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M. Popijač, I. Seletković, M. Volner. I. Lovrenčić. D. Barišić, N. Kezić: DINAMIKA KRETANJA Šumarski list br. 5-6, CXXVII1 (2004). 269-277 dent and Effective Dose Received by the Population of Croatia. J Environ Radioact41, 137-146. L i v e n s , F. R., A. D. H o r r i l l and D. L. S i n g l e t o n , 1991: Distribution of radioccsium in the soil-plant system of upland areas of Europe. Hlth. Phys., 60: 4, 538-545. M a r o v i ć , G., 1990: Procjena nuklearnog akcidenta pomoću bioindikatora. Disertacija. Tehnološki fakultet Sveučilišta u Zagrebu. Zagreb. M e d v e d o v i ć , J . , 2001: Klima i hidrološke prilike u jelovim šumama panonske Hrvatske, Obična jela u Hrvatskoj (monografija), 147-161, Zagreb. Per nar, N. 2001: Tla jelovih šuma u Hrvatskoj, Obična jela u Hrvatskoj (morfologija), 107-132, Zagreb. P e t r o v i ć , B., G. Đ u r i ć , 1981: Elementi radioekologije u stočnoj proizvodnji. (Nastavna materija za predmet Zaštita životne sredine za studente poslijediplomskih studija na veterinarskom fakultetu). S. n. Beograd R e l m a n , A. S., 1956: The Physiological behavior of rubidium and cesium in relatio to that of potassium. Yale J Biol Med 28, 248-262. Cit. prema: B. Ahman, 1994. R o s e n , K.., I. O b o r n , H. L o n s j o , 1999: Migration of radiocaesium in Swedish soil profiles after the Chernobyl accident 1987-1995. J Environ Radioact 46, 45-66. S e l e k o v i ć , I. N. P o t o č i ć , 2004: Oštećenost šuma u Hrvatskoj u razdoblju od 1999. do 2003. godine, Šumarski list 630, (3-4): 137-148, Zagreb. S h a n d , C . A., M.V. C h e s h i r e , S. S m i t h , M. Vid a l , G. R a u r e t , 1994: Distribution of radioccsium in organic soil. J Environ Radioact 23, 285-302. Shaw, G., J. N. B. B e l l , 1989: The kinetics of ceasium absorption by roots of winter wheat and the possible consequences for the derivation of soil - to - plant transfer factor. J Environ Radioact 10,213-231. T r i n a j s t i ć , I., 2001: Rasprostranjenost, morfologija i taksonomija jele u Hrvatskoj, Obična jela u Hrvatskoj (monografija), 93-106, Zagreb. V u k e l i ć , J., D. B a r i č e v i ć , 2001: Šumske zajednice obične jele u Hrvatskoj, Obična jela u Hrvatskoj (monografija), 162-196, Zagreb. Wegener, K. H., 1966: Radioaktivitat und Veterinarmedizin. Paul Parcy in Berlin und Hamburg. Berlin. United Nations Scientific Committee Effects of Atomic Radiation, 1993: Source and effects of ionizing radiation. United Nations Scientific Committee on the Effects of Atomic Radiation. UNSCEAR 1993 report to the general assebbly, with scientific annexes, United Nations, New York. United Nations Scientific Committee Effects of Atomic Radiation, 2000; Sources and effects of ionizing radiation. United Nations Scientific Committee on the Effects of Atomic Radiation. UNSCEAR 2000 report to the general assembly, with scientific annexes, United Nations, New York. World Health Organization, 1987: Helth Hazards from radiocesium following the Chernobyl nuclear accident. Report on a WHO meeting. Schloss Reisesburg Griinzburg, Federal Republic of Germany 9-12 June 1987. WHO Copenhagen. SUMMARY: Cesium 137, or l37Cs, appeared in the atmosphere after thermonuclear tests were conducted intensively during the 1950´s and 1960´s, and the last large quantity of!37Cs was released after the major explosion at Chernobyl, when varying amounts of cesium deposits on the earth´s surface were observed. Irradiation was relatively brief while levels of radioactivity were not equal, because they were linked to the amount of precipitation that appeared uncontrollably as a result of the explosion. Cesium very quickly entered the soil, but it only migrated to deeper layers very slowly due to the effects of surface waters (Filipović et al, 1991). The speed of cesium migration was slowed by radiation absorption processes. A relatively large quantity of clay and micro-minerals resulted in the fast and irreversible bonding of cesium with the soil (Cremers et al, 1988). Plant species are good indicators of cesium, even though their physiological characteristics may vary. This primarily depends on the free cesium in the root system that the plants have taken in from the soil and the extent of its penetration into the plant. Today it is important to stress that the physiological 276 |