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. 2021 Feb 24;13(5):677. doi: 10.3390/polym13050677

Table 1.

Independant responses with their respective levels.

Factors (Independent Variables) Levels
Low (−1) Medium (0) High (+1)
  • (A)

    CS * conc (%)

0.05 0.15 0.25
  • (B)

    CS solution pH

3 4 5
  • (C)

    Mass ratio CS:TPP

2:1 4:1 6:1

* CS: Chitosan.