Word: molecular
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Gerald M. Edelman, 45, is an accomplished violinist who once chaired a symposium on the scientific basis of stringed instruments. He is better known as the discoverer of the molecular structure and composition of antibodies, the blood proteins that combat disease in the body. The 1972 Nobel laureate was born in New York City, educated at Ursinus College and the University of Pennsylvania Medical School. Now a specialist in immunology...
Ramsey receives both support and strong criticism in the same issue of the Hastings Center Studies from Dr. Leon Kass, a physician and molecular biologist who works in biomedical ethics. Kass takes issue with Ramsey's view of death as an "indignity," insisting instead that "to live is to be mortal." Jewish, if not Christian teaching has generally held that view, Kass says; evolutionary biology confirms and strengthens...
Died. Alfred Ezra Mirsky, 73, distinguished biochemist at New York City's Rockefeller University who in the 1940s helped spark the infant field of molecular biology by devising a technique for isolating the genetic material chromatin in the cells of animals; of a heart attack; in Manhattan...
...start, they are trying to make a rectifier, a simple device for changing the periodically reversing flow of electrons in alternating current (AC) into the one-way flow of direct current (DC). Like the cathode in ordinary vacuum tubes, one end of the molecular rectifier would act as a donor of electrons because it would be made out of a molecule that had a lower binding energy. The other end, carrying a higher binding energy, would serve as an anode, or electron acceptor. Thus, if an external alternating voltage were applied, the large molecule would act as a rectifier...
Achieving the precise spacing between donor and acceptor points to avoid the molecular version of a short circuit may be difficult, Aviram and Ratner admit. But, adds IBM Physicist Philip Seiden, chemists are already skilled at manipulating molecular structure and might be able to build molecular devices that will some day perform all the chores of today's tiny chips...