In general, yeasts are grown in the laboratory on solid growth media or in liquid broths. Common media used for the cultivation of yeasts include potato dextrose agar or potato dextrose broth, Wallerstein Laboratories nutrient agar, yeast peptone dextrose agar, and yeast mould agar or broth.
Defining Perforating. Connecting to the reservoir. Perforatingâthe act of blasting holes through steel casing, cement, and formation rockâlasts only an instant, but the long-term viability of most oil and gas assets depends upon it.
A perforated eardrum is a tear or hole in the ear's tympanic membrane (the medical name for your eardrum). A perforated eardrum is also sometimes called a ruptured eardrum. A perforated eardrum can really hurt. And if you can't hear as well as usual, it can be pretty scary.