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2017 Articolo in rivista metadata only access

Looking for central tendencies in the conformational freedom of proteins using NMR measurements

We study the conformational freedom of a protein made by two rigid domains connected by a flexible linker. The conformational freedom is represented as an unknown probability distribution on the space of allowed states. A new algorithm for the calculation of the maximum allowable probability is proposed, which can be extended to any type of measurements. In this paper we use pseudo contact shifts and residual dipolar coupling. We reconstruct a single central tendency in the distribution and discuss in depth the results.

paramagnetic NMR protein folding underdetermined problems
2014 Articolo in rivista metadata only access

Mathematical model of copper corrosion

A new partial differential model for monitoring and detecting copper corrosion products (mainly brochantite and cuprite) is proposed to provide predictive tools suitable for describing the evolution of damage induced on bronze specimens by sulfur dioxide (SO2) pollution. This model is characterized by the movement of a double free boundary. Numerical simulations show a nice agreement with experimental result. (C) 2014 Elsevier Inc. All rights reserved.

Free boundary model Parabolic problems Finite difference methods Corrosion Coppe Brochantite
2014 Articolo in rivista metadata only access

Pulsed Thermography for Depth Profiling in Marble Sulfation

Bison P ; Clarelli F ; Vannozzi A

Deterioration of stones is a complex problem and one of the main concern for people working in the field of conservation and restoration of cultural heritage. One important point in cultural heritage is to obtain information about the damage in a non-invasive way. By this paper, we propose a new non-invasive tool that permits evaluation of the thickness of (Formula presented.) (gypsum) grown (sulfation) on marble stones, using a mathematical model on data detected by pulsed infrared thermography.

Depth profiling Inverse problem Non-destructive test Pulsed thermography
2013 Articolo in rivista metadata only access

A fluid dynamics model of the growth of phototrophic biofilms

F Clarelli ; C Di Russo ; R Natalini ; M Ribot

A system of nonlinear hyperbolic partial differential equations is derived using mixture theory to model the formation of biofilms. In contrast with most of the existing models, our equations have a finite speed of propagation, without using artificial free boundary conditions. Adapted numerical scheme will be described in detail and several simulations will be presented in one and more space dimensions in the particular case of cyanobacteria biofilms. Besides, the numerical scheme we present is able to deal in a natural and effective way with regions where one of the phases is vanishing.

Fluid dynamics model Hyperbolic equations Phototrophic biofilms Front propagation
2011 Articolo in rivista metadata only access

Mathematical Models for Copper Sulfation

2010 Articolo in rivista metadata only access

A pressure model of immune response to mycobacterium tuberculosis infection in several space dimensions

2008 Articolo in rivista metadata only access

Mathematics and monuments conservation: Free boundary models of marble sulphation