Materials Literature
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A study of the surface tension of semi-dilute polymer solutions in theta solvent conditions is presented. Theoretical predictions are given for the two cases when the interface is attractive or repulsive. The Cahn approach for the interfacial tension is used in order to calculate the interfacial tension in the mean fi…
Actinide oxides used for nuclear reactor fuels have fluorite-type cubic structure. In this crystal structure, the self-diffusion coefficients of the constituent ions are closely related to its sublattice structure. Characteristics of the actinide oxides are reviewed with respect to self-diffusion and chemical diffusio…
Chitin and chemically modified chitins were spun to the fibers and their tensile properties were investigated together with the accessibility toward lysozyme. The fiber of partially deacetylated chitin showed the best properties in the tensile strength especially in a wet state. On the other hand, the accessibility of…
Vaccinium § Cyanococcus is defined by having verrucose twigs, dimorphic perennating buds, corymbose inflorescences, pedicels that are articulated with the calices, and berries that are pseudo-10-loculed. The section is endemic to North America and contains nine species, four of which have a hybrid origin. The ancestra…
Chondrosia reniformis sponge collagen, insoluble in its native form, was solubilized by chemical modification of lysyl residues. The solubilized sponge collagen had the same amino acid composition as insoluble collagen and the helicoidal tertiary structure was found by negative Cotton effect to be the same as in nativ…
The three principal elastic constants, K 11, K 11, and K 33, of the eutectic nematic liquid crystal mixture E7 have been determined as a function of temperature by following changes in the anisotropy of turbidity of a magnetically aligned specimen. The agreement with values of K 22 obtained by a previous capacitance-v…
A review is made of in vitro and animal investigations in which the properties of the non-ionic, ratio 3.0 contrast medium iohexol have been compared with those of other contrast media. The clinical importance of such investigations is discussed. In most investigations iohexol had less toxic effects than ionic ratio 1…
The fatigue behavior of monocrystalline Cu–Al–Ni shape memory alloys have been investigated by uniaxial fatigue tests under various deformation modes. Fatigue life, Nf, was found to depend on the deformation modes and to be long in the order of elastic deformation, reorientation of martensites and transformation pseud…
Laihunite, an apparent nonstoichiometric olivine-type mineral, shows a 3C type superstructure. This mineral has a basic cell of a=4.805(2)Å, b=10.189(9)Å, c=5.801(3)Å and α=91.0(2)° and the space group P21⁄b(a=unique axis) for the average structure. The basic structure has been studied by the single crystal X-ray meth…
After a brief discussion of the design and manufacturing of a vacuum-impregnated epoxy resin mica insulation system for turbine-generators, this paper describes the time-proven properties and the improvements, which have been implemented during the past 20 years to meet more stringent utilization and electrical requir…
The non-carbido decaosmium cluster dianion [H4Os10(CO)24]2–(1) has been prepared in low yield by heating several trinuclear osmium clusters in isobutyl alcohol; X-ray analysis of the [(Ph3P)2N]+ salt shows that the tetrahydrido-dianion (1) is very similar in structure to the carbido-dianion [Os10C(CO)24]2–(2) indicati…
Nidation of gallstones by inorganic or organic Ca salts was studied in 336 consecutive cases by SEM/EDXA and additional methods (X-radiography, X-diffraction, IR spectroscopy). SEM/EDXA proved to be a useful method in studying very small radio-dense nuclei, since common means of phase analysis are limited because of t…
Observations of {110} plane-matching grain boundaries have been made by electron channelling patterns (ECPs) for the recrystallization structure of an Fe-3% Si alloy. It has been found that the {110} plane-matching grain boundary plays an important role in the grain growth during recrystallization of the alloy. The gr…
The effects of pressure on thermal denaturation and in vitro fibril formation of acid soluble collagen from calf skin were studied with various solvent conditions under high pressure of up to 4, 000 atm. For all the solvent systems, the thermal denaturation was depressed by pressure, e.g., the apparent denaturation te…
Neutral soluble collagen was extracted from lathyritic rat skin under proteolysis-inhibited conditions. Purified solutions were characterized by electric birefringence and heterodyne beat quasi-elastic light-scattering techniques under conditions where the monomeric form was stable (at 4 degrees C in 0.032 M phosphate…
The symposium on Flammability and Sensitivity of Materials in Oxygen was held in Phoenix, Arizona, 31 March-1 April 1982, and was sponsored by ASTM Committee G04 on Compatibility and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Barry L. Werley
MgO compacts were sintered from 900° to 1395°C in dry argon and in argon with 2.3 kPa of water vapor. The surface area and pore size distributions measured by mercury porosimetry showed large changes during the first minute of sintering, indicating that rearrangement instead of coalescence of small particles is the co…
The diamagnetic susceptibilities of some 4,4'-disubstituted biphenyl cyclohexanes are reported as a function of temperature. The order parameters of the uniaxial nematic, smectic A and smectic B phases are calculated. The effect of the terminal substituents and the central groups on the magnetic anisotropy and the ord…
29 Si N.m.r. spin–lattice relaxation times have been measured in some layer aluminosilicates and found to vary over three orders of magnitude, demonstrating that, in contrast to results reported to date, 29Si T1's may be extremely long in aluminosilicates.
Eclogites from the Eastern Belt of the Seve Nappes, Jämtland, Central Scandinavian Caledonides, have an LS fabric in which the foliation S and lineation L are both defined by the shape preferred orientation of omphacite. The orientation distribution diagram of omphacite reveals a crystallographic fabric defined by [00…