Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon-13 NMR of liquid crystals. Spinning near the magic angle with proton-proton dipolar decouplingB. M. Fung and Jalees. AfzalCite this: J. Am. Chem. Soc. 1986, 108, 5, 1107–1108Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure, reactivity, and electrochemistry of free-base .beta.-oxoporphyrins and metallo-.beta.-oxoporphyrinsAlan M. Stolzenberg, Paul A. Glazer, and Bruce M. FoxmanCite this: Inorg. Chem. 1986, 25, 7, 983–991Publication Date (Print):March 1, 1986Publication History Publish…
Characterization of the growth of a small patch of surface, e.g., the outer face of a growing cell during a fixed period of time, can take the form of a strain cross. The long arm of the cross shows the maximum relative extension in the patch. The length of the short arm indicates the minimum extension. With the conve…
The thermotropic phase transitions and the mesophase structure of two long-chain alkyl pyridinium halides are described. From small angle X-ray diffraction, optical microscopy, differential scanning calorimetry and dilatometry, the single liquid-crystalline phase found in each material is identified as smectic A. It i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrodynamics, enrichment, and collapse in foamsGanesan Narsimhan and Eli RuckensteinCite this: Langmuir 1986, 2, 2, 230–238Publication Date (Print):March 1, 1986Publication History Published online1 May 2002Published inissue 1 March 1986https://pubs.acs.org/doi/10.1021/la00…
Abstract (±)-1,2-Diphenylethylenediamine (DPEDA) was efficiently resolved by the fractional crystallization of its diastereomeric salts with optically active mandelic acid. 1H-NMR spectrum of N-monoacylated DPEDA with an optically active derivatizing agent showed that DPEDA thus obtained was optically pure.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry and spectroscopy of toluene-3,4-dithiol (TDTH2) and of its M(TDT)22-/- complexes with zinc(II), copper(II), nickel(II), cobalt(II), iron(II), and manganese(II). Formation of a stable dn-(.cntdot.SR) bond upon oxidation by one electronDonald T. Sawyer, G. Susa…
The structure, mechanism of formation and thermal reaction of electronic defects associated with Ge in GeO 2 -doped silica fiber induced by fiber-drawing or γ-irradiation were studied by detecting ESR hyperfine structures due to 73 Ge. The present assignment of the drawing-induced center to the Ge-E' center was confir…
The defect center causing the 2 eV absorption band induced in pure silica core fibers by 60 Co γ-rays is discussed. The 2 eV band and non-bridging oxygen hole center (NBOHC, SI–O·) show almost the same thermal annealing characteristics. The peak wavelength of the 2 eV band in low-OH (≦6 ppm) fibers is 630 nm, but shif…
The ferroelectric first order phase transition at 367 K has been discovered in TMACA crystals, which is presumably related to a motion of trimethylammonium cations.
The fracture toughness of fine‐grained undoped ZrO 2 ‐toughened Al 2 O 3 (ZTA) was essentially unchanged by postsintering hot isostatic pressing and increased monotonically with ZrO 2 additions up to 25 wt%. The strength of ZTA with 5 to 15 wt% tetragonal ZrO 2 , which depended monotonically on the amount of ZrO 2 pre…
Die Elemente Silicium und Kohlenstoff können als Repräsentanten von Materie und Leben auf dieser Erde betrachtet werden: Silicium spielt die Schlüsselrolle bei der „Petrikation”︁ unbelebter Materie, während Kohlenstoff die Grundlage für die „Inkarnation”︁ lebender Organismen bildet. Die Titelverbindungen und ihre Deri…
Abstract A study was made of the extent to which the lateral surfaces contribute to the surface area of five kaolinites of different crystallinities. Methods used included the low-temperature adsorption of N 2 and Ar as measured by a volumetric technique coupled with microcalorimetry, the interpretation of the adsorpt…
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…