Materials Literature
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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…
The stress corrosion cracking of sensitized stainless steels due to thiosulfate and tetrathionate has been associated with an increased rate of anodic dissolution in the active‐passive region of voltammetric scans, via the mutual sensitivity of both phenomena to a series of anionic inhibitors. The increased anodic dis…
Abstract Three series of segmented polyurethanes with different soft segment lengths and concentrations were examined by TMA, DMA, and mechanical methods. Maximum tensile strengths were obtained when ssc was 40–50%, which was explained by a specific interlocking morphology. No significant effect of soft-segment chain…
Permanent magnet compounds are basically ferromagnets with uniaxial anisotropy. In different cases, the magnets are elaborated by sintering of powders previously oriented and compressed under field. The value of the remanent induction Br is directly dependent on the degree of crystallites alignment, and we present in…
It must be first of all asked what rust really is. The question may seem to have an obvious answer. Anybody who has had anything at all to do with iron is acquainted with the effect of rust. Nevertheless, it has to be admitted that even a number of researchers who have dedicated themselves to the subject do not have s…
Clay subsoils were analysed by a procedure that uses a choline chloride reagent to distinguish double-layer exchangeable cations from other more strongly adsorbed forms extractable by an ammonium sulfate reagent. In those clay subsoils that contained little organic matter, the exchangeable cations made up nearly all o…
Action d'agents antimicrobiens dans des mousses de polyurethanne, polyester et PVC pour divers usages
Skinfold thickness was measured at five sites in 750 infants. The study population was unselected except that twin pregnancies and the infants of diabetic mothers were excluded, and very preterm infants were under represented. A pilot study had indicated that skinfold measurement was most reproducible at the thigh sit…