Abstract
In the investigation of the role of vitamin B 6 deficiency in the formation of calcium oxalate stones in stone-forming patients, a modified Fisher Nefluorophotometer was utilized to measure rates of appearance of precipitates and the nucleation time in their units. Preliminary work in pure aqueous systems with added urinary constituents showed that several ions diminish the rate of formation of calcium oxalate, and these results were found to hold in normal urine systems. Citrate was, however, considerably more effective in slowing the rate in urine than in water. Accelerated rates of formation of calcium oxalate by abnormal urines are found quite uniformly. Nucleation times are somewhat shortened by magnesium as well as citrate ions. Oxalate concentration seems to be, however, dominant over the other two. There does not seem to be any significant shortening of nucleation time in abnormal urines.
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