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Tissue-Tek machine | by joebeone
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Tissue-Tek machine

Tissue has a lot of water in it... and to preserve the tissue, the water must be replaced with formaldehyde. However, that can't be done instantaneously. This machine takes tissue from one state to the other in a series of smaller steps so that the resulting tissue is ready for slide making.

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Taken on December 23, 2006