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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Caffeine and theobromine in epicuticular wax of Ilex paraguariensis A. St.-Hil.

Caffeine and theobromine were identified and quantified in leaf epicuticular waxes of Ilex paraguariensis A. St.-Hil. (Aquifoliaceae). The total epicuticular leaf wax content was ca. 0.5% on average of dry leaf weight. Epicuticular caffeine and theobromine contents varied from 0.16 to 127.6 microg/mg and from 0 to 9.5 microg/mg of wax, respectively. For some selected samples, the intracellular methylxanthine concentration was also determined. A positive correlation was found between inner and epicuticular caffeine contents.[1]

References

  1. Caffeine and theobromine in epicuticular wax of Ilex paraguariensis A. St.-Hil. Athayde, M.L., Coelho, G.C., Schenkel, E.P. Phytochemistry (2000) [Pubmed]
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