  Here we present an original study of the effect of hydration on Terahertz
absorption signatures in biomolecular (lactose monohydrate and biotin) and
bioparticles( Bacillus thuringiensis and Bacillus cereus spores). We observe
"read-shift" in center frequency with increasing hydration in all samples,
consistent with Lorentzian-oscillator behavior. But the effect of hydration on
linewidth is ambiguous, sometimes increasing the linewdith (consistent with
Lorentzian behaviour) and sometimes decreasing the linewidth.
