Spot the difference puzzles are sometimes known as 'Photo hunt' games. The goal is to find a number of differences between two near-identical images, which may be drawings, computer graphics, or photographs. SpotTheDifference.com offers you a massive selection of puzzles and games at all levels of difficulty.
The catalase test is used to differentiate staphylococci (catalase-positive) from streptococci (catalase-negative). The enzyme, catalase, is produced by bacteria that respire using oxygen, and protects them from the toxic by-products of oxygen metabolism.he catalase test is used to differentiate staphylococci (catalase-positive) from streptococci (catalase-negative). The enzyme, catalase, is produced by bacteria that respire using oxygen, and protects them from the toxic by-products of oxygen metabolism.
Without getting into the chemistry of it, it means that the donor was exceptionally hydrated at the time of the test, and the urine â and everything it contains â was diluted. If itâs positive-dilute, there was still a sufficient amount of drug in the urine to produce a positive result, so itâs still a positive. If itâs negative-dilute, however, thatâs often a different story. A common way to pass a drug test is to consume mass quantities of water so that urine runs clear.