Weerakkody L. R. and Witharana C. (2019) Over expression of the Multicopy Associated Filamentation (maf ) gene of Caldimonas manganoxidans MS1 and determination of the biological effect on the viability of bacterial cells. Oral presentation at the 4 th International Research Symposium on Pure and applied sciences (IRSPAS – 2019) at the faculty of science, University of Kelaniya on 25th October 2019