Stahl, Frank

Solutions of aiyl-substituted vinyl cations have been reported to be stable for at least a short time at low temperatures. The NMR spectra have been obtained Abram, T.S. Watts, W.E. J. Chem. Soc., Chem. Commun., 1974, 857 Siehl, H. Carnahan Jr., J.C. Eckes, L. Hdnack, M. Angew. Chem. Int. Ed. Engl., 1974, 13, 675. The 1-cyclobutenyl cation has been reported to be stable in the gas phase Franke, W. Schwarz, H. Stahl, D. J. Org. Chem., 1980, 45, 3493. See also Siehl, H. Koch, E. J. Org. Chem., 1984, 49, 575. 

As the field of molecular genetics grew, the DNA molecule became the focus of many research efforts. Francis Crick and George Gamov developed the sequence hypothesis to explain how DNA makes protein. They stated that the DNA sequence specifies the amino acid sequence of a protein and postulated the central dogma of molecular genetics the flow of genetic information is a one-way road, it always takes the direction from DNA to RNA to protein [16]. In the same year, 1957, Mathew Meselson and Frank Stahl demonstrated the replication mechanism of DNA [17]. In 1958, DNA polymerase became the first enzyme used to make DNA in a test tube. 

For an excellent background to the Oxford scientific community 1648-1660 see Robert G. Frank, Jr., Harvey and the Oxford Physiologists A Study of Scientific Ideas, University of California Press, Berkeley, Los Angeles, London, 1980,45-62. Also W. N. Hargreaves-Mawdesley, Oxford in the Age of John Locke, University of Oklahoma Press, 1972, 78-94. Locke, a man of turbulent spirit, and clamorous. . . was a disruptive influence at Peter Stahl s [Sthael] Chemistry lectures in 1663 The Life and Times of Anthony Wood, Antiquary of Oxford, 1632-1695, described by himself, ed. Andrew Clark, Oxford Historical Society, Clarendon Press, 1891, vol. I, 472. 

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