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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Odpoveď ekotypov Arabidopsis na abiotický stres
 Zvalová, Monika
Distribution of a given plant species reflects its ability to acclimate to different natural environmental conditions. Plant acclimation to cold is of high importance because of recent raise of abundance of temperature extremes. The aim of this thesis was a characterization of twentytwo selected Arabidopsis ecotypes after sub-zero treatment and identification of those that are associated with effective cold acclimation. This evaluation of the processes involved in cold protection was enabled by substantial variability in the frost tolerance among these contrasting ecotypes. We identified frost tolerant and sensitive ecotypes that were further characterized by rosette area and photosynthetic pigments measurement. These results correspond with geographical distribution of a given species. The next step will be proteomic analysis of selected ecotypes to identified molecular processess involved in freezing stress tolerance. The adaptation of individual Arabidopsis ecotypes to different environmental conditions, resulting in a wide range of frost hardiness, offers unique possibility to elucidate mechanisms associated with efficient defence to low temperatures.Formula clause:I agree that my work will be published in accordance with § 47b of Act no. 111/1998 Coll., On Higher Education Institutions and on Amendments to Other Acts (Higher Education Act), as amended, and in accordance with the valid Directive on the Publishing of Higher Education Final Works
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Effects of temperature extremes on hospital admissions for cardiovascular diseases
 Urban, Aleš ; Kyselý, Jan (advisor) ; Huth, Radan (referee)
Faculty of Sicence, Charles University Aleš Urban, Praha 2012 Effects of temperature extremes on hospital admissions for cardiovascular diseases The thesis compares differences in the impacts of warm and cold days on both excess mortality and hospitalizations for individual cardiovascular diseases (CVDs) in Prague and a selected rural region (southern Bohemia - JČ) consisting of the Jihočeský kraj and Vysočina districts in the period 1994- 2009. Population size and age structure are similar in the two regions. The differences are compared between selected population groups (men and women; < 65 and 65+ years). Value of the 90% (10%) percentile of daily mean air temperature in summer (winter) during the period were used for the definition of warm (cold) days for each region separately. The excess mortality and hospitalizations were determined as the difference from standardized daily counts of death and hospital admissions, adjusted for epidemics of influenza/acute respiratory infections, long-term changes, and for annual and weekly cycles of mortality and hospitalizations. Generally higher relative excess CVD mortality on warm days was identified in Prague, while for cold days we found higher excess mortality in south Bohemia. In contrast to mortality, weak excess CVD hospitalizations were observed for both...
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