Search for dissertations about: "biologiska prover"

Showing result 1 - 5 of 35 swedish dissertations containing the words biologiska prover.

2. 1. Aspects of Porous Graphitic Carbon as Packing Material in Capillary Liquid Chromatography

   Author : Anna Törnkvist; Wolfgang Lindner; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; PGC; porous graphitic carbon; stationary phase; packing material; LC; liquid chromatography; miniaturized; chiral; enantiomer; ESI; electrospray ionization; mass spectrometry; polar compounds; L-DOPA; dopamine; biological samples; biological matrix; Analytisk kemi; PGC; poröst grafitiserat kol; stationärfas; packningsmaterial; LC; vätskekromatografi; miniatyriserade system; kiral; enantiomer; ESI; electrospray jonisation; mass spektrometri; polära föreningar; L-DOPA; dopmamine; biologiska prover; biologisk matris; Analytical chemistry; Analytisk kemi; Analytical Chemistry; Analytisk kemi;

   Abstract : In this thesis, porous graphitic carbon (PGC) has been used as packing material in packed capillary liquid chromatography. The unique chromatographic properties of PGC has been studied in some detail and applied to different analytical challenges using both electrospray ionization-mass spectrometry (ESI-MS) and ultra violet (UV) absorbance detection. READ MORE

4. 2. Ecological effects of pesticides in freshwater model ecosystems

   Author : Lina Wendt-Rasch; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; marine biology; aquatic ecology; limnology; Marinbiologi; Hydrobiology; community; zooplankton; algae; herbicide; insecticide; pesticide mixture; macrophytes; cypermethrin; metsulfuron-methyl; risk assessment; pesticides; microcosms; limnologi; akvatisk ekologi;

   Abstract : In this thesis I have investigated the effects of pesticide exposure on the ecosystem level using various types of experimental ecosystems, i.e. microcosms. The direct effect of exposure to cyperemthrin, a pyretroid insecticide, was a rapid decrease of crustancean zooplankton in enclosures in a lake. READ MORE

5. 3. The Threat to the Baltic Salmon - a Combination of Persistent Pollutants, Parasite and Oxidative Stress

   Author : Maria Persson; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Salmo salar; Atlantic salmon; polychlorinated biphenyls; Animal ecology; akvatisk ekologi; limnologi; Marinbiologi; limnology; aquatic ecology; marine biology; Hydrobiology; Ekologi; Ecology; lake Vänern; lake Vättern; Baltic Sea; Eubothrium crassum; aryl hydrocarbon receptor; AHR; consumption advice; stable isotopes; astaxanthin; EROD; M74; antioxidants; biomagnification; cestodes; parasites; DDT; Djurekologi; Environmental chemistry; Miljökemi; PCB;

   Abstract : Atlantic salmon (Salmo salar) from the Baltic Sea suffer from a reproduction disease known as the M74-syndrome. Newly hatched fry develop nerve disorders and die between 3-5 days after the first symptoms are seen. This is a maternally transmitted disease that is casued by a thiamine (vitamin B1) deficiency. READ MORE

6. 4. Virtual histology by laboratory x-ray phase-contrast tomography

   Author : Jenny Romell; Hans Hertz; Anna Burvall; Julia Herzen; KTH; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biological and Biomedical Physics; Biologisk och biomedicinsk fysik;

   Abstract : Detailed imaging of biological samples is central to different fields of research, as well as for clinical pathology. Classical histology, using light- orelectron microscopy, can generate high-resolution images but is destructive and only gives two-dimensional information. READ MORE

7. 5. Automating STED microscopy for functional and structural live-cell imaging

   Author : Jonatan Alvelid; Ilaria Testa; Eggeling Christian; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; STED; microscopy; nanoscopy; super-resolution microscopy; automation; image analysis; fluorophores; Biologisk fysik; Biological Physics;

   Abstract : Optical microscopy imaging methods are today invaluable tools for studies in life sciences as they allow visualization of biological systems, tissues, cells, and sub-cellular compartments from millimetres down to nanometres. The invention and development of nanoscopy in the past 20 years has pushed fluorescence microscopy down to the nanoscale, reaching beyond the natural diffraction limit of light that does not allow focusing of visible light below sizes of around 200 nm, and into the realm of what was previously only thought possible with electron microscopy. READ MORE