Isotopic Tracers in Biology: An Introduction to Tracer Methodology, Third Edition focuses on stable isotopes, structures, composition, and reactions of nitrogen and oxygen, and radioactive tracers. The book first takes a look at atomic nuclei, radioactivity, and the production of radioactive isotopes and radiation characteristics of tracer atoms. Topics include nuclear reactions, general properties of nuclei, radioactivity, target techniques and radiochemistry, and beta and gamma radiations. The text also discusses isotopic assay, radiation hazards, procedures related with sample preparation for radioactive assay, and combustion of labeled materials. The manuscript examines the biochemical, physiological, and medical aspects of tracer methodology, as well as biochemical applications, value of tracer methods for biology, intermediary metabolism, and applications to clinical research. The text also ponders on the isotopes of hydrogen, carbon, oxygen, nitrogen, phosphorus, and sulfur. Concerns include assay of deuterium and tritium, short-lived and heavy stable carbon, and oxygen, nitrogen, sulfur, and phosphorus isotopes. The publication is a dependable reference for readers interested in isotopic tracers.