FOOD SCIENCE ›› 2006, Vol. 27 ›› Issue (11): 289-293.

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tudy on Vacuum Freeze-drying Technology of Green Asparagus

 WANG  Ming-Kong,   He-Jun-Ping,   Wang-Wei, SUN  Ping-Ping, WANG  Xiao-Li   

  1. College of Food Science and Technology,Agricultural University of Hebei,Baoding 071001,China
  • Online:2006-11-15 Published:2011-11-28

Abstract:  The paper investigated the technological conditions of prefreezing and vacuum freeze-drying for preserving the green asparagus. Through two factors contrast design,it was sured that the optimum conditions of prefreezing are being freezed 4h at -20℃. The L9(34) orthogonal design showed that the optimum conditions of freeze-drying are: pressure 55Pa,temperature of sublimation 55℃ and temperature of resolution 65℃.

Key words: green asparagus, vacuum freeze-drying, technology