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題 名 | Prediction of Microbial Growth in Liquid Model Systems Exposed to Temperature Fluctuations=預測微生物在溫度波動環境下液態模擬系統中的生長狀況 |
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作 者 | 李根永; | 書刊名 | 東海學報 |
卷 期 | 33 1992.06[民81.06] |
頁 次 | 頁1101-1113 |
分類號 | 463.7 |
關鍵詞 | 生長; 系統; 波動; 液態; 微生物; 溫度; 模擬; 環境; |
語 文 | 英文(English) |
中文摘要 | 從B. thermosphacta 與P. fluorescens 的生長中,可觀察到遲滯生長期與比 生長速率具有線性關係存在。這種關係在生長環境水活性愈接近最小可生長水活性 時,相關性愈大。利用此一關係的迴歸方程式,可由此生長速率預測遲滯生長時間, 再配合累積生長適應函數,可建立預測模式估算B. thermosphacta在低水活性,溫 度波動環境中的生長情形。此一預測模式可用於半濕性食品及冷藏食品在溫度波動 環境下,有效貯存期限的預估。 |
英文摘要 | A linear relationship between lag phase and the inverse of the specific growth rate was observed for the growth of B. thermosphacta and P.fluorescens. This re- lationship is more valid (higher R �� -values) when the environmental aw is closer to the minimum growth level. This facilitated microbial growth predictions in liquid model systems that simulated refrigerated intermediate moisture foods. Regression equations on the basis of this relationship were used to predict lag time. In the case of B. thermosphacta growing in media with 3 % (aw=0.968), 6 % (aw=0.950) and 9 % NaCl(aw=0.944) the R �� values were 0.865,0.946 and 0.994,respectively. In the in- stance of media with 8 % (aw=0.973) and 20 % (aw=0.948) glycerol the R �� values were 0.998 and 0.999, respectively. In the case of P. fluorescens growing in media with NaCl(3 or 4 % )or glycerol (10 or 20 % ) the R �� -values were greater than0.99. The definition of a cumulative growth adaptation function and the above de- scribed models were used to predict the growth of B. thermosphacta at fluctuation temperatures and low aw(ca.0.94). The results were acceptable at a 95 % confidence level. |
本系統中英文摘要資訊取自各篇刊載內容。