Search results for "Principi"
showing 10 items of 580 documents
Polyactide Biodegradable Scaffolds for Tissue Engineering Applications: Phase Separation-Based Techniques
2011
One of the most reliable techniques for the preparation of biodegradable scaffolds suitable for tissue engineering applications (e.g. regeneration of wounded/damaged tissues) is based on liquid/liquid phase separation of ternary solvent/antisolvent/polymer solutions. In particular, two phase separation protocols are examined here: Thermally Induced Phase Separation (TIPS) and Diffusion Induces Phase Separation (DIPS). According to the former protocol, a thermodynamically stable polymeric ternary solution is brought below its metastability/instability point (spinodal/binodal curve) by quench in a cooling medium: under opportune conditions, a foam-like structure is formed by nucleation and 3-…
Particle distribution in unbaffled stirred vessels
2017
The present work is devoted to providing an insight into the solid-particle distribution within top-covered unbaffled stirred tanks via purposely collected local experimental data. Experiments were carried out on a lab- scale unbaffled stirred tank by making use of a recently introduced technique named Laser Sheet Image Analysis (LSIA). In its original formulation, the technique includes an image post-processing procedure to delete reflection effects on results. In the framework of the present work, a method combining the use of purposely produced fluorescent particles and a suitable camera high pass filter was devised and presented. Results collected with (new method) and without (old fash…
On the simulation of stirred tank reactors via computational fluid dynamics
2000
Abstract Predictions of flow fields in a stirred tank reactor, obtained by computational fluid dynamics, were used for the simulation of a mixing sensitive process consisting of two parallel reactions competing for a common reagent: A + B → Prod .1 A + C → Prod .2. Experimental data were obtained for A = OH − , B = 1 2 Cu ++ and C=ethyl-chloroacetate. For this reaction scheme the final selectivity of the process, easily measured by a simple colorimetric analysis of the residual Cu++, was found to depend on agitation speed and therefore on the mixing history during the batch process. The flow field-based three-dimensional simulations performed here led to predictions that compared very well …
Performance of a RED system with ammonium hydrogen carbonate solutions
2016
The use of closed-loop salinity gradient power (SGP) technologies has been recently presented as a viable option to generate power using low-grade heat, by coupling a SGP unit with a thermally-driven regeneration process in a closed loop where artificial solutions can be adopted for the conversion of heat into power. Among these, the closed-loop reverse electrodialysis (RED) process presents a number of advantages such as the direct production of electricity, the extreme flexibility in operating conditions and the recently demonstrated large potentials for industrial scale-up. Ammonium hydrogen carbonate (NH4HCO3) is a salt suitable for such closed-loop RED process thanks to its particular …
Flow and mass transfer in spacer-filled channels for reverse electrodialysis: a CFD parametrical study
2016
Abstract In reverse electrodialysis (RED) concentration polarization phenomena and pressure drop affect strongly the power output obtainable; therefore the channel geometry has a crucial impact on the system optimization. Both overlapped and woven spacers are commonly commercialised and adopted for RED experiments; the latter exhibit some potential advantages, such as better mixing and lower shadow effect, but they have been poorly investigated in the literature so far. In this work, computational fluid dynamics was used to predict fluid flow and mass transfer in spacer-filled channels for RED applications. A parametric analysis for different spacer geometries was carried out: woven (w) and…
IL PRINCIPIO DI PRECAUZIONE FRA GESTIONE DEL RISCHIO E TUTELA DEGLI INTERESSI PRIVATI
2012
La rappresentanza apparente: verso un nuovo modello di rappresentanza
2022
ABSTRACT RAPPRESENTATNZA APPARENTE L’autore propone una ricostruzione della rappresentanza apparente, in grado di avallare il consolidamento di un modello uniforme di rappresentanza e di imputazione dei rapporti giuridici, fondato sull’agire per conto altrui e sul principio di affidamento. Seguendo autorevoli insegnamenti, che attribuivano all’agire nell’interesse altrui la base sostanziale dell’istituto rappresentativo, l’autore individua diverse forme di agire rappresentativo, il cui dato comune sarebbe dato dall’agire per conto altrui e dal principio di affidamento. Nonostante lo schema disegnato dall’art. 1388 c.c. descriva una fattispecie caratterizzata dalla presenza dei requisiti del…
Letture di giurisprudenza. Aggiornamento 2011
2011
il volume si propone di accompagnare il lettore nella disamina di alcune questioni maggiormente dibattute in sede interpretativa nel campo del diritto privato, prestando attenzione sia al dato normativo nazionale e sovranazionale che ai percorsi seguiti dalla giurisprudenza interna ed europea. I temi trattati mostrano un ordinamento in continua evoluzione, cui si richiede flessibilità, specie con riferimento ad ambiti ed esperienze che presentano ricadute immediate su diritti e libertà fondamentali.
L'autonomia scolastica nel quadro delle riforme amministrative dello Stato
2000
Il contributo esamina la questione dell'autonomia scolastica alla luce dei principi costituzionali in materia di isttruzione e nell'ambito delle riforme amministrative dello Stato
L’ORDINAMENTO ITALIANO E IL FINE VITA TRA BIOETICA E PRINCIPI COSTITUZIONALI, A PARTIRE DAL CASO ENGLARO E ATTRAVERSO L’ESPERIENZA DI ALCUNI ORDINAME…
2011
Il lavoro parte dall'esperienza italiana del caso Englaro, prosegue con l'analisi della giurisprudenza e della legislazione di alcuni paesi stranieri per poi concludersi con l'esami del disegno di legge sul tema attualmente in discussione in Parlamento per svolgerne alcune considerazioni critiche.