| 
      
        | Dilution    of  silver nanoparticles for same no.    of bacteria  in mg/ml | 10mg/ml | 5mg/ml | 2.5mg/ml | 1.25mg/ml | 0.625mg/ml | 0.312mg/ml |  
        | Set 1 | − | − | + | + | + | + |  
        | Set 2 | − | − | + | + | + | + |  
        | Set 3 | − | − | + | + | + | + |  
        | Set 4 | − | − | + | + | + | + |  
        | Set 5 | − | − | + | − | + | + |  
        | Set 6 | − | − | + | + | + | + |  | 
  
    | Positive (+) = Turbidity indicating growth Negative (-) = No turbidity indicating absence of growth
 | 
  
    | Table 1: Bacterial growth in different concentrations of silver nanoparticles after
    24 hours |