Matłok Natalia, Piechowiak Tomasz, Zardzewiały Miłosz, Gorzelany Józef, Balawejder Maciej
Department of Food and Agriculture Production Engineering, University of Rzeszow, St. Zelwerowicza 4, 35-601 Rzeszów, Poland.
Department of Chemistry and Food Toxicology, University of Rzeszow, St. Ćwiklińskiej 1a, 35-601 Rzeszów, Poland.
Plants (Basel). 2020 Nov 24;9(12):1637. doi: 10.3390/plants9121637.
This study presents the effects of ozone treatment on microbial status and contents of selected bioactive compounds in marjoram plants. L. is a widely used plant which in the course of production is affected by microbial infections. One of the ways to reduce microbial load involves application of a strong oxidant, such as ozone. In order to determine the effects of ozonation, a number of analyses were carried out including microbiological tests (aerobic colony count, yeast and mould count, and mesophilic lactic acid bacteria count) and chemical tests assessing total antioxidant potential, total polyphenols, and volatile fraction composition. Ultimately, the findings showed considerable (6-log) reduction in microbial load, with unchanged composition of headspace volatile compounds. Furthermore, the raw material obtained presented elevated the contents of the selected bioactive compounds. It was shown that the most beneficial effects are achieved when ozone treatment is applied at a rate of 1 ppm for a duration of 10 min.
本研究呈现了臭氧处理对墨角兰植物微生物状况及所选生物活性化合物含量的影响。墨角兰是一种广泛使用的植物，在生产过程中会受到微生物感染。减少微生物负荷的方法之一是使用强氧化剂，如臭氧。为了确定臭氧处理的效果，进行了多项分析，包括微生物测试（需氧菌落计数、酵母菌和霉菌计数以及嗜温乳酸菌计数）和评估总抗氧化潜力、总多酚和挥发性成分组成的化学测试。最终，研究结果表明微生物负荷显著降低（6个对数级），顶空挥发性化合物的组成未发生变化。此外，所获得的原材料中所选生物活性化合物的含量有所提高。结果表明，当以1 ppm的速率进行10分钟的臭氧处理时，可取得最有益的效果。
