There is evidence that chronic exposure to high levels of ambient particulate pollutants (PM) is associated with chronic airflow obstruction, but how this occurs is not known. We exposed rat tracheal explants to Ottawa urban air particles (ECH93) or diesel exhaust particles. After 7 d in air organ culture, both types of PM increased explant procollagen and transforming growth factor (TGF)-beta ...

Ti-6Al-4V titanium alloy has great application in medicine and military industries due to its capabilities, namely high strength to weight ratio and corrosion resistance. In the current research, the effect of aging treatment on microstructure and wear behavior of Ti-6Al-4V titanium alloy was investigated. Pin on disk wear test was applied to assess the wear behavior. Specimens were first solut...

As a model for molecular traffic control we investigate the diffusion of hard core particles in crossed single-file systems. We consider a square lattice of single-files being connected to external reservoirs. The (vertical) alpha channels, carrying only A particles, are connected to reservoirs with constant density rho(A). B particles move along the (horizontal) beta channels, which are connec...

Radon, Rn, is radioactive noble gas which decays by alpha emission with half-life of 3.825 d. Its short-lived progeny, Po, Pb and Bi (Po), are alpha and beta radioactive and they emit gamma radiation as well. Radon progeny can be inhaled by humans where they deposit on the inner layers of bronchi, and bronchioles. Particles (alpha, beta and gamma) emitted in radioactive decay damage surrounding...

Controlled synthesis of well-defined planar Au nanodendrites with a symmetric single-crystalline structure consisting of trunks and side branches grown along the 211 directions was realized by reducing chloroauric acid in aqueous mixed solutions of dodecyltrimethylammonium bromide (DTAB) and beta-cyclodextrin (beta-CD). It has been revealed that the formation of the supramolecular complexes of ...

Silver nanoparticles (AgNPs) were synthesised by reducing silver salts using NaBH(4) followed by capping with varying concentrations of beta-cyclodextrin (beta-CD) and were physically characterised. Antibacterial activity against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus was determined by a microtitre well method. The AgNPs were spherical under transmission electron mic...