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The properties of absorption of infrared light for collagen, hemoglobin, bivine serum albumen (BSA) protein molecules with α- helix structure and water in the living systems as well as the infrared transmission spectra for person’s skins and finger hands of human body in the region of 400–4000 cm−1 (i.e., wavelengths of 2–20 μm) have been collected and determined by using a Nicolet Nexus 670 FT-IR...
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