Figure 1From: A comparative study of gallstones from children and adults using FTIR spectroscopy and fluorescence microscopyFTIR spectra of a) Type I black stone b) Type II black stone c) brown stone from adult patients. Vector normalization was applied to the spectra in Figures 1,2,3,4,5,6,7. The spectra presented in figure 1 are the averages of 12 and 10 black and brown stones respectively.Back to article page