Search for dissertations about: "Metalloenzymes"

Showing result 11 - 15 of 16 swedish dissertations containing the word Metalloenzymes.

2. 11. Catalysts for Oxygen Production and Utilization : Closing the Oxygen Cycle: From Biomimetic Oxidation to Artificial Photosynthesis

   Author : Erik Karlsson; Jan-Erling Bäckvall; Björn Åkermark; Jerker Mårtensson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; oxygen; catalytic oxidation; biomimetic oxidation; artificial photosynthesis; water oxidation; DFT calculations; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

   Abstract : This thesis describes the development and study of catalysts for redox reactions, which either utilize oxygen or hydrogen peroxide for the purpose of selectively oxidizing organic substrates, or produce oxygen as the necessary byproduct in the production of hydrogen by artificial photosynthesis.The first chapter gives a general introduction about the use of environmentally friendly oxidants in the field of organic synthesis, and about the field of artificial photosynthesis. READ MORE

4. 12. Synthetic [FeFe] Hydrogenase Active Site Model Complexes

   Author : Lennart Schwartz; Sascha Ott; Marcetta Y. Darensbourg; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; hydrogenase mimic; proton reduction; bioinorganic chemistry; diiron hexacarbonyl complexes; artifical photosynthesis; hydrogen; Organic chemistry; Organisk kemi;

   Abstract : [FeFe]-Hydrogenases (H2ases) are metalloenzymes that can catalyze the reversible reduction of protons to molecular hydrogen as part of the metabolism of certain cyanobacteria and green algae. Due to the low availability of the enzyme, synthetic complexes that mimic the natural active site in structure, function and activity are highly sought after. READ MORE

5. 13. The birth of the hydrogenase : Studying the mechanism of [FeFe] hydrogenase maturation

   Author : Brigitta Németh; Gustav Berggren; Ann Magnuson; Mohamed Atta; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; HydF; HydA; [FeFe] hydrogenase maturation; semi-synthetic enzymes; Biokemi; Biochemistry;

   Abstract : The [FeFe] hydrogenases are ancient metalloenzymes that catalyse the reversible interconversion between protons, electrons and molecular hydrogen. Despite the large structural variability within the [FeFe] hydrogenase family, the active site, the so called “H-cluster” is present in every representative. READ MORE

6. 14. Medium chain dehydrogenases/reductases : alcohol dehydrogenases of novel types

   Author : Annika Norin; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Alcohol dehydrogenase; Nicotinoproteins; Structural interpretations; Functional properties; Molecular evolution.;

   Abstract : The medium chain dehydrogenase/reductase (MDR) superfamily is separated into at least eight families, of which the dimeric alcohol dehydrogenase (ADH) is one. Including species variants, close to 1000 MDR forms have been characterized. READ MORE

7. 15. Structural and mechanistic aspects of alcohol dehydrogenase function

   Author : Stefan Svensson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Vertebrates possess a complex alcohol dehydrogenase (ADH) system composed of multiple molecular forms, which are currently classified into seven classes according to their structural properties. ADHs are dimeric zinc metalloenzymes that catalyze the reversible oxidation of alcohols to aldehydes/ketones using NAD+/NADH as electron acceptor and donor, respectively. READ MORE