State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,Guangxi University,Nanning,China;
Zurich University of Applied Sciences,Institute of Chemistry and Biological Chemistry,Wädenswil,Switzerland;
Institute of Pharmacology and Toxicology,Dept.Biomedical Sciences,University of Veterinary Medicine,Vienna,Austria;
Department of Physics,Guangxi University,Nanning,China;
Coffee; Tea; Free Radicals; Antioxidants; EPR Spectroscopy; Quality;