The isotopic analysis of boron from material that carries only trace amounts of boron requires low boron blank levels. Large efforts are taken to keep blank levels low by purifying reagents. We performed exposure experiments and determined procedure blanks before and after the air-handling system was modified from silicate glass filters to polyethylene/polystyrole and active carbon filters. Our...

Based on a study of 70 human cadavers (31 male, 39 female) and on cases described previously, we propose a new classification of the Martin-Gruber anastomosis, a neural connection between the median and ulnar nerves in the forearm. The anastomosis was found in 16 (22.9%) cadavers, being bilateral in three (18.7%) and unilateral in 13 (81.3%), five right and eight left. It occurred in eight (25....

Martin Rodbell, recipient of the Nobel Prize in Physiology or Medicine in 1994, passed away 7 December 1998 after a long illness. Rodbell had a long and distinguished career in research and senior leadership positions at the National Institutes of Health. At different times in his career, he conducted research at the National Heart Institute, the National Institute of Arthritis and Metabolic Di...

Address correspondence to: Ralph J. Martin, MD, PO Box 365067, San Juan, PR 00936-5067. Email: [email protected] Objective: Left ventricular (LV) function parameters have major diagnostic and prognostic importance in heart disease. Measurement of ventricular function with tomographic (SPECT) radionuclide ventriculography (MUGA) decreases camera time, improves contrast resolution, accuracy of...