The Effect of Urate on Calcium Oxalate Precipitates
Despite numerous investigations, the role of uric acid in calcium oxalate monohydrate (COM) lithiasis is still speculative. Heterogeneous nucleation and epitaxial growth, specific adsorption of COM growth inhibitors, and salting out effects have been suggested to explain the apparent influence of uric acid and urates on the precipitation of COM1. Coprecipitation and mixed crystal formation of COM with urates have also been proposed, based upon the comparison of crystallographic data2. Evidence for epitaxial growth of COM on uric acid and sodium hydrogen urate (NaHU) has been presented3. In this paper we describe co-precipitation and mixed crystal formation experiments of COM with Ca(HU)2.
KeywordsUric Acid Epitaxial Growth Heterogeneous Nucleation Calcium Oxalate Seed Crystal
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