SEARCH Articles Figures Tables Fourier transform infrared Normal transformation Normality transformations Subtracter Subtracting Subtractive Subtractive Fourier-transform Subtractively normalized interfacial Subtractively normalized interfacial Fourier Subtractively normalized interfacial Fourier transform infrared Subtractively normalized interfacial Fourier transform infrared spectroscopy Subtractively normalized interfacial Fourier-transform infrared reflection