摘要:

The oil and extract composition of two Bulgarian cultivars ofMentha piperitaL., obtained by hydrodistillation and dichloromethane extraction, respectively, were analyzed by GC/MS. The oil yield from ‘Zefir’ was 0.97% and that from ‘Kliment-63’ was 0.54%. The oil from ‘Zefir’ was found to be rich in menthol (46.2–50.2%) and menthyl acetate (16.8–22.5%). In the oil from ‘Kliment-63,’ the content of these components was lower, while the menthone content was higher (20.0–23.1%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699560

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The oil obtained fromOriganum vulgareL. ssp.vulgarewas examined by GC and GC/MS. Eleven compounds were identified of which γ-muurolene (62.04%) was found to be the major constituent.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699561

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The essential oil from fresh leaves ofPiper cernumVeil. var.cernumYuncker from Rio de Janeiro, Brazil was isolated by hydrodistillation and analyzed through a combination of GC and GC/MS. Compounds representing 92.9% of the oil volatiles were identified. Twenty six constituents were identified according to their retention indices and mass spectra. The major constituents of the oil werecis-dihydroagarofuran (32.3 %), α-pinene (10.2 %), β-pinene (7.4 %), 10-epi-γ-eudesmol (7.1 %) and elemol (6.7 %).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699562

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Naturally occurringBackhousia anisatawas surveyed within the Bellinger Valley of eastern Australia, the only region where it is known to be endemic. During the course of the survey, 26 sites were located. Ten of these were chosen for further study. The geography and climate of each site was assessed and the basic soil chemistry determined. A total of 44 trees from the ten sites were then selected to define the growth characteristics and chemical composition of individual trees. Leaf samples were extracted with ethanol to determine (E)-anethole and methyl chavicol percentages. Leaf from selected trees was also steam distilled for determination of oil yield and oil quality for comparison with other anethole and methyl chavicol rich oils. The chemical composition and physical constants of the anethole-rich oils when compared with those of other commercial sources, suggest thatB. anisataprovides an excellent alternative source for the (E)-anethole rich aniseed, star anise and fennel oils. These results better define the natural distribution of theBackhousiasource of (E)-anethole and methyl chavicol and attempt to match distribution with the physical, climatic, geographic, growth, chemical characteristics and flavor and fragrance potential of each chemotype.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699563

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The aerial parts of wildStachys rectaL., Lamiaceae, collected in the vicinity of Nis (Southern Serbia) during the full blooming stage, contained only 0.014% of essential oil. Using GC and GC/MS, 32 components were identified, predominantly alcohols and adequate oxides. The major constituent was 1-octen-3-ol (19.7%). The other important components were caryophyllene oxide, humulene oxide and nerolidol, but present in significantly lower amounts (4.6%, 3.8% and 3.6%, respectively).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699564

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The composition of the essential oilsof Nepeta denudate Benth.andN. cephalotesBoiss., which are endemic to Iran, was investigated by means of GC, GC/MS and1H-NMR spectra of the main compounds, 1,8-cineole (48.0%), myrtenol (5.0%), β-pinene (4.6%) and trans-pinocarveol (4.5%) were the main components among the 21 constituents characterized in the oil ofN. denudata, representing 85.7% of the total components detected. Ten compounds were identified in the oil ofN. cephalotesrepresenting 78.5% of the total oil with 4aα, 7α, 7aα-nepetalactone (35.1%), β-pinene (18.2%) and 1,8-cineole (11.4%) as the major constituents. The structure of 1,8-cineole, nepetalactone and β-pinene were confirmed by their1H-NMR spectra.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699565

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

MenthaxpiperitaL., and five otherMenthaspecies of mint were grown in Northern Finland at the North Ostrobothnia Research Station of the Agricultural Research Center at latitude 64°40′N and 25°05′E. To investigate the influence of harvest dates on the oil composition, leaves were collected at an early flowering stage (50% of buds) (I) and when 30% were in full bloom (II). Different harvesting times did not greatly affect the percentage of the main components for any of the mints. At this stage of plant development, young leaves contained more menthone than menthol, and apparently the amount of menthol had only started to increase. Also the relative percentages for menthofuran and pulegone were low in the leaves. The compositional studies were performed by GC/MS on solvent extracts of the leaves.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699566

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The chemical composition of the essential oils obtained from the leaves ofEucalyptus camaldulensisDehnh.,E. citriodoraHook.,E. dalrympleanaMaiden,E. deaneiMaiden,E. delegatensisR. Baker,E. globulusLabill,E. grandis W.Hill ex Maiden,E. nitens(Deane et Maiden) Maiden,E. salignaSmith,E. tereticornisSmith,E. urophyllaS.T. Wake andE. vtminalisLabill, growing in Ethiopia were examined by capillary GC and GC/MS. The oil ofE. camaldulensiswas found to contain β-phellandrene (18.9%) and p-cymene (17.8%) while the oil ofE. citriodorawas rich in citronellal (73.3%) and citronellol (11.9%).E. dalrympleanaoil contained α-pinene (26.2%), 1,8-cineole (19.3%) and α-terpineol (12.1%) andE. deaneioil contained 1,8-cineole (41.6%) and cryptone (17.6%);E. delegatensisoil contained α-pinene (28.3%), 1,8-cineole (26.4%) and γ-terpinene (18.0%),E. grandisoil contained α-pinene (44.7%) and β-pinene (30.5%) andE. salignaoil contained α-pinene (38.5%), β-phellandrene (12.2%) and 1,8-cineole (10.6%). Oils of the otherEucalyptusspecies contained α-pinene (13.2–44.7%) and 1,8-cineole (34.5–57.5%) as major constituents.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699567

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The essential oils from the bark, leaves and seeds ofGlycosmis pentaphylla(Cor.), Rutaceae, were analyzed by high-resolution GC and GC/MS. A total of 25, 6 and 29 compounds were identified, accounting for about 95%, 99% and 87–91% of the bark, leaf and seed oil yields, respectively. Substantial differences in the composition of the oils from the three plant parts were noticed. The bark and leaf oils were rich in aliphatic ketones (about 80% and 47%, respectivily) while the seed oil contained a high percentage of aliphatic (26%) and monocyclic (24%) terpene alcohols.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699568

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Water distilled oil obtained from the aerial parts ofOriganumxadanense, a newly described endemic hybrid in Turkey, was analyzed by GC/MS. One hundred and thirty six compounds representing 95.2% of the oil were identified with carvacrol (17.3%) and bicyclogermacrene (9.3%) as main constituents.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699569

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor