National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Detection of cyanobacteria in raw water by in vivo fluorescence
Gregor, Jakub ; Šípková, H. ; Maršálek, Blahoslav
A method for fluorescence detection and quantification of cyanobacteria in raw water was implemented at the drinking water treatment plant. The procedure of implementation and calibration of the method is described.
The effects of the 2002 flood on the biocenosis of the open water of the Slapy reservoir in the following two years
Hrbáček, Jaroslav
In the two years following the flood, parameters of the transparency, pH, and relative frequency of the flocks of bluegreens are more similar to the parameters in the early nineties than to the values in two years before the flood. There are not clear differences in the presentation of individual groups of zooplankton in the two years after the flood and in two resp. one year before the flood. Significant negative nor even toxic effects of the development of the bluegreens were not observed.
Drinking water reservoir Nýrsko - influence of macrophytes on water quality
Hejzlar, Josef ; Hohausová, Eva ; Komárková, Jaroslava ; Kopáček, Jiří ; Peterka, Jiří ; Duras, J.
The importance of macrophytes in P cycling was studied in Nýrsko Reservoir, an oligotrophic water body in western Bohemia. A comparison of the external P loading with the P content in macrophytes of Nýrsko Reservoir in 2004 demonstrated that macrophytes can play a significant role in P-cycling also in deep, pelagial-dominated water bodies on condition that the external P loading is low and macrophytes have appropriate conditions for their growth (mainly small extent of water level fluctuation). Nýrsko Reservoir is an apparent example of situations from limnological textbooks when macrophytes function as a stabilizer of the aquatic ecosystem with an efficient zooplankton grazing on phytoplankton allowing suitable water quality for drinking water production.
The fluorescence assay of aminopeptidase activity as an alterantive indicator of water quality?
Vrba, Jaroslav ; Svoboda, J. ; Fuksa, J. K.
Recent water quality/pollution control uses standard chemical, biological or microbiological indicators that provide information on water status with a delay of several days. Though they characterise direct impact of released compounds on water quality in a recipient, they do not well reflect consequent reaction of the ecosystem on increased pollution. Following the Water Framework Directive 2000/60/EC we focused on such alternative microbial indicators that would allow for instant evaluation of ecological status of running waters and ongoing in-stream processes. Recently, activities of different extracellular enzymes have been suggested as indicators of both trophic status of lakes and organic or faecal pollution of streams. This contribution evaluates an indication potential of the extracellular aminopeptidase assay.

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