bluuebunny/crossref_metadata_2025_split huggingface dataset:
The essential oil of Artemisia judaica L. chemotypes
Authors: Ravid Uzi , Putievsky Eli , Katzir Irena , Carmeli Dafna , Eshel Amram , Schenk Hans Peter 
Published: November 2006

AbstractThe composition of the essential oils of Artemisia judaica L. from southern Israel (Negev) and from the Sinai was investigated by means of GC and GC‐MS. Artemisia ketone and artemisia alcohol were predominant in two different Negev oil types, while piperitone was the major constituent of oils of A. judaica from the Sinai. The main difference between the chemotypes is the absence of most of the artemisyl‐skeleton type compounds from the Sinai populations.
Composition of the essential oil from the leaves of buddleia asiatica lour
Authors: Garg S. C. , Dengre S. L. 
Published: November 2006

AbstractBuddleia asiatica Lour. (Loganiaceae) is distributed throughout India. The essential oil, obtained from the shade‐dried leaves of the plant by hydrodistillation in a yield of 0.3%, has been analysed by chromatographic spectroscopic and chemical methods. Eighteen components including various monoterpenoids and sesquiterpenoids were characterized and measured by area normalization. The oil has been found rich in β‐caryophyllene oxide (21.7%), citronellol (16.7%) and β‐caryophyllene (15.8%). Five minor components (3.1%) remained uncharacterized. The oil has been found to possess good in vitro antifungal, antibacterial and anthelmintic activity.
Seasonal Variation in the Composition of the Essential Oil of Crithmum maritimum L.
Authors: Barroso José G. , Pedro Luis G. , Figueiredo A. Cristina , Pais M. Salomé. S. , Scheffer Johannes J. C. 
Published: November 2006

AbstractThe seasonal variation in the composition of the essential oil of seafennel, Crithmum maritimum L., was studied by GC and GC‐MS. Monoterpenes were found to be the major components of the oil, amounting to 97%. The sesquiterpenes were present in a relatively small amount, constituting up to 2% of the total oil.Although all monoterpenes showed fluctuations in their relative amounts, the most conspicuous ones were recorded for sabinene (7‐42%) and γ‐terpinene (26‐55%). For the sesquiterpenes and for dillapiole, the only substituted phenylpropane derivative identified in this oil, of which the concentration ranged from 0.1% to 7%, no defined pattern of fluctuation was observed.
Essential oils of endemic thymus species from Portugal
Authors: Salgueiro Lígia M. Ribeiro 
Published: November 2006

AbstractIn Portugal there are four endemic ‘taxa’ of Thymus: Th. villosus L. subsp. villosus, Th. lotocephalus G. López & R. Morales, Th. camphoratus Hoffmanns. & Link and Th. capitellatus Hoffmanns. & Link.As a contribution to better knowledge, keys with taxonomic features and chemical composition of their essential oils are given.It was possible to describe some chemotypes of those taxa for the first time.
Chiral compounds of essential oils. Part XI. Simultaneous stereoanalysis of lavandula oil constituents
Authors: Kreis Peter , Mosandl Armin 
Published: November 2006

AbstractEnantioselective multidimensional gas chromatography using the column combination Carbowax 20 M/heptakis‐(2,3‐di‐O‐acetyl‐6‐O‐tert‐butyldimethylsilyl)‐β‐cyclodextrin in OV 1701‐vinyl allows the simultaneous stereodifferentiation of trans‐ and cis‐linalol oxides (furanoid), camphor, octan‐3‐ol, oct‐1‐en‐3‐ol, linalyl acetate, lavandulol, terpinen‐4‐ol and linalol. The method is applied to commercially available as well as self‐prepared essential oils of Lavandula species. Chirality evaluation is discussed in view of quality assessment of these essential oils.
Determination of the enantiomeric composition of citronellol in essential oils by chiral GC analysis on a modified γ‐cyclodextrin phase
Authors: Ravid Uzi , Putievsky Eli , Katzir Irena , Ikan Raphael , Weinstein Vera 
Published: November 2006

AbstractThe enantiomeric composition of citronellol (trifluoroacetyl derivative) was determined on a commercially available fused‐silica chiral capillary column, Lipodex E. Laboratory‐made geranium Bourbon oils yielded higher enantiomeric excesses of (–)‐citronellol than commercial Bourbon oils, and than Egyptian‐type oils. In addition high enantiomeric excesses of (–)‐citronellol from rose oil and (+)‐citronellol from citronella oil were detected.
Variations in the essential oil of artemisia judaica L. Chemotypes related to phenological and environmental factors
Authors: Putievsky Eli , Ravid Uzi , Dudai N. , Katzir Irena , Carmeli Dafna , Eshel Amram 
Published: November 2006

AbstractThe essential oil content and compositon of Artemisia judaica L. from the Sinai Peninsula (Egypt) and the Negev Desert (southern Israel) are related to a variety of factors such as season, plant age, and different plant parts. Differences were found also from samples collected at various locations.The contents fluctuated with the season, reaching the highest level during the late summer. Seasonal variations in the essential oil content occur one month earlier in Sinai plants than in Negev plants. The essential oil content in the leaves is higher than in the branches and flowers. No differences were found in the relative percentage of the components in the essential oil from different plant parts.Essential oil of A. judaica plants from the two regions was of two distinct chemotypes. An artemisyl‐oil type was predominant in the Negev samples, while a piperitone‐oil type was predominant in those collected in southern Sinai. These differences were evident in samples collected in the wild in all seasons, over a period of two years. Seedlings grown in a controlled environment, from seeds collected in the two regions, exhibited the same differences. It is, therefore concluded that these differences reflect genetic differences between the two populations.
Enantiomeric 2‐methylbutanoates: Sensory evaluation and chirospecific analysis
Authors: Karl Volker , Schumacher Katja , Mosandl Armin 
Published: November 2006

AbstractPhenolic 2‐methylbutanoates are known to be characteristic components of various essential oils, but their optical purity is not known. Enantiomeric pseudoisoeugenyl 2‐methylbutanoates have been synthesized and their sensory properties are found to depend on the optical and geometrical isomerism of the components investigated. Furthermore, (S)‐2‐methylbutanoates have been detected as the genuine esters from Pimpinella anisum (L.), Arnica (unknown splecies) and Pimpinella saxifraga (L.), using ester hydrolysis and subsequent enantioselective MDGC analysis of the corresponding 2‐methylbutanoic acid.
Headspace analysis of the dried herb of passion flower (Herba Passiflorae) and dried flowers of lime tree (Flores Tiliae)
Authors: Buchbauer Gerhard , Jirovetz Leopold , Remberg Barbara , Remberg Gerd , Nikiforov Alexej 
Published: November 2006

AbstractThe headspace of the dried herb of Passiflora incarnata L. (Passifloraceae) and that of the officinal lime tree drug (comprising of the dried flowers of Tilia cordata Mill. and/or T. platyphyllos Scop.; Tiliaceae) were investigated by GC, GC‐MS and GC‐FTIR. As main compounds of the headspace of P. incarnata limonene, cumene, α‐pinene, prezizaene, zizaene and zizanene, and of the headspace of lime tree flowers p‐cymene, fenchone, α‐thujone, β‐thujone, camphor, anethole and menthone were identified by GC retention time correlations and by their mass and/or IR spectra. Additionally, information on the odour impression of the headspace samples, and data obtained by a sniffing technique are given. No single compound has been found to be responsible on its own for the typical odour of these drugs.
On the genuineness of citrus essential oils. Part XL. The composition of the coumarins and psoralens of Calabrian bergamot essential oil (Citrus bergamia Risso)
Authors: Mondello Luigi , Stagno d'Alcontres Ildefonsa , Del Duce Rosa , Crispo Francesco 
Published: November 2006

AbstractThe content of bergamottin, 5‐geranyloxy‐7‐methoxycoumarin, citropten and bergapten in Calabrian bergamot essential oil was determined by HPLC. 128 genuine bergamot essential oils, cold‐pressed during the year 1992, were analysed; for each sample the date and area of production of the fruits is known.The percentage of bergamottin ranges between 1.02% and 2.75%. 5‐geranyloxy‐7‐methoxycoumarin between 0.08 and 0.22%, citropten between 0.14% and 0.35%, bergapten between 0.11 and 0.32%. The mean content of bergamottin and 5‐geranyloxy‐7‐methoxycoumarin did not vary during the production period, while that of citropten and bergapten decreased considerably from January to March. There does not seem to be any evident correlation between the production areas of the fruits and the coumarin composition. The presence of some peaks absent in genuine bergamot essential oils, has been detected in three bergamot oils, available on the market, probably because of lime oil addition.
The EC flavour directive and the worldwide harmonization of flavour regulations
Authors: van Berge P. 
Published: November 2006

AbstractAfter an introductory note on the development of food and food risks, a short historical overview is presented on the implementation of flavour regulations in the United States and the European Community. With the emergence of global markets the establishment of global inventories of flavouring materials and adjuncts is proposed which should be reviewed by an Independent Global Expert Panel.
Volatiles formed during extrusion cooking of cereals
Authors: Pfannhauser W. 
Published: November 2006

AbstractTriticale (Triticum durum × Secale) has been investigated as an unusual cereal for new types of extruded foodstuffs. High‐pressure, high‐temperature short‐time extrusion cooking of whole‐grain cereals causes the formation of different volatiles, some of which have characteristic flavour notes. Combined sensorial‐analytical techniques such as GC‐sniffing analysis and instrumental‐analytical methods (GC‐MS) have been used for identification of the powerful flavour substances. Two main groups of volatile substances have been identified: firstly compounds originating from the lipids of the germ by oxidation processes (e.g. hexenal, hexanol); secondly pyrazines formed by reactions of proteins and starch. Until now there are only a few reports on the volatiles formed by extrusion cooking available in the literature. By comparison with flavour compounds of fresh bread, some substances which are possibly precursors of bread flavour have been identified and characterized.
The volatile constituents of Acinus alpinus (L.) Moench ssp. meridionalis (Nyman) P. W. Ball growing in Spain
Authors: Velasco‐Negueruela Arturo , Pérez‐Alonso María José , Jiménez Salvador Mesa , García Felipe Martínez 
Published: November 2006

AbstractAnalysis of two samples of the oil of Acinus alpinus (L.) Moench subsp. meridionalis (Nyman) P. W. Ball revealed the following composition: monoterpene hydrocarbons (6.1%, 14.1%), oxygenated monoterpenes (1.7%, 1.9%), sesquiterpene hydrocarbons (83.1%, 79.3%) and oxygenated sesquiterpenes (9.1%, 4.7%). The main constituents found were germacrene‐D (56.8%, 43.2%), trans‐β‐caryophyllene (6.2%, 15.4%) and bicyclogermacrene (5.9%, 11.7%).
Chiral compounds of essential oils. Part XIII. Simultaneous chirality evaluation of geranium oil constituents
Authors: Kreis Peter , Mosandl Armin 
Published: November 2006

AbstractThe chiral monoterpenoids cis/trans rose oxides, mennthone, isomenthone, linalol, α‐terpineol and citronellol are stereoanalysed simultaneously, using enantioselective multidimensional gas chromatography (enantio‐MDGC) and the column combination polyethylene glycol/heptakis(2,3‐di‐O‐acetyl‐6‐O‐tert‐butyldimethylsilyl)‐β‐cyclodextrin in OV 1701‐vi.The method is applied to the chirality evaluation of these monoterpenoids from geranium oils of different origin. The enantiomeric ratios are discussed in view of the origin assessment of geranium oils.
Profiles of essential oils of new Citrus hybrids
Authors: Ruberto Giuseppe , Biondi Daniela , Piattelli Mario , Rapisarda Paolo , Starrantino Angelo 
Published: November 2006

AbstractThe chemical composition of the essential oils of seven new citrus hybrids, obtained by crossbreeding grapefruit with clementine, was analysed by GC–MS. A total of 58 components were detected, 48 of them fully characterized. Limonene is consistently the main component of all the essential oils of the hybrids and the parents. Hybrid–hybrid and parent–hybrid differences in oil composition are reported. Variations during the fruit development of the percentage of six classes (non‐oxygenated monoterpenes, oxygenated monoterpenes, sesquiterpenes, aliphatic aldehydes, aliphatic alcohols, and esters) representing the minor components are also described.
Chemical composition of the essential oil of Ageratum conyzoides L. (Asteraceae) from Réunion
Authors: Vera Robert 
Published: November 2006

AbstractThe essential oil of Ageratum conyzoides L. (Asteraceae) growing in Reunion (Indian Ocean) was investigated using capillary GC and GC–MS. Two main components 7‐methoxy‐2,2‐dimethylchromene (Precocene I) and β‐caryophyllene, a large number of terpenoids and some chromenes are reported. Two new compounds, coumarin and phytol (a diterpene alcohol), were identified.
Essential oil composition of Tagetes ternifora H.B.K. and Tagetes laxa Cabrera
Authors: Zygadlo J. A. , Abburra R. E. , Maestri D. M. , Guzman C. A. , Grosso N. R. , Espinar L. Ariza 
Published: November 2006

AbstractThe volatile oils of Tagetes terniflora H.B.K. and T. laxa Cabrera from wild populations growing in mountainous regions of Argentina were examined. The main monoterpenes of both species were β‐ocimenes, tagetones and tagetenones.
The essential oils of two endemic Teucrium species from Madeira: T. abutiloides L'Hér. and T. betonicum L'Hér
Authors: Barroso José G. , Pedro Luís G. , Figueiredo A. Cristina , Antunes Teresa , Sevinate‐Pinto Isabel , Scheffer Johannes J. C. 
Published: November 2006

AbstractThe essential oils isolated by hydrodistillation from aerial parts of Teucrium abutilodes L'Hér. and of T. betonicum L'Hér. were obtained in almost similar yields (<0.5%). The oils were complex mixtures consisting mainly of sesquiterpene hydrocarbons, which amounted to 55% of the oil of T. abutiloides and to 45% of that of T. betonicum. However, large differences, both qualitative and quantitative, were observed with regard to the fraction of sesquiterpenes of these oils. Germacrene‐D (13%) and δ‐cadinene (11%) were the most abundant sesquiterpenes in the oil of T. abutiloides, and β‐caryophyllene (12%) in that of T. betonicum. Oct‐l‐en‐3‐ol was the main component of both oils (20% of the oil of T. abutiloides and 24% of that of T. betonicum).
Chemotaxonomic characterization of a Thymus hybrid from Portugal
Authors: Salgueiro Lígia R. , da Cunha A. Proença , Paiva Jorge 
Published: November 2006

AbstractThymus × viciosoi (Pau) Morales (= Th. bracteatus forma viciosoi Pau; Th. Variabilis Hoffmanns. et Link) is a hybrid of Th. Pulegioides L. and Th. Zygis L. ssp. zygis, which was not known to occur in Portugal but was recently collected in the Serra da Nogueira, the northeastern mountainous region of this country.The hybrid showed intermediate morphological features of the parental species: hairy stems only on the angles and some leaves not revolute, with globular glands beneath, which are typical features of Th. Pulegioides; or some leaves revolute, calyx 3–4 mm long, with the superior teeth up to 1 mm, not ciliate, and the calyx‐tube 1.5–2 mm long, which are features of Th. zygis ssp. Zygis.The essential oil of the hybrid also possessed an intermediate composition compared with those of the parents. In that area of Portugal, the oil of Th. pulegioides is of a thymol‐type and the oil of Th. zygis ssp. Zygis is of a carvacrol‐type. The essential oil of the hybrid is a thymol/carvacrol‐type oil.
Essential oils from some lavandula hybrids growing spontaneously in north west italy
Authors: Peracino V. , Caramiello R. , Maffei M. 
Published: November 2006

AbstractEssential oils were isolated from several Lavandula hybrids growing spontaneously in the north‐west Italian Alps. GC analyses were carried out to determine the percentage composition of the oils. The data obtained were statistically processed in order to partition the natural hybrids according to their oil composition. The results showed the presence of five distinct groups of plants characterized by high linalol, linalyl acetate, cis‐linalol oxide, trans‐linalol oxide, 1,8‐cineole, camphor and germacrene‐D contents in their oils.
Composition of the leaf essential oil from vepris heterophylla R. let.
Authors: Moulis C. , Fouraste I. , Keita A. , Bessiere J. M. 
Published: November 2006

AbstractThe volatile constituents of the leaves of Vepris heterophylla R. Let. (Rutaceae), were studied for the first time. Thirty‐three compounds, out of the forty‐four detected, were identified by means of capillary GC and GC‐MS. The C12 hydrocarbons, geijerene and pregeijerene (together about 20%), are the main constituents.
Headspace analysis of hyacinth flowers
Authors: Brunke E.‐J. , Hammerschmidt F.‐J. , Schmaus G. 
Published: November 2006

AbstractThe volatiles of white hyacinths were isolated by dynamic headspace trapping. More than 70 constituents could be identified by GC and GC‐MS. The principal constituents were benzyl acetate and (E, E)‐α‐farnesene. Beside these, sensorily important substances like indole, oct‐1‐en‐3‐ol and phenylacetaldehyde were identified. Minor traces of three substituted pyrazines could be detected by GC‐sniffing. The advantages of the simultaneous “closed‐loop stripping” technique using various adsorbing agents at the same time were demonstrated. By this means artefact formation and discrimination of individual components could be determined.
Volatile leaf oils of some south‐western and southern australian species of the genus eucalyptus. Part II—Subgenus symphyomyrtus, section dumaria, series torquatae
Authors: Bignell C. M. , Dunlop P. J. , Brophy J. J. , Jackson J. F. 
Published: November 2006

AbstractThe volatile leaf oils of Eucalyptus melanoxylon Maiden, E. brachycalyx Blakely, E. rugosa R. Br. ex Blakely, E. griffithsii Maiden, E. concinna Maiden & Blakely, E. corrugata Luehm., E. torquata Luehm. and E. pimpiniana Maiden, isolated by vacuum distillation, were analysed by GC–MS. All species contained α‐pinene (6–39%), α‐pinene (3–10%), 1,8‐cineole (7–30%), p‐cymene (2–17%), aromadendrene (0.5–9%), trans‐pinocarveol (1‐11%) and β‐eudesmol (0.5–10%) as principal leaf oil components.
The essential oil from leaves of salvia canariensis L
Authors: Cañigueral Salvador , Iglesias José , Vila Roser , Virgili Albert , Ibáñez Carles 
Published: November 2006

AbstractThe composition of the essential oil of the leaves of Salvia canariensis L. obtained by hydrodistillation was investigated by GC–FID, GC–MS and GC–FTIR. The main constituents of the oil were the sesquiterpenes β‐caryophyllene (30%) and globulol (17%), together with the monoterpenes bornyl acetate (17%), α‐pinene (10%) and camphene (8%). The structure of globulol was assigned using IR, mass and mainly NMR spectroscopy, after isolation of the compound by column chromatography. The assigned NMR data of globulol are given.
Composition of the essential oil of artemisia argentea l′hér., an endemic species of the madeira archipelago
Authors: Figueiredo A. Cristina , Barroso José G. , Pedro Luis G. , Fontinha Susana S. , Looman Anja , Scheffer Johannes J. C. 
Published: November 2006

AbstractThe composition of the essential oils from different aerial parts of Artemisia argentea L'Hér. was analysed by GC and GC‐MS. The oils were isolated separately from flower heads, and from leaves collected during the flowering period and the vegetative phase of the plant. The composition of the oils did not differ to a large extent. The three oil samples consisted mainly of monoterpenes (67–73%). α‐Phellandrene (25–27%) was the dominant component of the oils analysed, while isopinocamphone (cis‐3‐pinanone; 7–12%) was the second most important monoterpene. The sesquiterpene fraction amounting to 21–27% of the oils, was dominated by β‐caryophyllene (5–8%) and β‐eudesmol (8% in each oil sample).
Constituents of the essential oil of blumea brevipes (oliv. & hiern) willd
Authors: Mwangi J. W. , Achola K. J. , Lwande W. , Hassanali A. , Laurent R. 
Published: November 2006

AbstractThe composition of the essential oil of Blumea brevipes (Oliv. & Hiern) Willd. isolated by hydrodistillation was analysed by GC and GC‐MS. Sixty‐eight compounds constituting about 94% of the oil were identified. The main components were terpinen‐4‐ol (27.6%), germacrene‐D (15.4%), sabinene (8.0%) and α‐terpinene (5.5%). The essential oil composition of B. brevipes presented here (terpinenol‐germacrene‐type) is different from that of other Blumea/Laggera species.
Volatile constituent of the liverwortchiloscyphus pallidus(mitt.) engel & schuster
Authors: Toyota Masao , Asakawa Yoshinori 
Published: November 2006

AbstractThe stem‐leaf liverwort,Chiloscyphus pallidus(Mitt.) Engel & Schuster (Jungermanniales) emits an intense smell reminiscent of the stink bug (Pentatomidae). An ether extract of this species which was collected in New Zealand, was analysed by GC‐MS. The major constituent was identified as (E)‐dec‐2‐enal by spectral data of its 2,4‐dinitrophenylhydrazone and oxime‐tert‐butyldimethylsilyl derivatives. The stereochemistry was decided astransby1H‐NMR decoupling experiments of the 2,4‐dinitrophenylhydrazone. Although it is well known that the stink bug emits (E)‐dec‐2‐enal as its characteristic smell, this was its first identification in the volatile constituents of liverworts.
Antimicrobial activities of the volatile oil of heteromorpha trifoliata (wendl.) eckl. & zeyh. (apiaceae)
Authors: Deans S. G. , Kennedy A. I. , Gundidza M. G. , Mavi S. , Waterman P. G. , Gray A. I. 
Published: November 2006

AbstractSteam‐distilled volatile (essential) oil from Heteromorpha trifoliata (Wendl.) Eckl. & Zeyh. (Apiaceae) was tested for antimicrobial activities. Twenty‐five bacterial and four fungal species were used in this study as test organisms. These included animal and plant pathogens, food poisoning and spoilage bacteria and mycotoxigenic fungal strains. The volatile oil exhibited considerable inhibitory activities against all the test organisms.
Chiral compounds of essential oils. Part XVII. simultaneous stereoanalysis of cymbopogon oil constituents
Authors: Kreis Peter , Mosandl Armin 
Published: November 2006

AbstractUsing enantioselective multidimensional gas chromatography (enantio‐MDGC) and the column combination polyethylene glycol/heptakis (2,3‐di‐O‐acetyl‐ 6‐O‐tert‐butyldimethylsilyl)‐β‐cyclodextrin in OV 1701‐vi, the chiral monoterpenoids cis/trans‐rose oxides, linalol, citronellal, citronellol and terpinen‐4‐ol were stereoanalysed simultaneously. The method is applied to chirality evaluation of these compounds in Cymbopogon (Citronella) oils. The enantiomeric distributions are discussed as indicators to the authenticity of these essential oils.
Essential oil of a possible new chemotype of crithmum maritimum L. growing in campania (Southern Italy)
Authors: Senatore Felice , De Feo Vincenzo 
Published: November 2006

AbstractThe essential oil of seafennel (Crithmum maritimum L.) growing in Campania (Southern Italy) was isolated by hydrodistillation in a 0.17% (v/w) yield related to the fresh weight. GC‐MS analysis showed the presence of 58 compounds, about 50 of which were identified. Monoterpenes constituted 95.0% of the total; γ‐terpinene (37%), methylthymol (29%), p‐cymene (10%) and β‐pinene (8%) were the main oil components. Some differences were found in comparison with seafennel oil analysed in earlier studies, which suggest the occurrence of different chemotypes.