Global ETD Search
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Showing 1 to 14 of 14 for “"THE REVERSE REACTION"”.
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Kinetics and mechanism of alpha-chymotrypsin catalyzed reactions.
The principle of microscopic reversibility was formulated for elementary reactions at equilibrium. It follows from the principle that for any elementary reaction the favored reaction path in one direction must be the reverse of that in the opposite reaction, and that the ratio of rate constants is …
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ΕΝΔΟΜΟΡΙΑΚΗ ΦΩΤΟΚΥΚΛΟΠΟΙΗΣΗ ΤΗΣ ΚΑΡΒΟΝΗΣ ΠΡΟΣ ΚΑΡΒΟΝΟΚΑΜΦΟΡΑ
THE QUANTUM YIELDS OF THE PHOTOCYCLOADDITION OF CARVONE (I) TO CARVONECAMPHOR (2) (TYPE) HAVE BEEN DETERMINED IN NON POLAR AND POLAR SOLVENTS, UNDER NITROGEN AND IN AIR-EQUILIBRATED SOLUTIONS. QUENCHING BY OXYGEN HAS BEEN OBSERVED ONLY IN NON POLAR SOLVENTS, BENZENE 01 --> 2=0.0025 UNDER NITROGEN …
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DNA supercoiling with a twist
The level of torsion in double-stranded DNA regulates base-pair stability and DNA conformation. It is important in initiation and regulation of specific DNA metabolic processes as well as chromatin assembly. High mobility group proteins (HMGB) are architectural proteins whose HMG DNA binding …
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Synthesis and reactivity of Gold(ΙΙΙ) complexes with pincer ligands
This thesis explores the synthesis, characterisation and reactivity of catalytically relevant gold(III) species supported by pincer ligands. The tridentate diphenylpyridine ligand was found to stabilise monomeric, terminal hydroxides of gold(III) which are reactive synthons for new metal complexes. …
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Photoconductivity studies of the ferrocyanide ion under high pressure
A novel apparatus was developed for the investigation of photoconductivity phenomena in liquids pressurized up to 10 kbar. A variety of exciting light sources could be used. In nonpolar solvents, with an applied d.c. voltage, photo-currents as small as 10 p.a. could be resolved. In aqueous …
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Using the Marcus Inverted Region and Artificial Cofactors to Create a Charge Separated State in <i>De Novo</i> Designed Proteins
<p>To create an efficient de novo photosynthetic protein it is important to create long lived charge separated states. Achieving stable charge separation leads to an increase in the efficiency of the photosynthetic reaction which in turn leads to higher yields of end products, such as biofuels, …
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Biochemistry and genetics of the pathway for the anaerobic degradation of aromatic compounds by Eubacterium oxidoreducens
The biochemical pathway for the anaerobic degradation of gallate, pyrogallol and phloroglucinol by Eubacterium oxidoreducens was investigated. Phloroglucinol reductase was purified 90-fold, from the soluble fraction of cell extract, to electrophoretic homogeneity. The enzyme was an α₂ homodimer …
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In Vitro Methanogenesis From Formaldehyde. Identification of Three Carbon-1 Intermediates of the Methanogenic Pathway
The biosynthesis of CH(,4) from HCHO and by cell-free extracts of Methanobacterium thermoautotrophicum strain (DELTA)H under H(,2) or N(,2) was investigated. Quantitative conversion of HCHO to CH(,4) was achieved under an atmosphere of H(,2) gas. Under a non-reductive atmosphere of N(,2), HCHO …
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Surface Interactions of Diborane
… vapor deposition or epitaxial layer growth. The use of diborane at industrial scales is complicated by the formation of higher-order borane contaminants in pure diborane gas via a complex series of gas-phase reactions. An advanced, rationally designed sorbent could stabilize diborane through …
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Electrocatalysis of oxide-based materials for the oxygen reduction and evolution reactions
… fuel cells and electrolysers, are said to be at the forefront of a renewable energy technology revolution centred on hydrogen as an energy carrier. These devices rely on the chemical reactions of oxygen, namely the oxidation of water to evolve oxygen (oxygen evolution reaction, OER) and hydrogen …
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Development of Novel Chemical Biology Tools for Probing Structure-Function Relationships in G Protein-Coupled Receptors
… questions remain unresolved. For example, the kinetics and thermodynamics of ligand-receptor interactions that lead to receptor activation and how allosteric modulators affect receptor signaling need to be addressed. In addition to basic understanding of transmembrane signaling, studies of …
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Properties of the non-catalytic nucleotide site of the Ca²⁺-ATPase of sarcoplasmic reticulum
Properties of the regulatory nucleotide binding site of the Ca²⁺-ATPase of skeletal muscle sarcoplasmic reticulum have been investigated. Previously, several lines of evidence have indicated the existence of both catalytic and regulatory nucleotide binding sites on the same polypeptide species. The …
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Phosphofructokinases from extremely thermophilic microorganisms
The distribution of phosphofructokinase (PFK) phosphoryl donor subtypes [ATP-, ADP- and pyrophosphate (PPᵢ)] in the deeply rooted phylogenetic lineages of thermophiles is of interest with respect to the evolution of PFK activity and of the Embden-Meyerhof (EM) pathway. To gain additional insight …
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Small molecule mimics of hydrogenase enzymes: synthesis, protonation, and electrocatalysis
… by enzymes called hydrogenases, which catalyze the reduction of protons to dihydrogen, as well as the reverse reaction. The active sites of the two most prevalent hydrogenases contain NiFe or FeFe cores, bound to thiolates, cyanide, and carbon monoxide ligands. These enzymes are also rich in …