a) Light microscope image of a fingerprint
b) IR microscope image
c) IR spectra on and next to a "groove" of the fingerprint
Measurement of the proportions of different protein secondary structures in aqueous solution:
By analyzing the amide I absorption band shape, the proportions of a-helix and ß-sheet structures can be determined.
By using a special protein measuring cell, accurate measurements were possible despite strong IR absorption of the water in the relevant spectral range.
Comparison of different cleaning processes:
Workpieces made of aluminum were subjected to different cleaning processes and tested by means of IR spectroscopy in grazing incidence to determine whether the workpieces could be freed from machining oil (C-H valence vibrations in the range 3000-2800cm-1).
Evidence for the preservation of epoxide groups:
Glycidyl methacrylate (GMA) can be deposited as a plasma polymer while preserving the monomer structure.
The oxirane ring is clearly visible in the IR spectrum.
Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB