Number of found documents: 3529
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Detection and identification of aflatoxins and microcystins by means of portable liquid chromatograph for purpose of control of biological weapons prohibition
Lunerová, K.; Šesták, Jozef
2022 - Czech
The methodology utilizes a portable liquid chromatograph for rapid detection and identification of selected aflatoxins and microcystins. It is primarily designated for SÚJCHBO, v. v. i. to control the compliance with the law 281/2002 Sb. Metodika využívá přenosný kapalinový chromatograf pro rychlou detekci a identifikaci vybraných aflatoxinů a mikrocystinů a je určena zejména pro potřeby SÚJCHBO, v. v. i. při kontrolní a dozorové činnosti v oblasti dodržování Zákona č. 281/2002 Sb. Keywords: microcystins; aflatoxins; portable liquid chromatograph Available on request at various institutes of the ASCR
Detection and identification of aflatoxins and microcystins by means of portable liquid chromatograph for purpose of control of biological weapons prohibition

The methodology utilizes a portable liquid chromatograph for rapid detection and identification of selected aflatoxins and microcystins. It is primarily designated for SÚJCHBO, v. v. i. to control the ...

Lunerová, K.; Šesták, Jozef
Ústav analytické chemie, 2022

Complex survey of the fish stock of Karhov, Obecnice and Pilská Reservoirs in 2021.
Muška, Milan; Blabolil, Petr; Kočvara, Luboš; Soukalová, Kateřina
2022 - Czech
The report describes the results of an complex survey of Karhov, Obecnice and Pilská Reservoirs fish assemblages and recommendations for their further management. Zpráva popisuje výsledky ichtyologického průzkumu nádrží Karhov, Pilská a Obecnice a doporučení pro jejich další obhospodařování. Keywords: fish community; Brdy Protected Area; survey Available at various institutes of the ASCR
Complex survey of the fish stock of Karhov, Obecnice and Pilská Reservoirs in 2021.

The report describes the results of an complex survey of Karhov, Obecnice and Pilská Reservoirs fish assemblages and recommendations for their further management.

Muška, Milan; Blabolil, Petr; Kočvara, Luboš; Soukalová, Kateřina
Biologické centrum, 2022

Content of iron and quality of organic matter as a factor affecting stabilization of carbon and nutrients in fresh water ecosystems.
Osafo, Nana O. A.; Jan, Jiří; Porcal, Petr; Borovec, Jakub
2022 - Czech
The effect of watershed geochemistry, in terms of soil pH, Fe concentration and organic matter quality, on the stability of organic carbon and nutrients level in freshwater sediments of shallow lakes was studied. Twelve fishponds were divided into two groups based on the typical soil pH: i) watershed with acidic soils (pH 5.1 – 6.3) rich in Fe called H_Fe and ii) watershed with neutral pH soils (pH 6.8 – 7.6) poor in Fe called L_Fe. The parameters of the water column, pore water and sediment chemical extractions were compared. A higher concentration of hydrated Fe oxides, together with the aromatic character of organic substances were shown to highly contribute to the overall stabilization of the sediment. Conversely, low Fe concentrations were accompanied by lower mineralization of sediments and a higher risk for the aquatic ecosystem in terms of nutrient release or the development of anoxic conditions. Studie ukazuje, jak geochemické vlastnosti povodí, reprezentované obsahem Fe a hodnotami pH a s tím související kvalitou organických látek v půdách, ovlivňuji stabilizaci organického uhlíku a živin v sedimentech mělkých nádrží. V rámci prezentované studie bylo sledováno 12 rybníků z různých lokalit České republiky. Rybníky byly rozděleny na základě geologie povodí do dvou skupin i) povodí s kyselými půdami (pH 5,1 - 6,3) bohatými na železo (H_Fe) a ii) povodí s neutrálními půdami (pH = 6,8–7,6) a nízkým obsahem železa (L_Fe). Ve sledovaných rybnících byly porovnávaný parametry vodního sloupce, pórové vody a extrakce sedimentů z hlediska stabilizace organické hmoty a navazujících živinových koloběhů. Bylo ukázáno, jak vyšší koncentrace hydratovaných oxidů Fe, spolu s aromatickým charakterem organických látek přispívá k celkové stabilizaci sedimentu. Naopak nízké koncentrace Fe byly doprovázeny nižší mineralizaci sediment a vyšší rizikovosti pro vodní ekosystém z hlediska uvolňovaní živin nebo rozvoje anoxii. Keywords: sediments; watersheds; organic matter quality Available at various institutes of the ASCR
Content of iron and quality of organic matter as a factor affecting stabilization of carbon and nutrients in fresh water ecosystems.

The effect of watershed geochemistry, in terms of soil pH, Fe concentration and organic matter quality, on the stability of organic carbon and nutrients level in freshwater sediments of shallow lakes ...

Osafo, Nana O. A.; Jan, Jiří; Porcal, Petr; Borovec, Jakub
Biologické centrum, 2022

Radon in a lake – an estimation of ground water input.
Porcal, Petr
2022 - Czech
A balance study of radon activity in Lake Plešný and its tributaries was carried out in 2020 to refine the estimate of groundwater resources. The balance is based on quantification of sources, monitoring of the amount of water draining from the lake, and lead concentrations in the overlying sediments. V roce 2020 byla realizována bilanční studie aktivity radonu v Plešném jezeře a jeho přítocích s cílem zpřesnění odhadu zdrojů podzemní vody. Bilance je založena na kvantifikaci zdrojů, monitorování množství vody odtékající z jezera a koncentrace olova ve vrchních vrstvách sedimentů. Keywords: radon; water balance; lake Available at various institutes of the ASCR
Radon in a lake – an estimation of ground water input.

A balance study of radon activity in Lake Plešný and its tributaries was carried out in 2020 to refine the estimate of groundwater resources. The balance is based on quantification of sources, ...

Porcal, Petr
Biologické centrum, 2022

Fish stock monitoring in Kamenný fishpond in 2022.
Draštík, Vladislav; Jůza, Tomáš; Blabolil, Petr
2022 - Czech
The report summarizes the research result of stock assessment in Kamenný pond in 2022. Zpráva sumarizuje výsledky průzkumu Kamenného rybníka v roce 2022. Keywords: electrofishing; fish communities; biomanipulation Available at various institutes of the ASCR
Fish stock monitoring in Kamenný fishpond in 2022.

The report summarizes the research result of stock assessment in Kamenný pond in 2022.

Draštík, Vladislav; Jůza, Tomáš; Blabolil, Petr
Biologické centrum, 2022

Assessment of the status of rheophilic fish in the Vltava basin and key factors affecting their populations.
Šmejkal, Marek; Bartoň, Daniel
2022 - Czech
The report describes ecological status of fish in Vltava River basin with special attention to rheophilic fish species. Zpráva popisuje vyhodnocení ekologického potenciálu v povodí Vltavy s důrazem na výskyt a reprodukci reofilních ryb. Keywords: habitat degradation; rheophilic fish; stranding Available at various institutes of the ASCR
Assessment of the status of rheophilic fish in the Vltava basin and key factors affecting their populations.

The report describes ecological status of fish in Vltava River basin with special attention to rheophilic fish species.

Šmejkal, Marek; Bartoň, Daniel
Biologické centrum, 2022

Hydrobiological monitoring of Lake Medard in 2021.
Peterka, Jiří; Hejzlar, Josef; Nedoma, Jiří; Znachor, Petr; Seďa, Jaromír
2022 - Czech
The report summarizes the research results of the limnological components of the ecosystem of the newly created Medard postmining lake achieved for the year 2021 and recommendations for further monitoring. Zpráva sumarizuje dosažené výsledky výzkumu limnologických složek ekosystému nově vzniklého důlního jezera Medard za rok 2021 a doporučení pro další sledování. Keywords: ecology; restoration; mining lakes Available at various institutes of the ASCR
Hydrobiological monitoring of Lake Medard in 2021.

The report summarizes the research results of the limnological components of the ecosystem of the newly created Medard postmining lake achieved for the year 2021 and recommendations for further ...

Peterka, Jiří; Hejzlar, Josef; Nedoma, Jiří; Znachor, Petr; Seďa, Jaromír
Biologické centrum, 2022

Report from selected sites of the Hydrobiological Excursion in 2022.
Blabolil, Petr; Bláha, M.; Kajgrová, L.; Kaštovský, J.; Kolář, Vojtěch; Vrba, Jaroslav
2022 - Czech
The report describes the results of sampling and determination of biological components (fish, zoobenthos, periphyton) in selected sites visited during the Hydrobiological Excursion. Zpráva popisuje výsledky odběru a určení biologických složek (ryby, zoobentos, perifyton) ve vybraných lokalitách navštívených během Hydrobiologické exkurze. Keywords: community; limnology; fish Available at various institutes of the ASCR
Report from selected sites of the Hydrobiological Excursion in 2022.

The report describes the results of sampling and determination of biological components (fish, zoobenthos, periphyton) in selected sites visited during the Hydrobiological Excursion.

Blabolil, Petr; Bláha, M.; Kajgrová, L.; Kaštovský, J.; Kolář, Vojtěch; Vrba, Jaroslav
Biologické centrum, 2022

23rd Mass Spectrometry School. Short course E. Data analysis in Graphpad software - practically, graphically and simply
Cvačka, Josef; Vrkoslav, Vladimír; Hubálek, Martin; Vlk, Mikuláš
2022 - Czech
Keywords: data analysis; hypothesis testing; group comparison Available at various institutes of the ASCR
23rd Mass Spectrometry School. Short course E. Data analysis in Graphpad software - practically, graphically and simply

Cvačka, Josef; Vrkoslav, Vladimír; Hubálek, Martin; Vlk, Mikuláš
Ústav organické chemie a biochemie, 2022

Cathodoluminescence imaging of carotenoids in biological specimens using cryo-scanning electron microscopy using a functional sample of CRYTUR cathodoluminescence detector
Vancová, Marie; Krzyžánek, Vladislav; Skoupý, Radim; Horodyský, P.
2022 - Czech
Here, we report for the first time the cathodoluminescence properties of carotenoids present in different biological specimens (Diplonemidae spp, carrot root, Arabidopsis embryos, algae Vischeria sp., unicellular pigmented yeast Rhodontorula, hen´s egg yolk) using cryo-SEM. The presence of carotenoids was proven by Raman spectroscopy. Zde poprvé referujeme o katodoluminiscenčních vlastnostech karotenoidů přítomných v různých biologických vzorcích (Diplonemidae spp, kořen mrkve, embrya Arabidopsis, řasa Vischeria sp., jednobuněčná pigmentovaná kvasinka Rhodontorula, žloutek slepičího) pomocí kryo-SEM. Přítomnost karotenoidů byla prokázána Ramanovou spektroskopií. Keywords: cathodoluminescence; scanning electron microscopy; detector Available at various institutes of the ASCR
Cathodoluminescence imaging of carotenoids in biological specimens using cryo-scanning electron microscopy using a functional sample of CRYTUR cathodoluminescence detector

Here, we report for the first time the cathodoluminescence properties of carotenoids present in different biological specimens (Diplonemidae spp, carrot root, Arabidopsis embryos, algae Vischeria sp., ...

Vancová, Marie; Krzyžánek, Vladislav; Skoupý, Radim; Horodyský, P.
Biologické centrum, 2022

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