Materials Literature
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Geometries, dimerization energies, and harmonic vibrational frequencies have been calculated for InMH 6 and MBH 6 (M = B, Al, Ga, and In) using MP2 and DFT methods. Results for B 2 H 6 and GaBH 6 show good agreement with experimental data, with both methods giving comparable accuracy. Trends in the properties of InMH…
Cincuenta y seis taxa de diatomeas del Orden Pennales, colectadas en Bahía San Antonio y proximidades (Prov. de Río Negro, Argentina) fueron estudiadas con microscopio óptico y microscopio electrónico de barrido. Cincuenta y cuatro de ellos son nuevos para el área. Licmophora hastata varoclavata Mereschkowsky, L. hyal…
近年, ごみ量の急増の傾向や埋立処分地の逼迫しているわが国では, ごみの減量化は, 処理の目的の中で大きなウエイトを占めるようになってきている。本文においては, この都市ごみ減量化および貯蔵可能なエネルギー回収技術として注目されているRDF (Refuse Derived Fuel: ごみ固形燃料) に関して, 技術的な側面を中心に概観してみた。内容としては, 1.廃棄物処理の現況とRDFのニーズ2.RDFシステムの開発経緯 (海外およびわが国) 3.RDF技術・システムにおける課題と対応策4.RDFの技術評価等を述べ, まとめとして, ごみの固形燃料化技術については, 基本的には, 固形燃料化施設の稼働実績もあり, 条件付きなが…
The rates of replacements of MeOH by pyridine (py) and imidazole (imH) type ligands L (=4CN-py, 3CN-py, 3Cl-py, 4Cl-py, py, 4Et-py, 4Me-py, 4NH 2 -py, 4(Me) 2 N-py; 4,5(Cl) 2 -imH, 4,5(CN) 2 -imH, Bz-imH, imH, 1Et-im, 1Me-im, 2Me-imH, 2Et-imH) in [(Co III P(MeO)(MeOH)] (P = protoporphyrin IX dimethyl ester) were measu…
Polyfuran films doped with perchlorate anions (PFu/ClO 4 ) were studied by scanning and transmission electron microscopies and electron diffraction in order to analyze their morphology and microstructure. Film generation was carried out electrochemically at constant potential, E d = 2.6 V (Ag/Ag + ), onto platinum ele…
The heat storage rate of a single pellet of magnesium nickel hydride was experimentally and theoretically studied for recovering waste heat from a industrial plant. The Mg–Ni hydride fine powder as a raw material was coated by copper thin film to obtain enough strength against hydrogen absorption/desorption cycles. Th…
The evolution of a RuO2–TiO2 film electrode has been studied as a function of temperature by secondary ion mass spectrometry (SIMS). The coating mixture prepared on a titanium support from an isopropyl alcohol solution of hydrated ruthenium chloride and titanium diisopropoxide bispentane-2,4-dionate precursors was hea…
Conducting polymers are materials of recent origin. They are obtained by polymerisation of simple organic monomers and doping with electron acceptor or donor species and show conductivity ranging from that of a semiconductor to that of metal. These materials are now available with unique electronic and optical propert…
Tartaric acid, malic acid, and glyceric acid were copolycondensed with glycolic acid at various molar ratios in feed to quickly synthesize biodegradable oligoesters. They were likely to have a moderately cross-linked structure with relatively low molecular weights and hydrophilic groups on the chains. In addition to m…
50 phr each of three hydrocarbon resins of different aliphatic-aromatic nature was added to a solvent based polychloroprene adhesive. The hydrocarbon resins were characterized using infra-red (IR) spectroscopy and differential scanning calorimetry (DSC) measurements. The properties and compatibility of the polychlorop…
The photodecomposition of Fe(CO) 5 adsorbed on the Au(111) surface at ∼90 K has been studied using IR reflection absorption spectroscopy (IRAS), thermal desorption spectroscopy (TDS), and X-ray photoelectron spectroscopy (XPS). IRAS and TDS show that Fe(CO) 5 is molecularly adsorbed on the surface and desorbed complet…
An electron spectroscopy for Chemical Analysis (ESCA) characterization of films based on collagen-poly(vinylalcohol) blends, cross-linked by dehydrothermal treatment is reported. The semiquantitative analysis indicates a remarkable enrichment of collagen in the surface with respect to its initial percentage utilized t…
The sorption and reduction of NO 2 have been studied on ammonium 12-tungstophosphate, a microporous derivative of 12-tungstophosphoric acid. NO 2 penetrates into the bulk structure, where reduction by NH 4 + occurs. Nitrogen, oxygen, and nitrous oxide are produced. Nitrogen is desorbed into the gas phase while oxygen…
The object of this paper is to briefly describe various methods of measuring yarn spacing and focus attention on some results of the research designed to study the ‘Prevention of Start-up Marks in Fabrics Woven on Power Looms’.
Investigations of corrosion of different crucible materials (Al2O3, SiO2, Pt) due to attacks by metaphosphate melts Me(PO3)2 with Me=Mg, Ca, Zn and NaPO3 show a dependence on the chemical composition of crucible material and glass as well as the melting temperature and -time.
The synthesis of new hybrid polyphosphazene−siloxane polymers is described. These polymers contain a polyphosphazene backbone and [( N -methylamino)propyl]siloxane side groups, −N(Me)(CH 2 ) 3 SiMe 2 OSiMe 3 or −N(Me)(CH 2 ) 3 SiMe 2 OSiMe 2 OSiMe 3, in ratios of 1:1 and 1:3 with trifluoroethoxy, 2-(2-methoxyethoxy)et…
A three-step synthesis of perfluorinated bisnoradamantane, F -tricyclo[3.3.0.0 3,7 ]octane, the smallest unsubstituted perfluorinated cage compound yet reported in the literature, is described. Oleum oxidation of adamantane to adamantane-2,6-dione followed by aerosol fluorination to F -adamantane-2,6-dione which is th…
Nonequilibrium grain boundary segregation of alloying elements in an Fe–5Mn–9Ni–5Mo alloy and its effect on the mechanical properties have been investigated through AES and tensile test. The alloy showed a ductile-brittle-ductile transition during isothermal aging at 430 or 450°C, and intergranular fracture was shown…
"This book highlights the latest experimental and theoretical developments in the field of femtochemistry, with papers describing the physics and chemistry of ultrafast processes in small molecules, complex molecular systems, clusters, biological systems, solids, matrices, liquids and at surfaces and interfaces. The r…
Effects of Ni and Si on delayed fracture properties of high strength steels with 1420MPa grade were investigated. 0.25% to 3.5% of Ni or 0.25% to 1.7% of Si was added respectively to 0.3%C-boron-containing steel. Delayed fracture test and measurement of diffusible hydrogen were carried out using bar steels for prestre…