Materials Literature
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The bending rigidity of wool worsted yams was estimated from the mean fiber diameter together with four correction factors due to fiber diameter distribution, yam twist, fiber ellipticity, and mean fiber length. The first two correction factors were the most important. The bending hysteresis (the coercive couple) incr…
Moharam and Gaylord [ J. Opt. Soc. Am.71, 811 ( 1981)] have recently found a neat new way of numerically analyzing the coupled-wave equations describing light propagation in thick, uniformly modulated dielectric gratings with parallel planar boundaries. This interesting new contribution has raised some important quest…
Replacement of the expansion coefficient and of the bulk modulus and Bridgman constant of the occupied volume by the corresponding parameters of the glass leads to acceptable predictions for the shift factor, a p, for superposition of stress relaxation measurements as a function of pressure at constant temperature onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcited-state electron-transfer reactions of zinc octaethylporphyrinNatalia Barboy and Jehuda FeitelsonCite this: J. Phys. Chem. 1984, 88, 6, 1065–1068Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://pu…
A thin, heated glass rod fixed at one end is quickly rotated around its axis in a small vertically positioned tube furnace. A computer is used to determine the temperature‐viscosity correlation by solving an integral equation from the measurement of the torsion moment, the speed of rotation, the diameter of the rod, a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction potentials and the properties of xenon overlayers physisorbed on the graphite basal planeMichael L. Klein, Seamus O'Shea, and Yoshiaki OzakiCite this: J. Phys. Chem. 1984, 88, 7, 1420–1425Publication Date (Print):March 1, 1984Publication History Published online1…
The transport of heavy particles produced by the 10B(n,α)Li and 235U(n,νn)ff nuclear reactions in a two-region cylindrical geometry is analyzed. Total spatially dependent energy current, power density, and transport efficiency are calculated. These results are significantly different from what would be predicted using…
Abstract Perfluorobutenyloxyphthalic anhydride (PFPA) has been synthesized as a new curing agent for epoxy resins, and the properties of epoxy resin cured with PFPA have been investigated. Good PFPA synthesis yields were realized by a dehydrating ring closure of perfluorobutenyloxyphthalic acid, which was obtained thr…
A 2% aqueous solution of methylene blue was administered as a single intravenous (i.v.) bolus injection (10 mg/kg) to six lactating cows and seven lactating goats and a continuous i.v. drip to five lactating goats. The same dose was administered as a 10% solution by intramammary infusion to five lactating goats. Blood…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of (octaethylporphyrinato)cobalt complexes with diazoacetaldehyde. N-(Formylmethyl)- and N-(2-hydroxyethyl)porphyrinsJunichiro Setsune and David DolphinCite this: Organometallics 1984, 3, 3, 440–443Publication Date (Print):March 1, 1984Publication History Published…
In the course of a systematic study of the structural and conformational phase-transition sequences present in crystals with the general formula ${({\mathrm{C}}_{n}{\mathrm{H}}_{2n+1}{\mathrm{NH}}_{3})}_{2}\mathrm{Zn}{\mathrm{Cl}}_{4}$, a pure proper gyrotropic phase transition has been discovered at 249 K in the bis-…
Matrix elements may be viewed as the scalar projection of an operator onto the transition density between the states involved (trace of matrix product equivalent to double dot product). This means that the operator and transition density matrices must “look the same” if a matrix element is to be the large. Using CNDO/…
Abstract The kinetics of the formation of polyacrolein microspheres by ionizing radiation (polymer I) were investigated. Their structure and reactivity were compared with polyacrolein microspheres prepared by base catalysis (polymer II). The study of Fourier infrared (IR) spectra of polymers I and II showed structural…
Abstract Monitoring the wetting force exerted on a single fiber while the fiber is slowly and continuously immersed in a liquid and then withdrawn can provide several kinds of information about the physicochemical heterogeneity of the fiber surface. This method for scanning the fiber surface with an appropriate liquid…
Using nanosecond laser pulses, we have observed for the first time optically induced transient and (erasable) permanent gratings in a smectic-A film. The transient grating is accompanied by strong high frequency acoustic waves.
Abstract Poly(vinyl chloride) (PVC) and its blends with polybutadiene‐acrylonitrile (NBR) (containing 21.7 weight‐percent acrylonitrile (AN), a heterogeneous two‐phase system; and containing 41.6 weight‐percent of AN, a homogeneous one‐phase system) and with polyethylene‐vinyl acetate (EVA) (containing 45 weight‐perce…
Abstract Contact angle and surface tension were measured for distilled and hard water solutions of adjuvants, Ortho X‐77, Span‐20, Sterox‐NJ. Surfactant‐WK, Triton B‐1956, Triton X‐114, Tween‐20, and Sun Oil 11E. The same parameters were measured for suspensions of atrazine [2‐chloro‐4‐(ethylamino)‐6‐(isopropylamino)‐…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray diffraction and nuclear magnetic resonance studies of the relationship between electronic structure and the tetragonal distortion in zirconium hydride (ZrHx)Joseph S. Cantrell, R. C. Jr. Bowman, and D. B. SullengerCite this: J. Phys. Chem. 1984, 88, 5, 918–923Publicati…
Crystal structures of Ca 2 Sr(C 2 H 5 CO 2 ) 6 at sixteen temperatures between -160°C and 150°C have been determined accurately, using an X-ray four circle diffractometer. The occupancies of the three disordered methyl groups in a formula unit, together with the displacements of Sr, Ca and O atoms, vary with temperatu…
Abstract Tetrahedral framework compounds, as defined in this paper, generally exist as tilted and distorted versions of ideal fully expanded structures at room temperature and atmospheric pressure. How pressure, temperature, and composition ( P, T , and X ) affect the tilting and distortion is critically reviewed. It…