不同加工处理条件下壳聚糖稳定硒纳米颗粒的物理化学和功能特性。
Physicochemical and functional properties of chitosan-stabilized selenium nanoparticles under different processing treatments.
机构信息
Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China.
Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China; Xinghua Industrial Research Centre for Food Science and Human Health, China Agricultural University, Xinghua 225700, Jiangsu, China.
出版信息
Food Chem. 2020 Nov 30;331:127378. doi: 10.1016/j.foodchem.2020.127378. Epub 2020 Jun 20.
Selenium nanoparticles (SeNPs) have been well-characterized; however, whether processing affects their physicochemical and functional properties remains unknown. Here, chitosan (low and high molecular weight; CS(L) and CS(H), respectively) was used to stabilize SeNPs, and the effects of heating (37 ℃, 70 ℃, and 95 ℃), freeze-drying-rehydration, and freeze-thawing on CS-SeNPs physicochemical stability, Se release, antioxidant capacity, and antibacterial activity were evaluated. The results demonstrated that all treatments could cause CS-SeNPs aggregation and Se release to varying degrees. Aggregation of CS-SeNPs decreased their antibacterial activity, while Se release increased their antioxidant capacity with negligible effects on antibacterial activities. None of the CS-SeNPs could tolerate freeze-thawing. CS(H)-SeNPs exhibited better rehydration and heating stability than CS(L)-SeNPs, although "rod-like" triclinic crystalline Se in CS(H)-SeNPs, produced by 95℃ heating, decreased both antioxidant and antibacterial activities. Thus, these results provide a theoretical basis for the development and suitable application of CS-SeNPs.
硒纳米颗粒（SeNPs）已经得到了很好的表征；然而，处理是否会影响它们的物理化学和功能特性尚不清楚。在这里，壳聚糖（低分子量和高分子量；CS(L)和 CS(H)）被用来稳定 SeNPs，并评估了加热（37°C、70°C 和 95°C）、冻干-复水、冻融对 CS-SeNPs 物理化学稳定性、硒释放、抗氧化能力和抗菌活性的影响。结果表明，所有处理都可能导致 CS-SeNPs 不同程度的聚集和硒释放。CS-SeNPs 的聚集降低了其抗菌活性，而硒释放增加了其抗氧化能力，对抗菌活性几乎没有影响。没有一种 CS-SeNPs 能够耐受冻融。CS(H)-SeNPs 比 CS(L)-SeNPs 具有更好的复水和加热稳定性，尽管在 95°C 加热下产生的 CS(H)-SeNPs 中的“棒状”三斜晶硒降低了抗氧化和抗菌活性。因此，这些结果为 CS-SeNPs 的开发和合适应用提供了理论基础。
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