EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Behaviour of 137Cs from Chernobyl fallout in a Scots pine canopy in southern Finland


, : Behaviour of 137Cs from Chernobyl fallout in a Scots pine canopy in southern Finland. Canadian Journal of Forest Research 24(6): 1210-1215

The behaviour of 137Cs from the Chernobyl nuclear power plant accident in the Ukraine on 26 April 1986 was monitored during a 3-year period in the canopy of a young Scots pine (Pinus sylvestris L.) stand in southern Finland. Needle samples were collected from the same whorls on 13 sample trees marked at the beginning of the study. The 137Cs activity of throughfall water was determined in summer 1986. The oldest needles at the time of the radioactive deposition (formed in 1983) had the highest 137Cs activity (20 000 Bq/kg) in June 1986, when the monitoring was started, 58 days after deposition. About 50% lower s activity was observed in the needles formed in 1984 and 1985, and an even lower activity of 3050 Bq/kg in the needles formed in 1986 following the incident. During the summer of 1986, the 137Cs activity of the whole canopy decreased from 106 000 to 42 500 kBq/ha, corresponding to a weathering half-life of 72 days. Washout by throughfall accounted for 79% of the decrease, while the rest was mainly due to the gradual shedding of the highly contaminated 1983 needles. The needles formed in the summers of 1987 and 1988 had rather high 137Cs activities of 2700 and 4800 Bq/kg, respectively. The reduction in the 137Cs activity of the canopy was considerably less in 1987 and 1988, with weathering half-lives of 435 and 242 days, respectively. The total 137Cs activity of the canopy was still 13 500 kBq/ha on 20 October 1988, which was 896 days after deposition. An increase in the 137Cs activity was observed in the autumns 1987 and 1988, and to a lesser degree in the autumn of 1986, a time of year when needle potassium concentrations normally tend to increase. It was concluded that the Chernobyl 137Cs had become mixed with the chemically analogous K, and was recirculated within the trees together with K.

(PDF 0-2 workdays service)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 002308899

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Friedrich, B.; Heine, E.; Finck, A.; Friedrich, C.G., 1981: Nickel requirement for active hydrogenase formation in Alcaligenes eutrophus. The nickel-dependent chemolithoautotrophic growth of Alcaligenes eutrophus is apparently due to a requirement of nickel for active hydrogenase formation. Cells grown heterotrophically with fructose and glycerol revealed a specific activity of solu...

Herve, D.; Molko, N.; Pappata, S.; Jobert, A.; Lebihan, D.; Bousser, M.G.rmaine; Chabriat, H., 2002: Secondary thalamic microstructural changes after middle cerebral artery infarction In vivo study with diffusion tensor imaging. Neurology 58(7 Supplement 3): A147, April 9

Heilig, S.; Wilson, T.S., 1999: The need for more physicians trained in abortion: raising future physicians' awareness. Cambridge Quarterly of Healthcare Ethics 8(4): 485-488

Rexroth, G.; Keller, C., 1995: Chronic course of eosinophilic pneumonia in infection with ascaris lumbricoides. A case of ascariasis-associated Loeffler's pneumonia is reported, which presented like Carrington's chronic eosinophilic pneumonia (CEP). It is assumed, that under unfavourable conditions (children, old or disabled patients with high wor...

Thomas, T.G.; Wilson, E., 1973: The character of Erasmus Wilson. Transactions of the Medical Society of London 89: 288-291

Fariello, R.; Curtoni, E.S.; Delsedime, M.; Mutani, R.; Quattrocolo, G.; Fariello, R.; Furlan, P.M., 1971: Genetic considerations on a series of cases of peripheral neuropathy of the hereditary paramyloidosis type. Archivio Per le Scienze Mediche 128(4): 181-185

Brown, H. R.; Thormar, H., 1976: A nonproductive subacute sclerosing panencephalitis virus of human and ferret an ultrastructural study. A non-productive syncytiogenic measles virus isolated from the brain of an SSPE patient was grown on [green monkey kidney] Vero cells. The ultrastructure of the infected syncytia was studied by EM and immunoperoxidase techniques, and compared with...

Sepulchre, P.; Blaimont, P.; Pasteels, J.L., 1988: Medial tibial pain in runners. Pain at the site of the tibial insertion of the flexor digitorum longus and the soleus near the middle third of the medial border of the tibia may be encountered in young athletes, who have usually started to run in late adolescence. Heel valgus,...

Griffith, W.H.; Wade, N.J., 1939: Some effects of low choline diets. The production of fatty livers in young rats on low choline diets is only one manifestation of a severe pathological state characterized by an extensive glomerular and tubular hemor-rhagic degeneration of the kidneys. These effects are not depende...

Rangel, A. F.; Reddy, B. V. S., 2000: Network trials: prospects and problems. A research and network strategy for sustainable sorghum and pearl millet production systems for Latin America Proceedings of the Workshop, Villavicencio, Meta, Colombia, 24-26 November 1998: 57-65