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1999 (1)
1978 (1)
1Author    Friedrich Bölsing, Assadollah HakimRequires cookie*
 Title    Präparative organische Chemie unter Verwendung einfach herzustellender Katalysatoren A Simple Method for Preparation of Catalysts for Preparative Organic Chemistry  
 Abstract    There are numerous simple chemical reactions in which reaction products arise, which compared with the materials at the outset, possess a considerably greater surface area. A significant example is the reaction of aluminium alcoholates with water. Reactions of this kind can, to a certain extent, be used as auxiliary reactions, in order to distribute other materials homogenously. In the chosen example, a material dissolved beforehand in the alcoholate, e.g. a solution of a metal salt, would be transferred in the course of the distributing reaction into the newly-developing structure of the reaction product. In this publication the application of some catalysts thus prepared to some classical organic chemical reactions is described by way of example. 
  Reference    Z. Naturforsch. 33b, 632—635 (1978); eingegangen am 9. Februar 1978 
  Published    1978 
  Keywords    Catalysts, Hydrogenation, Dehydrogenation, Dehydration 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0632.pdf 
 Identifier    ZNB-1978-33b-0632 
 Volume    33 
2Author    M. Soledad, Jim Énez, Agueda González-Rodríguez, Domingo MoralesRequires cookie*
 Title    Effect of Dehydration on the Photosynthetic Apparatus of Sun and Shade Leaves of Laurel Forest Trees  
 Abstract    In this work we study the effect of reduction in relative water content (RW C) on the chlorophyll fluorescence induction kinetics as well as on the membrane integrity, measured as electrolyte leakage, in sun and shade leaves of three Canarian laurel forest trees. No differences were found among the species and type of leaves, when the slow fluorescence kinetic parameters and electrolyte leakage were analyzed, values deviated from the normal ones at 70% and 40% RWC respectively. On the contrary, the photochemical efficiency of PSII was affected at higher values of RWC in sun leaves (90% and 52% RWC depending on the species) than in shade ones (40% RWC). These results indicate that the susceptibility of PSII to water deficit is different depending on species and environmental conditions where the leaves develop. 
  Reference    Z. Naturforsch. 54c, 704 (1999); received December 14 1998 
  Published    1999 
  Keywords    Relative Water Content, Chlorophyll Fuorescence, Laurel Forest Trees, Dehydration, Sun and Shade Leaves 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0704.pdf 
 Identifier    ZNC-1999-54c-0704 
 Volume    54