Advanced search

Showing result 1 - 5 of 1069 swedish dissertations matching the above criteria.

2. 1. Analytical Aspects of Atmospheric Pressure Ionisation in Mass Spectrometry

   Author : C. Fredrik Bökman; J. David Pinkston; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Analytisk kemi; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Abstract : The actual signal recorded with an analytical instrument is not always a true reflection of the analysed sample. In this thesis a further insight of the atmospheric pressure ionisation processes electrospray (ESI) and atmospheric pressure chemical ionisation (APCI) has been endeavoured, to provide a deeper understanding of and ways to minimize this bias. READ MORE

4. 2. Variance Reduction in Analytical Chemistry : New Numerical Methods in Chemometrics and Molecular Simulation

   Author : K. Magnus Åberg; Sven P. Jacobsson; Richard G. Brereton; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; chemometrics; pulse-coupled neural networks; peak alignment; class separability; molecular dynamics; Monte Carlo; expanded ensembles; free energy; Analytical chemistry; Analytisk kemi;

   Abstract : This thesis is based on five papers addressing variance reduction in different ways. The papers have in common that they all present new numerical methods. READ MORE

5. 3. Retention time predictions in Gas Chromatography

   Author : Yasar Thewalim; Anders Colmsjö; Torgny Fornstedt; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; gas chromatography; computer simulation; two-parameter model; retention time prediction; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

   Abstract : In gas chromatography, analytes are separated by differences in their partition between a mobile phase and a stationary phase. Temperature-program, column dimensions, stationary and mobile phases, and flow rate are all parameters that can affect the quality of the separation in gas chromatography. READ MORE

6. 4. Long-Term Simulation of Coastal Evolution

   Author : Hoan Le Xuan; Avdelningen för Teknisk vattenresurslära; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tidal inlet; inlet shoal; sediment transport; spit growth; shoreline change; spit model; inlet model; mathematical model; numerical model; shoreline model;

   Abstract : There is a strong relationship between regional sediment transport and the local processes at tidal inlets and around coastal structures. Many coastal projects require quantitative understanding of these processes and the interactions between them. READ MORE

7. 5. Lignin-carbohydrate complexes: Model compounds synthesis

   Author : Filip Nylander; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lignin-carbohydrate complex; lignin model compounds; lignocellulose;

   Abstract : In lignocellulose there is a recalcitrant interaction by covalent and non-covalent bonds called the lignin-carbohydrate complex. This interaction has been the subject of studies trying to unveil its chemical structure, to understand the mechanims involved in its formation and to determine its influence on practical applications such as the process of turning biomass into ethanol. READ MORE