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Publications associées (36)

The group of endo-permutation modules

The group D(P) of all endo-permutation modules for a finite p-group P is a finitely generated abelian group. We prove that its torsion-free rank is equal to the number of conjugacy classes of non-cyclic subgroups of P. We also obtain partial results on its ...

2000

Influence of cis-trans isomerisation on pentapeptide cyclisation

Cyclisation reactions on pentapeptides containing the turn promoting residues Gly and Pro are investigated. Although the cyclisation reaction is fast, solvent-dependent mixtures of cyclic penta- and decapeptides are observed. NMR studies suggest a strong d ...

1999

SNAr-based cycloetherification methodology: application in the synthesis of heterodectic macrocyclic peptides with endo aryl-aryl and aryl-alkyl ether bonds

Jieping Zhu

A review with 42 refs. on the synthesis of heterodectic macrocyclic peptides, focusing on ring closure by formation of aryl-aryl and aryl-alkyl ether bonds via the intramol. SNAr reaction. [on SciFinder (R)] ...

1999

The security of the birational permutation signature schemes

Serge Vaudenay, Jacques Stern

In recent years, researchers have invested a lot of effort in trying to design suitable alternatives to the RSA signature scheme, with lower computational requirements. The idea of using polynomial equations of low degree in several unknowns, with some hid ...

1997

Fast and precise computation of discrete Fourier Transforms using cyclotomic integers

Mohammad Amin Shokrollahi

Many applications of fast fourier transforms (FFT's), such as computer- tomography, geophysical signal processing, high resolution imaging radars, and prediction filters, require high precision output. The usual method of fixed point computation of FFT's o ...

1997

The effect of different functional groups on the ligand-promoted dissolution of NiO and other oxide minerals

Christian Ludwig

Sets of homologous ligands were used to probe the dissolution of oxide minerals through experiments on bunsenite (NiO). The ligand sets have primary amine, hydroxyl, and carboxyl functional groups and form five-membered, bidentate, ring complexes at the mi ...

Elsevier1996

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