摘要:

AbstractThe enantiomers of α‐pinene, β‐pinene and limonene were directly determined in essential oils used for the preparation of alcoholic beverages and seasonings. The essential oils were analysed by multidimensional gas chromatography using a non‐chiral‐chiral column combination with modified β‐cyclodextrin as the chiral stationary phase, without a previous sample clean up. Such analyses may allow a differentiation of herb, root and seed oils isolated from the same p

ISSN:0882-5734    

DOI:10.1002/ffj.2730060202

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractS‐Prenyl thioesters have been identified in the essential oils of a further two Diosmeae species. The oils fromAgathosma rosmarinifolia(Bartl.) Williams andEmpleurum fragransGlover have been examined by capillary GC and GC‐MS. Since the previous published work on the composition of the sulphur‐containing oils fromAgathosma apiculataG. F. W. Mey,A. clavisepalaR. A. Dyer,A. puberulaFourcade andPhyllosma capensisBolus was incomplete, further studies of these oils have been under

ISSN:0882-5734    

DOI:10.1002/ffj.2730060203

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractThe essential oils of fresh flowers and a combination of leaves plus stems of flowering and non‐floweringAgeratum conyzoidesL. growing in two different climatic conditions were analysed by gas‐liquid chromatography and mass spectrometry. The composition of the oils of the flowers and the combination of the leaves plus stems were similar except for quantitative variations. The oils are rich in sesquiterpenes and ageratochromene (6,7‐dimethoxy‐2,2‐dimethylchromene) and 7‐methoxy‐2,2‐d

ISSN:0882-5734    

DOI:10.1002/ffj.2730060204

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractGas chromatographic analysis of the essential oil ofCrithmum maritimumL. showed the presence of at least 57 compounds representingca. 95% of the total oil. The main components were limonene (22.3%), γ‐terpinene (22.9%) and thymol methyl ether (25.5%). Compounds were identified through their GC retention times and MS data. The identification of thymol methyl ether was confirmed by NMR spectrosco

ISSN:0882-5734    

DOI:10.1002/ffj.2730060205

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractSteam distillation ofDysoxylum richii(A. Gray) C.D.C. fruits gave a greenish coloured oil in 0.19% yield whileSynedrella nodiflora(L.) Gaertn. leaves gave a yellow oil in 0.02 % yield. The composition of the essential oils was determined by the use of capillary gas‐liquid chromatography and mass spectrometry. The oil fromDysoxylum richiifruits was found to be rich in sesquiterpene hydrocarbons (58 %) and oxygenated sesquiterpenes (35 %). The major components of the oil are δ‐cadinene (20.4%), germacrene‐D (16.6%) and cadinol isomers (21%). The classes of compounds detected in the leaf oil ofSynedrella nodiflorawere aliphatic alcohols, monoterpenes, sesquiterpene hydrocarbons and oxygenated sesquiterpenes. The major components of this oil are β‐caryophyllene, β‐farnesene, germacrene‐D

ISSN:0882-5734    

DOI:10.1002/ffj.2730060206

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractPeaks characteristic of 1,8‐cineole consistently appeared in spectra obtained by multiple internal reflectance spectroscopy (MIR) from the surfaces of 1,8‐cineole‐richEucalyptus camaldulensisDehnh. leaves. The absorbances derived from the peaks at wave numbers of 1050 and 1078 cm−1were well correlated (r2= 0.87 and 0.91 respectively) with the 1,8‐cineole yield of leaves from trees in the field known to have high, medium and low yields of this compound. Absorbances at these wave numbers were not recorded in spectra from a contrasting cineole‐poor chemotype of high sesquiterpene content. The wave pattern of this chemotype was readily distinguishable from the pattern of the regular, 1,8‐cineole‐rich phenotype. Multiple internal reflectance spectroscopy may be useful for field‐testing eucalypts for their potential 1,8

ISSN:0882-5734    

DOI:10.1002/ffj.2730060207

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractStudies on the extraction of jasmine concrete with liquid carbon dioxide has shown that artefact‐free and solvent‐residue‐free jasmine oil can be obtained. The jasmine oil thus obtained had a natural aroma, golden yellow colour and good storage

ISSN:0882-5734    

DOI:10.1002/ffj.2730060208

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractThe composition of hydro‐distilled essential oils of the leaves of threeMelaleucaspecies growing in Egypt, viz.,M. quinquenervia(Cav.) S. T. Blake,M. armillarisSm. andM. bracteataF. Muell was determined by GC‐MS. Methyl eugenol is the main component ofM. bracteata(97.7%). 1,8‐Cineole constitutes 57.2% of the oil ofM. quinquenerviaand 33.7 % ofM armillaris. Terpinen‐4‐ol amounts to 24.8 % inM. armillaris. Accordingly, the oils of these plants may be considered of economic i

ISSN:0882-5734    

DOI:10.1002/ffj.2730060209

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

ISSN:0882-5734    

DOI:10.1002/ffj.2730060210

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY

摘要:

AbstractNew sulphur compounds in Bulgarian rose essential oil were investigated as follows: the steam distilled oil of the rose petals was fractionated by distillation, column chromatography and high‐performance liquid chromatography. GC and GS‐MS were employed for identification.In this analysis, 16 sulphur compounds were identified, andn‐butyl methyl disulphide, dimethyl trisulphide,n‐hexyl methyl disulphide, 3‐(4‐methylpent‐3‐enyl)thiophene, 3‐methyl‐2‐(3‐methylbut‐2‐enyl)thiophene, 3‐(4,8‐dimethyl‐nona‐3,7‐dienyl)thiophene, α‐mintsulphide, 4‐(4‐methylpent‐3‐enyl)‐1,2‐dithiacyclohex‐4‐ene, 1,2‐epithiohumulene, 4,5‐epithiohumulene and 4,5‐epithiocaryophyllene were identified for the first time in rose oil. These compounds were found

ISSN:0882-5734    

DOI:10.1002/ffj.2730060211

出版商:John Wiley&Sons, Ltd.    

年代:1991

数据来源: WILEY