Volatile leaf oil constituents of three Eucalyptus species from Nigeria

Oyedeji, Adebola O.; Olawore, Olayide N.; Ekundayo, Olusegun; Koenig, W. A.

doi:10.1002/(sici)1099-1026(199907/08)14:4<241::aid-ffj820>3.3.co;2-p

Cited by 9 publications

(12 citation statements)

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“…Essential oil yields, calculated with respect to the mass of dry plant material, are between 2.41 and 4.35%. These results differ from those in the literature which vary between 0.221.2% [14,[16][17][18]25]. Thus, our results are promising for a subsequent valuation.…”

Section: Chemical Composition Of Essential Oilscontrasting

confidence: 97%

The Essential oil of Eucalyptus alba L. Growing on the Salt Zone of Fatick (Senegal) as a Source of 1,8Cineole and Their Antibacterial Activity

Tine

Diallo

Diop

et al. 2020

J. Drug Delivery Ther.

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Members of the genus Eucalyptus are potential sources of number of commercial essential oils and aromachemicals. In present study, the essential oils isolated by hydrodistillation from the leaves of Eucalyptus alba were analyzed by GC-FID and GC-MS. Essential oil yields ranged from 2.41 to 4.35%. In total 18 constituents were identified, accounting for 99.0 to 99.7% of the total compositions. 1,8-cineole was present in all samples as the major component (76.5-88.1%). In addition to this compound, others that were found including limonene (3.8–8.6%), α-terpineol (1.4–2.8%), globulol (1.3–6.3%) and α-pinene (1.5–1.8%). The essential oil showed a strong antibacterial activity against S. aureus ATCC 29213 which is translated by an MIC of 1.25 mg/mL and good activity against E. coli ATCC 25922 (6.25 mg/mL) and E. faecalis ATCC 29212 (6.25 mg/mL). To our knowledge, our study is the first report of E. alba essential oils characterized by a high 1,8-cineole content (>76.5%). They may have potential applications in food and pharmaceutical products. Keywords: Eucalyptus alba, essential oils, antibacterial activity, 1,8-cineole and GC-SM

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Section: Chemical Composition Of Essential Oilscontrasting

confidence: 97%

The Essential oil of Eucalyptus alba L. Growing on the Salt Zone of Fatick (Senegal) as a Source of 1,8Cineole and Their Antibacterial Activity

Tine

Diallo

Diop

et al. 2020

J. Drug Delivery Ther.

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“…The comparative study of our results to those obtained by other researchers showed that E. citriodora grown in Choucha arboreta (Tunisia) is much richer in essential oil than those obtained from Australia, Uruguay, Congo, Morocco, Algeria and Tunisia (Zerniza arboreta) with an essential oil yield inferior to 3.3±0.1 %. E. alba leaves were also richer in essential oils than those obtained from Nigeria (0.28 %), Congo (0.22 %), Burkinafaso (1.2 %), Bangladesh (0.85 %), and Senegal (0.6–0.9 %) . Compared to our findings, the leaves of E. paniculata harvested from Uruguay, Morocco and Brazil were relatively poor in essential oils yields (0.23, 0.1 and 0.6 %).…”

Section: Resultsmentioning

confidence: 85%

Chemical Characterization of Five TunisianEucalyptusEssential Oils Species

Elaissi

Moumni

Roeleveld

et al. 2019

Chemistry & Biodiversity

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Hydrodistillation of the dried leaves of five Eucalyptus species, E. alba REINW. ex BLUME, E. citriodora HOOK., E. paniculata SM., harvested from Choucha arboreta (region of Sejnane, northwest of Tunisia), E. pimpiniana MAIDEN from Mjez Elbab arboreta (north east of Tunisia) and E. bicolor A.CUNN ex HOOK from Sidi Smail arboreta (center of Tunisia), in March 2017, afforded essential oils in yields varying from 1.3 � 0.2 to 6.0 � 0.9 % according to the species. E. citriodora provided the highest mean percentage of essential oil amongst all the species. Analysis by GC (RI) and GC/MS allowed the identification of 138 components representing 84.6 -98.7 % of the total oil. The content of the different samples varied according to the species. The main components were citronellol, followed by 1, 8-cineole, α-pinene, τ-cadinol, 7-epi-α-eudesmol, trans-pinocarveol, spathulenol, aromadendrene, γ-cadinene and δ-cadinene. The principal components and the hierarchical cluster analyses separated the five leaf essential oils into three groups, each group constituted a chemotype.

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“…The major constituent being found was 1,8-Cineole (25.64%) while α-terpeneol, α-asarone, Borneol and γ-Gurjunene were found to be 11.11, 10.26, 7.69 and 6.84%, respectively. Because of the high content of oxygenated mono and sesquiterpenoids, the oil may be classified as a 'medicinal type' (Oyedeji et al 1992). It seems interesting that EO showed promising antioxidant activities although it contains major constituents, i.e.…”

Section: Gc-ms Analysis Of Eomentioning

confidence: 94%

Antioxidant, cholinesterase inhibition activities and essential oil analysis of Nelumbo nucifera seeds

Khan

Ali

et al. 2015

Natural Product Research

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Nelumbo nucifera seeds' essential oil (EO), crude extract and subsequent fractions were evaluated for their DPPH, ABTS and superoxide anion-free radical scavenging and cholinesterase inhibitory activities. The ethyl acetate fraction and EO showed outstanding antioxidant activities with IC50 values of 191, 450 μg/mL (DPPH), 123, 221 μg/mL (ABTS) and 69, 370 μg/mL (superoxide anion). The ethyl acetate fraction and EO also caused significant inhibition of acetylcholinesterase and butyrylcholinesterase with IC50 values of 70 ± 0.6, 64 ± 0.8 and 75 ± 0.3, 58 ± 0.2, in dose-dependent manner. The first ever gas chromatography-mass spectrometry analysis of the EO obtained from N. nucifera seeds resulted in identification of 19 constituents, mainly comprised of oxygenated sesquiterpenes responsible for their promising bioactivity. The crude and fractions revealed the presence of saponins, flavonoids, steroids, alkaloids, terpenoids and cardiac glycosides in phytochemical investigation.

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Volatile leaf oil constituents of three Eucalyptus species from Nigeria

Cited by 9 publications

References 0 publications

The Essential oil of Eucalyptus alba L. Growing on the Salt Zone of Fatick (Senegal) as a Source of 1,8Cineole and Their Antibacterial Activity

The Essential oil of Eucalyptus alba L. Growing on the Salt Zone of Fatick (Senegal) as a Source of 1,8Cineole and Their Antibacterial Activity

Chemical Characterization of Five TunisianEucalyptusEssential Oils Species

Antioxidant, cholinesterase inhibition activities and essential oil analysis of Nelumbo nucifera seeds

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