discussed. (auth) Descriptors: CONTAMINATION; DROSOPHILA; FALLOUT; GENETICS; NUCLEAR EXPLOSIONS; RADIATION INJURIES; RADIOBIOLOGY; Subject Codes (NSA): BIOLOGY AND MEDICINE INSECTS; RECOVERY 10/5/235 (Item 235 from file: 109) 083081 NSA-12-007642 THE COMPOSITIONS, PARTICLES STRUCTURES, t , AND ORIGINS OF RADIOACTIVE FALLOUT Adams, C.E.; Farlow, N.H.; Schell, W.R. Naval Radiological Defense Lab., San Francisco Publication Date: Feb. 3, 1958 Al p. Primary Report No.: USNRDL-TR-209 Journal Announcement: NSA12 Document Type: : ! Report Language: English The chemical compositions, structures and modes of origin of severai different types of radioactive fallout particles have been determined through petrographic techniques, x-ray-diffraction analysis, radioautography, and specially prepared reagent films for liquid fallout. The fallout particles studied were collected following the detonation of nuclear weapons under various conditions at both the Nevada Test Site and the Eniwetok Proving Grounds. Radioactive fallout particles were formed by the interaction of the condensing vaporized metals and fission products derived from the homb and associated structures with the surface material swept up into the cooling fireball. Description of the various types of fallout particles are given and their modes of origin are qualitatively related by a simplified htermodynamic treatment. (auth) Descriptors: ATMOSPHERE; COOLING; DIFFRACTION; ELEMENTS; EVAPORATION; FALLOUT; FILMS; FISSION PRODUCTS; LIQUIDS; METALS; NEVADA TEST SITE; NUCLEAR EXPLOSIONS; PARTICLES; PRODUCTION; QUANTITY RATIO; RADIOACTIVITY; RADIOAUTOGRAPHY; THERMODYNAMICS; X RADIATION Subject Codes (NSA): GENERAL 10/5/236 (Item 236 from file: 081315 NSA-12-005871 109) BIOLOGICAL CYCLES OF FISSION PRODUCTS IN AQUATIC SYSTEMS AS THE PACIFIC ATOLLS OF BIKINI AND ENIWETOK Donaldson, Washington. L.R. Univ., STUDIED AT Seattle Publication Date: 1954? 8 p Primary Report No.: AECU-3412 Journal Announcement: NSA12 Availability: NTIS Document Type: Report Language: English The ecology of the Pacific Atolls of Bikini and Eniwetok is described. Results are summarized from studies on the distribution of fissien products in the biota. The contributions of these studies to a better understanding of life zones of coral atolls, the economy of the sea, and fundamental concepts of biological sciences are discussed. (C.H.) Descriptors: PRODUCTS; SEA Subject Codes 10/5/237 BIOLOGY; (NSA): DISTRIBUTION; ECONOMICS; ENVIRONMENT; BIOLOGY AND MEDICINE (Item 237 from file: 109) 081293 NSA-12-005849 LAND CRABS AND RADIOACTIVE FALLOUT AT ENIWETOK ATOLL Held, E.E. Washington. Univ., Seattle. Applied Fisheries Lab. Publication Date: May 27, 1957 39 p. Primary Report No.: UWFL-50 Journal Announcement: NSA12 Availability: NTIS 2 Document Type: Language: Report English 3 0 0 ; b 3 o FISSION