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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis- and tris(tetrathiafulvalenes) (TTFs) derived from reactions of the TTF-thiolate anionMartin R. Bryce, Gary J. Marshallsay, and Adrian J. MooreCite this: J. Org. Chem. 1992, 57, 18, 4859–4862Publication Date (Print):August 1, 1992Publication History Published online1 May…
Abstract X-ray diffraction patterns were obtained from rock fragments, < 1 μ m randomly oriented freeze-dried powders, and < 1 μ m oriented aggregates for 11 mixed-layered illite/smectite samples (K-bentonites) that cover the range from 14 to 100 percent expandable. In all cases, 00 l and hkl comparisons show no…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation P. Valkó, M. J. Economides; Volume equalized constitutive equations for foamed polymer solutions.…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium constants and the prediction of phase behavior for phenoxy blends with aliphatic polyestersMichael M. Coleman, Xiaoming Yang, Paul C. Painter, and John F. GrafCite this: Macromolecules 1992, 25, 17, 4414–4424Publication Date (Print):August 1, 1992Publication Hist…
We have made a systematic survey of the behavior of colloidal polystyrene latex spheres (PLS's) in critical mixtures of 2,6-lutidine plus water at temperatures where the liquid mixture separates into two immiscible phases. By varying the particle size, particle-surface charge density, and global PLS's concentration, w…
High-spatial-frequency, surface-relief binary gratings have been shown to have diffraction properties that are similar to homogeneous layers of equivalent refractive indices, which depend on the grating characteristics, angle of incidence, and polarization. Thus these gratings in the long-wavelength limit could be use…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-modulus polyethylene fiber structure as shown by x-ray diffractionDavid T. Grubb and Keshav PrasadCite this: Macromolecules 1992, 25, 18, 4575–4582Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Published inissue 1 August 1992https:/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSub-picosecond .DELTA.S = 2 intersystem crossing in low-spin ferrous complexesJames K. McCusker, Kevin N. Walda, Robert C. Dunn, John D. Simon, Douglas Magde, and David N. HendricksonCite this: J. Am. Chem. Soc. 1992, 114, 17, 6919–6920Publication Date (Print):August 1, 1992…
Abstract The application of ultrasonic‐wave energy for the destruction of low concentrations of carbon tetrachloride into nonhazardous end products is described, and the results of experimental work are presented. Process parameters studied included steady‐state temperature, concentration, pH, irradiation time, and th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic-inorganic hybrid materials. 1. Hydrolysis and condensation mechanisms involved in alkoxysilane-terminated macromonomersFrancoise Surivet, Lam Thanh My, Jean Pierre Pascault, and Pham Quang ThoCite this: Macromolecules 1992, 25, 17, 4309–4320Publication Date (Print):A…
A literature review was performed to identify test methods that have been used to examine pitting susceptibility of stainless steels and nickel-base alloys in chloride (Cl–) containing environments. Several techniques were identified and a critical discussion of the electrochemical methods is provided with special att…
In Escherichia coli, p-aminobenzoate (PABA) is synthesized from chorismate and glutamine in two steps. Aminodeoxychorismate synthase components I and II, encoded by pabB and pabA, respectively, convert chorismate and glutamine to 4-amino-4-deoxychorismate (ADC) and glutamate, respectively. ADC lyase, encoded by pabC,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic behavior of nickel(II)-imino nitroxide derivativesDominique Luneau, Paul Rey, Jean Laugier, Elie Belorizky, and Andre CogneCite this: Inorg. Chem. 1992, 31, 17, 3578–3584Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Publis…
The statistical evolution of a two-dimensional polygonal, or ‘dry’, foam during diffusion of gas between bubbles lends itself to a very simple mathematical description by combining physical principles discovered by Young. Laplace, Plateau, and von Neumann over a period of a century and a half. Following a brief review…
Following the first determinations of protein structures in the late 1950s and the early 1960s (see for example Kendrew et al. 1960; Perutz, 1964), the three-dimensional structures of several hundred proteins have been elucidated by X-ray diffraction on single crystals. By the end of 1991, approximately 150 entries of…
Abstract The source and the effects of strain‐induced heating on the stress‐strain behavior and corresponding cold drawing process of glassy polymers are investigated. The nature of dissipative and stored components of work are discussed where only 50 to 80% of the mechanical work of glassy polymers has been found to…
The purpose of this paper is to describe the response of an aligned, lubri cated fiber bundle to a general state of three-dimensional stress. Such an element can be used to represent an advanced composite during manufacturing. In general, this bundle can deform by both viscous shearing, and by "cylindrical" modes of e…
NAD(+)-dependent isocitrate dehydrogenase from Saccharomyces cerevisiae is composed of two nonidentical subunits, designated IDH1 and IDH2. The gene encoding IDH2 was previously cloned and sequenced (Cupp, J.R., and McAlister-Henn, L. (1991) J. Biol. Chem. 266, 22199-22205), and in this paper we describe the isolation…
Abstract The processing of a new series of liquid crystalline (LC) epoxy networks was evaluated. Above the glass transition temperature, the low crosslink density networks could be mechanically aligned. The mechanically oriented networks readily lost orientation upon heating. Highly anisotropic liquid crystalline (LC)…