The third part is about the second drying (SD). The second part of the solvent immersion - vacuum dried specimens, re immersion in ethanol, methanol, isopropanol, cyclohexane and acetone, deionized water, 5% sodium chloride, 5% sodium sulfate solution as the control group. After 7 days, it was dried again in vacuum, and then MIP and NAD were tested respectively.<br>
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