Figure 2From: Detection and differentiation of bacterial spores in a mineral matrix by Fourier transform infrared spectroscopy (FTIR) and chemometrical data treatmentDifferentiation by principal component analysis of spores formed by seven Bacillus species measured in FTIR-ATR mode. a: B. atrophaeus; b: B. brevis; c: B. circulans; m: B. megaterium; l: B. lentus; s: B. subtilis; t: B. thuringiensis. Measurements were performed in triplicates.Back to article page