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Visar resultat 1 - 5 av 109 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Development of Liquid-based Separation Techniques using Tailored Surfaces for Analysis of Biological Samples

   Författare :Emilia Hardenborg; Jonas Bergquist; Marit Andersson; Alejandro Cifuentes; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aqueous humor; biological samples; capillary electrophoresis; coatings; drugs; liquid chromatography; molecular imprinted polymers; peptides; proteins; pseudoexfoliation; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Development and improvement of analytical techniques are vital in analytical chemistry research. This thesis describes the development and use of tailored surfaces for bioanalytical applications. LÄS MER

3. 2. Novel on-line mid infrared detection strategies in capillary electrophoretic systems

   Författare :Malin Kölhed; Bo Karlberg; Sven P. Jacobsson; Andre' J. Sommer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; on-line hyphenation; mid infrared detection; capillary electrophoresis; FTIR; quantum cascade laser; aqueous samples; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Infrared absorption spectra can provide analytically useful information on a large variety of compounds, ranging from small ions to large biological molecules. In fact, all analytes that possess a dipole moment that changes during vibration are infrared-active. The infrared (IR) spectrum can be subdivided into far-, mid- and near- regions. LÄS MER

4. 3. Molecular Interaction in Aqueous Solutions : Effects of Temperature and Solutes on Surface Structure and Hydrogen Bonding in Water

   Författare :Clara-Magdalena Saak; Carl Caleman; Olle Björneholm; Nicusor Timneanu; Edwin Kukk; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Intermolecular forces in liquids can give rise to complex emergent structures, particularly in water, where hydrogen bonding causes the formation of extended networks, and surfaces, where intermolecular structures can be distinctly different from the bulk, leading to unique properties and behaviours. While such structures have been studied in detail, it is still relatively unknown how such structures respond and adapt to external changes to their environment. LÄS MER

5. 4. PCR-based detection of microorganisms in complex biological samples

   Författare :Pär-G Lantz; Teknisk mikrobiologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Density gradient centrifugation; DNA extraction; Aqueous two-phase systems; Meat; Faeces; Cheese; Yeast; Helicobacter pylori; Yersinia enterocolitica; Listeria monocytogenes; PCR; Inhibition; Sample preparation; Microbiology; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi;

   Sammanfattning : The detection of microorganisms by PCR can be divided into four steps: (1) sample collection, (2) sample preparation, (3) DNA amplification and (4) detection of PCR products. The major problem in developing PCR-based detection methods is the sample preparation step. LÄS MER

7. 5. Fractionation of Fe and Zn isotopes : methods and some applications in aqueous geochemistry

   Författare :Dmitry Malinovskiy; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

   Sammanfattning : Multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS) has been used for the measurement of Fe and Zn isotope ratios in a variety of sample types including natural and synthetic waters, ferromanganese concretions, sediments and biological material. The focus of this PhD study was the development of analytical procedures for precise and accurate measurement of Fe and Zn isotope ratios by high resolution MC-ICPMS. LÄS MER