Materials Literature
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Paracrystalline disorder, a type of lattice imperfection which results in a loss of long-range crystalline order, was assessed in a range of biological and synthetic apatites using x-ray diffraction data. Carbonate substitution in the apatite lattice increased the amount of paracrystalline disorder in synthetic precip…
Abstract A theoretical study was carried out to achieve a better understanding of the oscillatory behavior of a gas bubble growing (or collapsing) in a viscoelastic liquid, by taking into account both the hydrodynamic and diffusion effects. The Zaremba‐DeWitt model was chosen to represent the rheological properties of…
Abstract Reinforcement of silica filler in NR in the presence of a silane coupling agent (Si-69), and an additive (TEA) has been analyzed by studies on swelling of the vulcanizate, network structure, technical properties, and scanning electron micrographs. Failure properties in the presence of a coupling agent have be…
A total of 146 measured muonic Coulomb capture ratios of anhydrous solid binary compounds has been used to derive average muonic Coulomb capture probabilities for 65 elements. The measured capture ratios can be well reproduced by ratios of these capture probabilities. This is also true for ratios in ternary compounds,…
Demonstrates the formation of Mn2O7 and its powerful oxidation of simple alcohols.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of luminescence from Ru(bpy)3Cl2 adsorbed on semiconductor surfacesTakashi Kajiwara, Kazuhito Hashimoto, Tomoji Kawai, and Tadayoshi SakataCite this: J. Phys. Chem. 1982, 86, 23, 4516–4522Publication Date (Print):November 1, 1982Publication History Published online1…
In this paper we report the results of an experimental study of the fluorescence excitation spectra and of the time-resolved emission of Zn-tetraphenylporphyrin (ZnTPP) and of free-base tetraphenylporphyrin (H2TPP) seeded in pulsed supersonic expansions of He. We have studied the S0→S1 transition (the Q band) and the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal ion exchange reactions in cage molecules: the systems [M4-nM'n(SC6H5)10]2- (M, M' = Fe(II), Co(II), Zn(II), Cd(II)) with adamantane-like stereochemistry and the structure of [Fe4(SC6H5)10]2-K. S. Hagen, D. W. Stephan, and R. H. HolmCite this: Inorg. Chem. 1982, 21, 11,…
Small-vessel arterial replacement by a prosthetic material elicits inflammatory and regenerative reactions that alter the patency rate of the resultant prosthesis-tissue complex. Woven absorbable polyglycolic acid prostheses, 24 mm in length, were implanted into adult rabbit aortas and followed for 7 1/2 months. At th…
Crystal structure of antiferroelectric PbZrO 3 has been studied at room temperature by adopting X-ray and neutron profile analysis methods. A considerable refinement of the structure has been made on a previous model which has generally been accepted in these 20 years. In contrast to the old model which has a large sp…
The physical origin of losses in conducting ferromagnetic materials is the production of heat by the flow of eddy currents in the material. The eddy currents are generated by the voltages caused by changes in the magnetic induction. This statement, although true, is not very helpful in calculating or predicting the ac…
Abstract Tear strengths have been measured for a wide variety of molecular networks under threshold conditions; i.e., at high temperatures, low rates of tearing, and with swollen samples. For all of the polymers examined, the threshold tear strength was found to be proportional to the square root of the average molecu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimultaneous static and dynamic light scatteringS. Bantle, Manfred Schmidt, and Walther BurchardCite this: Macromolecules 1982, 15, 6, 1604–1609Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Published inissue 1 November 1982https://pub…
Abstract The microstructure of semicrystalline polymers solidified with and without concurrent applied strain is reviewed. Fluid flow in the filling and packing stages of injection‐molding are discussed. Observations of the microstructures of a number of polymers under various conditions are described. In general, the…
Amorphous carbon films have been prepared in a r.f. glow discharge from various hydrocarbon gases. Electrical conductivity and optical absorption measurements show a strong dependence on the preparation gas and on the substrate temperature T d. Particularly for specimens prepared from ethylene, varying T d from 230 to…
This paper concerns the dynamic light scattering by suspensions of polydisperse hard spherical particles. It is concluded that for relatively high volume fractions and fairly narrow distributions, the light scattering correlation function should, to a good degree of approximation, be composed of two independent modes…
Abstract Neutral and negatively charged liposomes containing Adriamycin (ADM) were examined for the efficiency of drug entrapment, serum stability, in vivo tissue distribution, and tumor-inhibitory activity. Entrapment of ADM in negatively charged liposomes containing phosphatidylserine (PS) or cardiolipin (DPG) was 3…
An adiabatic scanning calorimeter has been used to study the thermal behavior of the liquid-crystal octylcyanobiphenyl (8CB) in the temperature range between 10 and 50\ifmmode^\circ\else\textdegree\fi{}C. The solid---to---smectic-$A$ ($\mathrm{KA}$), the smectic-$A$---to---nematic ($\mathrm{AN}$), as well as the nemat…
Analytical formulae or the effect of interaction between pairs of rigid spherical particles on the mean velocity of each species in a statistically homogeneous dilute polydisperse system were given in Part 1 (Batchelor 1982), and are here evaluated numerically. We have calculated the pair-distribution function and the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDinuclear copper(II) cryptates of macrocyclic ligands: synthesis, crystal structure, and magnetic properties. Mechanism of the exchange interaction through bridging azido ligandsJacques Comarmond, Pierre Plumere, Jean Marie Lehn, Yvette Agnus, Remy Louis, Raymond Weiss, Oliv…