Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of Polystyrene-Polydimethylsiloxane Block CopolymersJohn C. Saam and F. W. Gordon FearonCite this: Ind. Eng. Chem. Prod. Res. Dev. 1971, 10, 1, 10–14Publication Date (Print):March 1, 1971Publication History Published online1 May 2002Published inissue 1 March 1971h…
A brief résumé of basic magnetism is followed by a consideration of the magnetization process in the absence of applied mechanical stress, in which the importance of internal stresses and inclusions is emphasized and which leads to the introduction of Néel's disperse field theory. The Rayleigh laws are interpreted in…
The ultraviolet circular dichroism spectra of human lysozyme are presented. Effects of pH and added inhibitor (N-acetyl-D-glucosamine) were examined and the results were compared with similar measurements of hen egg-white lysozyme. The near-ultraviolet CD spectral bands are substantially different in the human and hen…
Problems associated with the measurement of changes in the rate of wool growth are discussed. In particular, there are large errors due to the "emergence time" of the wool, that is the time required for newly keratinized portions of fibre to move out of the follicles to the point where they can be removed by clipping.…
Design equations for the most commonly used ferroresonant regulators and regulated rectifiers are derived. Expressions relating the physical size of the components and the short circuit characteristic of the circuit to the output power, frequency, input power factor, and voltage levels are developed. Frem these expres…
icd Mutants of Escherichia coli K-12, selected for their resistance to nalidixic acid, are deficient in isocitrate dehydrogenase.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and reactions of novel bridged dicarbollide complexes having electron-deficient carbon atomsM. Frederick Hawthorne and James N. FrancisCite this: Inorg. Chem. 1971, 10, 3, 594–597Publication Date (Print):March 1, 1971Publication History Published online1 May 2002Pu…
During the past two decades, improved understanding of the fundamental magnetic behavior of Fe-Ni alloys has made them one of the most versatile class of soft magnetic materials. No longer is the concern limited to high permeability and low coercfve force at room temperature. Alloys have now been custom-crafted to mee…
Abstract At low levels of hydration, exchangeable D + in montmorillonite interacts with lattice OH groups and quantitatively converts AlMgOH groups to AlMgOD. Hydroxyl groups coordinated to two Al ions undergo a slower exchange, the extent of which is restricted by octahedral Fe 3+ ions. The OH stretching vibration of…
Abstract A method is given for the analysis of long‐chain branching in polymers by using combined GPC and intrinsic viscosity measurements. A computer program was written to evaluate branching indices by a tabular, iterative method. The method was applied to the evaluation of long‐chain branching in low‐density polyet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTShear Creep Studies of Narrow-Distribution Poly(cis-isoprene)Norio Nemoto, Motohiro Moriwaki, Hisashi Odani, and Michio KurataCite this: Macromolecules 1971, 4, 2, 215–219Publication Date (Print):March 1, 1971Publication History Published online1 May 2002Published inissue 1…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation C. S. TEDMON, D. A. VERMILYEA, D. E. BROECKER; Technical Note Effect of Cold Work on Intergranular Corrosi…
A molecular-field-type theory is given for the second-order phase transitions occurring in perovskite crystals, in which a Jahn-Teller (JT) ion (${\mathrm{Mn}}^{3+}$, ${\mathrm{Cu}}^{2+}$, ${\mathrm{Cr}}^{2+}$) occupies an octahedral $B$ site. The dynamic character of the JT effect is taken into account and excited vi…
Structural changes of yeast glyceraldehyde‐3‐phosphate dehydrogenase as a function of saturation with NAD have been measured with the X‐ray small‐angle scattering technique. Samples of yeast glyceraldehyde‐3‐phosphate dehydrogenase were investigated at pH 8.5 and 40° and five different degrees of saturation with the c…
Abstract The toughness and stress corrosion cracking characteristics of an epoxy resin (DER 332) hardened with hexahydrophthalic anhydride (HHPA) were investigated. The epoxy was studied in both the bulk and bond form, and its properties were compared with an amine‐hardened (tetraethylene pentamine, TEPA) system. The…
Neutron scattering experiments on ${\mathrm{Tb}}_{2}$ ${(\mathrm{M}\mathrm{o}{\mathrm{O}}_{4})}_{3}$ show the ferroelectric orthorhombic phase to result from a phonon instability at the (\textonehalf{}, \textonehalf{}, 0) Brillouin zone corner of the parent tetragonal phase. Anharmonic coupling to these antiferroelect…
Emission and absorption spectra have been determined for Rh(III) and Ir(1II) complexes of the nitrogen ligands, ethylenediamine (en) pyridine, 2,2′-dipyridyl (dip), and 1,10-phenanthroline (phen). Emission lifetimes at 77°K in glassy solution and at room temperature have been measured. From lifetime measurements and t…
The application of thyristor switching to induction motor speed control has resulted in a number of unconventional supply systems. One such technique, which has been successfully employed in a number of applications, is variable voltage control by means of symmetrically triggered thyristors in the stator phases of a w…
A detailed study of the static and dynamic critical behavior of the planar antiferromagnet ${\mathrm{K}}_{2}$Ni${\mathrm{F}}_{4}$ is reported. The dynamic experiments reveal several unusual features. Magnons over most of the Brillouin zone are observed to persist well above ${T}_{N}$. The magnons ultimately become uno…
Metallurgical efforts to develop a soft magnetic material suitable for application in the rotor of a generator or motor in advanced aerospace electric systems are reviewed. Commercial materials which have been considered include AISI 4340 steel, H-11 steel, Nivco alloy, and 15- and 18-percent Ni maraging steels. Devel…