Materials Literature
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The purpose of the QUENCH experimental program at the Karlsruhe Research Center is to investigate the hydrogen source term that results from quenching an uncovered core, to examine the physicochemical behavior of overheated fuel elements under different flooding/cooling conditions, and to create a database for model d…
By X-ray structure analysis it could be shown that from the solution equilibrium of pyochelin I and II, differing in the stereochemistry at C-2" (1a and 1b), crystals of the Fe3+ complex of the steroisomer 1a are formed with a 1:1 metal-to-ligand ratio. Ligand sites are the carboxylate and the phenolate anions and the…
Abstract The anthraquinone derivatives T‐x‐x ( x = 2, 4, and 8), possessing two cellobiosyl, cellotetraosyl, and cellooctaosyl chains, respectively, C ‐glycosidically bonded at C(1) and C(8) were synthesised as potential mimics of cellulose I. The anthraquinone template enforces a parallel orientation of the cellodext…
Kurzfassung Die Unterscheidung der verschiedenen Graphitmorphologien in Gusseisen erfolgte bisher im Wesentlichen qualitativ durch subjektiven Vergleich mit Richtreihenbildern. In Hochleistungsanwendungen im Motorenbau werden nunmehr objektive quantitative Messungen der jeweiligen Graphitanteile benötigt, damit die me…
The depolarization ratios in resonance Raman, resonance hyper-Raman and resonance hyper-Rayleigh scattering have been measured for two octupolar conjugated organic chromophores that possess nominal threefold symmetry, crystal violet (CV) and 1,3,5-tris[4-[(1E)-2-(4-nitrophenyl)-ethenyl]phenyl]benzene (TPB(PV)1(NO2)).…
The microphase-separation behaviors of two types of star-diblock copolymers (A)4(B)4 and (AB)4 are investigated through the dissipative particle dynamics (DPD). The simulated phase diagrams show similar ordered mesostructures as those of corresponding linear and cyclic ones, such as lamellas (LAM), perforated lamellas…
Reductive deselenation of selenodiazole-fused porphyrazines, followed by acylation of the resultant labile porphyrazinediamines, was used to prepare macrocycles bearing two Collins ligands, two oxamido residues, or two quinoline-2-carboxamido units. Peripheral coordination of copper(II) to the di-(quinoline-2-carboxam…
Hybrid fuel cell/gas turbine systems provide an efficient means of producing electricity from fossil fuels with ultra low emissions. However, there are many significant challenges involved in integrating the fuel cell with the gas turbine and other components of this type of system. The fuel cell and the gas turbine m…
The 1.23 and 1.47μm emission properties of Tm3+ in the low-phonon-energy Ge–Ga–Sb–S chalcogenide glasses were reported. Radiative parameters were calculated based on a Judd-Ofelt analysis and the laser actions of the transitions were analyzed. The 1.23μm transition has a branching ratio of 98.9%, a fluorescence lifeti…
The effects of surface pretreatment on the rate of scribe-creep caused by underpaint corrosion on coated AA2024-T3 (UNS A92024) were investigated. Scribe-creep experiments were conducted on epoxy polyamide-coated (average coating thickness: ~10 μm) AA2024-T3 in 80% relative humidity at 25°C, 40°C, and 50°C. Scribe-cre…
Abstract Covalent functionalization of multiwalled carbon nanotubes (MWNT) with poly(acrylic acid) has been successfully achieved via grafting of poly(acryloyl chloride) on nanotube surface by esterification reaction of acyl chloride‐bound polymer with hydroxyl functional groups present on acid‐oxidized MWNT and hydro…
Nous avons determine et affine la structure cristalline du compose Pb 8 O 5 (OH) 2 Cl 4 , synthetise par voie hydrothermale [monoclinique, C2/c, a 26.069(5), b 5.8354(11), c 22.736(4) A, p 102.612(6)°, V 3375.3(11) A 3 ], jusqu'a un residu R 1 de 0.047 avec des donnees prelevees sur un cristal macle sur (100). Il y a…
Edible film made from water-soluble fish proteins present in surimi wash-water were developed based on formulation conditions explored in a previous study. Type and concentration of plasticizer significantly ( p < 0.05) affected the mechanical and barrier properties of the films. Sorbitol (SOR) plasticized films we…
Oxygen bubble formation and evolution under a 300keV electron beam are analyzed in a Li borosilicate glass under different irradiation conditions: temperature, flux, and dose. Oxygen bubbles are observed to form in a delimited flux and temperature region with a threshold requirement. This region ranges between 100 and…
Abstract In the present paper, anode supported solid oxide fuel cells (SOFCs), produced on a pre‐pilot plant scale in ten batches of ∼100 cells, are characterised with respect to performance. The main purpose was to evaluate the reproducibility of the scaled‐up process. Based on 20 tests, the average area specific cel…
An electrochemical study of corrosion behavior for carbon steel in a solution like NACE TM0177 after adding pyridine derivatives is presented. Weight-loss measurements, as the modification of corrosion potentials toward less negative potentials (in linear polarization) in the presence of pyridine compounds, indicated…
Amorphous carbon nanotubes (a-CNTs) are synthesized by pyrolysis of ferrocene confined in the nanopores of the anodic alumina membrane (AAM) and characterized by field emission scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), electron energy-loss s…
The phosphors of red (Y,Gd)BO/sub 3/:Eu/sup 3+/, green Zn/sub 2/SiO/sub 4/:Mn/sup 2+/, and blue BaMgAl/sub 10/O/sub 17/:Eu/sup 2+/ (BAM) are widely being used in plasma display panels (PDPs). However, BAM deteriorates seriously during the panel processing and operation, resulting in a loss of efficiency and color puri…
The reversible addition-fragmentation chain-transfer polymerization was used to prepare microarray slides grafted with polymer brushes for DNA-based applications. Block copolymer brushes of N,N-dimethylacrylamide (DMA) and glycidyl methacrylate (GMA), poly(DMA-b-GMA) were prepared by extending living poly(dimethylacry…
The Indira Gandhi Centre for Atomic Research (IGCAR) conducts multidisciplinary programme of scientific research and advanced engineering for development of sodium - cooled Fast Breeder Reactor (FBR) technology in India. In the early days of IGCAR, the emphasis was on construction of a sodium - cooled 40 MWt Fast Bree…