摘要:

The hydrodistilled essential oils from the leaves, stem, wood and roots of aCinnamomumsp., obtained from wild stands in the Hà Bac province of Vietnam, were examined by a combination of high resolution GC and GC/MS. 2-Methylene-3-buten-1-yl benzoate, a hitherto unknown plant component, was found to be the major constituent of the leaf (85.9%), stem (92.4%) and wood (44.2%) oils. Camphor was the second most abundant constituent of the wood oil (13.0%). The root oil contained mainly safrole (63.8%) and camphor (17.9%). The structure of 2-methylene-3-buten-1-yl benzoate was elucidated by mass,1H- and13C-NMR spectrometry. Spectral data are presented.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700715

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Uracil herbicide residues were studied in the medicinal plant lemon balm (Melissa officinalisL. c.v. citra) grown under standard agrochemical conditions. The residues from the uracil herbicides bromacil, lenacil, and terbacil were determined at selected phases of flower development. In addition the main components of theM. officinalisoil were determined by GC/MS at the same stages of development such as bud set, at the beginning of bloom, and at full bloom. TLC on silica gel with selective biochemical detection was used for the determination of herbicide residues in the plant material. It was found that the sample of plant material harvested in full bloom state contained 0.007 mg/kg of bromacil residue, and 0.005 mg/kg of lenacil and terbacil residues. The application of the herbicide at a rate of 2 kg/ha did not affect the quality of the treated plant.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700716

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The composition of thirteen essential oils of African origin (mostly Cameroon) were examined by GC and GC/MS. Oils ofXylopia aethiopicaA. Rich.(Fruits),X. parviflora(A. Rich) Benth. (Fruits),Monodora myristica(Gaertn) Dunal (Fruits),M. brevipesBenth. (Seeds),Annona senegalensisPers. (Fruits),Cananga odorataHook. f. et Thomson (Fruits, Leaves),Tagetes minutaL. (Leaves, Flowers),Hernan-dia voyroniR. Cap. (Bark),Ageratum conyzoidesL. (Leaves),Cymbopogon citratus(DC) Stapf (Leaves) andAframomum citratumPereira ex Oliv. et Hanb.) (Seeds) were included in this study. The major components of the oils wereX. aethiopica:β-pinene (17.4%), sabinene (23.9%) and terpinen-4-ol (12.9%);X. parviflora:α-pinene (14.0%) and β-pinene (40.0%);M. myristica:α-phellandrene (48.8%) and α-pinene (15.9%);M. brevipes:α-phellandrene (74.9%),A. senegalensis;α-phellandrene (24.9%), α-pinene (11.9%) and myrcene (11.3%);C. odorataFruits: α-pinene (11.1%), myrcene (24.7%) and sabinene (34.3%);C. odorataLeaves: α-pinene (14.0%), β-caryophyllene (26.3%) and germacrene D (11.7%);T. minutaLeaves: (E)-tagetenone (16.9%), (Z)-tagetenone (16.8%) and (Z)-tagetone (11.6%);T. minutaFlowers: (Z)- β-ocimene (31.8%) and (Z)-tagetone (46.0%);H. voyroni:perillalde-hyde (82.8%);A. conyzoides:β-caryophyllene (10.5%) and precocene I (81.0%); C. citratus: myrcene (12.8%), geranial (45.9%) and neral (33–5%) and A. citratum: geraniol (68.9%) and linalool (15.1%). These compositions were correlated with the antimicrobial activities of the oils towards six microbial strains (Staphylococcus aureus, Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae, Pseudomonas aeruginosa and Candida albicans). Oils ofCymbopogon citratus, Hemandia voyroni and Aframomum citratumdisplayed noteworthy antibacterial and antifungal activities.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700717

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

In vitroantifungal activity of the essential oils fromMonarda citriodoraandMelaleuca alternifoliawas evaluated on 15 common post-harvest pathogens of a variety of crops. Both oils exhibited a high level of antifungal activity both by direct contact and in the vapor phase. Oil fromMonarda citriodorawas generally more active than that fromMelaleuca alternifolia, particularly against more rapidly growing fungal species.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700718

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The chemical composition of the essential oil ofAristolochia melanoglossaSpeg. from Argentina was investigated by GC and GC/MS. The oil consisted mainly of sesquiterpenes and a small percentage of monoterpenes. A total of 26 compounds were identified. The major components found in the oil were spathulenol (17.75%), β-caryophyllene (17.70%) and caryophyllene oxide (11.27%).

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700719

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The essential oil ofArtemisia absinthiumL. of Cuban origin has been analyzed by GC and GC/MS. More than 40 compounds were identified, of which bornyl acetate (23.02%) was the major constituent.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700720

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Water-distilled essential oil ofOriganum acutidens, an endemic species of Turkey, was analyzed by GC and GC/MS. Forty-six components constituting 99.04% of the total components detected were characterized. Carvacrol (66.25%) and p-cymene (13.99%) were identified as major components.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700721

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Fitzalania heteropetalaF. Muell. produced a leaf essential oil, obtained in 0.05–0.15% yield based on fresh leaves, which consisted entirely of sesquiterpenes and contained β-caryophyllene (33–8%) and aromadendrene (14.0%) as its major components.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700722

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The essential oil ofAmbrosia microcephalawas analyzed by GC/MS. Camphor (6.21%), Bornyl acetate (12.82%), β-himachalene (13.00%) and β-bisabolene (18.76%) comprise 50% of the chemical constituents found in this oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700723

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The leaf oil ofHexalobus monopetalus(Annonaceae) from Benin was analyzed by high resolution GC and GC/MS. Forty components were identified, representing more than 95% of the oil. The main constituents were geranial (37.9%), neral (30.9%), linalool (3.5%), (E)-anethole (2.6%), selin-ll-en-4α-ol (2.5%) and caryophyllene oxide (2.4%).

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700724

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor