Example 1. The following spreadsheet uses the Excel Char function to return the character associated with different supplied character set numbers. Note that these results are from the Ansi character set (used on the Windows operating system).
Potassium tellurite agar is selective for the growth of Staphylococci and is somewhat selective for the growth of Corynebacteria. Staphylococci and Corynebacteria reduce the potassium tellurite in the agar, which makes the colonies grow black.
Glucose Salts Agar (GSA) : is a simple, defined medium. Only organisms that can make all their cellular components from glucose and inorganic salts are able to grow on this medium. Tryptic Soy Agar (TSA) : is a rich, undefined medium containing products of an enzymatic digest of protein and soy product.