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. 2015 Aug 31;4(2):156-62.
doi: 10.1002/fsn3.269. eCollection 2016 Mar.

Influence of Extraction Methods on Antioxidant and Antimicrobial Properties of Essential Oil From Thymua Danesis Subsp. Lancifolius

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Free PMC article

Influence of Extraction Methods on Antioxidant and Antimicrobial Properties of Essential Oil From Thymua Danesis Subsp. Lancifolius

Yousef Tavakolpour et al. Food Sci Nutr. .
Free PMC article

Abstract

The essential oil (EO) from dried ground powder leaves and stems of Thymua danesis was extracted using hydrodistillation (HD), ohmic extraction (OE), ultrasound-assisted HD and ultrasound-assisted OE methods. Then, the antioxidant, antimicrobial, and sensory properties of the EO were investigated both in vitro and in food systems. Thyme EO extracted by ultrasound-assisted HD method had promising antibacterial activities against Escherichia coli and Staphylococcus aureus and had the best antioxidant properties when tested in vitro. In food systems, higher concentrations of the EO were needed to exert similar antibacterial and antioxidant effects. Furthermore, thyme EO added yogurt and drink yogurt revealed better sensory properties than the control and fresh samples. Essential oil from Thymua danesis has a good potential to be used as an antioxidant, antimicrobial, and flavoring agent in food systems and the extraction method effects on the antioxidant and antimicrobial properties of the thyme extract.

Keywords: Antimicrobial; Thymua danesis; antioxidant; essential oil; extraction.

Figures

Figure 1
Figure 1
Antimicrobial activity of the EO in yogurt and drink yogurt samples against coliforms. In each column different letters indicate significant differences (P < 0.05).
Figure 2
Figure 2
Antimicrobial activity of the EO in yogurt and drink yogurt samples against fungus. In each column different letters indicate significant differences (P < 0.05).
Figure 3
Figure 3
Effect of adding thyme EO on the acidity of the yogurt and drink yogurt samples. In each column different letters indicate significant differences (P < 0.05).
Figure 4
Figure 4
Effect of adding thyme EO on the sensory properties of the yogurt and drink yogurt samples. In each column different letters indicate significant differences (P < 0.05).

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