title: [Presence and role of trace elements in urinary calculi].
abstract: OBJECTIVE
  To assess the possible nature and role of trace elements in the pathogenesis of urinary stones.
  
  
  METHODS
  A series of 76 calculi from the East-Algerian region has been investigated through Fourier transform infrared spectroscopy for chemical analysis and X-ray fluorescence for detecting trace elements.
  
  
  RESULTS
  Among the detected trace elements, Zn, Sr, Pb, Cu, Rb and Se, only the first three had significant values. Overall, the calcium components, namely calcium oxalate and calcium phosphate, were the most loaded by these elements contrary to organic components such as uric acid and cystine, which had low contents.
  
  
  CONCLUSIONS
  The correlation of contents of Zn and Sr with the stone components (carbapatite, weddellite and whewellite) suggests an adsorption of these trace elements in the case of calcium stones rather than a catalytic process.
  
  
  METHODS
  3.
authors.affiliation: Faculté des sciences de la nature et de vie, université Constantine-1, 25017 Constantine, Algérie; Faculté des mathématiques et de l'informatique et des sciences de la matière, université 08 Mai 1945-Guelma, BP 401, 24000 Guelma, Algérie.
authors.forename: B
authors.initials: B
authors.lastname: Hannache
authors.affiliation: Laboratoire de biophysique, faculté de médecine, 23009 Annaba, Algérie.
authors.forename: A
authors.initials: A
authors.lastname: Boutefnouchet
authors.affiliation: CNRS-LCMCP-UPMC, collège de France, 11, place Marcelin-Berthelot, 75231 Paris cedex 05, France.
authors.forename: D
authors.initials: D
authors.lastname: Bazin
authors.affiliation: Service d'explorations fonctionnelles, hôpital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France. Electronic address: Michel.daudon@tnn.aphp.fr.
authors.forename: M
authors.initials: M
authors.lastname: Daudon
authors.affiliation: Laboratoire P.-Süe (CEA-CNRS)-Saclay, 91191 Gif-sur-Yvette cedex, France.
authors.forename: E
authors.initials: E
authors.lastname: Foy
authors.affiliation: Laboratoire de physique des solides, université Paris-XI, bâtiment 510, 91405 Orsay, France.
authors.forename: S
authors.initials: S
authors.lastname: Rouzière
authors.affiliation: EHS d'uro-néphrologie-Daksi, 25000 Constantine, Algérie.
authors.forename: A
authors.initials: A
authors.lastname: Dahdouh
mesh_terms: D006801:Humans; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D014131:Trace Elements / Q000032:analysis*; D014545:Urinary Calculi / Q000737:chemistry*
chemical_list: D014131:Trace Elements
keywords: Calculs urinaires; Fluorescence X; Trace elements; Urinary calculi; X-ray fluorescence; Éléments traces