Synthesis and antimicrobial activity of some 3- (1-Phenylethyl) – 5- substituted – 2H- Tetrahydro- 1, 3, 5- Thiadiazine- 2- Thione derivatives Research Authors Radwan A. A. and Nemmat A. Hussein Research Journal Bull. Pharm. Sci. Research Pages 255-260 Research Rank 1 Research Vol 28(2) Research Year 2005