Materials Literature
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Abstract This study is based on the use of integral, hybrid thermal barrier to protect the core of the composite structure. Thermal barrier treatments evaluated in this study include ceramic fabric, ceramic coating, intumescent coating, hybrid of ceramic and intumescent coating, silicone foam, and phenolic skin. The c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, properties, and the ring-ring transformation reactions of cyclic siloxanes incorporating skeletal boron atoms: x-ray crystal structures of the strained boracyclotrisiloxane (PhBO)(Ph2SiO)2 and the boracyclotetrasiloxane (PhBO)(Ph2SiO)3Daniel A. Foucher, Alan J. Lo…
A 5417-base pair (bp) region of Pseudomonas aeruginosa PAO chromosomal DNA containing the mmsAB operon and an upstream regulatory gene (mmsR) has been cloned and characterized. The operon contains two structural genes involved in valine metabolism: mmsA, which encodes methylmalonate-semialdehyde dehydrogenase; and mms…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrothermal synthesis of a layered zinc molybdenum phosphate with octahedral and tetrahedral zinc: structure of (TMA)2(H3O)2[Zn3Mo12O30(HPO4)2(H2PO4)6].cntdot.11.5H2OLinda A. Mundi and Robert C. HaushalterCite this: Inorg. Chem. 1992, 31, 14, 3050–3053Publication Date (Prin…
Physical properties of the phenomena occurring in one-dimensional systems structure and properties of conducting organic crystals structure and properties of conducting polymers methods of obtaining low-dimensional organic conductors structure, properties and applications of heterogeneous organic molecules and molecul…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN-(tert-Butoxycarbonyl)-2-(tert-butyldimethylsiloxy)pyrrole: a promising compound for synthesis of chiral nonracemic hydroxylated pyrrolidine derivativesGiovanni Casiraghi, Gloria Rassu, Pietro Spanu, and Luigi PinnaCite this: J. Org. Chem. 1992, 57, 14, 3760–3763Publication…
ABSTRACT Citrus oil components (from cold‐pressed and terpeneless oils), which contribute substantially to flavor of orange juice, were shown to be absorbed into various polymeric materials [low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene (PP), and surlyn (S)] used in aseptic packaging…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiempirical calculations of hyperpolarizabilities for donor-acceptor molecules: comparison to experimentNobuyuki Matsuzawa and David A. DixonCite this: J. Phys. Chem. 1992, 96, 15, 6232–6241Publication Date (Print):July 1, 1992Publication History Published online1 May 2002…
Singlet oxygen (1O2) can react with cholesterol (Ch) to give three possible ene-addition hydroperoxides: 3 beta-hydroxy-5 alpha-cholest-6-ene-5-hydroperoxide (5 alpha-OOH), 3 beta-hydroxycholest-4-ene-6 alpha-hydroperoxide (6 alpha-OOH), and 3 beta-hydroxycholest-4-ene-6 beta-hydroperoxide (6 beta-OOH). The rates of d…
Spinodal decomposition of off-critical mixtures of poly(styrene–random–butadiene) copolymer with polyisoprene or polybutadiene was investigated as a function of the composition w of the mixtures and of the phase separation temperature T by time-resolved light scattering. The coarsening behavior of the mixtures was cha…
In this investigation quantitative texture analysis, including calculation of the orientation distribution function, is used to demonstrate the degree of preferred orientation in β ‐Si 3 N 4 which has been hot‐pressed or hot‐worked. The results indicate that plane strain compression can produce strong textures. The te…
Restriction mapping and sequence analysis of cosmid clones revealed a cluster of three cellobiohydrolase genes in Phanerochaete chrysosporium. P. chrysosporium cbh1-1 and cbh1-2 are separated by only 750 bp and are located approximately 14 kb upstream from a cellulase gene previously cloned from P. chrysosporium (P. S…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic studies of the molecular relaxations and interactions in microcomposites prepared by in-situ polymerization of silicon alkoxidesJohn J. Fitzgerald, Christine J. T. Landry, and John M. PochanCite this: Macromolecules 1992, 25, 14, 3715–3722Publication Date (Print):Jul…
A constant (N,P,T) statistical method is developed for a finite-size system. A scaling variable a is introduced to describe the size of the system following the method used for the bulk system. The histograms of the Boltzmann distribution function f(${\mathit{E}}_{\mathit{c}}$,V;T,P) (${\mathit{E}}_{\mathit{c}}$ and V…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMNDO study of boron-nitrogen analogs of buckminsterfullereneXinfu Xia, Daniel A. Jelski, James R. Bowser, and Thomas F. GeorgeCite this: J. Am. Chem. Soc. 1992, 114, 16, 6493–6496Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published ini…
Regulation of the procollagen type I (Pro alpha 1) gene in cultured Ito cells by diverse cytokines was studied. Specifically, we have examined the effect of interleukin-1 beta (IL-1 beta), tumor necrosis factor alpha (TNF alpha), and transforming growth factor beta (TGF beta) on collagen biosynthesis, levels of Pro al…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMc determination and molecular dynamics in crosslinked 1,4-cis-polybutadiene: a comparison of transversal proton and deuterium NMR relaxationG. Simon, K. Baumann, and W. GronskiCite this: Macromolecules 1992, 25, 14, 3624–3628Publication Date (Print):July 1, 1992Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGround spin state variability in manganese oxo aggregates. Demonstration of an S = 3/2 ground state for [Mn3O4(OH)(bpea)3](ClO4)3Samudranil Pal, Michael K. Chan, and William H. ArmstrongCite this: J. Am. Chem. Soc. 1992, 114, 16, 6398–6406Publication Date (Print):July 1, 199…
The Cu(II) sites of azurins, the blue single copper proteins, isolated from Pseudomonas aeruginosa and Alcaligenes spp. (Iwasaki) are reduced by CO2- radicals, produced by pulse radiolysis, in two distinct reaction steps: (i) a fast bimolecular phase, at the rates (5.0 +/- 0.8) x 10(8) M-1.s-1 (P. aeruginosa) and (6.0…
Porous layers formed in n-type silicon are characterized by pores of square cross section oriented perpendicular to the (100) plane. The pore walls are defined by the {011} planes in the [100] zone with secondary pores propagating from the main pores in the 〈010〉 and 〈001〉 directions. The pores are located in an array…