The Carbohydrate Fermentation test uses Phenol Red Broth to test for the fermentation of different sugars. It is one of the fermentation tests, others include the Methyl Red test and the Voges-Proskauer test.
The main reason why we use hexadecimal numbers is because it is much easier to express binary number representations in hex than it is in any other base number system. Computers do not actually work in hex (donât laugh, beginning students do ask that question). Lets look at an example, using a byte.
The hexadecimal notation is almost universally used in computing - and not without a reason. There are sixteen hex digits - 0 to 9, and A to F (which correspond to decimal values 10 to 15), and each hex digit represents exactly four bits. Exactly two hex digits represent a byte, which can have a value from 00 to FF (that is from 0 to 255 decimal).