Abstract
Summary
1. Frozen and dried sections of brain tissue, brain extracts, and pure compounds related to lipid metabolism are studied by infrared spectroscopy. 2. The characteristic infrared absorption bands are tentatively assigned to certain lipid structures. An amide-free lipid fraction is studied In adult and developing brain. 4. Adult and developing brain tissues show different infrared spectra. These differences are in part caused by different content of amide-free lipids, 5. X-ray irradiation decreases the amide-free lipid fraction in the adult and increases that fraction in developing brain.
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