Éditeur(s) : Musée des Cultures Guyanaises (Cayenne)
Extrait de : Rencontres transfrontalières Oyapock, les 1er et 2 décembre 2012. Université des Antilles et de la Guyane
Description : La production d'objets et de produits usuels ou décoratifs, particulièrement importante chez les populations amazoniennes, trouve un nouveau souffle avec le développement de l'artisanat. En effet, au delà de la dimension économique, le maintien d'une production artisanale contribue à la valorisation et à la transmission de nombreux savoirs, techniques et matériaux traditionnels. A travers les témoignages proposés dans cet atelier et les débats qui s'ensuivront, nous tenterons d'identifier les moyens mis à disposition des artisans en Guyane et au Brésil ainsi que la manière dont est structurée l'offre de produits artisanaux : les réseaux, les circuits commerciaux et les filières de distribution favorisés.
Siècle(s) traité(s) : 21
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V13112
V13112

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Archives of Cardiovascular Diseases Supplements
Strasbourg, France

hal-01118035
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01118035
DOI : 10.1016/S1878-6480(14)71283-2

Éditeur(s) : Gauthier-Villars
Résumé : In order to estimate the losses of CaCO3 from bioerosion (grazing and boring), experimental coral substrates were laid in the lagoons of high islands and atolls in French Polynesia. After six months of exposure, the sites could be divided into those exhibiting net bioerosion and those exhibiting net accretion. Of the five sites exhibiting net bioerosion (grazing and macroboring greater than accretion), three were located off high islands and two in atoll lagoons. The average net rate of bioerosion was greatest at Faaa in Papeete Bay, Tahiti (10.45 kg.m(-2).yr(-1)). Of, the two sites exhibiting net accretion, the greatest rate of gain (0.81 kg.m(-2).yr(-1)) was recorded at the eastern site in Takapoto lagoon. Recorded differences in the composition and distribution of macroborers, microborers and the algal turf appeared to be related to the presence or absence of grazing sea urchins (Echino-metra mathaei). It is suggested that the high densities of algal turf recorded at Faaa are a result of elevated nutrients at this site, originating in the sewage discharge from nearby residential and industrial sites.
Oceanologica Acta (0399-1784) (Gauthier-Villars), 1995 , Vol. 18 , N. 5 , P. 531-541

Droits : info:eu-repo/semantics/openAccess
http://archimer.ifremer.fr/doc/00097/20795/18419.pdf
http://archimer.ifremer.fr/doc/00097/20795/

Éditeur(s) : HAL CCSD Wiley Open Access
Résumé : International audience
Estetrol (E4) is a natural estrogen with a long half-life produced only by the human fetal liver during pregnancy. The crystal structures of the estrogen receptor α (ERα) ligand-binding domain bound to 17β-estradiol (E2) and E4 are very similar, as well as their capacity to activate the two activation functions AF-1 and AF-2 and to recruit the coactivator SRC3. In vivo administration of high doses of E4 stimulated uterine gene expression, epithelial proliferation, and prevented atheroma, three recognized nuclear ERα actions. However, E4 failed to promote endothelial NO synthase activation and acceleration of endothelial healing, two processes clearly dependent on membrane-initiated steroid signaling (MISS). Furthermore, E4 antagonized E2 MISS-dependent effects in endothelium but also in MCF-7 breast cancer cell line. This profile of ERα activation by E4, uncoupling nuclear and membrane activation, characterizes E4 as a selective ER modulator which could have medical applications that should now be considered further.
ISSN: 1757-4676

hal-01118028
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01118028
PUBMED : 25214462
PUBMEDCENTRAL : PMC4287935
DOI : 10.15252/emmm.201404112