Materials Literature
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The need for improved coatings on low‐density reusable surface insulation (RSI) materials used on the space shuttle has stimulated research into developing tougher coatings. The processing of a new porous composite “coating” for RSI called toughened unipiece fibrous insulation is diseassed. Characteristics including p…
A bacterial strain, Pseudomonas sp. strain NK87, that can use 6-aminohexanoate-cyclic dimer as the sole source of carbon and nitrogen was newly isolated from wastewater of a factory which produces nylon-6. Two responsible enzymes, 6-aminohexanoate-cyclic-dimer hydrolase (P-EI) and 6-aminohexanoate-dimer hydrolase (P-E…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of polynitrocyclobutane derivativesT. G. Archibald, L. C. Garver, K. Baum, and M. C. CohenCite this: J. Org. Chem. 1989, 54, 12, 2869–2873Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https://pubs.ac…
The transition of copper oxide thin films from CuO to ${\mathrm{Cu}}_{2}$O during vacuum annealing has been studied by transmission electron microscopy and Rutherford backscattering spectroscopy. Dark field images show that isolated and large ${\mathrm{Cu}}_{2}$O grains emerge from the small CuO grain matrix. The abru…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of the iron(III)-catalyzed autoxidation of sulfur(IV) oxides in aqueous solution. 2. Decomposition of transient iron(III)-sulfur(IV) complexesJochen Kraft and Rudi Van EldikCite this: Inorg. Chem. 1989, 28, 12, 2306–2312Publication Date (Print):June 1,…
We discuss theoretically the possibility of a spontaneous nematic splay phase for polar nematogens. This novel liquid crystal phase is similar to the cholesteric phase for chiral nematogens (spontaneous twist), since it is spatially inhomogeneous and breaks translational symmetry, and to the cholesteric blue phases, s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoreactivity of .sigma.-bonded metalloporphyrins. 2. Germanium porphyrin complexes with .sigma.-bonded alkyl, aryl, or ferrocenyl groups. Intramolecular quenching of porphyrin excited triplet states by linked ferroceneG. B. Maiya, J. M. Barbe, and K. M. KadishCite this: I…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR study of manganese(II) and copper(II) in single crystals of the spin-crossover complex hexakis(1-propyltetrazole)iron(2+) tetrafluoroborate(1-)A. Ozarowski and B. R. McGarveyCite this: Inorg. Chem. 1989, 28, 12, 2262–2266Publication Date (Print):June 1, 1989Publication H…
Abstract This study examined the moisture absorption and other properties of nylon‐6,6 as a function of mold temperature and annealing effects. Moisture absorption was seen to decrease as the temperature of molding and annealing increased with a predictable effect on mechanical and thermal properties: namely, increase…
The vacancy diffusion flux, driven by the neck growth curvature (1 /ρ) which contributes to conventional sintering of a powder compact, is theoretically compared with that arising from thermal diffusion, driven by the temperature gradient (grad T/T) during the final stage of sintering. Under conditions experienced in…
The improvement of charge storage with annealing, the use of different cooling rates, and stretching in polypropylene (PP) and polyethylene (PE) is discussed. In annealed PP and PE storage increases linearly with both crystallinity and crystallite size. The half-value charge decay temperature can be used as a measure…
Abstract Al-rich di, trioctahedral chlorite exists as the species cookeite and sudoite. Di,dioctahedral chlorite exists as the species donbassite. Cookeite has essential Li in its structure, sudoite has essential Mg, and donbassite has only small amounts of either element. To date, sudoite has been reported to have on…
An equation for the half width of an adiabatic shear band formed under combined stresses is derived. The importance of strain rate, stress, temperature rise, and thermal conductivity is described. Confirmation is found for the proposition that shear band width is independent of stress state and this is confirmed by co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic quenching of the metal-to-ligand charge-transfer excited state of Cu4I4(pyridine)4. Exciplex formation and self-quenchingKevin R. Kyle and Peter C. FordCite this: J. Am. Chem. Soc. 1989, 111, 13, 5005–5006Publication Date (Print):June 1, 1989Publication History Publi…
Optical and electro-optic properties of two highly conjugated diphenyldiacetylenic liquid crystals (LCs) [1.4-bis-(4-propylphenyl)-butadiyne, abbreviated as PTTP-mm] and their eutectic mixture were characterized in the nematic range. These LCs are found to exhibit extraordinarily high birefringence and very low viscoe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray diffraction study of calcium(II) chloride hydrate melts: CaCl2.cntdot.RH2O (R = 4.0, 5.6, 6.0, and 8.6)Toshio Yamaguchi, Shunichi Hayashi, and Hitoshi OhtakiCite this: Inorg. Chem. 1989, 28, 12, 2434–2439Publication Date (Print):June 1, 1989Publication History Publishe…
Submicrometer SiO 2 ‐Al 2 O 3 powders with compositions of 46.5 to 76.6 wt% Al 2 O 3 were prepared by hydrolysis of mixed alkoxides. Phase change, mullite composition, and particle size of powders with heating were analyzed by DTA, XRD, IR, BET, and TEM. As‐produced amorphous powders partially transformed to mullite a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of pressure on the solubilities of benzene and alkylbenzenes in waterSeiji Sawamura, Kiyoshi Kitamura, and Yoshihiro TaniguchiCite this: J. Phys. Chem. 1989, 93, 12, 4931–4935Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published…
Daniels and Skyrme (1985) derived the joint distribution of the maximum, and the time at which it is attained, of a Brownian path superimposed on a parabolic curve near its maximum. In the present paper the results are extended to include Gaussian processes which behave locally like Brownian motion, or a process trans…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of the iron(III)-catalyzed autoxidation of sulfur(IV) oxides in aqueous solution. 1. Formation of transient iron(III)-sulfur(IV) complexesJochen Kraft and Rudi Van EldikCite this: Inorg. Chem. 1989, 28, 12, 2297–2305Publication Date (Print):June 1, 198…