Sökning: "Leif A. A. Pettersson"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Leif A. A. Pettersson.

1. 1. Optical Modeling and Characterization of Layers and Multilayer Structures : Organic Optoelectronic Devices and Spectroscopic Ellipsometry

   Författare :Leif A. A. Pettersson; Robert W. Collins; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This dissertation is on the subject of modeling and characterization of layers and multilayer structures with respect to their optical properties and characteristics. A number of different systems have been investigated; among them multilayer structures in the form of organic optoelectronic devices, anisotropic layers of conjugated polymers as well as inhomogeneous layers of porous silicon and oxidized silver. LÄS MER

3. 2. tRNA Gene Structures in Bacteria

   Författare :B. M. Fredrik Pettersson; Leif A. Kirsebom; Anders Byström; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cell and molecular biology; Cell- och molekylärbiologi; mikrobiologi; Microbiology;

   Sammanfattning : In bacteria, tRNA molecules are produced as precursors with additional nucleotides both upstream and downstream of the tRNA coding sequence. To generate a mature tRNA, the endoribonuclease RNase P removes the upstream sequence, while a number of enzymes can remove the downstream sequence. LÄS MER

4. 3. Endocrine disrupting compounds in effluent waters : Chemical analysis to evaluate exposure of fish

   Författare :Maria Pettersson; Lillemor Asplund; Leif Kronberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi;

   Sammanfattning : The aim of this thesis was to investigate if endocrine disruption related to the release of estrogenic and/or androgenic substances via sewage treatment plant and pulp mill effluents is significant in Swedish waters. Chemical analysis of bile fluid in combination with measurement of biomarkers was used for the evaluation of internal exposure and effects in fish. LÄS MER

5. 4. Blood Flow Regulation and Inflammatory Response in Experimental Models of Diabetes

   Författare :Ulrika Pettersson; Mia Phillipson; Leif Jansson; Johanna Henriksnäs; Mikael Rydén; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Islets; beta-cells; pancreas; inflammation; obesity; adipose tissue; rats; mice; leukocytes; beta3-adrenoceptors; Medical Cell Biology; Medicinsk cellbiologi;

   Sammanfattning : Type 2 diabetes is caused by defect pancreatic islet β-cells together with peripheral insulin resistance. The disease is often accompanied by obesity with associated low-grade visceral adipose tissue inflammation, which contributes to insulin resistance. LÄS MER

7. 5. De som inte kan simma kommer nog att dö! : En studie om barns tankar och känslor rörande klimatförändringarna

   Författare :Anna Pettersson; Leif Östman; Maria Ojala; Danielle van der Burgt; Mattias Sandberg; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; children; climate change; emotions; thoughts; coping; social representations; self-efficacy; barn; klimatförändringar; känslor; tankar; coping; sociala representationer; självtillit; Social and Economic Geography; Kulturgeografi;

   Sammanfattning : This study has investigated the thoughts and the emotions concerning climate change among children. The main purpose of the thesis is to study how the children cope with the threat of climate change and if they see it as something concerning their on lives. LÄS MER