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 11 of 11 for “"light adaptation"”.
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Genetic diversity and its consequences for light adaptation in Prochlorococcus
… possess over 40 copies of genes encoding high light inducible proteins (HLIPs), compared to only 9-24 in the other Prochlorococcus genomes. Other studies suggest these genes may be involved in resistance to sudden increases in light intensity, among other stresses. This becomes especially …
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Nighttime Driving Evaluation of Disability and Discomfort Glare from Various Headlamps under Low and High Light Adaptation Levels
… more dangerous task than driving during the daylight hours. Driving is primarily a visual task, and there are certain situations at night in which vision and safety may be compromised. The effects of glare produced by the headlamps of oncoming vehicles have become an interesting problem to many …
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In vivo studies of metabolism and visual phototransduction of the isolated toad retina by phosphorus-31 nuclear magnetic resonance spectroscopy
… to see if these change with light adaptation (Chapter 5) and if cGMP could be observed in vivo (Chapter 6).
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Carbachol-Induced Pigment Granule Dispersion
… photoreceptors. In teleosts, the RPE aids in light adaptation through pigment granule movements. In the bright light, pigment granules are dispersed into the long apical processes thereby shielding rods from excessive light. The opposite occurs in dark conditions; pigment granules are …
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Effect of Melatonin and Dopamine in Site Specific Phosphorylation of Phosducin in Intact Retina
… of the retina and pineal gland. In the retina, light-dependent changes in cAMP and Ca2+ control the phosphorylation of Pdc at serine 73 and 54, respectively, which in turn controls the binding of Pdc to G protein beta gamma subunit dimer . G protein beta gamma subunit dimer binding has been …
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Mechanism of activation of photoreceptor phosphodiesterase by transducin and by low molecular weight proteins
… cGMP and gamma binding to PDE may play a role in light adaptation of rod photoreceptor cells.</p><p>The delta protein is hypothesized to regulate adaptation of rod photoreceptor cells by delta binding to the prenyl groups on PDE and releasing PDE from the disk membrane and thereby preventing …
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Application of Machine Learning Algorithms for Elucidation of Biological Networks from Time Series Gene Expression Data
… directional growth patterns. Furthermore, light perception, particularly the nuances of the red and far-red spectrum, combined with structural cell changes orchestrated by xyloglucan, are shown to be cardinal players in heliotropism's intricate dance.</p> <p>Chapter 3 embarks on a journey …
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S-nitrosylation mediates synaptic plasticity in the retina
… visual system must accommodate intensities of light that can change by a factor of 10¹⁰. In order to do so, the retina adapts to large, daily changes in natural light intensity by shifting its dynamic range of coding. For example, as morning light intensity increases, the retina implements …
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Signaling Mechanisms That Control Gap Junctional Coupling Between Retinal Neurons
… rod circuit, is a hallmark of retinal luminance adaptation. However, very little is known about the mechanisms regulating dynamic modulation of Cx36-mediated coupling. The primary goal of this work was to understand how cellular signaling mechanisms regulate coupling through Cx36 gap junctions. …
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Molecular Evolution and Functional Characterization of the Visual Pigment Proteins of the Great Bowerbird (Chlamydera nuchalis) and Other Vertebrates
Visual pigments are light sensitive receptors in the eye that form the basis of sensory visual transduction. This thesis presents three studies that explore visual pigment proteins in vertebrates using a number of computational and experimental methods in an evolutionary framework. The objective is …
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Peripher induzierte Pulsation eines fovealen Nachbildes: Nachweis eines weitreichenden neuronalen Effektes
… das zeigt, dass induzierte Änderungen des Adaptationszustandes fovealer Zellen die hier beobachtete Nachbildpulsation tatsächlich erklären können.