Frederic Le Menn

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We have previously described the cloning, sequencing and in vitro expression of a full-length rainbow trout estrogen receptor cDNA (rtER cDNA). This full cDNA randomly labelled was used to study the estrogen induction of hepatic rtER mRNA in correlation with vitellogenin (Vg) mRNA in different physiological situations. In this paper, we show that in the(More)
Various phytoestrogens such as formononetin, daidzein, genistein and equol were synthesized. Their purity was assessed by various analytical techniques including melting point determination, thin-layer chromatography (TLC), infra-red spectra (i.r. spectra), nuclear magnetic resonance (1H- and 13C-NMR) and gas chromatography coupled with mass spectrometry(More)
Receptors that transport vitellogenin (VTG) into oocytes are of vital importance to egg-laying species because they mediate a key step in oocyte development. Here we describe the cloning of the first piscine oocyte-specific receptor cDNA, i.e., that encoding the VTG receptor from the rainbow trout (Oncorhynchus mykiss). The receptor, a 826-residue type-I(More)
— This paper presents a generic kinematic modeling approach for articulated multi-monocycle mobile robots. The formulation proposed to deduce the input/output velocity equations for such kinematic structures is an extension of the reciprocal screw based method of asymmetrical and constrained parallel mechanisms. The efficiency of this methodology for(More)
We have investigated the action of high doses of androgens in Gobius niger L., a marine teleostean fish, by characterizing specific steroid receptors in liver and by assaying the plasma vitellogenin concentration under different hormonal treatments. Estrogen and androgen receptors were characterized in the liver nuclear extracts according to their binding(More)
Robotic systems for evolution over natural and unstructured environments have to face to various types of difficulties, which are related to the ground conditions (obstacles, collapses and slopes clearance) and to the mission constraints (mechanical integrity, velocity displacement, low energy consumption, etc). The proposed paper describes an original(More)
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