Materials Literature
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A magnetic field suppresses turbulence and thermal convection in a Czochralski crystal puller. The amounts and distributions of dopants and oxygen in the crystal are determined by the motion of the molten silicon during crystal growth. This paper presents analytical solutions for the melt motion in a Czochralski pulle…
Mutual orientation effects on the rate of nonadiabatic electron transfer between several diporphyrin pairs of experimental \ninterest are examined. The electronic matrix element for electron transfer is calculated within a one-electron spheroidal \nmodel for a variety of states and orientations which are relev…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWet oxidation of poly(ethylene glycol) catalyzed by manganese-cerium composite oxideSeiichiro Imamura, Minoru Nakamura, Nariyoshi Kawabata, Junichi Yoshida, and Shingo IshidaCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 1, 34–37Publication Date (Print):March 1, 1986Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreferred orientation of imidazole ligands in metalloporphyrinsW. Robert. Scheidt and Daniel M. ChipmanCite this: J. Am. Chem. Soc. 1986, 108, 6, 1163–1167Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https:…
Unlike the orthorhombic phase, the icosahedral phase of ${\mathrm{Al}}_{86}$${\mathrm{Mn}}_{14}$ exhibits a local magnetic moment. The effective moment of icosahedral-phase Al-Mn and Al-Si-Mn alloys increases with Mn concentration up to a maximum of (1.5\ifmmode\pm\else\textpm\fi{}0.5${\ensuremath{\mu}}_{B}$). The amo…
In a prospective, randomized, double-blind study, 49 patients underwent lumbar myelography using iotrol (24 patients) or metrizamide (25 patients). The diagnostic imaging adequacy of iotrol was comparable with that of metrizamide. After iotrol myelography, adverse reactions were fewer, less severe, and of shorter dura…
This paper presents experimental observations of the effects of dissolved oxygen, hydrogen peroxide, and water purity (primarily dilute sulfuric acid) on the intergranular stress corrosion cracking (IGSCC) of weld-sensitized AISI 304 stainless steel (SS). This study used a complex experimental system in which temperat…
Abstract Ferrierite has been found at Tapu, Coromandel Peninsula, New Zealand, as a mineral vein with calcite in altered hornblende andesite lava of the Miocene Beeson's Island Volcanics. The ferrierite is low in SiO 2 (63.67%) and high in Al 2 O 3 (13.75%), MgO (3.48%), and BaO(2.35%). The large a axis and cell volum…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChange in radius of gyration of semicrystalline polymers upon crystallizationMarc L. MansfieldCite this: Macromolecules 1986, 19, 3, 851–854Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https://doi.org/10.10…
Abstract Mathematical models of kinetically controlled random copolymerizations with intramolecular reactions have been developed for A 2 + B 2 and A 3 + B 2 type reactions, in which the B 2 monomer is long and flexible enough to have a Gaussian end‐to‐end distance. Concentrations of different molecular species are ca…
The Sludge-to-Oil Reactor System (STORS) continuously converted over 400 gallons (20% solids) of sewage sludge to oil during 100 hours of operation. About 80% of the energy in the sludge was recovered as an oil and char. The energy recovered was sufficient to make the STORS energy self-sufficient assuming the char is…
Using X-ray diffraction methods it has been ascertained that the intermediate phase in Sn2P2Se6 crystals existing in the range 193 K to 220 K and preceding the ferroelectric transition at 193 K is an incommensurate phase. Modulated structure is characterized by the wave vector q(T) = (-1.146 δ(T)a*, 0, δ(T)c*), where…
This paper describes the effect of silicon additions to an 18Cr-8Ni stainless steel (SS) on the resistance to pit initiation in halide media. Electrochemical polarization measurements conducted in aerated 3.5 wt% sodium chloride at 25 C indicate a progressive increase in the critical breakdown potential (Ec) for 18Cr-…
The different species formed when gaseous formaldehyde is dissolved in aqueous medium are investigated by a 13 C NMR flow-through technique and the spectra of commercial aqueous formaldehyde solutions containing methanol completely interpreted. 13 CH 2 O was used to study the crosslinking reaction with gelatin which…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal degradation of aromatic-aliphatic polyethers. 1. Direct pyrolysis-mass spectrometryG. Montaudo, C. Puglisi, E. Scamporrino, and D. VitaliniCite this: Macromolecules 1986, 19, 3, 870–882Publication Date (Print):March 1, 1986Publication History Published online1 May 20…
Abstract This paper presents some experimental data on inverse relaxation exhibited by yarns spun from cotton, polyester, viscose rayon, and jute fibers. Inverse relaxation (IR) is the building up of tension in a viscoelastic material that has been allowed to recover a part of the initial extension it is subjected to.…
The physical and chemical properties of carbon films, about 0.5 mu thick, deposited at low temperature (40-200 degrees C) by a new physical vapour deposition technique are presented, in comparison with those of pyrolytic carbon normally used in biomedical devices. Several analytical techniques have revealed that the t…
Two new C21 steroidal constituents, named otophylloside A(IV) and otophylloside B(V), have been isolated from the roots of Cynanchum otophyllum Schneid, whose structures have been analysed in this paper by using X-ray crystallography and spectrometric data (UV, IR, 1H- and 13C-NMR, MS) and chemical reaction. They were…
The absorptive capacities of 4 commercially available tear test strips were determined and compared with 5-mm X 40-mm strips of #41 filter paper. Significant differences in the absorption of water over a given time interval were found in 3 of the groups tested. Major inconsistencies were found only within 1 lot of tea…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadical mechanism for the decomposition of diethyl[2,3,7,8,12,13,17,18-octaethylporphyrinato(2-)]ruthenium. Determination of the metal-carbon bond dissociation energyJames P. Collman, Lisa. McElwee-White, Penelope J. Brothers, and E. RoseCite this: J. Am. Chem. Soc. 1986, 10…