Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming. People began using it to treat infections in 1942. There are several enhanced penicillin families which are effective against additional bacteria; these include the antistaphylococcal penicillins, aminopenicillins and the antipseudomonal penicillins. They are derived from "Penicillium" fungi. The term "penicillin" is often used generically to refer to benzylpenicillin (penicillin G, the original penicillin found in 1928), procaine benzylpenicillin (procaine penicillin), benzathine benzylpenicillin (benzathine penicillin), and phenoxymethylpenicillin (penicillin V). Procaine penicillin and benzathine penicillin have the same antibacterial activity as benzylpenicillin but act for a longer period of time. Phenoxymethylpenicillin is less
Valentine S. McClatchy for Mexicans to gain a classification of their race to ensure they would not be able to be exempt from the 1924 Immigration Act. In 1937, he lobbied to strip Kibei, Japanese Americans born in the United States who were sent to Japan to study or visit family for an extended time, of their citizenship if they had been in Japan for more than a year. He died of a heart condition on May 15, 1938. Valentine S. McClatchy Valentine Stuart McClatchy (August 29, 1857 – May 15, 1938) was an American newspaper owner and journalist. As publisher of "The