유근피 추출물을 첨가한 식혜의 저장성 및 관능특성

Abstract

In this study, 0, 20, 40, 60, 80, and 100% L. nonglutinous and glutinous sikhe were added to L. extracts for 15 days at , and for seven days at , to examine the extracts` storage properties and sensory characteristics. The results are as follows: (1) On the changes of pH and acidity during storage of L. nonglutinous and glutinous sikhe, both of them showed lower pH values with lower additive L. extract contents. The pH value continuously decreased with a longer storage period, and the acidity was higher with a lower concentration of L. extract. (2) The total microbial cell count during storage of L. nonglutinous and glutinous sikhe at was 4.6-5.0 log CFU/g at 0 day. The sikhe to which L. extract was not added increased to 8.8-9.0 log CFU/g on the seventh storage day, while the sikhye to which 80 and 100% L. extracts were added were 7.8 and 6.9 logCFU/g, respectively. Thus, the total cell count was lower with a higher additive content of L. extract. The total cell count of the sikhe to which 0-60% L. extracts reached the maximum value on the seventh storage day and did not show any change thereafter. The total cell count of the sikhe to which 80 and 100% L. extracts were added, however, reached the maximum value on the 10th to 13th storage days, thus showing that the storage period was increased by L. At , the total cell count was 4.6-5.0 log CFU/g on 0 day and continuously increased during the storage period. It had increased to 8.9-9.5 log CFU/g on the seventh storage day, and no differences were shown according to the additive content of L. extract. (3) On the sensory characteristics of L. nonglutinous and glutinous sikhe, the L. nonglutinous sikhe to which 20% L. extract was added showed the highest overall-acceptability value (), whereas the L. glutinous sikhe to which 40% L. extract was added showed the highest overall-acceptability value (). The sikhe to which 20 and 40% L. extracts were added showed significantly high taste, flavor, sweetness, and overall-preference values (p