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  • Author or Editor: M. Harangozó x
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Abstract  

Penetration of Cs+ , Cd 2+ and Co2+ions across an animal model of human skin (five-day-old rat skin) was studiedin vitro in vertical diffusion cells. Glucans (fibrilary beta-glucan, carboxymethyl-chitosan-glucan)were used as permeation inhibitors with the aim to reduce the potential toxicologicaleffect of these metals in humans. Of the glucans studied, carboxymethyl-chitosan-glucanwas the more effective inhibitor. The dose-dependency of this effect was demonstrated.

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Abstract  

Radionuclide X-ray fluorescence analysis was used for the determination of Cr, Fe, Cu, Zn and Pb in industrial wastewaters (from surface treatment of metals and glasses) after precipitation of determined elements by 8-hydroxyquinoline.

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Abstract  

Radiometric X-ray fluorescence analysis was used for the determination of Mn, Fe, Cu, Zn and Pb in wastewater and sludges from three wastewater treatment plants in Bratislava (SR). Metals were determined in wastewaters after preconcentration by 8-hydroxyquinoline and in sludges by drying and pressing to pellets.238Pu and109Cd was used for excitation of fluorescence radiation.

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Abstract  

Radionuclide X-ray fluorescence method with a Si/Li semiconductor detector and238Pu exciting source was used in the determination of Cr, Fe, Ni, Cu, and Zn content in industrial wastewaters. Simultaneously, the effects of the wastewaters on activated sludge biocenose were evaluated.

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Abstract  

Radionuclide X-ray fluorescence method was used in the determination of Cr, Ni and other heavy metals content in wastewater of an engineering plant taken both before and after chemical treatment. Toxic effects of the wastewaters usingAllium cepa root tip cells were tested.

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Abstract  

Fe and Zn were determined in various parts of maize (Zea mays) in dependence on quantity of organic substrate EKOFERT as organic fertilizer in soil, using radionuclide X-ray fluorescence analysis. The increase of quantity of organic substrate EKOFERT in soil causes a decrease of heavy metal concentrations in certain parts of the plant.

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Abstract  

A new idea of flow-injection analysis is described.

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Abstract  

Co2+ ion penetration at different concentrations across animal models of human skin-five days old rat skin (without hairs) and nine days old rat skin (with hairs)—was studied in vitro in vertical diffusion cells. The results showed that the permeated amounts of Co2+ ions are proportional to its concentration in donor solutions, whereby permeated fractions are higher at lower concentrations. Results confirmed that the most important barrier against the penetration of ions is horny layer of the skin.

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Abstract  

Permeation of metal Cs+ ions from water solutions across the intact, stripped and splitted skin of 5- or 9-day old rat was studiedin vitro using vertical diffusion cells. The results showed that the stratum corneum (horny layer) of this new animal skin model represents the principal pentration barrier. The relative importance of the percutaneous absorption of Cs+ ions through transepidermal and transfolicular routes has been assessed comparing the penetration across skin without hairs and skin just haired. The results have shown that the shunt diffusion along hair follicles can be of preponderant value.

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Abstract  

Heavy metals (Pb, Cd, Mn, Cu, Zn, Fe) were determined in surface waters in the surroundings of the depositories of the mining shrubs in the region of Banská tiavnica (SR) by radionuclide X-ray fluorescence analysis. Allowed concentrations of the determined metals are exceeded numerously (multiplicity in some cases was 103–106).

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