Materials Literature
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A magneto-structural relationship showing linear dependence of antiferromagnetic exchange coupling constant (–J) on Ni–O–Ni bridge angle as well as the intramolecular Ni ⋯ Ni distance has been obtained with a series of phenoxy-bridged macrocyclic dinickel(II) complexes with centrosymmetric structures.
Physical behaviour of polymeric foams - an overview. Polyurethane flexible foam formation. Characterization of polymeric cellular structures. The morphology of flexible polyurethane matrix polymers. Heat transfers in foams. Thermal ageing. The elastic behaviour of low density cellular plastics. Hysteresis and energy l…
Electrochemical measurements, x-ray photoelectron spectroscopy, and scanning tunneling microscopy have been used to study the effect of hydrogen peroxide on the passivity of titanium in a phosphate-buffered saline (PBS) solution. The results indicate that the passive film formed in the PBS solution--with and without a…
The amphipathic anthracycline base doxorubicin (DXR) was accumulated in the aqueous phase of the liposomes where it reached a level as high as 100-fold its concentration in the remote loading medium. Most of the intraliposomal DXR was present in an aggregated state. Efficient (>90%) and stable loading into the liposom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCationic polymerization of glycidol: coexistence of the activated monomer and active chain end mechanismR. Tokar, P. Kubisa, S. Penczek, and A. DworakCite this: Macromolecules 1994, 27, 2, 320–322Publication Date (Print):January 1, 1994Publication History Published online1 M…
Polymer-dispersed liquid crystals (PDLC) are widely used for electro-optic applications such as flexible displays, privacy windows or projection displays. Besides these applications, the confinement of a liquid crystal to small cavities is of fundamental interest. The present paper contains a review of the work on nem…
The title porphyrin shows non ideal cmc with formation of J-aggregates, due to the formation of intermolecularly stabilized zwitterions, which at high concentration also results in H-aggregates.
The grain boundary space charge depletion layers in acceptor‐doped SrTiO 3 and BaTiO 3 ceramics were investigated by impedance spectroscopy in the time and frequency domain. Based on the layer width and its dependence on the acceptor concentration, the temperature, and the oxygen partial pressure during annealing, a s…
Charge-carrier recombination dynamics after laser excitation are investigated by time-resolved microwave conductivity (TRMC) measurements of quantum-sized (Q-) TiO2, FeIII-doped Q-TiO2, ZnO and CdS, and several commercial bulk-sized TiO2 samples. After pulsed laser excitation of charge carriers, holes that escape reco…
A complete, three phase transformer model for the calculation of electromagnetic transients is presented. The model consists of a set of state equations solved with the trapezoidal rule of integration in order to obtain an equivalent Norton circuit at the transformer terminals. Thus the transformer model can be easily…
This volume in the Surfactant Science series provides coverage of fluorinated surfactants, their basic science and related theories. It highlights diverse aspects of fluorinated surfactants and systems, including liquid-vapour and liquid-liquid interface, solid-liquid interface, solutions of fluorinated surfactants an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the Structure of Microporous Ti-Si Mixed Oxides by X-ray, UV Reflectance, FT-Raman, and FT-IR SpectroscopiesZhufang Liu and Robert J. DavisCite this: J. Phys. Chem. 1994, 98, 4, 1253–1261Publication Date (Print):January 1, 1994Publication History Published o…
Successive reduction steps of CeO2 particles by hydrogen between 300 and 1070 K have been followed by temperature-programmed reduction (TPR) and in situ magnetic measurements on several samples with different BET surface areas. The nature of the phases present in cerias reduced between 670 and 1270 K was determined by…
A consistent set of pair potentials has been derived empirically by fitting to the experimentally measured lattice properties of a series of binary metal oxides. In contrast to previous strategies, the potential parameters required to reproduce the experimental lattice properties of all the chosen compounds were optim…
The wear resistance of an Fe-12.2wt%Cr-0.84wt%Mo-0.43wt%V-1.44wt%C alloy tool steel after cold treatment at 223K (subzero treatment) and after cryogenic treatment 93K (ultra-subzero treatment) has been investigated. The wear resistance of steels after cryogenic treatment is superior to that after cold treatment. The e…
MIC (microbiologically influenced corrosion) is the deterioration of metal by corrosion processes that occur either directly or indirectly as a result of the activity of living organisms. This handbook explains the interdisciplinary nature of MIC - the roles of microbiology, metallurgy and electro-chemistry are interr…
Temperature-dependent Sellmeier coefficients are necessary to optimize optical design parameters of the optical fiber transmission system. These coefficients are calculated for fused silica (SiO/sub 2/), aluminosilicate, and Vycor glasses for the first time to find the temperature dependence of chromatic dispersion at…
Ceramic processing. General influence of microstructure on ceramic properties. Techniques for characterizing ceramic microstructures. Preparation of ceramic samples for microscopy. Structural oxides I: Al2O3 and mullite. Structural oxides II: ZrO2. Synthetic structural non-oxides. Refractories. Ceramic matrix composit…
Spin-density waves (SDWs) are broken-symmetry ground states of metals, the name referring to the periodic modulation of the spin density with period, ${\ensuremath{\lambda}}_{0}=\frac{\ensuremath{\pi}}{{k}_{F}}$, determined by the Fermi wave vector ${k}_{F}$. The state, originally postulated by Overhauser, has been fo…
We demonstrate a physically-based technique for predicting the drape of a wide variety of woven fabrics. The approach exploits a theoretical model that explicitly represents the microstructure of woven cloth with interacting particles, rather than utilizing a continuum approximation. By testing a cloth sample in a Kaw…