阿尔多尔凝结产品在植物性蛋白质来源中的存在和影响
Chloe V Mayo1,2, Dimitris P Balagiannis2, Valentina Stojceska3
1Department of Chemical Engineering, Wolfson Centre for Sustainable Materials Development and Processing, Brunel University of London, Kingston Lane, Uxbridge UB8 3PH, U.K.
Journal of agricultural and food chemistry
|March 3, 2025
概括
植物蛋白中的非注释,如豆蛋白分离物,起源于脂质氧化. 研究人员确定了导致旧肥气味的特定化物,与蛋白质提取和干燥过程有关.
科学领域:
- 食品化学 食品化学
- 感官科学 感官科学
- 蛋白质化学 蛋白质化学
背景情况:
- 植物性蛋白质中的淡味通常源于脂质氧化.
- 豆蛋白分离物表现出不良的"旧肥"气味.
- 这些气味的化学来源以前没有被描述.
研究的目的:
- 为了确定在豆蛋白分离物中引起"老肥"气味的挥发性化合物.
- 为了研究这些气味活性化合物的形成途径.
- 为了比较这些化合物在不同植物蛋白质来源中的存在.
主要方法:
- 豆蛋白分离物的气色谱-光度计 (GC-O) 分析.
- 已识别的α,β不和化物的化学合成.
- 感官评估和比较各种蛋白质分离物 (豆类,大米,大豆,大麻,乳清).
主要成果:
- 之前未被描述的α,β-不和化物,通过 pentanal 和 hexanal 的 aldol 凝结形成,被确定为"旧肥"气味的来源.
- 这些化物被证实在非常低的度下具有高度的气味活性.
- 在大米,大豆和大麻蛋白质分离物中发现了类似的化物,但在乳清蛋白中没有发现.
结论:
- 制造过程,特别是隔离和干燥,是豆蛋白中这些无气味化合物的形成的关键因素.
- 化物的阿尔多尔凝结产物是植物性蛋白质中不良气味的重要贡献者.
- 乳清蛋白似乎没有这些特定的引起气味的化合物,这表明加工或组成的差异.
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