Dynamic FT-LR spectra in the amide I region were measured for silk fib
roin east films, Phase analyses of the dynamic spectra were carried ou
t in order to separate them into several components which are due to t
he secondary structures of fibroin. These observations showed that pea
k positions of the amide I bands were in good agreement with those obt
ained by Fourier self-deconvolution procedures, In conclusion, phase a
nalysis of dynamic FT-IR spectra is a powerful technique for separatio
n of highly overlapping bands.