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 15 of 15 for “"photosynthetic pigment"”.
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SOLAR ENERGY HARVESTING WITH PHOTOSYNTHETIC PIGMENT-PROTEIN COMPLEXES
… life on earth. Central to this process are the photosynthetic pigment-protein complexes that transduce sunlight into biologically useful forms of energy through a photochemical charge separation that has a quantum efficiency close to 100%. Integrating these natural pigment-protein complexes in …
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Theory of strong system-bath and electron-light interaction in coupled nanosystems Photosynthetic pigment-protein complexes and coupled quantum dots
… transferieren. Die Antennensysteme bestehen aus Pigmentproteinkomplexen, deren Pigmente hauptsächlich Chlorophyllmoleküle sind. Die Elektronen der verschiedener Chlorophyllmoleküle koppeln an das Bad der Proteinmolekülschwingungen. Außerdem wirkt zwischen den Elektronen der einzelnen …
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Evaluation of physiological and morphological basis for drought resistance in maize and sorghum
… (antioxidant protection mechanisms and photosynthetic pigment compositions) and seed viability and quality response of maize (cv Melkassa-2) and sorghum cv Macia) after exposure to and recovery from pre and post-flowering dehydration in plants grown in a controlled environment growth …
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Aspects of the prevention of light damage during drying and rehydration of the desiccation-tolerant grass Eragrostis nindensis
… fluorescence parameters and levels of photosynthetic pigments (chlorophylls and carotenoids) and of anthocyanins were measured. Electrolyte leakage of drying and rehydrating leaves was monitored to determine the extent of damage to membranes. Quantum efficiency and photosynthetic …
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Ecology of algal mats and their role in the formation of stromatolites in Antarctic dry valley lakes
… in species composition, morphology, biomass, and photosynthetic pigment content of the mats. Algal mats are trapping and binding sediment, and precipitating minerals, particularly calcite. Mats are removing organic and inorganic matter from the arheic lakes via transfer through the icecovers or by …
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Lichens as air pollution assays on the Western Cape coast
… of them was recorded close to the oil refinery. Photosynthetic pigment analyses revealed that Parmelia and Xanthoria are affected differently by pollution. Parmelia showed chlorophyll a and b injury under high pollution conditions while Xanthoria showed high carotenoid injury. The results of this …
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Evaluating multi-satellite chlorophyll-a datasets an ocean colour case study within the Southern Benguela
Chlorophyll-a (chl-a), a photosynthetic pigment that can be derived from satellite ocean colour, is often used as a proxy for phytoplankton biomass and to derive primary productivity. Initiatives such as the Ocean Colour Climate Change Initiative (OC-CCI) produce merged multi-satellite products to …
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Benthic microalgae on the Louisiana inner continental shelf: biomass, distribution, and contribution to benthic food-webs
… Gulf of Mexico are limited. Here we use photosynthetic pigment analysis and microscopic examination of sediment microalgae to investigate how the biomass, composition, and degradation state of sediment-associated microalgae varies along the Louisiana inner shelf across a continuum of …
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Multi-scale Remote Assessment of Phenology of Photosynthesis and Productivity of Northern Forests
Northern trees undergo seasonal regulation of photosynthetic activity in response to environmental conditions. Remote sensing provides a powerful tool to assess photosynthetic phenology at the global scale. However, traditional “greenness” based vegetation indices, like the normalized difference …
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Effects of turbidity on the kelp Ecklonia radiata
… productivity of E. radiata in the Hauraki Gulf. Photosynthetic acclimation to low light was indicated by higher photosynthetic efficiencies and photosynthetic pigment content occurring at low light sites and in low light seasons. Field and mesocosm experiments also indicated that increases in …
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Investigating the physiological and metabolomic effects of Ecklonia maxima-derived biostimulant foliar application in ameliorating the effects of heat shock in tomato plants
… leakage assay, chlorophyll fluorescence and photosynthetic pigment measurements, FRAP (ferric reducing antioxidant power) and DPPH (2,2-diphenyl1-picrylhydrazyl) measurements and lipid peroxidation and proline assays. In addition, changes in the primary metabolites of the treated tomatoes …
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Corticular Photosynthetic Dynamics for a Coastal Evergreen Shrub: Myrica Cerifera
… Variations in % refixation paralleled changes in photosynthetically active radiation (PAR). As light attenuated with increasing branch order % refixation decreased. Increased PAR in the winter due to a more sparse canopy lead to increases in % refixation. Total chlorophyll content and chlorophyll …
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Improving an aqueous two-phase process for C-phycocyanin extraction from Spirulina
… towards this direction. An example of this is in pigments, where many synthetic pigments have been banned or pulled out of the market due to health concerns, while naturally-derived pigments are growing in popularity. The algal pigment, C-phycocyanin (C-PC) is a blue photosynthetic pigment of the …
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Physiological responses of soybean seeds (Glycine Max L. Merr.) to metal pollutants
… Uptake of metal pollutant, concentration of photosynthetic pigments and photosynthetic functioning were examined in metal-germinated, recovery and control seedlings. In the final section of the study, chemical speciation in the nutrient solution used for cultivation of metal-treatment plants …