Publications

Publications serve as the concrete art form for the scientist. It is his modus operandi. Authorship is akin to success and achievement. It cannot and should not deteriorate into a bargaining tool or commodity. Dardik
Van Vuuren, S.F., Docrat, Y., Kamatou, G.P.P., Viljoen, A.M. 2014. Essential oil composition and antimicrobial interactions of understudied tea tree species. South African Journal of Botany 92: 7–14.
The essential oil composition of three Myrtaceous species (Leptospermum petersonii, L. scoparium and Kunzea ericoides) belonging to the tea tree group were analysed using gas chromatography coupled to mass spectrometry (GC-MS). The major compounds determined from the mean ± SD of the monthly samples collected for one calendar year in L. petersonii are citronellal (11.4±4.3%), citronellol (17.5±7.1%), neral (19.7±1.6%) and geranial (34.7±3.3%). The major compounds in L. scoparium are eudesma-4(14)-11-diene(11.6±2.4%), α-selinene(10.4±2.3%) and (E)-methyl cinnamate (12.6±3.8%). The major compounds in K. ericoides are α-pinene (37.6±6.3%) and p-cymene (13.5±4.1%). The essential oils show some promising antimicrobial activity against selected micro-organisms when investigated using the minimum inhibitory concentration assay. Highest sensitivities were noted for the Brevibacteria (lowest MIC value of 0.06 mg/ml), a genus associated with foot odour. When the different essential oils were combined in various ratios and tested againstStaphylococcus aureus, Pseudomonas aeruginosa and Candida albicans, a predominantly additive effect was noted.




Tea tree flower - TUT, Pretoria, Gauteng, South Africa [2010 © alvaroviljoen.com]