dexnumber Order number 940406-272627-15 _ QEERIAT USE ONLY 940406-171827-13 1 data appear in Chapter 3. The principal results are contained in Chapter 4, including (1) comparison of Explorer 4 and Injun 1 data, (2) lifetimes 'for artificial belts, and (3) diffusion for ARGUS. 28 801. KEYWORD (S) references. ORANGE BURST/radiation belts belts ;TEAK BURST/radiation ;RADIATION BELTS/;DATA PROCESSING; EXPLORER Item 68 150. 110. REPORT NUMBER PRIMARY TITLE (M) 70. 710. PERSONAL AUTHOR (M) CORPORATE SOURCE WT--954 Radioactivity of open-sea plankton samples. Project 2.7a [of] Operation Castle (USA) Folsom, T.R.; Jennings, F.D.; Johnson, M.W. Scripps Institution of Oceanography, La Jolla, CA 580418 371. PUB. DATE (YYMMDD) 34. CLASSIF. LEVEL TEXT Official Use Only The general relationship pertinent to the uptake 950. ABSTRACT of fission products by marine organisms is reported in order to form a background for more extensive tests on Wigwam. Gross beta activities, beta absorption curves and gamma spectra were analyzed, after identification of the organisms. A radiochemical analysis revealed: (1) that marine organisms concentrate activity from fallout fission products in the water by factors of the order of 1000, (2) that the partition of fallout fission products in the ocean is profoundly influenced by biological processes and that a purely physical model is inadequate to predict distribution, (3) that the feeding mechanism of the organism does not clearly determine the amount of activity assimilated, (4) that there is evidence of fractionation of isotopes by different organisms, and (5) 801. KEYWORD(S) that there is some evidence that finely dispersed activity is retained more or less proportionally with the dry weight of the organism. FISSION PRODUCTS/uptake ; MICROORGANISMS/radiochemical analysis ; MICROORGANISMS/radionuclide kinetics ; WIGWAM/fission products ;CASTLE/fission products ;PLANKTON/radionuclide kinetics ; UPTAKE;MICROORGANISMS; CASTLE; SEAWATER; BETA PARTICLES; GAMMA RADIATION; RADIOACTIVITY; PLANKTON i) Item 69 150. REPORT NUMBER 110. PRIMARY TITLE (M) 70. 710. DASA--532B on PERSONAL AUTHOR (M) CORPORATE SOURCE S003K12 High altitude sampling problem, Stebbins, A.K. III (ed.) Defense Atomic Support Agency, OFFICIAL USE ONLY a special report Washington, DC