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Semiconductor quantum dots have been used for the first time to label trichosanthin. The absorption and fluorescent spectra of quantum dot-labeled trichosanthin were different from those of trichosanthin, but no changes were found in the enzymatic activity of quantum dot-labeled trichosanthin in comparison with tricho…
Four porphyrins and one chlorin having aromatic groups at the meso position have been synthesized and tested as potential sensitizers for the photooxidation of phenols. The yields of conversion of 1,5-dihydroxynaphthalene and 2,3,5-trimethylphenol to their corresponding quinones have been determined following photolys…
Experience with the application of the sum current method to on-line diagnostics of high-voltage bushings and current transformers is presented. The method and analysis are described along with field experience obtained at fourteen substations, comprising 56 sets of (three) bushings and current transformers. The influ…
All six isomers of pyridinedicarboxylate (2,3-PDA; 2,4-PDA; 2,5-PDA; 2,6-PDA; 3,4-PDA; 3,5-PDA) can be intercalated by the layered double hydroxide [LiAl2(OH)6]Cl·H2O in water at 100 °C to give the fully ion-exchanged first stage intercalation compounds [LiAl2(OH)6]G0.5·xH2O (G = 2,3-PDA; 2,4-PDA; 2,5-PDA; 2,6-PDA; 3,…
Related DatabasesWeb of Science You must be logged in with an active subscription to view this.Article DataHistoryPublished online: 27 July 2006Keywordsconvolution, interface, Huygens' principle, motion by mean curvature, threshold growthAMS Subject Headings65C20, 82C24Publication DataISSN (print): 0036-1399ISSN (onli…
The effects of several low molecular weight compounds with hydroxyl groups on the physical properties of poly(ε-caprolactone) (PCL) were investigated by Fourier transform infrared (FTIR) spectroscopy and high-resolution solid-state 13C NMR. PCL and 4,4′-thiodiphenol (TDP) interact through strong intermolecular hydroge…
The effects of molecular weight of LNR, as a compatibilizer in NR/LLDPE blends, were studied. Rheological studies and mechanical properties of the blends showed that the molecular weight of LNR played a very important role in determining their performance. The blends that contained 15–25% LNR with an Mw of 4.8 × 105 a…
In the present study a fluorescence technique and nine fluorescence probes have been applied to monitor the curing of polyurethanes. As the curing proceeds, the fluorescence emission bands of the probes exhibit hypsochromic shifts due to the increase in the environmental microviscosity. An intensity ratio method was d…
Creep, the deformation over time of a material under stress, is one characteristic of wood-filled polymer composites that has resulted in poor performance in certain applications. This project was undertaken to investigate the advantages of blending a plastic of lower-creep polystyrene (PS) with high-density polyethyl…
Linear and star-shaped copolymers of trimethylene carbonate/ε-caprolactone were synthesized using different polyol initiators and catalysts. Unexpectedly, when dipentaerythritol was used as an initiator cross-linked rubbers were obtained, that swell in chloroform. This network formation can be understood by ‘in situ’…
This paper describes the influence of water trees on dielectric properties of flat samples cut from a HV crosslinked polyethylene (XLPE) cable insulation. In order to obtain experimental results in a short period of time, we used accelerated aging conditions of voltage and frequency as well as different techniques for…
A selective and sensitive luminescence method for the determination of levofloxacin is described. The method is based in the luminescence signal from a terbium(III)-levofloxacin complex, in a micellar solution of sodium dodecyl sulfate (SDS), using a chemical deoxygenation agent (Na2SO3). The method allows the determi…
With the electrochemical quartz crystal microbalance, it is possible to obtain time‐resolved in situ estimates of thickness changes of passive films. Thickness changes recorded for physical vapor deposited pure Cr during potential scans in the passive region in acidic media were compared to two different theories for…
The metastable state which is produced by irradiation with the green-blue region of light was studied by IR and other spectroscopic techniques for solid states of newly synthesized nitrosyl–ruthenium complexes; cis-[Ru(Hox)(en)2NO]Cl2·EtOH, trans-[Ru(Hox)(en)2NO]Cl2, cis-K[Ru(ox)2(en)NO]·3H2O, cis-[Ru(Hox)(ox)(en)NO],…
In this article, we present a study of the influence of temperature and humidity on the electric conductivity of polyaniline and polypyrrole thin films doped with iodine and synthesized by plasma (PAn/I and PPy/I, respectively). The polymers presented the characteristic ohmic conduction mechanism via electrons; howeve…
Magnesium and copper phyllosilicates, SILMSH (M = Mg, Cu), were synthesized by a sol–gel process from the reaction of these metallic cations and mercaptotrialkoxysilane in aqueous basic solution at 298 K. The inorganic–organic hybrids formed were characterized by elemental analysis, giving 4.88 and 3.68 mmol g−1 of or…
Pulsed-laser deposition was used to make thin films of NdNiO3 on a variety of substrates. The films were found to be single phase perovskite in all cases. However, the transport behavior varied strongly as a function of the substrate used: the films were semiconducting on MgO, but showed a metal-semiconductor phase tr…
The phase-field model for dilute ternary alloys is proposed and the relationships between phase-field parameters and material properties are derived at a thin interface limit. One-dimensional and two-dimensional numerical simulations show that the model reproduces the equilibrium conditions including Gibbs–Thomson eff…
In this paper, we report the first direct observations of local ordering in undoped and La‐doped Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) on an atomic scale by high‐resolution (∼1.26 Å) Z ‐contrast imaging. The 1:1 ordering occurs by a variation in the occupancy of Mg and Nb cations between B I and B II sublattices. In ordered reg…
Montmorillonite-PCH (porous clay heterostructure) and saponite-PCH are inorganic silica-like materials with large surface areas (∽1000 m2 g−1) and pore volumes (0.7 cm3 g−1). They are obtained by introducing a surfactant template in-between the clay plates and subsequently polymerizing a silica source around them. The…