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  Indian J Med Microbiol
 

Figure 2: Contour plots (a-c) and three-dimensional response surface plots (d-f ) showing the effects of variables (X1: pre-extraction time; X2: extraction temperature; X3: ratio of water to raw material) on the response Y (yield of Suillus granulatus polysaccharides)

Figure 2: Contour plots (a-c) and three-dimensional response surface plots (d-f ) showing the effects of variables (<i>X</i><sub>1</sub>: pre-extraction time; <i>X</i><sub>2</sub>: extraction temperature; <i>X</i><sub>3</sub>: ratio of water to raw material) on the response Y (yield of Suillus granulatus polysaccharides)