Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of low-spin cobalt porphyrins. VI. Molecular stereochemistry of (1,2-dimethylimidazole)-.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatocobalt(II)Patrick N. Dwyer, Paul Madura, and W. Robert ScheidtCite this: J. Am. Chem. Soc. 1974, 96, 15, 4815–4819Publi…
Abstract The π–π* absorption spectra of p-benzoquinone, α-naphthoquinone, anthraquinone, and their derivatives, mainly in n-heptane up to the vacuum UV region, were obtained. On the other hand, MO calculations of the n-electronic systems of these p-quinones and o-benzoquinone were carried out by means of the P-P-P met…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of cobalt porphyrins. III. Structure of 2,3,7,8,12,13,17,18-octaethylporphinato(1-methylimidazole)cobalt(II). Model for deoxycoboglobinRobert G. Little and James A. IbersCite this: J. Am. Chem. Soc. 1974, 96, 14, 4452–4463Publication Date (Print):July 1, 1974…
A model for fuel-coolant interactions is proposed. The interaction is divided into five stages: an initial perturbation which triggers the interaction and causes a vapour bubble to form at the fuel-coolant interface; bubble expansion and collapse with jetting; penetration of the fuel by the liquid jet; heat transfer f…
This book deals with the methods of X-ray production at a level which is accessible to advanced undergraduates and researchers who use X-rays. It also discusses the fundamentals of these physical properties from an experimental viewpoint which is not covered in more specialised texts. The book begins with a survey of…
Abstract The crystal and molecular structure of the complex of amylose with dimethyl sulfoxide has been studied by a combination of stereochemical analysis, potential energy, and X‐ray diffraction methods. The complex crystallizes in a pseudotetragonal unit cell with a = b = 19.17 Å and c (fiber axis) = 24.39 Å, with…
Abstract The 85-residue structure of Chromatium high potential iron protein (HiPIP) has been determined by x-ray diffraction methods at 2.0 A resolution, and is currently undergoing crystallographic refinement. The partially refined HiPIP structure reported here has an R factor of 0.24. Moreover, bond distances and an…
Abstract The cell factor that is involved in tumor-associated fibrinolysis has been partially purified from the supernatant fluid of transformed chicken embryo fibroblast cultures. It is an arginine-specific protease that acts as a plasminogen activator. The molecular weight is approximately 39,000, and the irreversib…
Five species of Azollopsis Hall, 1968, are described from strata of Campanian to Paleocene age. The spores were recovered from the Belly River and Edmonton Groups of central Alberta, Canada.The genus Azollopsis is emended to include forms with circinate glochidia. Two subgenera, Spiralopsis subg. nov. and Azollopsis s…
Messung des Dampfdrucks über flüssigem Calcium durch Siedepunktbestimmung bei verschiedenen Drücken im Temperaturbereich 900 bis 1375 °C. Angabe von Gleichungen für die Dampfdruckkurve unter Berücksichtigung der Temperaturabhängigkeit der Verdampfungswärme. Erörterung der Schrifttumsergebnisse von Dampfdruckmessungen…
Using a 40 cm curved crystal spectrograph of the transmission (Cauchois) type the chemical shifts in the X-ray K absorption edge of copper in a number of copper compounds has been measured. In all the compounds investigated the K absorption discontinuity is found to shift towards the high energy side relative to the p…
The feasibility of employing heat pipe cooling in an A-C Induction Motor has been demonstrated with the successful analysis, design and construction of an experimental motor. The heat pipes were integrally designed into both the rotor and stator of the motor allowing the heat absorbing section (evaporator) of the heat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural characterization of the nickel(II) and copper(III) complexes of the 1,1-dicarboethoxy-2,2-ethylenedithiolate ligandF. J. Hollander, M. L. Caffery, and D. CoucouvanisCite this: J. Am. Chem. Soc. 1974, 96, 14, 4682–4684Publication Date (Print):July 1,…
Two-way stretch fabrics for apparel uses can be efficiently produced from natural fibers by using elastic core-spun yarns. The fabric structure influences stretch characteristics considerably. An open weave offers higher stretch than a close weave. The thread count distribution significantly varies fabric stretch. An…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence properties of sulfonamide drugsJ. W. Bridges, L. A. Gifford, W. P. Hayes, J. N. Miller, and D. Thorburn. BurnsCite this: Anal. Chem. 1974, 46, 8, 1010–1017Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July…
The mechanical behavior of polyurethane, polyoxymethylene and branched low density polyethylene is evaluated at various levels of hydrostatic pressure from atmospheric up to 6.9 Kb. Polyurethane undergoes a “ductile-brittle-ductile” transition accompanied by decreased strain hardening and also exhibits intrinsic yield…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTriboluminescence of coumarin. Fluorescence and dynamic spectral features excited by mechanical stressJeffrey I. Zink and Wolfram KlimtCite this: J. Am. Chem. Soc. 1974, 96, 14, 4690–4692Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Publi…
The first part of a collaborative survey of the linear and nonlinear optical properties of silver thiogallate, carried out by the Centre National d'Etudes des Télécommunications (Bagneux) and the Department of Electronics of the University of Southampton, is presented. A detailed study of second-harmonic generation (S…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemical control of valence. II. Behavior of the {MNO}n [metal mononitrosyl] group in ligand fieldsJohn H. Enemark and Robert D. FelthamCite this: J. Am. Chem. Soc. 1974, 96, 15, 5002–5004Publication Date (Print):July 1, 1974Publication History Published online1 May 20…
New measurements are presented on the absorption of silver thiogallate and related to fundamental mechanisms. All available data on the refractive indices of silver thiogallate, including new results for the visible, have been incorporated into sets of Sellmeier expressions. Different Sellmeier constants are given for…