摘要:

Production biological and anatomical background of essential oil accumulation in the developing fruits ofFoeniculum vulgareMill, subsp.vulgarevar.vulgare(chemovar.; anethole, chemoform; low anethole - low methyl chavicol) were studied. Nine different stages of development of generative organs were distinguished for analysis. It was proved by histological investigations, that oil ducts (vittae) are present in the early stages of development of generative organs, even at the time of bud formation, however their relative area (calculated to the cross section) shows maximum at the time of seed setting (53.6%). The oil yield shows its maximum (11.6%) at that special time and in the early development stages of fruits, when the relative ratio of oil ducts is high and the accumulation of the assimilates (development of endosperm) have not started yet. In contrary the oil yield calculated to one schizocarp is increasing up to the final ripening stages (0.787 μL/fruit) and the process can be described by saturation function. Upon analyzing the compositional changes of the oil, it was proved that the accumulation ratio of myrcene continuously decreased throughout development, while the fenchone content showed an opposite tendency, its ratio was 9.1% in the buds and increasing afterwards up to 23.2%. However, the amplitude of the compositional changes was a moderate one and there was no need to revise the former chemotaxonomical classification of the population.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701177

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The chemical composition of the essential oil, isolated by steam distillation from the stem bark ofGuarea guidonia, was analyzed for the first time. The major components were identified as β-caryophyllene (25%) and germacrene D (24%) using a combination of GC, GC/MS,13C- and1H-NMR.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701178

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The essential oils ofZingiber cassumunar, Zingiberaceae, were isolated from its rhizomes and leaves by hydrodistillation. Analysis of the oils by GC and GC/MS revealed that the rhizome oil contained terpinen-4-ol (50.5%), (E)-l-(3,4-dimethoxyphenyl)buta-1,3-diene (19.1%), (E)-1-(3,4-dimethoxyphenyl)but-1-ene (6.0%) and β-sesquiphellandrene(5.9%)as major constituents out of 21 compounds identified. In the leaf oil 39 components were identified, and the main compounds were found to be l(10),4-furanodien-6-one (27.3%), curzerenone (25.7%) and β-sesquiphellandrene (5.7%).

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701179

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

Crushed fruits and herbal parts ofPimpinella anisetum, endemic in Turkey, were separately hydrodistilled. The oils were analyzed by GC/MS. Nine compounds representing 100% of the oil were identified in the fruit oil whereas 24 compounds making up 99.2% of the oil were characterized in the oil obtained from aerial parts. (E)-anethole (77.1% and 55.2%) and methyl chavicol (22.4% and 41.9%) were main constituents in the fruit and herb oils, respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701180

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The essential oils of ambrette (Hibiscus abelmoschusL., syn.Abelmoschus moschatus) were produced from seeds collected in the different provinces of Vietnam. Five samples were investigated and 35 components were identified by a combination of high resolution GC, GC/MS and13C-NMR spectrometry. The major constituents were found to be (E)-2,3-dihydrofarnesyl acetate (32.9-67.3%), (E,E)- farnesyl acetate (14.9-35.5%), the macrocyclic lactone ambrettolide (3.0-5.5%) and (Z,E)-farnesyl acetate (0.9-5.1%). The oils consisted for more than 90% of acetates and aldehydes.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701181

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The leaf oil obtained fromLindera queenslandicaB. Hyland, in 0.1% yield, contained β-elemene (21.4%), α-copaene (17.9%), β-caryophyllene (7.4%) and α-humulene (9.0%) as principal components. These four components accounted for over 50% of the oil in most analyses. The remainder of the oil consisted of mainly sesquiterpene hydrocarbons.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701182

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The essential oil of the aerial parts ofBupleurum rigidumssp.paniculatumhas been studied by means of GC and GC/MS. The main components of the oil were found to be α-pinene (26.4%), β-pinene (26.7%), myrcene (26.2%) and limonene (12.2%).

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701183

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The essential oil isolated by steam distillation from the aerial parts ofThymus kotschyanusBoiss. and Hohen was analyzed by capillary GC and GC/MS. Among the 26 compounds identified, the major components were carvacrol (41.4%), thymol (19.6%), γ-terpinene (10.3%) and p-cymene (5.3%).

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701184

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

Rose-scented geranium(Pelargoniumsp.) was propagated by tissue culture and cuttings. The hydrodistilled oils from the two groups of plants were analyzed by GC and GC/MS. The two oils contained similar major components in relative amounts except citronellol which differed by a large margin. The major components in the oils from plants raised by tissue culture and cuttings were citronellol (36.1%; 42.8%), citronellyl formate (8.3%; 11.5%), geraniol (9.2%; 9.1%) and isomenthone (9.9%; 7.1%), respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701185

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

Organophosphorus and organochlorine residues were studied on 31 samples of Uruguayan lemon oils corresponding to the 1995 season from North and South areas of fruit production in the country. Organochlorine pesticides were absent in all die samples analyzed. The average level of contamination for the organophosphorus pesticides (Chlorpyrifos and Methidathion) was 0.80 ppm and 15.05 ppm for die samples corresponding to the North and South areas, respectively. The results were compared with those obtained in 1993 in lemon oils from the same areas of production.

ISSN:1041-2905    

DOI:10.1080/10412905.1999.9701186

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor