Search Results - "Chróst, Ryszard J."

Presence and identification of Legionella and Aeromonas spp. in the Great Masurian Lakes system in the context of eutrophication by Grabowska, Karolina, Bukowska, Aleksandra, Kaliński, Tomasz, Kiersztyn, Bartosz, Siuda, Waldemar, Chróst, Ryszard J

“…Growing anthropopressure over the last several decades has resulted in rapid progressive eutrophication of the Great Masurian Lakes (GML) system located in…”
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Molecular (PCR-DGGE) versus morphological approach: analysis of taxonomic composition of potentially toxic cyanobacteria in freshwater lakes by Bukowska, Aleksandra, Bielczyńska, Aleksandra, Karnkowska, Anna, Chróst, Ryszard J, Jasser, Iwona

“…The microscopic Utermöhl method is commonly used for the recognition of the presence and taxonomic composition of potentially toxic cyanobacteria and is…”
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Factors controlling bacteria and protists in selected Mazurian eutrophic lakes (North-Eastern Poland) during spring by Kalinowska, Krystyna, Guśpiel, Adam, Kiersztyn, Bartosz, Chróst, Ryszard J

“…The bottom-up (food resources) and top-down (grazing pressure) controls, with other environmental parameters (water temperature, pH) are the main factors…”
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Microbial Production, Utilization, and Enzymatic Degradation of Organic Matter in the Upper Trophogenic Layer in the Pelagial Zone of Lakes along a Eutrophication Gradient by Chróst, Ryszard J., Siuda, Waldemar

“…The major aim of this study was to evaluate the relationships between the rates of microbial activities (phytoplankton primary production, bacterial secondary…”
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Persistence of bacterial proteolytic enzymes in lake ecosystems by Kiersztyn, Bartosz, Siuda, Waldemar, Chróst, Ryszard J.

“…Abstract This study analyzes proteolytic enzyme persistence and the role of dead (or metabolically inactive) aquatic bacteria in organic matter cycling…”
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Changes in protistan abundance and bacterial activity in response to the addition of eukaryotic inhibitors to natural lake water by Kalinowska, Krystyna, Jakubiec-Krześniak, Katarzyna, Chróst, Ryszard J

“…Keywords: Bacterial activity, Ciliates, Eukaryotic inhibitors, Eutrophic lakes, Nanoflagellates Introduction Grazing pressure by protists is an important…”
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Erratum - Presence and identification of Legionella and Aeromonas spp. in the Great Masurian Lakes system in the context of eutrophication by Grabowska, Karolina, Bukowska, Aleksandra, Kaliński, Tomasz, Kiersztyn, Bartosz, Siuda, Waldemar, Chróst, Ryszard J.

“…This corrects the article entitled “Presence and identification of Legionella and Aeromonas spp. in the Great Masurian Lakes system in the context of…”
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Do acid-tolerant picocyanobacteria exist? A study of two strains isolated from humic lakes in Poland by Jasser, Iwona, Karnkowska-Ishikawa, Anna, Chróst, Ryszard J.

“…The occurrence of picocyanobacteria, the smallest cell-size fraction of cyanobacteria, in low-pH waters, is still poorly studied. In this study, we tested the…”
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Microbial enzymatic activities in aerobic activated sludge model reactors by Li, Yin, Chróst, Ryszard J.

“…Communal, dairy and petroleum wastewaters were separately purified in three aerobic activated sludge model reactors to investigate selected enzymatic…”
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Abundance and Structure of Microbial Loop Components (Bacteria and Protists) in Lakes of Different Trophic Status by Chrost, Ryszard J., University of Warsaw, Warsaw, Poland, Tomasz, Adamczewski, University of Warsaw, Warsaw, Poland, Kalinowska, Krystyna, Hydrobiological Station, Centre for Ecological Research, Polish Academy of Sciences, Mikolajki, Poland, Skowronska, Agnieszka, University of Warmia and Mazury, Poland

“…The abundance, biomass, size distribution, and taxonomic composition of bacterial and protistan (heterotrophic and autotrophic nanoflagellates and ciliates)…”
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Seasonal and Spatial Diversity of Picocyanobacteria Community in the Great Mazurian Lakes Derived from DGGE Analyses of 16S rDNA and cpcBA-IGS Markers by Jasser, I., University of Warsaw, Warsaw, Poland, krolicka, A., University of Warsaw, Warsaw, Poland, Jakubiec, K., University of Warsaw, Warsaw, Poland, Chrost, R.J., University of Warsaw, Warsaw, Poland

“…The seasonal and spatial diversity of picocyanobacteria (Pcy) in lakes of the Great Mazurian Lakes (GLM) system was examined by DGGE analysis of molecular…”
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Inorganic phosphorus and nitrogen modify composition and diversity of microbial communities in water of mesotrophic lake by Chróst, Ryszard J, Adamczewski, Tomasz, Kalinowska, Krystyna, Skowrońska, Agnieszka

“…The effects of inorganic nutrients (N, P) enrichment of mesotrophic lake water on changes in bacterial and protistan (heterotrophic nanoflagellates and…”
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The Dynamics of Protein Decomposition in Lakes of Different Trophic Status Reflections on the Assessment of the Real Proteolytic Activity In Situ by Siuda, Waldemar (Warsaw University, Miecznikowa, Warsaw, Poland), E-mail: w.siuda@biol.uw.edu.pl, Kiersztyn, Bartosz (Warsaw University, Miecznikowa, Warsaw, Poland), Chrost, Ryszard J. (Warsaw University, Miecznikowa, Warsaw, Poland)

“…The aim of this paper is to discuss the methodology of our investigation of the dynamics of protein degradation and the total in situ proteolytic activity in…”
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Urea and ureolytic activity in lakes of different trophic status by Siuda, Waldemar, Chróst, Ryszard J

“…Urea and uraease (U-ase) activity were determined in water samples taken from the surface layers of 17 lakes of different trophic status. Urea concentrations…”
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Effect of organic phosphorus and nitrogen enrichment of mesotrophic lake water on dynamics and diversity of planktonic microbial communities--DNA and protein case studies (mesocosm experiments) by Chróst, Ryszard J, Adamczewski, Tomasz, Kalinowska, Krystyna, Skowrońska, Agnieszka

“…Effects of mesotrophic lake water enrichment with organic phosphorus and nitrogen substrates (DNA and model protein, bovine serum albumin--BSA) on dynamics and…”
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Kinetics of alkaline phosphatase activity and phosphorus availability for phytoplankton and bacterioplankton in lake plu\see (North German Eutrophic Lake) by Chróst, R J, Overbeck, J

“…Annual studies of kinetics of alkaline phosphatase (APA) activity and phosphorus availability for microplankton in the photic zone of an eutrophic lake are…”
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Enzymatic Activities in Petroleum Wastewater Purification System by an Activated Sludge Process by Li, Yin (Dong Hua University, Shanghai, People's Republic of China), E-mail: Liyin@mail.dhu.edu.cn, Chrost, Ryszard J. (Warsaw University, Miecznikowa, Warsaw, Poland)

“…The enzymology of an activated sludge system for a petroleum wastewater purification process was investigated. Leucine-aminopeptidase (L-AMP), β-glucosidase…”
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Characterization and Significance of $\beta-Glucosidase$ Activity in Lake Water by Chrost, Ryszard J.

“…Kinetics of $\beta-glucosidase$ activity $(\betaGlcA)$ and bacterial activity (glucose uptake, thymidine incorporation) and cell numbers were measured in the…”
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Presence and identification of Legionella and Aeromonas spp. in the Great Masurian Lakes system in the context of eutrophication: Legionella and Aeromonas spp. in the Great Masurian Lakes system by Grabowska, Karolina, Bukowska, Aleksandra, Kaliński, Tomasz, Kiersztyn, Bartosz, Siuda, Waldemar, Chróst, Ryszard J.

“…Growing anthropopressure over the last several decades has resulted in rapid progressive eutrophication of the Great Masurian Lakes (GML) system located in…”
Get full text

Molecular (PCR-DGGE) versus morphological approach: analysis of taxonomic composition of potentially toxic cyanobacteria in freshwater lakes by Bukowska, Aleksandra, Bielczynska, Aleksandra, Karnkowska, Anna, Chróst, Ryszard J, Jasser, Iwona

“…Background: The microscopic Utermöhl method is commonly used for the recognition of the presence and taxonomic composition of potentially toxic cyanobacteria…”
Get full text