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 The percolation model is used to interpret the brittle‐ductile transition of HDPE/CaCO 3 blends. The percolation threshold (θ sc ) for HDPE/CaCO 3 blends is found to be 0.52, which is equal to π/6. The critical exponent ( g ) is found to be 0.83 for HDPE/CaCO 3 blends. The toughening efficiency of blends whic…
31 P Magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy of a series of Ca phosphate glasses yields the following results and conclusions: (1) The relative concentrations of Q1, Q2, and Q3 P-tetrahedra are consistent with theoretical expectation and previous experimental work, except that near the m…
The crystallization and transformation behavior of the polymorphs of L-histidine (A, B) and the transformation kinetics were investigated in aqueous solutions. Both polymorphs precipitate in almost the same ratio from solutions in a wide concentration range. The ratio of the polymorphs. in the precipitate was scarcely…
For pt.I see ibid., vol.8, no.1, p.246-54. Simulation data for the magnetizing inrush current generated by power transformers, obtained in part one, are used for harmonic analysis. The simulation results show very good agreement with experiment results. The relationship of the harmonics to all parameters is discussed.…
The effects of dissolved oxygen, hydrogen, and hydrogen peroxide on the corrosion (electrochemical) potentials (ECPs) of type 304 SS and alloy 182 in simulated boiling water reactor (BWR) coolant environments under various water chemistry conditions at 288°C are reported. In oxygenated systems, the measured ECP fell w…
The synthesis and solution redox properties of several covalently attached ferrocene and tetrathiafulvalene units are reported, together with the X-ray crystal structure of a 1,1′-bis(1,3-dithiole-2-ylidene)-substituted ferrocene derivative.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel polyoxo molybdenum(V) organophosphonate anion having a sandwich structure: synthesis and crystal structure of [N(C2H5)4]2Na3(H3O)4{Na[Mo6O15(O3PC6H5)(HO3PC6H5)3]2}..apprx.14H2OGuang Cao, Robert C. Haushalter, and Karl G. StrohmaierCite this: Inorg. Chem. 1993, 32, 2,…
A non-fouling (protein-resistant) polymer surface is achieved by the covalent immobilization of polyethylene oxide (PEO) surfactants using an inert gas discharge treatment. Treated surfaces have been characterized using electron spectroscopy for chemical analysis (ESCA), static secondary ion mass spectrometry (SSIMS),…
The compounds [H2im]4[Mo8O26(Him)2]1, [NH2Me2]4[Mo8O26(Him)2]·3H2O 2, [1-Hmim]4[Mo8O26(1-mim)2]·2H2O 3 and [2-Hmim]4[Mo8O26(2-mim)2]·3H2O 4(where Him = imidazole, 1-mim = 1-methylimidazole and 2-mim = 2-methylimidazole) have been synthesized. Compounds 1 and 3 were prepared by the reaction between molybdenum trioxide…
Titanium and titanium passive films have often been taken as standard cases in studying corrosion, passivation, and long term stability of valve metals. Recent work has shown that the corrosion and passivation behaviours and the stability of passive films on titanium depend greatly on the ambient solution. Earlier inv…
The paraelectric and ferroelectric phases of betaine phosphite [BPI: (CH3)3 NCH2COO H3PO3] single crystals have been studied. The structure of BPI was determined at room temperature using x-ray and elastic neutron diffraction. Details of the ferroelectric transition and various low temperature properties were investig…
X-Ray diffraction measurements are reported of ceramic samples of the mixed-oxide system Ce1–xLaxO2–x/2 for 0<x<0.9, where x has been determined by EDXA. The solid-state reaction forms a highly crystalline product at an ageing temperature of 1200 °C. The solubility limit of La in the bulk CeO2 at this temperature has…
After reviewing the present status of research on the crystallization of flexible polymers some new perspectives in the field, as arising from ongoing research, will be presented.First, a brief resumé is given of the experimental material on chain-folded crystallization (here to be termed ‘main stream’) on polyethylen…
The surface mobility stress-corrosion cracking mechanism is based on the assumption that environmentally induced crack propagation is due to the capture of vacancies by the stressed lattice, at the tip of the crack. The present paper shows that the role of the environment is not only to change the surface self-diffusi…
Phase diagrams of the Al2O3-Yb2O3-SiO2 system and the properties of glasses in this system were investigated. The results are summarized as follows:(1) Phase diagram of the 3-component Al2O3-Yb2O3-SiO2 system at 1550°C and those of the three types of 2-component Yb2Si2O7-Al6Si2O13, Al1.25Yb0.75O3-SiO2 and Al1.44Yb0.56…
The outlook for improving the energy product of permanent magnets beyond the theoretical limit of 516 kJ/m 3 for Nd 2 Fe 14 B is discussed. Most promising are nanostructured two-phase magnets consisting of an aligned hard-magnetic skeleton phase possessing exceptionally high uniaxial anisotropy and a soft-magnetic pha…
Abstract Glass transition temperatures ( T g ) for dilute and concentrated glucose: fructose: water solutions have been determined by differential scanning calorimetry. The supplemented phase diagrams (glucose: fructose 1:4, 1:2, 1:1, 2:1, 4:1 (w/w)) are presented and from these the temperature ( T g ') and concentrat…
Investigations of 4-[(S, S)-2, 3 epoxyhexyloxy]-phenyl-4-(decyloxy)-benzoate by polarizing microscopy, the Cano-Grandjean method, optical rotation dispersion and UV-VIS spectroscopy reveal a cholesteric phase with temperature induced reversal of the helical twist. Switching time experiments in the Sc* phase show that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChiral discrimination in electronic energy transfer between dissymmetric lanthanide(III) and cobalt(III) complexes in solution: effects of ligand size, shape, and configuration in the acceptor complexesDavid H. Metcalf, James P. Bolender, Michael S. Driver, and F. S. Richard…
A new biomaterial has been developed by fixing native collagen with a polyepoxy compound (PC) fixative. In this study, bovine internal thoracic arteries were fixed with PC under various conditions to help understand the kinetics of the collagen-PC reactions and optimize the fixation process. At predetermined time inte…