Fully dilutable Thymus vulgaris essential oil:acetic or propionic acid microemulsions are potent fruit disinfecting solutions

被引:39
作者
Almasi, Laleh [1 ,2 ]
Radi, Mohsen [1 ,2 ]
Amiri, Sedigheh [1 ,2 ]
Torri, Luisa [3 ]
机构
[1] Islamic Azad Univ, Yasooj Branch, Dept Food Sci & Technol, Yasuj, Iran
[2] Islamic Azad Univ, Yasooj Branch, Young Researchers & Elite Club, Yasuj, Iran
[3] Univ Gastron Sci, Piazza Vittorio Emanuele 9, I-12042 Pollenzo Bra, Italy
关键词
Thymus vulgaris essential oil; Microemulsion; Nanoemulsion; Antimicrobial activity; Cosurfactants; ESCHERICHIA-COLI O157-H7; ANTIMICROBIAL ACTIVITY; ESSENTIAL OIL; LISTERIA-MONOCYTOGENES; NANOEMULSION; SOLUBILIZATION; INHIBITION; SURFACTANT;
D O I
10.1016/j.foodchem.2020.128411
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The aim of this study was to evaluate the effect of acetic (AA) or propionic (PA) acid as a cosurfactant on the microemulsion (ME) characteristics of Thymus vulgaris essential oil (TVO). The results showed that addition of propylene glycol to TVO/AA or PA:T80/water MEs gave dilutable systems with particles similar to 59 nm in diameter. Plain TVO showed the highest antimicrobial activity against E. coli, S. aureus, and S. typhi in in vitro antimicrobial tests, followed closely by AA/PA-MEs. The antimicrobial activity of AA/PA-MEs used as a washing solution on cucumber and strawberry samples was remarkably greater than those of free TVO, TVO nanoemulsions, and chlorhexidine solutions against E. coli and S. aureus. The sensory properties of the samples were not changed by the use of AA/PA-MEs at 0.05 or 0.1% TVO. The results introduce dilutable TVO:AA/PA-MEs for incorporation of TVO in aqueous systems for use as a fruit/vegetable disinfecting agent.
引用
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页数:10
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