Living · 6 pages · 12 min

Why mother of vinegar is a film

The mother is a cellulose mat that holds air-loving acetic bacteria at the surface.

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From the opening

A mother of vinegar is a film on the liquid, built by acetic acid bacteria that need oxygen and so live where the air is. They secrete cellulose that traps them in a mat, and that mat is what you see, not a skin of spoiled fat. The opening covers bacteria that need oxygen at the top, cellulose as the visible raft, and why sunk layers still form.

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Inside

  • Bacteria that need oxygen at the top
  • Cellulose as the visible raft
  • Why sunk layers still form
  • How a fuzzy mold looks different
  • Where the idea stops applying
  • A distinction worth keeping

Sources

  • Cellulose pellicle of acetic acid bacteria
  • Surface growth where ethanol meets oxygen