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- W2050144317 abstract "In a recent issue of<i>Science</i><sup>1</sup>it was reported that gonorrhea had been successfully treated with single injections of 100,000 units of commercial penicillin incorporated in a beeswax-peanut oil base. For the past several months we have had an opportunity to investigate the properties of so-called penicillin X,<sup>2</sup>sometimes referred to as factor X, or allopenicillin. This material was furnished to us by three manufacturers.<sup>3</sup>A small amount of crystalline penicillin X<sup>4</sup>was also made available to us. When assayed by the cup-plate method<sup>5</sup>the potency of crystalline penicillin X is approximately 900 units per milligram, while crystalline penicillin<sup>6</sup>has a potency of 1,650 units per milligram. In addition, in vitro studies (serial dilution) show that penicillin X is more effective than commercial penicillin against a strain of Klebsiella pneumoniae type A and a strain of Bacillus cereus. No difference in effect could be" @default.
- W2050144317 created "2016-06-24" @default.
- W2050144317 creator A5008127178 @default.
- W2050144317 date "1944-12-16" @default.
- W2050144317 modified "2023-09-27" @default.
- W2050144317 title "PENICILLIN X" @default.
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- W2050144317 doi "https://doi.org/10.1001/jama.1944.02850510032007" @default.
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