Materials Literature
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LCAO-CPA theory is applied to substitutionally disordered ferromagnetic BCC FeCo alloys. Calculations are based on charge and spin self-consistent LCAO parameters determined for the pure component metals within the local spin density functional theory. Effects of charge and spin self-consistency on the alloy magnetisa…
Simultaneous measurements of load, deformation and diameter were performed on stretched collagen fiber bundle from rat tail tendon using a dynamic, electronically controlled stretch system and a novel computer based electroptical set-up. A parallel analysis of glycosaminoglycan (GAG) concentration in the bathing solut…
We present the phase diagram of a binary system of two nematogenic terminal, non-polar compounds in which an induced smectic A phase appears over a large concentration–temperature range. X-ray measurements give evidence that the layer spacing, d, of this induced smectic A phase is clearly larger than the average molec…
The magnetic properties of Fe-Mn-Al alloys in the disordered phase are investigated through the M\"ossbauer technique. The magnetic phase diagram in the bcc structural phase is obtained as a function of the Al concentration ($q$) and Mn concentration ($x$). The site-diluted Ising model proposed in a previous study of…
The existing problems of the current methods for fabric handle evaluation are analyzed and as an alternative, a new measure, the weighted Euclidean distance (WD) value, of total handle is proposed. Using this method, one can specify the preferences of fabric handle. The whole process for deriving and calculating this…
The diatom genus Libellus Cleve was erected for naviculoid species with numerous girdle bands, L. grevillii (CA. Ag.) Cleve being the type species of the genus. The structure of this species has been compared with that of Navicula tripunctata (Müll.) Bory, the type of Navicula Bory. There are considerable structural d…
Japanese nickel titanium (NiTi) alloy wire possesses excellent spring-back properties, shape memory and super-elasticity. In order to adapt this wire to clinical use, it is necessary to bend as well as to control its super-elastic force, and so a direct electric resistance heat treatment (DERHT) method was developed.…
Photoluminescence properties of Mg- or Zn-doped Ga 0.5 In 0.5 P grown by metalorganic vapor phase epitaxy were studied as a function of hole concentration ( p ). The band-gap energy ( E g ) value for Mg- or Zn-doped Ga 0.5 In 0.5 P, grown under a condition in which undoped Ga 0.5 In 0.5 P shows an anomalously low E g…
Precise x-ray measurements of the tilt angle near the $\mathrm{Smectic}\ensuremath{-}A\ensuremath{-}\mathrm{Smectic}\ensuremath{-}{C}^{*}$ tricritical point show clear evidence of mean-field to tricritical crossover behavior; the mean-field region shrinks to zero at the tricritical point.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology of segmented polybutadiene-polyurethane elastomersChi Li, Steven L. Goodman, Ralph M. Albrecht, and Stuart L. CooperCite this: Macromolecules 1988, 21, 8, 2367–2375Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published iniss…
The redox chemistry of Cu(II)-S(IV) complexes is examined, and the rate of reduction of Cu(II) is determined. The reduction of Cu(II) is shown to proceed via Cu^(II)_2SO_3^(2+) and Cu^(II)SO_3OH^+ intermediates. Copper(I), SO_4^(2-), and a mixed-valence compound, Cu^(II)SO_3Cu^l_2SO_3.2H_2O, are determined to be the p…
The mechanisms of interaction between a twin boundary and dislocations created during the deformation of a bicrystal are analysed by means of HREM. It is shown, on an atomic scale, that intrinsic dislocations enter the grain boundary where they decompose into discrete grain-boundary dislocations with Burgers vectors b…
The mesenchymal tissue component of the teleost pectoral fin bud has been explanted onto microfabricated quartz discs containing patterns of regular grooves of dimensions similar to those encountered by contact-guided cells in the intact fin system. Computer-aided analysis of cell migration on five separate patterns,…
Cyclotella species from several Canadian lakes have been investigated and their morphology illustrated by light and electron microscopy. Cyclotella antiqua W. Smith, C. bodanica var. bodanica Grun., C. bodanica var. affinis Grun., C. meneghiniana Kütz. and C. michiganiana Skvortzow have been identified with certainty…
A fluid of hard spherocylinders is studied in the Onsager model adapted to a nonuniform system. The interfacial properties at nematic-phase--isotropic-phase coexistence are considered. It is found that the angle between the director and the normal to the interface is approximately 60\ifmmode^\circ\else\textdegree\fi{}…
Optically stimulated luminescence and thermally stimulated luminescence in MgS:Ce,Sm and MgS:Eu,Sm have been investigated. It appears that samarium in the form of Sm3+ ion acts as a thermally stable electron trap in MgS:Ce,Sm and MgS:Eu,Sm. A Sm3+ ion becomes a Sm2+ ion capturing an electron when these materials are e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHole delocalization in oxidized cerium(IV) porphyrin sandwich complexesRobert J. Donohoe, John K. Duchowski, and David F. BocianCite this: J. Am. Chem. Soc. 1988, 110, 18, 6119–6124Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published…
The use of a mid-infrared transmitting fiber to carry the infrared beam of an FT-IR spectrometer outside of the optical bench is reported. In addition it is demonstrated that it is possible to analyze samples using the fiber as an internal reflection element. The fiber is covered with a protective coating which can be…
We propose a density-functional theory for the isotropic-nematic transition of hard ellipsoids which is in fair quantitative agreement with the recent computer simulations of this system and which improves considerably upon the earlier theoretical attempts. The theory has an explicit oblate-prolate symmetry and leads…
Infrared (IR) reflectivity measurements were undertaken on pure ZrO2 and stabilized ZrO2⋅Y2O3 solid solutions containing 3-, 4-, 7-, 12-, and 20-wt.% Y2O3 over 10–900 cm−1 region as a function of temperature up to 1400 °C. The observed IR active phonons are related to the phase transitions that depend on composition a…