Con el paso del tiempo el agua oxigenada del botiquín deja de ser desinfectante porque se transforma en agua y oxígeno, dado que el oxígeno escapa de la botella. ¿que tupo de cambio se ha producido?

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.