Sökning: "Electron donor"

Visar resultat 11 - 15 av 148 avhandlingar innehållade orden Electron donor.

1. 11. Electron transport to nitrogenase in Rhodospirillum rubrum

   Författare :Tomas Edgren; Stefan Nordlund; Patrick Hallenbeck; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rhodospirillum rubrum; nitrogen fixation; electron transport; FixABCX; ferredoxin; Biochemistry; Biokemi;

   Sammanfattning : Biological nitrogen fixation is a key step in the global nitrogen cycle. In this process, dinitrogen in the air is converted to biologically accessible ammonia, which is further assimilated in to the biosphere. LÄS MER

3. 12. Synthesis of Covalently Linked Diporphyrins: Model Compounds for Intramolecular Energy and Electron Transfer

   Författare :Johan Kajanus; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; donor-bridge-acceptor systems; Sonogashira reaction; electron transfer; porphyrin; palladium; model compound; energy transfer;

   Sammanfattning : Three series of donor-bridge-acceptor compounds have been synthesized to probe the influence of various bridge chromophores on energy and electron transfer. The donor-bridge-acceptor compounds in each series comprise two different porphyrins, acting as donor and acceptor, covalently linked by bridge chromophores. LÄS MER

4. 13. 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

5. 14. Porphyrin-Based Donor-Bridge-Acceptor Systems: Intrinsic Excited State Deactivation and Intramolecular Energy/Electron Transfer Reactions

   Författare :Joakim Andreasson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spectroscopy; superexchange; mediation; energy transfer; porphyrins; conformational gating; conformational distortions; electron transfer;

   Sammanfattning : Intramolecular energy and electron transfer reactions have been studied between porphyrin donor and acceptor moieties. The porphyrin units are covalently linked together by one of three different bridging chromophores to constitute the series of D-B-A systems. LÄS MER

7. 15. c Cytochromes as Electron Carriers in Microbial Chlorate Respiration

   Författare :Anna Smedja Bäcklund; Thomas Nilsson; Pia Ädelroth; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; c cytochrome; chlorate reduction; electron transport; Biochemistry; Biokemi; Kemi; Chemistry;

   Sammanfattning : Microbial respiration of oxochlorates is important for the biotreatment of effluents from industries where oxochlorates are produced or handled. Several bacterial species are capable to use perchlorate and/or chlorate as an alternative electron acceptor in absence of oxygen. LÄS MER