Assertion: polysaccharide's modification | /r/HasProperty | figure 1
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text: So far, there have been dozens of molecular modification methods, including carboxymethylation (Chen and others 2014a ), sulfation (Wang and others 2013a ), selenylation (Qiu and others 2014a ), phosphorylation (Yeand others 2013 ), ultrasonic disruption (Zhang and others 2013a ), and the degradation of polysaccharides, which are generally classified as chemical, physical, and biological modifications (Figure 1 ).