Materials Literature
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Ester-disazo dyes having perfluorobutyl and diethylamino groups in their molecules have been prepared. Their absorption maxima were observed in the range λ = 483–529 nm in a liquid crystal solvent. The solubility in terms of dye structure was in the order: monoesterdisazo >trisazo >diester-disazo. The solubility of th…
Superpermeable membranes based on Group Va metals can be applied in fusion devices for a short way separation of D/T mixtures from He, for an active control of particle fluxes and as a general-purpose D/T pump that may be used in particularly in tritium handling systems. Superpermeable membranes being used for D/T sep…
The crystal structure of leightonite, K 2 Ca 2 Cu(SO 4 ) 4 ·2H 2 O, C2/c, a = 11.654(2), b = 7.497(1), c = 10.097(1) Å; b = 125.21(1)°, V = 720.8(2) Å 3 , Z = 2 has been solved by direct methods and refined to R = 3.90% for 1564 F o > 4σ(F o ), using MoKα X-ray data from a crystal twinned on {201̅}. Structural sub-…
This study e valuates the dimensional changes of steam-ironed plain knitted wool fabrics after conditioning in air and then washing with an IWS 7A wash cycle. During steam ironing, different extensions are given to the fabrics by using larger sized ironing boards. Part of the expansion of the fabrics is recovered duri…
Polymers molecules in solution or melt are more or less flexible and continuously change their shape and size. Thus, characteristic properties of the system fluctuate around statistical mean values which are dependent on the concentration of the solution, on the quality of the solvent used, and on the specific structu…
The dynamics of the chain junctions in a lamellar diblock copolymer melt around the order-disorder transition temperature (ODT) has been investigated by neutron spin echo (NSE) spectroscopy, utilizing deuterated diblock copolymers with a hydrogen-labeled section at the junction point. We observed a dynamic response wh…
H NMR Spectral Simplification with Lanthanide Shift Reagents. II. Thiamylal, 5-Allyl-5-(1-methylbutyl)-2-thiobarbituric Acid
JAERI has been developing an improved compact tritium gas enrichment/recycling system to handle relatively smaller amount of tritium for efficient researches on tritium processing and development work. An electrochemical hydrogen pump based on CaZr0.9In0.1O3− α proton conductor is investigated to separate hydrogen iso…
The chloroiron(III) complexes of the partially peripherally crowded 2,3-diethyl-2,3,12,13-tetraethyl-, 2,3,7,8-tetraethyl-, and 2,3,7,8,12,13-hexaethyl-5,10,15,20-tetraphenylporphyrins have been synthesised and their X-ray structures have been determined. The porphyrins present in these molecules are non-planar and as…
For the safe and trouble-free operation of a manufacturing plant and the safe storage of acrylic, as well as methacrylic monomers, it is important to know the polymerization stability as a function of the process parameters (temperature, oxygen concentration, and impurities, e.g., metal ions). Contamination with metal…
A novel asymmetrically substituted amphiphilic phthalocyanine, 1,4-di(2-hydroxyethoxyl)-8,9,16,17,23,24-hexapentyloxylphthalocyaninozinc ( asy - PcZn ), was synthesized. It can be deposited as well-ordered LB films. Significant structural changes of the films were observed by UV-vis absorption spectra and low-angle X-…
CEA/Valduc has developed a Thermal Cycling Absorption Process (TCAP) experimental device dedicated to the study of the separation of hydrogen isotopes and particularly to the recovery of tritium from low concentrated mixtures (tritium molar fraction < 6%). Simultaneously an original and efficient dynamic simulation to…
Thermoanalytical measurements (DTG-DTA-MS), X-ray diffraction (XRD), temperature-programmed reduction (TPR), redox titration and X-ray photoelectron spectroscopy (XPS) were used to characterize A1–xSrxMnO3 perovskite catalysts (A = La, Nd, Pr, Di [didymium]). The catalyst samples were investigated before and after int…
This paper deals with the matters that impact the dielectric status of porcelain and glass insulators in a string containing broken and/or defective units that will be exposed to switching overvoltage. Flashover voltages are shown to depend on the position and number of defective units in the string. Complete understa…
The magnetic and structural properties of LaCo5-based LaxCo100−x (x=17–22) alloys have been studied in powders synthesized by mechanical milling and subsequent annealing. A record high coercivity (over 1.7 T) with a Mr/Ms ratio about 0.7 (measured at room temperature) has been obtained in La22Co78 powders. Their micro…
Abstract The mechanical properties of hybrid (commingled) yarn based reinforced thermoplastics depend on many parameters of the fiber components as well as of the different technological conditions during the commingling and the hot press molding. Among the fiber parameters the diameter ratio of the matrix and the rei…
The influence of temperature and gas composition on hydrogen isotope separation factors of membrane cascade with reflux ratio of 0.9998 and different palladium alloy membranes were studied. Separation factors for H-D mixture with different palladium alloy membranes varies from 1.31 to 1.42 at different temperatures, a…
Metal hydrides offer safe, compact and efficient ways to process tritium in areas including storage, pumping, compression, transportation and purification. Westinghouse at Savannah River Site in USA has developed and implemented metal hydride based technology for various tritium applications over the past 20 years. Th…
In order to investigate tritium behavior in tokamak, we have measured surface distributions of deuterium and tritium on graphite limiter tiles used in TEXTOR under D-D operation by means of an ion beam analysis and tritium imaging plate technique, respectively.It was found that both distributions were quite different,…
The relaxation time distribution function F (τ) is calculated in the framework of the random-field theory. The function F (τ) is expressed through the distribution function f ( E ) of a random electric field E with due regard for the derived dependence of the relaxation time τ on the electric field. The distribution f…