Optimization extraction and characterization of <i>Artemisia ordosica</i> polysaccharide and its beneficial effects on antioxidant function and gut microbiota in rats.

Moreover, the model was highly significant ( Table 4 ), which indicated that the predicted model more highly illustrated the pattern of the interactions between variables. 24 By applying multiple regression analysis on the experimental data, the quadratic fitting linear regression equation for AOP extraction was as follows: Y = −20.3751 + 1.37973 A + 0.41990 B + 1.53956 C − 0.0005 AB + 0.0448475 AC + 0.0001625 BC − 0.050505 A 2 − 0.00344344 B 2 − 0.28566 C 2 , where Y denotes AOP extraction yield (%), A denotes the liquid–solid ratio (mL g −1 ), B denotes the extraction temperature (°C), and C denotes the extraction time (h).

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