Abstract：
The utilization of essential oils as natural antioxidants and preservatives is limited by high volatility, poor water solubility, and long-term instability. To address this, a novel ultrasonic-assisted method was used to prepare and stabilize a nanoemulsion of turmeric essential oil-in-water, incorporating bioactive components extracted from Spirulina platensis. Ultrasonic treatment enhanced the extraction efficacy and nanoemulsion stability. Algal biomass subjected to ultrasonic treatment (30 min at 80% amplitude) yielded a dry extract of 73.66 ± 3.05%, with the highest protein, phenolic, phycocyanin, and allophycocyanin content, as well as maximum emulsifying activity. The resulting nanoemulsion (5% oil, 0.3% extract, 10 min ultrasonic treatment) showed reduced particle size (173.31 ± 2.24 nm), zeta potential (-36.33 ± 1.10 mV), low polydispersity index, and enhanced antioxidant and antibacterial properties. Rheology analysis indicated shear-thinning behavior, while microscopy and spectroscopy confirmed structural changes induced by ultrasonic treatment and extract concentration. This initiative developed a novel ultrasonic-assisted algal-based nanoemulsion with antioxidant and antibacterial properties.
摘要：
精油作为天然抗氧化剂和防腐剂的利用受到高挥发性的限制，水溶性差，和长期的不稳定。为了解决这个问题，一种新的超声辅助方法用于制备和稳定姜黄精油在水中的纳米乳液，掺入了从钝顶螺旋藻中提取的生物活性成分。超声处理增强了提取效果和纳米乳稳定性。经过超声波处理（80％振幅30分钟）的藻类生物质产生73.66±3.05％的干提取物，蛋白质含量最高，酚醛,藻蓝蛋白,和别藻蓝蛋白含量，以及最大的乳化活性。所得纳米乳液（5%油，0.3%提取物,10分钟超声处理)显示颗粒尺寸减小(173.31±2.24nm),zeta电位(-36.33±1.10mV),低的多分散指数，和增强的抗氧化和抗菌性能。流变分析表明剪切稀化行为，而显微镜和光谱学证实了超声处理和提取物浓度引起的结构变化。该计划开发了一种具有抗氧化和抗菌性能的新型超声辅助藻类纳米乳液。
