Preparation, characterization, and biological activity of Cinnamomum cassia essential oil nano-emulsion

To solve the problems of low bioavailability and unstable properties of Cinnamomum cassia Essential oil (CCEO), encapsulation technology was introduced as an effective means to improve its shortcomings. In this study, Cinnamomum cassia Essential oil nano-emulsion (CCEO-NE) was successfully synthesized by the oil-in-water method and characterized by standard analytical methods, including dynamic light scattering (DLS), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM). The results show that the synthesized CCEO is spherical, smooth in surface, and uniform in shape, with an average particle size of 221.8 +/-& nbsp;1.95 nm, which is amorphous. In this experiment, by simulating the digestion of CCEO-NE in the gastrointestinal tract, it was found that CCEO-NE was undigested in the oral cavity, mainly in the stomach, followed by the small intestine. By understanding the digestion of CCEO-NE, we can improve the potential of CCEO bioavailability in food and drug applications. In addition, through the study of ABTS and DPPH free radicals by CCEO and CCEONE, it was found that the antioxidant activity of CCEO-NE was more potent than that of CCEO. When the concentration of CCEO-NE and CCEO is 400 mu g/mL, the DPPH free radical scavenging rate is 92.03 +/-& nbsp;0.548% and 80.46 +/-& nbsp;5.811%, respectively. In comparison, ABTS free radical scavenging rate is 90.35 +/-& nbsp;0.480% and 98.44 +/-& nbsp;0.170% when the concentration of CCEONE, and CCEO is 75 mu g/mL, respectively. The antibacterial test shows that CCEO-NE can inhibit both Gram-positive and Gram-negative bacteria. Among them, CCEO-NE has a stronger antibacterial ability than CCEO, and the maximum inhibition zone diameter of CCEO can reach 15 mm, while that of CCEO-NE can reach 18 mm. Meanwhile, SEM and TEM showed that CCEO-NE treatment destroyed the ultrastructure of bacteria. Generally speaking, we know the situation of CCEO in the gastrointestinal tract. CCEONE has more potent antioxidant and antibacterial ability than CCEO. Our research results show that whey protein is an effective packaging strategy that can improve the effectiveness, stability, and even bioavailability of CCEO in various applications, including food and health care industries.

Automated summary

In this study, Cinnamomum cassia Essential oil nano-emulsion (CCEO-NE) was successfully synthesized and characterized. The results showed that CCEO-NE had a smaller particle size and stronger antioxidant and antibacterial activities compared to CCEO. Simulated digestion experiments revealed that CCEO-NE was undigested in the oral cavity and mainly digested in the stomach and small intestine. Overall, whey protein was found to be an effective encapsulation strategy to improve the efficacy and bioavailability of CCEO in various applications.