DE WITT L. SUMNERS, Florida State University
DNA TOPOLOGY
Martedì 14 Giugno 2011, ore 14:30
Dipartimento di Matematica, Università di Milano Bicocca, aula seminari 3014 |
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Abstract
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This lecture will give an introduction to the topology and geometry of DNA. Cellular DNA is a long, thread-like molecule with remarkably complex topology. Enzymes that manipulate and carefully control the geometry and topology of cellular DNA perform many important cellular
processes (including segregation of daughter chromosomes, gene regulation, DNA repair, and generation of antibody diversity). Some enzymes pass DNA through itself via enzyme-bridged transient breaks in the DNA; other enzymes break the DNA apart and reconnect it to different ends. In the topological approach to enzymology, circular DNA is incubated with an enzyme, producing an enzyme signature in the form of DNA knots and links. By observing the changes in DNA geometry (supercoiling) and topology (knotting and linking) due to enzyme action, the enzyme binding and mechanism can often be characterized. This talk is intended for a general scientific audience, and will discuss topological models for DNA strand passage and exchange, including the analysis of topoisomerase experiments on circular DNA using knot theory.
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JUAN LUIS VAZQUEZ, Universidad Autonoma de Madrid
NONLINEAR DIFFUSION, FROM POROUS MEDIA TO FRACTIONAL DIFFUSION. EVOLUTIONS, FREE BOUNDARIES AND ASYMPTOTICS
Martedì 07 Giugno 2011, ore 16:30
Dipartimento di Matematica, V. Saldini, 50, Aula Chisini | |
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ROBERTO MAURI, Dip.to di Ing. Chimica, Chimica Ind. e Scienze dei Materiali, Università di Pisa
MEAN FIELD MODELING OF MULTIPHASE SYSTEMS
Lunedì 23 Maggio 2011, ore 17:00
Dipartimento di Matematica, Politecnico di Milano, Aula Seminari VI piano | |
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THOMAS BARTSCH, University of Giessen
SOLITARY WAVES FOR COUPLED NONLINEAR SCHROEDINGER EQUATIONS
Mercoledì 30 Marzo 2011, ore 17:00
Università di Milano, Dipartimento di Matematica, Via Saldini | |
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FULVIO RICCI, Scuola Normale Superiore di Pisa
RECENTI SVILUPPI NELLA TEORIA DEGLI INTEGRALEI SINGOLARI
Venerdì 25 Febbraio 2011, ore 11:00
Politecnico di Milano, Dipartimento di Matematica, Sala Consiglio VII piano | |
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