title: Spin label motion in fatty acids.
abstract: Spin labels dissolved in highly purified fatty acid systems exhibit nearly identical tumbling rates in liquid and solid phases. Even though the spin labels do not have the same molecular geometry as the lipid matrix the melting point of the matrix can be inferred by measurements of the temperature dependency of molecular motion.
mesh_terms: D002855:Chromatography, Thin Layer; D003497:Cyclic N-Oxides; D004578:Electron Spin Resonance Spectroscopy; D005227:Fatty Acids / Q000032:analysis*; D005609:Free Radicals; D008041:Linoleic Acids; D008433:Mathematics; D009829:Oleic Acids; D010169:Palmitic Acids; D010713:Phosphatidylcholines / Q000032:analysis; D010714:Phosphatidylethanolamines / Q000032:analysis; D010880:Piperidines; D013113:Spin Labels; D013229:Stearic Acids; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014280:Triglycerides; D014783:Viscosity
chemical_list: D003497:Cyclic N-Oxides; D005227:Fatty Acids; D005609:Free Radicals; D008041:Linoleic Acids; D009829:Oleic Acids; D010169:Palmitic Acids; D010713:Phosphatidylcholines; D010714:Phosphatidylethanolamines; D010880:Piperidines; D013113:Spin Labels; D013229:Stearic Acids; D014280:Triglycerides