Materials Literature
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The Self Excited Induction Generator (SEIG) is an isolated power source whose terminal voltage and frequency are controlled by the excitation of the capacitance or the load impedance. This paper presents a method for calculating the minimum excitation capacitance using the equivalent circuit approach for analyzing the…
This preliminary research project has been conducted to evaluate different elastic polymer materials in terms of their applicability in peripheral nerve regeneration. Poly(tetrafluoroetylene-co-difluorovinylidene-co-propylene), poly(L-lactide-co-D,L-lactide), and polyurethane were used for the manufacture of tubular i…
A detailed computational study on the reaction mechanisms of the thermal activation of methane by the bare complex [Ni(H)(OH)](+) has been conducted. The experimentally observed reaction features, i.e. the ligand exchange Ni(H) → Ni(CH(3)), the H/D scrambling between the incoming methane and the hydrido ligand of the…
Abstract In this paper we study a generalization of the Hubbard model by considering spin-spin interactions described by the exchange constant J. An external magnetic field his also taken into account. In the narrowband limit and for the 1D case, we present the exact solution obtained in the framework of the Green’s f…
International audience
Surface imperfection specifications (i.e. Scratch-Dig) are the most misunderstood, misinterpreted, and ambiguous of all optics component specifications. Nevertheless, there are tools available that allow an objective measurement of surface quality, either to a dimensional type of specification, such as ISO 10110-7, or…
By mimicking the fine structures of butterflies wings and peacocks feathers, we have successfully brought structural color to silk fabrics. The three-dimensional (3D) face centre cubic (FCC) opal or inverse opal structure was constructed on the surface of the silk fabrics by materials assembly. The diversified colors…
The valence electronic states of thiophene (TP), 2-thiophenethiol (TT), 2,2'-bithiophene (BTP), and 2,2'-bithiophene-5-thiol (BTT) on Pt(111) were measured by ultraviolet photoemission spectroscopy (UPS) and metastable atom electron spectroscopy (MAES) to elucidate how the local electronic properties at the organic-me…
Biopolymers are developed as functional intermediate linkers for the assembly of nano and submicron-sized crystals. Mediated by the interlayers, iron oxide and zeolite crystals with varied shapes (cubic, ellipsoidal, and discoidal) are organized into uniformly oriented monolayers on glass plates and macroporous alumin…
The three-photon absorption (3PA) in nanostructure wide-band gap ZnO semiconductor material is observed under high intensity femtosecond Titanium-Sapphire laser of 800 nm wavelength excitation. The ZnO film was prepared by chemical spray pyrolysis technique with substrate temperature of 400℃. The optical properties co…
The temperature dependence of the integrated photoluminescence intensity of nanometer-sized ZnTe/CdTe/ZnTe quantum wells has been investigated under different excitation conditions. It has been shown that the character of thermal decay of the luminescence intensity depends on the frequency of the exciting light and, u…
Chitin nanofibers (CNF) are synthesized from shrimp cell chitin by stepwise purification and acid hydrolysis method. PMMA based polymer electrolytes complexed with LIN (CF 3 SO 2 ) 2 and chitin nanofibers as nanofiller have prepared by membrane hot-press technique. The prepared composite electrolytes are subjected to…
The voltammetric and polarographic behavior of 2-(5-bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulfopropyl)amino]phenol disodium salt dihydrate (5-Br-PAPS) at a hanging mercury drop electrode (HMDE) and static mercury drop electrode (SMDE) has been studied by several techniques including square-wave voltammetry (SWV), diffe…
Ordinary fatty acids such as oleic, elaidic and stearic acids exist as their hydrogen-bonded dimers in their liquids and in non-polar solvents. Infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy have revealed that semi-fluorinated (SF) acids containing a perfluorooctyl group (C₈F₁₇) as a terminal segment…
Discs of network polyvinyl alcohol-glutaraldehyde (PVAG) were synthesized and coated with polyaniline (PANI) using glutaraldehyde as a chemical arm (PVAG-PANIG-HRP disc). The best conditions for the immobilization were established as about 1.0 mg mL(-1) of protein, for 60 min and pH 5.5. The soluble enzyme lost all of…
The influence of CuFe2O4 nanoparticle doping on superconducting properties of Fe-sheated MgB2 wires has been studied. The wires containing 0, 3 and 7.5 wt.% of monodisperse superparamagnetic nanoparticles (∼7 nm) were sintered at 650°C or 750°C for 1 hour in the pure argon atmosphere. X-ray diffraction patterns of dope…
The Fe-N co-doped TiO2nanocomposites were synthesized by a sol-gel method and characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), ultraviolet-visible absorption spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS). Then the photocatalytic in…
The fibrinogen γ-module has several important sites relating to fibrinogen function, which include the high affinity calcium binding site, hole 'a' that binds with knob 'A', and the D:D interface. Residue γAla341, which is located in the vicinity of these sites, is altered in three variant fibrinogens: fibrinogen Seou…
In this work, we synthesized PNIPAAm and poly[2-(2-methoxyethoxy)ethyl methacrylate] (PEG analogue) with a similar degree of polymerization by ATRP. Their thermoresponsive behaviors in aqueous solution were inspected with phase diagrams, rheological properties and static/time resolved fluorescence analyses. We found t…
Two novel Ag(I) coordination polymers (CPs), namely, [Ag3(tpom)2(NO3)3(H2O)4]n (1) and [Ag2(tpom2)(NO3)2(H2O)4]n (2), (tpom = tetrakis(4-pyridyloxymethylene)methane, tpom2 = tetrakis(3-pyridyloxymethylene)methane) have been synthesized through the reaction of silver(I) nitrate and highly-connected tetra-pyridinate lig…