Persistent spectral hole burning is studied for several free-based and metallo-naphthalocyanine derivatives in polymer hosts. These materials exhibit a strong 0}0 absorption band in the region 800 nm matching the wavelength range of most semiconductor diode lasers and Ti : Sapphire lasers. Metallo-naphthalocyanines demonstrate a nonphotochemical hole-burning mechanism that is likely related to ...

BACKGROUND The charcoal burning suicide epidemics in both Hong Kong and Taiwan have been well documented. However, little is known about the situation in Japan. AIMS To examine the impact of charcoal burning suicide on the overall and other method-specific suicide rates between 1998 and 2007 in Japan. METHOD Using data obtained from the Vital Statistics of Japan, negative binomial regressio...

an internal ballistics model has been developed for performance prediction of a solid propellant rocket motor. inthis model a 1-d unsteady euler equation with source terms is considered. the flow is assumed as a non-reacting mixture of perfect gases with space and time varying thermo physical properties. the governing equations in the combustion chamber are solved numerically by using the stege...

introduction: infection is the most common complication of burn and one of the most important causes of mortality and morbidity in burned patients. topical antibiotics have important role in prevention and treatment of infection and reduction of mortality in burned patients. increases of use of antibiotics cause microbial resistance. methods: to determine microbial resistance to three topical a...