Terpene composition of needle and cortical oleoresin from lateral shoots were analyzed by GC/MS for four Silver fir (Abies alba Mill.) populations scattered in natural species range in Albania. More than sixty compounds were detected in the needle oleoresin, which was characterized by a high content of alpha-pinene, camphene, beta-pinene, limonene and bornyl acetate. Three monoterpenes, alpha-p...

The antimicrobial activity of four labdane-type diterpenes isolated from the oleoresin of Copaifera langsdorffii as well as of two commercially available diterpenes (sclareol and manool) was investigated against a representative panel of microorganisms responsible for periodontitis. Among all the evaluated compounds, (-)-copalic acid (CA) was the most active, displaying a very promising MIC val...

In folk medicine pinenes are used internally for expelling kidney stones. Terebinth is prepared using the oil filtered from oleoresin (turpentine). The homeopathic remedy is primarily used to treat problems of the kidney as well as the urethra. This homeopathic remedy was proved way back in the 19th century. Pine resin mostly contains diterpene and acids of abietic and pimaric types. αand β-pin...

AKSTRACT Dcrcriloclo~~~r~s Jj-or&r/is Zim~nernr:tn is a major disturbance agent in Alnericnn pine forests, but attack prefcrcnccs for various host spt:cic:s, and their relative suitability for reproduction, are poorly knowi). We studied patterns of beetle attack and reproduction during an infestation of stands contairiing Virginia pine and lol~lolly pine. Nearly all Virginia pine were attacked ...

Maximum and minimum xylem pressure potentials of needles were measured to evaluate water status of Pinus thunbergii Parl. after inoculation with the virulent or avirulent populations of Bursaphelenchus xylophilus or B. mucronatus. In virulent B. xylophilus-inoculated pines, the water status changed abruptly and needle chlorosis occurred by day 29 after inoculation. Similar changes were not seen...

Phytochemical analysis of A. balsamea oleoresin led to the isolation of three new 3,4-seco-lanostane triterpenoids 1-3, one new cycloartane triterpenoid 4 along with fourteen known terpenoids. Structure determinations were based on extensive 1D/2D NMR, IR and MS spectroscopic analyses, and comparison with literature data. The isolated compounds were evaluated in vitro for their cytotoxicity aga...

MAGEE. T. V., and D. F. ZINKEL. 1986. A rapid method for diterpene resin acid analysis of pine needle oleoresin. Can. J. For. Res. 16: 1107-1109. A method for diterpene resin acid analysis has been developed for pine oleoresin samples at the submilligram level. The method utilizes the removal of acidic components by a micro-DEAE-Sephadex ion-exchange column and analysis of the recovered resin a...

The effect of proportion of maltodextrin and gum arabic as carrier material and the percentage of nutmeg oleoresin as flavor load on microencapsulation by spray drying was studied. The proportions of 0, 20, 40 and 60 percent gum arabic (w/w) in the carrier blend and 10, 20 and 30 percent nutmeg oleoresin (w/w) as flavor load were studied. Emulsions were microencapsulated in a vertical co-curren...

Fractionation with n-hexane/ethyl acetate (1:1 v/v) by open column chromatography of the oleoresin from Pinus oocarpa Schiede yielded two diterpenes, pimaric acid (1) and dehydroabietic acid (5), the sesquiterpene longifolene (3) and a diterpenic mixture containing pimaric acid (1), isopimaric acid (4) and dehydroabietic acid (5). Subsequently, the isolated compounds, the mixture of 1, 4 and 5,...

Elicitors are compounds, which activate chemical defences in plants. Various biosynthetic pathways are activated in treated plants depending on the compound used. The most intensively studied elicitor for manipulating defence pathways in plants is methyl jasmonate, which modifies e.g. the production of terpenoids, the main constituents of conifer oleoresin. Other commonly tested chemical elicit...