Materials Literature
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The crystal structure of yeast orotidine 5'-monophosphate decarboxylase (ODCase) complexed with the inhibitor 6-hydroxyuridine 5'-phosphate (BMP) reveals the presence of a series of strong interactions between enzyme residues and functional groups of this ligand. Enzyme contacts with the phosphoribofuranosyl moiety of…
An alternative process for the manufacture of powder coatings was developed. The continuously operated process is applicable to new (low-melting and fast-reacting) and conventional powder coating systems and allows to produce coatings with improved properties. The process uses the solubility of compressed gases in mel…
In this paper, the method of discrete dislocation plasticity (DDP) is extended to include explicitly the thermal effects of moving dislocations. In this manner, localization of heat during fast deformation can be calculated exactly. The thermal effects included are the thermal dissipation due to dislocation drag, the…
We develop a phenomenological theory of oxygen-ion-conducting porous cermet anode for solid oxide fuel cells utilizing hydrogen, based on a simple picture of macro- and microkinetics of charge and gas transport in the cermet. Its basic equations account for the transport of hydrogen molecules and oxygen anions to the…
The exchange interactions between copper ions in ( l -tryptophyl-glycinato)copper(II), C 13 H 13 CuN 3 O 3 (named Cu(II)Trp-Gly) are determined by ac magnetic susceptibility and dc magnetization measurements in powder samples, and by EPR measurements in single-crystal samples. The copper ions in this compound are arra…
Formation of surface‐induced precipitates may play an important role in the immobilization of Ni and other metals in nonacidic soils. To investigate the influence of commonly present organic ligands on precipitate formation, we monitored the uptake of Ni by gibbsite and pyrophyllite in the presence of citrate and sali…
Abstract The present paper describes the comparative study of a continuous ultrasonic devulcanization of ground tire rubber (GRT) using two reactors. The devulcanization zone in the first reactor (coaxial reactor) is located at the exit from an extruder without imposition of additional shearing. In the second reactor…
Abstract The prevention and treatment of crystal deposition in the human body are based on the understanding of the physicochemical properties underlying the precipitation of the substances involved. Among these properties, the solubilities of the crystals are very important. Recently, experimentally determined solubi…
Band shifts in Raman spectra were used to assess, on a microscopic scale, the residual strain existing in Hi‐Nicalon silicon carbide fibers reinforcing celsian‐matrix composites. Uncoated as well as p‐BN/SiC‐coated and p‐B(Si)N/SiC‐coated Hi‐Nicalon fibers were used as the reinforcements. We unambiguously conclude tha…
The first successful alignment of helix axes of chiral nematic liquid crystals (LCs) by the photoalignment technique is reported here. The helix axis aligns perpendicularly to the propagation direction of the incident non-polarized light. Dark and bright images (see Figure) of the aligned helix axis of a chiral nemati…
The morphology, taxonomy and distribution of Thalassionema (six species), Thalassiothrix (five species), Trichotoxon (one species) and Lioloma (three species) are examined. They are needle-shaped diatoms ranging in size from a few μm to several millimetres. Colony formation is represented in all genera but apparently…
Conoscopy as an optical method for accurate measurement of crystal tilt angles from interference figures is analyzed for the special case of uniaxial crystals. The displacement of interference figures is related to the crystal tilt angle in an explicit, noniterative manner that is accurate to within ~2%. The analysis…
Multilayered nanocomposite films were prepared from aluminosilicate platelets with functional chromophores and polyelectrolytes through electrostatic layer-by-layer assembly. Fluorescent dye coumarin was intercalated into the layered aluminosilicate hectorite, and the resulting hectorite/coumarin intercalation complex…
Our previous work demonstrated that proteases are effective scouring agents for boiling-water pretreated cotton fabrics. In this study, we investigate whether proteases are effective scouring agents when directly applied on raw greige cotton fabrics without the boiling water pretreatment. Direct reactions with three p…
Three fluoropolymer latices, two of them commercially available and the third synthesized as a reference material, are applied by padding to wool, cotton, and polyester fabrics, and their performance is evaluated by means of technological standard test methods for water repellency, oil repellency, fabric hand, and mec…
Wetting phenomena are theoretically studied for a slit pore or slab geometry between two structured surfaces which contain stripes of lyophilic surface domains. Two different approaches are used and compared: Monte Carlo simulations of lattice gas models and minimization methods applied to effective interface models.…
The successful preparation of novel thin nanocomposite films containing continuous periodic arrays of self-assembled silver nanocrystals in a polystyrene (PS) matrix is reported in this communication. The Figure shows a photo of a thin nanocomposite Ag–PS film supported by a wire loop. The simple and rapid synthetic p…
SUMMARY In the Soom Shale, labile soft tissues have been replaced rapidly after death by authigenic clay minerals which now have an illitic composition. There are two possible pathways for this mineralization: (1) initial replacement of soft tissue by kaolinite which was then diagenetically transformed to illite; or (…
FTIR and EPR of adsorbed probe molecules were used to study Lewis acid sites in FAU and MFI zeolites with different nonframework Al content. Infrared spectra of adsorbed CO at low temperatures give information about all types of sites. The absorption bands were assigned to CO fixed on Brönsted sites, cations, and true…
Atomistic simulations using a modified generalized pseudopotential theory potential and Green's function boundary conditions were employed to determine the Peierls stress of rigid straight (a/2)〈111〉 screw dislocations for the application of shear stresses on {110}- and {112}-type planes in bcc Mo. It is found that th…