High-Intensity, Low-Frequency Ultrasound Treatment as Sustainable Strategy for Innovative Biomaterials with Antioxidant Activity from Tomatoes, Hemp, and Hops By-Products

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Celton, Colleen Siobhan




This study focused on ultrasound application as a green platform adding values from agricultural waste in two different contexts. Ultrasound was used to increase efficiency of extraction of bioactive compounds such as saponins and phenolics in tomato skin, hemp meal and hops flowers. Ultrasound was used to create stable emulsion gels from byproducts/leftovers of tomato skin, hemp meal and hops flowers to produce green biomaterials. It was found that ultrasound treatment reduced extraction time for saponin and phenolic acid from 24h to 30 min. Influence of ultrasound was also shown to have no impact on antioxidative capacity of extract. Ultrasound treatment was shown to positively impact the overall microscopic structure and qualities of bioplastic such as water activity, % moisture, hardness, cohesiveness, resilience, and springiness index. This study suggests that ultrasound can be used as sustainable non-thermal method for extraction of active saponins and phenolics, enhancing their physico-chemical characteristic in bioplastic materials


Food Science and Technology




Carleton University

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