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    Wyświetlanie 1-9 z 9
    Tytuł:
    137Cs content in mushrooms from localities in eastern Slovakia
    Autorzy:
    Cipáková, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147289.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiocaesium
    mushrooms
    soil contamination
    sequential extraction
    Opis:
    The amount of radiocaesium in chosen species of mushrooms from localities in eastern Slovakia was studied. From the obtained results it was found that Macrolepiota procera and Armillariella mellea are defined by low ability to accumulate caesium. Higher values of 137Cs were measured in Russula aeruginea and Xerocomus subtomentosus and achieved 869.6 and 322.9 Bg kg 1 dry weight, respectively. Soaking and washing can be used to decrease radioactivity in mushrooms. Using water and solution of table salt in studied species of mushrooms decreased the amount of radiocaesium by 33 88%.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 25-29
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of time, temperature, pH and inhibitors on bioaccumulation of radiocaesium - 137Cs by lichen Hypogymnia physodes
    Autorzy:
    Pipíška, M.
    Horník, M.
    Kočiová, M.
    Augustín, J.
    Lesný, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147746.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiocaesium
    lichen
    Hypogymnia physodes
    bioaccumulation
    kinetics
    efflux
    Opis:
    Caesium bioaccumulation experiments were carried out at 4 to 60°C using natural samples of the lichen Hypogymnia physodes. Thalli were incubated in 2.5 mi mol.l 1 CsCl solutions labelled with 137CsCl for up to 24 h at pH values from 2 to 10. Bioaccumulation of Cs+ ions in the first phase of the lichen-CsCl solution interaction is rapid, neither pH, nor temperature dependent within the range 4 to 60°C and observed also with the lichen biomass thermally inactivated at 60°C or chemically by formaldehyde. The second phase of 137Cs bioaccumulation is time, temperature and pH dependent and is inhibited by formaldehyde and thermal inactivation. The process at the initial concentration C0 = 2.5 ěmol.l 1 CsCl and 20°C reached equilibrium within 12 hours. It can be described by the first order reaction kinetics equation: log [Ct] = 1.89 - 0.00153 t, R = 0.950. Maximal values of Cs-bioaccumulation were observed at 20°C with minimum at 4°C and 40°C and at pH 4 5 with minimum at pH 2 and pH 6. Low caesium efflux values from lichen thalli by water and 0.1 mol.l 1 neutral salts at 20°C and 24 h equilibrium were observed. Efflux characterized by distribution coefficients D = [Cs]solution/[Cs]biomass at biomass/solution ratio 1:25 (w/v, wet wt.), decreases in the order: Li+- 78 × 10 3 >NH4 + = K+ 15 × 10 3 > Cs+ = Na+ 11 × 10 3. Low extractability of caesium from lichen by water and salt solutions can explain long persistent times of radiocaesium contamination sorbed by lichens, observed by many authors in caesiumcontaminated forest and mountain regions. Hypothesis of the role of the lichen secondary metabolites as caesium binders is discussed.
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 39-44
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of Cs-137 deposition in soil and lakes in the north-east region of Poland
    Autorzy:
    Zalewski, M.
    Kapała, J.
    Mnich, Z.
    Zalewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147182.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Chernobyl accident
    environment contamination
    lake sediment
    radiocaesium
    Opis:
    The aim of this work is to assess the current deposits of Cs-137 in soil and in lakes in the Poland's north-eastern lake district (12-14 years after Chernobyl accident) a dozen or so years after the Chernobyl disaster. Caesium content in soil and sediment was determined by gamma spectrometry (in 79 soil samples and 136 sediment samples). The soil samples were collected in summer 1998-2000. The sediment from 29 lakes were sampled in May 2000. The highest surface activity was found in soil with the arithmetic mean (AM) 3.13 kBq m-2 and median (M) 2.37 kBq m-2. For lakes, the respective values were 1.89 kBq m-2 and 1.5 kBq m-2. In the case of the soil samples collected from forests, fields, lake shores and arable lands, the mean values of caesium deposition were: 4.37, 2.56, 3.42 and 1.52 kBq m-2, respectively. The mean surface activity of sedimentary samples (AM) from oligotrophic, mesotrophic and eutrophics lakes was found to have different values, viz. 1.48, 2.23 and 1.86 kBq m-2, respectively.
    Źródło:
    Nukleonika; 2002, 47, 2; 75-78
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dissolved and suspended forms of caesium-137 in marine and riverine environments of the southern Baltic ecosystem
    Autorzy:
    Knapińska-Skiba, D.
    Bojanowski, R.
    Piękoś, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/147163.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Baltic waters
    dissolved form
    fluvial waters
    radiocaesium
    suspended form
    Opis:
    Dissolved and particulate activities of caesium-137 are presented for the coastal and open southern Baltic Sea waters, fluvial waters (the Vistula and Swina rivers) and lagoon waters (the Vistula Lagoon) during 1996-1999 and compared to those collected before the Chernobyl accident. 137Cs was measured in the Baltic Sea waters at different depths as well as 0.2-0.3 m above the sea bed. In a layer of the Gdafsk Bay waters (the Gdafsk Deep location), extending from the surface down to 1-2 meters above the sea bed, the caesium-137 concentrations ranged between 57 and 66 Bq m-3 in 1999, whereas in the layer situated 0.2-0.3 m above the sea bed its concentration increased up to 87 Bq m-3. This phenomenon was also observed in 1994 and 1998. The concentrations of caesium-137 in riverine suspended particulate matter (r SPM) are lower than in the marine SMP (m SMP) and its activity attains respectively 36 and 222 Bq kg-1 based on dry weight. The proportion of caesium-137 in the suspended form in the Baltic Sea waters does not exceed 2 per cent, while in the fluvial suspended form it is as high as 55 per cent.
    Źródło:
    Nukleonika; 2002, 47, 2; 53-58
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of 137Cs low level exposure (internal and external) doses on plants
    Autorzy:
    Marčiulioniene, D.
    Kiponas, D.
    Lukšiene, B.
    Gaina, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/148666.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radioecology
    garden cress
    Lepidium sativum L. cells
    roots
    seeds
    morphometric analysis
    radiocaesium
    Opis:
    Effects are described of internal exposure doses of ionizing radiation in above- and underground parts of test plants under natural conditions and in roots of Lepidium sativum L. from accumulated 137Cs under laboratory conditions. In the region most contaminated after the Chernobyl accident, in the tested 10 plant species for 137Cs ionizing radiation the internal exposure doses 3.5 times exceeded those in the Ignalina Nuclear Power Plant environment. Under laboratory conditions the effect of low internal (0.6-600 mSv) and external (40-5500 mSv) exposure doses from 137Cs on garden cress, Lepidium sativum L. roots was, practically, the same. Both internal and external exposure doses stimulated the plant root growth by 12 and 33%, respectively. Different effect of external and internal exposure on the developing plant cells was observed by analyzing the results of morphometric investigations of the primary root cap cells of Lepidium sativum L.
    Źródło:
    Nukleonika; 2005, 50, 4; 161-166
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    137Cs activity distribution in the Lithuanian coastal waters of the Baltic Sea
    Autorzy:
    Davuliene, L.
    Tarasiuk, N.
    Spirkauskaite, N.
    Trinkunas, G.
    Valkunas, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/48708.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrodynamic model
    coastal water
    activity
    Curonian Lagoon
    concentration
    Baltic Sea
    Lithuania
    radiocaesium
    distribution
    Opis:
    The main 137Cs accumulation zone in the study area was found to be located at depths below the 50-metre isobath, i.e. below the layer of hydrodynamic activity. In coastal waters not influenced by the fresh water discharge from the Curonian Lagoon, 137Cs occurs mostly in soluble form. The particulate 137Cs activity concentration in the marine area affected by Curonian Lagoon water can make up 10% of the total 137Cs activity concentration. The circulation model was developed to assess the distribution of artificial radionuclides in Lithuanian territorial waters. The model was validated on the basis of data acquired during the measurement campaign in the Lithuanian part of the Baltic Sea and the Curonian Lagoon in the years 1999–2001. The model enables the 137Cs activity concentration to be simulated as a passive admixture (error within c. 15%).
    Źródło:
    Oceanologia; 2007, 49, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radioactive food contamination in Warsaw in the fifth year after the Chernobyl accident
    Autorzy:
    Mazur, G.
    Jednorog, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371700.pdf
    Data publikacji:
    1993
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    radioactive food
    environment
    radiopotassium
    food
    Chernobyl disaster
    monitoring
    radiocontamination
    radiocaesium
    radiological protection
    Warsaw city
    food contamination
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 1993, 02, 2; 87-91
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartosc radiocezu w wybranych produktach spozywczych.I.Zawartosc radiocezu w mleku w proszku[1987-1988]
    Radioactive caesium content in selected food products.Part I.Radioactive caesium content in dried milk[1987-1988]
    Autorzy:
    Skibniewska, K A
    Smoczynski, S.S.
    Werner, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/875029.pdf
    Data publikacji:
    1993
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    analiza zywnosci
    zdrowie czlowieka
    zywnosc
    radiocez
    mleko w proszku
    mleko
    dieta
    pierwiastki promieniotworcze
    skazenie zywnosci
    zywienie czlowieka
    produkty spozywcze
    food analysis
    human health
    food
    radiocaesium
    milk powder
    milk
    diet
    radioactive element
    food contamination
    human nutrition
    food product
    Opis:
    W pełnym i odtłuszczonym mleku w proszku wyprodukowanym w okresie jesiennym 1987 i zimowym 1988 w wybranych zakładach mleczarskich z terenu całego kraju oznaczano zawartość radiocezu; stwierdzono poziom zróżnicowany i wyższy w porównaniu do danych sprzed 1986 roku.
    The content of radioactive ceasium in dried and dried skimmed milk from selected daires was double determined. The highest content was found in samples from milk from OSM Siedlce (98 Bq/kg) and skimmed milk from Radzyń Podlaski and Ostrołęka, (the former 90, the latter 62 Bq/kg). The lowest level of radioactive caesium was obserwed in samples from dried milk from Sieradz, Słupsk, Września, Olecko and Elbląg (about or below 10 Bq/kg). Although those levels of contamination with radioceasium didn't exceed values recommended by FAO they were determined as high for year 1987/88 as compared milk datas from previous 1985 year.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1993, 44, 2-3; 165-170
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartosc radiocezu w wybranych produktach spozywczych
    Autorzy:
    Skibniewska, K
    Smoczynski, S.S.
    Wisniewska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/874269.pdf
    Data publikacji:
    1993
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    awarie jadrowe
    miasta
    zywnosc
    radiocez
    Czarnobyl
    pierwiastki promieniotworcze
    calodzienne racje pokarmowe
    zagrozenia srodowiska
    skazenie zywnosci
    zywienie czlowieka
    produkty spozywcze
    nuclear accident
    city
    food
    radiocaesium
    Chernobyl town
    radioactive element
    daily food ration
    environment hazard
    food contamination
    human nutrition
    food product
    Opis:
    Oznaczono zawartość radiocezu w całodziennych racjach pokarmowych zestawionych dla rodzin robotniczych i nierobotniczych. Racje przygotowywano z produktów pozyskanych w rejonie Olsztyna, Poznania, Lublina, Warszawy i Wrocławia w 1987 i 1988 roku.
    The content of radioactive caesium isotopes emitting beta radiation was studied in daily food rations analysed in diets of working-class and non-working-class families from food products from the regions of Olsztyn, Poznań, Lublin, Warsaw and Wrocław in 1987 and 1988. In 1987 the highest level of radioactive caesium was found in the food rations in Olsztyn, and the lowest in the rations in Poznań (3.32 and 0.65 Bq/kg respectively). In 1988 higher radiocaesium content was found in rations composed according to the data on the diet consumed daily in non-working-class families. In that case the highest content was in the daily food ration composed in Warsaw - 2.35 Bq/kg, and lowest in Poznań - 1.19 Bq/kg. In the daily food rations of working-class families about one half of that value was found. The calculated mean values of both analysed rations were: 1.35 for Olsztyn, 0.89 for Poznań, and 1.86 Bq/kg for Warsaw. The calculated mean value of the contamination with radioactive caesium was in 1988 0.93 Bq/kg for the rations in working-class families (in 1987 it was 1.80 Bq/kg).
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1993, 44, 4; 367-371
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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