Chemical composition and antimicrobial activity of essential oils from leaves and rhizomes of Curcuma zedoaria obtained via supercritical fluid extraction

Thin, Dau B.; Thinh, B. B.; Hanh, Do Hong

doi:10.5377/nexo.v35i04.15553

Cited by 2 publications

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“…Essential oil analysis. The essential oils were examined using gas chromatography (GC) and gas chromatography-mass spectrophotometry (GC-MS), following the same methods as previously described [17,18]. The GC analysis was performed using an Agilent Technologies 7890A GC, which was equipped with a flame ionization detector (FID) and an HP-5MS chromatographic column (i.d.…”

Section: Methodsmentioning

confidence: 99%

“…ИЗВЕСТИЯ ВУЗОВ. ПРИКЛАДНАЯ ХИМИЯ И БИОТЕХНОЛОГИЯ 2023 Том 13 N 2 minimum inhibitory concentration (MIC) of the essential oils was determined using the broth microdilution susceptibility method, as previously described [17,18]. The bacteria were cultured in Mueller-Hinton broth (MHB) and C. albicans was cultured in Sabouraud broth (SB).…”

Section: изменениям состава эфирного масла и сохранению его исходного...mentioning

confidence: 99%

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Changes in essential oil composition of <i>Thymus vulgaris</i> under different storage conditions and its antimicrobial activity

Trong

Thinh

2023

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

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Thyme (Thymus vulgaris L.) has been used for centuries in traditional medicine due to its various health benefits, and it is widely used today in aromatherapy, cosmetics, and even as a culinary herb. This study aimed to investigate how the chemical compositions and antimicrobial activity of essential oils extracted from the aerial parts of T. vulgaris were affected by storage at different temperatures. The essential oils were obtained by hydrodistillation of air-dried samples and analyzed using gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The study observed changes in the essential oil’s composition when stored in a refrigerator (4 °C) and at room temperature (25 °C) for three months. The results revealed that the proportions of compounds with lower boiling temperatures such as β-myrcene (2.29–0.20%) and α-pinene (2.74–0.24%) along with γ-terpinene (7.84–4.81%) and p-cymene (10.93–5.61%) as thymol and carvacrol precursors, were significantly decreased when stored at room temperature. However, the amounts of thymol and carvacrol increased by 51.64 and 21.81%, respectively, after three months storage period, indicating a rise in the oil quality index. Storing the essential oil in a refrigerator resulted in minimal changes to the essential oil composition and maintained its primary quality. In addition, the antimicrobial activity of the essential oils was tested using the broth microdilution method and demonstrated that the essential oils from both storage methods retained their antimicrobial activity compared to freshly extracted ones. In summary, these findings are beneficial for essential oil producers and consumers in the pharmaceutical and cosmetic industries.

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Section: Methodsmentioning

confidence: 99%

Section: изменениям состава эфирного масла и сохранению его исходного...mentioning

confidence: 99%

Changes in essential oil composition of <i>Thymus vulgaris</i> under different storage conditions and its antimicrobial activity

Trong

Thinh

2023

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

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Chemical composition, antimicrobial and larvicidal activities of essential oils of two Syzygium species from Vietnam

et al. 2024

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The present study is the first to investigate the chemical composition, antimicrobial and larvicidal activities of the essential oils from the leaves of Syzygium attopeuense (Gagnep.) Merr. & L.M.Perry and Syzygium tonkinense (Gagnep.) Merr. & L.M.Perry collected in Vietnam. The essential oils were extracted by hydrodistillation and analyzed by GC and GC–MS. The study indicated the presence of a high percentage of sesquiterpenes in both investigated essential oils. The major components of S. attopeuense essential oil were bicyclogermacrene (24.26%), (E)-caryophyllene (11.72%), and (E)-β-ocimene (6.75%), whereas S. tonkinense essential oil was dominated by (E)-caryophyllene (80.80%). The antimicrobial activity of essential oils was evaluated by broth microdilution assay to determine the minimum inhibitory concentration (MIC) and median inhibitory concentration (IC50). Both essential oils exhibited remarkable inhibitory activity against all tested Gram-positive bacteria and yeast than Gram-negative bacteria. Among them, essential oils of S. attopeuense and S. tonkinense possessed the strongest activity against Enterococcus faecalis (MIC = 4.00 μg/mL; IC50 = 1.69 μg/mL) and Candida albicans (MIC = 16.00 μg/mL; IC50 = 8.67 μg/mL), respectively. Furthermore, the larvicidal activity of essential oils was tested using fourth-instar larvae of Aedes aegypti. Results from the larvicidal test revealed that both essential oils had an excellent inhibitory effect against A. aegypti larvae with LC50 values from 25.55 to 30.18 μg/mL and LC90 values from 33.00 to 39.01 μg/mL. Our findings demonstrate that the essential oil extracted from S. attopeuense and S. tonkinense are potential sources of natural antimicrobials and can act as inexpensive mosquito larvicidal agents.

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Chemical composition and antimicrobial activity of essential oils from leaves and rhizomes of Curcuma zedoaria obtained via supercritical fluid extraction

Cited by 2 publications

References 20 publications

Changes in essential oil composition of <i>Thymus vulgaris</i> under different storage conditions and its antimicrobial activity

Changes in essential oil composition of <i>Thymus vulgaris</i> under different storage conditions and its antimicrobial activity

Chemical composition, antimicrobial and larvicidal activities of essential oils of two Syzygium species from Vietnam

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