Presence Of Linalool Research Articles

Chemical Segregation of Progeny of Camphor Trees with High Camphor c.q. Linalool Content

The propagation of open pollinated seed from two camphor trees with a high camphor and linalool content, respectively, yielded 115 progeny. The chemical composition of the leaf oils of these trees was analyzed by a combination of capillary GC and GC/MS. Four chemotypes could be distinguished among the 57 trees cultivated from a single mother tree rich in camphor [Cinnamomum camphora (L.) Sieb.]. The first group (23 trees) was rich in camphor (62–93%), and the second group (13 progeny) contained 1,8-cineole and a-terpineol as major compounds (30–57% and 14–25%, respectively). Thirteen trees yielded oils rich in (E)-nerolidol and 9-oxonerolidol (47–84%). The oils of eight other trees also contained (E)-nerolidol and 9-oxonerolidol (22–36%) but contained higher proportions of safrole (30–70%). The leaf oils of 58 individual trees propagated from another mother tree which was rich in linalool [C. camphora (L.) Sieb. var. linaloolifera], indicated the presence of six chemotypes. Most of the progeny, 33 trees, contained oils rich in linalool (72–96%), and seven trees yielded oils containing camphor as major constituent (70–86%). The oils from eight trees contained mainly (E)-nerolidol and 9-oxonerolidol (61–91%), while those from six progeny contained a mixture of camphor (19–71%) and linalool (14–72%). Three trees yielded oils rich in 1,8-cineole (54–56%), β-pinene (16–24%) and α-terpineol (9–11%). The oil of one tree was characterized by the significant presence of linalool (38%), 1,8-cineole (36%) and β-pinene (11%).

Chemical contents of male mandibular glands of three Centris species (Hymenoptera:Anthophoridae) from Costa Rica

1. 1. The chemical content of male mandibular glands of three sympatric Costa Rican Centris bees was determined by GC-MS. 2. 2. Centris aethiocesta and C. flavofasciata, both of which occur in beach habitat and differ morphologically only in leg colour, could be differentiated by the presence of linalool ( x = 9.8% of total) and nerol ( x = 13.4% ) in C. aethiocesta glands and their absence in C. flavofasciata, and the presence of geranial in glands of male C. flavofasciata ( x = 9.7% ) but its absence from C. aethiocesta gland extracts. 3. 3. Centris flavifrons and C. flavofasciata glands both contained neral, geranial, geranyl acetate and geraniol; however, they could be distinguished as geraniol was the most abundant volatile chemical in glands of C. flavifrons ( x = 77.0% ), whereas neral was most abundant in C. flavofasciata ( x = 56.7% ).

Postacidotic Complications of Diarrhea

The aim of this work was to evaluate the chemical diversity of the essential oil from leaves of a native population of Myrcia ovata Cambessedes collected in northeast Brazil, and to evaluate the antifungal potential of sampled plants against Fusarium solani. Essential oils of 37 plants were obtained by hydrodistillation and analyzed by GC/MS-FID. Twenty-nine compounds were detected and identified in the essential oil of M. ovata plants. High chemical diversity was observed among the sampled plants, which were distributed within 6 clusters through cluster analysis. Cluster I, consisting of 11 plants, was characterized by the presence of nerolic acid as the major compound (44.30–73.97%). Cluster II, consisting of 7 plants, was characterized mainly by the presence of the compounds linalool (14.97–30.97%) and nerolic acid (50.56–60.63%) as the major compounds. Cluster III, consisting of 3 plants, was characterized by the presence of geraniol (73.64–77.07%) as the major compound. Cluster IV, consisting of 3 plants, was characterized by the presence of compounds neral (18.21–28.39%) and geranial (36.96–48.48%) as the major compounds, and thus formed the citral group. Cluster V, consisting of 4 plants, was characterized by the presence of (E)-nerolidol (26.97–58.27%) as the major compound. Cluster VI, consisting of 9 plants, was characterized by the presence of linalool (0.44–25.35%), and/or isopulegol (0–27.50%), and/or nerolic acid (0–31.65%) as the major compounds. Essential oils from Clusters I, II, III, IV and VI provided the maximum mycelial growth inhibition (100%) of F. solani at all tested concentrations, after 96 h of incubation.