Sökning: "oxygen transport"

Visar resultat 21 - 25 av 308 avhandlingar innehållade orden oxygen transport.

1. 21. Enzymes and electron transport in microbial chlorate respiration

   Författare :Jan Bohlin; Thomas Nilsson; Lars-Gunnar Franzén; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ideonella dechloratans; c cytochromes; chlorate; chlorate reductase; chlorite dismutase; heterologous expression; heme reconstitution; electron transport; oxidoreductas; Chemistry; Kemi; Kemi; Chemistry;

   Sammanfattning : Microbial chlorate respiration plays an important role in the turnover of oxochlorates in nature and industrial waste management. This thesis deals with the characterization of the molecular components of chlorate respiration in Ideonella dechloratans. LÄS MER

3. 22. Alternative methods for analysing moisture transport in buildings : Utilisation of tracer gas and natural stable isotopes

   Författare :Kjartan Gudmundsson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tracer gas; water vapour permeability; diffusion; surface diffusion; isotopic analysis; deuterium; oxygen-18; fractionation; vapour barrier; transient numerical modelling of diffusion; Building engineering; Byggnadsteknik;

   Sammanfattning : New methods, based on tracer gas measurements and isotopicanalysis can be used to evaluate the moisture properties ofbuilding materials and provide the means for forensic analysisof the origins and history of excessive water in buildings, theimmediate practical consequences of which will be the abilityto improve the moisture performance of constructions. It is shown, in theory and through measurements how thewater vapour permeability of porous building materials can witha good degree of accuracy be estimated with tracer gasmeasurements that provide an efficient alternative to the cupmethod. LÄS MER

4. 23. Studies of transport in oxides on Zr-based materials

   Författare :Clara Anghel; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zirconium; hydrogen; oxygen diffusion; second-phase particle; oxidation; dissociation; hydration; carbon monoxide; adsorption; porosity; Other materials science; Övrig teknisk materialvetenskap;

   Sammanfattning : Zr-based materials have found their main application in the nuclear field having high corrosion resistance and low neutron absorption cross-section. The oxide layer that is formed on the surface of these alloys is meant to be the barrier between the metal and the corrosive environment. LÄS MER

5. 24. Transport by Benthic Macrofauna: Functional Classification and Biogeochemical Response

   Författare :Stina Lindqvist; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Marine sediments; Early diagenesis; Bioturbation; Functional groups; Benthic fluxes; Imaging; Ecosystem function; Sediment reworking; Transport proxies; Fluorescent particles;

   Sammanfattning : Burrowing and reworking activities by benthic macrofauna regulate rates and pathways during organic matter mineralisation in bioturbated sediments. In so doing, they also affect the overall cycling of elements crucial in the biosphere (e.g. C, N, P, Fe, Mn and S). LÄS MER

7. 25. The Role of Mitochondrial Uncoupling in the Development of Diabetic Nephropathy

   Författare :Malou Friederich Persson; Fredrik Palm; Richard K. Porter; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Kidney; mitochondria; Uncoupling Protein-2; Adenosine Nucleotide Transporter; uncoupling; diabetes; diabetic nephropathy; db db; dinitrophenol; Coenzyme Q10; oxygen; rats; mice; Physiology; Fysiologi; Medical Cell Biology; Medicinsk cellbiologi;

   Sammanfattning : Diabetes is closely associated with increased oxidative stress, especially originating from the mitochondria. A mechanism to reduce increased mitochondria superoxide production is to reduce the mitochondria membrane potential by releasing protons across the mitochondria membrane. LÄS MER