78 Works

Data from: Extensive seed and pollen dispersal and assortative mating in the rain forest tree Entandrophragma cylindricum (Meliaceae) inferred from indirect and direct analyses

Franck Kameni Monthe, Olivier J. Hardy, Jean-Louis Doucet, Judy Loo, Jérôme Duminil & Jean-Louis Doucet
Pollen and seed dispersal are key processes affecting the demographic and evolutionary dynamics of plant species and are also important considerations for the sustainable management of timber trees. Through direct and indirect genetic analyses, we studied the mating system and the extent of pollen and seed dispersal in an economically important timber species, Entandrophragma cylindricum (Meliaceae). We genotyped adult trees, seeds and saplings from a 400-ha study plot in a natural forest from East Cameroon...

Data from: Sex ratio variations among years and breeding systems in a facultatively parthenogenetic termite

Simon Hellemans, Denis Fournier, Robert Hanus & Yves Roisin
Some species of termites evolved an outstanding reproductive strategy called asexual queen succession (AQS), in which the primary queen is replaced by multiple parthenogenetically produced daughters (neotenics) that mate with the primary king. When the primary king is eventually replaced, this time by sexually produced neotenic king(s), sex-asymmetric inbreeding occurs and the queen’s genome is more transmitted than that of the king, thereby increasing the reproductive value of female dispersers, and female-biased population sex ratio...

NMR Study of the Reversible Trapping of SF6 by Cucurbit[6]uril in Aqueous Solution

Michel Luhmer, Luca Fusaro, Emanuela Locci & Adolfo Lai
The complexation of sulfur hexafluoride (SF6), a highly potent greenhouse gas, by cucurbit[6]uril (CB) was studied at various temperatures in Na2SO4 aqueous solutions by 19F and 1H NMR. CB shows a remarkable affinity for SF6, suggesting that it is a suitable molecular container for the design of materials tailored for SF6 trapping. At 298 K, the equilibrium constant characterizing the inclusion of SF6 by CB is 3.1 × 104 M−1 and the residence time of...

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