Delphine Collin

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Atomic force microscopes and optical tweezers are widely used to probe the mechanical properties of individual molecules and molecular interactions, by exerting mechanical forces that induce transitions such as unfolding or dissociation. These transitions often occur under nonequilibrium conditions and are associated with hysteresis effects-features usually(More)
Mechanical unfolding and refolding of single RNA molecules have previously been observed in optical traps as sudden changes in molecular extension. Two methods have been traditionally used: "force-ramp", with the applied force continuously changing, and "hopping". In hopping experiments the force is held constant and the molecule jumps spontaneously between(More)
Functional hypothalamic amenorrhea are very probably due to a decrease of the frequency of the secretory pulses of LH, ie of GnRH. This decrease could be the consequence of a chronic hypersecretion of the corticotropin releasing hormone (CRH). CRH seems to act on the hypotalamic pulse generator of GnRH through the effect of the endogenous opioid peptides of(More)
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