A total of 40 samples from carbonates and 8 samples from silicate rocks were analyzed from the Sangan iron skarn deposit to examine behavior of the oxygen and carbon isotopes. The higher values of ?18O are from metamorphic calcite and dolomite and lower ones are from granitic rocks. Although the ?18O and ?13C values of calcite and dolomite in marble yield the highest values in the Sangan deposi...

Stable isotopes have proved to be a transformative tool; their application to distinguish between two sources in a mixture has been a cornerstone of biogeochemical research. However, quantitatively partitioning systems using two stable isotopes (for example, (13)C and (12)C) has been largely limited to only two sources, and systems of interest often have more than two components, with interacti...

Monitoring of arthropods focuses typically on changes in population and range size over time. Yet, there are a myriad other aspects that could should be monitored under the ongoing global local environmental change. Stable isotope analysis, widely employed short-term ecological studies, has potential long-term monitoring arthropods. Here we discuss use stable isotopes terrestrial arthropods, pr...

Dynamics of lead metabolism were studied by replacement of a portion of the dietary lead with stable isotope tracers, and maintaining subjects on controlled diets for about 6 months. Results for one subject have been previously reported. Preliminary data are now available for a second subject. Although the data on the two subjects are basically similar, there are also significant differences. T...

stable isotopes of carbon, hydrogen, and nitrogen offer a number of advantages in clinical work: problems of preparation, storage, and disposal are negligible, health monitoring requirements are eliminated, and most significantly, the absence of radiochemical hazard to the patient permits their use in obstetric and pediatric measurements. It is our belief that the potential of stable isotope an...