Your friend [EMAIL PROTECTED] has sent you the following story from Nature Science Update (http://www.nature.com/nsu/): technology: Tiny valve opens rich vein The address is: http://www.nature.com/nsu/010426/010426-10.html Their message: hydrogel valves ----------------------------------------------------------- Nature Science Update - The latest news from Nature's science writing team, now updated daily at midnight GMT http://www.nature.com/nsu/ (c) Nature News Service 2000 Registered No. 785998 England. ============================================================================= Si necesita retirarse de la lista envie un mensaje a: [EMAIL PROTECTED] con una unica linea : unsubscribe r-caldas Para inscribirse en la lista envie un mensaje a [EMAIL PROTECTED] con una unica linea : subscribe r-caldas Los mensajes que circulan en la lista los puede consultar en : http://www.mail-archive.com/r-caldas@colciencias.gov.co