Structures and orientation-dependent interaction forces of titania nanowires using molecular dynamics simulations

Engineering nano wires to develop new products and processes is highly topical due to their ability to provide highly enhanced physical, chemical, mechanical, thermal and electrical properties. In this work, using molecular dynamics simulations, we report fundamental information, about the structural and thermodynamic properties of individual anatase titania (TiO2) nanowires with cross-sectional diameters between 2 and 6 nm, and aspect ratio (Length: Diameter) of 6:1 at temperatures ranging from 300 to 3000 K. Estimates of the melting-transition temperature of the nanowires are between 2000 and 2500 K. The melting transition temperature predicted from the radial distribution functions (RDFs) shows strong agreement with those predicted from the total energy profiles. Overall, the transition temperature is in reasonable agreement with melting points predicted from experiments and simulations reported in the literature for spherical nanoparticles of similar sizes. Hence, the melting-transition temperature of TiO2 nanowires modelled here can be considered as shape independent. Furthermore, for the first time based on MD simulations, interaction forces between two nanowires are reported at ambient temperature (300 K) for different orientations: parallel, perpendicular, and end-to-end. It is observed that end-to-end orientations manifested the strongest attraction forces, while the parallel and perpendicular orientations, displayed weaker attractions. The results reported here could form a foundation in future multiscale modelling studies of the structured titania nanowire assemblies, depending on the inter-wire interaction forces

Incidence of Helminthic infection in Axis Deer

The parasitic investigation was carried out in 200 Axis deer of scrub forest of Borgaon Manju in Western Vidarbha region of Maharashtra and revealed the presence of Strogylides sp., Strogyle sp.,Trichostrogylus sp, Trichuris sp., Oesophagosomum sp. Total 89.05% animal were positive for parasites representing Strogyloides(31.50%),Strogyles sp(20.00%),Haemonchus sp.(13.80%), Trichostrongylus(11.50%), Trichuris (8.50%), and Bunostomum sp.(4.00%). The incidence was highest in winter season followed by rainy season. [Vet World 2008; 1(1.000): 10-10

Prevalence of Gastrointestinal Parasites in Cattle of Western Vidarbha Region

Total 350 fecal samples of cattle from representative area of Western vidarbha region around Akola was collected and examined for incidence of gastrointestinal helminth infestation. Out of total 232, positive sample 62.29% had single and 6.00% had mixed infection of Haemonchus and Trichris spp. Seasonal prevalence revealed higher in rainy season and lower in winter. Stogylus sp. was the predominant helminth infection in all the season. The nematodes infection were higher followed by cestodes and trmatodes. [Veterinary World 2008; 1(2.000): 45-45