Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew mixed organic-inorganic polymers: hydrolysis and polycondensation of bis(trimethoxysilyl)organometallic precursorsRobert J. P. Corriu, Joel J. E. Moreau, Philippe Thepot, and Michel Wong Chi ManCite this: Chem. Mater. 1992, 4, 6, 1217–1224Publication Date (Print):Novembe…
In Escherichia coli high-level production of some heterologous proteins (specifically, human prorenin, renin, and bovine insulin-like growth factor 2) resulted in the induction of two new E. coli heat shock proteins, both of which have molecular masses of 16 kDa and are tightly associated with inclusion bodies formed…
In this review, we have summarized the general structural features of the catalytic subunit of cAMP-dependent protein kinase, emphasizing those features that will very likely be conserved in all members of the protein kinase family. The overall secondary structure of the catalytic core will probably be conserved throu…
The sources of an absorption band at \ensuremath{\sim}5 eV observed in ${\mathrm{SiO}}_{2}$:${\mathrm{GeO}}_{2}$ and ${\mathrm{GeO}}_{2}$ glasses have not been unambiguously identified. Results reported here are consistent with the source of two types of neutral oxygen vacancies. Samples of ${95\mathrm{S}\mathrm{i}\ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemoval of nitrogen monoxide through a novel catalytic process. 2. Infrared study on surface reaction of nitrogen monoxide adsorbed on copper ion-exchanged ZSM-5 zeolitesMasakazu Iwamoto, Hidenori Yahiro, Noritaka Mizuno, Wen Xiang Zhang, Yoshihiro Mine, Hiroshi Furukawa, an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-TC molecular-based magnets: a ferromagnetic bimetallic chromium(III)-nickel(II) cyanide with TC = 90 KV. Gadet, T. Mallah, I. Castro, M. Verdaguer, and P. VeilletCite this: J. Am. Chem. Soc. 1992, 114, 23, 9213–9214Publication Date (Print):November 1, 1992Publication Hi…
Reduction of model bias in macromolecular crystallography through various omit-map techniques has been investigated. The two cases studied were the p21 protein complexed with GDP at 2.25 Å resolution and the AN02 Fab fragment of an anti-dinitrophenyl-spin-label murine monoclonal antibody complexed with its hapten at 2…
Abstract A plant for Selective Non‐catalytic Reduction (SNR) of NO x emissions by NH 3 (ammonia) injection has been designed, installed and successfully tested on a 135 MW e coal‐fired utility boiler. The final 2000 hours test was performed with the plant automatically controlled. The NO x level in the untreated flue…
SUMMARY Fuels, metals and non-metallic rocks and minerals have all contributed to the wealth of the United Kingdom, though in different proportions during different periods of history. Statistical returns show the very low level of metal production, and a waning production and value of all types of fuel at the present…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompression-molded polyurethane block copolymers. 2. Evaluation of microphase compositionsJeffrey T. Koberstein and Louis M. LeungCite this: Macromolecules 1992, 25, 23, 6205–6213Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published…
Site-directed mutagenesis was used to examine the catalytic importance of 2 histidine and 4 arginine residues in Escherichia coli periplasmic acid phosphatase (EcAP). The residues that were selected as targets for mutagenesis were those that were also conserved in a number of high molecular weight acid phosphatases fr…
Up to now, the positive lead dioxide active mass (PAM) has been treated as a crystal system. Its behavior, however, could not be fully explained by its crystal nature. In the present paper, a new approach is suggested which views PAM as a gel‐crystal system. Crystal zones are built of and exhibit electron conductivity…
Dynamic light scattering from polymer gels is complicated by the fact that the scattering intensity and its time correlation function change as different parts of a sample are explored. This results from the nonergodicity of the sample---time averages are not the same as ensemble averages, the result of a finite rigid…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio study of superalkalis. First ionization potentials and thermodynamic stabilityEva Rehm, Alexander I. Boldyrev, and Paul v R. SchleyerCite this: Inorg. Chem. 1992, 31, 23, 4834–4842Publication Date (Print):November 1, 1992Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPenicillin sensor based on a microarray electrode coated with pH-responsive polypyrroleMatsuhiko. Nishizawa, Tomokazu. Matsue, and Isamu. UchidaCite this: Anal. Chem. 1992, 64, 21, 2642–2644Publication Date (Print):November 1, 1992Publication History Published online1 May 20…
The flame retardant mechanism described for phosphorus- containing flame retardants includes both a condensed and a vapor phase mechanism depending on the type of phosphorus compound and the polymer. Intumescence is also described. Chemical structures of the flame retardant are shown. Specific applications for red pho…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure/properties of conjugated conductive polymers. 1. Neutral poly(3-alkythiophene)sShow An Chen and Jui Ming NiCite this: Macromolecules 1992, 25, 23, 6081–6089Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 No…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompression-molded polyurethane block copolymers. 1. Microdomain morphology and thermomechanical propertiesJ. T. Koberstein, A. F. Galambos, and L. M. LeungCite this: Macromolecules 1992, 25, 23, 6195–6204Publication Date (Print):November 1, 1992Publication History Published…
Calorimetric measurements of the glass transition are presented for metallic glasses, ${\mathrm{B}}_{2}$${\mathrm{O}}_{3}$, and organic polymers with cooling and heating rates ranging over more than three orders of magnitude. Fits of the onset temperatures of the glass transition to a Vogel-Fulcher-type equation give…
Semiconductor films with small crystal size normally exhibit prohibitively large recombination losses in photovoltaic cells. We show that porous nanocrystalline films of CdS and CdSe can be used as photoelectrodes in photoelectrochemical cells with relatively low recombination losses. Spectral response measurements sh…