What compound is used to support frozen tissues?

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Multiple Choice

What compound is used to support frozen tissues?

For freezing and cryosectioning, you need a medium that stays solid at low temperatures and provides sturdy support for the tissue as you cut thin sections. OCT embedding compound is specifically designed for this purpose. It surrounds the tissue, freezes with it, and lets you obtain clean, uniform frozen sections in a cryostat. After sectioning, it can be removed with aqueous solutions so staining can proceed. Paraffin embedding medium is used for standard paraffin sections after dehydration and clearing, not for frozen tissues. Gelatin and agarose are gel-like matrices used in different contexts and don’t offer the same reliable support for cryosectioning as OCT.

For freezing and cryosectioning, you need a medium that stays solid at low temperatures and provides sturdy support for the tissue as you cut thin sections. OCT embedding compound is specifically designed for this purpose. It surrounds the tissue, freezes with it, and lets you obtain clean, uniform frozen sections in a cryostat. After sectioning, it can be removed with aqueous solutions so staining can proceed.

Paraffin embedding medium is used for standard paraffin sections after dehydration and clearing, not for frozen tissues. Gelatin and agarose are gel-like matrices used in different contexts and don’t offer the same reliable support for cryosectioning as OCT.

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