摘要:

The essential oil fromArtemisia persica(Compositae) from Ladakh, India, was found to contain mainly functionalized monoterpenes with artemisyl (artemisia ketone, yomogi alcohol) and thujyl skeleton (sabinene, trans-sabinol, cis- and trans-sabinene hydrate, α- and β-thujone, thujenal, trans-sabinyl acetate).

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698002

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The essential oil obtained from the aerial parts ofHyptis suaveolensPoit collected in the Kumaun Region of India was found (by GC/MS) to differ chemically from that reported from chemotypes collected in South America and Malaysia. The main components of this Indian oil were sabinene (41.0%), β-pinene (9.8%), β-caryophyllene (7.9%), and limonene (6.8%), accompanied by more than 50 other compounds including (Z)-α-trans-bergamotol (2.0%), caryophyllene oxide (5.8%), ar-abietatriene (4.4%), and ar-abietatrienol (0.4%).

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698003

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The chemical composition of the flower concrete oil and leaf oil ofMichelia albahave both been examined by a combination of GC/MS and retention indices. Approximately 100 compounds were characterized in both oils, with linalool being the major component of the flower oil (72.8%) and the leaf oil (80.1%), respectively. The most abundant minor components of the flower oil were α-terpineol (6.04%), β-phenylethyl alcohol (2.58%), β-pinene (2.39%), methyl 2-methylbutyrate (1.46%), geraniol (1.23%), and 1, 8-cineole (1.03%). The most abundant minor components of the leaf oil were β-caryophyllene (3.0%), β-elemene (1.7%), caryophyllene oxide (1.68%), and nerolidol (1.19%). Over 70% of the components characterized in the oils were found as trace constituents (<0.05%). Enantiomeric separation using chiral GC revealed that the absolute configuration of linalool was (R)-75%: (S)-25% and (R)-95.3%: (S)-4.7% for flower oil and leaf oil, respectively.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698004

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The chemical composition of the leaf/inflorescence oil ofSeriphidium brevifolium(Wall.) Y. Ling et Y. R. Ling which was obtained from mature and immature plants collected in an inner valley of Kumaon Himalaya, was examined by GC/M S. Forty-six constituents were characterized in the “immature oil” and 63 constituents were identified in the “mature oil.” The main components of “immature oil” were α-thujone (77.0%), β-thujone (4.4%) and 1, 8-cineole (3.3%), while the “mature oil” possessed α-thujone (60.2%), β-thujone (5.5%) and 1, 8-cineole (1.5%). The reason for a preference for the use of the immature leaves/inflorescence as an incense over the mature leaves/inflorescence is thought to be due to the higher total thujone and 1,8-cineole content of the oil.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698005

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Analysis of the essential oils obtained by steam distillation of the leaves ofEucalyptus nova-anglicaDeane & Maiden by GC/MS reveals that this species exists in three chemotypic forms, all of which are characterized by the presence of large amounts of sesquiterpenes. Chemotype 1 contains large amounts of α-, β- and γ-eudesmol, chemotype 2 up to 80% nerolidol while chemotype 3 contains large amounts of aromadendrene and the related alcohol, globulol.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698006

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The essential oil ofMonanthotaxis capeafrom the Ivory Coast was analyzed by GC/MS. (E)- and (Z)-4-phenylbut-3-en-2-ol and their acetates were found to represent about 85% of the whole oil. It is the first time that these compounds have been found in such abundance in an essential oil. A biosynthetic pathway of these phenylbutane derivatives is proposed.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698007

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

A narcissus absolute, obtained by the hexane extraction of wild flowers grown in the “Massif Central” (France), has been investigated thoroughly. GC and GC/MS analysis of its volatile and olfactively important fractions has led to the identification of over 80 new minor constituents in addition to almost 200 components already known in the literature. Among these more than 20 contribute significantly to the complex floral notes of this absolute, which are reminiscent of jasmine, rose, violet, tuberose and orange flower.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698008

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The essential oil content and composition of sevenM. arvensisvar.piperascenscultivars were investigated over three years. The parameters varied both in relation to environmental factors, harvest time and genotype examined. The cultivars showed specific responses to environmental conditions. Four cultivars were selected for further work because of their similarity to commercial cornmint.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698009

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The essential oils ofPlectranthus incanusLink andClinopodium umbrosum(M. Bieb.) Koch, which were produced from plants collected in N.W. Himalayan region of India, were examined by GC/MS. Fourteen constituents were identified inP. incanusoil of which cis-piperitone oxide (35.70%) and piperitenone oxide (45.01%) were most predominant. Although only nine constituents were identified inC. umbrosumoil, cis-piperitone oxide (63.05%) and piperitenone oxide (17.98%) were found as major constituents.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698010

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

An improved technique is described for producing an actual and permanent record of the number and distribution of essential oil glands on the surface of leaves. A fresh leaf is pressed onto thermal printer paper in order to rupture the oil glands which then leave an image as black dots on the paper. This rapid and inexpensive technique is suitable for both laboratory and field usage.

ISSN:1041-2905    

DOI:10.1080/10412905.1992.9698011

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor