Angewandte Chemie International Edition

Cover image for Vol. 53 Issue 28

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, Zeitschrift für Chemie

45_12/2006Cover Picture: Biomimetic Fluorapatite–Gelatine Nanocomposites: Pre-Structuring of Gelatine Matrices by Ion Impregnation and Its Effect on Form Development / Intrinsic Electric Dipole Fields and the Induction of Hierarchical Form Developments in Fluorapatite–Gelatine Nanocomposites: A General Principle for Morphogenesis of Biominerals? (Angew. Chem. Int. Ed. 12/2006)

Form development......during growth of fluorapatite–gelatine nanocomposites is effected by pre-structuring of gelatine matrices by ion impregnation. The cover picture shows the hierarchical fractal aggregate (background), structural details of a fanlike aggregate, and a simulation of the “stiffening” effect on a protein molecule of Ca2+ ion incorporation. This effect is discussed by R. Kniep and co-workers in their Communication on page 1905 ff. A second paper on page 1911 ff. deals with the effect of intrinsic electric dipole fields on the form development of the nanocomposite materials.

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In their Minireview on page 1844 ff., H. Mayr and A. R. Ofial challenge the widely accepted reactivity–selectivity principle for organic reactions: Reactivity and selectivity of a species should exhibit opposite behavior—but it's not as easy as it sounds!


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