Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

The characteristics of growth of bacilli formed fouling on wooden constructions

100%

Basarab V. Y., Voronkova O. S., Voronkova Y. S., Severynovska O. V.

International Letters of Natural Sciences

|

2018

|

tom 70

Problem of biofilm formation have a great significance for environmental microbiological research. Biospheric microorganisms can form biofilm, that provide bacteria resistance to influence of different environmental factors. Some of the most common bacteria in biosphere are bacilli, among them there are film-forming strains. Bacillus spp. is a well-known film forming microorganisms that colonize environmental objects. The biofilm fouling of underwater elements of small wooden constructions located on the Dnieper River near the city of the Dnipro (Ukraine) was studied. It was found that biofilms from surfaces of water constructions include bacilli. It is established that the mean values of CFU in samples from running and still water were (1.81±0.52)×10⁸ and (1.83±0.53)×10⁸ CFU / ml respectively per area of wooden sample approximately 1 cm², while during the laboratory cultivation of the film, formed by these cultures on the plate, the number of cells was (4.90±0.93)×10⁷ and (4.60±1.07)×10⁷ CFU / ml per 1 cm² of the well’s bottom, which was an approximate limit of the content of cells of the Bacillus spp. film per unit of area.

2

Ecosystem condition and water quality control at impounded sections of rivers by the regulated hydrological regime

100%

Timchenko V., Oksiyuk O.

International Journal of Ecohydrology and Hydrobiology

|

2002

|

tom 02

|

nr 1-4

Hydrological regime at impounded sections of rivers is regulated by releases from upstream hydroelectric power stations (HEPS). Therefore regulated hydrological regimes can be used to manage ecosystem condition and water quality control. The hydraulic regime determines the functioning of main channel ecosystems; the daily level fluctuations caused by the peak operational regime of HEPS provide the well-being of the connected network (side-arms, flood-plain lakes, ox-bows etc.) and its effect on the water quality in the main channel. The dissolved oxygen concentration and biochemical oxygen demand are the integrated indices of ecosystem condition and water quality. The reason is that these indices reflect structure and functioning of water ecosystems as a whole, particularly the dependence of organic matter production and decomposition biological processes (self-contamination and self-purification) on hydrological parameters as abiotic components of ecosystems. The models describing dissolved oxygen dynamics and organic matter (by BODtot) concentration at impounded sections of rivers in dependence on water regime parameters are developed. This controlling method is aplied at the impounded sections of Dnieper-River.

3

Genesis and age of the terraces of the Dnieper River between Orsha and Shklov, Byelorussia

80%

Kalicki T., Sanko A. F.

Geographia Polonica

|

1992

|

tom 60

4

Potamogeton species of the Kholmech flora in Belarus

80%

Velichkevich F. Y., Lesiak M. A.

Acta Palaeobotanica

|

1999

|

tom 39

|

nr 1

5

Stosunki wodne Polesia

51%

Michalczyk Z., Bartoszewski S., Turczynski M.

Acta Agrophysica

|

2002

|

tom 66

49-76

Ograniczanie wyników

1 Acta Agrophysica

1 Acta Palaeobotanica

1 Geographia Polonica

1 International Journal of Ecohydrology and Hydrobiology

1 International Letters of Natural Sciences

1 Bartoszewski S.

1 Basarab V. Y.

1 Kalicki T.

1 Lesiak M. A.

1 Michalczyk Z.

1 Oksiyuk O.

1 Sanko A. F.

1 Severynovska O. V.

1 Timchenko V.

1 Turczynski M.

1 Velichkevich F. Y.

1 Voronkova O. S.

1 Voronkova Y. S.

1 2018

2 2002

1 1999

1 1992

The characteristics of growth of bacilli formed fouling on wooden constructions

Ecosystem condition and water quality control at impounded sections of rivers by the regulated hydrological regime

Genesis and age of the terraces of the Dnieper River between Orsha and Shklov, Byelorussia

Potamogeton species of the Kholmech flora in Belarus

Stosunki wodne Polesia