Materials Literature
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Chitosan microspheres were employed as adsorbent in aqueous medium for the reactive orange 16 containing the vinylsulfone group. Adsorption isotherms were obtained varying pH, contact time, and initial concentration of the dye in the solution. The results from the adsorption experiments were analyzed using Langmuir's…
The blue tetranuclear CuII complexes {[Cu(bpy)(OH)]4Cl2}Cl2 · 6 H2O (1) and {[Cu(phen)(OH)]4(H2O)2}Cl4 · 4 H2O (2) were synthesized and characterized by single crystal X-ray diffraction. (1): P 1 (no. 2), a = 9.240(1) Å, b = 10.366(2) Å, c = 12.973(2) Å, α = 85.76(1)°, β = 75.94(1)°, γ = 72.94(1)°, V = 1152.2(4) Å3, Z…
The immobilization of [Rh(cod)OCH3]2 (cod = cycloocta-1,5-diene) on mesoporous molecular sieves MCM-41 provides the first inorganic-type hybrid catalyst, which affords heterogeneous polymerization of phenylacetylene and its ring-substituted derivatives, – 2-fluorophenylacetylene, 4-fluorophenylacetylene, and 4-pentylp…
The diversity of eucaryotic picoalgae in three Swiss lakes was characterized by light microscopy and these observations were compared with analyses of SSU rDNA sequences. The phylogenetic analyses suggested that seven of the eight investigated strains were either related to Choricystis (Trebouxiophyceae) or Mychonaste…
The growth of an anodic oxide film on a specimen consisting of a layer of aluminum deposited upon a layer of tungsten was examined by transmission electron microscopy. The findings reveal initial growth of anodic alumina, followed by penetration of the alumina by fingers of tungsten oxide once the metal/film interface…
Abstract The processability of single bubble polyamide 11 and polyamide 12 films was investigated. The development of crystalline structure and chain orientation of polyamide 11 and polyamide 12 films in single bubble film blowing was studied by differential scanning calorimetry (DSC), wide angle X‐ray diffraction (WA…
A new concept of Ceramic Matrix Composite (CMC), mainly based on the use of a self–sealing technology for matrix and the use of a multilayer woven reinforcement, has been developed by Snecma for achieving high performance levels targeted by future jet engines. The driving force for this development has been to increas…
Magnesium (Mg 2+ ) alloys attract the focus of industries such as the telecom and computer industries and medical and household appliances due to their strength and weightlessness. However, magnesium is one of the major cell components of bacteria, which implicates it in microbial attachment and growth. To understand…
Segmented polyurethanes (PSEU) were synthesized from polydimethylsiloxane diol (PSi) mixed with poly(ethylene glycol) (PEG) in different ratios as soft segment, 4,4′-diphenylmethane diisocyanate as hard segment, and ethylene glycol as chain extender. FT-IR, NMR, and thermal analysis were used to characterize the struc…
Magnesium fluoride thin films were deposited on silica glass and single crystal silicon substrates by argon ion-beam assisted deposition (IBAD). The effects of argon ions impinging on the growing film on the optical and chemical properties of the single layers were investigated. Compared to MgF2 films produced by dire…
The nanocomposite material prepared via the intercalation of polyaniline in matrix has been used as the support for Pt in methanol oxidation reaction. The average particle size of the Pt as evaluated from the high-resolution transmission electron microscope was found to be 4 nm. The X-ray photoelectron spectroscopy an…
The chemical states of tin and iron atoms were investigated by Mössbauer spectroscopy on oxide films (of various thicknesses) formed on a Zr-1.3% Sn-1% Fe-0.5% Cr-0.12% O alloy (enriched with 119Sn and 57Fe) in an autoclave at 633 K with 10 ppm Li and 650 ppm B. Specimens were analyzed by Conversion Electron Mössbauer…
The high-operating-temperature fuel duty, 18-month and longer-cycle lengths, and higher burnups have put increased demands on PWR fuel during recent years. As a result of these demanding operating conditions, the corrosion and dimensional stability of PWR fuel assembly skeletons are being challenged. To understand the…
An investigation into the shock sensitivity of hexanitrostilbene (HNS) has been carried out. A Q‐switched Nd:YAG laser was used to launch miniature flyer plates from substrate‐backed aluminium films. The impact produces a shock with duration of the order of 1 ns and pressure of the order of 10 GPa. The explosive sampl…
Dendrimers are globular, hyperbranched polymers possessing a high concentration of surface functional groups and internal cavities. These unique features make them very useful in many biomedical applications, especially as carrier molecules. In this study, the interaction of tryptophan and 1-anilinonaphthalene-8-sulfo…
A near-room temperature active magnetic regenerative refrigerator (AMRR) was designed and built using a high-temperature superconducting (HTS) magnet in a charge-discharge cycle and a gadolinium-packed regenerative bed as the magnetocaloric component. Current to the HTS magnet was ramped periodically from zero to 100…
Sediments contaminated with organics compounds due to past disposal practices threaten the environment and require remediation. This study was an attempt to develop a technology to decontaminate organics in dredged sediments using ultrasound coupled with vacuum pressure. A set of laboratory scale experiments were carr…
Pale blue, lath-shaped single crystals of K2NdP2S7 (≡ K4Nd2[PS4]2[P2S6]; monoclinic, P21/n, a = 904.76(8), b = 677.38(6), c = 1988.7(2) pm, β = 97.295(5)°, Z = 2) are obtained by the reaction of Nd, S and P2S5 with an excess of KCl as a flux in evacuated silica tubes at 750 °C (7 d) which should produce Nd[PS4] instea…
We propose a model, translated into an algorithm, to simulate nonisothermal sintering of polydispersed glass undergoing concurrent crystallisation. The model is based on the two classical sintering stages proposed by Frenkel and Mackenzie–Shuttleworth. The input parameters are green density, particle size distribution…
Among porous ceramic with unidirectionally aligned pores, synthesized from a water-based slurry using unidirectional freezing and freeze-drying process, porous silicon nitride showed a characteristic microstructure wherein the macroscopically aligned open pores contained many fibrous grains protruding from their inter…