Materials Literature
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Shake flask experiments showed that Pseudomonas oleovorans began to be growth inhibited at 4.65 g of sodium octanoate liter, with total inhibition at 6 g liter. In chemostat studies with 2 g of ammonium sulfate and 8 g of octanoate liter in the feed, the maximum specific growth rate was 0.51 h, and the maximum specifi…
One important issue for providing life extension to operating boiling water nuclear reactors (BWRs) is the control of stress corrosion cracking in all sections of the primary coolant circuit. This paper links experimental and theoretical methods that provide understanding and measurements of the critical parameter, th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSecond-order nonlinear optical poly(organophosphazenes): synthesis and nonlinear optical characterizationHarry R. Allcock, Alexa A. Dembek, Chulhee Kim, Robert L. S. Devine, Yongqiang Shi, William H. Steier, and Charles W. SpanglerCite this: Macromolecules 1991, 24, 5, 1000–…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscoelastic behavior of plasticized sulfonated polystyrene ionomersR. A. Weiss, J. J. Fitzgerald, and D. KimCite this: Macromolecules 1991, 24, 5, 1064–1070Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991http…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSite-selective oxygen exchange and substitution of organometallic groups in an amphiphilic quadruple-cubane-type cluster. Synthesis and molecular structure of [(MCp*)4V6O19] (M = rhodium, iridium)Yoshihito Hayashi, Yoshiki Ozawa, and Kiyoshi IsobeCite this: Inorg. Chem. 1991…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeptadentate ligands for the lanthanides. The first structurally characterized example of a lanthanide heptadentate ligand complex: [tris(3-aza-4-methyl-6-oxohept-4-en-1-yl)amine]ytterbium(III)David J. Berg, Steven J. Rettig, and Chris OrvigCite this: J. Am. Chem. Soc. 1991,…
The stability fields of two high‐pressure polymorphs of ZrO 2 (ortho I and ortho II) were determined by both calorimetry and phase equilibrium experiments. Enthalpies of transition were measured by transposed temperature drop calorimetry. The entropies of transition and slopes of phase boundaries were calculated using…
Abstract Aluminium alkoxides, such as Al(O i Pr) 3 or Et 3‐p Al(O (CH 2 ) 2 X) p with 1≤p≤3, are very effective in initiating the polymerization of lactones, e.g.ϵ ‐ca‐prolactone and δ ‐valerolactone, and lactides (D,L‐ or L,L‐ isomers). The ring‐opening polymerization proceeds through a “coordination‐insertion” mecha…
Three series of metal-free phthalocyanines with alkyl, alkoxy, and alkoxymethyl side groups have been studied with X-ray diffraction. The structure of the columnar mesophases was described as a two dimensional (pseudo) hexagonal packing of indefinitely long stacks of phthalocyanine molecules. From the slope of the squ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDisubstituted tungstosilicates. 2. .gamma.- and .beta.-isomers of tungstovanadosilicate, [SiV2W10O40]6-: syntheses and structure determinations by tungsten-183, vanadium-51 and silicon-29 NMR spectroscopyJacqueline Canny, Rene Thouvenot, Andre Teze, Gilbert Herve, Michele Le…
High-pressure X-ray powder diffraction has been performed on corundum-type αFe 2 O 3 (hematite) in the pressure range up to 65 GPa using synchrotron radiation and a diamond anvil cell. A structural phase transformation has been observed with a transition pressure of about 55 GPa. The high-pressure form of Fe 2 O 3 is…
Frequency dependent second hyperpolarizabilities of N2 and the prototype organic molecule trans-butadiene are reported using generalized time dependent Hartree–Fock (TDHF) theory for several frequencies of applied fields. A monotonic increase of the values (positive dispersion) is observed for every nonlinear optical…
Defects and impurities in diamond films grown by chemical vapor deposition (CVD) were analyzed by high-resolution cathodoluminescence (CL) spectroscopy and imaging in transmission electron microscopy (TEM). The combination of CL and TEM makes it possible to correlate the film microstructure with the electronic structu…
A variety of temperature dependences of helical pitch were found in ferroelectric SmC * and antiferroelectric SmC A * chiral smectic liquid crystals with large spontaneous polarization. In the vicinity of the transition temperatures of the materials showing the second-order SmA-SmC * or SmA-SmC A * phase transition, t…
Just like technical check valves, the function of mechanical heart valve prostheses may presumably also lead to cavitation effects during valve closure. Due to the waterhammer effect, cavitation may primarily occur in the mitral position leading to high mechanical loading of the valve itself and of corpuscular blood e…
Abstract Three bentonites, from Bavaria, Wyoming and Brazil, were separated into various fractions. The layer charge was determined by alkylammonium ion exchange and increases with particle size from 0·25 Eq/(Si, Al) 4 O 10 (<0·06 µ m) to 0·28 Eq/(Si, Al) 4 O 10 (1–10 µ m). The charge density corresponds to an inte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular engineering of liquid-crystal polymers by living polymerization. 3. Influence of molecular weight on the phase transitions of poly{8-[(4-cyano-4'-biphenyl)oxy]octyl vinyl ether} and of poly{6-[4-cyano-4'-biphenyl)oxy]hexyl vinyl ether}V. Percec and M. LeeCite this:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSecond-sphere coordination of transition-metal complexes by calix[4]arenesJerry L. Atwood, G. William Orr, Fumio Hamada, Rebecca L. Vincent, Simon G. Bott, and Kerry D. RobinsonCite this: J. Am. Chem. Soc. 1991, 113, 7, 2760–2761Publication Date (Print):March 1, 1991Publicat…
An experimental investigation has been performed of the Rayleigh linewing in glass-forming liquids in the temperature rangefrom the melting point down to the glass-transition point. The so-called boson peak is found to contribute substantially to the Rayleigh linewing, and to determine the spectral profile of the high…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteractions of nitric oxide and carbon monoxide with palladium and platinum atomsGregory W. Smith and Emily A. CarterCite this: J. Phys. Chem. 1991, 95, 6, 2327–2339Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March…