Cross Coupling Reactions
Mostrando 13-18 de 18 artigos, teses e dissertações.
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13. The continuum in reactions with light exotic nuclei
One of the most striking features of dripline nuclei is their very low binding energy. The proximity to threshold implies that many of the standard reactions should take into account the possibility of the nucleus breaking up into the continuum and rearranging itself within the continuum, throughout the reaction process. Whereas for stable nuclei often struc
Brazilian Journal of Physics. Publicado em: 2003-06
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14. Sintese estereosseletiva do tamoxifeno, um agente antiestrogenico na terapia do cancer de mama
Tamoxifen is a non-steroidal antiestrogenic agent largely used in breast cancer therapy, particularly, in pacients with high risk to develop the disease after removal of the primary tumor. The structure of tamoxifen is relatively simple and could be reduced for synthetic purpose to a tetrasubstituted olefin. The (Z)-isomer (1) has antiestrogenic activity, wh
Publicado em: 2002
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15. Sintese e reatividade de complexos cis-bis(alquinila)platina(II) e clusters de ferro-platina
This thesis describes the results of the synthesis, characterisation and reactivity of cis-bis(alkynyl)platinum(II) complexes and iron-platinum clusters. The preparations of cis-bis(alkynyl)platinum(II) complexes were performed using terminal alkynes and [Pt(cod)Cl2] in reactions catalysed by copper(I) iodide. Posterior cod ligand substitution reactions gave
Publicado em: 2001
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16. Calculation of diffusion-limited kinetics for the reactions in collision coupling and receptor cross-linking.
Both enzyme (e.g., G-protein) activation via a collision coupling model and the formation of cross-linked receptors by a multivalent ligand involve reactions between two molecules diffusing in the plasma membrane. The diffusion of these molecules is thought to play a critical role in these two early signal transduction events. In reduced dimensions, however,
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17. Formation of Di-Isodityrosine and Loss of Isodityrosine in the Cell Walls of Tomato Cell-Suspension Cultures Treated with Fungal Elicitors or H2O2.
About 84% of the hydroxyproline residues in a cell culture of tomato (Lycopersicon esculentum x Lycopersicon peruvianum) were present in phenol-inextractable (i.e. covalently wall-bound) material. Treatment of the cells with any of three fungal elicitors (wall fragments from Phytophthora megasperma and Pythium aphanidermatum and xylanase from Aureobasidium p
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18. Energetics of syntrophic cooperation in methanogenic degradation.
Fatty acids and alcohols are key intermediates in the methanogenic degradation of organic matter, e.g., in anaerobic sewage sludge digestors or freshwater lake sediments. They are produced by classical fermenting bacteria for disposal of electrons derived in simultaneous substrate oxidations. Methanogenic bacteria can degrade primarily only one-carbon compou