Figure 1From: Detection and differentiation of bacterial spores in a mineral matrix by Fourier transform infrared spectroscopy (FTIR) and chemometrical data treatmentFTIR spectra of vegetative cells of Bacillus circulans (solid line) and its spores (dashed line), measured in ATR mode (ZnSe prism). a) normalized spectra; b) second derivative of spectral range 1000 to 1500 cm-1.Back to article page