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Updated: Sep 17, 2025

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量化料成分的蛋白质消化动力学,使用经过修改的体外化试验
Shiyi Zhang1,2, Leon de Jonge1, Sonja de Vries1
1Animal Nutrition Group, Wageningen University & Research, Wageningen, The Netherlands.
Journal of animal science
|June 27, 2025
概括
这项研究量化了 (N) 在料成分中的溶解和水解,使用了体外检测. 鱼粉在胃阶段显示出最高的N溶解和低分子量 (LMWN).
科学领域:
- 动物营养 动物营养
- 生物化学 生物化学
- 食品科学 食品科学 食品科学
背景情况:
- 营养物质降解动力学对于料成分的营养价值至关重要.
- 了解料中的蛋白质消化对于优化动物饮食至关重要.
研究的目的:
- 在各种料成分中量化 (N) 溶解和水解的动力学.
- 用一个体外模型评估蛋白质含量和乳腺消化能力对N动态的影响.
主要方法:
- 一种经过修改的两步酶化体内化试验,模拟胃和小肠消化.
- 在多个时间点测量总溶解 (TSN) 和低分子量化合物 (LMWN).
- 包括特定的料成分:大麻粉 (RSM),鱼粉,大麦,大豆和小麦.
主要成果:
- 鱼粉在胃阶段表现出最高的N溶解率 (73%) 和LMWN (68%),pH变化后的N溶解速度快.
- 在小肠阶段,RSM和大麦显示出高溶解度,但与鱼粉和大豆相比,最终溶解度和LMWN略低.
- 刷边界酶模拟 (来自老鼠的Flavourzyme或肠粉) 并没有显著增加N溶解度或LMWN.
结论:
- 修改后的体外测定有效量化了料成分中的N溶解和LMWN动力学.
- 蛋白质特性显著影响N溶解和水解,影响潜在的体内吸收.
- 该测试为料成分蛋白质质量和消化动态提供了宝贵的见解.
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