Ultra-violet Absorption Spectra of Certain Physiological Fluids

The study of the absorption curves in the ultra-violet region of the spectrum has been confined chiefly to the blood serum and its proteins. Lewis ~ has examined the ultra-violet absorption of blood serum and claims to have found in this way the existence of specific changes in the blood with certain diseases. This same author 2 has also published absorption curves of the three chief proteins of the serum, namely albumin, pseudoglobulin and euglobulin. Tadokoro 8 and Nakayama ~ have observed changes in the blood serum under various conditions of physiological interest. Stenstrom and Reinhard 5 have studied the ultra-violet absorption spectra of blood sera in relation to infectious diseases and to cancer. Dh6r6 e has investigated the ultraviolet absorption of certain proteins and amino acids and Ward ~ has published the absorption curves of some amino acids. I t is the purpose of this paper to present such ultra-vlolet absorption curves of physiological substances which would seem of value or interest to others.