College of Engineering, China Agricultural University, Beijing 100083, China.
College of Engineering, China Agricultural University, Beijing 100083, China.
Food Chem. 2020 Jul 30;319:126597. doi: 10.1016/j.foodchem.2020.126597. Epub 2020 Mar 10.
This research explored the application of combined radio frequency and hot air drying (RF-HAD) technology on corn seeds. Drying characteristics and seed vigor were investigated at different RF electrode gaps (140, 150 and 160 mm). To better demonstrate the feasibility of applying RF-HAD on corn seeds, tempering-intermittent hot air drying (HAD) was studied as a comparison. Reduced electrode gap corresponding to elevated average heating rate and power efficiency resulted in decreased seeds vigor and specific energy consumption. The assistance of RF significantly increased the drying rate of corn seeds and reduced drying duration by up to 70% compared with HAD. A higher dehydrogenase activity (DHA) but a lower germination percentage (GP) was observed in RF-HAD samples as compared with HAD ones. Corn seeds were promoted to be dormant by RF-HAD according to dormancy-breaking results and isobaric tags for relative and absolute quantification (iTRAQ) analysis.
本研究探讨了射频和热空气联合干燥（RF-HAD）技术在玉米种子上的应用。在不同的射频电极间隙（140、150 和 160mm）下，研究了干燥特性和种子活力。为了更好地展示 RF-HAD 在玉米种子上应用的可行性，研究了调质间歇式热空气干燥（HAD）作为比较。减小电极间隙导致平均加热速率和功率效率提高，从而降低了种子活力和比能消耗。与 HAD 相比，射频的辅助显著提高了玉米种子的干燥速率，干燥时间缩短了 70%。与 HAD 相比，RF-HAD 样品的脱氢酶活性（DHA）更高，但发芽率（GP）更低。根据休眠破除结果和等压标签相对和绝对定量（iTRAQ）分析，RF-HAD 促进了玉米种子进入休眠状态。
