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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Stanovení oxidu siřičitého ve víně standardními i alternativními metodami

Dufek, Petr January 2014 (has links)
This thesis focuses on the study of domestic and foreign literature on the determination of sulfur dioxide in wine. A detailed description of the standard and alternative methods, their analysis, identification of possible shortcomings or disadvantages and specifying strengths and advantages. Theory obtained by studying literature is verified by a several samples of wine are provided different forms of sulfur dioxide with different methods . Subsequently, the results obtained by various methods are compared in terms of accuracy and applicability in the viticultural practice. Everything should be processed in order that the thesis could become an additional study material for university students.
2

Možnosti využití energosádrovců a druhotných surovin obsahujících siřičitany pro přípravu kompozitů / Utilization possibilities of industry gypsum and secondary materials containing for preparation of composites

Weiglová, Jana January 2010 (has links)
The work studies the possibilities of the utilization of secondary raw materials produced by power industry. It addresses mainly the gypsum by-products and fluidized coal combustion ash. As for the secondary raw materials the content of sulphites is observed and the dependences of their transformation to sulphides via natural oxidation by air oxygen or by addition of adequate oxidant are studied. The work follows with describing the effect of sulphides contained in raw materials on the mechanical properties of composites prepared from several various matrices such as alumina or portland cement, lime or portland clinker. As for pure portland clinker the ability to retard the setting is also observed. The amount of contained sulphites is measured volumetrically via indirect titration of iodine surplus by sodium thiosulphate with the starch size as the indicator.

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