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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 11 to 12 of 12 (0.047 seconds)Spelling suggestions: "subject:"maker's least"" "subject:"maker's years""
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Modelling, optimization and control of yeast fermentation processes in food industryRichelle, Anne 31 March 2014 (has links)
A macroscopic model describing the main physiological phenomena observed during the fed-batch baker’s yeast production process and including the influence of nitrogen on the key bio-mechanisms is proposed. First, on the basis of a set of biological reactions, inspired by the model of Sonnleitner and Käppeli, a model in which the nitrogen and glucose consumption are coordinated is proposed. Second, an attempt of estimating storage carbohydrate contents in yeast cells through an extension of this model is presented. The model is identified and validated with experimental data of fed-batch yeast cultures and successfully predicts the dynamics of cell growth, substrate consumption (nitrogen and carbon sources) and metabolite production (ethanol and storage carbohydrates). <p><p>The developed model was used for the determination of optimal operating conditions, in the sense of a production criterion. To this end, two different approaches were used: a control vector parameterization approach and a semi-analytical formulation of the optimal operating policy. The two approaches were compared with numerical and experimental data. The results of the two approaches lead to the determination of similar optimal operation conditions, which have been implemented for a new experimental phase. Moreover, these optimal conditions are in agreement with the profiles obtained by industrial manufacturers through an empirical optimization of the process.<p> / Doctorat en Sciences de l'ingénieur / info:eu-repo/semantics/nonPublished
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Translational control by the ribosomal protein Asc1p/Cpc2p in Saccharomyces cerevisiae / Translationelle Kontrolle durch das ribosomale Protein Asc1p/Cpc2p in Saccharomyces cerevisiaeRachfall, Nicole 27 October 2010 (has links)
No description available.
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