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.
Vacuum-sealed products that are pasteurized have a refrigerator shelf life of two months but, once opened, should be treated like fresh fish and used within three days. Imitation crab sold in loose form in trays in fish cases will keep in the refrigerator three to five days.When frozen, they should be used within six months. Signs of spoiled imitation crab are similar to those of fish, Kishimoto said--foul fishy smell, slimy surface and sour taste.: Coconuts are best stored, refrigerated, at 32 to 35 degrees; they will keep well for one to two months. Address questions on food preparation to You Asked About, Food Section, The Times, Times Mirror Square, Los Angeles 90053.