PPO and POD activities in white tea during withering

Withering time (h) 0 4 8 12 16 20 24 28 32 Dried

Temperature (°C) 27.9 28.8 32.8 31.7 29.2 27.0 27.5 29. 1 31.1 110.0

Moisture (%) 76.2 74.1 68.2 63.4 57.9 52. 8 49.3 42.5 31.7 2.2

PPO 100.0 334.4 190.0 251.0 373.0 283.3 140.5 184.3 155.0 0

POD 100.0 146.6 208.9 438. 1 240. 1 93. 8 193.5 187.4 143.8 0 Source: Cheng, Z. 1984. Brief introduction of the catalyzation of enzymes during white tea manufacturing . Brief Rep. Tea Sci. 3:9-10 . With permission .

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