No abstract

Thin layers of tin disulphide are chemically deposited on glass plates. Optical transmission and reflectivity data are used to calculate the optical parameters. A direct allowed transition at 2.53 eV is recognised. An indirect allowed transition at 2.16 eV and assisting phonon of 0.06 eV is also observed.

New polymers of silicone derivatives were prepared. The polymers were characterized by IR, NMR spectrophotometry. The biological activity against Streptococcus, E-Coli, Pseudomonas, Staphylococcus, Klebsiella were studied. The new polymers have shown more activity against Pseudomonas, Staphylococcus aureus, Klebsiella. The wound dressing studied on New Zealand White Rabbits (5 groups) each group contained 6 rabbits (3 male and 3 female), each animal had made 2 wounds ,one for control(povidone-iodine, silicone gel) and other for our compounds, all products showed good activity on open wounds more than drugs in market. Benzaldehyde is consists of benzene bearing a single formyl substituent; the simplest aromatic aldehyde and parent of the class of benzaldehydes. It has a role as a flavoring agent, a fragrance, an odorant receptor agonist. Polyvinylpyrrolidone has disinfectant properties, so we used it in our compound to become more potent.