Both of these effects confirm and extend the result of other studies. The third result was that in people who exercised, the loss of white matter integrity caused by alcohol consumption was prevented or reduced, depending on how much exercise was done and which particular white matter tract in the brain is examined.
Penicillin is one of the earliest discovered and widely used antibiotic agents, derived from the Penicillium mold. Antibiotics are natural substances that are released by bacteria and fungi into the their environment, as a means of inhibiting other organisms-it is chemical warfare on a microscopic scale.
Penicillin was discovered in 1928 by the Scottish scientist Sir Alexander Fleming accidentally when he was conducting experiments in his laboratory. He noticed that microbes i â¦ n some of his cultures were killed off by the growth of Penicillium mold.e didn't. Alexander Fleming discovered Penicillin but Florey and Chain developed it and also mass produced it. Fleming discovered penicillin in 1928 and Florey and Chain deve â¦ loped it during the second World War.