Materials Literature
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In the light of the solution of the three-dimensional structure of the NAD(+)-linked glutamate dehydrogenase from the mesophile Clostridium symbiosum, we have undertaken a detailed examination of the alignment of the sequences for the thermophilic glutamate dehydrogenases from Thermococcus litoralis and Pyrococcus fur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Decanuclear Manganese Cluster with Oxo and Halide Bridging Ligands: Magnetic Behavior of an S .gtoreq. 12 SystemDavid P. Goldberg, Andrea Caneschi, Christopher D. Delfs, Roberta Sessoli, and Stephen J. LippardCite this: J. Am. Chem. Soc. 1995, 117, 21, 5789–5800Publication…
It was shown recently that nanocrystalline diamond films can be grown using fullerenes as precursors in an argon microwave plasma without the addition of hydrogen or oxygen. Extensive fragmentation of C60 in the microwave discharge leads to a copious production of the carbon dimer molecule, C2, as evidenced by intense…
A novel system of non-symmetric dimers containing 4-n-alkyloxy-substituted cinnamic acid and cyanobiphenyl groups has been studied. Two series were prepared: in one the flexible spacer was varied in length while the spacer was fixed. The spacer length has a profound influence on the nematic-isotropic transition temper…
The corrosion behavior of copper with various organic inhibitors in aerated solutions at pH 1 to pH 2 was studied using a potentiostat. The inhibitors studied included benzotriazole (BTAH), hydroxy benzophenoximes, L-hydroxy-5-nonylacetonphenone oxime, and sodium octyl hydroxamate (SOH). BTAH was shown to be the most…
The concept of generating liquid crystalline polymer (LCP) reinforcing fibrils on an in situ basis has a number of potentially attractive advantages over the use of the more commonly used glass-reinforced composites. The potential advantages include a wider range of processing options, improved surface appearance, rec…
Single crystals of \ensuremath{\alpha}-${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$ were irradiated at Ganil with $^{238}\mathrm{U}$ ions using four different energies: 0.48, 1.72, 2.78, and 3.40 MeV/u. All the irradiations were performed at a temperature of \ensuremath{\approxeq}80 K, with fluences extending from 1.2\ifmmod…
This paper examines the surface-sediment diatom assemblages of 31 shallow, artificial, enriched ponds in southeast England lying along a total phosphorus (TP) gradient (annual mean TP 25-646 μg 1−1), with respect to their species composition, and the role of such waters in generating diatom-chemistry training sets for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNeutron Reflectivity and Structure of Polyether Dendrimers as Langmuir FilmsP. M. Saville, P. A. Reynolds, J. W. White, C. J. Hawker, J. M. J. Frechet, K. L. Wooley, J. Penfold, and J. R. P. WebsterCite this: J. Phys. Chem. 1995, 99, 20, 8283–8289Publication Date (Print):May…
The function of the polyhydroxyalkanoic acid (PHA) granule-associated GA14 protein of Rhodococcus ruber was investigated in Escherichia coli XL1-Blue, which coexpressed this protein with the polyhydroxybutyric acid (PHB) biosynthesis operon of Alcaligenes eutrophus. The GA14 protein had no influence on the biosynthesi…
Amorphous diamond films have been prepared by filtered cathodic arc deposition of carbon. The filtered arc is well suited for the growth of amorphous diamond, as it provides carbon ions with optimum kinetic energies at practical deposition rates. These films contain no hydrogen and are therefore structurally different…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBuilding of 2D Sheet of Tetrakis(methylthio)tetrathiafulvalenes Coordinating to Copper(I) Halides with Zigzag and Helical Frames and the 3D Network through the S.cntdot. .cntdot. .cntdot.S ContactsMegumu Munakata, Takayoshi Kuroda-Sowa, Masahiko Maekawa, Akihiro Hirota, and…
When Ag{111} is exposed to NO at 40 K, monolayer adsorption is followed by multilayer (NO)(2) formation. Heating to 60 K results in the desorption of the dimer multilayer, leaving a monolayer on the surface. Using isotopes, the monolayer has also been characterized as dimers, which have the N-N axis coplanar with the…
Abstract The mould release of nitrile butadiene rubber is strongly influenced by residues from the polymer and compounding ingredients that form an interfacial layer during moulding. Carboxylic acid residues may comprise an important part of this layer. There are two potential sources of these: emulsifier residues in…
The heat and mass transfer model developed in Part I has been further modified to evaluate the steaming of blended and interleaved fabric-wrapper assemblies. Various conditions relating to the batch decatizing of a wool fabric with a cotton, nylon, or polyester wrapper have been examined. Results of the computations s…
Measurements of dislocation resistivity and the deviations from Matthiessen's rule (DMRs) are reported for polycrystalline Cu samples with various dislocation densities, impurities and phonons. Since this DMR can reach the same order of magnitude as the dislocation resistivity itself, its quantification is essential i…
Abstract The behaviour of three typical thermoplastic polymers—polypropylene (PP), polyamide 6 (PA‐6), ABS and PP mixed with inert talc or fire retardant magnesium hydroxide or melamine—was assessed in the Cone Calorimeter and in traditional widely used tests. It is seen that the evaluation of the relative fire hazard…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect Synthesis of Binary K-.beta.- and K-.beta.''-Alumina. 1. Phase Relations and Influence of Precursor ChemistryArnoud P. de Kroon, Guenter W. Schaefer, and Fritz AldingerCite this: Chem. Mater. 1995, 7, 5, 878–887Publication Date (Print):May 1, 1995Publication History P…
A comparative study of the liquid crystal and ferroelectric properties of several achiral, racemic and non-racemic 2,6-naphthyl benzoates and their 1,4-phenyl benzoate analogues is reported. In terms of pure compounds, both central core structures give rise to similar mesophase sequences; however, the naphthalene deri…
Weathering of serpentinitic parent material, naturally rich in both Cr and Ni, provides soils that generally contain elevated concentrations of both metals. In this study, soil development as well as the fate of Cr and Ni in Dystric Eutrochrepts derived from serpentinitic rock slide material were investigated in the S…