摘要:

It has been shown that statistically significant higher oil yields could be obtained fromArtemisia afrawhen the plants were harvested during anthesis and early seed set. The chemical composition of four generations of the same clone was found to be very constant. On examination of the oil composition of wild populations ofA. afra, the existence of chemotypes was revealed. Oils rich in 1, 8-cineole (50.14%), α-thujone (74.91–75.28%), β-thujone (21.49–22.44%), and camphor (27.92%) were found.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697870

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

A few Sandalwood odor molecules and very similar odorless compounds have been compared with t-Butyl-bicyclodecan-3-ol, a substance which possesses a Sandalwood-like fragrance, using a new method of molecular shape comparison. Important prerequisites are an exact analysis of all possible conformations of the investigated molecules and the best possible matching of the two geometries in question. Previous results about the shape of such molecules in principle were affirmed and a correlation between volume comparisons and olfaction of the molecules was found.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697871

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Ten oils (essential and empyreumatic) and extracts from the woods ofJuniperus oxycedrusL. andJuniperus phoeniceaL. were obtained by different methods (steam distillation, solvent extraction, wood pyrolysis, column chromatography, molecular distillation, rectification and extraction of precedent oils and extracts). The different oils and fractions were analyzed by coupled GC/MS; their chemical specificities are compared and discussed for subsequent dermatological applications.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697872

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

BelgianArtemisia albahas formerly been reported to be rich in α-thujone, while micropropagation did not lead to essential oil producing plants. In this study, Belgian plants were found to afford mainly isopinocamphone (34%) and camphor (21%), together with smaller amounts of camphene, β-pinene, 1, 8-cineole, myrtenal, myrtenol and T-cadinol, but no α-thujone. An alternative micropropagation method was developed, by which the plants retained their ability to produce an essential oil similar to that of the mother plants. This ability to produce essential oils was found to be media related. The inclusion of vitamins, macrosalts, sugar and hormones of the medium appeared to be of great importance for oil production.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697873

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The oil composition of three genotypes ofMentha x verticillatawere analyzed by means of GC/MS. The oil of all genotypes was characterized by high percentages of menthol. Several mono- and sesquiterpenes were also identified and among them limonene, menthone, menthyl acetate, germacrene D and β-caryophyllene were the most abundant.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697874

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The chemical composition of the essential oil ofDaphne genkwaSieb. et Zucc. from China was investigated by a combination of chromatographic and spectroscopic techniques and 121 compounds were identified. The major components of the oil were furfural (2.8%), α-copaene (3.1%), α-santalene (6.9%), β-caryophyllene (3.4%), β-santalene (2.4%), δ-cadinene (4.0%), methyl eugenol (4.6%), nerolidol (2.0%), elemicin (4.5%), and 2, 3-dihydrobenzofuran (2.7%).

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697875

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Although epoxy-n-alkanes can be produced from the corresponding alkene by microorganisms only if they were grown on hydrocarbons, the terminal double bond of acyclic terpenoids can be oxidized by some glucose using strains in high optical yields. While most fungi possess hydrolases which open the epoxides to diols with e.e. of 95–98% we found some microorganisms which did not affect the epoxide. Alcohols like linalool or nerolidol reacted intramolecularly with the oxiran moiety to yield tetrahydrofurans and tetrahydropyrans. The absolute configuration of the epoxide is usually S but depends on the strain for its optical purity. The configuration of the epoxides were independent of the absolute configuation of the substrate.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697876

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The essential oils of A.katsumadai, obtained by hydrodistillation of the leaves, stems and seeds, were analyzed by GC/MS. The leaf and stem oils were similar in composition, with α-pinene, β-pinene, myrcene, α-phellandrene, 1, 8-cineole, fenchone and geraniol as major constituents. The seed oil had a different composition, with myrcene, linalool, citronellol, geraniol, decanol, citronellyl and geranyl acetates as main components.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697877

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

The essential oil obtained fromOcimum basilicumL. grown in Portugal was analyzed by gas chromatography. It was found that the major components were linalool (32.2%) and methyl chavicol (16.42%).

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697878

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor

摘要:

Capillary GC of the essential oil ofLippia alba(Mill.) N.E.Br. showed a high content of citral (64.6% = 28.2% neral and 36.4% geranial). The oil was found to possess strong antifungal activity againstTrichophyton mentagrophytesvar.interdigitaleandCandida albicans.

ISSN:1041-2905    

DOI:10.1080/10412905.1990.9697879

出版商:Taylor & Francis Group    

年代:1990

数据来源: Taylor