Materials Literature
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The ignition of metals and alloys by impacting high-velocity particles in gaseous oxygen was investigated. A convergent/divergent nozzle was used to accelerate the flowing oxygen, which in-turn accelerated the particles to velocities greater than 305 m/s (1000 ft/s). The test sample (target) was placed at the end of t…
Zinc oxochlorins (porphyrinones) react with osmium tetroxide to give exclusively adjacent-ring saturated isobacteriochlorins without any bacteriochlorins that would normally arise from such a reaction with free base porphyrinones; the diols can be converted into the baem d1-like porphyrindiones.
Abstract The current values reported for the Gibbs free energy of formation for magnesite [MgCO 3 (s)] are bimodally grouped, centered at −1012 kJ mol −1 and in the range −1026 to −1030 kJ mol −1 . The solubilities of three natural magnesites in aqueous solution were determined in order to verify the appropriate value…
Composition-based correlations to predict the relative sensitization resistance of AISI 304 and 316 stainless steel (SS) have been evaluated by comparison to a large data base. The best fit to experimental data was achieved using a slightly modified version of Cihal’s elemental parameters: Cr⋆=Cr+1.6Mo−0.2Ni−100Cwhere…
Binding energies of carbonaceous overlayers on ruthenium were measured using angle-resolved XPS data and curve fitting procedures. A carbonaceous overlayer prepared by dehydrogenation of adsorbed ethylene at 750 K was disordered and had a binding energy of 285.0 eV. After annealing to 1300 K islands of azimuthally ord…
The degradation of fracture resistance of ferritic steels subjected to neutron irradiation can be qualitatively evaluated by examining the shift in the ductile-to-brittle transition temperature and the drop in the upper-shelf energy as determined in the Charpy impact test. That is an empirical test, however, and its u…
The secondary alcohol oxidase from Pseudomonas sp. catalyzed the oxidation of various vinyl alcohol oligomers with the molecular weight of 220 to 1500 and of β-ketols such as 5-hydroxy-3-heptanone, 4-hydroxy-2-nonanone, 3-hydroxy-5-nonanone, 6-hydroxy-4-nonanone, 7-hydroxy-5-dodecanone, and 8-hydroxy-6-tridecanone. β-…
Martine Chevillard, Pierre Couble, Jean-Claude Prudhomme; Complete nucleotide sequence of the gene encoding the Bombyx mori silk protein P25 and predicted
The complexes [FeIIL(CN)2]·xH2O of the macrocyclic Schiff-base ligands L1–L3 derived from the condensation of 2,6-diacetylpyridine with 3,6-diazaoctane- 1,8-diamine (L1), 3,7-diazanonane1,9-diamine (L2), and 3,6-dioxaoctane-1,8-diamine (L3) have been prepared and their magnetic susceptibilities and Mössbauer spectra s…
Experimental evidence for the formation of Ti 3 B 4 with an orthorhombic Ta 3 B 4 ‐type structure is presented. This phase forms by a peritectic reaction between TiB 2 and liquid at ∼2200°C and is stable to temperatures at least as low as 1690°C, the lowest temperature at which samples were annealed. No evidence was f…
Abstract
In an invariant formulation of pth-grade continuum mechanics, forces are defined as elements of the cotangent bundle of the Banach manifold of Cp embeddings of the body in space. It is shown that forces can be represented by measures which generalize the stresses of continuum mechanics. The mathematical representation…
Etude de la densite, de la stabilite dimensionnelle et des proprietes de sorption de composites obtenus par impregnation de bois de Pinus radiata, Picea abies, Fagus sylvatica et Populus marilandica par des resines epoxydes
Abstract Phosphorus transformations that occur after anoxic soils are drained have been associated with acute P deficiencies in rotation crops following rice. Flooded rice may not respond to P fertilization while rotation crops respond markedly to P fertilization on similar soils. The changes that occur among the inor…
The S= 9/2 ground state of a linear MnIICuIIMnII trinuclear complex arises from the parallel alignment of the local spins (5/2) of the two terminal MnII ions through antiferromagnetic interactions with the local spin (1/2) of the central CuII ion.
[Au6(PPh3)6][NO3]2 has been synthesised in low yield from [Au8(PPh3)8][NO3]2 and K[Ag(CN)2] and characterised by a single-crystal X-ray diffraction study. The compound crystallises as [Au6(PPh3)6][NO3]2·3CH2Cl2 in the monoclinic space group P21/a with four formula units in a cell of dimensions a= 25.674(5), b= 15.843(…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTris(o-phenylenedioxy)cyclotriphosphazene: the clathration-induced monoclinic to hexagonal solid-state transitionHarry R. Allcock, Michael L. Levin, and Robert R. WhittleCite this: Inorg. Chem. 1986, 25, 1, 41–47Publication Date (Print):January 1, 1986Publication History Pub…
Abstract Deca-dodecasil 3R, 120 SiO 2 · 6M 10 · 9M 12 · 6M 19 with M 12 = N 2 and M 19 = C 10 NH 17 (1-aminoadamantane), crystallizes in space group R [unk] m with a = 13.860(3) Å and c = 40.891(8) Å. Its crystal structure is built by corner-sharing [SiO 4 ] tetrahedra. The tetrahedra are connected to pseudohexagonal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical generation of an iron(IV) porphyrinJohn T. Groves and John A. GilbertCite this: Inorg. Chem. 1986, 25, 2, 123–125Publication Date (Print):January 1, 1986Publication History Published online1 May 2002Published inissue 1 January 1986https://pubs.acs.org/doi/10.…
Aqueous solutions containing sodium phosphate and sodium molybdate ([P]= 0.01–0.07 mol l–1[Mo] : [P]= 1.25–15) were acidified with concentrated HCl and the formation of molybdophosphate anions was followed by 31P n.m.r. spectroscopy with a view to establishing this technique as an easily applicable method for the iden…