978 resultados para Nebuchadnezzar II, King of Babylonia, d. 562 B.C.


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Mode of access: Internet.

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Mode of access: Internet.

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The new anionic functionalized aryldiamine ligands [2,6-(Me(2)NCH(2))(2)-4-R-C6H2](-) (R = Me(3)SiC=C, C6H5, Me(3)Si), formally derived from [2,6-(Me(2)NCH(2))(2)C6H3](-), have been prepared as their lithium compounds. The compound [Li{2,6-(Me(2)NCH(2))(2)-4-Ph-C6H2}](2) crystallizes in the monoclinic space group C2/c (no. 15) with a = 13.1225(5), b = 13.5844(7), c = 15.9859(12) Angstrom, beta = 105.329(5)degrees, V = 3264.0(3)Angstrom(3), Z = 4. The structure refinement converged to R(1) = 0.0374 for 2037 observed reflections [F-o>4 sigma(F-o)] and wR(2) = 0.0922 for 2560 unique data. The organolithium compounds have been used in transmetalation reactions to give the corresponding functionalized organoruthenium(II) complexes [Ru-II{2,6-(Me(2)NCH(2))(2)-4-R-C6H2}(terpy)]Cl-+(-) (terpy = 2,2';6',2 ''-terpyridine). The Ru-II species with R = HC = C has also been synthesized.

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A survey of existing data suggests that trophoblast cells produce factors involved in extracellular matrix degradation. In this study, we correlated the expression of cathepsins D and B in the murine ectoplacental cone with the ultrastructural progress of decidual invasion by trophoblast cells. Both proteases were immunolocalized at implantation sites in lysosome-endosome-like compartments of trophoblast giant cells. Cathepsin D, but not cathepsin B, was also detected ultrastructurally in extracellular compartments surrounded by processes of the invading trophoblast containing extracellular matrix components and endometrial cell debris. The expression of cathepsins D and B by trophoblast cells was confirmed by RT-PCR in ectoplacental cones isolated from implantation chambers at gestation day 7.5. Our data addressed a positive relationship between the expression and presence of cathepsin D at the extracellular compartment of the maternal-fetal interface and the invasiveness of the trophoblast during the postimplantation period, suggesting a participation of invading trophoblast cells in the cathepsin D release. Such findings indicate that mouse trophoblast cells might exhibit a proteolytic ability to partake in the decidual invasion process at the maternal-fetal interface. Copyright (C) 2010 S. Karger AG, Basel

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The fons primarius of Plutarch's life of Fabius Maximus. -- The common Greek sources of Plutarch and Appianus for Roman history. -- King Juba's Historia romana.

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"Translated from the French by Thomas Holcroft."

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Reprint. Originally published: London : s.n., 1871.

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Patellamide D (patH(4)) is a cyclic octapeptide isolated from the ascidian Lissoclinum patella. The peptide possesses a 24-azacrown-8 macrocyclic structure containing two oxazoline and two thiazole rings, each separated by an amino acid. The present spectrophotometric, electron paramagnetic resonance (EPR) and mass spectral studies show that patellamide D reacts with CuCl, and triethylamine in acetonitrile to form mononuclear and binuclear copper(II) complexes containing chloride. Molecular modelling and EPR studies suggest that the chloride anion bridges the copper(II) ions in the binuclear complex [Cu-2(patH(2))(mu-Cl)](+). These results contrast with a previous study employing both base and methanol, the latter substituting for chloride in the copper(II) complexes en route to the stable mu-carbonato binuclear copper(II) complex [Cu-2 (patH(2))(mu-CO3)]. Solvent clearly plays an important role in both stabilising these metal ion complexes and influencing their chemical reactivities. (C) 2004 Elsevier Inc. All rights reserved.

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ed. with transl. and notes by A. Cowley

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Vol. 2 cite as: P.Col. IV