Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"CO2 fixation"”.
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Investigating the Role of RAP2.12 and GAPDH in Photosynthetic CO2 Fixation to Improve Drought Tolerance
Manipulation of photosynthetic processes offers an opportunity to increase food production in plants. Current and previous studies have shown that various efforts have been made towards manipulation of photosynthesis to increase crop yield. VBSSM Modelling has been used to identify critical genes …
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Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features
… distribution of the Wood-Ljungdahl pathway for CO2 fixation. 54% of Deltaproteobacteria MAGs encode dissimilatory sulfite reductases (DsrAB), and for those with the ability to reduce sulfate, several dsr genes are related to those from thermophiles. This study expands the genetic catalog of …
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Carbon dioxide fixation and glycogenesis in the flatworm Hymenolepis diminuta
… to be physiologically significant. A third CO2 fixation activity was found in the acetone powder extracts. It appeared to be different from any enzyme yet found and required magnesium ion and coenzyme A for activity. No nucleotide requirement could be demonstrated. Fixation was found to …
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An investigation into the molecular recognition and sensing of anions, especially of alkylcarbamates and related species
… two alkylammonium-alkylcarbamate salts and the CO2 adduct of a cyclic amidine, in an investigation into novel CO2 fixation strategies. Chemical shift changes were used to observe relative binding strengths for interactions between the alkylcarbamate and the receptors in DMSO-d6. The results show …
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Identifizierung und Analyse von Maismutanten mit Defekten im C 4-Zyklus
… (Zea mays) serves to efficiently concentrate CO2 near the enzyme RuBisCo. Therefore the photorespiration, as we can find in C3-plants, is suppressed. Although numerous investigations deal with the regulation of the C4-photosynthesis, a lot of factors which take part in it are unknown. To make …
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Einfluss der Wandtemperatur auf die Stoß-Grenzschicht-Wechselwirkung an einer Rampe im Hyperschall
… (Zea mays) serves to efficiently concentrate CO2 near the enzyme RuBisCo. Therefore the photorespiration, as we can find in C3-plants, is suppressed. Although numerous investigations deal with the regulation of the C4-photosynthesis, a lot of factors which take part in it are unknown. To make …
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Growth and Carboxysome Composition of the Csosia Pore Mutants of <i>Halothiobacillus neapolitanus</i>
… carboxylase/oxygenase (RubisCO) needed for CO2 fixation. The major carboxysome shell proteins, CsoSl A, B, and C, form hexamers which tile together to form the facets of the thin shell. Each hexamer has a small central pore that may play a role in metabolite flux. Using predicted structural …
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Die epigenetische Regulation des C 4 -Syndroms : belichtungsabhängige Chromatinveränderungen am Promotor der Phosphoenolpyruvat Carboxylase aus Mais (Zea mays L.)
… by separating primary and secondary CO2 fixation in two different leaf tissues. The primary fixation step takes place in the mesophyll cytoplasm and is controlled by phosphoenolpyruvate carboxylase (PEPC). The enzyme catalyses the formation of oxaloacetate from bicarbonate and …
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Photoelectrochemical tandem cells with enzymes wired to hierarchically-structured electrodes for solar fuel synthesis
… solar energy drives the conversion of CO2 and H2O into chemical energy carriers and building blocks, releasing O2 as a by-product. Artificial photosynthesis attempts to mimic this process to produce a renewable and storable fuel, such as H2. Semi-artificial photosynthesis combines the …
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Microscopic description of gas permeation and delivery pathways in biological macromolecules
… (O2), nitric oxide (NO), carbon dioxide (CO2) and ammonia (NH3). These chemical species often act as substrates of enzymes and/or as ligands modulating biochemical cascades, so elucidating their delivery and transport is imminent towards understanding cellular functions. Destinated targets …
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Elucidating the bio-electrochemical mechanism of exoelectrogenesis of the cyanobacterium Synechocystis sp. PCC6803
… of exoelectrogenesis being in competition with CO2 fixation in response to immediate levels of inorganic carbon available, and of the putative competing charge transfer process being linked to the availability of the cell to import inorganic carbon. Finally, the mechanism of mediation by …
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Autotrophe CO2-Fixierung in thermophilen Mikroorganismen
… verschiedene Stoffwechselwege zur autotrophen CO2-Fixierung bekannt. Dies sind der Calvin-Zyklus, der reduktive Citrat-Zyklus, der reduktive Acetyl-CoA-Weg und der 3-Hydroxypropionat-Zyklus. Letzterer wurde bisher nur im phototrophen Bakterium Chloroflexus aurantiacus nachgewiesen. <br>In den …
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Studies to influence the carbon metabolism of the C 3 plant Nicotiana tabacum by expressing heterologous enzymes involved in C 4 -like CO 2 fixation
… temperature-dependent inhibition of apparent CO2 assimilation (A) and enhancement of electron requirement for A (e/A ratio) were observed in single PC, and/or double PC/CK or PC/ME overexpressors. A decline in the apparent CO2 compensation point ((), and a short-term inhibition of …
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Novel technologies for microalgae cultivation and subsequent lipid extraction
… mitigate global warming problems since all the CO2 emitted during their burning can be fixed by plants used as biomass feedstock, through photosynthetic mechanisms. On the other hand, first and second generation biofuels are characterized by several drawbacks which can limit their exploitation …