Fig. 1. Three-dimensional response surface plots depicting the interactions between alcohol concentration and pH (A), alcohol concentration and temperature (B), alcohol concentration and duration (C), pH and temperature (D), pH and duration (E), and temperature and duration (F) on cyanate degradation. The other two components (temperature, 15°C; alcohol concentration, 20%; storage duration, 6 days; pH, 3.5) are adjusted to their center values in each plot.
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