02270nas a2200277   4500008004100000245019400041210006900235260026900304300001400573490000700587520106300594653002501657653001801682653002301700653000701723653003001730653003001760653001601790653000801806100001701814700001601831700002201847700001201869700001401881856009701895       2004                        eng d00aCharacterization and TLC - Bioautographic detection of essential oils from sone Thymus taxa. Determination of the activity of the oils and their components against plant pathogenic bacteria0 aCharacterization and TLC Bioautographic detection of essential o  aAffiliation: Department of Botany, Faculty of Natural Sciences, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary; Affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Semmelweis University, Ülloi út 26, H-1085 Budapest, Hunc2004///  a300 - 3040 v173 aThe chemical composition of the oils of four thyme (Lamiaceae) chemotypes (Thymus vulgaris L., Thymus serpyllum L., Thymus × citriodorus (Pers.) Schreb., and Thymus × citriodorus " Archer's Gold") has been determined by gas chromatography (GC). Thymol was the main component of the oils of Thymus vulgaris and Thymus serpyllum, geraniol was the main component of the oil of Thymus × citriodorus, and carvacrol was the main component of the oil of Thymus × citriodorus "Archer's Gold". The bioactivity of the volatile oil of Thymus vulgaris and of the three main components of the oils against Gram negative plant pathogenic bacteria was examined by direct bioautography. They had an inhibitory effect on all of the test microorganisms. Two bacterial strains (Xanthomonas campestris pv. vesicatoria and Pseudomonas syringae pv. phaseolicola) were most sensitive in the bioautographic system and use of these bacteria would considerably shorten the process of bioautographic detection. The two antibiotics gentamycin and streptomycin were used as controls.10aDirect bioautography10aEssential oil10aGas chromatography10aGC10aPlant pathogenic bacteria10aThin layer chromatography10aThymus taxa10aTLC1 aHorváth, G1 aSzabó, Gy1 aLemberkovics, É1 aBotz, L1 aKocsis, B  uhttp://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-4644329612&partnerID=40&rel=R6.5.002181nas a2200241   4500008004100000245012800041210007000169260013000239300001400369490000700383520126200390653001901652653000701671653001001678653001401688653004901702100002101751700001701772700001901789700001801808700001601826856009701842       2001                        eng d00aEssential oil composition of Thymus lotocephallus G. López & R. Morales, collected during flowering and vegetative phases0 aEssential oil composition of Thymus lotocephallus G López R Mor  aAffiliation: Centro de Biotecnologia Vegetal, Dep. de Biologia Vegetal, FCL, Campo Grande, 1749-016 Lisbon, Portugalc2001///  a417 - 4210 v163 aThe aerial parts of Thymus lotocephalus were collected during the flowering and vegetative phases of the plant in the Algarve, Portugal. The oils were isolated by hydrodistillation and distillation-extraction and analysed by GC and GC-MS. The oil isolated from the flowers was obtained in a yield of 0.9%, whereas those isolated from the leaves during flowering and vegetative phases showed lower yields, 0.7% and 0.2% (v/w), respectively. The oils isolated from both the flowers and the leaves were dominated by the oxygen-containing monoterpenes (57-64%). The monoterpene hydrocarbons (11-22%) and the oxygen-containing sesquiterpenes (7-14%) were the two other main fractions of these oils. 1,8-Cineole (10-19%), linalyl acetate (6-14%) and linalol (4-12%) were the main components of all the oils studied. Intermedeol (2-4%), beta -caryophyllene oxide (2-3%) and viridiflorol (1-3%) were the main components of the oxygen-containing sesquiterpene fraction. The diterpene abietatriene was present in trace amounts (<0.05%) in all the oils. Depending on the plant part studied and on the isolation procedure used, these oils can be characterized either by 1,8-cineole/linalol/linalyl acetate or 1,8-cineole type. Copyright (C) 2001 John Wiley & Sons, Ltd.10aEssential oils10aGC10aGC-MS10aLamiaceae10aThymus lotocephallus G. López & R. Morales1 aFigueiredo, A, C1 aMiguel, M, G1 aDuarte, A, M F1 aBarroso, J, G1 aPedro, L, G  uhttp://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0035182964&partnerID=40&rel=R6.5.0