of lithium nitrate trihydrate, LiNO 3.3H 2O, has been determined by X-ray diffraction at 295K. The crystal is orthorhombic, space group Cmcm, a=6.8018 (4), b=12.7132 (9), c=5.9990 (4) Aring, V=518.75 Aring 3, Z=4. The nitrate ions, Li + ion…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of iron(II) porphyrins and hemoproteins by nitro aromaticsJan H. Ong and C. E. CastroCite this: J. Am. Chem. Soc. 1977, 99, 20, 6740–6745Publication Date (Print):September 1, 1977Publication History Published online1 May 2002Published inissue 1 September 1977https:…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation J. O'Brien, E. Cashell, G. E. Wardell, V. J. McBrierty; An NMR Investigation of the Interaction between Car…
The crystal structure of sodium azide, NAN3, has been reinvestigated by X-ray diffraction methods. The electron density of the azide ion as determined using a high-order X-ray refinement is compared with the theoretical density determined in an ab initio molecular-orbital calculation. The wavefunction of the azide ion…
When polymers are degraded by submitting them to shearing action, neither the probability of scission of a macromolecule, as a function of molecular weight (MW), nor the probability distribution of the lengths of the resulting fragments is known a priori. Information about these probabilities can be obtained by compar…
Abstract The thermal oxidative degradation of two aromatic and one segmented polyurethane has been studied, with special emphasis on HCN evolution over a range of temperatures and oxygen concentrations. A tentative mechanism for HCN formation has been presented. Other gaseous products were ascertained by chromatograph…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemical consequences of ionic bonding in alkali metal acetylacetonatesMorton Raban, Eric A. Noe, and Gaku YamamotoCite this: J. Am. Chem. Soc. 1977, 99, 20, 6527–6531Publication Date (Print):September 1, 1977Publication History Published online1 May 2002Published inis…