Aqa biology - antibiotics helpWatch
A unique characteristic of Penicillium species is their capacity to survive at low temperatures. The growth rate of Penicillium is greatly reduced, but not to the extent of its competition, so as the temperature rises the Penicillium is able to rapidly grow over new areas. However, this period of initial growth can be slowed by the presence of other, competing microorganisms. Most molds will have been killed by the cold, but various bacteria may still be present. By releasing a chemical into the environment capable of destroying these bacteria, the competition is removed and growth of the Penicillium can carry on. This bacteria killing chemical is what we now recognize as penicillin. The anti-bacterial qualities of penicillin were originally discovered in 1929 by Sir Sanford Fleming.
Read more: Mold - Beneficial molds history - Production, Penicillium, Aflatoxin, and Grow - JRank Articles http://science.jrank.org/pages/4396/...#ixzz5Ay8Y9Dip