ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698570

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The essential oils ofCedronella canariensis(L.) Webb et Berth, ssp.canariensisand ssp.anisatafrom Tenerife, La Gomera, Madeira and from a location in South Africa were analyzed in detail by GC, GC-EIMS, GC-CIMS, MID, SC and13C-NMR. About 210 (ssp.canariensis) and 257 (ssp.anisata) compounds have been identified or at least partly characterized, with monoterpene ketone pinocarvone (>50%) as the most abundant compound of the oil of ssp.canariensisand methyl chavicol (>80%) as the main constituent of the oil of ssp.anisata.The latter was not identified in the ssp.canariensis.For both subspecies, two morphologically different formae were, f.glabraand f.pubescens.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698571

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Composition of the heartwood oil ofThuja occidentalisL. was investigated by a combination of capillary GC (retention indices) and GC/MS. The oil was obtained by steam distillation of various lots of waste residues from cedar shingle industries. Twelve out of 20 observed compounds were identified. Monooxygenated sesquiterpene compounds are the most important components (80% of the total). Occidentalol is the main component: its relative concentration varies between 20% and 50%, depending on the isolation parameters. This concentration decreased as the isolation proceeded, typically from 40–50% to 10–20% between 1 and 5 hours of distillation. Three occidol isomers, occidenol, and α-, β- and gamma;-eudesmols were also observed in relative concentrations of 4% to 12%. The monoterpene family is represented by terpinen-4-ol, and carvacrol. α-Thujaplicin, a tropolone derivative, is also among the products. The relative concentration of thujaplicin decreased from 5% to 0% between 1 and 5 hours of distillation.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698572

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The effects of light levels and growing media on growth and essential oil content inAngelica archangelicawere investigated under greenhouse conditions. Eight months after seed sowing, the highest shoot and root dry matter yield (810 g/plant and 438 g/plant respectively) was recorded from sand-hydroponic (SH) grown variants under supplemental light (SL). The highest oil yield (4.03 mg/plant) was produced by SH-grown plants under SL, while the lowest oil yield (1.74 mg/plant) was obtained from plants grown under organic culture with natural light (NL). The contribution of SL to dry matter (DM) shoot production under SH culture was 57%, while for root production this was found to be 61%. The DM root and total shoot yields of organically grown plants under SL declined by 11% and 18%, respectively, due to increased light intensity. Significant differences were found in the distribution of oil content in different organs, root sizes and the grinding of angelica samples. Thick and thin roots were found to contain more than 200% of oil compared to rhizomes. Thinner roots were measured to have the highest oil content (1.28%), followed by larger roots (1.03%). Stems were found to have the lowest oil content (0.07%). With the grinding intensity of the roots, it was possible to obtain more oil through distillation.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698573

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The essential oil of the white flowers ofFagraea berterianaA. Gray ex Benth. (Pua kenikeni) growing in Kona (Hawaii island) was prepared by simultaneous distillation and extraction (SDE). The oil was analyzed by GC and GC/MS. A total of 53 compounds were identified, of which (E)-β-ocimene (5.06%), methyl benzoate (11.97%), benzyl acetate (16.37%), methyl salicylate (4.00%), benzyl benzoate (7.26%), myristic acid (3.48%) and benzyl salicylate (3.56%) were found to make a major contribution to the characteristic odor of the flowers.F. berterianaflowers are creamy white when they commence blooming; however, by the second day they change to a subtle yellow color. The headspace volatiles of white and yellow flowers were also analyzed using GC and GC/MS and the results were compared. The major compounds of the headspace of the white and yellow flowers were the same as were found in the oil; however, (E)-β-ocimene accounted for 22.54% of the white flowers and 51.11% of yellow flowers, respectively. Quantitative differences were also found for: methyl benzoate (41.99% and 25.09%) and benzyl acetate (21.33% and 6.71%) for the white and yellow flowers respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698574

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The essential oil from the aerial parts of the plantSenecio chrysanthemoidesD.C. was analyzed using GC and GC/MS. Of the 19 constituents identified, nine were monoterpene hydrocarbons (5.16%), six were oxygenated monoterpenes (87.69%), three were sesquiterpene hydrocarbons (3.11%) and one was an oxygenated sesquiterepene (0.45%). The oil was rich in β-thujone (84.17%). Among the constituents, a new monoterpene 6-hydroxy-p-menth-4(5)-en-3-one was characterized using spectrochemical methods.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698575

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

In the period 1985–1992, studies were conducted in field conditions on the efficiency of different fungicides against rust,Phragmidium mucronatum(Pers.) (Schlecht.) and black spotDiplocarpon rosaeWolf. ofRosa damascenacv.trigintipetala.The fungicides Baikor, Folicur plus Saprol and Impact proved to be most effective against both diseases. The results obtained could be used by farmers and co-operatives to control rust and black spot on oil-bearing roses.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698576

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The essential oils obtained by water distillation from aerial parts ofAchillea biebersteiniicollected from two locations in Turkey were examined by GC and GC/MS. The oil of Ankara origin was rich in piperitone (49.90%). The oil of Erzurum origin contained 1,8-cineole (29.93%) and camphor (17.35%) as major constituents.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698577

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Essential oils of ripe fruits and umbels ofChaerophyllum coloraturnL. (Apiaceae) were found by GC and GC/MS to contain very high percentage of (E)-Pfarnesene (79.21% and 68.40% respectively).

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698578

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The composition of the water-distilled essential oils ofPsiadia lithospermifolia(Lam.) Cordem. andP. viscosa(Lam.) A. J. Scott, two endemic plant species belonging to the Asteraceae family from Mauritius, were determined by GC and GC/MS. Twelve constituents representing 84.32% of the oil were identified in the oil ofP. lithospermifoliawith (E)-isoasarone as the major component (51.55%). The oil ofP. viscosacontained 21 constituents representing 86.81% of the oil with pentyl 4-(l-methylethyl) benzoate (25.86%) as the major constituent.

ISSN:1041-2905    

DOI:10.1080/10412905.1995.9698579

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor