Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Photoelectrochemical polymerization of pyrrole occurs at irradiated areas of semiconducting electrodes in aqueous solution of pyrrole. Organic conducting polypyrrole patterns were formed on semiconductors by area-selective irradiation of the semiconductor electrodes. The deposition rate was 0.5–0.7 μm per 100…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic, regiospecific guest binding by transition-metal host complexes having permanent voids as revealed by FT-NMR relaxation studiesThomas J. Meade, Whei Lu. Kwik, Norman. Herron, Nathaniel W. Alcock, and Daryle H. BuschCite this: J. Am. Chem. Soc. 1986, 108, 8, 1954–…
High-resolution heat capacity measurements have been carried out in the smectic-A--hexatic-B--crystal-B transitions of the compound 4-propionyl-4'-(n-heptanoyloxy)azobenzene. Qualitatively, the heat-capacity anomalies of this smectic-A--hexatic-B--crystal-B transition sequence mimic those of the smectic-C--smectic-I--…
The equations of Dill for bleaching of photoactive compound in positive photoresists have been solved analytically in closed form. As an application, the contrast γ, has been evaluated explicitly in the absence of reflection from the substrate.
Two new techniques for determining the emissivity, reflectivity and transmissivity of fabrics in the infra-red region of the spectrum are described and experimental results reported. Results obtained by both techniques compared favourably. The thermal radiative properties of many textile fabrics were found to be somew…
A model is developed for the thermally activated motion of 1/2〈110〉 superpartial dislocations on {010} planes and 1/3〈112〉 superpartials on {111} planes, when antiphase boundaries on {111} planes are unstable. These two superpartials are sessile because they have non-planar cores. The model is based on Duesbery′s mode…
We analyze the thermodynamic properties of the metal-insulator transitions at nonzero temperature in the paramagnetic phase, within a model proposed recently. The correlated motion of electrons is expressed through a band narrowing \ensuremath{\Phi} which reflects a restricted hopping of electrons due to on-site Coulo…
Abstract The Nriagu polymer model of 2:1 layer type clay minerals develops from the premise that clay minerals are condensation copolymers of solid hydroxides. In the Mattigod-Sposito formulation of the model, standard state chemical potentials (standard Gibbs energies of formation from the elements) of 2:1 clay miner…
Liquid–solid and solid–state phase equilibria have been studied in the Ni–NiAl–Ni3Ta triangle of the Ni–AI–Ta system, using a combination of several experimental techniques. Five primary phases occur in this region, including the ternary compound, π, Ni6TaAI, which enters into equilibrium with each of the other four.…
The main problem to be solved before advanced engineering ceramics can become industrial reality is that components having reliable and consistent properties cannot be made, and rejection rates can be as high as 95%, in stark contrast to the situation with metals and polymers. This results from the small size of defec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding mode of axial thiocyanate ligands of iron macrocyclic complexes. Crystal structure of [Fe(TIM)(SCN)2]PF6M. J. Maroney, E. O. Fey, D. A. Baldwin, R. E. Stenkamp, L. H. Jensen, and N. J. RoseCite this: Inorg. Chem. 1986, 25, 9, 1409–1414Publication Date (Print):April 1…
High-density ThO2-2% UO2 (233U) pellets are a strong candidate fuel for advanced pressurized heavy water reactors. A process flow sheet based on sol-gel microsphere pelletization has been developed for the first time for fabrication of high-density mixed-oxide pellets at relatively low compaction pressures (350 MPa) a…
Abstract New nickel(II) and palladium(II) complexes having both hydrido and arylthiolato ligands, MH(SAr)(PCy3)2, and complexes with aryl and mercapto ligands, Ni(Ar)(SH)(PEt3)2 (M = Ni, Pd; Ar = C6H5-,p-CH3-C6H4-, p-CH3OC6H4-), were prepared. Thermolysis of these complexes caused cleavage of the S–C or S–H bond to ev…
Abstract The effects of selected cationic and anionic impurities on the precipitation of gypsum in aqueous brine have been studied in a continuous MSMPR crystalliser. Crystal size distributions, determined by in situ Malvern laser light‐scattering measurements, were found to be bimodal. The suspected presence of agglo…
Equilibrium sorption of cadmium and copper ions by modified and unmodified maize stalk was studied using a range of metal-ion concentrations and temperatures at various metal ion-substrate contact periods. The amount of metal ion removed from solution depended on the metal ion concentration, the metal ion-substrate co…
Abstract Graft copolymers of acrylonitrile and of acrylic acid monomers on cellulosic materials were obtained by use of ceric ion initiator in aqueous medium at a 50% (w/w) cellulose‐monomer ratio. The variations of poly(acrylonitrile) grafts and of the efficiency of grafting with ceric ion concentration, and of poly(…
The plastic deformation around spherical indentations on a {100} face of single crystals of MgO has been studied with cathodoluminescence in a scanning electron microscope and by optical interferometry. Bd on the experimental observations, a model is presented which relates the movement of the displaced material, the…
The surfaces of cells of several species of cyanobacteria have been studied using low-temperature scanning electron microscopy (SEM), and have been shown to be covered in a layer of hydrated mucilage. This mucilage is observed in specimens of Anabaena azollae adhering to plant cells in their natural symbiotic niche (t…
Abstract Polyethyloxazoline (PEO x ) blends with several other thermoplastic polymers were examined by differential scanning calorimetry (DSC) for miscibility. Styrene/acrylonitrile (SAN) copolymers having compositions in the range of about 20–40% acrylonitrile (AN) by weight were found to be miscible with PEO x where…
Incubation of the neutral metalloendopeptidase thermolysin at pH 7.2 in the presence of EDTA and/or low concentrations of calcium ions produces fast enzyme inactivation as a result of autolysis. The 'nicked' protein is a folded species composed of three tightly associated protein fragments. Dissociation of this comple…