Chemical Composition, Antimicrobial Activities And Odor Descriptions Of Some Essential Oils With Characteristic Floral-rosy Scent And Of Their Principal Aroma Compounds

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Recent Res. Devel. Agronomy & Horticulture, 2(2006). - 12 p.
The principal aroma compounds (PACs) rose oxides, geraniol, nerol and citronellol as well as some of their derivatives and the composition of these PACs in various essentials oil with floral-rosy scent (citronella, 3 samples of geranium, Helichrysum, palmarosa, rose and Verbena) were analyzed by GC and GC/MS. Twentyone principal aroma compounds were identified in addition to further more than 50 constituents of all samples. As main PACs (concentration higher than 3%, calculated as %-peak area) in the essential oils, citronellal (in the citronella sample), citronellol (in the citronella, the 3 geranium and the rose samples), geraniol (in the citronella, the 3 geranium, the palmarosa and the rose samples), citronellyl formate (in the 3 geranium samples), geranyl formate (in 2 geranium samples), nerol (in the Helichrysum and rose samples), geranyl acetate (in the palmarosa sample), neryl acetate (in the Helichrysum sample), neryl propionate (in the Helichrysum sample), neral (in the Verbena sample) and geranial (in the Verbena sample) were found. These analytical results were correlated with olfactoric evaluations for reasons of quality control of the aroma compounds and essential oils. Furthermore, all essential oils and the aroma components, a phenolic reference compound and three classic antibiotics were tested against several microorganisms to get informations about the antimicrobial effects of each essential oil. Most of the PACs and the essential oils show medium up to high antimicrobial activities against various gram-(+)- and gram-(-)-bacteria as well as against the yeast Candida albicans.
<strong>Introduction. <strong>Materials and methods. <em>Samples and reference compounds. GC analysis. GC-MS analysis. Antimicrobial testings. Olfactoric evaluations. <strong>Results and discussions. <strong>Acknowledgement. <strong>References.

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Research Signpost 37/661 (2), Fort P.O., Trivandrum-695 023, Kerala, India Recent Res. Devel. Agronomy & Horticulture, 2(2006): 1-12 ISBN: 81-308-0054-3 1 Chemical composition, antimicrobial activities and odor descriptions of some essential oils with characteristic floral-rosy scent and of their principal aroma compounds Leopold Jirovetz1, Gernot Eller1, Gerhard Buchbauer1, Erich Schmidt2 Zapriana Denkova3, Albena S. Stoyanova3, Radosveta Nikolova3 and Margit Geissler4 1 University of Vienna, Department of Clinical Pharmacy and Diagnostics Althanstrasse 14, A-1090 Vienna, Austria; 2Kurt Kitzing Co., Hinterm Alten Schloss, D-86757 Wallerstein, Germany; 3University of Food Technologies Department of Essential Oils, 26 Maritza Boulevard, 4002 Plovdiv, Bulgaria 4 SHIMADZU-Germany, Department of GC and GC-MS, Albert-Hahn-Strasse 6-10, D-47269 Duisburg, Germany Summary The principal aroma compounds (PACs) rose oxides, geraniol, nerol and citronellol as well as some of their derivatives and the composition of these PACs in various essentials oil with floral-rosy scent (citronella, Correspondence/Reprint request: Dr. Leopold Jirovetz, University of Vienna, Department of Clinical Pharmacy and Diagnostics, Althanstrasse 14, A-1090 Vienna, Austria. E-mail: [email protected] 2 Leopold Jirovetz et al. 3 samples of geranium, Helichrysum, palmarosa, rose and Verbena) were analyzed by GC and GC/MS. Twentyone principal aroma compounds were identified in addition to further more than 50 constituents of all samples. As main PACs (concentration higher than 3%, calculated as %-peak area) in the essential oils, citronellal (in the citronella sample), citronellol (
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