Carbon dating arts centre
He used carbon-11 that he made in the Berkeley cyclotron to trace chemical and biochemical processes but was limited by the short half-life (21 minutes) of this nuclide.
The existence of the nuclide carbon-14 had been postulated since 1934, but it had never been directly observed nor characterized.
Wikipedia Sitting in Apuseni Natural Park, Coliboaia Cave houses Central Europe’s oldest cave paintings, dating as far back as 35,000 years BP.
It’s estimated that the Aurignacian and Gravettian cultures may be responsible for the cave’s art as their creation would have been consistent with these cultures’ presence during the Paleolithic period.
With keen scientific intuition, he chose to use bacteria instead of green plants as test organisms.
This change, related to his earlier studies on bacteria at Berkeley, was influenced also by his familiarity with the attitudes of comparative biochemistry, a viewpoint that emphasizes general biochemical and evolutionary relationships and 'guides research accordingly.
He continued his study of photosynthesis and cytochromes (the respiratory proteins basic to reduction of oxygen) using carbon-14 as a tracer by collaborating with biochemists throughout the university.
During, the 1950s and 1960s, his studies on the metabolism of photosynthetic bacteria resulted in a number of important discoveries, notably nitrogen fixation and the photoevolution of molecular hydrogen (with H. After he and Leo Vernon discovered the C-tvpe cytochronie in anaerobic bacteria, he began a series of pioneering researches on bacterial iron proteins.
Gest, a graduate student at the time), and the so-called suicide procedure; to trace mechanisms of DNA duplication (with A. They performed the first characterization of a bacterial cytochrome and from this there emerged a wholly new area - the comparative biochemistry of cytochromes - which stimulated discoveries of many new classes of iron proteins. Kettering Award for Excellence in Photosynthesis (1968), the Merck Award of the American Society of Biological Chemists (1982), and the Einstein Award of the World Cultural Council (1990). Kamen was a member of the National Academy of Sciences, the American Academy of Arts and Sciences, and the American Philosophical Society.
These studies, ranging over the whole field of microbiology stimulated a rapidly expanding series of studies in the laboratories of his collaborators and others.
In 1947 he wrote what immediately became the primary reference work for several decades on the use of radioactive tracers, .