| 1. |
- El-Seedi, Hesham R., et al.
(författare)
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Essential oil analysis of Micromeria nubigena HBK and its antimicrobial activity
- 2008
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Ingår i: The journal of essential oil research. - 1041-2905 .- 2163-8152. ; 20:5, s. 452-456
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Tidskriftsartikel (refereegranskat)abstract
- Water-distilled essential oil from leaves and flowers of Micromeria nubigena H.B.K. (Lamiaceae) were analyzed by GC and GUMS systems. The major components identified were thymol (36.9%), carvacrol (16.7%), pulegone (10.8%), caryophyllene oxide (4.6%) and (E)-phytol (3.2%). The major volatiles released by beta P-glucosidase treatment of the aqueous plant residue were (Z)-3-hexenol (31.2%), (4-2-hexenol (18.3%) and delta-cadinene (3.4%). The oil showed significant antibacterial activity against Staphylococcus aureus, Escherichia coli, Klebsiella pneumonia, and Pseudomonas aeruginosa, and antifungal activity against Candida albicans, Botrytis cinerea and Aspergillus niger, while the beta-glucosidase-liberated fraction was inactive.
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| 2. |
- Pagula, F P, et al.
(författare)
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Studies on essential oil-bearing plants from Mozambique : Part II. Volatile leaf oil of needles of Pinus elliottii Engelm. and Pinus taeda L.
- 2006
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Ingår i: The journal of essential oil research. - : Informa UK Limited. - 1041-2905 .- 2163-8152. ; 18:1, s. 32-34
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Tidskriftsartikel (refereegranskat)abstract
- Essential oil composition of fresh needles from Pinus elliottii (slash pine) and Pinus taeda L. (loblolly pine) grown in Mozambique were investigated by a combination of GC and GC/M S. The present investigation revealed the following composition of P elliottii and P. taeda: tricyclene (2.1% and 3.8%), alpha-pinene (43.0% and 62.3%), beta-pinene (27.1% and 7.1%), limonene (2.9% and 2.0%), myrcene (2.3% and 1.8%) and beta-phellandrene (1.1% and 3.7%), respectively. Among the oxygenated monoterpenes present, the most significant was alpha-terpineol (9.6% and 2.3%, respectively). Expected regional variability on the chemical composition of the corresponding tree species was examined.
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| 3. |
- Ráice, Rui, et al.
(författare)
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Characterization of volatile components extracted from Vangueria infausta (African medlar) by using GC-MS
- 2015
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Ingår i: The Journal of Essential Oil Research. - : Informa UK Limited. - 1041-2905 .- 2163-8152. ; 27:1, s. 76-81
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Tidskriftsartikel (refereegranskat)abstract
- Volatile compounds isolated from the African medlar (Vangueria infausta L.) were identified by gas chromatography and gas chromatography-mass spectrometry. The volatile components identified in the extract were: hexanoic acid (5600 mu g/g, dry matter, DM), octanoic acid (240 mu g/g, DM), methyl hexanoate (15 mu g/g, DM), ethyl hexanoate (44 mu g/g, DM), methyl octanoate (12 mu g/g, DM) and ethyl octanoate (13 mu g/g, DM). The principal aroma from the V.infausta fruit originates from ethyl hexanoate and ethyl octanoate with a minor contribution from methyl hexanoate and methyl octanoate.
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