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 20 of 29 for “"glycolate"”.
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Molecular and biochemical analyses of transgenic nicotiana tabacum plants metabolizing glycolate in the chloroplasts
… biochemical pathway for the metabolism of glycolate was established in the chloroplasts of tobacco (Nicotiana tabacum) plants. The new pathway aims at increasing the refixation of CO2 inside the chloroplasts and thereby at suppressing photorespiration in C3 plants. The pathway is derived …
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Construction and molecular analysis of genetically modified C 3 plants expressing a glycolate oxidizing pathway inside the chloroplast
Metabolism of glycolate via the photorespiratory pathway in C3 plants consumes not only ATP and reducing equivalents but results also in approximately 25% loss of the carbon from glycolate. In the present study, a novel biochemical pathway for the metabolism of glycolate was established in the …
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Synthesis of Resveratrol and Its Analogs, Phase-Transfer Catalyzed Asymmetric Glycolate Aldol Reaction, and Total Synthesis of 8,9-Methylamido-Geldanamycin
… catalysts (PTC) were developed for glycolate aldol reactions to give differentially protected 1,2-diol products. Silyl enol ether of diphenylmethoxy-2,5-dimethoxyacetophenone reacted to generate benzhydryl-protected products. O-Allyl trifluorobenzyl cinchonium hydrodifluoride (20 mol …
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Photorespiration in Arabidopsis thaliana : natürliche Evolution und gentechnologische Modifikation
… leads to the formation of the toxic compound glycolate. Glycolate cannot be used by the plant and has to be recycled by the energy consuming photorespiratory pathway. The first step of photorespiration is the oxidation of glycolate to glyoxylate. Land plants and charophycean green algae …
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Studies in Asymmetric Catalysis: Lewis Base Catalyzed, Enantioselective Addition of Trimethylsilyl Cyanide, Trimethylsilyltrifluoromethane, and Glycolate-Derived Silyl Ketene Acetals to Aldehydes
… catalyst is effective for the addition of glycolate-derived silyl ketene acetals to aldehydes. The sense of diastereoselectivty could be modulated by changing the size of the substituents on the silyl ketene acetals. In general, the trimethylsilyl ketene acetals derived from methyl …
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ANALYSIS OF ANIONS AND PROTEINS RELATED TO OXALATE METABOLISM IN HUMAN ERYTHROCYTES
… their co-elution. Erythrocyte incubations with glycolate, glyoxylate, and C-13 glycolate were used to study whether these acids were precursors of oxalate or phosphoglycolate. This study also assessed a more costeffective and less-invasive diagnostic assay called Dried Blood Spot Filter Paper …
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Bacterial community composition in stream biofilms is influenced by algal response to varying light and phosphorus ratios
… bacterial portion of the microbial community. Glycolate is an algal-specific exudate produced under excess light conditions. Glycolate uptake by bacteria has been shown to correlate with algal primary productivity. Bacterial populations that utilize glycolate possess the gene, glycolate oxidase …
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A novel approach for the suppression of photorespiration in C 3 plants by gene transfer
… pathway is derived from E. coli and converts the glycolate formed during photorespiration into glycerate. Three enzymatic activities are required: Glycolate dehydrogenase (GDH), Glyoxylate carboligase (GCL), and Tratronic semialdehyde reductase (TSR). In order to establish the pathway in the …
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Bioabbaubare Polymernetzwerke mit Formgedächtniseffekt als Matrix für Wirkstofffreisetzungssysteme
… network based on oligo[(e-hydroxycaproate)-co-glycolate]dimethacrylates and butylacrylate with a semi-crystalline switching segment is used for the systematic investigation of the influence of the polymer matrix on drug release. A direct comparison with copoly(esterurethane)networks of …
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Investigating exudate- and habitat-mediated effects of phytoplankton on lake bacterial community dynamics
… to use the photorespiration-specific exudate glycolate. Diversity and dynamics of glycolate-utilizing bacteria were characterized in six lakes using functional gene glycolate oxidase subunit D (glcD). Freshwater glycolate-utilizing populations exhibited a range of taxonomic diversity and …
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Total Syntheses of (+)-Geldanamycin, (-)-Ragaglitazar, and (+)-Kurasoin A and Phase-Transfer-Catalyzed Asymmetric Alkylation
… of GA and future synthetic analogs. Asymmetric glycolate alkylation has been developed using phase-transfer-catalysis (PTC). Diphenylmethoxy-2,5-dimethoxyacetophenone with trifluorobenzyl cinchonidinium catalyst and cesium hydroxide provided alkylation products at —35 °C in high yield (80-99%) …
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Defining the role of 4-hydroxy-2-oxoglutarate aldolase in hydroxyproline metabolism and primary hyperoxaluria
… and dietary sources, leads to an increase in glycolate and oxalate levels in plasma and urine. Furthermore, it has been shown that Hyp metabolism is likely the major contributor to the glyoxylate pool which can then go on to form oxalate in PH patients. Therefore, inhibition of Hyp degradation …
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Studies of the effects of various lithogenic and antilithogenic dietry supplements on calcium oxalate kidney stone risk factors in South African black and white subjects
… taurine, which has been shown to reduce urinary glycolate and oxalate in animal models, was also selected for investigation in the two population groups. In all studies, similar protocols were adopted. These were approved by the Research and Ethics Committee of the University of Cape Town.
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Palladium-Imidazolium Carbene Catalyzed Heck Coupling Reactions and Synthesis of a Novel Class of Fluoroanthracenylmethyl PTC Catalysts
… were synthesized and explored for asymmetric glycolate and glycine alkylation. Phosphorous pentoxide was used for the challenging electron-deficient electrophilic aromatic substitution step. These new catalysts proved to have high selectivities for glycine alkylation under mild conditions.</p>
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Exploring co-milling as a strategy to improve the dissolution of poorly water-soluble drugs
… excipients: croscarmellose sodium, sodium starch glycolate, and crospovidone. All 39 co-milled formulations showed increased intrinsic dissolution rates (IDR), with molecular descriptors such as polar surface area and size correlating positively with enhancement. Excipient performance varied with …
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Amorphe bioabbaubare Poly(esterurethan)netzwerksysteme mit Formgedächtniseigenschaften
… domains consisting of oligo[(rac-lactate)-co-glycolate]segments serving as switching segments. The additional phase is formed by oligo(propylene glycol) or poly(acrylate)segments. Tailoring the mechanical properties of the materials below Ttrans can be achieved by variation of the …
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Synthesis, study and application of silyl ketene imines in Lewis base catalyzed carbonyl addition
… allow for the preparation of cross-benzoin and glycolate-aldol products in high yield and with exceptional diastereo- and enantioselectivities.
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Genome-scale metabolic modelling of Salmonella and Lactobacillus species
… that interactions, involving the transfer of glycolate from L. plantarum to S. Typhimurium, that favour growth of S. Typhimurium, are possible, by unlikely to occur in vivo. Data from Phenotype Microarray (PM), as well as DNA microarray data obtained during infection of cultured macrophage …
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Genome scale metabolic modelling of Phaeodactylum tricornutum
… pathway, threonine metabolism, recycling of glycolate and HCO3 fixation. Based on the model analysis, experiments were designed where cultures were exposed to high light, supplemented with HCO3 , under phototrophic and mixotrophic conditions. This resulted to an increase in biomass and lipid …
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On the Effectiveness and Challenges of Electrosynthesis Strategies in Escherichia coli
… glucose as a feedstock was examined. The maximum glycolate titres for the best performing conditions reached 10.6 g/L. The highest substrate uptake rate for ethylene glycol was determined to be ca. 5 mmol/gDW-h.
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