An investigation of chemical composition and antimicrobial activity of essential oils extracted from Aeollanthus and Plectranthus species

Ngo-Mback, M.N.L.; Famewo, Elizabeth Bosede; MubarakAli, D.; Eke, Pierre; Thajuddin, Nooruddin; Afolayan, A. J.; Dongmo, Pierre Michel Jazet; Boyom, Fabrice Fekam

doi:10.1016/j.bcab.2019.101412

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…In addition, (E)-2-hexenal has significant antibacterial activity against food spoilage and pathogenic microbial species [ 31 ]. 2-Isopropyl-5-methyl-9-methylenebicyclo[4.4.0]dec-1-ene is also an aromatic compound often found in plant essential oils and those essential oils possessed stronger repellency activity against pests [ 32 ]. 2-Ethyl-2-(hydroxymethyl)-1,3-propanediol and 5-ethyl-2-decen-4-one are produced by the fatty acids pathway and butanoate metabolism, respectively [ 16 ].…”

Section: Resultsmentioning

confidence: 99%

Identification of Key Volatiles Differentiating Aromatic Rice Cultivars Using an Untargeted Metabolomics Approach

Shi

Zhang

et al. 2021

Metabolites

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Non-aromatic rice is often sold at the price of aromatic rice to increase profits, seriously impairing consumer experience and brand credibility. The assessment of rice varieties origins in terms of their aroma traits is of great interest to protect consumers from fraud. To address this issue, the study identified differentially abundant metabolites between non-aromatic rice varieties and each of the three most popular aromatic rice varieties in the market using an untargeted metabolomics approach. The 656 metabolites of five rice grain varieties were determined by headspace solid-phase extraction gas chromatography-mass spectrometry, and the multivariate analyses were used to identify differences in metabolites among rice varieties. The metabolites most differentially abundant between Daohuaxiang 2 and non-aromatic rice included 2-acetyl-1-pyrroline and acetoin; the metabolites most differentially abundant between Meixiangzhan 2 and non-aromatic rice included acetoin and 2-methyloctylbenzene,; and the metabolites most differentially abundant between Yexiangyoulisi and non-aromatic rice included bicyclo[4.4.0]dec,1-ene-2-isopropyl-5-methyl-9-methylene and 2-methylfuran. Overall, acetoin was the metabolite that was most differentially abundant between the aromatic and non-aromatic rice. This study provides direct evidence of the outstanding advantages of aromatic rice and acts a reference for future rice authentication processes in the marketplace.

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Section: Resultsmentioning

confidence: 99%

Identification of Key Volatiles Differentiating Aromatic Rice Cultivars Using an Untargeted Metabolomics Approach

Shi

Zhang

et al. 2021

Metabolites

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“…Numerous species of the genus Plectranthus are used in traditional medicine to treat ailments due to their content of bioactive compounds, such as diterpenoids and polyphenols that exhibit antibacterial and antifungal properties [3][4][5]. In the case of Plectranthus hadiensis var.…”

Section: Introductionmentioning

confidence: 99%

Improving Foodborne Pathogen Control Using Green Nanosized Emulsions of Plectranthus hadiensis Phytochemicals

Vega-Hernández,

Serrano-Niño,

Velázquez-Carriles

et al. 2023

Colloids and Interfaces

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Every year, millions of foodborne illnesses with thousands of deaths occur worldwide, which is why controlling foodborne pathogens is sought. In this study, nanoemulsions of phytochemicals extracted from Plectranthus hadiensis var. tomentosus (PHT) were obtained, and their antioxidant and antimicrobial capacities were evaluated. PHT extracts were obtained by maceration, ultrasound, and Naviglio methods, and their antimicrobial activity against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Salmonella enterica was determined by the microdilution method. The extract with the highest antimicrobial activity was obtained by Naviglio with a minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 12.5 and 25 mg/mL, respectively, for all bacterial strains. The nanoemulsion (o/w) made with Tween 40, 5% extract, and 50% ultrasonic amplitude had a globule size of 4.4 nm, a polydispersity index of 0.48, and a surface charge of −0.08 mV and remained stable for 30 days. This nanosystem presented significantly higher antimicrobial and antioxidant activity than the free extract. Thus, the nanoencapsulation of the phytochemicals in the PHT extracts is an alternative to protect and enhance their biological activity against pathogenic microorganisms.

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“…β-Caryophyllene is usually determined by gas chromatography (GC) or gas chromatographymass spectrometry (GC-MS) [14][15][16]. However, the preparation of multicomponent plant samples for gas chromatographic analysis is often complex and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Gas chromatography for β-caryophyllene determination in St. John’s wort infused oil

Vičkačkaitė¹,

Petrokaitė²,

Poškus³

2022

chemija

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Hypericum Perforatum L., commonly known as St. John’s wort, is one of the best-known medicinal herbs. St. John’s wort infused oils are mostly used externally, but can be taken orally for stomach ulcers, are used as a food supplement. Therefore, it is important to develop methods that allow a rapid and reliable determination of β-caryophyllene, which is one of the main active components of St. John’s wort. In this work, two gas chromatographic techniques, static headspace gas chromatography (SHS-GC) and solid phase microextraction, combined with gas chromatography-mass spectrometry (SPME-GC-MS), were examined for the determination of β-caryophyllene in St. John’s wort infused oils. A comparison of these two techniques revealed that SPME-GC-MS can be successfully applied for the analysis. The other method, SHS-GC, is simple and fast, but because of its high detection limit, it can only be applied to oil samples with β-caryophyllene concentration higher than 0.1 mg/g.

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An investigation of chemical composition and antimicrobial activity of essential oils extracted from Aeollanthus and Plectranthus species

Cited by 11 publications

References 32 publications

Identification of Key Volatiles Differentiating Aromatic Rice Cultivars Using an Untargeted Metabolomics Approach

Identification of Key Volatiles Differentiating Aromatic Rice Cultivars Using an Untargeted Metabolomics Approach

Improving Foodborne Pathogen Control Using Green Nanosized Emulsions of Plectranthus hadiensis Phytochemicals

Gas chromatography for β-caryophyllene determination in St. John’s wort infused oil

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