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  Indian J Med Microbiol
 

Figure 4: Illustration of the comparison of the infrared spectra (in absorbance) of the three analyzed particles of the trace (above and in red) and the three analyzed specimens from the dark material covering the fake gun (below and in blue) - from 4000 to 650 cm-1 with a zoom on the 1800–650 cm-1 area

Figure 4: Illustration of the comparison of the infrared spectra (in absorbance) of the three analyzed particles of the trace (above and in red) and the three analyzed specimens from the dark material covering the fake gun (below and in blue) - from 4000 to 650 cm<sup>-1</sup> with a zoom on the 1800–650 cm<sup>-1</sup> area