The Use of Ultrasonics for Stable Emulsion Preparation of Fir and Cedar Essential Oils

The study developed a stable nanoemulsion of fir and cedar essential oils using ultrasonic vibrations, with Tween 80 as the optimal emulsifier at a 1:2 ratio to the oils. This method, involving a 22 kHz ultrasonic generator and ice bath processing, produced a superior emulsion compared to traditional methods. The nanoemulsion enhances the oils' antibacterial, anti-inflammatory, antifungal, and antiviral properties, and can be applied in the food industry to improve antibacterial activity, shelf life, and nutritional value, as well as in cosmetics and pharmaceuticals for oral and transdermal use.