Materials Literature
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Cast (unoriented) PAN films show equilibrium swelling corresponding to about 250-wt% gain in 0.4-molal aqueous potasium triiodide solution. In this “first-stage” swollen state, the film is still rigid and the swelling produces almost no increase in dimensions of the sample. In creep experiments carried out while immer…
Research Papers The History of Tribology in America D. Dowson D. Dowson Institute of Tribology, Department of Mechanical Engineering, The University of Leeds, Leeds, LS2 9JT, England Search for other works by this author on: This Site PubMed Google Scholar Author and Article Information D. Dowson Institute of Tribolog…
The effects of controlled porosity on the dielectric breakdown of sintered MgAl 2 O 4 were measured using an acoustic emission technique. Results are compared to a statistical model relating dielectric strength to a random distribution of spherical pores and the probability of pores aligned in a vertical column. Data…
Abstract Deconvolution of X-ray excited Mg Is photoelectron and Auger (KL23L23) electron spectra of Mg-montmorillonite into the spectra of the exchangeable and non-exchangeable skeletal magnesium of the clay revealed considerable difference in the electronic state for magnesium of the two origins. The chemical state o…
Tensile strength of specimens of coated fabric which had a crack, a bias crack and a circular defect respectively was measured using a uniaxial and using a biaxial tensile tester. Then, uniaxial and biaxial tensile strength figures were compared, and strengths for the three types of defect condition were compared. Fur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structures of the picoline N-oxide complexes M(4-CH3C5H4NO)6(ClO4)2 (M = copper,zinc) and EPR spectra of the pure and zinc-doped copper complexesJ. S. Wood, R. O. Day, C. P. Keijzers, E. De Boer, A. E. Yildirim, and A. A. K. KlaassenCite this: Inorg. Chem. 1981, 20,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcess simulation of ammonia plantChandra P. P. Singh and Deoki N. SarafCite this: Ind. Eng. Chem. Process Des. Dev. 1981, 20, 3, 425–433Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs.org/doi/…
ABSTRACT The purpose of this study was to quantify nucleic acids in bone marrow and to determine if nucleic acid levels in mechanically deboned meat (MDM) which contains marrow are high enough to be nutritionally hazardous. Bone marrow from cervical and lumbar vertebrae, MDM and longissimus muscle samples were analyze…
Breakdown of the thin air-formed oxide film is the first step in the corrosion of steel exposed to aqueous chloride environments. We studied oxide-film breakdown by observing changes, with time, of appearance, weight loss, and corrosion potential while varying the three components of the system: environment, substrate…
Abstract Reduction of acetylene to ethylene is catalyzed by [Fe4S4(SPh)4]n-([4-Fe]n-, n = 3, 4) or [Mo2Fe6S9(SPh)8]m- ([Mo–Fe]m-, m = 4, 5) produced by controlled potential electrolysis of [4-Fe]2− or [Mo-Fe]3− in MeOH/THF and in H2O. The catalytic activity increases in the order [Mo–Fe]4− << [4-Fe]3− ≅…
Abstract Self‐trapped hole (STH) and self‐trapped exciton (STE) states which are formed in Y 3 Al 5 O 12 , Y 2 SiO 5 , and TR 2 Si 2 O 7 crystals under γ‐irradiation in the temperature interval of 77 to 200 K are investigated. The STH is shown to be molecular O , absorbing at 1.6 eV (for Y 3 Al 5 O 12 ) and at 1.65 eV…
Stress corrosion cracking investigations on U-bend samples of sensitized 304 austenitic stainless steel have been conducted in sulfurous acid solutions in the concentration range, 0.40 to 10% at ambient temperatures. Samples were found to fracture in solutions of more than 3% sulfurous acid. Chemical analysis of solut…
Abstract In the course of our investigations of the ternary system Rb-Au-Sn we obtained the new compound Rb 4 Au 7 Sn 2 . Its crystal structure has been determined by single crystal X-ray diffraction data. It crystallizes in the hexagonal (rhombohedral) space group R3̄m with unit-cell parameters a = 680.1(3) pm and c…
Abstract To elucidate the compatibility of polymer and plasticizer components of binders a study of polymer–plasticizer interactions by differential scanning calorimetry (DSC) and swelling tests was conducted. The glass transition temperatures ( T g 's) of mixtures of polymers and plasticizers, both cured and uncured,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinuclear dicyclopentadienyltitanium(III) complexes: magnetic-exchange interactions propagated by the methylene groups of cyclic aliphatic dicarboxylic acid dianionsLinda Stecher Kramer, Arrietta W. Clauss, Lynn C. Francesconi, David R. Corbin, David N. Hendrickson, and Gale…
A quasisteady-gas-phase and thermally-thin-substrate model is used to analyze the transient behavior of catalytic monolith combustors in fuel-lean operation. The combustor response delay is due to the substrate thermal inertia. Fast response is found to be favored by thin substrate, short catalytic bed length, high co…
Abstract Four commercially established ferritic‐austenitic stainless steel grades have been investigated with respect to σ‐phase embrittlement by exposure in the temperature interval 700–900 °C. The results illustrate the fact that this type of steels is rather susceptible to such an embrittlement, and this has to be…
Polydichlorophosphazene (NPC12)X is unique as a synthetic precursor for poly(organo)phosphazenes [1–6] and presents special problems in polymerization studies because of branching, crosslinking, and cyclization reactions and in characterization due to the polymer's hydrolytic instability. This paper reviews the litera…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN-Methylprotoporphyrin IX. Identification by NMR of the nitrogen alkylated in each of the four isomersKent L. Kunze and Paul R. Ortiz de MontellanoCite this: J. Am. Chem. Soc. 1981, 103, 14, 4225–4230Publication Date (Print):July 1, 1981Publication History Published online1…
Abstract This review will be restricted to the applications of liquid polybutadienes (BR) which, as prepared, are devoid of functional groups other than the unsaturation left after polymerization. These products should not be confused with the so called telechelic BRs in which terminal functional groups are deliberate…