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Wyszukujesz frazę "radionuclides" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Influence of Chemical Amelioration of Solonetzic Soils on the Presence of Heavy Metals and Radionuclides in Soil Profile
Autorzy:
Anatolievna, Guzeeva Svetlana
Powiązania:
https://bibliotekanauki.pl/articles/124832.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
phosphogypsum
amelioration
consequence
heavy metals
radionuclides
Opis:
The article considers the results pertaining to the influence of solonetzic soils chemical amelioration on the presence and redistribution of heavy metals and radionuclides in meter profile of soils. Meliorative procedures were carried out 45 years ago. Phosphogypsum has been used as chemical ameliorant up to 90-s on the solonetzic soils of Tyumen region. It is a by-product of phosphates production. The objective aimed at revealing possible negative consequences connected with the introduction of the chemical elements associated with phosphogypsum. The studies showed that phosphogypsum introduction contributes to some increase in the content of active forms of heavy metals (zinc Zn, copper Cu, cadmium Cd and lead Pb) in soil. However, critical values are achieved only by active lead Pb. The evaluation of radioactive state of meadow crusted solonetzic soils after carrying out of meliorative procedures (for the same period) on the content of isotopes of thorium-232 (Th-232), calium-40 (K-40), radium-226 (Ra-226), caesium-137 (Cs-137) and strontium-90 (Sr-90) indicated that redistribution of radionuclides after chemical melioration does not cause a negative change of radiation background. Vibrations in the soil profile are connected with various initial concentration in rock formations or weathering detritus. Specific effective activity (Аeff ≤ 370 Bq/kg) testifies to the soils being studied and absence of their additional introduction with introduced doses of phosphogypsum.
Źródło:
Journal of Ecological Engineering; 2019, 20, 5; 179-183
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of probiotics in the xenobiotic detoxification therapy
Autorzy:
Urban, P.
Kuthan, R.
Powiązania:
https://bibliotekanauki.pl/articles/147297.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
probiotics
detoxifiction therapy
radionuclides
heavy metals
mycotoxins
Opis:
Many applications of probiotics have been described to date. In this paper, it is hypothesized that probiotic microorganisms can also be used to decrease the xenobiotics intake in humans. The use of probiotic bacteriae (e.g. strains of Lactobacillus sp. and Bifidobacterium sp.) and yeasts (Saccharomyces sp.) gives the opportunity for detoxification of various elements and compounds, considered as contaminants, directly in the lumen of human intestine. Some of these microorganisms are known to accumulate cesium, strontium and heavy metals to a great extent and also bind mycotoxins. Certainly, during the up-coming years, their native or genetically modified strains will be a part of treatment protocols in detoxification therapy. The utilization of probiotics, in the both therapy and nutrition of people living in the countries suffering from high food contamination, could result in the reduction of annual xenobiotic dose to be incorporated in their organisms.
Źródło:
Nukleonika; 2004, 49,suppl.1; 43-45
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological analysis of heavy metal and radioactivity potential of Holocene sediments in Iznik Lake
Autorzy:
Yumun, Zeki U.
Kam, Erol
Powiązania:
https://bibliotekanauki.pl/articles/146352.pdf
Data publikacji:
2019
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Iznik Lake
heavy metals
radionuclides
geochemical analyses
radionuclide determination
Opis:
In this study, the heavy metal and radioactive properties of Iznik Lake were investigated. Concentration values of the first (Ag, Bi, Mo, Sn, Se, Zn, As, B, Cd, Co, Cr, Cu, Ni, Pb, Pt and Sb) and second (Na, Mg, K, Ca, P, S, Fe, Al and Mn) group of elements in borehole 1 (BH-1) drilling did not show much variation from the top to the bottom of the drilling. Concentration values of the fi rst group of elements in borehole 2 (BH-2) drill samples decreased at higher levels of drilling. In addition, natural and anthropogenic radionuclides were measured by gamma spectrometry, and the results of environmental natural radioactivity of Iznik Lake and its surroundings were determined. In the measurement results, Ra-226 was found to be below the world average value at all locations. It is assumed that the determination of K-40 values above the average values was due to agricultural activities carried out intensively in the study area. Th-232 values were found to be below the world average value in drilling samples; Cs-137 values were below the background level in all samples. According to these results, the study area does not contain any unnatural radioactivity.
Źródło:
Nukleonika; 2019, 64, 3; 103-109
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple and quick model to study uptake and transfer of radionuclides and heavy metals from mycelium to the fruitbody of saprophytic edible fungi
Autorzy:
Manjón, J.
Urban, P.
Bystrzejewska-Piotrowska, G.
Powiązania:
https://bibliotekanauki.pl/articles/147291.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bioaccumulation
radionuclides
heavy metals
mushrooms
mycoextraction
Pleurotus eryngii
saprophytic fungi
Opis:
A simple model of Pleurotus eryngii mushroom culture, grown under stringent laboratory conditions, was developed to watch ecophysiological pathways of xenobiotics in saprophytic fungi. The investigated substances may be added in different stages of biological cycle of the fungus. It is emphasized that to obtain the fruitbodies, all the physiological needs of the species have to be fulfilled, i.e.: nutritional requirements, optimal temperature (according to the biological cycle), humidity, aeration (oxygen and CO2), absence or presence of the light in each reproduction phase, as well as the control of infections and plagues through all the production stages. The described model serves for investigation of radionuclide and heavy metal uptake and transfer in fungi. Double or some multiple fructification from the same substrate is possible giving a possibility to investigate bioremediation by mycoextraction.
Źródło:
Nukleonika; 2004, 49,suppl.1; 21-24
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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