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.
It is always best to freeze lard once and never again after that. Defrosted lard can keep in the refrigerator safely without spoiling for up to 6 months. However, if it begins smelling rancid before 6 months it is wise to toss it out and go get some new lard to use to prevent food poisoning from occurring.t is always best to freeze lard once and never again after that. Defrosted lard can keep in the refrigerator safely without spoiling for up to 6 months. However, if it begins smelling rancid before 6 months it is wise to toss it out and go get some new lard to use to prevent food poisoning from occurring.