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Results of studies on a number of colony-forming units of heterotrophic bacteria, their physiological properties and nutritional requirements in water of Lake Jamno estuary are presented. The density of bacteria showed marked seasonal fluctuation with peaking in summer. Most numerous groups among bacteria studied were ammonifying, proteolytic and lipolytic strains. The smallest groups of them consisted...
In this paper physical, chemical and toxical properties of the polycyclic aromatic hydrocarbons (PAHs) have been described. Different methods for isolation of these compounds from air, water and soil were presented. Various chromatographic methods such as gas chromatography (GC and CGC/MS), high performance liquid chromatography (HPLC) with UV-Vis, diode array and fluorescence detection, thin-layer...
The number of bacteria participating in transforming carbon, nitrogen, sulphur and phosphate compounds and the number of actinomycetes, filamentous fungi and yeasts in soil fertilized with pig slurry was studied. The following types of soil were considered: — the arable layer of acid brown and black soil — the turf layer of mineral — marsh soil The following three areas were separated for estimating...
The organophosphorus insecticide bromfenvinios and its methylated homologue methylbrom- fenvinfos inhibited the activity of pig kidney (Na++K+)-ATPase contained in the microsomal fraction and purified from it. The effect was dose-dependent Subrate kinetic studies of the enzyme revealed the existence of two active sites with high and low affinity to ATP respectively. The Dixon analysis of the mode...
Ethanol (EtOH) abouse in pregnancy is known to produce serious damage of internal organs of the fetus, a condition in humans that is classified as "fetal alcohol syndrome". Cadmium (Cd), a heavy metal pollutant of the environment, represents another toxin that produces retarded fetal growth and teratogenic effects. The developing brain is particularly sensitive to both toxins, being affected...
Using an isotope labelling technique it has been shown that an organophosphorus insecticide methylparathion (0,0-diethyl 0-4-nitrophenyl phosphorothioate) depressed calcium uptake by sarcoplasmic reticulum isolated from rabbit hind leg muscle. The effect was significant for insecticide concentrations of 50 and 100 µM and was dose-dependent The insecticide exerted a more pronounced effect on calcium...
Studies of the contents of gamma emitters in samples of water and deposit taken from the Bug River (in Poland only) are presented. The total y-activity of deposits ranges from 120-650 Bq/kg and the average value is 350 Bq/kg. The elevated activity is chiefly due to the presence of natural radionuclides. The main artificial radionuclides are Cs-137 and Cs-134, whose contribution to the total activity...
Our study on the adverse impact of a polluted environment on children's health was made in Chorzów, a town commonly regarded as a region of ecological disaster. The percentage of infants with birthweight below 2500g is highest and average birthweight lowest in the most polluted districts of the town. Placental dysfunction as a negative effect of air pollution is the immediate reason of drastically...
The influence of acute carbon tetrachloride intoxication on hepatic and placental cytochrome P-450 content, and on NADPH-cytochrome P-450 reductase was examined in Wistar female rats. The animals were pretreated with a single dose of CC14 before pregnancy. The contents of the constituents of the MFO system were measured at term. The results revealed that the CCl4-mediated decrease at the total hepatic...
A new method of atmospheric sulphur dioxide determination based on the reaction of sulphite ions with triarylmethane dye on polymer film has been developed. The addition of sulphite to aqueous solutions of triarylmethane dyes causes bleaching of the dye by formation of the sulphite complex. On the polymer film different aspects of the reaction such as the type of polymer, polymer film thickness, and...
Strong oxidants are used in water treatment technology as disinfectants and/or technological factors. Chlorine, chlorine dioxide, ozone and potassium permanganate are used as strong oxidants. However, application of the oxidants may lead to formation of undesired products. Much research has recently focused on identification of those products. Ozone has been primarily used for oxidation of specific...
The growth of Albizia lebbeck benth., Peltophorum pterocarpum Baker and Ficus religiosa L. were slow during the initial period of May and early June, but during the later half the growth rate increased. All species showed less growth in the city areas of Gulshan-e-Iqbal, Nazimabad and Liaquatabad as compared to the University campus, which is a clean area. Among the species studied, P. pterocarpum...
This paper reports the results of kinetic studies of biodenitrication in which Bacillus licheniformis bacteria are involved, in a medium including either sodium glutamate or aspartic acid as the sole source of carbon. The determined kinetic parameters of the process proved that sodium glutamate is a more effective source of carbon in the process of nitrate reduction, but it is less preferred by bacteria...
The mainly purposes this paper to compare the atmospheric air contamination in different localities depending on the winter and summer season of the year, with use of the enrichment factor and the Principal Component Analysis. The lack of a clear correlation between the enriching coefficients of Pb and Cd as well Cr and Ni may indicate that over the town area masses of the air from different directions...
Some basic experiments of nitrous oxide determination, utilizing a classic double beam spectrometer were performed. Known amounts of nitrous oxide were measured in atmospheric air, helium and exhaust gases. The experiments allowed determination of N20 in amounts of 80 and 4 ppmv, employing standard and long-path gas cells, respectively.
Of both drugs studied only enflurane enhanced the activities of the following enzymes: succinate dehydrogenase (SD), thiamine pyrophosphatase (TPP-ase), and acid phosphatase (AcP). The activation of metabolic processes was maximal in group 3 (after 60 min anaesthesia) and group 4 (1 hr after 60 min anaesthesia), and persisted in group 5 (24 hr after 60 min anaesthesia). Furthermore, we found an increase...
The results of anaerobic treatment of molasses processing wastewater in labscale AHR are presented. The performance of the model has shown that wastewater from molasses processing in BIOPO Leopoldov is suitable for anaerobic treatment. In the reactor, anaerobic granulated biomass was cultivated. As follows from granulation process observation, intensive wash-out of the suspended biomass started at...
Results of a study on the content of cadmium and lead in the hair of persons in contact with these elements in their work place are presented. Hair was washed in order to remove exogenic contamination, and mineralized, and concentrations of the above elements were measured by differential pulse anodie stripping voltammetry (DPASV) in ammonium citrate buffer medium. The obtained results clearly point...
The concentrations of gamma emitters in grass samples of central-eastern Poland have been determined. The transfer factors for Cs-137 were calculated for particular samples. The effects of soil type, location of the sampling points and of potassium concentration on this transfer factor were studied.
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