Materials Literature
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BACKGROUND: Sonodynamic synergistic antitumor therapy is a promising new methodology for cancer treatment. MATERIALS AND METHODS: To determine the antitumor effects of ultrasound (US) in the presence of acridine orange (AO), 1.0 microg/ml solution of AO was tested as a sonodynamic compound against sarcoma 180 cells in…
BaCeO3 or SrCeO3-based perovskites doped with a rare earth are high temperature protonic conductors (HTPC) envisioned as electrolytes for fuel cells working at intermediate temperature (400–600 °C). In these ceramics, the proton conductance is hampered by microstructural defects that act as barriers for hydrogen diffu…
Multiple scattering theory is applied to low-energy electron collisions with a complex target formed of two molecular scatterers. The total T-matrix is expressed in terms of the T-matrix for each isolated molecule. We apply the approach to elastic electron-(H2O)2 collisions. Following the method developed in our previ…
The thermally induced solid state synthesis of soluble organophilic maghemite (γ-Fe(2)O(3)) nanocrystallites is described. The solvent-free one-step synthesis involves the reaction in the melt state of Fe(NO)(3)·9H(2)O and RCOOH (R = C(11)H(23), C(15)H(31)) at 240 °C. The method yields well-crystallized nanoparticles…
The first two-dimensional halogeno(cyano)cuprate, [(Me 4 N)(H 3 O)][(Cu 4 Cl 4 )][Cu(CN) 2 ] 2, with an unprecedented volcano-group-like structure possessing peculiar 4-fold Cu 4 Cl 4 crowns has been solvothermally synthesized, which exhibits efficient green luminescence. The emission mechanism was studied in detail t…
Paal–Knorr condensation of 2,5‐hexadione with primary amines in the presence of a catalytic amount of sulfamic acid under solvent‐free conditions has been accomplished with an excellent yield. This is a very easy, rapid, and high‐yielding reaction for the synthesis N‐substituted pyrrole derivatives.
Cluster model DFT calculations of CO adsorption on various possible forms of gallium in Ga/HZSM-5 zeolites have been performed. CO was found to only weakly interact with Ga +, (GaO) +, and (Ga(OH) 2- n H n ) + ( n = 1, 2) cationic clusters. The resulting shifts of the CO stretching frequency (Δν CO ) are only very sma…
In this paper we investigate the electrochemical impedance characteristics of the direct methanol fuel cell (DMFC) under various operating conditions such as cell temperature, methanol flow rate, cathode flow rate, methanol concentration, cathode backpressure, and type of oxidant gas. The impedance characteristics of…
Disulfide bonds play an important role in understanding protein folding, evolution, and in studies related to determining structural and functional properties of specific proteins. At the state-of-the-art, a large number of computational techniques have been proposed for determining disulfide bonds. Operating across t…
Experiments and computational simulations are carried out to study the behavior of a granular column in a silo whose walls are able to vibrate horizontally. The column is brought to a steady fluidized state and it behaves similar to a hydrostatic system. We study the dynamics of the granular discharge through openings…
We propose a highly ordered multi-scale nanostructure of TiO(2) for applications as an anode in dye-sensitized solar cells (DSSCs). The structure is composed of a TiO(2) blocking layer, a TiO(2) inverse opal main body, regularly arranged transport channels between contacting spherical voids of the TiO(2) inverse opal,…
Abstract Surface plasmon dispersion in nanoscale thin Ag films deposited onto the Ni(111) surface was investigated by angle‐resolved electron energy loss spectroscopy. We found that the dispersion curve contains only the quadratic term. The vanishing of the linear term was ascribed to the presence in the film of Ag 5s…
Abstract The synthesis of diblock copolymers with designed molecular weight distributions (MWDs) was successfully demonstrated in a continuous living cationic polymerization system using simple equipment. The control of MWDs was achieved by gradually feeding a polymerization reaction mixture into a terminating agent.…
Based on density functional formalism, we investigate the site preference for the adsorption of CO on Cu, Rh, Ag, Pt, and Au(111) surfaces. The exchange-correlation term was approximated by BLYP, a functional within the generalized gradient approximation (GGA) family that combines Becke's exchange functional with the…
Abstract Thermosensitive hydrogel made up of poly(N‐isopropylacrylamide) (PNIPA)‐chitosan semi‐interpenetrating network (semi‐IPN) with ultrarapid responding rate was synthesized. Horseradish peroxidase (HRP) was then immobilized on this hydrogel that acted as an enzyme‐carrier by glutaraldehyde bridge. Polymerization…
Abstract Four demulsifiers were prepared in three steps. In the first step, styrene and maleic anhydride were copolymerized. In the second step, a long‐chain alcohol (dodecanol) was reacted with the prepared copolymer to form the monoesterified copolymer. In the final step, the resulting product was further esterified…
Poly(N-isopropylacrylamide) and poly(vinyl methyl ether) are well-known thermoresponsive polymers. The aqueous solutions of these polymers exhibit a phase transition followed by phase separation with LCST approximately 305-310 K. In the present study, the dynamic behavior of the phase separation was analyzed by a lase…
Polycrystalline samples and single crystals of the complex boride Ti9Fe2Ru18B8 were synthesized by arc-melting the elements and characterized by single-crystal X-ray diffraction and energy-dispersive X-ray analysis. Ti9Fe2Ru18B8 is a new substitutional variant of the Zn11Rh18B8 structure type, space group P4/mbm (No.…
Paclitaxel (1a), a well known antitumor agent adopted mainly for the treatment of breast and ovarian cancer, suffers from significant disadvantages such as low solubility, certain toxicity and specific drug-resistance of some tumor cells. To overcome these problems extensive research has been carried out. Among the va…
The interaction between mucin and ions has been investigated by employing the quartz crystal microbalance technique with measurement of energy dissipation. The study was partially aimed at understanding the adsorption of mucin on surfaces with different chemistry, and for this purpose, surfaces exposing COOH, OH, and…