Here, we investigated the effect of cold plasma (CP) on the biological activities of phloroglucinol. Phloroglucinol (7.92 and 15.84 mM in methanol) was treated with air dielectric barrier discharge plasma at 250 W. In vitro, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity and ferrous-reducing antioxidant power (FRAP) values of phloroglucinol increased in plasma treatment in a time-dependent manner. CP treatment of phloroglucinol decreased the lipid oxidation of oil emulsion during storage and increased the antimicrobial activity against Bacillus cereus, Escherichia coli O157:H7, and Staphylococcus aureus. Angiotensin-converting enzyme (ACE) inhibitory activity of phloroglucinol increased and total phenolic content decreased based on CP treatment. The CP-induced polymerization of phloroglocinol to phlorotannin derivatives was identified using high-performance liquid chromatography with UV detector and electrospray ionization/mass spectrometry (HPLC-UV-ESI/MS) method. Consequently, the polymer structure of phloroglucinol was found in the CP-treated phloroglucinol. In addition, CP enhances the biological activity of phloroglucinol and could be applied to bioactive materials in food and related industries.

中文翻译：

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血浆聚合的鞣花单宁及其增强的生物活性。

在这里，我们研究了冷血浆（CP）对间苯三酚的生物活性的影响。用250 W的空气电介质阻挡放电等离子体处理间苯三酚（7.92和15.84 mM，在甲醇中）。在体外，1,1-二苯基-2-吡啶并肼基（DPPH）的自由基清除活性和亚铁还原抗氧化能力（FRAP）值血浆中间苯三酚的含量以时间依赖性方式增加。间苯三酚的CP处理降低了贮藏期间油乳剂的脂质氧化，并增强了对蜡状芽孢杆菌，大肠杆菌O157：H7和金黄色葡萄球菌的抗菌活性。CP处理后，间苯三酚的血管紧张素转换酶（ACE）抑制活性增加，总酚含量降低。使用高效液相色谱仪，紫外检测器和电喷雾电离/质谱法（HPLC-UV-ESI / MS），鉴定了CP诱导的间苯三酚聚合为间苯二酚衍生物。因此，在CP处理的间苯三酚中发现了间苯三酚的聚合物结构。此外，CP可增强间苯三酚的生物活性，可用于食品和相关行业中的生物活性材料。