File:A notebook page signed by Dorothy Fennell Alexander.jpg
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Summary
| Description |
English: A notebook page signed by Dorothy Fennell Alexander, an NRRL“penicillin survey” team member who worked to identify Penicillium mold strains that produced high amounts of penicillin under submerged culture conditions used by pharmaceutical companies. The circled strain, PS46 (later known as NRRL 1951), was the top performer and became the “mother” of all strains used commercially. |
| Date | |
| Source | https://www.ars.usda.gov/oc/images/photos/dec21/d4749-1/ |
| Author | United States Department of Agriculture |
Licensing
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This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:15, 12 February 2023 | | 495 × 640 (396 KB) | Hawkeye7 | Uploaded a work by United States Department of Agriculture from https://www.ars.usda.gov/oc/images/photos/dec21/d4749-1/ with UploadWizard |
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