Showing papers on "Terpene published in 1986"
Journal Article•
TL;DR: The amount of free and glycosidically-bound forms of linalool, geraniol, nerol, α-terpineol, cis-and trans-furan linedool oxides, oxides and diendiol I (3,7-dimethyl octa-l,5-diene-3, 7-diol) were determined in the skin, juice (serum), and pulp (pellet) fractions of mature Muscat of Alexandria, White Frontignac, and Traminer grapes as discussed by the authors.
Abstract: The amount of free and glycosidically-bound forms of linalool, geraniol, nerol, α-terpineol, cis - and trans -furan linalool oxides, cis - and trans -pyran linalool, oxides, and diendiol I (3,7-dimethylocta-l,5-diene-3,7-diol) were determined in the skin, juice (serum), and pulp (pellet) fractions of mature Muscat of Alexandria, White Frontignac, and Traminer grapes. The pulp fractions of the grapes were found to have terpene compositions reflecting those of the juices. In all the varieties, free geraniol and nerol were associated mostly with the skins of the berries. Free linalool and diendiol I were uniformly distributed between skin and juice of the two muscats, and Traminer contained very little of either of these monoterpenes. Glycosylation effectively redistributes the monoterpenes throughout the berry fractions. The linalool oxides were lesser terpenes of the three varieties, with cis - and trans -furan linalool oxides present principally as glycosides in both skin and juice. The pyran linalool oxides were found mainly free in the juices. α-Terpineol and its glycosides were minor components of all the varieties. From the distribution patterns, it is clear that free aroma substances as well as potential flavorants of the grape are not concentrated solely in the skins of the berries but are present in the juice as well.
151 citations
TL;DR: A partially purified and lyophilized preparation of (+)-alpha-pinene cyclase from sage was shown to convert geranyl pyrophosphate to the monoterpene olefins alpha- pinene, camphene, limonene, and myrcene, in hexane with the addition of 0.1 to 10% water.
43 citations
Patent•
18 Jul 1986
TL;DR: Novel terpene amino alcohols having an antiallergic activity or an activity of improving cerebral function are provided in this article, where medicinal uses of the alcohols are also discussed.
Abstract: Novel terpene amino alcohols having an antiallergic activity or an activity of improving cerebral function are provided Also provided are medicinal uses of the alcohols
28 citations
TL;DR: In this article, the authors have reported several bitter terpenoids and related compounds from the fungus Ganoderma lucidum (Reishi) and named them as D2 and E2, respectively.
Abstract: The fruiting body of the fungus Ganoderma lucidum (Reishi) has attracted much attention as a folk medicine, and some of its components have been elucidated. We have also reported several bitter terpenoids and related compounds from the fungus.1~9) The naming of lucidenic acids is a little confused, so we now designate our lucidenic acids D and E2) as Dx and El5 and Kikuchi's7) as D2 and E2, respectively. Recently, we have isolated four new terpenoids, ganolucidic acid D (1), methyl
23 citations
TL;DR: The reaction of diterpenes 1, 3 and monoterpenes 9, 10 with thallium triacetate leads stereoselectively to the tetrahydrofuran products 5, 7 and 11, 12 respectively, by 5-Endo-Trig cyclisation of the 3-alkenol system.
20 citations
TL;DR: The terpenoid composition of the leaf resin of three Baccharis species has been studied in this article, and the structures of these terpenoids have been established by spectroscopic methods and by comparison with the data reported for related compounds.
16 citations
Journal Article•
TL;DR: The volatile compounds of European oak (Quercus robur L.) heartwood, which have been used for aging cognac brandy, were enriched by a simultaneous distillation-extraction apparatus with ether and compared with the volatile substances from the heartwood of three species of Japanese oaks as discussed by the authors.
Abstract: The volatile compounds of European oak ( Quercus robur L.) heartwood, which have been used for aging cognac brandy, were enriched by a simultaneous-distillation-extraction apparatus with ether and compared with the volatile substances from the heartwood of three species of Japanese oaks: mizunara ( Q. mongolica Turcz. var. grosseserrata Rehd. et Wils.), konara ( Q. serrata Thunb.) and kashiwa ( Q. dentata Thunb.). In the volatiles from the four species, 46 compounds including furfurals, 3-methyl-4-hydroxy octanoic acid gamma-lactones (MO-lactones), and terpenes were identified by means of gas chromatography (GC) and gas chromatography-mass spectrscopy (GC/MS). Quantitative and qualitative differences of the volatiles were determined. Relatively low concentrations of furfural and * 2trans -MO-lactone, which are decisive compounds in flavor improvement during aging, the absence of cis -MO-lactone, the presence of linalool oxide, and the higher concentrations of sesquiterpens are characteristic of European oak.
13 citations
TL;DR: In this article, the separation of β-pinene and menthone by HPLC on a silica gel column can be significantly improved with decreasing the column temperature, and complete separation of oxygenated terpenes from terpene hydrocarbons could be carried out under such conditions.
Abstract: The separation of β-pinene and menthone by HPLC on a silica gel column can be significantly improved with decreasing the column temperature. On a perparative scale complete separation of oxygenated terpenes from terpene hydrocarbons could be carried out under such conditions.
6 citations
TL;DR: The essential oil of Thymus tosevii Velen (Lamiaceae) growing wild in Greece was investigated by means of GLC, GC-MS, and the physico-chemical constants were determined.
Abstract: The essential oil of Thymus tosevii Velen. (Lamiaceae) growing wild in Greece was investigated by means of GLC, GC-MS, and the physico-chemical constants were determined. The essential oil content was 0.9%. As main constituents resulted linalool 35.5% and geraniol 27.5%. In addition twelve monoterpene hydrocarbons, nine oxygen containing compounds, one sesquiterpene, and two terpene esters were identified, making up about 98% of the oil.
5 citations
01 Jan 1986
TL;DR: In this article, Cevatiola eviooides (Empetraceae) and Calamintha aehei (Lamiaceae) were chemically investigated for natural products with possible allelochemical activities.
Abstract: As part of a chemical-ecological study of the Florida scrub community, Cevatiola eviooides (Empetraceae) and Calamintha aehei (Lamiaceae) were chemically investigated for natural products with possible allelochemical activities. The chromatographic separations and chemical investigations were guided by germination and radicle growth bioassays performed on seeds of commercial lettuce (Laotuoa eativa) and Sohizaohyvium soopavium, a native grass of the Florida sandhill community. From the dichloromethane extract of aerial parts of C. eviooides, 2',4'-dihydroxychalcone, the dihydrochalcones angoletin and 2',6'-dihydroxy-4-methoxy-3',5'dimethyldihydrochalcone, the flavanones 8methylpinocembrin, 6,8-dimethylpinocembrin and 7hydroxyflavanone were isolated along with the triterpenes erytrodiol and ursolic acid. Significant inhibition on S. soopavium radicle growth was observed with 6,8-dimethylpinocembrin when applied in a saturated aqueous solution of ursolic acid. From the active region of the ethyl acetate extract of C. eviooides, catechin, epicatechin, (A-2) dimer and