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  Indian J Med Microbiol
 

Figure 2: Samples preparations: (a) Addition of HNO3 and H2O2, (b) application of heat, (c) samples filtration, and (d) samples are wetted

Figure 2: Samples preparations: (a) Addition of HNO3 and H2O2, (b) application of heat, (c) samples filtration, and (d) samples are wetted