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Characterization of extracellular and intracellular organic matter produced by phytoplankton in relation to water treatment
Zezulová, Tereza ; Pivokonský, Martin (advisor) ; Janda, Václav (referee)
This study investigated characteristics of algal organic matter (AOM) derived from four species (cyanobacteria Microcystis aeruginosa and Merismopedia tenuissima, diatom Fragilaria crotonensis and green alga Chlamydomonas geitleri) dominating phytoplanktonic populations in the reservoirs supplying drinking water treatment plants - the water reservoirs Švihov (the Želivka water treatment plant) and Josefův Důl (the Jizerské Mountains), Czech Republic. The four mentioned microorganisms were cultivated under laboratory conditions and the algal growth was quantified by a number of cells, chrorophyll-a and optical density. Production of AOM was evaluated by dissolved organic carbon concentration measurements, by specific UV absorbance, the amount of peptide/protein and non-peptide (carbohydrate) contents, water affinity and molecular weight (MW). AOM of all considered microorganisms are formed predominantly by hydrophilic substances with low values of specific UV absorbance (< 2 L/(m.mg)). Considerable portions of both types of AOM, i.e. extracellular and cellular organic matters are represented by substances with MW < 1 kDa or with MW > 100 kDa. However, the total amount and composition of AOM significantly depend on algal species and their growth. The obtained results imply that the knowledge of AOM...
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Voda v různých formách a v proměnách historie zahradního prostoru
Zezulová, Tereza
The thesis deals with various forms of water use in the garden space, including their historical development. As the proposed territory the lands of a now disappeared complex of the spa in the village Petrov were chosen. The spa was in operation from the 16th century until 1987. The theoretical part of the thesis was elaborated in the form of a literary review dealing with the importance of water in the public space and landscape, the characteristics of spa industry, the changes in water usage in different cultures and in different historical periods, the psychological effects of water, the sociocultural aspect of water, the philosophical nature of water, the symbolism or the contemporary possibilities of its usage in garden spaces. The analytical part presents the results of field surveys and further investigation. The results of the analyzes are interpreted through graphical outputs and written conclusions are drawn from them. The basics for the design part of the thesis were based on the theoretical and analytical part of the thesis. The design is presented by a situation which suitability is further verified through cutting-in perspectives and perspectives.
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Characterization of extracellular and intracellular organic matter produced by phytoplankton in relation to water treatment
Zezulová, Tereza ; Pivokonský, Martin (advisor) ; Janda, Václav (referee)
This study investigated characteristics of algal organic matter (AOM) derived from four species (cyanobacteria Microcystis aeruginosa and Merismopedia tenuissima, diatom Fragilaria crotonensis and green alga Chlamydomonas geitleri) dominating phytoplanktonic populations in the reservoirs supplying drinking water treatment plants - the water reservoirs Švihov (the Želivka water treatment plant) and Josefův Důl (the Jizerské Mountains), Czech Republic. The four mentioned microorganisms were cultivated under laboratory conditions and the algal growth was quantified by a number of cells, chrorophyll-a and optical density. Production of AOM was evaluated by dissolved organic carbon concentration measurements, by specific UV absorbance, the amount of peptide/protein and non-peptide (carbohydrate) contents, water affinity and molecular weight (MW). AOM of all considered microorganisms are formed predominantly by hydrophilic substances with low values of specific UV absorbance (< 2 L/(m.mg)). Considerable portions of both types of AOM, i.e. extracellular and cellular organic matters are represented by substances with MW < 1 kDa or with MW > 100 kDa. However, the total amount and composition of AOM significantly depend on algal species and their growth. The obtained results imply that the knowledge of AOM...
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Biogenic volatile organic compounds and prodution of surface ozone
Zezulová, Tereza ; Bednář, Jan (advisor) ; Hůnová, Iva (referee)
In the middle of the past century, during the industrial revolution, the concentration of air pollutants such as SO2, CO and NOX has rapidly increased. The attention was also given to organic pollutants, for example: monoterpenes and isoprene, in the last twenty years. These compounds are released into the air by natural processes. The most common are isoprene and terpenes that are emited by plants and trees. Concentrations of these biogenic volatile organic compounds (BVOC) are in a range from several ppt to a few ppb. The role of BVOC in plants and trees is still unclear. One of the possible roles of isoprene is controlling the time of blossom, which could be useful for regulativ of pollination. Another role could be in plant toleration of ozone and heat stress. Monoterpenes occur in flower scents and in plant signalization and could function as temptation for insect during pollination. The interaction of BVOC with radicals of OH· and NO3· causes increase of troposferical ozone, a secondary pollutant. Higher concentrations of tropospheric ozone are responsible for fogs above widespread vegetation. Other pollutants made of BVOC are secondary organic aerosols (SOA), that can disperse or absorb the solar radiation. This affects energetic balance on the Earth . This work points to the possibility of...
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