Materials Literature
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High-cycle fatigue tests were carried out on smooth specimens of ultrafine grained copper produced by equal channel angular pressing for 8 passes. The change in surface states during stressing was monitored, showing that shear bands (SBs) were formed at an early stage of stressing. These SBs were oriented along one se…
EUCOR is a ceramic material resistant to extreme heat and wear.A block made of EUCOR with dimensions of 350 x 200 x 400 mm was used for the numerical calculation and the experiment.The numerical model of the casting block temperature field determines the temperature gradients, the solidification rate and the local sol…
Dynamic rubber seals are major sources of friction of lubrication systems and bearings, which may take up to 70% of the total friction. The solution we present is to coat rubber with DLC thin films by which the coefficient of friction is reduced from above 1.5 to below 0.15. Coating rubber is very challenging because…
Catalysis, an old and new German classic: In March 2011, the German Catalysis Society in collaboration with the Reaction Technology Society held their annual meeting together for the first time. This meeting was held together with the intention of increasing the bond between the scientific communities of catalysis and…
En los ultimos anos se han desarrollado una amplia variedad de metodos sencillos y fiables para asignar la configuracion absoluta de compuestos monofuncionales y polifuncionales por RMN. Estos requieren de la preparacion de uno o dos derivados del sustrato cuya configuracion se quiere determinar, una reaccion que exig…
Lattice-model simulations and experiments of some small proteins suggest that folding is essentially controlled by a few conserved contacts. Residues of these conserved contacts form the minimum set of native contacts needed to ensure foldability. Keeping such conserved specific contacts in mind, we examine contacts m…
Using inhomogeneous Bogoliubov-de Gennes formalism we study superconducting properties of bundles of single wall carbon nanotubes, consisting of a mixture of metallic and semiconducting nanotubes, having different critical transition temperatures. We investigate how the averaged superconducting order parameter and the…
El objetivo del presente trabajo de tesis es la evaluacion de la utilidad de un grupo de copolimeros del acido metacrilico y diferentes esteres acrilicos o metacrilicos - disponibles comercialmente bajo la denominacion de Eudragit - para el control de liberacion de principio activo en pelets de estructura matricial el…
En el transcurso de la tesis doctoral Estructuras Supramoleculares generadas por derivados de acidos biliares y ciclodextrinas se llevaron a cabo los estudios de diversos sistemas encuadrados dentro del desarrollo de nuevas arquitecturas supramoleculares, a continuacion se muestran los resultados mas significativos. S…
Esta Tesis Doctoral estudia la obtencion de complejos metalicos con una serie de bases de Schiff compartimentales. En este trabajo se analizan dos aspectos fundamentales de estos complejos: su capacidad para absorber CO2 atmosferico y el potencial uso de complejos de baja nuclearidad en la obtencion de compuestos poli…
La metodologia dei Fattori di Correlazione (Scaling Factor) viene impiegata per determinare la radioattività dei radionuclidi HTMR (Hard To Measure Radionuclides) usando correlazioni fra loro e nuclidi chiave (KN, key nuclides) scelti fra i radionuclidi facili da misurare, ETM (Easy To Measure). Lo scopo del presente…
By law, all premises must have an approved address to allow for the delivery of goods and mail, and for use in an emergency.
The first part of the thesis discusses the impact of floating debris, accumulated at bridge crossings, on hydraulic conditions of a stream. Initially we examine the notion of woody debris, natural and anthropogenic factors contributing to its production, transport and accumulation at bridges and other obstacles in a c…
Los polimeros bloque de poli(oxido de etileno) (PEO) y poli(oxido de propileno) (PPO) despiertan un interes creciente como transportadores micelares de farmacos y componentes de sistemas de gelificacion in situ. En este trabajo se evaluan los procesos de autoagregacion en la interfase agua-aire y en medio acuoso, de l…
Se disenaron y sintetizaron en el laboratorio tres nuevo retinales N-heteroaromaticos y se evaluaron las propiedades biologicas de las bacteriorrodopsinas artificiales generadas por recombinacion con bacterioopsina. Se emplearon nuevos 1Z,3E-dienilmetales de estano y boro para la sintesis estereoselectiva de 11-cis-re…
The atomic and electronic structure of solid surfaces is reviewed. Only clean and flat surfaces are considered. The main features of the surface unit cell are highlighted. The nature and types of surface reconstructions are treated. The energy structure and energetics of surfaces are also treated. An important semicon…
The present report describes a coupling methodology adopted to link a nuclear reactor thermal-hydraulic primary system code to a containment system code, set up in the frame of task LP2- E.1 of the AdP PAR2008-09 assigned to CIRTEN. The codes to be coupled were chosen to be the RELAP5 Mod3.3 patch 3 and the Gothic ver…
El principal objetivo de este trabajo ha sido el desarrollo de nuevas nanocapsulas polimericas para vehiculizar farmacos antitumorales. Estos sistemas, constituidos por un nucleo oleoso y una cubierta polimerica cationica, fueron seleccionados por su elevada capacidad para incorporar farmacos altamente hidrofobos y qu…
El SiC es un material intensamente investigado, tanto por sus caracteristicas semiconductoras como por sus propiedades estructurales. Sin embargo, gran parte de estas investigaciones se centran en los procesos de fabricacion de piezas de SiC. Al igual que el resto de ceramicas covalentes, su sinterizacion requiere el…
Il documento riguarda uno studio di fattibilità condotto dal San Piero a Grado Nuclear Research Group dell'Università di Pisa per un programma sperimentale da svolgersi presso l'impianto SPES- 2. Data la rilevanza dell 'argomento della diluizione del boro relativamente alla sicurezza dei reattori nucleari, è stata esa…