966 resultados para Simon ben Yohai, 2d entury.


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by Samson Raphael Hirsch. Transl. by Bernard Brachman, together with a pref. and a biographical scetch of the author by the transl.

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The dynamic ligand exchange behavior of cationic arene ruthenium metalla-rectangles of the type [(pcymene) 4Ru4(OOXOO)2(NXN)2]4+ (OOXOO ¼ oxalato, 2,5-dioxydo-1,4-benzoquinonato, 5,8-dioxydo-1,4-naphthoquinonato; NXN ¼ 4,40-bipyridine-H8, 4,40-bipyridine-D8) has been studied in solution. The robustness of the rectangular architecture has been evidenced by NMR and ESI mass spectrometry. Thermodynamic and kinetic aspects of the ligand exchange process have been explored using 1H/2D isotope labeling of the 4,40-bipyridine connectors. This study shows that ligand exchange does not proceed spontaneously for these metalla-assemblies, even at high temperature, unless an external stimulus is applied.

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We study the phase diagram of the two-dimensional N=1 Wess-Zumino model on the lattice using Wilson fermions and the fermion loop formulation. We give a complete nonperturbative determination of the ground state structure in the continuum and infinite volume limit. We also present a determination of the particle spectrum in the supersymmetric phase, in the supersymmetry broken phase and across the supersymmetry breaking phase transition. In the supersymmetry broken phase, we observe the emergence of the Goldstino particle.

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Mose Ben Maimon. Arabisch u. deutsch mit Anm. von M. Wolff

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von Hirsch Hildesheimer