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Starch isolated from an under-utilized Liliaceae plant (Fritillaria ussuriensis Maxim.) was carboxymethylated. Influences of reaction parameters were investigated on the degree of substitution (DS). The optimal molar ratio of NaOH/AGU and MCA/AGU is 2.43 and 1.03, respectively. The highest values of the DS obtained when the carboxymethylation was performed at 60°C for 2.5h. Scanning electron microscopy...
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