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Visar resultat 1 - 5 av 12 avhandlingar som matchar ovanstående sökkriterier.
1. Alkylation and Hydrodearomatization over Zeolite cCatalysts
Sammanfattning : The alkylation of aromatic compounds is widely used in the large-scale synthesis of petrochemicals, and a great variety of fine chemicals and intermediates. Acid catalysts used for alkylation of aromatic hydrocarbons are Brønsted acids containing acidic protons. LÄS MER
2. Alkylation of benzene/ethanol and toluene/methanol over ZSM-5
Sammanfattning : .... LÄS MER
3. Effects of Protons and Small Alcohols on the Oxygen-Evolving Complex of Photosystem II
Sammanfattning : Higher plants and algae use oxygenic photosynthesis to convert solar energy to reducing equivalents and chemical energy. The ultimate electron donor to oxygenic photosynthesis is water. Oxidation of water to oxygen occurs in the oxygen-evolving complex (OEC) in Photosystem II (PSII). The OEC is composed of four Mn atoms, Ca2+ and Cl-. LÄS MER
4. Structural elements involved in protein-mediated proton transfer : Implications from studies of cytochrome c oxidase
Sammanfattning : Proton transfer is one of the most common reactions in biological systems. During energy conversion inside a cell, proton transfer is crucial to maintain an electrochemical proton gradient across the cell membrane. This gradient is in turn used to e.g. LÄS MER
5. Physiological regulation of the high-affinity phosphate uptake system in the yeast Saccharomyces cerevisiae
Sammanfattning : Yeast cells can be found in a wide variety of environments, demonstrating that these cells are capable of adapting to changes in the external milieu. Inorganic phosphate (Pi) is an essential nutrient for all organisms and Saccharomyces cerevisiae cells take up phosphate from the external environment via two different systems, i.e. LÄS MER