<i>Parrotia persica</i> Yellow and Amber Leaves' Lipophilic Phytochemicals Obtained by Supercritical Carbon Dioxide Extraction.

persica yellow leaves with the Equation (1), which is as follows: Yield (%) = −0.841 + 0.053 X 1 + 0.041 X 2 + 0.607 X 3 − 0.00077 X 1 · X 1 − 0.00025 X 2 · X 2 − 0.1146 X 3 · X 3 − 0.00007 X 1 · X 2 + 0.01 X 1 · X 3 − 0.00375 X 2 · X 3 (1) The regression model for the total extraction yield was highly significant according to the p -value with the satisfactory coefficients of determination.

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