Materials Literature
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The surface chemistry, oxidation, and disolution kinetics of titanium were measured to establish the mechanisms of passive dissolution in physiological environments. Titanium thin films were immersed in 8.0 mM ethylenediamine-tetraacetic acid in simulated interstitial electrolyte (EDTA/SIE) and maintained at 37 degree…
The upconversion properties of ${\mathrm{Er}}^{3+}$ ions were studied for the fluorophosphate glasses (45-x)${\mathrm{AlF}}_{3}$\ensuremath{\cdot}x${\mathrm{AlPO}}_{4}$\ensuremath{\cdot}${5\mathrm{E}\mathrm{r}\mathrm{F}}_{3}$\ensuremath{\cdot}${30\mathrm{C}\mathrm{a}\mathrm{F}}_{2}$\ensuremath{\cdot}${20\mathrm{B}\mat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA kinetic investigation of the lanthanide DOTA chelates. Stability and rates of formation and of dissociation of a macrocyclic gadolinium(III) polyaza polycarboxylic MRI contrast agentXiangyun Wang, Tianzhu Jin, Vinciane Comblin, Antonio Lopez-Mut, Emile Merciny, and Jean F.…
Two series of site-directed mutations to the individual Ca(2+)-binding sites of Drosophila melanogaster calmodulin have been generated and studied. In each mutant, a conserved glutamic acid residue at position 12 in all of the Ca(2+)-binding loops has been mutated in one site. In one series the residue is changed to g…
Site-specific substitutions of arginine for lysine in the thermostable D-xylose isomerase (XI) from Actinoplanes missouriensis are shown to impart significant heat stability enhancement in the presence of sugar substrates most probably by interfering with nonenzymatic glycation. The same substitutions are also found t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOligothiophene cation radical dimers. An alternative to bipolarons in oxidized polythiopheneMichael G. Hill, Kent R. Mann, Larry L. Miller, and Jean Francois PenneauCite this: J. Am. Chem. Soc. 1992, 114, 7, 2728–2730Publication Date (Print):March 1, 1992Publication History…
Light-scattering studies of the liquid-glass transition of ${\mathrm{Ca}}_{0.4}$${\mathrm{K}}_{0.6}$(${\mathrm{NO}}_{3}$${)}_{1.4}$ have been carried out from 305 to 23\ifmmode^\circ\else\textdegree\fi{}C. Composite spectra covering over four decades in frequency were obtained by combining data obtained with a Sanderc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe role of analysis in the rate processesStuart W. ChurchillCite this: Ind. Eng. Chem. Res. 1992, 31, 3, 643–658Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.org/doi/10.1021/ie00003a002http…
A cement-talc-chamotte refractory mixture was dosified by subjecting the same to thermal shock. To this end, specimens compacted to 350 Kg/cm2 through compression as well as specimens compacted manually were prepared. All the specimens were submitted to an initial working temperature of 1000ºC and then left to cool do…
The white marble from Macael quarries (Almería, Spain) has been identified in some monuments of the Southern of Spain; the use of other white marble types has also been confirmed. The microchemical identification has been carried out by means a previously described graphical method (Bello and Martín,1991). Fourteen tr…