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。
Mitochondrial complexes I, II, and III were studied in isolated brain mitochondrial preparations with the goal of determining their relative abilities to reduce O2 to hydrogen peroxide (H2O2) or to reduce the alternative electron acceptors nitroblue tetrazolium (NBT) and diphenyliodonium (DPI). Complex I and II stimul…
The atomic structure of lead zirconate, PbZrO 3 (PZ), was studied using Rietveld refinement and atomic pair distribution function analysis of pulsed neutron powder diffraction data for the antiferroelectric, intermediate and paraelectric phases. The symmetry of PZ at T = 20 K in the antiferroelectric phase was determi…
Abstract The effects of the filler content and size on the mechanical properties such as tensile modulus, E c , yield strength, σ yc , and impact strength, S IC , of glass bead–filled polypropylene (PP) composites have been investigated employing an Instron materials tester and a Ceast impact tester at room temperatur…
During the last decade, aromatic cyanate esters (CE) have become established as a new and unique class of high-performance thermosetting resins for use as prepreg matrices in both the electronic and aerospace industries. The basic properties of CE resins, such as low moisture absorption, excellent electrical propertie…
X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) are used to characterize the interface between poly(acrylic acid) (PAA) and an aluminium oxyhydroxide (AlOOH) surface. Reaction of the PAA carboxylic acid functionality with hydroxyl groups at the surface of the oxide to form a m…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe First Dinuclear Complex of Palladium(III)F. Albert Cotton, Jiande Gu, Carlos A. Murillo, and Daren J. TimmonsView Author Information Laboratory for Molecular Structure and Bonding and Department of Chemistry, Texas A&M University College Station, Texas 77843-3255 D…
Spray pyrolysis of aqueous solutions that include copper(II) acetate, glucose, and 2‐propanol was studied for the formation of cuprous oxide (Cu 2 O) thin films on glass substrates. The deposition conditions, based on the phase relations of the films, were investigated in terms of solution concentration and substrate…
This work reviews the publications concerning the use of polymerizable surfactants (surfmers) in heterophase polymeriza-tion in terms of the mechanisms relevant to the process. The goal was to gain some insight into these mechanisms and to help the reader on the way in trying to find a suitable surfmer and to apply it…
Polyhydroxyalkanoates (PHAs) are microbial polyesters that can be used as completely biodegradable polymers, but the high production cost prevents their use in a wide range of applications. Recombinant Escherichia coli strains harboring the Ralstonia eutropha PHA biosynthesis genes have been reported to have several a…
The design and synthesis of new linear-dendritic diblock copolymers with a linear PEO block and a dendrimeric PAMAM block are described. Two series with PEO molecular weights of 2000 and 5000 were synthesized. DSC results on the effect of diblock composition on the microphase segregation behavior of the diblocks are r…
Organic vapor phase deposition (OVPD) opens new opportunities in the control of composition and structure of organic thin films. The use of this recently developed process is examined for the growth of four archetypal organic systems: a crystalline organic salt (the optically nonlinear charge transfer salt DAST, see F…
Among organic photochromic compounds (attractive for optical data storage) diarylethenes are of special interest as switching units. They undergo a reversible electrocyclic interconversion between a colorless, non-conjugated open state (see Figure) and a colored, conjugated closed state. The design and synthesis of di…
Silver ions are reduced in aqueous solutions that contain sodium polyacrylate or partly carboxylated polyacrylamide or glutaric acid. The reducing agent is the hydrated electron (generated γ-radiolytically) or hydrogen. Complexes of small silver clusters with the polyelectrolyte are formed in the early stages of reduc…
This work presents a comparative study of structural and aerodynamic properties of cellular ceramics prepared by two different techniques: the ceramic replication of an organic substrate and the gelcasting of foams. Permeability constants calculated from Ergun's equation were related to their apparent porosity and por…
Ferroelectric thin films of bismuth‐containing layered perovskite Bi 4 Ti 3 O 12 have been fabricated by a metalorganic decomposition (MOD) method. Crack‐free and crystalline films of ∼5000 Å thickness have been deposited on Pt/Ti/SiO 2 /Si substrates. Different heat treatments have been studied to investigate the nuc…
A quantitative study of hole-transfer superexchange in Class II mixed-valence complexes is presented. The free energy of resonance exchange was calculated from metal−metal coupling elements derived from Hush and CNS models and compared to experimental values that were factored from the free energy of comproportionatio…
A highly efficient luminescent material is produced from a 2,2′-bipyridine-lanthinide-ion coordination complex. The authors describe how this coordination complex can be stabilized by ethylene glycol oligomers. The material, obtained by simple mixing of the components, emits blue, green, and red photoluminescence by s…
The properties of lead zirconate titanate (PZT) ceramics are determined by the microstructure and chemical homogeneity of Zr, Ti, and dopants within the grains as well as the presence of secondary grain boundary phases. Stoichiometric 53/47 PZT and compositions with 3 mol% PbO excess were prepared by the mixed‐oxide p…
The relative stabilities of the unknown larger closo-borane dianions B(n)()H(n)()(2)(-) (n = 13-17), were evaluated at the B3LYP/6-31G level of density functional theory by comparing the average energies, E/n, and also by the energies using the model equation: B(n)()(-)(1)H(n)()(-)(1)(2)(-) + B(6)H(10) --> B(n)()H(n)(…
The refractive index increment of a protein solution is a property not only of the protein, but also of the solvent. This is demonstrated theoretically and confirmed experimentally using analytical interferometry. © 1998 John Wiley & Sons, Inc. Biopoly 46: 489–492, 1998