摘要:

Xylopia maccreae(F.Muell.) L.S. Sm. produced an essential oil in which the major component was bicyclogermacrene (34%), with β-cubebene, β-caryophyllene and germacrene D (all <7%) being significant components. The oil yield was 0.3–0.5%.Xylopiasp. (Bertiehaugh Homestead C. Dalliston CC173) gave an oil in which spathulenol (31%) was the principal component, together with globulol, viridiflorol and caryophyllene oxide (all <10%) also present. The oil yield was 0.02%.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700950

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The stem and leaf as well as the fruit oils ofLomatium torreyishow myrcene, β-phellandrene, (Z)-β-ocimene, (E)-β-ocimene and (Z)-ligustilide to be the major components. The root oil is primarily composed of R-(-)-falcarinol (88.0%).

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700951

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The stem and leaf oilsof Eupatorium coelestinumL., Compositae, were analyzed by a combination of high resolution GC, GC/MS and13C-NMR. More than 30 components were identified, representing 75–77% of the oils. The principal oil constituents were methyl chavicol (97-45.2%), bornyl acetate (6.2–12.6%), camphene (0.3–11.9%) and cis-cadin-4-en-7-ol (5.2–10.9%) in the stem and leaf oils, respectively. The oils contained about 50% of oxygenated compounds, which contributed to the special odor of these oils.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700952

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The volatile organic compounds ofTuber uncinatumand their headspace variations during storage are determined by purge and trap methodology. The main component was 2-methyl butanol, but 2,4-dithiapentane, previously found in more appreciated species of truffles, 2-thiapentane and 2-thiα-3(Z)-pentene, which were present in lower amounts, appear to be the impact flavor compounds.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700953

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The leaf essential oils ofJuniperus centrasiaticaKom.,J. jarkendensisKom.,J. pseudosabinaFisch., Mey. & Ave-Lall.,J. sahinaL., andJ. turkestanicaKom. have been analyzed by GC/MS. The oils were very similar and were dominated by α-pinene, sabinene and cedrol with moderate amounts of limonene, terpinen-4-ol and elemol. On the basis of the oils and morphological observations, it is concluded thatJ. centrasiatica, andJ. turkestanicais conspecific withJ. pseudosabina. Comparisons were made with the leaf oil of a shrub form ofJuniperus indicaBertol from Nepal.Juniperus indica(shrub form) from Nepal was found to be very distinct fromJ. centrasiatica, J. pseudosabinaandJ. turkestanica. In addition,J. jarkendensisoil was found to be very similar toJ. sabinaoil (Tian Shan Mtns. China).

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700954

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The essential oils from the bark, leaves, buds, and flowers (full bloom)of Mesua ferreaLinn., Guttiferae, were analyzed by high resolution GC and HRGC/MS. Between 32 and 50 components were identified in the oils from the different plant parts, accounting for 82% to 97% of the total yields. Substantial variations in the relative concentrations of several constituents were noticed. The bark oil was rich in (E)-α-bisabolene (31.3%) and α-selinene (12.2%). The predominant components in the oils of tender and mature leaves were α-copaene (19.3% and 99%) and β-caryophyllene (18.8% and 26.0%). The bud and flower oils also contained α-copaene (28.7% and 20.2%), and in addition germacrene D (190% and 16.1%).

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700955

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The essential oil of six population ofMentha arvensisL. in Serbia and Montenegro were studied. Two populations of subsp.agrestis(Sole) Briq., were found to produce oil rich in pulegone (49%-28%). Three of the studied populations proposed as subsp.austriaca,were unusual in that a major compound was menthofuran (11.5%-299%) which is diagnostic ofM. aquaticaand its hybrids, whereas the third population produced oil deficient in monoterpenes. The three chemical races are distinct from those described previously for the two subspecies in F. urope, and the occurrence of a menthofuran-rich oil indicates that these population may be rather considered as natural hybrids withM. aquaticaand co-located in theM. xverticilatagroup.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700956

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The acidic volatile components in Midwest Scotch spearmint oil(Mentha gracilisSole) were investigated by means of GC, GC/MS and other analytical techniques. A total of 46 acidic components (35 carboxylic acids and 11 phenols) were identified from the oil. Among them, three carboxylic acids peculiar to spear mint oil, cis-2-pentylcyclopropane-1-carboxylic acid, 3-isopropenylpentane-1,5-dioic acid, and 3-isopropenyl-6-oxoheptanoic acid were newly assigned by spectral data and by synthesis. The absolute configuration of one of the compounds was determined to be (IS, 2R)-(+)-enantiomer by an enantioselective multidimensional GC. The quantitative comparison of the major acidic components in the other three types of spearmint oil, in two types of peppermint oil, and in cornmint oil were discussed.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700957

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Thieves, a commercial blend of five essential oils, was tested for its antibacterial activity againstMicrococcus luteus, Pseudomonas aeruginosaandStaphylococcus aureusbioaerosols. An aerosol suspension of each bacterial culture was sprayed into a 0.4 m3enclosed fume hood previously sterilized by ultraviolet light. Thieves essential oil blend was then diffused into the hood for a given time. Depositional sampling results showed a significant reduction (P<0.0001) in the aerosol-borne bacterial load after diffusion of the oil blend. Controls showed no inhibitory effect of oil that may have settled on the exposed plate surfaces during bacterial depositional sampling. Inhibition levels appear to be organism specific. There was an 82% reduction inM. luteusbioaerosol, a 96% reduction in theP. aeruginosabioaerosol, and a 44% reduction in theS. aureusbioaerosol following 10 min of exposure. Results for the time exposure threshold of diffused oil showed that after only six min a 90% reduction inM. luteusviability occurred. Diffusion of the oil blend,Thieves, can significantly reduce the number of aerosol-borne bacteria and may have application in treating air for enclosed environments and preventing transmission of aerosol-borne bacterial pathogens.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700958

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Satureja pilosaandS. icaricahave recently been proven by us to be new records for the flora of Turkey. The essential oils of these species have been analyzed by GC/MS. Carvacrol (53.5% and 52–56%, respectively) was found as the major component of these oils.

ISSN:1041-2905    

DOI:10.1080/10412905.1998.9700959

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor