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Molecules, Vol. 23, Pages 840: Antibacterial Activity of Emulsified Pomelo (Citrus grandis Osbeck) Peel Oil and Water-Soluble Chitosan on Staphylococcus aureus and Escherichia coli

Molecules, Vol. 23, Pages 840: Antibacterial Activity of Emulsified Pomelo (Citrus grandis Osbeck) Peel Oil and Water-Soluble Chitosan on Staphylococcus aureus and Escherichia coli

Molecules doi: 10.3390/molecules23040840

Authors: Guan-Wen Chen Yu-Hsin Lin Chia-Hua Lin Hsiao-Chin Jen

This study utilized pomelo steam distillation to isolate pomelo peel essential oil. The constituents were then analyzed through gas chromatography-mass spectrometry (GC-MS), and the antibacterial activity of the essential oil emulsions at different homogenizer speed conditions and concentrations of water-soluble chitosan (degree of acetylation, DA = 54.8%) against S. aureus and E. coli was examined. Analysis of the essential oil composition identified a total of 33 compounds with the main constituent, limonene accounting for 87.5% (940.07 mg/g) of the total. The pomelo peel oil was emulsified through homogenization at 24,000 rpm, resulting in a minimal inhibitory concentration (MIC) for E. coli that was 1.9 times lower than that of the essential oil without homogenization. In addition, a mixture of 0.4% essential oil emulsion and 0.03% water-soluble chitosan had the strongest synergetic antibacterial effect on S. aureus and E. coli at pH 7.4. In comparison with chitosan alone, the MIC value of this mixture was significantly 2.4 and 2.5 times lower. Hence, this study suggests using a mixture of emulsified pomelo peel oil and water-soluble chitosan to develop a novel natural food preservative, and that the processability of food, as well as the economic value of the byproducts of the Taiwan Matou pomelo and chitosan, could be increased.

Authors:   Chen, Guan-Wen ; Lin, Yu-Hsin ; Lin, Chia-Hua ; Jen, Hsiao-Chin
Journal:   Molecules
Volume:   23
edition:   4
Year:   2018
Pages:   840
DOI:   10.3390/molecules23040840
Publication date:   06-Apr-2018
Facts, background information, dossiers
  • water
  • Staphylococcus aureus
  • molecules
  • Escherichia coli
  • chitosan
  • Total
  • Taiwan
  • steam distillation
  • RPM
More about Molecular Diversity Preservation International
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