Table 1.
The morphology of γ-PGA/ε-PL hydrogels after swelling equilibrium in 0.1540 mol/L NaCl, CaCl2, and CrCl3 solutions.
| NaCl | CaCl2 | CrCl3 | |
|---|---|---|---|
| Form |  |
 |
 |
| Cross-section |  |
 |
 |
| Surface |  |
 |
 |
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