Journal
FOOD CHEMISTRY
Volume 233, Issue -, Pages 228-236Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.04.118
Keywords
Carvacrol; Eugenol; Thymol; Vanillin; Immobilization; Silica support; Listeria innocua; Milk
Funding
- Ministerio de Economia, Industria y Competitividad
- FEDER funds (MINECO/FEDER) [AGL2015-70235-C2-1-R, AGL2015-70235-C2-2-R, MAT2015-64139-C4-1-R]
- Generalitat Valenciana [PROMETEOII/2014/047]
- Ministerio de Education, Cultura y Deporte [AP2010-4369]
- Electron Microscopy Service at the UPV
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The antimicrobial activity of essential oils components (EOCs) is well-known. However, their high volatility and powerful aroma limit their application in the formulation of a wide range of food products. In this context, the antimicrobial activity of carvacrol, eugenol, thymol and vanillin grafted onto the surface of three silica supports with different morphologies, textural properties and chemical reactivities (fumed silica, amorphous silica and MCM-41) was evaluated herein. Materials characterization revealed a good immobilization yield and all the devices showed a micro-scale particle size. Sensory evaluation revealed that sensory perception of EOCs decreases after covalent immobilization. Moreover, immobilization greatly enhanced the antimicrobial activity of the essential oil components against Listeria innocua and Escherichia coli compared to free components. The incorporation of EOCs immobilized on silica particles into pasteurized milk inoculated with L. innocua demonstrated their effectiveness not only for in vitro conditions, but also in a real food system. (C) 2017 Elsevier Ltd. All rights reserved.
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