Iodine is a trace element required by the body for an increasing number of identified physiologic functions. This element belongs to the halogen family of elements, a group of highly reactive nonmetals that includes fluorine, chlorine, bromine, and astatine. Iodine is found naturally in large amounts in seafood such as kelp and saltwater fish. Most iodine intake in the United States is from iod...

Angiotensin-converting enzyme (ACE) was isolated from detergent-derived extracts of human intestinal brush-border membranes (BBMs) by immunoprecipitation using a monoclonal antibody. Analysis of the immunoprecipitates by SDS/PAGE revealed a polypeptide of apparent M(r) 184,000 under reducing and non-reducing conditions, indicating that ACE does not contain intermolecular disulphide bridges. The...

While transferring energy between the collective and intrinsic degrees of freedom of the system, viscosity intricately influences nuclear dynamics. Fission of highly excited spherical nuclei provides optimal conditions for probing this dissipation phenomenon. In nuclei, when the system is initially well-localized around its spherical ground-state minimum, any shape evolution is exclusively init...