In the field of engineering materials, strength and toughness are typically two mutually exclusive properties.Structural biological materials such as bone, tendon or dentin have resolved this conflict and show unprecedented damage tolerance, toughness and strength levels.The common feature of these materials is their hierarchical heterogeneous stru
El análisis de las diecisiete páginas web de Andalucía nos proporcionará las claves, no sólo sobre el tipo de turismo que desde los organismos oficiales se pretende vender, sino también los aspectos técnicos-formales que aparecen en dichas páginas.Los apartados que vamos a analizar en las diecisiete páginas Web están entre los primeros
Both Trapa L.and the extinct Hemitrapa Miki are aquatic plants in the family Lythraceae, with abundant fossil records in Eurasia and North America in the Cenozoic.However, documented materials are mainly based on fruit and pollen grains without reliable leaf fossils.Here, we report fossil leaves, fruit, and roots of Trapa and fruit of Hemitrapa fro