Materials Literature
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Abstract A detailed microstructural study of heavily rolled α-brass has revealed that in addition to straight shear bands a ‘wavy’ structure is also present. The cold-rolled material is considered to exhibit laminar structures and properties that are similar in some respects to the behaviour of laminar composite mater…
A generalized electret generator using polymer film electrets is proposed. The rotor of the generator consists of a conducting disk and several fan-shaped pieces of two types of film electret, attached to the conducting disk with alternate polarity. The stator consists of a conducting disk with holes that have the sam…
The density and ultrasonic velocity of N(p-n-heptyloxybenzylidene) p-n-pentylaniline (70.5) are measured as a function of temperature from the isotropic liquid to the smectic B phase. The compound is pentamorphic, exhibiting four smectic phases, viz. smectic G, smectic B, smectic C, smectic A, and a nematic phase. The…
Microprobe analyses of sakuraiite and the associated stannite and kesterite from the lkuno mine, Japan, indicate the following chemical formulae: for sakuraiite, (Cu, Zn, Fe)3Qn,Sn)Sa with Cu>Zn>Fe or Zn>Cu>Fe and In>Sn (In:Sn up to 89:ll); for stannite, (Cu,Fe,Zn)3(Sn,In)S4 with Cu>Fe>Zn and Sn>In (In:Sn up to 40:60)…
A computer model is described that yielded results consistent with Instron stress- strain curves for both the machine and cross directions of various polyester, thermally point-bonded, nonwoven fabrics. Fiber and bond tensile properties, bond layout, fabric density, and fiber curl and orientation were entered into the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrosion-inhibitor orientation on steelGeorge A. Salensky, Michael G. Cobb, and Dennis S. EverhartCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 2, 133–140Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 June 1986h…
The pair correlation function and the velocity autocorrelation function of screened-Coulomb colloidal liquids, interacting via the Derjaguin-Landau-Verweg-Overbeek potential, are calculated using molecular dynamics. Examination of the structure reveals liquidlike behavior even at the lowest density which corresponds t…
Abstract The phenomenalogical and theoretical aspects of secondary electron emission due to ion bombardment in the keV energy range has been reviewed and a comparision of this process with secondary electron emission due to electron bombardment has been made. The similarities and differences between the contrasts in t…
Abstract A model describing the expansion of a polyurethane (PU) foam in a closed mold is developed. An energy balance is stated, together with constitutive equations for the vaporization rate of the foaming agent and the polymerization kinetics. A numerical solution is obtained for an experimentally‐characterized PU…
Abstract A free‐radical mechanism by which lead compounds are thought to inhibit thermal dehydrochlorination of polyvinyl chloride (PVC) is described. This mechanism is called “true stabilization” in order to distinguish it from simple hydrogen chloride (HCl) scavenging, which is a well‐known and sometimes important f…
Abstract The crystalline transition induced by immersion in a methanol/water mixture of tussah silk fibroin (from Antheraea pernyi ) film obtained by casting from a 1% solution was studied by x‐ray diffraction, differential scanning calorimetry, and infrared spectroscopy. The molecular conformation of the fibroin, con…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular model of the cooperative amylose-iodine-triiodide complexAttilio Cesaro, Julio C. Benegas, and Daniel R. RipollCite this: J. Phys. Chem. 1986, 90, 12, 2787–2791Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 Ju…
In a distorted nematic texture, with boundaries at fixed potential, the electric field is nonlocal. This allows in particular the flexoelectric effect to give a volume contribution. Most calculations predicting large distortions must be revised.
Exogenously supplied, C-l4 labeled organic matrix from oyster shell inhibited spicule formation by embryos of the sea urchin, Arbacia punctulata, as measured by simultaneous incorporation of inorganic C-14. Analysis of isolated spicules showed that the matrix reached the site of crystal growth and became incorporated…
Abstract The Morphology of quenched poly(ethylene terephthalate) (PET) films crystallized by low‐molecular‐weight organic penetrants is studied by scanning electron microscopy. Films with thicknesses from ca. 1 mil (0.0025 cm) to ca. 35 mil (0.1 cm) were exposed to methylene chloride (MeCl 2 ) and N , N ‐dimethylforma…
The percent theoretical density, lattice parameter, oxygen-to-uranium ratio, and thermal conductivity of UO2-Gd2O3 burnable absorber fuel pellets were analyzed in terms of the structural chemistry of the cubic fluorite lattice and the chemical behavior of various uranium cations. The sinterability of gadolinia-contain…
"Principles of Phase Conjugation." Optica Acta: International Journal of Optics, 33(6), pp. 685–686
The diatom Thalassiosira pseudonana Hasle & Heimdal was grown in batch culture in one artificial sea-water medium and one fresh-water medium over a range of orthosilicic acid concentrations. Growth rates and cellular silicon quotas were measured in the exponential growth phase. The half-saturation constant of silicon-…
Laser-induced pressure pulses (LIPP's) of < 500 ps duration have been used to measure the ultrasonic attenuation in fluoroethylenepropylene (FEP), polyethyleneterephthalate (PETP) and polyimide(PI) as well as the charge, polarization, and piezoelectricity profiles in the thickness direction of polyvinylidenefluoride (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural-magnetic study of a new type of high-nuclearity metal carbonyl cluster possessing an eleven-atom Rh5Ni6 core: formation of a heterometallic core via nickel capping of a pentarhodium trigonal-bipyramidal kernelDick A. Nagaki, John V. Badding, Angelica…