Abstract

To determine the proper picking period for Corni Fructus, the seed removal degree, free sugar contents, antioxidant capacities, and Hunter's color values were investigated at intervals of 15 days from 236 days after full bloom (DAFB) to 327 DAFB. The seed removal degree maximized at 280 DAFB (p<0.05), at this point the moisture contents were 197.40% (db) and 66.00% (wb). The seed removal degrees were also investigated during hot air drying, and the best seed removal degree was obtained at moisture contents of 191.90% (db) and 65.74% (wb), similar to those observed at 280 DAFB. Fructose and glucose were detected, and their contents decreased slowly after 280 DAFB. Total phenolic contents (TPC), and DPPH radical scavening activity both decreased over the picking periods, but total anthocyanin contents (TAC) decreased after 280 DAFB. The redness, and yellowness of Corni Fructus powders, determined by using Hunter's colorimeter, decreased after 280 DAFB, but lightness decreased over the picking periods. Studies of the physicochemical quality characteristics revealed that the proper picking period of Corni Fructus should be 280 DAFB.

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