Materials Literature
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A model is proposed to permit the calculation of the remanence in a magnetic tape that is subject to various magnetizing processes. A combination of a regenerative local field and the Preisach diagram is proposed to account for particle interaction. It is shown that, although the Preisach diagram is not stable, its sh…
Hyperfine fields for an Fe atom in intermetallic compounds, Fe 5 Sn 3 and FeSn, have been investigated by using the Mössbauer effect. The hyperfine field of Fe 5 Sn 3 with hexagonal B8 2 -type structure is 187kOe on 2(a) sites while that on 2(d) sites has two values, 247kOe and 208kOe, at liquid-air temperature. The B…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Route to Boron NitrideJ. Economy and R. AndersonCite this: Inorg. Chem. 1966, 5, 6, 989–992Publication Date (Print):June 1, 1966Publication History Published online1 May 2002Published inissue 1 June 1966https://pubs.acs.org/doi/10.1021/ic50040a008https://doi.org/10.102…
Abstract The starch–polyacrylonitrile graft copolymer prepared from gelatinized wheat starch with ceric ammoninm nitrate as the initiator has been freed of ungrafted polyacrylonitrile and separated into fractions by extraction with dimethylformamide, γ‐butyrolactone, and dimethyl sulfoxide. The copolymer fractions obt…
Abstract The polymers deposited from the vapors of pentane, ethylene, butadiene, benzene, styrene, and naphthalene subjected to glow discharge have been analyzed by infrared absorption techniques. The reaction products show unsaturation, hydrogenation, and branching in the polymer chains. Aromaticity is present only i…
Many oriented growth phenomena, including the elongation of the Nitella internode, are based upon oriented or textured cell wall structure. In many cases the ordered textures are not present in the earliest stages of cell development but appear later. In Nitella lateral cell (leaf) development the first appearance of…
In the low-temperature range, the engineering yield strength of polycrystalline bcc metals can change by a factor of 10 or more with serious consequences appearing in the form of catastrophic brittle fracture. Engineering variables known to have an important effect on the yield behavior are state of stress, temperatur…
Respiration of bacteria was stimulated most by montmorillonite, primarily as the result of this clay maintaining the pH at levels adequate for sustained growth; additional mechanisms also appeared to be involved. Kaolinite and montmorillonite served equally as a source of minerals for bacterial nutrition, and the stim…
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Two models of magnetization reversal for the case of films with biaxial anisotropy are considered: 1 ) the coherent rotation model of Stoner and Wohlfarth (S-W) and 2) the noncoherent or wall-motion model of Kondorsky (K). The former has been considered by several authors previously while the latter is developed in th…
Hydrostatic theories of liquid crystals involve a stored energy function, in simpler theories formally similar to that used in linear elasticity theory. In the latter case, the generally accepted condition that the energy function be positive definitely plays a key role in much theoretical work. Analogous conditions a…
Abstract A staining procedure consisting of preliminary etching with dilute hydrochloric acid, treatment with a mixed solution of alizarin red-S and potassium ferricyanide, and a final treatment with alizarin red-S alone (Dickson, 1965) permits the distinction of orthorhombic carbonates and of calcite from other trigo…