A Method for Thermal Generation of Aryloxyl Radicals at Ambient Temperatures: Application to Low-Density Lipoprotein (LDL) Oxidation This work was partly supported by the National Foundation for Cancer Research. We wish to thank M. C. Depew and J. K. S. Wan (Queen's University, Kingston, Canada) for their help in recording ESR spectra and D. Leek for the NMR measurements.