Refine your search
Collections
Co-Authors
Journals
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Essia-Ngang, Jean J.
- Chemical Composition and Antibacterial Activities of the Essential Oils of Plectranthus glandulosus and Cinnumomum zeylrrnicum from Cameroon
Abstract Views :200 |
PDF Views:0
Authors
Leopold Jirovetz
1,
Gerhard Buchbauer
1,
Martin B. Ngassoum
2,
Jean J. Essia-Ngang
2,
Leopold N. Tatsadjieu
2,
Ousman Adjoudji
2
Affiliations
1 Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 13, A-1090 Vienna, AT
2 Department of Applied Chemistry, University of Ngaoundere, Ngaoundere, CM
1 Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 13, A-1090 Vienna, AT
2 Department of Applied Chemistry, University of Ngaoundere, Ngaoundere, CM
Source
Scientia Pharmaceutica, Vol 70, No 1 (2002), Pagination: 93-99Abstract
Two aromatic plants have been selected for chemical investigation on account of their antibacterial activities, Plectranthus glandulosus (fresh leaves) and Cinnamomum zeylanicum (dried leaves). P. glandulosus is used as a medicinal plant, while Cinnamomum zeylunicum is used as a common spice in many recipes in Cameroon. The essential oils of the plants have been obtained by hydrodistillation using a Clevenger type apparatus, the yields of oils are about 0.3% and 2.0% respectively. The essential oil of P. glandulosus contains mainly β-thujone (about 31%), p-cymen-8-ol (about 25%) and neral (about 10%) and the essential oil of C. zeylanicum is characterised by a high percentage of eugenol(85%). These essential oils have been tested against three strains of bacteria, namely Pseudomonas,fluorescens. Escherichia coli and Staphylococcus aureus; qualitative tests (diffusion through solid medium) and quantitative tests (dilution method) have been carried out. P. fluorescens shows a higher resistance to the two oils (MIC values not less than 5000 ppm). E. coli is more sensitive to these oils, while against S. aureus the essential oil of C. zeylanicum still shows a high activity (3500 ppm). The antibacterial activities of the essential oils could be attributed to the components eugenol as the active component of C. zeylanicum and β-thujone and p-cymen-4-ol of the essential oil of P. glandulosus.Keywords
Plectranthus glandulosus; Cinnamomum zeylanicum; Essential Oils; Antibacterial Activity, Composition.References
- Amvam Zollo, P.H.. Biyitti, L, Tchoumbounang. F. Menut, C., Lamaty. G., Bouchet. P. 1998. Aromatic Plants of Tropical Central Africa. Part XXXII. Chemical Composition and Antifungal Activity of Thirteen Essential Oils from Aromatic Plants of Cameroon. Flav. Flagr. J. 13. 107-114.
- Baratta. M.T., Dorman. H.J.D., Deans. S.G., Figueiredo, A.C., Barroso J.G., Ruberto. G. 1998. Antimicrobial and antioxidant properties of some commercial oils. Flav. Fragr. J. 13. 735-244.
- Davies, N.W., 1990. Gas Chromatographic Retention Indices of Monoterpenes and Sesquiterpenes on Methyl Silicone and Carbowax 20M Phases. J. Chromatogr. 503. 1-24.
- Dupriez, H., De Leener, P., 1987. Jardins et vergers d'Afrique. Apica, Enda, CTA, Wageningen. Collection Terres et vie. 354 p.
- Formacek, V., Kubeczka, K.-H., 1982. Essential Oils Analysis by Capillary Gas Chromatography and Carbon-13-NMR Spectroscopy. J. Wiley & Sons, Chichester, 87.
- Hughes, B.G., Lawson, L.D., 1991. Antimicrobial action of some essentials oils, Phytother. Res. 5. 154-158.
- Institut Pasteur, 1980. Lilieux et reactif de laboratoire. Pasteur edition, Paris, pp. 159-166.
- Jennings. W., Shibamoto, T., 1980. Qualitative Analysis of Flavour and Fragrance Volatiles by Glass Capillary Gas Chromatography. Academic Press, New York.
- Jirovetz, L., Buchbauer, G., Ngassoum, M.B., 1997. GC-MS-analysis of essential oils from Cameroonian plants used as spices in local foodstuff. Recent Res. Devel. in Agricultural and Food Chem. 1, 241-255.
- Jirovetz, L., Buchbauer, G., Ngassoum M.B., Eberhardt, R., 1998. Analysis and Quality Control of the Essential Oil of the Leaves of Cinnamomum zeylanicum L, from Cameroon. Ernahrung/Nutrition, 22(10), 446-445.
- Joulain, D., Konig, W.A., 1998. The Atlas of Spectral Data of Sesquiterpene Hydrocarbons. E.B. Verlag, Hamburg.
- Kondjoya, N., Berdague, J.-L. 1996. A Compilation of Relative Retention Indices for the Analysis of Aromatic Compounds. Edition du Laboratoire Flaveur, Saint Genes Champelle.
- Ngassoum, M.B., Jirovetz, L., Buchbauer, G., Fleischhacker, W., 2001. Investigation of Essential Oils of Plectranthus glandulosus Hook f. (Lamiaceae) from Cameroon. J. Essent. Oil Res. 13, 73-75.
- Tudor, E.. 1997. Temperature dependence of retention index for perfumery compounds on a SF-30 glass capillary column I. Linear correlation. J. Chromatogr. 779, 287-297.
- Watt, J.M., Breyer-Brandwijk, M.G. 1962. The medicinal and the poisonous plants of Southern and Eastern Africa. 2nd edn., Livingstone, London: p. 524-525.