College of Food Science, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.
College of Food Science, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.
Ultrason Sonochem. 2024 Oct;109:106996. doi: 10.1016/j.ultsonch.2024.106996. Epub 2024 Jul 16.
Extraction of coconut paring oil (CPO) from processing by-products adds value to the product and reduces resource wastage. This study aims to assess the impact of 20 kHz, 20/80 kHz and 20/40/80 kHz of multi-frequency ultrasonic-assisted enzymatic extraction (MFUAEE) on the yield, physicochemical properties, fatty acid composition, total phenolic content, antioxidant activity, and emulsion stability of CPO derived from wet coconut parings (WCP). Results revealed that the CPO extraction yield with MFUAEE was 32.58 % - 43.31 % higher compared to AEE. The tri-frequency 20/40/80 kHz mode of multi-frequency ultrasound pretreatment exhibited the highest CPO extraction yield (70.08 %). The oil extracted through MFUAEE displayed similar fatty acid profiles to AEE, but had lower peroxide value, K and K values. Particularly, MFUAEE oil contained higher total phenolic content and exhibited potent DPPH free radical scavenging capacity. Results observed by SEM indicated that the pretreatment with multi-frequency ultrasound more efficiently disrupts the cellular structure of the WCP. Additionally, MFUAEE enhanced emulsion stability through the cavitation effect of ultrasound. These findings suggest that MFUAEE is a valuable approach for method for obtaining CPO with elevated extraction yield and superior quality, thereby enhancing the utilization of coconut by-products.
从加工副产物中提取椰子油（CPO）可以增加产品附加值并减少资源浪费。本研究旨在评估 20 kHz、20/80 kHz 和 20/40/80 kHz 多频超声辅助酶法提取（MFUAEE）对湿椰壳副产物（WCP）来源的 CPO 的产率、理化性质、脂肪酸组成、总酚含量、抗氧化活性和乳液稳定性的影响。结果表明，与 AEE 相比，MFUAEE 的 CPO 提取产率提高了 32.58%至 43.31%。三频 20/40/80 kHz 模式的多频超声预处理表现出最高的 CPO 提取产率（70.08%）。MFUAEE 提取的油与 AEE 具有相似的脂肪酸谱，但过氧化物值、K 值和 K 值较低。特别是，MFUAEE 油含有更高的总酚含量，并表现出强大的 DPPH 自由基清除能力。SEM 观察到的结果表明，多频超声预处理更有效地破坏了 WCP 的细胞结构。此外，MFUAEE 通过超声空化效应增强了乳液稳定性。这些发现表明，MFUAEE 是一种有价值的方法，可以获得产率更高、质量更优的 CPO，从而提高椰子副产物的利用率。
