Department of Food Science and Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Research Group for Food Production Engineering, National Food Institute, Technical University of Denmark, SøltoftsPlads, 2800 Kgs. Lyngby, Denmark.
Food Chem. 2021 Jun 1;346:128974. doi: 10.1016/j.foodchem.2020.128974. Epub 2020 Dec 31.
The effects of argon and nitrogen cold plasma treatments on the lipolytic enzymes activity in wheat germ were investigated. Using argon as plasma gas, the residual activity of lipase and lipoxygenase decreased to 42.50% and 87.72%, respectively after 30 min. Switching plasma input gas to nitrogen, the residual activities of lipase and lipoxygenase after the same time of atmospheric cold plasma (ACP) treatment were 77.50% and 92.52%, respectively. The antioxidant potential and phenolic compounds show no significant difference during ACP duration. However, the remaining activities of lipase and lipoxygenase after 30 min steam autoclaving were 6.25% and 18.60%, respectively. Also, the antioxidant activity and total phenolic content reduced by 14.70% and 30.80%, respectively. In brief, the ACP treatment efficiency was function of the input gas and the treatment time. The presented results about the input gas impacts would be useful in industrial development of ACP application for wheat germ stabilization.
研究了氩气和氮气冷等离子体处理对小麦胚芽中脂肪酶和脂氧合酶活性的影响。使用氩气作为等离子体气体，经过 30 分钟处理后，脂肪酶和脂氧合酶的残余活性分别降至 42.50%和 87.72%。将等离子体输入气体切换为氮气后，在相同的大气压冷等离子体（ACP）处理时间后，脂肪酶和脂氧合酶的残余活性分别为 77.50%和 92.52%。ACP 过程中抗氧化潜力和酚类化合物没有明显差异。然而，经过 30 分钟蒸汽高压灭菌后，脂肪酶和脂氧合酶的剩余活性分别为 6.25%和 18.60%。此外，抗氧化活性和总酚含量分别降低了 14.70%和 30.80%。简而言之，ACP 处理效率取决于输入气体和处理时间。关于输入气体影响的研究结果将有助于 ACP 应用于小麦胚芽稳定化的工业发展。
