Materials Literature
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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…
Germband retraction in Drosophila melanogaster, like most embryonic morphogenetic events in this organism and in higher eukaryotes, is not well understood. We have taken several approaches to study the relationships between previously identified mutations (u-shaped, serpent, hindsight and tailup) that selectively caus…
Silicon nitride with anisotropic microstructure was fabricated by tape-casting of raw powder slurries with 0-10vol% seed particles of morphologically regulated β-Si3N4 single crystal, followed by gas pressure sintering of stacked sheets. The effect of orientation degree and area fraction of large elongated grains on m…
Two hydrocyclic compounds namely Qj-1 and Qj-2 have been synthesized in the laboratory from indigeneous chemicals and their corrosion inhibiting action has been evaluated by weightloss method electrochemical technique in 15% hydrochloric acid under boiling condition. The performance of synthesized compounds were compa…
A Fourier-integral-based model for the computation of magnetic field distributions due to an arbitrary excitation loop above a conducting half-space is formulated. Evaluation of the Fourier transform of the excitation current components, as usually required in the conventional approaches, is not needed in this model.…
This paper presents a thorough study on the prediction of the elastic-material constants ratios of blended short-fiber yarns, based on the theory developed by the author for yarns of a single fiber type by considering the structures as transversely isotropic and combined with the techniques used in dealing with hybrid…
Abstract. The progress of thermoelastic martensitic transformation/MT / in Cu-Al-Zn-Mn shape memory alloy/SMA / polycrystals subjected to nonproportional thermornechanical loadings was investigated by combined tension and torsion of tubular specimens (T>> Af). The strain response of SMA polycrystal to va…
This article reports on a study of cratering effects in thin anti-icing films designed to protect aircraft surfaces from snow and ice accumulation while the aircraft is on the ground awaiting takeoff. These fluids primarily consist of a glycol used as a freezing point depressant, water, and to a small extent thickenin…
The initiation of the cationic ring-opening polymerization of lactones and tetrahydrofuran by electron-deficient organosilicon species has been investigated. The formation of the long-lived silylcarboxonium ion 1a from γ-butyrolactone and the silyloxonium ion 2a from THF has been evidenced by 1 H, 13 C, and 29 Si NMR.…
Heteropolyacid H4PMo11VO40 has been deposited in different amounts on the surface of SiO2(Aerosil) and SiC supports. The samples were characterized by surface potential, ion scattering spectroscopy (ISS) and X-ray photoelectron spectroscopy (XPS) techniques. The thermal stability of the acid increases at a low acid co…
This volume contains the proceedings of the IXth annual meeting of the European Colloid and Interface Society (ECIS) which took place in Barcelona, Spain, in September 1995. The contributions cover a