Titre : SML Nancy 2011 - Vitamine D : biochimie, métabolisme et effets osseuxIntervenant(s) : Jean-Louis GUEANT (Professeur – Service de biochimie, Hôpital de Brabois - CHU de Nancy)Résumé : Objectifs

Le transport nucléocytoplasmique. Les échanges de macromolécules entre les noyau et le reste de la cellule sont trés importants. Il s'agit principalement de protéines et d'ARN. On parle d'import pour

Longtemps savants et philosophes ont cherché à élucider la nature de la vie. L'idée de vie suggérait l'existence de quelque substance ou de quelque force spéciale. On pensait que la "matière vivante",

Development of hematopoietic cells has been investigated intensively in the chicken embryo. Early hematopoietic stem cells develop in the aortic region and seed to primary lymphoid organs where

The functional properties of biomineralized structures found in Nature result from interactions between their hybrid components – both organic (mostly proteins) and inorganic (mineral) phases – to

The avian eggshell is a thin mineral layer (350 µm thick in chicken) that protects the egg content against mechanical impacts, dehydration and microorganism contamination. Eggshell formation is a

Egg morphology is essential for animal survival, mediating the interactions between embryos and their environment, and a result have evolved into an enormous diversity of forms and functions in

Avian eggs possess very efficient and orchestrated systems to protect the embryo during incubation, until hatch. Although the internal components of the egg are assumed to be sterile, the surface

Avian eggs have a proteinaceous cuticle covering the outside of the eggshell forming a barrier to the transmission of microorganisms. Although the cuticle is similar to the organic matrix, its

In oviparous animals such as birds, embryonic development occurs in the egg; after oviposition, there is no further possibility of material exchange from the hen to fulfill the physiological needs

The avian egg is designed to support the autonomous development of the chick embryo in the outside environment. It initially contains all the nutrients required for embryonic growth and provides