Materials Literature
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The chemisorption of CO on clean and oxidized Ir(110) has been investigated under ultra-high vacuum conditions with thermal desorption mass spectrometry, contact potential difference measurements, Auger electron spectroscopy, and LEED. On both surfaces, adsorption is nondissociative under all conditions examined, i.e.…
Evidence for phosphorylation of proteins by protein kinases has been found in Salmonella typhimurium despite previous indications that protein kinase action is absent in prokaryotes. At least four proteins have been found to be phosphorylated. Serine and threonine phosphates have been isolated from acid hydrolysates o…
The spectroscopic properties of dye monolayers on silver films were determined by using the technique of attenuated total reflection (ATR). The dyes N,N′-di(methyloctadecyl) squarylium and N,N′-dioctadecyloxacarbocyanine were deposited on silver films by the Langmuir–Blodgett monolayer technique. From a least squares…
Crystal growth and segregation in space were quantitatively investigated in a Bridgman‐type configuration. It was established that the segregation behavior is diffusion controlled without interference from residual gravity, G‐jitter, and surface tension gradients. Radial and longitudinal segregation effects were accou…
Abstract Green (cohesive) strength of Guayule rubber (GR) was determined and compared to that of natural rubber (NR). In the case of GR gum compounds the green strength was shown to be inferior to that of NR gum compounds; however, in the case of black compounds GR green strength was similar to that of NR. Green stren…
With triple-phase relationships treated as linear equations it is possible to refine a set of phases from given initial values. Phases so obtained are better than those found by refining to self-consistency with the tangent formula. An investigation of the radius of convergence of the least-squares refinement process…
Films of halide complexes of silver can be electrodeposited onto, or removed from, transparent indium tin oxide contacts in less than 10 msec using a clear liquid mixture of dimethyl sulfoxide (DMSO), silver halide, alkali metal halide, and bromine or iodine. The solutions do not attack the contacts, even at high volt…
In order to test some of the methods of archaeological bronze conservation, a procedure was perfected that reproduces the structure and composition of original patinas. Then the most common methods of treatment were applied on test samples thus prepared and on archaeological items. This experiment has allowed us to ch…
With high-resolution electron microscopy new crystal structures were found in the binary system of Nb 2 O 5 WO 3 oxides. The compounds are proposed to have the mole ratios 4Nb 2 O 5 . 22WO 3 and 4Nb 2 O 5 . 50WO 3 . The crystal structures are ascribed to intimate intergrowths of two known structures, the ReO 3 type an…
Suitable weighting schemes for use in tangent-formula phase development and refinement are discussed, and a statistically based weighting scheme, which can easily be incorporated in existing computer programs, is proposed. Examples of the use of this method in structure solution and completion are presented for a prev…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy of a copper(III) macrocyclic complexWilliam E. Keyes, William E. Swartz, Jr., and Thomas M. LoehrCite this: Inorg. Chem. 1978, 17, 11, 3316Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissu…
Form factors calculated from several theoretical models show that the Xα method is accurate to about 1%. With the latter scheme and the Watson-sphere model the atomic form factors for O 2- and N 3- are computed for varying sphere radii. To a first approximation this radial variation accounts for the different environm…
In model experiments under controlled conditions of pH, particle size and amount of glucose, changes in the free Fe oxides (Fe d ) and acid oxalate soluble Fe (Fe o ) of six soils were studied after inoculation with iron-reducing, nitrogen-fixing Clostridia. In all soils, the total amount of Fe d as well as crystallin…
Abstract Dans la série des composés de formule globale MSbS 2 NaSbs 2 Présente deux Variétés allotropiques, NaSbS 2 α obtenu par refroidissement lent jusqu' à la température ambiante est monoclinique, groupe d'espace C2/c, a = 8,232(1) Å, b = 8,52(2) Å, c = 6,836(1) Å, β, = 124. 28° (1), Z = 4. NaSbS 2 β obtenu par tr…
Two types of copper/water heat pipes have been developed for cooling of both the rotor and the stator of an asynchronous electric motor which shall be used as a high-performance locomotive drive. For the stator axial groove heat pipes are used with a slight liquid overfill. The rotor heat pipes have cirumferential gro…
Binder phase (primarily chloride or nitrate) formation was examined in YX 3 ‐NaOH‐H 2 O, Y 2 O 3 ‐acid‐H 2 O, and Y 2 O 3 ‐salt‐H 2 ‐O systems. The cementitious phase consisted mostly of plate‐ (or needle‐) shaped hydroxy salts of the general formula Y 2 (OH) 6‐m X m n H 2 O, where m and n normally equal one. These bi…
Elasticity, internal friction, and thermal expansion were measured at temperatures up to 1500°C to characterize the micro‐cracking behavior of HfO 2 . Crack‐free HfO 2 showed consistent, typical changes in these properties with temperature. Micro‐cracked HfO 2 showed hysteresis in the elastic moduli and thermal expans…
Hypertension, diabetes mellitus, hypercholesterolemia, and smoking are known coronary risk factors. It has been our impression that premature graying of the hair also predisposes individuals to myocardial infarctions. To test this hypothesis, we evaluated all of the patients under the age of 50 who were admitted to th…
The Lorentz force on an electron is utilised to separate out the electron component from the open beam of a Clinac-18, operating in the X-ray mode. The experimental arrangement is such that the mixed beam (comprising the primary photons, the scattered photons and the contamination electrons) enters an external magneti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRefinement of the crystal structure of orthorhombic zinc chlorideH. L. Yakel and J. BrynestadCite this: Inorg. Chem. 1978, 17, 11, 3294–3296Publication Date (Print):November 1, 1978Publication History Published online1 May 2002Published inissue 1 November 1978https://pubs.ac…