Sökning: "Syre"

Visar resultat 16 - 20 av 255 avhandlingar innehållade ordet Syre.

1. 16. Metastable orthorhombic Ta3N5 thin films grown by magnetron sputter epitaxy

   Författare :Jui-Che Chang; Ching-Lien Hsiao; Jens Birch; Grzegorz Greczynski; Denis Music; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The semiconductor tritantalum pentanitride (Ta3N5) is a promising green-energy material for photoelectrolyzing water to produce oxygen and hydrogen owing to its proper bandgap of 2.0 ± 0.2 eV and band positions to redox potential of water. LÄS MER

3. 17. Transcriptional Regulation of HIF2A/EPAS1 in Neuroblastoma

   Författare :Arash Hamidian; Avdelningen för translationell cancerforskning; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; HIF-2α; enChIP; ESRRA; mTORC2; IGF-II; Hypoxia; Cancer; PI3K; Transcription; Neuroblastoma;

   Sammanfattning : Neuroblastoma is a childhood tumor of the developing sympathetic nervous system (SNS) and is the most commonly diagnosed form of cancer in children before one year of age. Although survival curves have improved for these patients during the past decades, the conventional regimen of neuroblastoma treatment has clearly reached a plateau of efficiency with regard to increasing the survival rates of high-risk children. LÄS MER

4. 18. Ocean chemistry and the evolution of multicellularity

   Författare :Emma U. Hammarlund; Stefan Bengtson; Donald Canfield; Nils Holm; Graham Budd; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geochemistry; biology; paleontology; evolution; multicellularity; geokemi; Geochemistry;

   Sammanfattning : Oxygen has been assumed to be a vital trigger for the evolution of multicellular life forms on Earth, partly based on its power to promote substantial energy flux in cell respiration and partly as biosynthesis of compounds like collagen require oxygen. However, the co-evolution of large life and the Earth’s chemical environment is not well understood at present, and there is particular disagreement in the field about whether the Cambrian explosion of animal life forms was a chemical or biological event. LÄS MER

5. 19. Structure, Dynamics and Thermodynamics of Liquid Water : Insights from Molecular Simulations

   Författare :Kjartan Thor Wikfeldt; Lars G. M. Pettersson; Francesco Sciortino; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Liquid water; supercooled water; diffraction; structure modeling; molecular dynamics; x-ray spectroscopy; EXAFS; SAXS; Physics; Fysik; Theoretical Physics; teoretisk fysik;

   Sammanfattning : Water is a complex liquid with many unusual properties. Our understanding of its physical, chemical and biological properties is greatly advanced after a century of dedicated research but there are still many unresolved questions. LÄS MER

7. 20. Bacterial Terminal Oxidases. Studies in Bacillus subtilis

   Författare :Lena Winstedt; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mycology; virology; mykologi; bakteriologi; Mikrobiologi; bacteriology; Microbiology; di-copper center; cytochrome oxidase; Enterococcus faecalis; cytochrome bd; Bacillus subtilis; terminal oxidase; virologi;

   Sammanfattning : The final step in aerobic respiratory pathways is catalyzed by terminal oxidases. Bacteria generally have two or more terminal oxidases. Aerobically grown Bacillus subtilis synthesize three terminal oxidases: one cytochrome c oxidase, cytochrome caa3 and two quinol oxidases, cytochrome aa3 and cytochrome bd. LÄS MER