Materials Literature
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An electrooptic effect in the blue phase of the cholesteric mixture S811- and the nematic mixture N5 is reported. To demonstrate this effect ac voltages (f = 1000 Hz) between 0 and 150 V were applied. Wavelength shifts of 70 nm were obtained.
This article is concerned with the extension of the Renkin-Crone model to a case of saturable transport across the blood-brain barrier, i.e., when the apparent permeability-surface area product is concentration dependent. A well-mixed tissue compartment is assumed, together with a simple symmetric saturable transport…
NO2 does not appear to be a primary product in the oxidation of copper metal by nitric acid.
Implications of the hydridation of the ternary borides RE2Fe14B on the physical, crystal structure and mechanical cohesion are discussed. Some examples are given, more particularly with RE = Y, Ce, Dy.
The chemical processes by which tritium can be converted to tritiated water have been examined by reviewing the available literature on these processes. Gas phase conversion reactions at room temperature are slow and they do not contribute significantly to any observed conversion following releases of elemental tritiu…
Issues are discussed that are critical in determining tritium loss from helium-cooled fusion breeding blankets. These issues are: (a) applicability of present models to permeation at low tritium pressures, (b) effectiveness of oxide layers in reducing permeation, (c) effectiveness of hydrogen addition as a means to lo…
Calculations for the magnetic dipolar contribution to the magnetic anisotropy of BaFe12O19 and LaFe11ZnO19 M-type and BaFe4Mn2O11 R-type hexagonal ferrites have been made. Our calculations take into account all the magnetic moments existing within a sphere with a radius of 118 Å, from which good convergence is reached…
The Peierls instability of a one-dimensional metal to a distortion of the lattice that opens a gap in the electronic spectrum at the Fermi energy, E F, has been extensively investigated in a wide range of low-dimensional conductors in the past decade. This field has provided a very rich range of new physics; these inc…
X-ray photoelectron spectroscopy has been employed to study the effect of CF 4 rf plasmas on gold surfaces. The data indicate that the CF 4 plasma converts the inert gold surface into a chemically active surface composed of gold, gold oxide, and gold fluoride. Upon exposure to air, the gold fluoride is hydrolyzed. The…
Abstract The strongest lines in the X-ray powder diffraction pattern of type material of glaucocerinite from Laurion (Greece), indexed on a hexagonal pseudocell, are 10.9 (100) (003), 5.45 (90) (006), 3.63 (80) (009), 2.62 (60) (012), 2.46 (60) (015), 2.231 (50) (018), and 1.981 Å (50) (0.1.11). The pseudocell paramet…
This report is the content of a poster showing:- crystallographic analysis- phase diagrams in Pd-alloy/H2, D2 systems- diffusivity of 3He in Pd-alloy membrane- problems for tritium compatible design of Pd-diffuser- review of the past work done by authors
Abstract Sequential interpenetrating networks (IPN's) were obtained from a tetrafunctionally end‐linked network [prepared from hydroxyl‐terminated poly(dimethylsiloxane) (PDMS) chains having a number‐average molecular weight of 21.3 × 10 3 g mol −1 ] by swelling it with very short vinyl‐terminated PDMS chains (∼450 g…
Abstract Three ion exchange equilibrium isotherms between muscovite-paragonite solid solution and 2-molal KCl-NaCl aqueous solutions have been studied at (1) 420°C 1 kbar, (2) 420°C, 2 kbar, and (3) 550°C, 2 kbar. The Δ G °(Joules) ± 2σ of the ion exchange reaction are: Δ G ° (1) = −17 259±686, Δ G ° (2) = −18 268 ± 5…
Polyclonal antihuman alpha-thrombin antibodies produced in rabbits reacted minimally (less than 0.05%) in solution with human prothrombin. However, when prothrombin was adsorbed to artificial surfaces such as polyvinyl chloride (PVC), the cross-reactivity of surface-bound prothrombin with antibody IgG to thrombin (gre…
Crystallographic texture is one of the major factors affecting magnetic permeability of steels at flux densities\geq;1.5T. It is known that texture formation, and hence, permeability is significantly impacted by the precipitation of retained alumninum and nitrogen as AlN at sub-grains or cold-worked grain boundaries p…
Hydrolyzed Collagen is a hydrolysate derived from animal byproducts. It is used in cosmetic products as a conditioner or moisturizer at concentrations less than 5 percent. Hydrolyzed Collagen was practically nontoxic when administered orally or dermally in acute animal toxicity studies. This ingredient was minimally i…
The rates of ab/desorption of water vapor for Zr-V-Fe getter were investigated by means of mass analyzed thermal desorption spectroscopy. The absorption rate obeyed first order kinetics with respect to the pressure of water vapor. The activation energies for absorption were determined as 1.8 (H2O), 2.7 (D2O), and 3.2…
Carburization is a major mode of corrosive degradation of high chromium alloy materials in many high temperature processes. The process generally involves the transfer of carbon from the gas phase onto the alloy surface followed by diffusion of carbon to the alloy interior with concurrent precipitation of chromium‐ric…
Investigations of helium effects in metals at the Savannah River Laboratory have been carried out by introducing helium by radioactive decay of tritium. This process does not create concurrent radiation damage, such as accompanies ion implantation and (n,α) reactions. The process has its own peculiarities, however, wh…
The fuel fragmentation is one of the important subjects in the field of molten fuel-coolant interaction (MFCI) since it is one of basic processes of the MFCI, and it has not yet been made clear enough. Accordingly, U02 fuel fragmentation was studied in a postulated reactivity initiated accident (RIA) condition by the…