Gong Xiping, Wang Minghe, Lu Peng, Zhou Hualu
Department of Food Science and Technology, College of Agricultural and Environmental Sciences, University of Georgia, Griffin, GA 30223, USA.
Department of Agricultural Leadership, Education and Communication, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, USA.
Foods. 2024 Dec 6;13(23):3945. doi: 10.3390/foods13233945.
The incorporation of polyphenols into food systems provides various health benefits, yet their stability and bioactivity are often compromised by processing conditions. In this study, we advanced the pH-driven method for processing highly pH-sensitive polyphenols, such as quercetin, by optimizing operating conditions, including minimizing oxygen exposure and reducing operating times. As a result, an improved post-pH-driven (PPD) method was developed to encapsulate pH-sensitive quercetin into nanoemulsions with an encapsulation efficiency exceeding 95%, indicating that this method could be broadly applicable for incorporating various polyphenols. For example, it has been successfully applied to upcycle plant polyphenols from peanut skin into nanoemulsions, serving as a representative food model. The PPD method demonstrated superior performance compared to a conventional water-based method, achieving 1.8 times higher remaining percentage of total polyphenolic content. Additionally, the PPD-based nanoemulsions exhibited significantly enhanced antioxidant properties, with DPPH and ABTS radical scavenging activities increasing by 3.7 and 2.8 times, respectively, compared to the water-based method. These findings underscore the potential of the PPD method as a versatile and efficient approach for developing polyphenol-powered foods by upcycling plant byproducts and improving processing efficiency.
将多酚纳入食品体系可带来多种健康益处，但其稳定性和生物活性常常会受到加工条件的影响。在本研究中，我们通过优化操作条件，包括尽量减少氧气暴露和缩短操作时间，改进了用于处理高度pH敏感型多酚（如槲皮素）的pH驱动法。结果，开发出了一种改进的后pH驱动（PPD）法，可将pH敏感型槲皮素封装到纳米乳液中，封装效率超过95%，这表明该方法可广泛应用于多种多酚的纳入。例如，它已成功应用于将花生皮中的植物多酚升级转化为纳米乳液，作为一种典型的食品模型。与传统的水基方法相比，PPD方法表现出更优的性能，总多酚含量的剩余百分比高出1.8倍。此外，基于PPD的纳米乳液表现出显著增强的抗氧化性能，与水基方法相比，DPPH和ABTS自由基清除活性分别提高了3.7倍和2.8倍。这些发现凸显了PPD方法作为一种通用且高效的方法的潜力，该方法可通过升级利用植物副产品和提高加工效率来开发富含多酚的食品。
