I have already fixed the tissues in 10% NBF for 24 hours. Now I have kept the tissue in PBS. Whats next can I store like this for longer period or I have to embed all the tissues in OCT today only.
Dear Dr. Gordon, thanks for the suggestion, but I wanted to know is there anyway to store in some chemical like 70% Ethanol like we do in parafin embedded block preparation.
There really is none. All solutions will extract the tissues over time. Any alteration due to prolonged storage changes the ultrastructure morphology and it's easily seen in EM microgaphs. If such a procedure existed, I'm sure a literature search would find have found it.