頁籤選單縮合
題名 | 木糖-離胺酸梅納反應產物及其區分物抗氧化特性之研究=Antioxidant Effect of Xylose-Lysine Maillard Reaction Products and Its Fractionated Products |
---|---|
作者姓名(中文) | 顏國欽; 劉美麟; | 書刊名 | 中國農業化學會誌 |
卷期 | 35:3 1997.06[民86.06] |
頁次 | 頁273-287 |
分類號 | 463.7 |
關鍵詞 | 木糖; 離胺酸; 梅納反應產物; 抗氧化性; 自由基; Xylose; Lysine; Maillard reaction products; Antioxidant effect; Free radical; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以 1:2莫耳比的木糖和離胺酸在pH 9.0及l00 ℃ 加熱3 小時製備木糖-離 胺酸梅納反應產物 (XL MRPs),再利用乙醚和乙醇溶劑將 XLMRPs 區分成酸性、中性和鹼性 低分子量、乙醇可溶及不可溶等五種區分物,探討其抗氧化特性。乙醇可溶及不可溶區分物 是 XL MRPs 的主要區分物,分別佔 XL MRPs 的 79.51% 和 20.08%。 XL MRPs 在濃度 0.2 mg/mL 的抗氧化力 (POV%) 為 19.2,抑制脂質氧化的能力比生育醇好.但比 HBHA 弱。 其 抗氧化能力主要集中在乙醇可溶區分物中。以相同濃度進行比較時,酸性低分子二區分物的 還原力最強。 清除α, α -diphenyl- β - ppicry1hydrazyl 自由基和活性氧的能力與還 原酮結構有關,因此酸性低分子二區分物清除自由基和活性氧的能力也勝過其他區分物。在 濃度為 3.75 mg/mL 時,乙醇可溶和不可溶區分物螯合鐵離子能力已達 95% 以上, 但未區 分之 XL MRPs 的螯合能力仍不超過 10%, 造成此種現象的原因可能與酸性低分子量區分物 有關。至於中性和鹼性低分子量區分物除了有清除氫氧自由基和螯合鐵離子的能力外,則下 具有其他的抗氣化特性。 |
英文摘要 | The objectives of this study were to investigate the antioxidant acition of Maillard reaction products (preared by heating xylose and lysine at a molar ratio of 1:2, pH 9.0 and 100 ℃ for 3 h) and its fractionated products (by ethyl ether and ethanol as acidic, neutral and basic low molecular weight ethanol-soluble and ethanol-insoluble fractions) . The ethanol-soluble and ethanol-insoluble fractions were the major fracucts of the xyloselysine Maillard reaction products (XL MRPs). They contributed 79.51% and 20.08% in XL MRPs, respectively. The XL MRPs inhibited 80.8% peroxidation of the linoleic acid at 0.2 mg/mL. The antioxidant activity of the XL MRPs was stronger than that of tocopherol, but weaker than that of BHA. The ethanol-soluble fraction showed the strongest antioxidant activity among all the fractions of the XL MRPs. At the same concentration, the acidic low molecular weight fraction showed the strongest reducing power among all the fractions of the XL MRPs. Since the scavenging activities of the XL MRPs on α, α -diphenyl- β -picrylhydrazyl radical and active oxygen were related to its reductone structure, the acidic low molecular weight fraction also exhibited stronger scavenging effects than did the other fractions. The chelating effect of the ethanolsoluble and ethanol-insoluble fractions on Fe �� was above 95% while the chelating effect of the unfractionated XL MRPs was still less than 10% at a concentration of 3.75 mg/mL. This result was attributed to the acidic low molecular weight fraction. The neutral and basic low molecular weight fractions did not exhibit any antioxidant actions except for the effects of the scavenging hydroxyl radical and chelating Fe ��. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。