https://sara-msilf.livejournal.com/ ([identity profile] sara-msilf.livejournal.com) wrote in [community profile] vaginapagina 2006-08-03 03:14 pm (UTC)

This is due to an enzyme in cells

called peroxidase. It is used to break down stuff that is used to kill bacteria with peroxide.

But older bloodstains won't do the cool bubbly thing - the enzyme will break down with time.

~Sara the Science Nerd, at your service.

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