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Cultures of ruminal bacteria known to metabolize unsaturated fatty acids were grown in medium containing 50 microg ml(-1) of geometric and positional isomers of conjugated linoleic acid (CLA) or 18 : 1 fatty acids and 37.4 % deuterium oxide to investigate the mechanisms responsible for fatty acid metabolism. Butyrivibrio fibrisolvens JW11 converted cis-9,trans-11-18 : 2 and trans-9,trans-11-18 ...

Abstract Tea black tussock moth, Dasychira baibarana (Matsumura) (Lepidoptera: Lymantriidae), is a devastating pest species of the tea plant in China. Here, we evaluated responses D. to volatiles using gas chromatography coupled electroantennographic detection (GC–EAD), eleclectroantennography (EAG), and Y-tube olfactometer. In total, 11 18 analyzed compounds elicited GC–EAD from test insects. ...

This study investigated the chemical composition, physical proprieties, biological activity, and enantiomeric analysis of the essential oil from the aerial parts of Niphogeton dissecta (culantrillo del cerro) from Ecuador, obtained by steam distillation. The qualitative and quantitative analysis of the essential oil was realized by gas chromatographic and spectroscopic techniques (GC-MS and GC-...

Isoprene is the most abundant biogenic volatile hydrocarbon compound naturally emitted by plants and plays a major role in atmospheric chemistry. It has been proposed that isoprene synthases (IspS) may readily evolve from other terpene synthases, but this hypothesis has not been experimentally investigated. We isolated and functionally validated in Arabidopsis the first isoprene synthase gene, ...

Bonnett, R. & Dimsdale, M. J. (1972) J. Chem. Soc. Perkin Trans. 2540-2548 Brown, S. B. & King, R. F. G. J. (1975) Biochem. J. 150, 565-567 Brown, S. B. & King, R. F. G. J. (1976) Biochem. Soc. Trans. 4, 197-201 Jackson, A. H. (1974) in Iron in Biochenlistry andMedicine (Jacobs, A. & Worwood, M., eds.), pp. 145-182, Academic Press, London and New York Schmid, R. (1977) Trans. Assoc. Am. Physici...

When B cells are activated after immunization or infection, they exchange the gene encoding the Ig H chain C region by class switch recombination (CSR). CSR generally occurs by an intrachromosomal deletional recombination within switch (S) region sequences. However, approximately 10% of CSR events occur between chromosome homologs (trans- or interallele CSR), suggesting that the homologous chro...