Fig. 1From: Preparation and characterization of polymyxin B- and histidine-coupled magnetic nanoparticles for purification of biologics from acquired endotoxin contaminationPareto chart showing analysis of results of fractional factorial design for preparation of MNPs using Minitab 2010, ver. 16.1.1, the result analysis indicated that the concentration of dextran solution had a significant effect on the PDI beside the pH and temperature of incubation, both had a significant effect on the PDIBack to article page