This study modified certain existing techniques used in the
determination of the radiation exposure to various anatomical structures
of the gastro-intestinal tract during fluoroscopic examinations.
Monitoring films were attached directly to the patient during the
routine upper gastro-intestinal examination, instead of placing the
films on the panel of the fluoroscope....
Current stream tracer techniques do not allow separation of in-channel dead zone (e.g., eddies) and out-of-channel (hyporheic) transient storage, yet this separation is important to understanding stream biogeochemical processes. We characterize in-channel transient storage with a rhodamine WT solute tracer experiment in a 304 m cascade-pool-type bedrock reach with no...