摘要:

The essential oil from leaves ofClausena anisum-olens(Blanco) Merr. var.anisum-olens(Rutaceae) is studied individually on 91 cultivated and wild plants. Main compounds in the oil were (E)-anethole and/or methyl chavicol, and their respective percentages were stable through time and cultivation for each plant. Variations in oil contents between individuals showed a distribution pattern of apparent genetic origin, with three chemovariants: “pure anethole” oil, “pure methyl chavicol” oil, and “mixed” oil (about 90% anethole—10% methyl chavicol).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699480

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Chemical composition of the essential oils obtained by hydrodistillation from Albanian wild growing myrtle leaves, flowers and ripe fruits was examined by GC/MS. Over one 100 compounds were detected in the oils, from which more than 40 could be identified. Significant differences were found in the concentrations of the main constituents of the oils, from varoius parts of the plant, such as α-pinene (11.4–22.5%), 1,8-cineole (13.8–21.8%), linalool (8.8–16.7%) and myrtenyl acetate (11.3–17.7%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699481

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Artemisia verlotiorumLamotte plants originating from Côte-d'Azur (France) were hydrodistilled and the oil (0.35% yield) was analyzed by a combination of GC and GC/MS. Among mass spectra recorded, more than 70 constituents accounting for 96% of the oil were characterized. The major compounds were α-thujone (47.0%), β-thujone (10.0%), 1,8-cineole (21.0%) and β-caryophyllene (3.4%). Twenty other sesquiterpenic derivatives were also present (4.0%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699482

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Essential oil from hydrodistilled herbal parts ofEchinophora lamondiana(Umbelliferae), a newly described endemic species of Turkey, was analyzed by GC/MS. Forty-three compounds representing 99.1% of the oil were identified with δ-3-carene (48.0%), α-phellandrene (27.7%) and p-cymene (7.4%) as main constituents.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699483

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The essential oil of the leaves and stems ofCalycolpus australis, collected in Minas Gerais, Brazil and examined by GC/MS, is dominated by γ-terpinene (14.07±2.92%), terpinen-4-ol (13.11±1.03%), linalool (12.52±0.91%) and α-terpinene (11.53±1.93%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699484

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Water-distilled essential oil ofNepeta racemosaLam. was analyzed by GC and GC/MS. The main constitutents of the oil were found to be 4aα, 7α, 7aα-nepetalactone (64.9%), (Z)-β-ocimene (9.5%), (E)-nerolidol (8.8%) and 4aα,7α,7aβ-nepetalactone (7.4%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699485

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The oil and headspace of fresh white flesh guava fruits(Psidium guajavaL.) from trees grown in Reunion island were obtained by steam hydrodistillation and headspace solid-phase microextraction (SPME), respectively. The chemical composition of the extract was investigated by gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). A total of 73 compounds were identified, of which 61 by hydrodistillation and 24 by headspace SPME. In the headspace, the major constituents were: hexanal (65.9%), γ-butyrolactone (7.6%), (E)-2-hexenal (7.4%), (E,E)-2,4-hexadienal (2.2%), (Z)-3-hexenal (2.0%), (Z)-2-hexenal (1.0%), (Z)-3-hexenyl acetate (1.3%) and phenol (1.6%), while β-caryophyllene (24.1%), nerolidol (17.3%), 3-phenylpropyl acetate (5.3%) and caryophyllene oxide (5.1%) were the major volatile constituents present in the hydrodistilled oil. Many compounds were identified for the first time in the guava fruit such as γ-butyrolactone (7.6%) in the headspace SPME and nerolidol (17.6%) in the oil. In addition some compounds such as (Z)-3-hexenal, (E,E)-2,4-hexadienal, γ-butyrolactone, borneol, phenol, cuminyl alcohol could be identified only by the headspace method (SPME).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699486

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The chemical composition of the volatile oils of seeds ofFoeniculum vulgareMiller from two Spanish locations (Santander and Aranjuez) were investigated by means of GC and GC/MS. Leaf and stem oils ofF.vulgarefrom Aranjuez were also examined. Two different chemotypes have been found in the seeds: (I) methyl chavicol (54.9%), fenchone (24.6%) in the seeds collected in Santander; and (II) (E)-anethole (54.9–38.1%), fenchone (22.2–34.4%) in the seeds gathered in Aranjuez. The oil from the leaves collected in Aranjuez (April, June) was found to contain methyl chavicol (12.3–12.1%), α-phellandrene (9.4–27.2%), limonene (25.3–18%) and fenchone (19.4–18.3%) as major constituents. The oil from the stems gathered in Aranjuez (September) was characterized by a high content of (E)-anethole (17.4–3–3%), α-pinene (9.7–14.4%), α-phellandrene (24.3–31.4%), p-cymene (11.5–5–2%), limonene (11.6–15%) and fenchone (9–1–17–5%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699487

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

The chemical composition of the volatile concentrates of the flowers ofCouroupita guianensis, Lecythis usitata var. paraensisandEschweilera coriaceawere examined by GC/MS. The major components identified in the flowers ofC. guianensiswere linalool (21.5%), eugenol (18.9%) and (E,E)-farnesol (16.1%). The main constituents of the flowers ofL. usitatavar.paraensiswere 2-phenylethyl alcohol (40.8%), phenylacetaldehyde (28.2%) and linalool (22.1%). The flowers ofE. coriaceawere dominated by (E)-β-ocimene (23.4%) and hexanal (11.6%).

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699488

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Grapefruit oil concentrates were prepared by vacuum distillation and analyzed by GC/MS. Twenty-five compounds were identified of which limonene (64–85%) was the major constituent. The influence of the concentration process on oxygenated compounds was also evaluated. Cold-pressed oil concentrated two-fold, five-fold and ten-fold produced two-, four- and five-fold concentration increases in oxygenated compounds, respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.2000.9699489

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor