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Table 1 Overview of the effects and interactions of pretreatment factors

From: Low temperature lignocellulose pretreatment: effects and interactions of pretreatment pH are critical for maximizing enzymatic monosaccharide yields from wheat straw

Response Fraction Acid/alkali pH T t pH·T pH·pH T·t
Glucose Solid Acidic   x   x x -
  Liquid Acidic -      -
Xylose Solid Acidic x x   x x  
  Liquid Acidic x      
Lignin Solid Acidic       x
Glucose Solid Alkaline x    x x  
  Liquid Alkaline x x     x
Xylose Solid Alkaline x   -   x  
  Liquid Alkaline x   x x x  
Lignin Solid Alkaline x    x x  
  1. Significance of the pretreatment factors: pH, temperature (T), holding time (t) and their interactions on the responses enzymatic glucose release, enzymatic xylose release, and on lignin removal from the solid fraction. The significance estimates are based on multivariate linear regression of the responses (glucose and xylose releases) obtained after the standardized enzymatic hydrolysis treatment of samples obtained from the two sets of experimental designs, that is, acidic and alkaline.
  2. x = P < 0.05; - = P < 0.10.