State Key Laboratory of Natural Medicines, Department of Pharmacognosy, China, Pharmaceutical University, No. 639 Longmian Road, Nanjing 211198, China.
Cape Coast Technical University, School of Applied Science and Technology, Department of Food Science and Postharvest Technology, Cape Coast, Ghana.
Ultrason Sonochem. 2021 Dec;80:105841. doi: 10.1016/j.ultsonch.2021.105841. Epub 2021 Nov 22.
We assessed the impact of selected pretreatment techniques, thus, vacuum-assisted osmotic dehydration (VOD), vacuum-assisted sonication (VSON) and vacuum-assisted osmosonication (VOS) on the metabolomes and quality characteristics of infrared-dried ginger slices. We found marked metabolome differences between the pretreated ginger samples, evidenced by differential amounts of 6-gingerol and 6-shogaol, total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activities. We also found distinct differences in the drying kinetics and sensory characteristics of the pretreated samples. Generally, VOS pretreatment gave the best outcomes. The VOS-pretreated samples contained the highest contents of the marker compounds, TPC, TFC and gave the best antioxidant activity. The VOS-pretreated samples also recorded the shortest drying time and exhibited the best sensory attributes. Overall, the general order observed was, VOS > VSON > VOD > control for all quality parameters examined. VOS pretreatment of ginger before drying therefore holds a great potential for large-scale industrial application.
我们评估了选定预处理技术（即真空辅助渗透脱水（VOD）、真空辅助声处理（VSON）和真空辅助声渗透处理（VOS））对红外干燥姜片代谢组学和质量特性的影响。我们发现预处理姜样品之间存在明显的代谢组差异，表现在 6-姜酚和 6-姜烯酚、总酚含量（TPC）、总黄酮含量（TFC）和抗氧化活性的差异上。我们还发现预处理样品的干燥动力学和感官特性存在明显差异。一般来说，VOS 预处理效果最好。VOS 预处理的样品中含有最高含量的标志物化合物、TPC、TFC，具有最佳的抗氧化活性。VOS 预处理的样品干燥时间最短，感官属性最佳。总体而言，在所检查的所有质量参数中，观察到的一般顺序是，VOS>VSON>VOD>对照。因此，在干燥前对生姜进行 VOS 预处理具有很大的工业化应用潜力。
