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Effect of some amino acids and peptides on silicic acid polymerization.
MedLine Citation:
PMID:  11397635     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The polymerization of silicic acid in aqueous solutions at different pH was followed by the colorimetric molybdosilicate method. The role of four amino acids (serine, lysine, proline and aspartic acid) and the corresponding homopeptides was studied. All four amino acids behave the same way and favor the condensation of silicic acid. Peptides exhibit a stronger catalytic effect than amino acids but they appear to behave in very different ways depending on the nature of side-groups and pH. Poly-lysine and poly-proline for instance lead to the precipitation of solid phases containing both silica and peptides. The role of these biomolecules on the polymerization of silicic acid is discussed in terms of electrostatic interactions, hydrogen bonds and solubility.
Authors:
T Coradin; J Livage
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Colloids and surfaces. B, Biointerfaces     Volume:  21     ISSN:  1873-4367     ISO Abbreviation:  Colloids Surf B Biointerfaces     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-Jun-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9315133     Medline TA:  Colloids Surf B Biointerfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  329-336     Citation Subset:  -    
Affiliation:
Laboratoire de Chimie de la Matière Condensée, CNRS-UMR 7574, Université Pierre et Marie Curie, 4, Place Jussieu, F-75252 05, Paris Cedex, France
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