摘要:

Organophosphorus insecticides are common pollutants of the citrus oils. Unknown phosphorated compounds, different from organophosphorus pesticides, were detected during GC analyses of citrus oils; the chromatographic profile was similar to a triarylphosphate mixture. Standard mixtures of triarylphosphates were analyzed and mass spectra were obtained; the results showed that the contamination was due to triphenylphosphate and tritolylphosphate isomers essentially. The contaminants were found to probably originate from contact of the oils with plastic materials from which they leached on oil storage.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700798

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The leaf oil ofFlourensia cernuaDC. collected from the Jomada Experimental Range in southcentral New Mexico was analyzed. GC/MS and retention indices were used to identify 89 components. β-Eudesmol (24.5%), α-eudesmol (6.9%), limonene (6.6%), γ-eudesmol (4.6%), myrcene (3.8%), borneol (3.3%), and δ-3-carene (3.0%) were the major components of the steam distilled oil. In an ethanol extract of intact leaves, flourensadiol (44.6%), artemisia alcohol (5.5%), viridiflorol (2.7%), and borneol (2.0%) were the main components.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700799

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Essential oils were obtained by hydrodistillation of the leaves, flowers and fruits ofCallistemon lanceolatusin 0.2–0.6%, 0.2% and 0.2% yield, respectively, and from the flowers and fruits ofC. polandiiin 0.1% and 0.1% yield, respectively. The oils were analyzed by a combination of column chromatography, GC and GC/MS. The leaf, flower and fruit oils ofC. lanceolatuscontained 1,8-cineole (41.1%) and α-pinene (11.6%); β-pinene (51.2%) and 1,8-cineole (11.7%); and 1,8-cineole (38.8%) and α-terpineol (15.7%), respectively. The flower and fruit oils ofC. polandiicontained α-pinene (16.2%) and β-pinene (45.8%); and 1,8-cineole (16.3%) and α-terpineol (13–5%), respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700800

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The chemical composition of the oils of one population ofSatureja montanaL. subsp.pisidica(Wettst.) Silic and two populations ofS. montanasubsp.montanawere investigated on the intrapopulational and interpopulational level by GC and GC/MS. All samples of the populations were grouped according to dominant constituents in the oils and chemotype. The results showed a significant individual variability of the oil composition. In all oil samples, the quantity of sesquiterpene compounds was smaller than the quantity of Monoterpene compounds; with the oxygenated monoterpenes being greater than the Monoterpene hydrocarbons. The main constituents of S.montana ssp. pisidicaoils were found to be p-cymene (22.4–75.5%), linalool (22.5–68.0%) and carvacrol (26.2–70.5%). The main components ofS. montanassp.montanaoils were shown to be p-cymene (14.5–47.7%), trans-sabinene hydrate (14.2–27.1%), linalool (14.4–74.0%), borneol (18.1–29.6%) and p-cymen-8-ol (11.3–27.0%). The domination of the plants of the aromatic chemotype was determined in all of the investigated populations. By comparing the oils of the examined plant populations, it was found that there was more similarity, in quAlltative and quantitative composition of essential oils, the presence of chemo-types and their frequency, than between populations that belonged to the same subspecies and which have habitats similar in basic climatic factors.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700801

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Litsea monopetala(Roxb.) Pers. (Lauraceae) is a “muga” silk worm fodder tree in Northeast India, with the local name “sualu.” The oils of this species, obtained by steam distillation of the fresh fruits, flowers and bark, were examined by high resolution GC and GC/MS for the first time. From the more than 50 compounds separated by GC, about 40 to 45 compounds have been identified in the various oils, accounting for 89–5% to 93.8% of the oils. The major components of the flower oil were α-caryophyllene alcohol (13.9%), pentacosane (11.4%), caryophyllene oxide (9.5%), humulene oxide (9.5%) and tricosane (8.1%). The more volatile fruit oil consisted mainly of decanal (26.7%), nonanol (16.8%) and capric acid (15.5%). The bark oil was mainly composed of aldehydes, alcohols and acids, of which tetradecanal (30.2%), tridecanol (11.3%), myristic acid (10.5%) and tridecanal (9.4%) predominated.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700802

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The composition of the leaf oilof Juniperus gracilior var. urbanianafrom Haiti was analyzed and compared to the composition of the other Caribbean junipers. The oil was dominated by bornyl acetate (38.4%) with moderate amounts of limonene (12.2%), sabinene (12.2%) and camphor (5.8%).J. gracilior var. urbanianaappeared to be most closely related toJ. graciliorvar.ekmaniiandJ. gracilior.The evolution of the Caribbean junipers is discussed.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700803

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The composition of the essential oils of the aerial parts ofTeucrium creticumL. (Lamiaceae) from Cyprus was determined by GC and GC/MS. A total of 34 components were identified. The major constituents of the flower and leaf oils were linalool (23.1%), β-caryophyllene (13.3%) and caryophyllene oxide (11.3%), while β-caryophyllene (22.0%), caryophyllene oxide (157%), spathulenol (l4.2%) and linalool (10.6%) were the major components of the flower, fruit and leaf oils. The major constituents of the flower oil were β-caryophyllene (21.5%), followed by caryophyllene oxide (13–8%), Linalool (12.0%), germacrene D (10.8%) and spathulenol (8.6%) while an α-bisabolol oxide (l6.7%), caryophyllene oxide, β-bourbonene (9–9%) and linalool (8.1%) were major components of the stem oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700804

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The essential oils obtained from the leaves ofEucalyptus globulusLabil spp.globulus, Eucalyptus radiataSieb. ex DC spp.radiataandEucalyptus smithiiR. Baker, were analyzed by GC and GC/MS. The oil yields of the three species ranged from 6.0% to 9.0% (dry weight basis). The major components in the oils were 1,8-cineole (70.1–86.4%), α-pinene (1.7–14.0%), Umonene (3.7–5.7%) and α-terpineol (1.9–6.4%).

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700805

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The steam distilled and hydrodistilled oils ofMyricagaleleaves were analyzed by GC and GC/MS. They were found to contain myrcene (7.7–20.4%), Umonene (8.1–15.3%), p-cymene (3.2–10.3%) and β-caryophyllene (92-18.6%). In contrast, a CO2extract of wax myrtle contained limonene (11.1%), selin-11-en-4-ol and nonacosane (26.2%), while a microwave assisted hexane extract contained nona-cosane (71.2%). The headspace of the leaves was found to be rich in myrcene (31.5%), limonene (24.0%) and p-cymene (19.1%).

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700806

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

The composition of essential oils obtained fromSatureja horvatiisubsp.macrophyllaby hydrodistillation and micro-simultaneous distillation/extraction (SDE) were analyzed using GC and GC/MS for the first time. Thirty-nine constituents were found with percentage compositions >0.1% in both essential oils isolated. The major oil constituents were thymol (46.1–46.7%), p-cymene (14.3–15.5%) and γ-terpinene (7.1–8.2%). There were no major differences in the oil composition for constituents composing >0.8% between the two methods of oil isolation indicating that SDE is a suitable isolation procedure when small amounts of plant material are available.

ISSN:1041-2905    

DOI:10.1080/10412905.1997.9700807

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor