方法：利用自制的装置，先将猪皮经负压处理，去除起泡后的表皮，然后利用离子型去污剂的渗透压梯度作用去除真皮内的细胞成分。
Methods the pig skin was treated with negative pressure by a self-made device to remove the blistered epidermis, then dermal cells were removed by ion detergent with osmotic pressure gradient effects.
盐度梯度是一种技术，利用了盐和淡水之间渗透压的差异优势。
Salinity Gradient is a technology that takes advantage of the osmotic pressure differences between salt and fresh water.
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