Apple cider vinegar is highly acidic, which enables it to self-preserve, but the flavor and appearance can evolve over time.

We detected Prm2, Tnp2 and GH1 using testes fixed in Carnoy's (60% ethanol, 30% chloroform, 10% acetic acid). Immunohistochemistry was performed on sections (5 μm). We used mouse monoclonal ...