Materials Literature
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We study the structure of diffusive layers in solutions of unstable nonlinear diffusion equations. These equations are regularizations of the forward‐backward heat equation and have diffusion coefficients that become negative. Such models include the Cahn‐Hilliard equation and the pseudoparabolic viscous diffusion equ…
A two-dimensional computational fluid dynamics model is developed to simulate the flow patterns inside the transportation zone of a rotor spinning machine and analyze their effects on yarn properties. The strength and area of recirculation at the inlet of the transfer channel caused by the geometric variation and rota…
To make universal and efficient liposome-based drug carriers, liposomes should be able to recognize and bind other targets beyond their natural targets, the cells of the reticuloendothial system. To make liposomes targeted, numerous methods to couple active substances, primarily, monoclonal antibodies, to the liposome…
Electrochemical properties of corroding mild steel (MS) surfaces were measured in real time using three closely spaced microelectrodes. Dissolved oxygen, pH, and ion currents were mapped simultaneously and noninvasively above a MS coupon partially coated with biopolymer gels. Calcium alginate (Ca-Alg [an extracellular…
Organotin compounds were used successfully to prepare highly oriented SnO 2 thin films on glass substrates. Spray pyrolysis of tetra‐n‐butyltin(IV) and di‐n‐butyltin(IV) diacetate led to the deposition of [110]‐ and [200]‐oriented SnO 2 films, respectively. The oriented growth of these thin films occurred via three st…
The idea of solving unknown crystal structures from experimental electron-diffraction intensities and high-resolution electron micrographs has remained a controversial topic in the 60 year history of electron crystallography. In this review it will be shown that the application of modern direct phasing techniques, fam…
ZnO films doped with 4, 7 and 13 wt% Ga 2 O 3 (GZO films) have been deposited on glass and quartz substrates using a pulsed laser deposition technique with an ArF laser (λ=193 nm). In all experiments, a repetition rate of 10 Hz, an energy density of 1 J/cm 2 , and an irradiation time of 20-30 min (12000-18000 shots) w…
Subunit-hybrid enzymes of mutant tetrameric L-lactate dehydrogenases from Bifidobacterium longum were studied in an examination of the mechanism of allosteric activation by fructose 1,6-bisphosphate. We earlier developed an in vivo method for subunit hybridization in Escherichia coli and the hybrids formed were a mixt…
Abstract Microcellular polyurethane foams are generated through phase separation, which is induced by reaction‐induced crosslinking or by a pressure quench. The phase separation conditions are shown to impact the microstructure of the foams. Pore growth will occur through two mechanisms: diffusion of CO 2 from polymer…
The solubility of phenacetin was determined at five temperatures in solvent mixtures of aprotic-amphiprotic mixtures of dioxane and water. Enthalpy-entropy compensation analysis is used to study the effect of changing polarity of the medium on the solute. The apparent heats of solution and free energies of solution ar…
We report a simple technique for fabricating a layer of isolated Si quantum dots on SiO2 glass substrates. This technique uses conventional low-pressure chemical-vapor deposition for an extremely short deposition time in the early stage of poly-Si film growth. The layer after a deposition time of 60 s has isolated Si…
Constant‐load creep‐rupture tests were performed on single Si‐C‐O fibers (Nicalon). Test environments included pure carbon monoxide (CO), pure argon gas, and a mixture of CO and argon gas with a CO partial pressure of 40 kPa. Fibers were tested at temperatures of 1200°‐1400°C and at nominal applied stresses of 0.15–0.…
We have measured the thermopower ($S$) of hole-doped LaMn${\mathrm{O}}_{3}$ systems in order to see its dependence on the ${\mathrm{Mn}}^{4+}$ content as well as to investigate other crucial factors that determine $S$. We have carried out hole doping (creation of ${\mathrm{Mn}}^{4+}$ by two distinct means, namely, by…
The stability of the so-called “gyroid” phase, of $$Ia\bar 3d$$ symmetry, observed for lyotropic liquid crystals and block copolymers is accounted for using the Landau-Brazovskii theory of weak crystallization. In the mean field approximation, the $$Ia\bar 3d$$ phase is stable between the lamellar and hexagonal phases…
The internal conversion and intramolecular vibrational relaxation processes of nitro-tri-tert-butylphthalocyanine, tetra-phenylporphyrin (TPP), and tetra-tert-butylphthalocyanine (BuPc) in chloroform solution were investigated with an ultrafast time-resolved fluorescence depletion method. A regular fluorescence deplet…
A rise in thermal denaturation temperature has been utilized as an indication of stabilization of collagen-containing materials such as pericardial tissue and porcine heart-valve leaflets following treatment with glutaraldehyde, Denacol, or other chemical agents. In contrast, stabilization of bovine pericardial tissue…
Localized adsorption of hard (noninteracting) spheroidal particles on homogeneous interfaces was analyzed theoretically. In contrast to previous studies concentrated on flat (side on) adsorption in the present approach an unoriented (quasi-three-dimensional) adsorption of prolate and oblate spheroids was considered. B…
RATIONALE AND OBJECTIVES: The relative stability and selectivity of magnetic resonance (MR) imaging contrast agents were compared with in vitro transmetallation and ligand competition reactions. MATERIALS AND METHODS: A gadolinium (Gd)-DTPA-BIGA, Gd-DTPA-BMA, Gd-DTPA, or Gd-HP-DO3A solution was mixed with an equimolar…
The optical performance of interference filters depends on systematic and statistical variations of the thicknesses and indices of refraction of the layers that occur during production and use. Assuming that their distributions are known, the expected performance can be optimized as a function of the nominal layer thi…
Other| October 01, 1996 Neutron powder diffraction study of hydrogarnet to 9.0 GPa George A. Lager; George A. Lager University of Louisville, Department of Geography and Geosciences, Louisville, KY, United States Search for other works by this author on: GSW Google Scholar Robert B. Von Dreele Robert B. Von Dreele Los…