1. State Key Laboratory of Tea Plant Biology and UtilizationAnhui Agricultural Univ. 230036 Hefei People's Republic of China
2. Dept. of Food ScienceRutgers Univ. New Brunswick 08901‐8554 NJ U.S.A.
3. Graduation Program in Food Science and TechnologyState Univ. of Ponta Grossa 84030‐900 Ponta Grossa Brazil
4. Graduation Program in ChemistryState Univ. of Ponta Grossa 84030‐900 Ponta Grossa Brazil
5. Innovative Food System UnitNatural Resources Inst. Finland (LUKE) FI‐02150 Espoo Finland