The Investigation of Property of Radiation and Absorbed of Infrared Lights of the Biological Tissues

摘要

The properties of absorption of infrared light for collagen, hemoglobin, bivine serum albumen (BSA) protein molecules with alpha- 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 mu m) have been collected and determined by using a Nicolet Nexus 670 FT-IR Spectrometer, a Perkin Elmer GX FT-IR spectrometer, an OMA (optical multichannel analysis) and an infrared probe systems, respectively. The experimental results obtained show that the protein molecules and water can all absorb the infrared lights in the ranges of 600-1900 cm(-1) and 2900-3900 cm(-l), but their properties of absorption are somewhat different due to distinctions of their structure and conformation and molecular weight. We know from the transmission spectra of person's finger hands and skin that the infrared lights with wavelengths of 2 mu m-7 mu m can not only transmit over the person's skin and finger hands, but also be absorbed by the above proteins and water in the living systems. Thus, we can conclude from this study that the human beings and animals can absorb the infrared lights with wavelengths of 2 mu m-7 mu m.