摘要:

From 1960 to 1989 more than 80Thymustaxa from 27 different countries all over the world have been investigated for the composition of their essential oils. About 200 different compounds, mostly terpenes, have been identified. The terpene phenols thymol and carvacrol represent the most important compounds in the genus, followed by linalool, p-cymene, γ-terpinene, borneol, terpinen-4-ol and 1, 8-cineole. This paper lists the main components of the essential oils of all the taxa investigated from 1960 to 1989. In addition, seasonal variations ofThymusoils and essential oil polymorphism within the genusThymusare also reported.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697915

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

GC/MS analyses on polar and apolar columns of an aromatic extract of the fruit of Jamrosa-tree from Reunion allowed the identification of 80 volatile compounds: 12 hydrocarbons, 8 oxides and acetals, 12 aldehydes, 9 ketones, 5 esters, 31 alcohols, 3 acids. The presence of a few furan derivatives (unsaturated γ-lactones) is suspected. Among the identified compounds, geraniol, nerol, β-phenylethyl alcohol, linalool, hotrienol, citronellol, four linalool oxides (furans and pyrans), rose oxides and nerol oxide are well-known components of the Bulgarian rose oil. Other compounds, such as, (E)- and (Z)-cinnamaldehydes and their corresponding alcohols and acetates, 3-phenylpropyl alcohol and 3-phenyl propanal are responsible for the cinnamon-spicy-like note of this exotic fruit.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697916

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The essential oil profiles of some common scented geraniums were investigated using GC/M S. These include the followingPelargoniumspecies and cultivars in the family Geraniaceae:P. graveolens, L'Hérit.,P. radensH. E. Moore,P. capitatum(L.) L'Hérit. ex Aiton,P. tomentosumjacq., ‘Mabel Grey’, ‘Frensham’, ‘Citronella’, ‘Rober's Lemon Rose’, ‘Camphor Rose’ and ‘Godfrey's Pride’. There was a strong correlation between the odor of the main essential oil components and that of the overall odor of thePelargoniumstudied. There was also a correlation between the essential oil profile of the hybrids and that of parents, indicating its potential taxonomic viability. This indicates that a hybridization program could be suggested by the essential oil profiles of different species in order to produce a commercially viable hybrid for the perfumery or food industry. Variations are found when the present data are compared with the published data. These could be due to the proliferation of hybrid and cultivar misnomers which leads to a confusion between species and hybrids, the use of different hybrids of the same species or the existence of infraspecific chemical differences.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697917

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The essential oil, which was obtained by steam distillation from two qualities of mastic gum, was subjected to analysis by GC and GC/MS. It was found that the oil contained 62 constituents, 61 of which were identified. The main components were α-pinene (58.86–77.10%), camphene (0.75–1.04%), β-pinene (1.26–2.46%), myrcene (0.23–12.27%), linalool (0.45–3.71%), and β-caryophyllene (0.70–1.47%). These six components total more than 90% of the oil. Some qualitative and quantitative differences were found between the two oils.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697918

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Callus and suspension cultures ofMelissa officinaliscould not accumulate detectable amounts of volatile constituents typical of the intact plant when maintained under varying cultural conditions. Non-terpenoid constituents, especially furfural, hexanoic and octanoic acids, were accumulated by the callus tissues. Similar accumulation was observed for the suspended cells in addition to other minor products which were both released into the liquid medium. The petrol extract of the cultures yielded predominantly C14H30to C17H36alkanes and β-sitosterol.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697919

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The essential oil ofEupatorium stoechadosmumHance from Vietnam was analyzed by GC/MS. The main constituents were found to be thymohydroquinone dimethyl ether (confirmed by1H-NMR, 73.6%), and β-caryophyllene (8.9%), accounting for more than 82% of the oil. Selina-4, 11-diene (11.0%) was also tentatively identified as a major component of this oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697920

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The leaf oil ofEucalyptus camaldulensiswas produced from both freshly harvested leaves and those air-dried for one week in yields of 1.04% and 1.70% respectively. Seventeen compounds were identified by GC/MS analysis, the major compounds being 1, 8-cineole (45.00–49.9%) and p-cymene (33.8–34.9%). Air drying was found to result in an increase in oil yield without any modification of composition.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697921

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Of the fifteen components identified by GC and GC/MS in the volatile leaf oil of lime(Citrus aurantifolia)from Nigeria, only limonene, geranial, nerol and β-pinene were found in substantial amounts. The volatile oil was obtained from the leaves by means of hydrodistillation.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697922

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Forty-five constituents were identified in the essential oil ofOriganum syriacum(Za'atar) growing in Israel and Mt. Sinai, Egypt. The oils of thymol and carvacrol chemovarieties from Israel are qualitatively similar, while the carvacrol variety found on Mt. Sinai is noticeably different due to the presence of geraniol, geranyl esters and ethyl cinnamate.

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697923

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Eighteen compounds have been characterized by GC/MS and relative retention times in an oil ofCalamintha arkansana.The major compounds are pulegone (63.42%) and menthone (16.83%).

ISSN:1041-2905    

DOI:10.1080/10412905.1991.9697924

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor