Nanotechnology is the understanding and control of matter at dimension of roughly 1-100 nanometers, where unique phenomena enable novel applications. Recent innovation in nanotechnology has transformed a number of scientific and industrial areas including the microbiology and other biological field. In this experiment Ag-nanoparticles were prepared by using polysaccharide isolated from Spondias mombin and characterized by UV-VIS spectrum band at 420 nm. We found those nanoparticles were very effective against some human pathogenic bacteria like E.coli, K.pneumoniae, Pseudomonus. We found that Ag-nanoparticles of Spondias mombin are very good effective against E.coli, K.pneumoniae and Pseudomonus sp. compared with the antibiotic ciprofloxacin. It has strong photocatalytic activity against congo-red. Those particles showed nuclease activity on plasmid DNA.
