Materials Literature
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A study has been made of the precipitation and growth processes which occur during cooling from solution treatment and under isothermal hold conditions in a magnesia‐partially‐stabilized zirconia alloy. Three types of precipitate have been identified which develop during cooling or during isothermal hold treatments ju…
In an attempt to verify the recent proposal that the heme d1 prosthetic group isolated from cytochrome cd1 is not a chlorin, but a dioxo-isobacteriochlorin (Chang, C. K. (1985) J. Biol. Chem. 260, 9520-9522), a model dioxo-isobacteriochlorin has been synthesized possessing a pi-electron system exactly identical to tha…
The possibilities and limitations of analyzing by scanning electron microscopy wool blended with two unmedullated specialty fibers, mohair and cashmere, were studied. The measurement of the height of the cuticle scale at the scale edge was used as an objective criterion for distinguishing between the wool and the spec…
Structural investigation of cesium zinc monophosphate CsZnPO4 has been carried out at three different temperatures. At room temperature, this salt is monoclinic, P21/a with a = 18.33(8), b = 5.45(4), c = 9.25(6) Å, β. = 90.14(8)° and Z = 8 (form III):at 260°C, it becomes orthorhombic, Pn21a with a = 9.246(9), b = 5.46…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN7/06 chelation in a complex with an analog of guanine. Preparation, spectroscopic study, and crystal structure of bis(.eta.5-cyclopentadienyl)(theophyllinato)titanium(III)Daniel Cozak, Abdelhakim Mardhy, Marc J. Olivier, and Andre L. BeauchampCite this: Inorg. Chem. 1986, 2…
Pure zirconia fired in HCl shows greatly reduced shrinkage compared to the same material fired in air. One of the main microstructural differences is the much more rapid grain growth in the porous zirconia fired in HCl. The observed grain growth does not follow any simple growth law over the temperature range investig…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParamagnetic silver clusters in Ag-NaA zeolite: electron spin resonance and diffuse reflectance spectroscopic studiesJacek. Michalik and Larry. KevanCite this: J. Am. Chem. Soc. 1986, 108, 15, 4247–4253Publication Date (Print):July 1, 1986Publication History Published online…
Abstract The sorption and transport of CO 2 in miscible PVF 2 /PMMA blends are reported at 35°C as a function of pressure from 1 to 25 atm. Significant plasticization by CO 2 is evident for all blend compositions. This effect induced further crystallization of PVF 2 for some blends, altered the shape of sorption isoth…
In a previous study, we reported the apparent similarity between a low resolution electron density map of mitochondrial malate dehydrogenase and a model of cytoplasmic malate dehydrogenase (Roderick, S. L., and Banaszak, L. J. (1983) J. Biol. Chem. 258, 11636-11642). We have since determined the polypeptide chain conf…
A simple model of hopping transport in a molecularly doped polymer is described based on a small electric-field perturbation of diffusional (random walk) electron self-exchange reactions in the solid state. A master expression is derived which quantitatively accounts for the electrical field, temperature and concentra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA convenient synthesis of a "gable"-type porphyrinJonathan L. Sessler, Jeff Hugdahl, and Martin R. JohnsonCite this: J. Org. Chem. 1986, 51, 14, 2838–2840Publication Date (Print):July 1, 1986Publication History Published online1 May 2002Published inissue 1 July 1986https://p…
A Bacillus subtilis 2.7-kilobase DNA fragment containing an intracellular protease gene was cloned into Escherichia coli. The transformants produced an intracellular protease of approximately 35,000 Mr whose activity was inhibited by both phenylmethylsulfonyl fluoride and EDTA. Introduction of the fragment on a multic…
Many alkyl derivatives of carbohydrates are used as detergents for cell wall membranes. This study describes the liquid-crystalline properties of a number of these systems. The combination of a hydrophilic carbohydrate moiety and a hydrophobic aliphatic substituent leads to the formation of both thermotropic and lyotr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and NMR studies of pentacoordinated silicon anionsRobert Damrauer and Stephen E. DanaheyCite this: Organometallics 1986, 5, 7, 1490–1494Publication Date (Print):July 1, 1986Publication History Published online1 May 2002Published inissue 1 July 1986https://pubs.ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIn situ generated colloidal semiconductor cadmium sulfide particles in dihexadecyl phosphate vesicles: quantum size and symmetry effectsYves M. Tricot and Janos H. FendlerCite this: J. Phys. Chem. 1986, 90, 15, 3369–3374Publication Date (Print):July 1, 1986Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase behavior of amorphous binary mixtures of perdeuterated and normal 1,4-polybutadienesF. S. Bates, G. D. Wignall, and S. B. DierkerCite this: Macromolecules 1986, 19, 7, 1938–1945Publication Date (Print):July 1, 1986Publication History Published online1 May 2002Published…
The electron-spin resonance g value, linewidth, line shape, and spin susceptibility of single crystals of the \ensuremath{\alpha} and \ensuremath{\beta} phases of di[bis(ethylenedithiolo)tetrathiafulvalene]triiodide [(BEDT-TTF${)}_{2}$${\mathrm{I}}_{3}$] are each found to show marked temperature and angular dependence…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical study of the heats of formation of Si2Hn (n = 0-6) compounds and trisilanePauline Ho, Michael E. Coltrin, J. S. Binkley, and C. F. MeliusCite this: J. Phys. Chem. 1986, 90, 15, 3399–3406Publication Date (Print):July 1, 1986Publication History Published online1 Ma…
The structure of bovine intestinal calcium-binding protein (ICaBP) has been determined crystallographically at a resolution of 2.3 A and refined by a least squares technique to an R factor of 17.8%. The refined structure includes all 600 non-hydrogen protein atoms, two bound calcium ions, and solvent consisting of one…
Since Thewlis found the "two fiber axes" patterns on x-ray diffractograms of human enamel in 1934, many investigators have studied this problem. However, a definite answer has not yet been obtained. The present detailed x-ray diffraction study showed that the "two fiber axes" patterns in human enamel were caused by re…