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.
In the agar-water gel test, drops of potassium permanganate, potassium dichromate and methylene blue were simultaneously placed in separate wells in an agar plate. Methylene blue, with the largest molecular weight, had the smallest diameter (8.5 mm) and had the slowest diffusion rate (0.05 mm/min).