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• W2045672024 abstract "No AccessJournal of UrologyInvestigative Urology1 May 1998THE INHIBITION OF CALCIUM OXALATE MONOHYDRATE CRYSTAL GROWTH BY MALEIC ACID COPOLYMERS K. BOUROPOULOS, N. BOUROPOULOS, M. MELEKOS, P.G. KOUTSOUKOS, G.C. CHITANU, A.G. ANGHELESCU-DOGARU, and A.A. CARPOV K. BOUROPOULOSK. BOUROPOULOS More articles by this author , N. BOUROPOULOSN. BOUROPOULOS More articles by this author , M. MELEKOSM. MELEKOS More articles by this author , P.G. KOUTSOUKOSP.G. KOUTSOUKOS More articles by this author , G.C. CHITANUG.C. CHITANU More articles by this author , A.G. ANGHELESCU-DOGARUA.G. ANGHELESCU-DOGARU More articles by this author , and A.A. CARPOVA.A. CARPOV More articles by this author View All Author Informationhttps://doi.org/10.1097/00005392-199805000-00107AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail The crystallization of calcium oxalate monohydrate (COM) was investigated at conditions of constant supersaturation both in the absence and in the presence of synthetic maleic acid copolymers at 37C, 0.15 M NaCl. The dependence of the rates of COM crystallization in the absence of inhibitors was found to be second order at low and first order at higher supersaturations suggesting a surface diffusion controlled mechanism. The presence of all copolymers tested at concentration levels up to 5 ppm retarded the rates of COM crystal growth up to 90%. The decrease of the COM crystal growth rates by the polymers depended on the nature of the comonomer polymerized with maleic acid and the order of inhibition was found to be vinyl acetate > N-vinylpyrrolidone > styrene. Taking into consideration kinetics data published in the literature concerning the inhibition of COM crystal growth, it is suggested that molecular weight also plays a role, with more inhibition at higher molecular weights. The morphology of the COM crystals grown was unaffected yet the crystals growing at lower rates in the presence of the copolymers were larger and their size more uniform. It is concluded that maleic acid copolymers are strong inhibitors of the crystallization of COM, the inhibitory activity being more pronounced in the case of the linear copolymers. References 1 : Crystallographic studies on the formation of renal calculi. Biochem. J.1971; 22: 6P. Google Scholar 2 : Calcium oxalate: crystallographic analysis in solid aggregates in urinary sediments. 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Google Scholar 38 : Influence of natural and synthetic inhibitors on the crystallization of calcium oxalate hydrates. World J. Urol.1992; 10: 216. Google Scholar 39 : The influence of some metallic ions and their complexes on the kinetics of crystal growth of calcium oxalate. J. Cryst. Growth1989; 94: 507. Google Scholar 40 : A new approach to studying inhibitors of calcium oxalate crystal growth. Urol. Res.1993; 21: 101. Google Scholar 41 : Crystal growth of calcium oxalate monohydrate. J. Crystal Growth1988; 87: 318. Google Scholar 42 : Influence of ionic strength on crystal adsorption and inhibitory activity of macromolecules. Br. J. Urol.1993; 71: 516. Google Scholar From the Department of Urology, School of Medicine, and the Department of Chemical Engineering, University of Patras, the Institute of Chemical Engineering and High Temperature Chemical Processes, Patras, Greece, and the Petru Poni Institute of Macromolecular Chemistry, Iasi, Romania.© 1998 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited byAssimos D (2018) Re: Molecular Modifiers Reveal a Mechanism of Pathological Crystal Growth InhibitionJournal of Urology, VOL. 197, NO. 2, (411-413), Online publication date: 1-Feb-2017. Volume 159Issue 5May 1998Page: 1755-1761 Advertisement Copyright & Permissions© 1998 by American Urological Association, Inc.MetricsAuthor Information K. BOUROPOULOS More articles by this author N. BOUROPOULOS More articles by this author M. MELEKOS More articles by this author P.G. KOUTSOUKOS More articles by this author G.C. CHITANU More articles by this author A.G. ANGHELESCU-DOGARU More articles by this author A.A. CARPOV More articles by this author Expand All Advertisement PDF downloadLoading ..." @default.
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