Sökning: "Carbon cycle"

Visar resultat 26 - 30 av 405 avhandlingar innehållade orden Carbon cycle.

1. 26. Adaptations and constraints associated with autotrophy in microbial metabolism

   Författare :Johannes Asplund Samuelsson; Elton P. Hudson; Adil Mardinoglu; Costas D. Maranas; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Autotrophy; Carbon fixation; CO2 fixation; Calvin cycle; CBB cycle; Bacteria; Archaea; Prokaryotes; Cyanobacteria; Synechocystis; E. coli; Comparative genomics; Metabolic engineering; Microbial metabolism; Machine learning; Systems biology; Ribosome profiling; Kinetic modeling; Enzyme kinetics; Metabolic models; Pathway enumeration; Biosynthesis pathways; Metabolomics; Metabolite concentrations; Thermodynamics; Autotrofi; Kolfixering; CO2-fixering; Calvincykeln; CBB-cykeln; Bakterier; Arkéer; Prokaryoter; Cyanobakterier; Synechocystis; E. coli; Jämförande genomik; Metabolisk ingenjörskonst; Mikrobiell metabolism; Maskininlärning; Systembiologi; Ribosomprofilering; Kinetisk modellering; Enzymkinetik; Metaboliska modeller; Syntesvägsuppräkning; Biosyntesvägar; Metabolomik; Metabolitkoncentrationer; Termodynamik; Bioteknologi; Biotechnology;

   Sammanfattning : Carbon dioxide (CO2) emissions from human activities are driving climate change, but the pending crisis could be mitigated by a circular carbon economy where released CO2 is recycled into commodity chemicals. Autotrophic microbes can make a contribution by producing chemicals, such as biofuels, from CO2 and renewable energy. LÄS MER

3. 27. Impact of root and mycorrhizal exudation on soil carbon fluxes : influence of elevated CO2 and metals

   Författare :Emma M. Johansson; Patrick van Hees; Bert Allard; Phil Ineson; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amino acids; 13C; carbon cycle; ectomycorrhiza; elevated CO2; exudation; DOC; LMWOA; metal stress; monosaccharides; oxalate; Pinus sylvestris; saprotrophic fungi; soil respiration; NATURAL SCIENCES; NATURVETENSKAP; Environmental chemistry; Miljökemi; Enviromental Science; Miljövetenskap;

   Sammanfattning : The thesis concerns the behavior of root and ectomycorrhizal (ECM) exudates. In particular, the dynamics of soluble low molecular weight (LMW) organic compounds such as organic acids (LMWOAs), amino acids, monosaccharides, and dissolved organic carbon (DOC) have been studied. LÄS MER

4. 28. Greenhouse Gas Dynamics in Ice-covered Lakes Across Spatial and Temporal Scales

   Författare :Blaize Amber Denfeld; Gesa Weyhenmeyer; Kimberly Wickland; Uppsala universitet; []
   Nyckelord :carbon cycle; climate change; cryosphere; carbon dioxide; methane; lakes; winter limnology; methane oxidation; nutrients; catchment; Limnologi; Limnology;

   Sammanfattning : Lakes play a major role in the global carbon (C) cycle, despite making up a small area of earth’s surface. Lakes receive, transport and process sizable amounts of C, emitting a substantial amount of the greenhouse gases, carbon dioxide (CO2) and methane (CH4), into the atmosphere. LÄS MER

5. 29. Biophysical controls on CO2 evasion from Arctic inland waters

   Författare :Gerard Rocher-Ros; Reiner Giesler; Ryan A. Sponseller; Ann-Kristin Bergström; Paul del Giorgio; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Inland waters; carbon dioxide; organic carbon; inorganic carbon; arctic; CO2 evasion; DOC; DIC; streams; metabolism; oxygen; Limnology; limnologi;

   Sammanfattning : CO2 evasion to the atmosphere from inland waters is a major component of the global carbon (C) cycle. Yet spatial patterns of CO2 evasion and the sources of C that fuel evasion remain poorly understood. LÄS MER

7. 30. Greenhouse gas emission from tropical reservoirs : Spatial and temporal dynamics

   Författare :Annika Linkhorst; Sebastian Sobek; Frédéric Guérin; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; methane; carbon dioxide; climate; carbon cycle; lake; limnology; inland water;

   Sammanfattning : The emission of methane (CH4) and carbon dioxide (CO2) from reservoirs has been estimated to make up for about 1.3% of the global anthropogenic greenhouse gas emission. The impoundment of a river leads to the accumulation of sediment that is brought in from inflowing rivers, and the sediment organic matter is degraded to CH4 and CO2. LÄS MER