Fig. 5. ANC-Co+2 degradation during storage under ultraviolet and daylight conditions. Each regression line indicates the correlation between the dependent variable (ln PRt, i.e., the natural logarithm of ANC-Co+2 retention after a specific storage time) and independent variable (storage time in days) for each light condition. R2 is the correlation coefficient (where 1.0 indicates a perfect fit). Each point represents the mean±standard deviation of three measurements.
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