The copolymerization of bio-renewable β-myrcene or β-farnesene with styrene was examined using an ansa-neodymocene catalyst, affording two series of copolymers with high styrene content and unprecedented syndioregularity of the polystyrene sequences. The incorporation of terpene in the copolymers ranged from 5.6 to 30.8 mol % (β-myrcene) and from 2.5 to 9.8 mol % (β-farnesene), respectively. NM...

The chemical composition of the essential oils of flower at the pre-flowering, full-flowering and post-flowering stage of A. annua was analyzed by GC and GC/MS and sixty-two components were identified. The main compounds in the pre-flowering oil were β-myrcene (37.71%), 1, 8-cineole (16.11%) and camphor (14.97%). The full-flowering oil contained predominantly caryophyllene (19.4%), germacrene D...

Producers in the Western Cape province of South Africa are looking towards a push-pull strategy to reduce oviposition damage plums by western flower thrips (WFT). White clover, Trifolium repens L., favoured host plant WFT, was investigated as possible trap crop provide “pull” element. The attractiveness collected volatiles white clover flowers and unopened (balloon stage) open plum (Prunus sali...

To better understand the cold-induced regulation of scald-like disorders in pears and specific roles played by ethylene ?-farnesene, three pear cultivars with different patterns production chilling requirement were used this study. Fruit treated 1-MCP (ethylene inhibitor) Lovastatin (?-farnesene stored at -0.5 °C 90 % RH during 6 months. Changes targeted metabolites, enzymes genes monitored per...

the roots and rhizomes of tanacetum parthenium (l.) schulz. bip. (asteraceae), have been used in iranian traditional medicine under the name of aqhovan, as digestive and stomachic tonic. composition of the essential oil, which was obtained from the root of t. parthenium collected from karaj, was determined by gas chromatography, combined gc/ms and gc/ir. in total, 20 components (92% of essentia...

BACKGROUND Aphids are agricultural pests of great economical interest. Alternatives to insecticides, using semiochemicals, are of difficult applications. In fact, sex pheromones are of little use as aphids reproduce partenogenetically most of the time. Besides, the alarm pheromone, (E)-ß-farnesene for a great number of species, is difficult to synthesize and unstable in the environment. The sea...

The development of sustainable replacements for fossil fuels has been spurred by concerns over global warming effects. Biofuels are typically produced through fermentation of edible crops, or forest or agricultural residues requiring cost-intensive pretreatment. An alternative is to use photosynthetic cyanobacteria to directly convert CO2 and sunlight into fuel. In this thesis, the cyanobacteri...