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 32 for “"Constant light"”.
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Circadian rhythms in Lhc gene expression in pharbitis nil chois
… in P. nil Lhc gene expression was detected in constant light. This rhythm was initiated or reset to a constant phase by the initial light-on signal received by the plants, and was detectable for at least five days in constant light. The rhythm continued to be detectable for 2 cycles in constant …
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Keeping time on the plant-pathogen arms race : a role for the plant circadian clock in immune response
… tomato (P. syringae DC3000) when infected under constant light and temperature conditions. Wild type plants showed least susceptibility at circadian time (CT) 26 and 50, which correspond to "subjective" morning. Plants were most susceptible when infected at CT42 and CT66, "subjective" night.
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Gender-Specific Differences in Spatial Behavior of the Flesh Fly, <em>Sarcophaga crassipalpis</em>.
… during the photophase but not the scotophase of light-dark cycles, suggesting that visual cues are required for maintenance of inter-individual spacing. No significant differences in male spacing behavior occurred between subjective day and subjective night in either constant dark or constant …
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Die C 4 -spezifische Phosphoenolpyruvatcarboxylase in Zea mays L.: Modellsystem zur Signaintegration auf Chromatinebene in Pflanzen
… of whether promoter activity is regulated by light, nitrogen depletion or sugar availability. Some of these modifications are regulated by modulation of histone acetyltransferase (HAT) activity whereas for others histone deacetylases (HDAC) activity is modulated. In contrast, at the proximal …
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Klonierung und Charakterisierung des PCC1-Gens ('Pathogen and circadian controlled 1')
… the rhythmic expression kept fluctuating under constant light conditions, indicating a circadian clock controlled expression profile. Accordingly, we named the gene PCC1 (Pathogen and Clock Controlled1). In a 35S::CCA1-line, in which many circadian processes are disturbed in constant light …
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Accurate performance measurement of silicon solar cells
… accurate calibration technique using natural sunlight, and a routine measurement technique using a xenon flashlamp. Both techniques are low-cost, yet in combination they achieve very good accuracy. The light source is very important when calibrating solar cells. Commonly used light sources – good …
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Accurate performance measurement of silicon solar cells
… accurate calibration technique using natural sunlight, and a routine measurement technique using a xenon flashlamp. Both techniques are low-cost, yet in combination they achieve very good accuracy. The light source is very important when calibrating solar cells. Commonly used light sources – good …
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Genetic Analysis of Fic-Mediated BiP AMPylation in Photoreceptors
… the Drosophila visual system in response to constant light-induced stress. In response to extended light exposure, flies mutant for fic display loss of synaptic function and disintegration of rhabdomeres, closely stacked plasma membrane microvilli that house the proteins of the …
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The effects of the noradrenaline reuptake inhibitor atomoxetine on circadian rhythms in mice.
… without influence of environmental factors like light). Results have shown that atomoxetine produces a novel resetting of circadian time in mice, producing significant phase delays in animals in constant light and phase advances in animals in constant dark. Atomoxetine also altered the expression …
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Effects of Restricted Spectral Rearing on the Development of Zebrafish Retinal Physiology
<p>Research has shown that rearing in abnormal lighting environments affects both visual behavior and retinal physiology in zebrafish larvae. These studies, however, used only darkness and constant white light as the experimental rearing conditions. The purpose of the present study was to assess …
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Multiplexed photography : single-exposure capture of multiple camera settings
… the quality of photographs taken in challenging lighting environments (e.g. low light or high motion). We first describe the design and implementation of a prototype optical system and associated algorithms to capture four images of a scene in a single exposure, each taken with a different …
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Mechanisms Controlling Day/Night Changes in CAM Tissue Volume, With a Focus on the Kansas Cactus, Opuntia macrorhiza
Day/night changes in organs volume of Crassulacean Acid Metabolism (CAM) plants have been observed. The objective of this study is to determine the most important mechanism that controls day/night changes of organ thickness in CAM plants. In this study, day/night changes in organ volume and morning …
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Mathematical Modeling of Circadian Rhythms in Drosophila melanogaster
… physiology and behavior to the daily cycle of light and temperature imposed by the rotation of the earth. Circadian derives from the Latin word circa "about" and dies "day". Circadian rhythms have three noteworthy properties. They are endogenous, that is, they persist in the absence of external …
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Stomatal acclimation to dynamic light: implications for photosynthesis and water use efficiency
… at global scales. Plant acclimation to growth light environment has been studied extensively; however, the majority of these studies have focused on constant light intensity and photo-acclimation, with few studies exploring the impact of dynamic growth light on stomatal acclimation and …
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Quantitative characterisation of single-cell circadian rhythms in cyanobacteria Synechococcus elongatus
… on Earth is affected by periodic fluctuations in light caused by our planet’s rotation. Circadian (24-h) rhythms enable living systems to adapt to environmental cycles and anticipate the changes in their surroundings. To perform their functions, the clocks must be sensitive to the entraining cues …
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Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables
… supply) at 10 °C and 15 °C for 6 days under constant light (39.2 ± 0.43 μmol photons m⁻² s⁻¹) on a 16:8 hours light:dark photoperiod. Natural grazing (using Tricolia capensis Dunker) and artificial grazing (stimulated by scissors) was performed to determine their effects on the chemical …
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Histone modifications and the Arabidopsis thaliana circadian clock
… are circadianly regulated have been shown to be light responsive or involved in light responses. Rhythmic histone acetylation has been demonstrated in the promoter of TIMING OF CAB EXPRESSION1 (TOC1). Here, I used semi-quantitative Reverse Transcriptase Polymerase Chain Reaction …
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Optimizing in-vitro production of Delaware-isolated Pythium zoospores
… crop losses by causing damping off, seedling blights, root rots, foliar blights, or stalk rots across hundreds of plant species. Pythium propagates in various ecological niches by producing oospores, sporangia, and mycelial hyphae. However, infections on host tissue are primarily initiated by …
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Quantification of Aggregate Formation in Prochlorococcus
… Nine diverse strains from two clades, low-light IV (LLIV) and high-light II (HLII), were cultured for this study in order to compare the phenotype between and within ecotypes. The aggregate formation was tracked via hourly time-lapse imaging of Prochlorococcus grown under constant light …
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