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 is produced by strains of the fungus Penicillium notatum and P. chrysogenum. Most of the other antibiotics in clinical use are produced by actinomycetes, particularly streptomycetes (natural antibiotics). Other antibiotics are produced by chemical synthesis (synthetic antibiotics).etracyclines tetracycline, any of a group of antibiotics produced by bacteria of the genus Streptomyces. They are effective against a wide range of Gram positive and Gram negative bacteria, interfering with protein synthesis in these microorganisms (see Gram's stain)...... Click the link for more information.