Materials Literature
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Zirconium alloy components can fail by hydride cracking if they contain large flaws and are highly stressed. If cracking in such components is suspected, crack growth can be minimized by following two simple operating rules: <list list-type="simple"><list-item>—components should be heated up from at least 30 K below a…
We have measured the magnetic field directly inside a thin, circular, parallel-plate capacitor as it is being charged. We find that this field varies linearly with distance from the axis, as is to be expected if a uniform displacement current flows between the plates. The measured slope of B vs r agrees with predictio…
Abstract : A need to exists to keep aircraft operators and maintenance personnel aware of the science and technology of corrosion as it applies to aircraft structures. This handbook provides information on the aircraft operating environment, corrosion theory, common airframe materials and their response to corrosion,…
Abstract It has been demonstrated that the number of particles of glass transferred to fabric is dependent upon fabric type and particle size but that the loss of particles is primarily determined by particle size.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect determination of nonradiative relaxation rates in nonfluorescent metallophthalocyaninesR. R. Millard and B. I. GreeneCite this: J. Phys. Chem. 1985, 89, 14, 2976–2978Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of methyl and hydride derivatives of permethylvanadocene and their reactions with carbon monoxideCalvin J. Curtis, James C. Smart, and John L. RobbinsCite this: Organometallics 1985, 4, 7, 1283–1286Publication Date (Print):July 1, 1985Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElimination reactions of .alpha.,.beta.-dihydroxysilanes: stereospecific synthesis of silyl enol ethers from vinylsilanesPaul F. Hudrlik, Anne M. Hudrlik, and Ashok K. KulkarniCite this: J. Am. Chem. Soc. 1985, 107, 14, 4260–4264Publication Date (Print):July 1, 1985Publicati…
The transformation of spherical alumina powders precipitated from an aluminum sulfate solution was studied using a combination of X‐ray diffraction and transmission electron microscopy. Particles calcined at 900°C consisted of poly‐crystalline γ‐alumina which transformed to essentially single‐crystal a‐alumina on furt…
P atrick , S heila & H olding , A.J. 1985. The effect of bacteria on the solubilization of silica in diatom frustules. Journal of Applied Bacteriology 59 , 7–16. Natural bacterial populations in samples of water from Loch Leven and Lough Neagh increased the rate of solubilization of frustule silica from an axenic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and spectroelectrochemistry of .sigma.-bonded aryliron porphyrins. 3. Synthesis and characterization of high, low, and variable spin state five-coordinate .sigma.-bonded aryl- and perfluoroaryl iron(III) complexesR. Guilard, B. Boisselier-Cocolios, A. Tabard…
Abstract The 195 Pt NMR parameters of several phosphorus‐platinum(O) complexes [L n Pt(O), L = phosphine or phospite, n = 2, 3, 4] have been investigated to illustrate the particular NMR properties of a spin‐1/2 heavy metal nucleus, and for elucidation of their dependence on the geometry of the complexes. In these com…
The nature of the dislocation substructure formed at α:α and α: β boundaries in Zr–Nb pressure tube alloys has been studied by electron microscopy. The character of the boundaries is established by the extrusion operation, and subsequent cold working and/or annealing treatments modify only the misorientation and natur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVariation with time of the mechanism, observable order, and activation energy of catalyst deactivation by coke in the FCC processJose Corella, Rafael Bilbao, Jose A. Molina, and Alfonso ArtigasCite this: Ind. Eng. Chem. Process Des. Dev. 1985, 24, 3, 625–636Publication Date…
Abstract A method was developed and tested which is suitable for the routine determination of the reserve‐potassium (reserve‐K) level of soil — i.e., K which is plant‐available but not exchangeable to 1 M ammonium acetate. The method is simple, relatively quick, and uses 2 g soil and 20 ml 0.03M sodium tetraphenylboro…
The presence of radial-axial hydride in pressure tubes in CANDU reactors is to be avoided since it can result in significant reductions in fracture toughness. Fabrication procedures produce tubes which have little radial-axial hydride when hydrided without stress. A quantitative technique for evaluating the susceptibi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of metal ions with humic acid-like models. Part 4. Synthesis, spectral properties, and crystal and molecular structure of tetrakis(.mu.-2,6-dimethoxybenzoato)diaquadicopper(II) and of bis(.mu.-2,6-dimethoxybenzoato)bis(.mu.-acetato)diaquadicopper(II), a case of a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAliphatic semidiones. 44. Spin probes derived from dithiolsGlen A. Russell, W. C. Law, and Mary ZaletaCite this: J. Am. Chem. Soc. 1985, 107, 14, 4175–4182Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://…
Abstract The last comprehensive review of tire-cord adhesion to rubber was reported by T. Takeyama and J. Matsui in Rubber Reviews for 1969. They covered this subject in depth from its scientific beginnings and dealt mostly with rayon, nylon, and polyester tire-cord adhesion. The objective of this present review will…
Time domain fluorescence spectrometry offers a versatile and powerful approach to the analysis of heterogeneous emitting systems. In this paper we describe a new approach, based on software, to the acquisition of phase and modulation resolved spectra. Mixtures of fluorophores with different lifetimes can be analyzed i…
Abstract The reaction of pyromellitic dianhydride (PMDA) and aromatic diamine in an aprotic solvent such as dimethylacetamide (DMAc) gives a solution of poly(amic acid). The effects of certain variables on the polymerization and some additives on the stability and imidization of the poly(amic acid)s were studied. It w…