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A high‐throughput assay for screening modifiers of calcium oxalate crystallization
Author(s) -
Ramamoorthy Sriram,
Kwak Jun Ha,
Karande Pankaj,
Farmanesh Sahar,
Rimer Jeffrey D.
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15390
Subject(s) - crystallization , potency , chemistry , crystal growth , calcium oxalate , crystal habit , kinetics , aspartic acid , high throughput screening , oxalate , chromatography , materials science , crystallography , biochemistry , inorganic chemistry , amino acid , in vitro , organic chemistry , physics , quantum mechanics
Controlling crystal habit using growth modifiers provides novel avenues for tailoring properties of crystalline materials. Here, we report on the design of a high‐throughput screening assay for rapid identification of growth modifiers using calcium oxalate monohydrate crystallization as a model system. We conducted a systematic study of assay parameters (sample volume, shaking, and temperature) on crystallization kinetics. Crystallization half‐time (t 1/2 ), defined as the time at which crystallization is 50% complete, was obtained from the logistic fit of kinetic data and used as a measure of growth modifier potency. A test library of 13 peptides composed of aspartic acid and alanine residues was screened to determine their growth promotion or inhibition potentials. Leads identified from this study are in good agreement with ion‐selective electrode measurements and a single time point measurement of free calcium ion concentration is an excellent end‐point for evaluating modifier potency. © 2016 American Institute of Chemical Engineers AIChE J , 62: 3538–3546, 2016