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在汁和葡萄汁中水溶性pectin结构的比较分析:对云稳定性的影响
Qian Li1, Shangdong Yan1, Jialu Huang1
1Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, Hubei 430068, China.
汁中的水溶性pectin (WSP) 的分子量和分支比pomelo WSP更高. 这种结构差异影响了果汁云的稳定性,色WSP与稳定性降低有关.
科学领域:
- 食品科学 食品科学 食品科学
- 生物化学 生化学
- 体科学 体科学 体科学
背景情况:
- 水溶性pectin (WSP) 在非从缩 (NFC) 的汁中对云的稳定性至关重要.
- 了解WSP结构-属性关系是优化果汁质量的关键.
研究的目的:
- 为了研究NFC汁 (O-WSP) 和果汁 (P-WSP) 中的WSP的物理化学和结构性质.
- 为了检查NFC类饮料中WSP结构和云稳定性之间的联系.
主要方法:
- 从子和葡萄果NFC果汁中分离和描述WSP.
- 使用原子力显微镜 (AFM) 和小角度X射线散射 (SAXS) 分析分子量,拉姆诺加拉克图隆I (RG-I) 分支和聚合.
- 对界面活动和临界聚合度 (CAC) 的评估.
主要成果:
- O-WSP度比P-WSP (0.43 mg/mL) 高 (0.73 mg/mL),而O-WSP度则比P-WSP (0.43 mg/mL) 高.
- O-WSP具有更高的分子量,更多分支的RG-I区域,并形成了更多的聚合结构.
- 与P-WSP相比,O-WSP表现出更强的界面活动和较低的CAC.
- WSP溶液的稳定性与NFC汁云的稳定性相关.
结论:
- O-WSP的结构特征 (较高的蛋白质,,RG-I含量,较强的界面活性,聚合倾向) 与NFC汁中的云稳定性降低有关.
- WSP结构显著影响NFC类饮料的状稳定性.
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