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Publication type: Journal Article
Document type: Full Paper

Year: 2017

Author(s): El-Sayed, HS; Chizzola, R; Ramadan, AA; Edris, AE

Title: Chemical composition and antimicrobial activity of garlic essential oils evaluated in organic solvent, emulsifying, and self-microemulsifying water based delivery systems.

Source: Food Chemistry 2017; 221: 196-204



Authors Vetmeduni Vienna:

Chizzola Remigius

Vetmed Research Units
Institute of Animal Nutrition and Functional Plant Compounds


Abstract:
The chemical composition of garlic essential oils (GEOs) extracted from two different cultivars has been characterized using GC-MS analysis. GEO that was extracted from the white-skin cultivar (WGO) had a lower percentage of the major constituents diallyl trisulfide and diallyl disulfide (45.76 and 15.63%) than purple-skin cultivar (PGO) which contained higher percentages (58.53 and 22.38%) of the same components, respectively. Evaluation of the antimicrobial activity of WGO and PGO delivered in organic solvent (isopropanol) showed dose-dependent antimicrobial activity against the tested pathogenic bacteria and fungi, especially with WGO. On the other hand, formulation of both GEOs in water-based emulsions totally suppressed the antimicrobial activity of GEO. Re-formulation of GEOs in water-based microemulsion (particle size 10.1 nm) showed better antimicrobial activity than emulsions at the same concentration of GEOs. This study can assist in designing the proper water-based delivery system of GEO for application in food preservation. (C) 2016 Elsevier Ltd. All rights reserved.


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