Electron attachment rates and gas phase acidities for the canonical tautomers of the nucleobases and electron affinities for thymine, deprotonated thymine, and cytosine are reported The latter are from a new analysis of published photoelectron spectra. The values for deprotonated thymine are (all in eV) keto-N1-H, 3.327(5); enol-N3-H, 3.250(5), enol-C2OH, 3.120(5) enol-N1-H, 3.013(5), and enol-C4OH,3.123(5). The values for deprotonated cytosine, keto-N1-H, 3.184(5); trans-NH-H, 3.008(5); cis-NH-H, 3.039(5); and enol-N1-H, 2.750(5) and enol-O-H, 2.950(5). The gas phase acidities from these values are obtained from these values using experimental or theoretical calculations of bond dissociation energies. Kinetic and thermodynamic properties for thermal electron attachment to thymine are obtained from mass spectrometric data. We report an activation energy of 0.60 eV and electron affinity of thymine, 1.0(1) eV.

This paper summarizes the first phase of a study in progress by a committee of the National Research Council's Board on Radioactive Waste Management. The Board initiated the study after observing that statutes and regulations administered by the federal and state agencies that control low-activity radioactive wastes have developed as a patchwork over almost 60 y. These controls usually reflect the enterprise or process that produced the waste rather than the waste's radiological hazard. Inconsistencies in the regulatory patchwork or its application may have led to overly restrictive controls for some low-activity wastes while others were neglected in comparison. In the first phase of this study, the committee reviewed current low-activity waste inventories, regulations, and management practices. This led the committee to develop five categories that encompass the spectrum of low-activity wastes and serve to illustrate gaps and inconsistencies in current regulations and management practices. The committee completed its first phase with four findings that will lead into the final phase of the study. This paper is excerpted from the committee's interim report that was issued in October 2003.

More than 167,000 m 3 of mixed waste, waste that contains both chemically hazardous and radioactive components, are in the known inventory at DOE sites that formarly produced nuclear defense materials.The inventory contains both mixed low level wastes (MLLW) and mixed transuranic wastes (MTRU).Site cleanup and decommissioning activities during the coming years are expected to nearly double this inventory.

From the Publisher:This workbook is designed to help you get work done. AML provides a wide variety of operations to complement ARC/INFO. AML programs organize ARC/INFO commands into sophisticated geoprocessing operations and AML menus provide the basis for combining these operations into a structured, easy-to-use graphical user interface. AML is a programming language which teaches you the programming concepts and techniques necessary to accomplish ARC/INFO tasks and solve application problems. Each lesson includes numerous examples as well as questions and exercises.

(1998). Measuring the real world: A textbook of applied statistics. International Journal of Environmental Health Research: Vol. 8, No. 1, pp. 91-91.

6. Chatters, R. M. and Olson, E. A., eds. 1965 6th International Conference on Radiocarbon and Tritium Dating. Pullman, Washington. Clearinghouse for Federal Scientific and Technical Information, National Bureau of Standards, U.S. Department of Commerce, Washington, DC. 7. Olsson, I. U., ed. 1970 Radiocarbon Variations and Absolute Chronology. Proceedings of the 12th Nobel Symposium and 7th International Radiocarbon Conference, Uppsala University, 1969. Stockholm, Almqvist & Wiksell and New York, John Wiley & Sons. 8. Rafter, T. A. and Grant-Taylor, T., eds. 1973 Proceedings of the 8th International Conference on Radiocarbon Dating. Lower Hutt, New Zealand, 1972. Wellington, New Zealand, Royal Society of New Zealand.

We report on a patient with mosaic tetrasomy 8p [46,XX/47,XX+i(8p)]. The patient has 2 fused vertebrae, abnormal ribs, congenital heart defects, agenesis of corpus callosum, hypotonia, and delayed development. The patient's developmental delays are most marked in receptive and expressive language skills, with more moderate delays on cognitive, sensorimotor, and motor skill testing. These findings are similar to those of the 3 previously reported patients with mosaic i(8p).

AbstractA model is presented that describes the changing melt viscosity of an epoxy laminating resin during its cure. The model incorporates chemical as well as physical factors. The predictions of the model are compared to experimental data using resin cured at several rates of heat‐rise, and at a fixed heat‐rise profile using resin preadvanced to different extents of reaction. Agreement is good, particularly at rapid heat‐rise rates, typical of those used in production.