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。
The orientational distribution function f relative to the director of elongated molecules of liquid crystals and related materials can be determined, in principle, from the intensity distribution I along equatorial arcs in the x-ray-diffraction pattern. The integral equation relating these two quantities is solved her…
The cubic ( c ‐ZrO 2 ) and tetragonal zirconia ( t ‐ZrO 2 ) phase stability regions in the system ZrO 2 –Y 2 O 3 –Ta 2 O 5 were delineated. The c ‐ZrO 2 solid solutions are formed with the fluorite structure. The t ‐ZrO 2 solid solutions having a c/a axial ratio (tetragonality) smaller than 1.0203 display high fractur…
Communication: The high substituent sensitivity of the electrical conductivity of copper DCNQI radical anion salts (see figure) is atributed to the fact that the stacks of copper atoms and bridging DCNQI ligands are covalently clamped together within the frame work of a sevenfold interpenetrating super diamond archite…
Peer reviewed: Yes
The motion of bubbles dispersed in a liquid when a small-amplitude oscillatory motion is imposed on the mixture is examined in the limit of small frequency and viscosity. Under these conditions, for bubbles with a stress-free surface, the motion can be described in terms of added mass and viscous force coefficients. F…
The electro-optic response of polymer dispersed liquid-crystal (PDLC) films is reported as a function of frequency and amplitude of the applied voltage and size of the LC droplets. We found that the threshold voltage is minimum and sharpest at frequencies near a few kHz. Visual and optical response studies show that t…
Abstract Mixed-layer clays of variable composition and structure occur in core samples from two drillholes (WK207 and WK210) drilled into the Te Mihi sector of the Wairakei geothermal field. These were identified by X-ray diffraction analysis of glycolated and oriented sample fractions at less than 2 μ m and less than…
The localization of the extracellular matrix glycoprotein laminin was studied using polyclonal anti-laminin antibodies. The laminin patterns of the basement membranes of the muscular epithelial sheath that envelops the ovariole were conspicuously different from those of the basement membrane of the follicular epitheli…
Anions as templates for “host” anions determine the shape of molecular cavities (cluster shells) which form from differently coupled tetragonal-pyramidal OVO4 building blocks. For example, in the case of the cluster anions [HV22O54(ClO4)]6− and [H2V18O44(N3)]5− (depicted on the right) the construction of the cluster s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetrabutylammonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate as a noncoordinating electrolyte: reversible 1e- oxidations of ruthenocene, osmocene, and Rh2(TM4)42+ (TM4=2,5-diisocyano-2,5-dimethylhexane)Michael G. Hill, William M. Lamanna, and Kent R. MannCite this: Inor…
Within a mode-coupling approximation we investigate the influence of the short-time dynamics of colloidal fluids on the glass-transition scenario. We assume Brownian dynamics, neglect hydrodynamic interactions, and follow approximations used to construct a mode-coupling theory (MCT) for structural relaxation in dense…
The morphology of porous silicon formed on n‐type silicon by anodic dissolution in HF solution and its relation to the current‐potential characteristics are reported. An individual pore generally consists of three sections: a thin surface layer with pore size much smaller than in the bulk; an equidiameter main body; a…
This report informs fluid inclusion researchers of an extended equation to calculate wt% NaCl from final CO2-clathrate melting temperatures in H2O-CO2-NaCl fluid inclusions. This equation is valid only if melting occurs in the presence of CO2-liquid, CO2-vapor, and salt solution. Previous workers used the equation of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and size control of polystyrene latices via polymerization in microemulsionMarkus Antonietti, Wolfgang Bremser, Dorothea Mueschenborn, Christine Rosenauer, Beate Schupp, and Manfred SchmidtCite this: Macromolecules 1991, 24, 25, 6636–6643Publication Date (Print):De…
The gene encoding for an extremely thermostable oligo-1,6-glucosidase from Bacillus thermoglucosidasius KP1006 (DSM2542, obligate thermophile) was sequenced. The amino acid sequence deduced from the nucleotide sequence of the gene (1686 base pairs) corresponded to a protein of 562 amino acid residues with a Mr of 66,5…
Abstract A new experimental technique for studying the dynamics of bubble growth in thermoplastics using scanning electron microscopy is developed. The influence of temperature, saturation pressure, molecular weight, and the nature of physical blowing agent are investigated. The experimental results show that, the abo…
Conventionally batched varistors in the ZnO–Co3O4–Pr6O11 system that were sintered at or above 1280 °C exhibited a sharp increase in the average breakdown voltage per grain boundary. In these samples, barrier heights and donor concentration values, derived from capacitance-voltage analysis, exhibited sharp changes at…
Abstract Silicon nitride is a ceramic material of great interest to advanced engine construction and mechanical engineering owing to an outstanding combination of favorable properties like high mechanical strength at high temperatures, corrosion and wear resistance, great hardness, and low density. The material is bas…
This review reports data on the general and renal tolerance of the paramagnetic contrast agent Gd-DTPA after intravenous administration. Gd-DTPA was administered usually at a dose level of 0.1-0.2 mmol/kg body wt (range: 0.005-0.25 mmol/kg body wt) in cranial, spinal and body MR indications. In phase I-IIIa studies a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of distillation compositions from multiple temperature measurements using partial-least-squares regressionThor Mejdell and Sigurd SkogestadCite this: Ind. Eng. Chem. Res. 1991, 30, 12, 2543–2555Publication Date (Print):December 1, 1991Publication History Published…