نتایج جستجو برای: modified ritter reaction
تعداد نتایج: 651029 فیلتر نتایج به سال:
Porous clay heterostructures (PCH) based on modified montmorillonite were synthesized using different reaction conditions (different hydration degrees, pH values and reaction times). The PCH precursors and PCH were characterized using FTIR Spectroscopy and X-Ray Diffractions (XRD). The XRD results showed that basal distance of porous clay heterostructures was significantly influenced by the mod...
The direct three component modified Mannich reaction via condensation of aldehydes, 2-naphthol or 2,7-naphthalendiol and piperidine to generate Betti bases has been carried out over L-proline (20 mol%) with high efficiency under solvent free conditions at 70 OC. Also, the reaction of aromatic aldehyde and 4-hydroxycoumarin in the presence of L-proline (20 mol%) in the ethanol under reflux condi...
and helpfully illustrated, this volume provides an introductory overview of the thymus at a single short reading. The immunological biases of the authors, however, pervade the text. Of the book's six chapters, Ritter and Crispe devote only one to a truly developmental biological discussion. The remaining chapters focus on T-cell ontogeny, from the viewpoints of "Thymocyte populations and dynami...
P. Nordbeck, O. Ritter, I. Weiss, D. Gensler, M. Warmuth, V. Herold, P. M. Jakob, M. E. Ladd, H. H. Quick, and W. R. Bauer Internal Medicine I, University of Würzburg, Würzburg, Germany, Experimental Physics V, University of Würzburg, Würzburg, Germany, Biotronik GmbH & Co. KG, Berlin, Germany, Diagnostic and Interventional Radiology, University of Duisburg-Essen, Essen, Germany, Medical Physic...
Senior Research Assistant, and Vice President and Economist, respectively, Federal Reserve Bank of Boston. The authors thank Lynn Browne, Richard Kopcke, and Scott Schuh for helpful comments, Joe Ritter for access to the gross worker flows data, and Dan Feenberg at the National Bureau of Economic Research for help in obtaining MORG data. Shifts in the Beveridge Curve, Job Matching, and Labor Ma...
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