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1942 – gramicidin S, the first peptide antibiotic; 1942 – sulfadimidine; 1943 – sulfamerazine; 1944 – streptomycin, the first aminoglycoside [2] 1947 – sulfadiazine; 1948 – chlortetracycline, the first tetracycline; 1949 – chloramphenicol, the first amphenicol [2] 1949 – neomycin; 1950 – oxytetracycline; 1950 – penicillin G ...
In 1907 Alfred Bertheim synthesized Arsphenamine, the first man-made antibiotic. In 1927 Erik Rotheim patented the first aerosol spray can. In 1933 Robert Pauli Scherer created a method to develop softgels. William Roberts studies about penicillin were continued by Alexander Fleming, who in 1928 concluded that penicillin had an antibiotic ...
The supply situation improved, and 20 million units per day were made available for Allied invasion of Italy in September. [164] [165] During the campaign in Western Europe in 1944–1945, penicillin was widely used both to treat infected wounds and as a prophylactic to prevent wounds from becoming infected.
During the experiments when purification and biological activity tests of penicillin were performed in 1940, it was found that E. coli was unsusceptible. [73] The reason was discovered as production of an enzyme penicillinase (hence, the first β-lactamase known) in E. coli that easily degraded penicillin. [63]
In addition to P. notatum, newly discovered species such as P. meleagrinum and P. cyaneofulvum were recognised as members of P. chrysogenum in 1977. [19] To resolve the confusion, the Seventeenth International Botanical Congress held in Vienna, Austria, in 2005 formally adopted the name P. chrysogenum as the conserved name ( nomen conservandum ...
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Similar sandals found in Armenia are estimated to be 5,500 years old, while the shoes worn by “Ötzi the Iceman” — a prehistoric man found in Italy in 1991 — are dated to 5,300 years ago.
Archaeologists in Spain have unearthed a 2,100-year-old bronze hand that both astounded and puzzled experts. At the foot of a castle on Mount Irulegi , the invading ancient Roman army attacked and ...