[The circadian dynamics of composition of human saliva according data of infrared-Fourier-spectroscopy.]

: The article demonstrates that infrared spectroscopy technique can be applied for detecting circadian changes of content of biological fluids, including saliva. The intensity of absorption bands in area of 1075 cm-1 can be used for evaluating both mineralization potential and defense characteristics of saliva glycoproteins. The absorption band of phospholipids correlates with content of calcium. The absorption bands 2963 and 3287 cm-1 characterize dynamics of coefficient Na/K that in turn provides information about activity of simpatico-adrenal system and thyroidal status. The existence of inner patterns in infrared spectrum permits to suppose that in normal state there is a balance between particular functional groups and any deviation can characterize various pathological states in human organism.