1,031 research outputs found
Un liberto dell’imperatore: autopsia di CIL, V, 3510
No full textViene studiata l'iscrizione romana CIL V, 3510, tramandata solo da fonti manoscritte, menzionante un liberto di un imperatore, forse Marco Aurelio o Commodo
SIMULAZIONE DI SPERIMENTAZIONI: EVOLUZIONE DI UN GETTO INCOMPRESSIBILE TURBOLENTO A SIMMETRIA ASSIALE. DIMA. Fluidodinamica: nota didattica n. 9. Maggio 2005. La pubblicazione, in regola con la Legge sulla stampa, da luogo ad un programma applicativo, estraibile dal sito: www.dima.unipa.it - percorso: personale/docenti/ditommaso/supporti didattici
No full textEntropy production and lost work for irreversible processes
No full textIn this paper we analyse in depth the Lost Work in an irreversible process (i.e. IRREV REV Lost ) W =W -W . This quantity is also called ‘degraded energy’ or ‘Energy unavailable to do work’. Usually in textbooks one can find the relation Lost U W o TDS .
Here we show that Lost W can be expressed in terms of internal and external Entropy production, int p and ext p , quantities which enable to write down in a simple way the
Clausius inequality. We will show that o + B A
Endo ext ext B A Lost sys T T W dp d p int , where sys T is the
temperature of the system during the corresponding quasi-static process and ext T is the temperature of the external heat source during the related Endo-reversible process.
Endo ext dp is the infinitesimal entropy production in each infinitesimal step of such Endoreversible
process. Examples are given for elementary processes
Ready, STAT, go: transcription factors on the move.
No full textIn this issue of The EMBO Journal, Ben-Yaakov et al (2012) explore the contribution of transcription factors (TFs) in directly communicating information about injury between the axon and the nucleus. They show that multiple TFs bind the retrograde molecular motor dynein in injured axons. Focusing on one TF family, the authors reveal that STAT3 is locally translated and activated in injured axons, and then transported retrogradely to the nucleus to promote survival of peripheral sensory neurons
Palermo tra dialogo e negoziazione
No full textLa globalizzazione economica ha tra i suoi effetti quello di porre in competi-zione i territori e le città, che sono così lo specchio dei forti cambiamenti che coin-volgono la società del XXI secolo. Ciò avviene a più livelli e in più settori, dato che i territori stessi sono sede di risorse potenziali che necessitano di idee, organizzazione e investimenti per poter essere valorizzate. Nel nuovo millennio le nuove direzioni intraprese da chi ha il compito di valorizzare un territorio in chiave turistica sono orientate sempre più all’utilizzo di un approccio di tipo sistemico
A Concerted Electrochemical and Theoretical Investigation of the Ag/TiO2 nano-heterojunction
No full textSuitably designed nano-heterojunctions are able to enhance synergistic functionalities of different materials yielding to “brave new systems” with innovative and sometimes unexpected physicochemical properties [1]. However, the complete understanding of these devices has to be deeply studied. In this work, a concerted theoretical and electrochemical investigation is proposed to gain insights into a metal-semiconductor interface, namely that created by the silver/anatase hybrid nanocomposite, a promising material for advanced sensing applications [2]. In particular, it provided the first photorenewable and anti-fouling sensor device, enhancing the analytical limits in terms of accuracy, sensitivity, detection limits, and photoactivity [3]. Furthermore, the hybrid material is proven to be extremely robust against aging, showing complete regeneration, also after one-year storage.
The electrochemical/electroanalytical virtues of the Ag/TiO2 junction were evaluated in terms of current densities and reproducibility, providing their explanation at the atomic-scale level and demonstrating how and why the final device can act as silver-cation positive electrode [4]. Moreover, Cyclic Voltammetry and Electrochemical Impedance Spectroscopy were used in combination with periodic plane-wave DFT calculations, giving comparable qualitative but also quantitative results. In particular, we theoretically estimated the overall amount of electron transfer toward the semiconductor side of the interface at equilibrium and suitably designed electrochemical experiments, which strictly agree with the theoretical charge transfer estimates. Moreover, photoelectrochemical measurements and theoretical predictions show the unique permanent charge separation occurring in the device [4].
[1] A.V. Emeline, V.N. Kuznetsov, V.K. Ryabchuk, N. Serpone, Environ. Sci. Pollut. Res., 2012, 19, 3666–3675.
[2] G. Soliveri, V. Pifferi, G. Panzarasa, S. Ardizzone, G. Cappelletti, D. Meroni, K. Sparnacci, L. Falciola, Analyst, 2015, 140, 1486–1494.
[3] V. Pifferi, G. Soliveri, G. Panzarasa, G. Cappelletti, D. Meroni, L. Falciola, Anal. Bioanal. Chem., 2016, 408, 7339–7349.
[4] G. Di Liberto, V. Pifferi, L. Lo Presti, M. Ceotto, L. Falciola, J. Phys. Chem. Lett., 2017, 8, 5372–5377
ATTIVAZIONE DEL RECETTORE METABOTROPICO PER IL GLUTAMATO mGLUR2/3 E REGOLAZIONE DELL’ESPRESSIONE DEL BDNF NEL CERVELLO DI TOPO
No full text
Attivazione dei recettori metabotropici per il Glutamato mGluR2/3 e regolazione dell'espressione del BDNF e NGF nel cervello di topo
No full text- …
