: GLANDS; HAZARDS; INTAKE; ISLANDS; MATERIALS; MICRONESIA; OCEANIA; ORGANS; TOXIC MATERIALS; VERTEBRATES Subject Categories: (-1989) 552000 550200 10/5/798 00767695 520100* -- Environment, Aquatic -- Basic Studies -- -- Public Health -- Biochemistry {Item 498 from file: 103) INS-81-010696; EDB-81-075956 Title: Origin of particulate organic carbon in the marine atmosphere as indicated by it stable carbon isotopic composition Author(s): Chesselet, Lambert, C.E. Affiliation: 91190 R.; Fontugne, M.; Buat-Menard, Centre des Faibles Radioactivites, Gif-sur-Yvette, France Source: Geophys. Res. Lett. (United States) Publication Date: Apr 1981 p 345-348 Document Type: Journal Article Language: English Journal Announcement: Subfile: INS EDB8106 (US Atomindex input); AIP P.; Ezat, U.; Laboratoire mixte CNRS-CEA, v 8:4. Coden: GPRLA (SPIN). Country of Origin: France Abstract: Organic carbon céncentration and isotopic composition were determined in samples of atmospheric particulate matter collected in 1979 at remote marine locations (Enewetak atoll, Sargasso Sea) during the SEAREX (Sea-Air Exchange) program field experiments. Atmospheric Particulate Organic Carbon (POC) concentrations were found to be in the range of 0.3 to 1.2 mg. m/sup -3/, in agreement with previous literature data. The major mass of POC was found on the smallest particles (r<0.5 mm). The /sup 13/C//sup 12/C of the small particles is close to the one expected (d/sup 13/C = 26 +- 2/sup 0///sub infinity/) for atmospheric POC of continental origin. For all the samples analysed so far, it appears that more than 80% of atmospheric POC over remote marine areas is of continental origin. This can be explained either by long-range transport of small sized continental organic aserosols or by the production of POC in the marine atmosphere from a vapor phase organic carbon pool of continental origin. The POC in the large size fraction of marine aerosols (<20% of the total concentration) is likely to have a direct marine origin since its carbon isotopic composition is close to the expected value (d/sup 13/C = -21 +- 2/sup 0///sub 00/) for POC associated with sea-salt droplets transported to the marine atmosphere. ; Major Descriptors: *CARBON -- ISOTOPE RATIO; *CARBON -- QUANTITY RATIO; *EARTH ATMOSPHERE -- ISOTOPE RATIO Descriptors: ENIWETOK; ORGANIC COMPOUNDS; SARGASSO SEA Broader Terms: ATLANTIC OCEAN; ELEMENTS; ISLANDS; MARSHALL ISLANDS; MICRONESIA; NONMETALS; OCEANIA; SEAS; SURFACE WATERS Subject Categories: 500200* -- Environment, Atmospheric -- Chemicals Monitoring & Transport -- (-19839) INIS Subject Categories: C52* -- Radiation Hazards & Safety Evaluations of Nuclear Installations 10/5/799 00761550 Author(s): (Item 499 from file: 103) ERA-06-021022; INS-81-009524; Noshkin, V.E.; Eagle, R.J.; EDB-81-069810 Wong, K.M.; Jokela, T.A.; . groundwater at the Marshall Islands Corporate Source: Publication Date: Lawrence Livermore National Lab., 16 Mar 1981 p 37 Report Number(s): UCRL-52853 (Pt.2) Contract Number (DOE): W-7405-ENG-48 Document Type: Report Language: English Journal Announcement: EDB8106 CA (USA) 9003963 Robison, W.L. Title: Radionuclide concentrations and dose assessment of cistern water and