<i>Rana chensinensis</i> Ovum Oil Based on CO₂ Supercritical Fluid Extraction: Response Surface Methodology Optimization and Unsaturated Fatty Acid Ingredient Analysis.

According to the results shown in Table 2 , in the linear terms, pressure (X 1 ), flow (X 2 ), and time (X 4 ) had extremely significant ( p < 0.0001) effects on the yield of RCOO, while the temperature term (X 3 ) was not significant ( p = 0.9802), so its effect on the yield of RCOO was very small.

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