Materials Literature
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The liquid wetting and retention properties of cotton, polyester, and their blends and other woven fabrics, each containing a single fiber type, were investigated using a previously established method. Several aspects of liquid retention properties of woven fabrics were discussed, i.e., distribution of liquid uptake,…
Poly-β-hydroxybutyrate (PBH) was recently shown to be produced in genetically engineered plants which expressed the genes from Alcaligenes eutrophus responsible for the formation of PHB from acetoacetyl-CoA. The transgenic plants accumulated PHB as granules which were similar in size and appearance to the bacterial PH…
The discovery of gold about 7000 years ago together with that of its sister metals from group IB of the periodic table can be said to have laid the early foundations of metallurgy as a science and a technology. The attraction of the metal to man derives from its relative scarcity and high value, its excellent corrosio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPrediction of the solubility of polar polymers by means of interfacial tension combining rulesC. J. Van Oss and R. J. GoodCite this: Langmuir 1992, 8, 12, 2877–2879Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 Dece…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics and photochemistry of 22.pi. and 26.pi. acetylene-cumulene porphyrinoidsDaniel O. Martire, Norbert Jux, Pedro F. Aramendia, R. Martin Negri, Johann Lex, Silvia E. Braslavsky, Kurt Schaffner, and Emanuel VogelCite this: J. Am. Chem. Soc. 1992, 114, 25, 9969–9978P…
A model for electron transport and emission in CsI is proposed. It is based on theoretically calculated microscopic cross sections for electron interaction with the nuclear and the electronic components of the solid. A Monte Carlo program based on this model was developed to simulate secondary electron emission induce…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTerminal and segmental relaxations in epoxidized polyisopreneC. M. RolandCite this: Macromolecules 1992, 25, 25, 7031–7036Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1021/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward a determination at near atomic resolution of two-dimensional crystal structures of amphiphilic molecules on the water surface: a study based on grazing incidence synchrotron x-ray diffraction and lattice energy calculationsFranck Leveiller, Didier Jacquemain, Leslie L…
Abstract Decomposition of complex X-ray diffraction profiles is used on well characterized (image analysis of transmission electron micrographs, X-ray fluorescence chemical analyses) diagenetic samples from the Paris basin. The simultaneous occurrence of three “illitic” phases (mixed-layer illite/smectite or I/S, poor…
Instrumental aspects of low-energy electron microscopy are reviewed with a view toward the future evolution of this reemergent technology. Both elastically scattered and inelastically excited electrons in the 0–1000-eV range may be used to form direct rather than scanned images of surfaces in the 3–10-nm resolution ra…
Nonresonant-type third-order nonlinearity of high refractive index PbO-TiO 2 -TeO 2 and Nb 2 O 5 -TiO 2 -TeO 2 glass has been evaluated by means of third-harmonic generation. The PbO-containing glass show higher χ (3) than Nb 2 O 5 -containing glass, and the largest χ (3) of 3.7×10 -12 esu is obtained for 10 mol%PbO-1…
The anaerobic ribonucleoside triphosphate reductase from Escherichia coli reduces CTP to dCTP in the presence of a second protein, named dA1, and a Chelex-treated boiled extract of the bacteria, named RT. The reaction requires S-adenosylmethionine, NADPH, dithiothreitol, ATP, and Mg2+ and K+ ions. It occurs only under…
Abstract Synthesis of the title compound (1), and its molecular structure determined by X-ray crystallographic analysis, and electrochemical property investigated by cyclic voltammetry are described. Several cation radical salts of 1 have been prepared by electrochemical oxidation method, and their electrical properti…
The relaxation behavior of a polymer blend, deutero-polystyrene and polyvinylmethylether (d-PS/PVME) was studied by investigating the equilibrium structure factor S(Q) and its time dependence S(Q,t) after the blend had been exposed to a rapid temperature step from T0 to Tf. The structure factor S(Q,t) was determined a…
The relationship between fatty acid metabolism and PHA biosynthesis in P. putida is described. Detailed 1H and 13C NMR studies were performed to investigate the structures of poly(3-hydroxyalkanoates) (PHAs) formed from carbohydrates and fatty acids. On the basis of these results, it is proposed that during growth on…
solidus in the KMASH system. It is possible to calculate tlire P-T location of this solidus as a function of anro using models for the interactions between HrO and aluminosilicate melts. Using available thermodynamic data, we can also calculate the shift of the subsolidus reaction Phl + Qtz : En * Sa + Fl as a functio…
Free-standing films of the liquid-crystal compound C7 [4-(3-methyl-2-chloropentanoyloxy)-4'-heptyloxybiphenyl], which possesses a first-order smectic-A--smectic-C transition, are studied. In various films with thicknesses between 2 and 27 molecular layers, the average tilt angle, i.e., the order parameter of the trans…
Adding aluminum titanate to alumina can result in dramatic improvements in toughness and R ‐curve properties. However, the improved toughness is offset by a significant reduction in strength at small flaw sizes. This problem can be overcome through the use of a laminated composite construction. By placing a thin layer…
Compounds with extremely branched molecular structures (for example 1) that are formed in iterative syntheses are penetrating many disciplines of chemistry. Compound 1 has 36 carboxyl groups on its periphery and can be considered a unimolecular micelle. Recently dendrimers have found their way into coordination chemis…
Countergravity, pressure-assisted infiltration with a 2014 Al alloy of suitably tamped porous compacts of platelet shaped single crystals of alpha (hexagonal) silicon carbide was used to measure particulate wettability and infiltration kinetics under dynamic conditions relevant to pressure casting of composites. A thr…