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Far infrared spectra of Bacillus subtilis and Bacillus thuringiensis were recorded using Terahertz time-domain spectroscopy (THz-TDS). Multiple dilutions of each species were prepared to enable the analysis of spectral data up to 2,5 THz. The optical constants of pure spores were then extracted using the well know Maxwell-Garnett effective medium model. We show that the refractive index can be used...
Terahertz-time domain spectroscopy (THz-TDS) is a powerful tool to probe low energy vibrational modes of organic molecules. Three series of structurally related compounds were characterized between 0.1 and 2.5 THz. The results obtained shows that THz-TDS enables good discrimination of these compounds. Absorption features were assigned by computational chemistry and fitted to the Lorentz dipole oscillator...
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