5x3 Index card signed "Ability, hard work and a bit of luck are necessary for success Rosalyn Yalow" in black ink. Excellent condition. (1921-2011) Rosalyn Sussman Yalow was an American medical physicist and a co-winner of the 1977 Nobel Prize in Physiology or Medicine (together with Roger Guillemin and Andrew Schally) for the development of the radioimmunoassay technique. She was the second woman (after Gerty Cori), and the first American-born woman, to be awarded the Nobel Prize in Physiology or Medicine. In 1977, Yalow was the sixth individual woman (seventh overall, considering Marie Curie's two wins), and the first American-born woman, to win the Nobel Prize in a scientific field. She was also the second woman in the world to win in the physiology or medicine category (the first was Gerty Cori). Yalow was honored for her role in devising the radioimmunoassay technique, along with Roger Guillemin and Andrew V. Schally for their research in another field. By measuring substances in the human body, the screening of the blood of donors for such diseases as hepatitis was made possible. Radioimmunoassay can be used to measure a multitude of substances found in tiny quantities in fluids within and outside of organisms (such as viruses, drugs, and hormones). The list of substances is endless, but specifically, it allowed blood donations to be screened for various types of hepatitis. The technique can also be used to identify hormone-related health problems. Further, it can be used to detect in the blood many foreign substances including some cancers. Finally, the technique can be used to measure the effectiveness of dose levels of antibiotics and drugs.Comes with a full Letter of Authenticity from Todd Mueller Authentics.