摘要:

The volatile constituents obtained by solvent extraction of the juices of both blood and blond sweet oranges(Citrus sinensis(L.) Osbeck) were studied. Some known compounds are reported in orange juice for the first time. The spectral data of four new sesquiterpenoids (valencene hydrate [1], γ-selinene hydrate [2], selina-3,11-dien-5-ol [3], epoxy-valencene [4] and of a sulfur-containing compound (S,S'-ethylidene dithioacetate [9]) identified for the first time in a natural product, are given and an olfactive comparison is included.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701025

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The composition of bitter orange petitgrain oil was studied by HPLC-GC/MS (ITD) and GC/MS (quadrupole), and it was found that data obtained with the two methods were in good agreement. The LC-GC system allowed the LC separation of the oil into two fractions (hydrocarbon and oxygenated compounds), then the automated transfer in GC prior to the identification of the components. Bitter orange petitgrain oil showed a high content of oxygenated compounds which varied from 91% to 96%. Linalyl acetate, which represented more than 50% of the whole oil, and linalool, which ranged from 22% to 33%, were the main components. Limonene, (E)-β-ocimene, myrcene and β-pinene were the highest monoterpene hydrocarbons. Twelve sesquiterpene hydrocarbons were identified. β-Caryophyllene is the most representative of this fraction.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701026

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The essential oils from the epigeous (above ground) and hypogeous (below ground) parts ofSmyrnium perfoliatumL., which were obtained by hydrodistillation, were subjected to analysis by GC and GC/MS. The major components were found to be aromadendrene (49.87%), neryl isovalerate (10.49%), γ-muurolene (4.90%) and α-santalene (4.88%) in the epigeous part oil and α-pinene (39.31%), aromadendrene (13.25%) and α-terpinyl valerate (10.05%) in the hypogeous part oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701027

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Four chemotypes ofThymus zygioidesvar.lycaonicusfrom different localities in Turkey were collected. Their oils were investigated by GC/MS. Geraniol (68.55%), carvacrol (48.14%) and α-terpinyl acetate (36.18%) and thymol (41.75% to 57.18%) were found as the major constituents of the four distinct chemotypes.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701028

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The composition of the volatile concentrates obtained from stems and leaves of three mistletoes,Viscum albumL. var.coloratumgrown in China, dried and freshV. albumL. var.coloratumgrown in Nara and Wakayama prefecture in Japan, driedV. albumL. grown in Germany andTaxillus kaempferigrown in Japan have been investigated by GC and GC/MS respectively. Each oil contained more than 200 compounds. Components of the oil fromV. albumvar.coloratumgrown in various environments were similar, although they contained some compounds possibly characteristic of their host tree. The oil ofV. albumcontained more carboxylic acids than that ofV. albumvar.coloratum.Constituents of the oil ofTaxillus kaempferiwere obviously different from that of the other two mistletoe oils examined.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701029

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The chemical composition of the peel and leaf oils of four MalaysianCitrus species (C. hystrixD.C.,C. aurantifoliaSwingle,C. maximaMerr. andC. microcarpaBunge) was examined by co-chromatography, two columns of different polarity, GC/MS and linear retention indices. β-Pinene and limonene were the major constituents of the peel oils ofC. hystrix(39.3% and 14.2%) andC. aurantifolia(28.4% and 39.3%). The peel oils ofC. maximaandC. microcarpawere found to be rich in limonene (>94%). Citronellal at 72.4% was the most abundant compound in the leaf oil ofC. hystrix.The major components of the leaf oil ofC. aurantifoliawere geranial (19.4%), limonene (16.4%) and neral (11.4%). Sesquiterpenes were present at 70.8% in the leaf oil ofC. microcarpawhere hedycaryol (19.0%), β-sesquiphellandrene (18.3%) and α-eudesmol (14.4%) were the major constituents. The leaf oil ofC. maximacontained significant amounts of phytol (23.1%) and β-caryophyllene (15.4%).

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701030

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The leaves, petioles and rhizomes ofCurcuma aromaticaSalisb. (Zingiberaceae) from Assam, India, were subjected to steam distillation. The resulting essential oils were analyzed by high-resolution GC and GC/MS. The leaf, petiole and rhizome oils contained more than 51, 50 and 61 components respectively, of which 43, 41 and 53 constituents have been identified, accounting for about 96.8%, 86.3% and 86.3% of the bulk of the respective oils. The major components in the leaf, petiole and rhizome oils were found to be 1,8-cineole (20.0%, 8.8% and 9.3%, respectively), camphor (18.0%, 16.8% and 25.6%), germacrone (11.8%, 0.2% and 10.6%), isoborneol (6.4%, 6.8% and 8.2%) and camphene (9.4%, 1.2% and 7.4%). Additional notable constituents included limonene (8.6%) in the leaf oil, caryophyllene oxide (8.7%), patchouli alcohol (8.4%) and elsholtzia ketone (6.0%) in the petiole oil, and curzerenone (10.9%) in the rhizome oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701031

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Essential oils from Bulgarian populations ofNepeta nudaL. andN. catariaL. (two origins) and of the Caucasian endemicN. grandifloraM.B. (Lamiaceae) were analyzed by GC/MS, TLC and chemical transformation. Iridoids of the nepetalactone type were the main constituents, accompanied by other terpenoids. Some of the constituents were found for the first time in the genusNepetafrom natural sources.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701032

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Volatile concentrates were prepared concurrently from Rabbiteye blueberry, cv. Tifblue, and deerberry at three stages of maturity by continuous vacuum steam distillation-hexane extraction, and were analyzed by capillary GC and GC/MS. Six major components were identified in blueberries and ten compounds in the deerberry extract. Linalool levels increased, whereas α-terpineol and β-caryophyllene decreased during blueberry maturation. In contrast, levels of most deerberry volatile compounds decreased, except for three esters which increased during maturation.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701033

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The essential oils isolated by hydrodistillation from the fresh leaves, stems and rhizomes ofPiper lolotC. DC. have been analyzed for the first time by a combination of GC and GC/MS. The oils contained more than 35 compounds, of which 25 constituents could be identified according to their chromatographic retention indices and mass spectra. The main constituent of the oils was β-caryophyllene (26.1–30.9%). The rhizome oil contained bornyl acetate (10.0%) as second major component.

ISSN:1041-2905    

DOI:10.1080/10412905.1996.9701034

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor