Induced Mutations in Drosophila Effects of Gamma Rays on Yeast and Aspergillus Radiation-Protective Effects of RNA Radiation, Hematology, and Biochemical Study of Molt-Control Hormones of Crayfish, and Possible Importance to Man Radiation and Mutations Aromatics Possibly Help Determine Plant Radiosensitivity Bone Marrow Transplantation and Recovery Mutation in Tomato Plants Produced by Gamma-Ray Radiation Dietary Control of Ionizing Radiation Effects of Cooling on Radiation Damage to Living Cells Rate of Regeneration of Eyespots in Planaria Effects of Radiation on Transmission of Nerve Impulses Irradiation of Amino Acids Radioisotopes Topics Use of Radioactive Salts in Plant and Animal Nutrition Studies The Radioactive Isotopes: Its Uses in Medical Research and Treatment Chemical Activity of Deuterium as Compared with Hydrogen Radioisotopes in Medicine Pinpointing the Past with Carbon-14 Algae Uptake of ³²P Radioiodine and Construction of a Geiger-Mueller Counter Radioiodine in Guppies Uses of Radioisotopes Radioisotopes Chelation of a Radioactive Isotope in Rats The Role for Radioactive Testosterone on Hematopoieses Phosphorus-32 Tracer Studies Conducted with the Coleus Plant Tracing the Organ Uptake of Radioisotopes in Animal Tissue Carbon-14 in Photosynthesis Transfer of Radioactive Elements on Succeeding Generations Corrosion and Adsorption Studies Using Radiochemical Techniques The Radioactive Elements—Separation, Detection, and Properties Experiments with Radioisotopes Translocation of Radioactive Phosphorus Assimilation of Radioactive Isotopes in Fish Use of ³²P by Plants Comparative Studies of Isotope Utilization in Tomato Plants Detection of Strontium-90 in Backbones of Fish from Areas of the United States The Circulation of Iodine (¹³¹I) in the Parabiotic Rat Radioactive Zinc and Zinc-Chelates in the Hormone Metabolism of Plant-Tissue Culture Effect of Dietary Calcium on Deposition of Calcium-45 and Strontium-90 Autoradiographical Evidences of Cytological-Radioisotope Deposition Tracing the Development of a Chick Embryo with ³²P Radioactive Isotopes as Tracers Beware! Strontium-90 Everywhere Plant Research with Radioactive Phosphorus The Kettleman Hills Formation (Carbon-14 Dating) Radiobiologic Investigations of Contractile Activity and ATP-induced Pinocytosis _in vitro_ Determination of the Half-life of ⁶⁵Zn Atomic Farming Nutrient Passage Through Plant Grafts as Tested with Radioisotopes Study of the Period of DNS Synthesis Using Tritiated Thymidine Absorption of Radioactive Iodine by Molds and Bacteria Radioisotopes as Tracers Translocation of ³²P in Plants Nuclear-Change Topics