Porous SnO(2) nanospheres with high surface areas have been synthesized through a solvothermal method in the absence of any templates. The structure and morphology of the resultant products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption technique....

The possibility of using Aspergillus terreus protease in detergent formulations was investigated. Sodium dodecyl sulfate (SDS) and native polyacrylamide gel electrophoresis indicated that the purified alkaline protease (148.9 U/mg) is a monomeric enzyme with a molecular mass of 16 ± 1 kDa. This was confirmed by liquid chromatography-mass spectrometry. The active enzyme degraded the co-polymeriz...

The synthesis, characterization and DNA binding properties of the complex [Ru(terpy)(4,4'-(COLysCONH(2))(2)bpy)Cl](3+) (1) have been studied. Complex (1) hydrolyzes to (2) with a calculated rate constant K(h) = 2.35 ± 0.08 × 10(-4) s(-1) and binds coordinatively to ct-DNA, with a saturation r-value at about 0.1. Stabilization of the ct-DNA helix at low electrolyte (NaClO(4)) concentration (10 m...

As a tool with which to detect iodinated compounds in human thyroid specimens, we have reevaluated a nonincineration technique which has so far been employed in the determination of thyroxine-iodine in peripheral blood. The catalytic action of iodoamino acids in the Ce-As reaction was enhanced by a small amount of Cl2. On the contrary, a large amount of Cl2 inhibited the reaction unexpectedly. ...

The hexanucleoside pentaphosphate d(m-'CpGpnrCpGpm-'CpG) has been studied in solution by ultra-violet absorption, circular dichroism and 31p nuclear magnetic resonance under various experimental conditions. In 0.2 M NaClO^ at low temperature, an hexamer duplex is formed which has a B or B-like conformation. As the salt concentration is increased, a transition from a B-form to the Z-fonn occurs ...

The aims of this research were to study the influence of peracetic acid (PAA) on the formation of mutagens in surface waters used for human consumption and to assess its potential application for the disinfection of drinking water. The results obtained using PAA were compared to those found with sodium hypochlorite (NaClO) and chlorine dioxide (ClO2). The Ames test, root anaphase aberration ass...

Neutrophils and macrophages engulf not only microorganisms but also damaged tissue and degrade these materials in the phagolysosome (1-5). In wound healing, early infiltration of neutrophils followed by macrophage infiltration are important defense mechanisms for repair of tissue damage. Infiltrating neutrophils clear the wounded area of foreign particles and bacteria and are then extruded with...

Dried leaves of Catharanthus roseus were extracted with aqueous acidic 0.1 M solution of HCl. Alkaloid-embonate complexes were obtained as precipitates by treating the extract with an alkaline (NaOH) solution of embonic acid (4,4-methylene-bis-3-hydroxynaphtalenecarboxylic acid). The precipitate mainly consisted of catharanthine and vindoline embonates and it was directly used as the starting m...

Iodide excess acutely downregulates NIS mRNA expression, as already demonstrated. PCCl3 cells treated or not with NaI, NaI+NaClO(4) or NaI+Methimazole, for 30 min to 24 h, were used to further explore how iodide reduces NIS gene expression. NIS mRNA expression was evaluated by Real-Time PCR; its poly(A) tail length, by RACE-PAT; its translation rate, by polysome profile; total NIS content, by W...

The AuNPs/PEDOT nanocomposite consisting of poly(3,4-ethylendioxythiophene) and Au nanoparticles (AuNPs) can be easily synthesized on electrode surface. It was studied to develop a new NaClO sensor with improved performance with respect to bare electrode and to pure metallic (AuNPs) modified electrodes. This nanocomposite can be performed by electrochemical co-deposition using ionic liquid 1-bu...