Sökning: "FIA"

Visar resultat 11 - 15 av 16 avhandlingar innehållade ordet FIA.

1. 11. Speciation of trace metals in the Baltic Sea with focus on the Euphotic zone

   Författare :Johan Gelting; Peter Croot; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

   Sammanfattning : Physicochemical speciation of iron (Fe) and the trace metals Cd, Cu, Co, Mn, Ni, and Zn were performed at four different locations in surface waters of the Baltic Sea. Measurements were performed during several months of the growth season at each station to obtain a detailed picture of the temporal variation in relation to phytoplankton growth. LÄS MER

3. 12. New directions in non-porous membrane extraction

   Författare :Eddie Thordarson; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extracting syringe; solvent-free; miniaturisation; micro-porous membrane liquid-liquid extraction; polymeric membrane extraction; Non-porous membrane extraction; supported liquid extraction; integration; automation; Analytical chemistry; Analytisk kemi;

   Sammanfattning : Complex biological and environmental samples require a high degree of selectivity in order to determine components therein. Sensitivity measures, such as analyte pre-concentration are often required for assessing composition quantitatively. LÄS MER

4. 13. Amperometric Carbon Paste Biosensors Based on Horseradish Peroxidase and Oxidases

   Författare :Vijayakumar Rajendran; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; on-line monitoring; l-lactate; glucose; ethanol; Biosensor; Carbon paste; Analytisk kemi;

   Sammanfattning : Amperometric carbon paste peroxide sensors based on horseradish peroxidase (HRP) were developed. In the first approach, HRP was chemically modified with polyethylene glycol to improve the stability of the enzyme in the organic paste matrix and compared with native HRP electrode. LÄS MER

5. 14. Bioelectrochemical Applications of Reactions Catalyzed by Immobilized Enzymes

   Författare :Xiao-Jing Tang; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acetate Kinase.; NAD NADH recycling; Enzyme Electrodes; Enzyme reactors; Enzyme Immobilization; Electrochemical detection; Flow Injection Analysis; Analytical chemistry; Analytisk kemi;

   Sammanfattning : The sensitivity of biosensors can be increased substantially by incorporation in a substrate recycling scheme. Based on the amplification of NAD+/NADH by the recycling reaction catalyzed by glycerol dehydrogenase (GDH) and diaphorase, NAD+/NADH can be determined amperometrically with around 1000 times higher sensitivity than for the substrate sensing mode. LÄS MER

7. 15. DNA vaccines and bacterial DNA in immunity

   Författare :Lisa Charlotta Bandholtz; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :DNA vaccine; CpG DNA; antimicrobial peptides C. pneumoniae; Shigella spp;

   Sammanfattning : This thesis describes DNA-based vaccination and the importance of bacterial DNA in different immunological perspectives. Intranasal (i.n.) DNA vaccination utilizing a plasmid encoding the chlamydial heat shock protein 60 (p-hsp-60) generated lower bacterial burden and reduced pathology in the lungs of mice after subsequent infection with C. LÄS MER