Abstract:

The aim was to improve the extracting efficiency of stone cell in pear. Pyrus bretschneideri Rehd var. chili and Pyrus pyrofolia Nakia var. Whangkeumbae were used in this research to study the effect factors on extraction of pear stone cells by setting different freezing time and freeze-thaw times on the base of freezing method. The results showed that the repeat freeze-thaw treatment of 3 h+3 h+3 h could obtain the best extraction results in all treatments. Stone content was increased along with the number of freeze-thaw times, which showed that freeze-thaw times had obvious effects on stone cells extraction results. Under the same freeze-thaw times, increasing freezing time had little effect on extraction results when it reached 3 h. So the extraction results by freezing method were in close correlation with freeze-thaw times. After reached essential freezing time, higher stone cells content could be produced owing to more freeze-thaw times.