Dec 5, 2014 - Activins and Nodal are members of the transforming growth factor beta (TGF-β) family of growth factors. Their Smad2/3-dependent signalling pathway is well known for its implication in the patterning of the embryo after implantation. Although this

Costis Papanayotou, Jérôme Collignon

Feb 19, 1985 - The processing of nociceptive input that occurs at the spinal level represents the first stage of effective control over its access to higher regions of the central nervous system. Recent developments in both the anatomy and physiology of

Jun 14, 1983 - A new species of hymenostome ciliate, Tetrahymena dimorpha sp.nov., is described. This ciliate occurs as a parasite in the haemocoel of larval, pupal and adult Simuliidae (Diptera). In larval hosts the total number of parasites never exceeds about

Jan 1, 1851 - The author commences by describing his mode of observation, which differs from that followed by previous observers. It consists in removing from the living tongue one of the papillæ, and immediately subjecting it to examination. He then proceeds to

Jul 8, 1907 - The physical conditions in the vessels interpose no obstacle to the exertion of a pumping action on their contents controlled by the medullary ray cells. There are many theoretical ways in which surface tension action could be brought into play in

May 5, 2006 - The geological record of protists begins well before the Ediacaran and Cambrian diversification of animals, but the antiquity of that history, its reliability as a chronicle of evolution and the causal inferences that can be drawn from it remain

A.H Knoll, E.J Javaux, D Hewitt, P Cohen

Aug 31, 1989 - New antibiotics can still be discovered by the development of novel screening procedures. Notable successes over the last few years include the monobactams, β- lactamase inhibitors (clavulanic acid) and new glycopeptides in the antibacterial held;