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May 9, 2024 · Role In: Pugwash Conferences. Dorothy Hodgkin (born May 12, 1910, Cairo, Egypt—died July 29, 1994, Shipston-on-Stour, Warwickshire, England) was an English chemist whose determination of the structure of penicillin and vitamin B 12 brought her the 1964 Nobel Prize for Chemistry.
May 9, 2024 · Australian pathologist Howard Florey and British biochemist Ernst Boris Chain isolated and purified penicillin in the late 1930s, and by 1941 an injectable form of the drug was available for therapeutic use. (Read Alexander Fleming’s 1929 Britannica essay on antiseptics.)
- The Editors of Encyclopaedia Britannica
May 14, 2024 · The story behind the discovery of the first antibiotic, penicillin, is a fascinating one. In 1928, Scottish scientist Alexander Fleming was working in his laboratory at St. Mary’s Hospital in London, England. He was studying staphylococci bacteria, which caused serious infections in wounds and other areas of the body.
2 days ago · Key:RMRCNWBMXRMIRW-WYVZQNDMSA-L Y. Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
- Readily absorbed in distal half of the ileum.
- liver
- C₆₃H₈₈CoN₁₄O₁₄P
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May 4, 2024 · The total synthesis of the complex biomolecule vitamin B 12 was accomplished in two different approaches by the collaborating research groups of Robert Burns Woodward at Harvard and Albert Eschenmoser at ETH in 1972.
2 days ago · Microbiological assay of Penicillin Microbiological assay of Streptomycin Microbiological assay of Vitamin B2 Microbiological assay of Vitamin B12. Standardisation of vaccines and sera. 10 Study of infectious diseases: Typhoid, Tuberculosis, Malaria, Cholera, Hepatitis, Meningitis, Syphilis & Gonorrhea and HIV. > Pharmaceutical microbiology ...
2 days ago · 6% (< 60 years old), 20% (> 60 years old) [4] Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [5] Symptoms can vary from none to severe. [1] Mild deficiency may have few or absent symptoms. [1]
