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Lead, cadmium, zinc, manganese, chromium, cobalt, copper, and molybdenum concentrations were measured in 50 samples of placenta tissues. The samples came from Tychy in the Upper Silesian Industrial District (Poland), where the population is exposed to enormously increased levels of heavy metals. GFAAS technique was used. Various methods of ashing samples were examined. Wet ashing under pressure in...
Using atomic absorption spectroscopy, Cu, Zn, Fe, Mn, V, Pb, and Cd levels have been determined in kidneys and livers of cows and sheep from the Suwałki region. It has been found that there are differences in the arrangment of V, Cu and Fe in the examined tissues. Pb and Cd concentrations provide evidence that exposure of the examined animals to these metals is low in this region. They approximate...
The concentrations of lead, cadmium, zinc, cuprum and chrominum in human milk were determined using GF AAS. The samples originated from women living in the Upper Silesian Industrial District (Poland). The mean concentration of lead was about 50 ng/g, cadmium 16 ng/g, zinc 50 μg/g, chromium 45.5 ng/g, and copper 1.1 μg/g. The mineralization of the samples was carried out both by means of concentrated...
The effect of heavy metal ions (both biogenic Mn2+, Ni2+, Zn1+ and abiogenic Hg2+, Pb2+, Cd2+) on the growth of Bacillus licheniformis bacteria, and the kinetics of denitrification were studied. Rate constants and induction times of denitrification taking place in the media containing metal ions at different concentrations were determined. The order of toxicity of the metals and their maximum tolerable...
Fluorine was isolated from plant material by microdiffusion and determined potentiometrically using a fluoride ion-selective electrode. The content of lead, cadminum, copper, zinc and manganese was determined by the ASA method. Samples of cocksfoot and meadow grass were collected from plots in which mineral fertilizers (O, PK, PKN100, PKN150, PKN200, PKN250) had been used for seven years. The obtained...
Atmospheric cadmium emissions from the non-ferrous metals industry and energy production sector within the Upper Oder River Basin was estimated for the period of 1989 -1992. The zinc and lead industry reduced metal emission by about 75% in the examined period to 1.2 Mg/a, while the copper industry showed a slow growth of emissions from 0.34 in 1989 to 0.51 Mg/a in 1992. Hard coal-fired power plants...
This paper presents studies on the effects of manganese, barium, zinc, aluminium and copper ions on the rate of biological sulfates reduction by Desulfotomaculum ruminis bacteria. We determinated the concentrations of these ions which totally inhibited the process. The anions we studied can be arranged according to increasing poisonous properties: Mn2+
Concentrations of lead, cadmium, copper and zinc in Lowland and Merino wool fibres were determined using differential pulse voltammetry, and iron concentration was measured by means of the spectrophotometric method. A differentiation in the concentration of the above elements in the same staple was Pb: 13.5-29.31 [mg/kg]; Cd: 0.95-4.59 [mg/kg]; Zn: 57.21-91.34 [mg/kg]; Cu: 2.79-5.91 [mg/kg]; Fe: 58...
Concentrations of lead, cadmium, copper and zinc in soil near public main roads in the city of Poznań were determined using AAS by microsampling techniques. Mineralization of the soil samples was carried out in concentrated mineral nitric acids and hydrogen peroxide Ander normal pressure for 12 hours.
A procedure for determining the chemical forms of zinc, cadmium, lead and copper in surface and ground waters located in Agricultural Landscape Park (ALP) is outlined. Heavy metals were differentiated into ionic, labile forms and moreover on stable complexes and chelates. In the studied waters, concentrations of ionic forms were 17.9-45.2 μgZn/l, 0.003-0.038 μgCd/l, 0.28-6.29 μgPb/I. Labile complexes...
Fluorine exists in hard tissues (bones, teeth), in which it plays a structural function. Small quantities of fluorine are found in biological solvents and soft tissues. Fluoride ions are not enzyme cofactors but may influence their activity. In this paper, the acitivity of ICDH (isocitric dehydrogenase, E. C. 1.1.1.42) was tested in the presence of different concentrations of fluoride ions (from 0...
The spectrophotometric FIA method was used to determine L-ascorbic acid in rats exposed to cadmium (5 ppm, 50 ppm) and zinc (250 ppm). An attempt has been made to explain the nature of complexes which are formed in the system Me(II) - H2Asc - H2O and the interactions between these compounds in an organism.
The seeds of Albizia lebbeck, Leucaena leucocephala and Peltophorum pterocarpum show a high rate of germination in the soil extract of control (campus) as compared to polluted areas (city). Germination percentage was lowest in the soil extracts of Guruminder and M. A. Jinnah road. The seedling length of A. Lebbeck and P. pterocarpum was not significantly altered by the soil extract of city areas,...
Experimental evidence has indicated that dietary zinc level may modulate the accumulation and toxic response to lead, cadmium and mercury. Insufficient zinc intakes have been shown to increase the risk associated with the exposure of animals to these heavy metals. On the other hand, moderate zinc supplements have been found to have a marked effect in preventing the deleterious effect produced by lead,...
The aim of this study was to examine the influence of oral intoxication with cadmium and ethanol separately or together on zinc concentrations in liver and kidney of rats. Cadmium was administered at a concentration of 50 mg Cd/dm3 in drinking water for 8 weeks. Ethanol was given in a dose of 5 g/kg of body weight (as a 25% solution) every 12 h for the last 108 h of the experiment. The conducted study...
Eight soils were studied for adsorption reactions of zinc and evaluated for their quantity, intensity and supply parameters for zinc. With the addition of increasing amounts of zinc there was a simultaneous increase in the equilibrium concentration, adsorption, percent saturation of adsorption capacity and supply parameter of zinc. Multiple regression analysis revealed that in all soils quantity,...
The objective of this study was to assess the relationship between lead, cadmium, zinc, and copper contents in the children's head hair and the level of environmental exposure in the subject's place of residence. The studied population was a group of 93 children (62 boys and 31 girls), aged 5-16, living in contaminated regions of the Copper Basin Legnica ("Exposed Group"). The control ("Reference...
Liver and kidneys collected in 1998 from cattle bred in the region of Varmia and Mazuria were analysed for the levels of cadmium, as well as copper and zinc. The mean concentration of cadmium younger animals (<2 years) was 0.425 mg/kg in kidneys, and 0.159 mg/kg in liver, being much lower than the levels found in older (>2 years) cattle. Notwithstanding this, cadmium levels were not high enough...
The present paper studies the content of heavy metals: Fe, Mn, Zn, Cu, Pb, Ni and Cd in the foliage of an indicator plant - dandelion - as collected from the lawns and parks of the Warsaw metroplitan area. The results suggest heavy accumulation of Fe, Zn, Pb and Cd as a consequence of the impact of traffic-born pollution.
The heavy metals cadmium, nickel, lead, molybdenum and zinc were determined in 19 samples of moss taken from 19 points situated in the Gliwice and Sanok areas. Samples (segregated, cleaned and powdered) were digested by the wet method in the microwave mineralizer. Differential pulse anodic stripping voltam- metry (DPASV) was used for determination of Cd, Ni, Mo, Pb and Zn. Oriental tobacco (CTA-ATL-1)...
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