Materials Literature
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Space charge in crosslinked polyethylene (XLPE) has been detected under both ac and dc fields. Its role in electrical aging and breakdown is recognized, but not deeply understood. It is thought that identification of the trapping centers in this material would help improve the modeling of conduction and electrical agi…
Hydrogen peroxide is a ‘green’ oxidant whose relatively high cost has prevented it from being applied to commodity chemical processing. In large part, those attributes of the current process (the anthraquinone route) that contribute to the cost of H2O2 also contribute to its non-sustainable features; by-product stream…
Coating strategies for corrosion protection considering intrinsically electronic conducting polymers have become important mainly because of restrictions on the use of heavy metals due to their environmental problems. This work presents the electrochemical behavior of an acrylic blend formed by sulfonate-doped polyani…
The micellar-like particle systems produced from poly-D,L-lactide-poly(ethylene glycol) (PLA-PEG) copolymers have been assessed using a range of physicochemical characterisation methods, followed by in vivo studies of their biodistribution after intravenous administration to the rat. The size of the PEG chain was kept…
Treatment of dichloro- and dicarboxylato-tin(IV) porphyrins with K2CO3 in THF–H2O (4 ∶ 1) is a mild and highly efficient method for formation of dihydroxotin(IV) porphyrins; unlike other reported procedures, this method is especially good for lipophilic porphyrins and bis-porphyrins. The synthesis of the mixed metal d…
Two new copper(II) complexes, derived from an end-to-end azido linker and two different tridentate Schiff base ligands, have been synthesised and their crystal structures determined by X-ray diffraction methods. They are the single azido-bridged [Cu(L1 − H)(μ-1,3-N3)] n(H2O)2n (1) chain and the dinuclear [Cu2(L2)2(μ-1…
Under mild hydrothermal conditions the novel thioantimonate(III) [Ni(C4H13N3)2]2Sb 4S8 was synthesised using elemental nickel, antimony and sulfur; the structure is composed of cyclic isolated [Sb4S8]4− anions and [Ni(C4H13N3)2]2+ cations.
The mono-chain L-alanine derivatives self-assemble into bilayer aggregates in a number of organic liquids and gelatinize the liquids.
BACKGROUND: Compared with free drug, sterically stabilized liposomal drug has prolonged circulation time and, thereby, higher tumor selectivity and antitumor activity. The stability in plasma is an important consideration in the formulation of clinically useful liposomal drug. A Phase I study of a stable liposomal dox…
The piezoelectric and dielectric constants for Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT, 70/30) films with different orientations were measured. PMN–PT films were deposited on Pt(111)-passivated silicon substrates using a modified sol–gel process. The room temperature dielectric constants K for the {100}-oriented films were 25…
Chloromethylated poly(styrene) and chloropropylated silica gel have been reacted with α,ω-diamines to give diamine modified catalyst supports which have then been covalently attached to iron(III) tetrakis(pentafluorophenyl)porphyrin (FeTF5PP). In this way the diamino groups provide a simple linker/spacer unit between…
Thin ultradisperse diamond (UDD) layers deposited from a water suspension are studied by optical and x-ray photoelectron spectroscopy (XPS). The effective band gap determined by the 104-cm−1 criterion for ozone-cleaned UDD is 3.5 eV. The broad structureless photoluminescence band (380–520 nm) is associated with radiat…
The effects of hydrogen in type 310 stainless steel on the disorder of passive films and pitting susceptibility have been investigated. It is found that hydrogen decreases the breakdown potential, facilitates the pitting initiation and increases the pit density and growth rate. The passive films are found to exhibit n…
Deposition processes of chromium (Cr) species for the system chromia-forming alloy metallic interconnect/Sr-doped (LSM) electrode/3 mol % (TZ3Y) electrolyte have been investigated at 900°C with no air flow ( i.e. , the electrode was exposed to open air). With air flow, the deposition of Cr species took place preferent…
Solid oxide fuel cell (SOFC) reactions with a diluted dry methane feed were studied from chemical equilibrium analysis. The rate of carbon deposition and the composition of an anode gas mixture in equilibrium were predicted as a function of current density by minimizing the total Gibbs free energy of a system with 21…
The photodynamic activities of the free-base 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrin (TMP) and their metal complexes with zinc(II) (ZnTMP), copper(II) (CuTMP) and cadmium(II) (CdTMP) have been compared in two systems: reverse micelle of n-heptane/sodium bis(2-ethylhexyl)sulfosuccinate/water bearing photooxidizab…
The electrical conductivity and the mean transport number of pyrochlore-type 0.03, 0.05) and were systematically studied as a function of temperature under wet hydrogen and oxygen atmospheres Under wet hydrogen atmosphere, pure proton conduction was observed below 873 K for both and systems. The proton conductivities…
Microtubules of polypyrrole (PPy) were synthesized by an electrochemical template-free method in the presence of β-naphthalenesulfonic acid (β-NSA) as a dopant for the first time. The influence of electrochemical polymerization conditions, such as material of the working electrode, the concentration of β-NSA and pyrro…
ABSTRACT: With the use of Fourier Transform Infrared (FTIR) analysis applied to methylcellulose (MC) films, the hydrogen bonding formation between MC‐MC molecules and between MC and a series of different‐molecular‐weight PEGs was studied. The spectra of the films were interpreted in terms of the symmetry distortion of…
The major linear and nonlinear electric properties of urea and thiourea have been calculated at different levels of approximation with respect to the treatment of the electron correlation contribution. The basis set saturation effects were studied by comparing the results computed in three different basis sets of incr…