The electron affinities of deprotonated adenine, guanine, cytosine, uracil, and thymine.

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.

Improving the regulation and management of low-activity radioactive wastes.

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.