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頁籤選單縮合
題 名 | 油茶籽儲藏條件對壓榨油品質之影響=Influence of Storage Conditions of Camellia brevistyla Seeds on the Quality of Pressed Oils |
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作 者 | 謝靜敏; 楊正釧; 盧虎生; 莊曜駿; 徐光平; 李雅琳; | 書刊名 | 臺灣農業研究 |
卷 期 | 67:3 2018.09[民107.09] |
頁 次 | 頁292-300 |
分類號 | 466.17 |
關鍵詞 | 小果油茶籽; 油茶籽儲藏條件; 種子含水率; 儲藏溫度; 油脂品質; Camellia brevistyla seed; Oilseed storage condition; Moisture content of seed; Storage temperature; Oil quality; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗將採收後立即乾燥至含水率6.5%及12%的台灣原生小果油茶(短柱山茶,Camellia brevistyla)種子,於-20、4、15℃環境下密封儲藏半年後榨油,將初榨油保存在密封的玻璃瓶中,於4℃儲放半年後開封,進行油脂的酸價、過氧化價、酚類化合物含量、還原力、維生素E含量、油脂氧化安定性等分析。結果顯示,只要是無霉爛現象品質良好的油茶籽,經過半年儲藏後壓榨的油脂品質,其酸價、過氧化價等均可與鮮榨油相當,仍具有良好的食用品質。另仿效家庭使用習慣,將油脂放置於4℃冰箱,時常打開瓶蓋取用,再經過半年後檢測。結果顯示,含水率6.5%的油茶籽,在4℃以下儲藏者的壓榨油品質較佳,而保存於-20℃的油茶籽壓榨油,不僅其內含酚類化合物及還原力的衰減最少,且具有最佳的氧化安定性,此時仍可達到壓榨苦茶油國家一級品質標準(酸價< 1.5、過氧化價< 6)。 |
英文摘要 | Camellia brevistyla is an indigenous Taiwanese camellia tree. After harvested, the seeds were dried immediately to a moisture content of 6.5% or 12%. Then, the seeds were stored at conditions of -20, 4, or 15℃ for 6 mo before pressed for oil. Following pressing, all the oils were sealed in glass bottles and preserved at 4℃ for 6 mo, and then subjected to analyses of acid value (AV), peroxide value (POV), phenolic content, reducing power, vitamin E content, and oxidative stability. Results indicated that all the oils were comparable to the freshly pressed ones, retaining good edible quality with the evaluation standards of AV < 1.0 and POV < 20 and the common food grade pressed oil standard. All these oil samples were continually kept at 4℃ for another 6 mo storage and then subjected to reanalyzing. During this period, occasionally opening of and withdrawing some oils from the bottles were conducted to imitate a common household habit. The results indicated that the oils from seeds with lower moisture content (6.5%) and stored at temperatures below 4℃ had a better quality. Besides, the oil from seeds stored at the lowest temperature -20℃ had the best oxidative stability, which still attained the first grade camellia tea oil quality as stipulated in the national standard (AV < 1.5, POV < 6). Its phenolic content and reducing power showed the least reduction from those at the moment when unsealing (6 mo ago). |
本系統中英文摘要資訊取自各篇刊載內容。