Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoracemization of optically active 1,1'-binaphthyl derivatives: light-initiated conversion of cholesteric to compensated nematic liquid crystalsMingbao Zhang and Gary B. SchusterCite this: J. Phys. Chem. 1992, 96, 7, 3063–3067Publication Date (Print):April 1, 1992Publicat…
Because of considerable interest at US EPA for the collection of polar organic compounds in stainless steel canisters, particularly for the Toxic Air Monitoring Site (TAMS) study, the stability of 10 selected polar organics in canisters was investigated and the results are described in this paper. The polar organic co…
The creation of nonthrombogenic synthetic surfaces is a major challenge in biomedical research. The feature that clearly distinguishes natural blood vessels from their artificial counterparts is the presence of endothelial cell lining that besides being nonthrombogenic is capable of repair and renewal. This study desc…
Abstract Stereoregular polyamides containing two chiral backbone carbons in the repeating unit were prepared by polycondensation of bis(pentachlorophenyl) 2,3‐O‐methylene‐ L ‐tartrate with 1,9 and 1,12‐alcanediamines activated as N,N′ ‐bis(trimethylsilyl) derivatives. The polymers were characterized by elemental analy…
EntF is the enzyme responsible for serine activation during the biosynthesis of enterobactin (a cyclic trimer of N-dihydroxybenzoyl serine) in Escherichia coli. EntF has been overexpressed and purified to > 90% homogeneity. The enzyme has been shown to complement the entF- MK1 strain in the synthesis of 2,3-dihydroxyb…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChains of centered metal clusters with a novel range of distortions: praseodymium ruthenium iodide (Pr3I3Ru), ruthenium yttrium iodide (Y3I3Ru), and iridium yttrium iodide (Y3I3Ir)Martin W. Payne, Peter K. Dorhout, Sung Jin Kim, Timothy R. Hughbanks, and John D. CorbettCite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium constants and predictions of miscibility windows and maps for polymer blends involving p-(hexafluoro-2-hydroxy-2-propyl)styrene with methacrylate and acetoxy groupsXiaoming Yang, Paul C. Painter, Michael M. Coleman, Eli M. Pearce, and T. K. KweiCite this: Macromo…
The photoirradiation effect on photoluminescence (PL) from anodized porous silicons was studied. Although PL from Si anodized in artificial light decreased with photoirradiation, PL from Si anodized in the dark was found to increase with photoirradiation in air. The main factor for the photoirradiation effect was attr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and x-ray crystal structure of potassium tetrakis(2,6-diisopropoxyphenolato)neodymate(1-): a one-dimensional chain of lanthanide aryloxide anions joined by bis(.eta.6-arene)-potassium interactionsDavid L. Clark, John G. Watkin, and John C. HuffmanCite this: Inorg…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRecombination luminescence quenching of nonstoichiometric cadmium sulfide clusters by ZnTPPJ. ChrysochoosCite this: J. Phys. Chem. 1992, 96, 7, 2868–2873Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April 1992https://…
The amino acid sequence of the iron-sulfur-flavoprotein, trimethylamine dehydrogenase, isolated from the bacterium W3A1 has been deduced from the x-ray diffraction pattern obtained at 2.4-A resolution. This sequence has been compared to portions of the primary sequence derived by gas-phase sequencing of isolated pepti…
With a 90° twist between the two halves, dication 12+ is the first ethylene dication with the maximum distortion possible. The stabilization of the positive charge is achieved in the separate halves of the dication by delocalization over polymethine units. 12+, whose ClO salt melts at about 170°C with decomposition, i…
Reactions of hydrogen with 1,2-dichloroethane and trichloroethylene have been investigated over Rh/Si0 2 catalysts at 365-553K and 0.1 MPa. The major products of the reactions are HCl and C 2 H 6. The selectivity for C 2 H 6 increases with increasing temperature. C 2 HC 5 Cl is a minor product for the dichloroethane r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlassy relaxation at polymer-solid interfacesArup K. Chakraborty and Paul M. AdrianiCite this: Macromolecules 1992, 25, 9, 2470–2473Publication Date (Print):April 27, 1992Publication History Published online1 May 2002Published inissue 27 April 1992https://doi.org/10.1021/ma0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the mesomorphic form of poly(ethylene terephthalate)Finizia Auriemma, Paolo Corradini, Claudio De Rosa, Gaetano Guerra, Vittorio Petraccone, Riccardo Bianchi, and Gabriele Di DinoCite this: Macromolecules 1992, 25, 9, 2490–2497Publication Date (Print):April 27, 1992Public…
The optical and electrochemical properties of three cadmium benzenethiolate clusters, Cd(SPh)4 2-, Cd4(SPh)10 2-, and Cd10 $4(SPh)16 4-, are studied as function of the cluster size. The Cdn clusters (n = 1,4, 10) which may represent molecular models for the semiconductor CdS show structured absorption spectra that are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemically reactive polymers. Synthesis, characterization, and photochemistry of a polyurea containing a Cp2Mo2(CO)6 molecule along the polymer backbone and of poly(ether urethane) copolymers with Cp2Mo2(CO)6 and Cp2Fe2(CO)4 molecules along the polymer backboneSteve C.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMesophase behavior in thermotropic polyethers based on the semi-flexible mesogen 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethaneMichael A. Yandrasits, Stephen Z. D. Cheng, Anqiu Zhang, Jinlong Cheng, Bernhard Wunderlich, and Virgil PercecCite this: Macromolecules 1992…
The NAD(+)-dependent D-lactate dehydrogenase was purified to apparent homogeneity from Lactobacillus bulgaricus and its complete amino acid sequence determined. Two gaps in the polypeptide chain (10 residues) were filled by the deduced amino acid sequence of the polymerase chain reaction amplified D-lactate dehydrogen…