Search for dissertations about: "A Horvath"

Showing result 1 - 5 of 8 swedish dissertations containing the words A Horvath.

2. 1. The effects of cellulosic fiber charges on polyelectrolyte adsorption and fiber-fiber interactions

   Author : A. Elisabet Horvath; Lars Wågberg; Stefan Zauscher; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adsorption; electrolyte; polyelectrolyte; polyelectrolyte titration; stoichiometry; fluorescence; CLSM; carboxymethylation; ESCA; charge ration; colloidal interactions; mechanical forces; network strength; floc; CPM; rehometer; Cellulose and paper engineering; Cellulosa- och pappersteknik;

   Abstract : The surface charges of cellulosic fibers contribute to several papermaking operations that influence the manufacture and final properties of paper. This thesis investigates the effect of the surface charges on wet-end chemistry, e.g. READ MORE

4. 2. Appropriate conditions for polyelectrolyte titration to determine the charge of cellulosic fibers

   Author : Elisabet Horvath; KTH; []
   Keywords : adsorption; electrolyte; polyelectrolyte; ;

   Abstract : The polyelectrolyte titration method has been developed overthe years in order to determine the surface charge ofcellulosic fibers. The conditions have been varied depending onthe author. READ MORE

5. 3. Population genomic analyses of regulatory variation and selection in Brassicaceae species

   Author : Robert Horvath; Tanja Slotte; Peter Hambäck; Douglas G. Scofield; Matthew Webster; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Capsella grandiflora; Arabidopsis thaliana; Arabidopsis lyrata; natural selection; gene expression variation; DNA and gene body methylation; transposable elements; DNA accessibility; gene expression noise; epigenetic silencing; linked selection; ekologi och evolution; Ecology and Evolution;

   Abstract : The impact of selection on regulatory variation and the contribution of regulatory changes to phenotypic variation has long been debated in evolutionary genetics. Because cis-regulatory elements such as promoters and enhancers can be difficult to identify, it has been more challenging to quantify the impact of selection on variation in cis-regulatory regions than in protein-coding regions. READ MORE

6. 4. Palladium(II)-Catalyzed Reactions of Allenes with Lithium Bromide and Cyclization of α-Amino Allenes to Pyrrolines

   Author : Attila Horváth; Jan-Erling Bäckvall; Tobias Rein; Stockholms universitet; []
   Keywords : Palladium; allene; pyrroline; palladium II -catalysis;

   Abstract : This thesis is based on three novel palladium(II)-catalyzed reactions of allenes with lithium bromide and a bromonium ion induced cyclization of allenyl amides to pyrrolines. In Paper I a 1,2-functionalization of allenes is presented where bromide adds as a first nucleophile followed by intramolecular attack by an oxygen or nitrogen nucleophile. READ MORE

7. 5. Chemical Methods for Improving the Fracture Toughness of Paper

   Author : Andrew T. Horvath; Lars Wågberg; Theo van de Ven; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemistry; physical chemistry; Cellulose and paper engineering; Cellulosa- och pappersteknik;

   Abstract : Paper is a network material composed of a great number of fibers that interact with each other through fiber joints. In order to make a clear statement regarding observed changes being made in paper, it is vital to determine the structural level of paper that is being affected by chemical modifications. READ MORE