NH3 is an essential molecule as a nitrogen source for prebiotic amino acid syntheses such as the Strecker reaction. Previous shock experiments demonstrated that meteorite impacts on ancient oceans would have provided a considerable amount of NH3 from atmospheric N2 and oceanic H2O through reduction by meteoritic iron. However, specific production mechanisms remain unclear, and impact velocities...

* J.D. 1970, Creighton University; Associate, Ross & O'Connor, Omaha, Nebraska; Lecturer in Law, Creighton University School of Law; Visiting Lecturer, Constitutional Law, University of Nebraska-Omaha; Plaintiff's Attorney, Horacek v. Exon. ** M.D. 1957, University of Nebraska; Professor of Psychiatry and Pediatrics, University of Nebraska College of Medicine; President, National Association fo...

Dissection of the external iliac artery is a very rare complication following transplantation of a renal allograft. Two cases have been described by Merkus et al. [1], which were related to previous trauma. Esteban et al. [2] reported non-traumatic dissection of the external iliac artery in a patient, which was successfully treated by Strecker stent insertion. In a series of 90 living related k...

Computation and Incentives in Social Choice (Dagstuhl Seminar 12101) Edith Elkind, Christian Klamler, Jeffrey S. Rosenschein, and M. Remzi Sanver . . 1 Normative Multi-Agent Systems (Dagstuhl Seminar 12111) Giulia Andrighetto, Guido Governatori, Pablo Noriega, and Leon van der Torre . . 23 Applications of Combinatorial Topology to Computer Science (Dagstuhl Seminar 12121) Lisbeth Fajstrup, Dmit...

Hen ovomucoid is characterized by a high degree of microheterogeneity of its carbohydrate moieties, as was recently demonstrated by hydrazinolysis in combination with high performance liquid chromatography (Paz Parente, J., Strecker, G., Leroy, Y., Montreuil, J., and Fournet, B. (1982) J. Chromatogr., in press). This approach resulted in 17 oligosaccharide-alditol fractions; the major one could...