Zinc oxide is the metal zinc that has been oxidized. The chemical formula is ZnO, 1 zinc atom and 1 oxygen atom held together by an ionic bond. Zinc oxide does occur in nature as the mineral zincite, but it is quite rare and commercially unavailable.
I have done a few stool samples in my time and have always just stored them in the fridge, until the next day to take them into the docs. Good luck hun I hope they get it sorted.
For every 20 minutes over two hours your food sits at room temperature, the level of bacteria doubles in quantity, so donât procrastinate! Leftovers can safely keep for 3 to 4 days in the refrigerator, or 3 to 4 months in the freezer. Follow the following USDA guidelines for handling leftovers safely: