Search for dissertations about: "uptake hydrogenase"

Showing result 1 - 5 of 7 swedish dissertations containing the words uptake hydrogenase.

2. 1. Cyanobacterial Hydrogen Metabolism - Uptake Hydrogenase and Hydrogen Production by Nitrogenase in Filamentous Cyanobacteria

   Author : Pia Lindberg; Peter Lindblad; Kornél Kovács; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Microbiology; cyanobacteria; biohydrogen; Nostoc; hydrogen production; hydrogen evolution; hydrogen metabolism; nitrogenase; hydrogenase; hydrogen; uptake hydrogenase; hupSL; hydrogen uptake mutant; uptake hydrogenase mutant; photobioreactor; hydrogenase accessory genes; hyp; transcription; RT-PCR; NtcA; mass spectrometry; heterocyst; Mikrobiologi; Microbiology; immunology; infectious diseases; Mikrobiologi; immunologi; infektionssjukdomar;

   Abstract : Molecular hydrogen is a potential energy carrier for the future. Nitrogen-fixing cyanobacteria are a group of photosynthetic microorganisms with the inherent ability to produce molecular hydrogen via the enzyme complex nitrogenase. This hydrogen is not released, however, but is recaptured by the bacteria using an uptake hydrogenase. READ MORE

4. 2. The Cyanobacterial Uptake Hydrogenase : Regulation, Maturation and Function

   Author : Marie Holmqvist; Peter Lindblad; Karin Stensjö; Kornél Kovács; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biohydrogen; CalA; Cyanobacteria; Hydrogenase; Maturation; Nostoc punctiforme ATCC 29133; Nostoc sp. PCC 7120; Transcriptional regulation; Molecular biology; Molekylärbiologi; Molecular biology; Molekylärbiologi; Chemistry with specialization in Microbial Chemistry; Kemi med inriktning mot mikrobiell kemi;

   Abstract : With accellerating global warming and pollution problems a change of energy regime is necessary. Solar energy offers a clean and unlimited energy source of enormous potential. Due to it’s intermittenet nature solar energy must be stored - ideally in the chemical bond of a carrier molecule. READ MORE

5. 3. The Biodiversity of Hydrogenases in Frankia : Characterization, regulation and phylogeny

   Author : Melakeselam Leul Zerihun; Anita Sellstedt; Kornel Kovács; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biodiversity; Frankia; immunoblotting; gene expression; uptake hydrogenase; hydrogen-evolving hydrogenase; nickel; phylogeny; Molecular biology; Molekylärbiologi;

   Abstract : All the eighteen Frankia strains isolated from ten different actinorhizal host plants showed uptake hydrogenase activity. The activity of this enzyme is further increased by addition of nickel. Nickel also enhanced the degree of hydrogenase transfer into the membranes of Frankia, indicating the role of this metal in the processing of this enzyme. READ MORE

6. 4. Cyanobacterial Hydrogen Metabolism : Transcriptional Regulation of the Hydrogenases in Filamentous Strains

   Author : Rikard Axelsson; Peter Lindblad; Tomás Ruiz-Argüeso; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; Molekylärbiologi; Molecular biology; Molekylärbiologi;

   Abstract : Cyanobacteria are a heterogeneous group of phototrophic microorganisms. Many cyanobacteria have the capacity to fix atmospheric nitrogen. During the process of nitrogen fixation, molecular hydrogen is produced. Three enzymes are directly involved in hydrogen metabolism in cyanobacteria. READ MORE

7. 5. Hydrogenases in the Cyanobacterium Nostoc sp. Strain PCC 73102

   Author : Fredrik Oxelfelt; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant physiology; Växtfysiologi; Plant physiology; Växtfysiologi; fysiologisk botanik; Physiological Botany;

   Abstract : Many cyanobacteria are capable of fixing atmospheric N2, a reaction that is also producing H2. This hydrogen is often metabolized by an enzyme called hydrogenase. The aim of the present work was to identify and characterize hydrogen metabolism/hydrogenases in the free-living N2-fixing cyanobacterium Nostoc sp.strain PCC 73102. READ MORE