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One of many strategies of bacteria survival in a contaminated environment is plasmid-encoded resistance to toxic substances. D. desulfuricans wild strains isolated from soil and mud samples taken from contaminated sites were studied to identify plasmids in these bacteria and to examine their restriction profiles. The presence of plasmid DNA in all tested strains was demonstrated. Using B.stEII-digested...
The study compares growth rates and hydrogenase and APS-reductase activity in crude cell extracts obtained from eight wild strains of dissimilatory sulphate-reducing bacteria of the Desulfovibrio desulfuricans species, growing on sulphate or nitrate as sole energy source. The obtained results indicated that the investigated bacterial strains could utilize nitrate as an alternative terminal electron...
Metabolic activities of the museum and autochthonous strains of T. ferrooxidans bacteria, growing at temperatures 5, 10, 30 and 40°C in a liquid culture medium adjusted to pH 1.55, 1.8 or 2.3, were compared. The analysis of the dynamics of ferrous ion oxidation as well as bioextraction rate of titanium contained in wastes resulting from mining and burning lignite was carried out. The autochthonous...
W latach 1991-1993 przeprowadzono na poletkach doświadczalnych w ODR w Starym Polu badania nad zdrowotnością buraka cukrowego uprawianego w 6- i 3-polowym płodozmianie. Jednocześnie z wyżej wymienionymi doświadczeniami polowymi wykonano obserwacje terenowe na polach produkcyjnych buraka cukrowego. W okresie wegetacji na liściach buraka wystąpiły następujące choroby: chwościk buraka (Cercospora beticola),...
The possibility of utilization wastes resulting from mining and burning lignite using the method of microbiological leaching has been presented. It has been found, that high yield (40-80%) of the recovery of metals (Cu, As, Mn, Ga, Be, V, Ti) in the presence of a mixture of Thiobacillus bacteria: T. ferrooxidans and T. thiooxidans, is possible. The effectiveness of metals leaching (basing on titanium...
Praca przedstawia wyniki trzyletnich badań nad zdrowotnością podstawy źdźbła pszenicy jarej uprawianej w zmianowaniu i w monokulturze. Przeprowadzono również badania dotyczące mikoflory podstawy źdźbła pszenicy jarej z objawami zgorzeli podstawy źdźbła (Gaeumannomyces graminis) i łamliwości źdźbła (Pseudocercosporella herpotrichoides). Stwierdzono, że uprawa pszenicy jarej w monokulturze wpływa niekorzystnie...
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