How marijuana affects the mind. Marijuana reaches the same pleasure centers in the brain that are targeted by heroin, cocaine and alcohol. Depending on the quantity, quality and method of consumption, marijuana can produce a feeling of euphoria â or high â by stimulating brain cells to release the chemical dopamine.
In 1928, Alexander Fleming made one of the most important contributions to the field of antibiotics. In an experiment, he found that a strain of green Penicillium mold inhibited the growth of bacteria on an agar plate. This led to the development of the first modern era antibiotic, penicillin.
Penicillium chrysogenum is the fungus from which penicillin, the first antibiotic medication, is made. The medical use for antibiotics, as the name suggests, is to cure diseases that are caused by bacteria.he medication that is made from Penicillium chrysogenum, however, has become less effective due to the development of bacterial strains that are resistant to treatment with penicillin. Many people in the medical community attribute the development of these resistant strains to improper use of antibiotics.