The inhibition effect of Lens culinaris on the calcium oxalate crystallization is studied. The inhibiting effect of three concentrations (0.5, 1and 1.5 mg/mL) of methanolic extract is studied in vitro in artificial urine model. The turbidimetric parameters were given such as turbidimetric slopes of graph, the coefficient of variation CV % and the rate of inhibition I % for each test. The result showed that Lens culinaris extract presents a higher inhibiting effect at rate of 12.5 % at concentration of 1 mg/ml. In all present tests, the values of the coefficient of correlation (R) are found to be higher than 0.90 and the values of the coefficient of variation are lower has 10 %, which reassures the reliability and the reproductiveness of present model.
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