bluuebunny/crossref_metadata_2025_split huggingface dataset:
Constituents of the essential oil of Echinophora tenuifolia L. subsp. sibthorpiana (guss.) tutin from Turkey
Authors: Akgül Attila , Chialva Franco 
Published: November 2006

AbstractEchinophora tenuifolia L. subsp. sibthorpiana Guss. is a bushy plant widespread in most regions of Turkey. The composition of the essential oil obtained by steam distillation from aerial parts of the plant in full bloom was analyzed by capillary GLC and GLC‐MS. α‐Phellandrene was the main constituent of the oil (51.0%), followed by methyleugenol (24.8%), β‐phellandrene (5.0%) and p‐cymene (4.3%). Several trials, using different techniques, have confirmed the total absence of sesquiterpenes in the essential oil.
Extraction of essential oils by refining of plant materials. II. Processing of products in the dry state: Illicium verum Hooker (fruit) and Cinnamomum zeylanicum nees (bark)
Authors: Bernard Thierry , Perineau Francis , Delmas Michel , Gaset Antoine 
Published: November 2006

AbstractExtraction of Chinese star anise (Illicium verum Hooker) and cinnamon bark (Cinnamomum zeylanicum Nees) was studied by a new solvent extraction technique involving 1,1,2‐trichloro‐1,2,2‐trifluorethane. Thus useful yields of concrete were obtained (21% and 12% respectively). Hydro distillation of the concretes made it possible to obtain essential oils with yields similar to those obtained by direct hydro distillation of plant materials (9.5% and 1.1% respectively). GC‐MS analysis indicated that the composition of products obtained was similar to that of essential oils obtained by direct hydro distillation.
The volatile components of tinned black perigord Truffles Tuber melanosporum vitt
Authors: Talou Thierry , Delmas Michel , Gaset Antoine 
Published: November 2006

AbstractA dynamic headspace procedure based on cryogenic adsorption on Tenax GC trap followed by heat desorption was developed for isolating volatiles from tinned Black Perigord Truffles Tuber melanosporum. Vitt. The analysis carried out by HRGC‐MS allowed the identification of 36 volatile compounds reported for the first time in processed truffles. Although the major of identified compounds were previously characterized as fresh Black Truffle aroma components, the two flavours were described as very different.
New naturally occurring sesquiterpenes from Scotch spearmint oil (Mentha cardiaca Ger.)
Authors: Surburg H. , Köpsel M. 
Published: November 2006

AbstractThe composition of the redistillation residue of Scotch spearmint oil (type ‘midwest’, Mentha cardiaca Ger.) was investigated. In addition to a number of known sesquiterpene alcohols the new natural compounds β‐bourbonen‐13‐ol (1b) and endo‐1‐bourbonanol (2a) were identified, as well as l,5‐epoxysalvial‐4(14)‐ene (4) and its exo configurated isomer 5.
Variability in the monoterpenes of needles of Picea abies (L.) Karst
Authors: Schönwitz Roswitha , Merk Lydia , Ziegler H. 
Published: November 2006

AbstractThe monoterpenes from needles of 47 adult trees of Picea abies (L.) Karst., grown under natural conditions, were studied to get information about the tree‐to‐tree variation within three adjacent locations and the differences between the locations. For the absolute amounts of the monoterpenes the tree‐to‐tree variation ranged between 50% and 70%, expressed as the relative coefficient of variation. All three populations showed similar variations. When looking for different genotypes, at each location two groups of trees were observed, which were characterized by the ratio of myrcene to limonene.
Synthesis, identification and determination of glucosides present in green vanilla beans (Vanilla fragrans Andrews)
Authors: Leong G. , Uzio R. , Derbesy M. 
Published: November 2006

AbstractA preliminary study showed the presence of gluocovanillin and other glucosides in green vanilla beans (Vanilla fragrans Andrews). The glucosides of vanillin, vanillic acid, ρ‐hydroxybenzaldehyde and ρ‐hydroxybenzoic acid have now been synthesized and their structures confirmed by mass spectrometry and 13C‐NMR spectroscopy. A reversed phase (C‐18) HPLC method, using a photodiode array detector, enabled separation and characterization of the authentic substances and this method was applied to the determination of these glucosides in green vanilla bean extracts of various origin.
Additional volatile constituents of carambola (Averrhoa carambola L.) fruit
Authors: Frohlich Otmar , Schreier Peter 
Published: November 2006

AbstractThe volatiles of fresh carambola (Averrhoa carambola L.) were separated from the fruit pulp by high‐vacuum distillation and subsequent solvent extraction (pentane‐dichloromethane, 2:1). In three fractions obtained by preseparation of the concentrated extract with adsorption chromatography on silica gel (pentane‐diethyl ether gradient) the volatiles were analysed by capillary gas chromatography (HRGC) and combined capillary gas chromatography‐mass spectrometry (HRGC‐MS) as well as combined capillary gas chromatography‐FTIR spectroscopy (HRGC‐FTIR). Direct pentane‐dichloromethane extraction with subsequent liquid‐liquid distribution and diazomethane derivatization was used for separation of the volatile acids. In total, 126 aroma compounds were identified, of which 76 are reported for the first time as constituents of carambola fruit pulp. The major part of volatiles comprised esters and carbonyl compounds. Quantitative HRGC revealed (E)‐hex‐2‐enal (2.4 mg/kg) and methyl benzoate (1.9 mg/kg) as major aroma compounds.
Constituents of the essential oil of Monodora tenuifolia (Benth.) W. Ash root
Authors: Oguntimein Babajide , Ekundayo Olusegun , Laakso Into , Hiltunen Raimo 
Published: November 2006

AbstractThe volatile oil of the roots of Monodora tenuifolia (Benth.) W. Ash (Annonaceae) was analysed by means of gas chromatography and gas chromatography‐mass spectrometry. A total of 41 components were identified. The major components were two unidentified sesquiterpene hydrocarbons (15.3%) and three indole derivatives: 3‐prenylindole (5.6%), 6‐prenylindole (4.1%) and an unidentified indole derivative (5.6%). The essential oil contained predominantly sesquiterpenes (33.4%).
Composition of the essential oil of Salvia pisidica Boiss. et Heldr
Authors: Şarer E. 
Published: November 2006

AbstractThe chemical composition of the essential oil of Salvia pisidica Boiss. et Heldr., an endemic plant of southern Anatolia, was studied by GLC after liquid‐solid chromatography. The major components of the oil were sabinyl acetate, α‐and β‐thujone, 1,8‐cineole and camphor.
Aromatic plants of tropical Central Africa. II. A comparative study of the volatile constituents of Zanthoxylum leprieurii (Guill. et Perr.) Engl. and Zanthoxylum tessmannii Engl. leaves and fruit pericarps from the cameroon
Authors: Lamaty G. , Menut C. , Bessiere J. M. , Aknin M. 
Published: November 2006

AbstractThe essential oils of leaves and fruit pericarps of Zanthoxylum leprieurii (Guill. et Perr.) Engl. and Zanthoxylum tessmannii Engl. were analysed by GC and GC‐MS. Those obtained from Z. leprieurii contain only monoterpenoids, mostly hydrocarbons; terpinolene represents almost 50% of the leaf oil and trans‐β‐ocimene is predominant in the fruits (44%). Both contain fairly large amounts of A‐3‐carene (⋍14%). As with Z. leprieurii, Z. tessmannii gives volatile oils which contain mainly monoterpenoids, the oil distilled from the leaves containing only hydrocarbons; among them, α‐pinene (40.4%), myrcene (27.1%) and trans‐β‐ocimene (22.4%) are the most important. The composition of the fruit oil is more diverse, with a fairly large proportion of oxygenated products (⋍46%) among which citronellol, geraniol and their acetates are the most abundant.
Mass spectrometric identification of unsaturated terpene hydrocarbons by GC–MS after derivatization with trioxo(tert‐butylimido)osmium(VIII)
Authors: Rücker G. , Neugebauer M. , Daldrup B. 
Published: November 2006

AbstractThe mass spectrometric identification of unsaturated mono‐ and sesquiterpene hydrocarbons during the GC–MS analysis of essential oils is often difficult owing to lack of characteristic fragmentation patterns and because of isomerization and molecular rearrangements. Reaction of mono‐ and sesquiterpenes containing one or two non‐conjugated double bonds with trioxo(tert‐butylimido)osmium(VIII) gives vicinal monoamino alcohols, bisamino alcohols and aminotriols after reduction of the intermediate osmate ester amides. These derivatives show characteristic mass spectra which can be used as a ‘fingerprint’ for the identification of the respective parent compound. Moreover, it seems possible to derive some key fragments from the mass spectra, which can indicate the presence of certain types of alkenoic unsaturation in the hydrocarbon. This is true for vicinal disubstituted exocyclic double bonds, isopropenyl double bonds and methylsubstituted endocyclic double bonds.
Identification and sensory analysis of volatile constituents of babaco fruit (Carica pentagona heilborn)
Authors: Barbeni Massimo , Guarda Pier Antonio , Villa Mario , Cabella Paolo , Pivetti Franco , Ciaccio Filippo 
Published: November 2006

AbstractThe volatile constituents of babaco fruit (Carica pentagona Heilborn) were investigated. Two different methods of isolation of the volatiles were employed: (a) reduced pressure steam distillation followed by dichloromethane extraction: (b) direct extraction of filtered babaco pulp with diethyl ether. HPLC fractionation of the extracts was carried out. The extracts were analysed by dual capillary gas chromatography and combined capillary GC‐MS. The identified volatiles included 9 hydrocarbons, 20 alcohols, 9 carbonyls, 9 acids, 60 esters, 3 lactones, 2 sulphur and 7 miscellaneous components. Quantitative analysis of the major components (butan‐1‐ol and hexan‐1‐ol) showed similar results for the two isolation methods. Combined GC‐sensory analysis was carried out: of the 21 main odours detected, 18 were tentatively assessed by linear retention index comparison with authentic chemical standards. The aroma of babaco appears to be due to the collective effect of a number of components.
Steam volatile leaf oils of Melaleuca globifera R. Br., M. lateriflora benth., M. symphyocarpa f. Muell. and M. uncinata R. Br.
Authors: Brophy Joseph J. , Lassak Erich V. , Boland Douglas J. 
Published: November 2006

AbstractThe volatile leaf oils of Melaleuca globifera R. Br., M. lateriflora Benth., M. symphyocarpa F. Muell. and M. uncinata R. Br., isolated by steam distillation, were analysed by GC–MS. All oils were entirely terpenoid with 1,8‐cineole as their main component. M. uncinata exists in several chemical varieties which can be distinguished according to their 1,8‐cineole and eudesmol contents.
Composition of the herb essential oil of Hyptis spicigera Lam.
Authors: Onayade O. A. , Looman A. , Scheffer J. J. C. , Svendsen A. Baerheim 
Published: November 2006

AbstractThe essential oil isolated from aerial parts of Hyptis spicigera Lam., used for example in baths in northern Nigeria, was analysed by capillary GC. Forty‐three components of the oil were identified, among which many occurred in small quantities. The identity of the components was confirmed by GC–MS using an ion trap detector. The oil was characterized by a high content of β‐caryophyllene (68%) and the presence of C16 and C18 fatty acid methyl esters. The present paper describes the analysis of the essential oil of H. spicigera, family Lamiaceae, grown in Nigeria. Neither phytochemical nor pharmacological studies on the plant have been reported previously.
Volatile flavour components of glycyrrhizae radix (Glycyrrhiza glabra L. var. glandulifera Regel et Herder) from China
Authors: Miyazawa Mitsuo , Kameoka Hiromu 
Published: November 2006

AbstractThe composition of the volatile oil of Kanzou from Glycyrrhiza glabra L. var. glandulifera Regel et Herder growing in northeast China has been investigated by capillary GC, GC–MS and 1H‐NMR. The oil contained 81 volatile components of which 35.0% were terpenoid. The main constituents were octanoic acid (11.4%), paeonol (8.9%), octadecane (8.6%), benzaldehyde (7.5%), α‐terpineol (7.5%) and 4‐terpineol (7.2%).
Parthenolide and other volatiles in the flowerheads of Tanacetum parthenium (L.) Schultz Bip.
Authors: Banthorpe D. V. , Brown G. D. , Janes J. F. , Marr I. M. 
Published: November 2006

AbstractExtracts of the flowerheads of Tanacetum parthenium (L.) Schultz Bip. were analysed by gas chromatography‐mass spectroscopy (GC–MS). Those components that could not be matched with MS data banks were isolated by column chromatography/HPLC and then characterized by 1H‐NMR. Extracts of the leaves and roots were subjected to a similar but less detailed examination for purposes of comparison which revealed that the flowerheads contained more than four times the quantity of the pharmacologically active sesquiterpene parthenolide than the leaves. Thirty‐nine other compounds (mostly terpenoids) were characterized.
Structure‐odour correlation, part XII1: Dehydrotheaspirane analogues
Authors: Weyerstahl Peter , Meisel Thomas 
Published: November 2006

AbstractFrom isophorone (1) and camphor (2) the spiro ethers 3–8 were prepared via the yne‐diols 12–17 and the ene‐diols 18–23. The attempted ring closure of 21 and 22 with KHSO4 furnished only the carbonyl compounds 24 and 25. Under these conditions 23 gave a mixture of the isomers 8a and 8b. Olfactive evaluation showed that the odour goes stepwise with increasing substitution at C‐2 (3 → 4 → 5) or C‐5′ (6 → 7 → 8) from harsh, camphoraceous to fruity and finally nutty, woody notes. These sensations are comparable with those of the dehydrotheaspiranes (type B) showing that the methyl groups in a position to the osmophoric oxygen atom are particularly important for the odour profile. The strongly hindered interaction of the ether atom of 8a with the receptor in comparison to the situation of the isomer 8b effects a great difference in both odour quality and quantity of these isomers.
Essential oils of plants from Hispaniola: 5. the volatile leaf oil of Lepechinia uvbanii (briq.) epling (lamiaceae)
Authors: Zanoni Thomas A. , Adams Robert P. 
Published: November 2006

AbstractThe essential oil from the leaves of Lepechinia urbanii (Briq.) Epling from the Dominican Republic is dominated by δ‐car‐3‐ene (32.55%), δ‐copaene (13.82) and δ‐cadinene (12.51) with lesser amounts of β‐phellandrene (4.54), γ‐cadinene (3.41) and allo‐aromadendrene (2.83). Fifty‐six of 59 components were identified. Oil yield was 0.46 g/100g fresh weight (0.46%).
Variation of essential oil constituents in Vitex trifolia species
Authors: Suksamrarn Apichart , Werawattanametin Kittipong , Brophy Joseph J. 
Published: November 2006

AbstractThe major monoterpenes found in Vitex trifolia L. leaf oil were 1,8‐cineole, terpinyl acetate, sabinene and α‐pinene, whereas the major sesquiterpene was caryophyllene. In V. trifolia L. var. simplicifolia Cham, leaf oil the major monoterpenes were 1,8‐cineole, α‐pinene, terpinyl acetate and sabinene, but the sesquiterpenes identified in V. trifolia were completely absent in this oil.
New sulphur components of rose oil
Authors: Omata Akihiko , Yomogida Katsuyuki , Nakamura Shoji , Ota Tadao , Toyoda Takaaki , Amano Akira , Muraki Shigeru 
Published: November 2006

AbstractNew sulphur compounds in Bulgarian rose essential oil were investigated as follows: the steam distilled oil of the rose petals was fractionated by distillation, column chromatography and high‐performance liquid chromatography. GC and GS‐MS were employed for identification.In this analysis, 16 sulphur compounds were identified, and n‐butyl methyl disulphide, dimethyl trisulphide, n‐hexyl methyl disulphide, 3‐(4‐methylpent‐3‐enyl)thiophene, 3‐methyl‐2‐(3‐methylbut‐2‐enyl)thiophene, 3‐(4,8‐dimethyl‐nona‐3,7‐dienyl)thiophene, α‐mintsulphide, 4‐(4‐methylpent‐3‐enyl)‐1,2‐dithiacyclohex‐4‐ene, 1,2‐epithiohumulene, 4,5‐epithiohumulene and 4,5‐epithiocaryophyllene were identified for the first time in rose oil. These compounds were found to contribute significantly to the odour of rose essential oil.
Analysis of the essential oil of Zingiber cassumunar Roxb. from Indonesia
Authors: Taroeno  , Brophy J. J. , Zwaving J. H. 
Published: November 2006

AbstractThe composition of the essential oil of Zingiber cassumunar Roxb. from Indonesia was examined by GC and GC‐MS. A major part of the oil consists of monoterpenes with sabinene and terpinen‐4‐ol as main constituents. Sesquiterpenes accounted for a small part of the oil with sesquiphellandrene being the principal constituent. In addition to these terpenes the oil contains a number of phenylbutanoids. The essential oil obtained by hydrodistillation contained about 25 % of these phenylbutanoids whereas the oil obtained by extraction with light petroleum had about 46 %, with trans‐l‐(3,4‐dimethoxyphenyl)but‐l‐ene, trans‐l‐(3,4‐dimethoxyphenyl)butadiene and trans‐4‐(3,4‐dimethoxyphenyl)but‐3‐ene‐l‐yl acetate as the main constituents.
Structure‐odour correlation, part XIV: Aldol reaction of acyl furans to α, β‐unsaturated furanyl ketones (naginata ketone analogues) and their olfactive properties
Authors: Weyerstahl Peter , Schulze Matthias 
Published: November 2006

AbstractStarting from the acylfurans la‐4a by aldol reaction of the Mukaiyama type the aldols lc, If, 2c, 2e, 2f, 3d, 3f, 4d, were prepared via the silyl enol ethers lb‐4b. Dehydration of the aldols gave the α, β‐unsaturated ketones lg, lj, 2g, 2i, 2j, 3h, 3j. Their olfactive properties are described. The 2‐acyl‐5‐methylfurans 2g, 2i, 2j exhibit the most pleasant odours.
Hydroformylations of some monoterpenes and sesquiterpenes from essential oils
Authors: Chalchat J. C. , Garry R. Ph. , Lecomte E. , Michet A. 
Published: November 2006

AbstractHydroformylation in the presence of tris(triphenylphosphine)rhodium carbonyl hydride RhHCO(PPh3)3 was performed on selected terpenes: terpinolene, S(—)limonene, α‐ and β‐cedrenes, α‐ and β‐caryophyllenes and caryophyllene oxide. Except for terpinolene, in which only the trisubstituted endocyclic bond was hydroformylated. the double bonds affected were always exocyclic. These new fragrant compounds may be of use in perfumery.
Composition of the essential oil of Egyptian Cupressus sempervirens L. cones
Authors: Kassem F. F. , Harraz F. M. , El‐Sebakhy N. A. , De Pooter H. L. , Schamp N. M. , Abou‐Shleib H. 
Published: November 2006

AbstractThe essential oil of Cupressus sempervirens L. cones, prepared by steam distillation, was analysed by GC and GC‐MS. Forty‐nine compounds were identified, accounting for 98.8% of the oil. Its antimicrobial activity was tested against Staphylococeus aureus, Escherichia coli and Candida albicans.
Essential oils from the leaves of three Pistacia species grown in Egypt
Authors: De Pooter H. L. , Schamp N. M. , Aboutabl E. A. , El Tohamy S. F. , Doss S. L. 
Published: November 2006

AbstractEssential oils of leaves of Pistacia khinjuk Stocks, P. chinensis Bunge and P. lentiscus L., prepared by hydrodistillation, and studied by GC and GC‐MS, showed qualitative and quantitative differences. All three were found to be rich in monoterpene hydrocarbons. In P. lentiscus 4% sesquiterpene alcohols were found, and no monoterpene alcohols, whereas in P. khinjuk and P. chinensis 16% and 8% monoterpene alcohols respectively were detected, and no sesquiterpene alcohols.
Chemical composition of the essential oils from the gum and from various parts of Pistacia lentiscus l. (mastic gum tree)
Authors: Boelens Mans H. , Jimenez Rafael 
Published: November 2006

AbstractThe chemical composition of the essential oils isolated by extraction of mastic gum and by hydrodistillation from leaves, and unripe and ripe fruits of Pistacia lentiscus L. was studied. Up to 250 constituents were detected in the oils. From these components, about 90 could be identified and quantified, comprising over 95% of the oils. The gum oil contained 90% monoterpene hydrocarbons, and the leaf oil 50% monoterpene hydrocarbons, 20% oxygen‐containing monoterpenes and 25% sesquiterpenes, whereas the fruit oils consisted of 90–96% monoterpene hydrocarbons and 2–3% sesquiterpenes. The main constituents of the gum oil were: 79% α‐pinene and 3% β‐myrcene; of the leaf oil: 11% α‐pinene and 19% β‐myrcene; of the unripe‐fruit oil: 22% α‐pinene and 54% β‐myrcene, and of the ripe‐fruit oil: 11% α‐pinene and 72% β‐myrcene. α‐Terpineol and terpinen‐4‐ol (together 15%) were the dominant monoterpene alcohols in the leaf oil. Undecan‐2‐one (0.1–0.6%) seems to be an olfactively important constituent of the oils. Dimyrcene (four isomers) occurred (0.5‐4.4%) in all the oils.
Polynuclear aromatic compounds and other constituents of the herb essential oil of Salvia coccinea juss. ex murr.
Authors: Onayade O. A. , Scheffer J. J. C. , Svendsen A. Baerheim 
Published: November 2006

AbstractThe essential oils from herb samples of Salvia coccinea Juss. ex Murr. were analysed by GLC, LSC and GC‐MS. The plant material was collected from the same location in Ile‐Ife, Nigeria, in three consecutive years. About 40 components including polynuclear aromatic compounds and their alkyl derivatives were identified in some oil samples. Their major components were acenaphthene (18%), trans‐hex‐2‐enal (11%) and globulol (11%) in 1987, globulol (65%) and aromadendrene (11%) in 1988, and 2,5‐dimethoxy‐p‐cymene (29%) and globulol (16.5 %) in 1989. The polynuclear aromatic compounds detected most likely originate in the plants.
The needle essential oil of norwegian mountain juniper, juniperus communis L. var. Saxatilis Pall
Authors: Looman Anja , Svendsen Anders Baerheim 
Published: November 2006

AbstractThe needle essential oil of Norwegian mountain juniper, Juniperus communis L. var. saxatilis Pall., was investigated by headspace capillary gas chromatography. The average ratio of α‐pinene: sabinene: limonene was generally 21:45:5 (n = 25). However, at two rather cold and weatherbeaten habitats some shrubs were found with quite different ratios of these compounds, viz. 42:24:7 (n = 1) and 51: > 1:24 (n = 5), and 82: > 1:4 (n = 2) and 53:20:2 (n = 3), respectively.
The essential oil of Satureja parnassica heldr. & sart. ex boiss subsp. Sipylea P. H. Davis
Authors: Tümen G. , Sezik E. , Baser K. H. C. 
Published: November 2006

AbstractThe volatile constituents of Satureja parnassica Heldr. & Sart. ex Boiss subsp. sipylea P. H. Davis (Lamiaceae) were studied for the first time. 47 Compounds, out of 67 detected, have been identified by means of capillary GC and GC‐MS. The identified components represent about 95.5% of the oil. The major constituents found were carvacrol (49.9%) and p‐cymene (20.1%). In addition 33.7% terpene hydrocarbons, 6.4% monoterpenic alcohols, and 1.6% sesquiterpene hydrocarbons were present.
Essential oil analysis of sideritis pauli Pau
Authors: Burzaco A. , Velasco‐Negueruela A. , Pérez‐Alonso M. J. 
Published: November 2006

AbstractThe essential oil from two samples of Sideritis pauli Pau has been studied by GC, GC‐MS and IR after preparative GC. Forty‐two components have been identified in the volatile oils, and α‐pinene (48.0%) is the major one.
Study of the chemical composition of the essential oil, oleoresin and its volatile product obtained from ambrette (abelmoschus moschatus moench) seeds
Authors: Cravo L. , Périneau F. , Gaset A. , Bessière J. M. 
Published: November 2006

AbstractA comparison of the chemical compositions of the essential oil, the oleoresin and the volatile product of the oleoresin of ambrette seeds (Abelmoschus moschatus Moench) is reported for the first time. The three samples have been investigated by OC‐MS and are similar. The main difference is the lack of the alcoholic compounds (aliphatic alcohols and farnesols) in the oleoresin.