Materials Literature
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The relationship between eddy current losses and magnetization dynamics is investigated on general bases, starting directly from Maxwell equations. The intrinsically stochastic character of the magnetization process is conveniently dealt with by describing the magnetization rate İ(r,t) as a random sequence of element…
A program incorporating the previously described double dipole model of the macrocyclic ring current in the porphyrin and chlorin ring is presented which allows the geometry of the aggregated species in solution to be obtained from observed NMR aggregation shifts. The model is capable of handling dimeric or oligomeric…
The solid solution range of melt‐grown mullite was examined by crystal‐chemical methods. The maximum Al 2 O 3 content as determined by EDX was ∼83.6 wt%, 75 mol%, or the nominal composition 3Al 2 O 3 .SiO 2 . For samples of overall composition 81 to 83 wt% Al 2 O 3 , extra lines indicating crystallographic superstruct…
Experimental studies of the blue phase of cholesteric liquid crystals have revealed two cubic phases (BPI and BPII) and a possible amorphous “fog” phase (BPIII). In addition, a number of theoretical models have been proposed which arrive at these structures from the point of view of a Landau theory, a lattice of discl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered structure in block polymer solutions. 5. Equilibrium and nonequilibrium aspects of microdomain formationMitsuhiro Shibayama, Takeji Hashimoto, and Hiromichi KawaiCite this: Macromolecules 1983, 16, 9, 1434–1443Publication Date (Print):September 1, 1983Publication His…
Eight strains of obligately anaerobic, mesophilic, cellulolytic bacteria were isolated from mud of freshwater environments. The isolates (C strains) were rod-shaped, gram negative, and formed terminal spherical to oval spores that swelled the sporangium. The guanine plus cytosine content of the DNA of the C strains ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT18[Hexa(2,6)pyridinocoronand-6]: "Sexipyridine"George R. Newkome and H. W. LeeCite this: J. Am. Chem. Soc. 1983, 105, 18, 5956–5957Publication Date (Print):September 1, 1983Publication History Published online1 May 2002Published inissue 1 September 1983https://pubs.acs.org/d…
Experimental analysis was carried out to study the rheological properties of foam. Foam was generated by simultaneously injecting air and an aqueous solution of the foaming agent through a coiled tubing foam generator. Foam was injected at the bottom of an annulus with 4.0-in. (i.d.) casing diameter and 1.5-in. (o.d.)…
We consider a one-dimensional electron gas with a half-filled band in which the electrons are coupled to both intersite and intrasite lattice distortions. In the region of parameter space in which both types of distortion develop nonzero expectation values, a new class of soliton which spontaneously breaks the charge…
Abstract (1) The resorcinol-hexa-silica bonding system is essential for NR-silk fiber systems. (2) Mechanical anisotropy is observable only at higher fiber loadings (20 phr and above) in NR-silk fiber systems. (3) In composites containing a sufficient amount of bonding agents and fibers for tensile anisotropy to be ob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe synthesis and structure of tetrasodium tetramethoxyoctamolybdate-methanol complex (Na4[Mo8O24(OCH3)4].8MeOH): a novel isopolymolybdate that decomposes with the loss of formaldehydeE. M. McCarron III and R. L. Harlow ICite this: J. Am. Chem. Soc. 1983, 105, 19, 6179–6181P…
Blends of high density polyethylene (HDPE) and poly(ethylene terephthalate) (PET) exhibit extremely poor mechanical properties owing to the incompatibility of these two polymers. Such blends, however, would result from the reprocessing of certain carbonated beverage bottles. Addition of small amounts of a commercially…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered structure in block polymer solutions. 3. Concentration dependence of microdomains in nonselective solventsMitsuhiro Shibayama, Takeji Hashimoto, Hirokazu Hasegawa, and Hiromichi KawaiCite this: Macromolecules 1983, 16, 9, 1427–1433Publication Date (Print):September 1…
A number of recent experimental silicon oxidation studies has suggested that the present form of the linear-parabolic oxidation model is inadequate in explaining the results. However, the best available oxidation data are linear-parabolic in shape. The present study relieves this dilemma by revising the linear-parabol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface characterization of copper(II) oxide-zinc oxide methanol-synthesis catalysts by x-ray photoelectron spectroscopy. 2. Reduced catalystsYasuaki Okamoto, Kiyotaka Fukino, Toshinobu Imanaka, and Shiichiro TeranishiCite this: J. Phys. Chem. 1983, 87, 19, 3747–3754Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of (.mu.-azido)-(.mu.-hydroxo)bis[(N,N,N'N'-tetramethylethylenediamine)copper(II)] perchlorate, a copper(II) dinuclear complex with a large ferromagnetic interactionOlivier Kahn, Sonia Sikorav, Jacqueline Gouteron, Suzanne Jeannin, a…
ABSTRACT Light and scanning electron microscopy were utilized to quality diatom colonization in Oak Creek, Arizona. Aluminum SEM stubs with and without plexiglass discs were anchored into rocks. Early colonization on five stub microzones was examined at hourly intervals; weekly intervals of up to 3 wk were employed to…
The adhesion of two Staphylococcus epidermidis strains and one Staphylococcus saprophyticus strain on to poly(tetrafluorethylene-co-hexafluorpropylene) (FEP)-fluorocarbon and cellulose acetate was studied in vitro. Both S. epidermidis strains showed a more hydrophobic character than the encapsulated S. saprophyticus a…
Uranium dioxide fuel with initial grain sizes from 8 to 80 μm was irradiated at linear ratings of 50 to 65 kW/m to a maximum burnup of 230 MW*h/kg U (10000 MW.d/metric ton U). At a linear power of 50 kW/m, where grain growth is not significant, a large initial grain size reduced fission gas release; above 50 kW/m, the…
Wyckoff positions of centrosymmetric symmorphic space groups, if properly interpreted, can be used to derive the Bravais classes of modulated crystals. This program is worked out here for the incommensurate case and assuming that the modulation wave vectors are symmetry related, i.e. are (integral combinations of) vec…