This paper reports for the first time the luminescent property of polystyrene (PS), produced by pulsed ultra violet laser irradiation. We have discovered that, in air, ultra-violet (UV) irradiated PS nanospheres emit bright white light with the dominant peak at 510 nm, while in vacuum they emit in the near-blue region. From the comparison of PS nanospheres irradiated in vacuum and air, we sugge...

In this paper I have chosen some diseases and conditions which can be greatly benefited by the use of ultra-violet light. In writing these notes I have dealt with each subject from three points of view, viz : (1) the rationale of the use of the ultra-violet rays; (2) the available authoritative literature on the subject; and (3) the technique in detail. The following ten conditions will now be ...

effectiveness of the ultra-violet dose by the dose-independent factor q. This makes it possible to surmise that in our experiments the killing of the bacteria and the production of the mutants might be due to the same chemical effect produced by the ultra-violet irradiation. 1 Kelner, A., PROC. NATL. ACAD. ScI., 35, 73 (1949). 2 Dulbecco, R., Nature, 163, 949 (1949). 3 Witkin, E. M., Genetics, ...

Ultra violet spectrophotometric estimation of the raltegravir potassium, an integrase inhibitor antiretroviral agent was estimated by Ultra violet absorption maxima method at λmax of 328 nm and UV area under curve method in the wave length range of 323-333 nm. The Beer's law obeyed in the concentration range of 3-55 μg/ml and correlation coefficients were found to be more than 0.996 for both me...