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A focus on function

✍ Scribed by Aliberti, Julio; Reis e Sousa, Caetano; Schito, Marco; Hieny, Sara; Wells, Timothy; Huffnagle, Gary B.; Sher, Alan


Book ID
109828451
Publisher
Nature Publishing Group
Year
2000
Tongue
English
Weight
72 KB
Volume
25
Category
Article
ISSN
1061-4036

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✍ Mark A. Ditzler; Elvin A. AlemΓ‘n; David Rueda; Nils G. Walter πŸ“‚ Article πŸ“… 2007 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 1022 KB

## Abstract The ability of RNA to catalyze chemical reactions was first demonstrated 25 years ago with the discovery that group I introns and RNase P function as RNA enzymes (ribozymes). Several additional ribozymes were subsequently identified, most notably the ribosome, followed by intense mechan

A note on focus-focus singularities
✍ Nguyen Tien Zung πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 462 KB

We give a topological and geometrical description of focus-focus singularities of integrable Hamiltonian systems. In particular, we explain why the monodromy around these singularities is non-trivial, a result obtained before by J.J. Duistermaat and others for some concrete systems.