摘要:

The essential oilof Nidorella resedifolia(Compositae) from Zimbabwe was analyzed by a combination of GC, GC/MS and NMR and found to contain mainly monoterpene hydrocarbons; β-pinene(39.8–40.4%), limonene(17.8–18.0%), and lavandulyl esters; lavandulyl acetate (0.43–0.44%), lavandulyl isobutyrate (0.33–0.75%), lavandulyl isovalerate and lavandulyl 2-methylbutyrate (3.7–7.5%). These esters are thought to be responsible for the pleasant sweet floral odor of this oil. A new sesquiterpene alcohol, β-bisabolen-12-ol (0.24%), was characterized for the first time in this oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698079

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The chemical composition of the essential oil of the air-dried above ground materialof Saussurea involucrataof Chinese origin was investigated by a combination of techniques such as capillary GC, GC/MS, IR and1H-NMR. Although 45 compounds were identified, the main components were palmitic acid (21.29%), dihydrodehydrocostus lactone (16.86%), n-propyl acetate (10.96%), lauric acid (8.48%) and dehydrocostus lactone (7.83%).

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698080

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The volatile constituents of the essential oil ofPassiflora incarnataL. were investigated by GC, GC/MS and GC/FTIR. The main compounds of the oil were hexanal (1.4%), benzyl alcohol (4.1%), linalool (3.2%), 2-phenylethyl alcohol (1.2%), 2-hydroxy benzoic acid methyl ester (1.3%), carvone (8.1%), trans-anethole (2.6%), eugenol (1.8%), isoeugenol (1.6%), β-ionone (2.6%), α-bergamotol (1.7%), phytol (1.9%) and the two fatty acids—palmitic (7.2%) and oleic acid (6.3%). More than 150 minor components were also identified in this essential oil by analysis with these GC systems.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698081

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

After fractionation by normal distillation under reduced pressure followed by silica gel chromatography, the volatile fractions of the hexane concrete ofGardenia taitensisDC were investigated using GC/MS and GC/FTIR, and more than 150 components were identified. The major oxygenated constituents were found to be linalool (4.4%), methyl salicylate (2.5%), (Z)-3-hexenyl benzoate (2.2%), dihydroconiferyl alcohol (1.1%), (Z)-3-hexenyl salicylate (0.7%), benzyl benzoate (6.2%), dihydroconiferyl acetate (12.2%), 2-phenylethyl benzoate (6.2%), benzyl salicylate (2.5%), geranyl benzoate (2.1%) and 2-phenylethyl salicylate (2.2%). The identification of numerous dihydroconiferyl esters appears to be unique to this species.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698082

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The essential oil of several natural populations of P.vitifoliumwas analyzed by GC and GC/MS. The main constituents found were citronellic acid (77–85%) and 10-epi-γ-eudesmol (5%).

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698083

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The chemical composition of the essential oils obtained by hydrodistillation from Spanish wild-growing myrtle leaves, flowers, unripe and ripe fruits was examined by GC/MS. About 130 constituents were present in the various oils, from which 80 components could be identified and quantified. The yields of the hydrodistilled oils obtained from different plant parts were: leaves, 0.4–0.5%; flowers, 0.4%; unripe fruits, 0.5% and ripe fruits, 0.02%. Significant differences were found in the concentrations of the main constituents of the oils, e.g. α-pinene (7–20%), 1, 8-cineole (16.5–61.5%) and myrtenyl acetate (0.1 to 36%). Apart from the variation in the yields during ripening (0.5–0.02%) the concentration of the main constituents also changed, e.g. 1, 8-cineole increased from 19.5% to 61.5% while myrtenyl acetate decreased from 33.0% to 0.1%.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698084

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

3-(3′, 4′, 5′-Trimethoxyphenyl)- propanyl acetate and propionate, as well as 3-(3′, 4′, 5′-trimethoxyphenyl)-2-propenyl acetate and propionate were identified in a low volatile fraction isolated from cold-pressed Sicilian lemon oil. The propionates are hitherto unknown natural products; the acetates have not been reported so far as constituents of lemon oil. The structures of these four obviously related compounds were deduced from spectroscopic data and confirmed by synthesis.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698085

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Terpinolene-rich chemical varieties ofMelaleuca alternifoliaand M.trichostachyahave been found in both natural and cultivated stands. The variation in chemical composition of these varieties, which also contain substantial quantities of 1, 8-cineole, is reported. An investigation of along-the-branch leaf pairs suggested that terpinolene may be formed along with the l, 8-cineole via a terpinen-8-yl moiety rather than the terpinen-4-yl moiety that leads to γ-terpinene in the terpinen-4-ol rich chemical variety ofMelaleuca.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698086

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

GC and GC/MS analysis of the essential oils of leaves, spikes, flowering leafy branches and woody stems ofDorystoechas hastatawere conducted. Forty-seven compounds representing 87–98% of the oil were identified. Oil compositions varied according to the mode of distillation, plant part and collection site. Major components included 1, 8-cineole, α-pinene, borneol, guaiol and camphor.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698087

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Lovage(Levisticum officinaleKoch) was cultivated in Puumala, South Finland (61°40′N, 28°15′E) during the years 1984–1989. The plants over wintered well and produced fertile seeds each year with an average germination capacity of 68%. The plants reached a maximum height of 2–2.5 m in the second year. The root weight continued to increase as the plants grew older, until it reached a maximum of 1.1 kg/plant in the fifth year. In the second year 0.2–0.3 kg/m2dry leaf and in the third year 0.5–0.6 kg/m2dry root yield can be expected from the cultivations. The quantity of the essential oil obtained from the dry leaves varied between 0.16–0.31%, and its main components were α-terpinyl acetate (60%) and β-phellandrene (16–25%). The essential oil in the one-year-old roots was 0.17% and in the two-year-old roots 0.83–1.30%. The main component of the root oil was (Z)-ligustilide (37–62%). Leaf harvest during the vegetation period gave a lower oil content and also caused remarkable changes in the root oil composition. On the basis of six years of experiments it seems possible to produce high quality lovage in Finland.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698088

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor