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 137 for “"blue light"”.
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Using blue light for bacterial inactivation
… environmental and clinical bacteria using blue light from light emitting diodes (LEDs). Specific objectives. To investigate the impact of the following on bacterial inactivation using a custom-built LED light module: i) exposure time; ii) sample distance; iii) bacterial concentration; iv) …
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Structural Basis for Signal Transduction in LOV Blue Light Photoreceptors
… the mechanisms of signal transduction within Light-Oxygen-Voltage domains, a subset of the PAS domain family. The first of two projects addressed intradomain signaling from the hydrophobic core to the domain surface. In this study, we addressed the role of a specific conserved residue in …
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Blue light-dependent development of the filamentous fungus Aspergillus nidulans
Zahlreiche Studien belegen, dass in Pilzen Entwicklungsprozesse und die Produktion von Sekundärmetaboliten gekoppelt sind, die molekulare Mechanismen dieses Zusammenhangs sind jedoch bislang unbekannt. Dabei scheint Licht ein Umweltfaktor zu sein, der diese Prozesse bedingt. In dieser Arbeit wurde …
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Biochemical Genetic Analysis of Blue Light Responses in Neurospora Crassa
Physiological responses to blue light are widespread among prokaryotic and eukaryotic organisms. The photoreceptor for some of these responses, long a matter of controversy, may be a flavin or carotenoid. This dissertation applies a biochemical genetic approach to an analysis of the blue light …
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Investigation of phototropin blue light receptor function and signalling in arabidopsis
… on their ability to perceive and respond to light, mainly in two regions of the electromagnetic spectrum. Phytochromes are light sensors for the red and far-red wavelengths of light while cryptochromes, phototropins and members of the ZTL/ADO family respond to blue and UV-A wavelengths of …
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Performance and energy efficiency of low irradiance antimicrobial violet-blue light for environmental decontamination applications
… decontamination technologies which use UV-light or chemicals can be employed to control infection-inducing pathogen spread, but are limited to episodic use in vacant rooms due to safety restrictions. Antimicrobial 405-nm violet-blue visible light has emerged as an alternative technology, …
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Analysis of post-translational modifications of the blue light photoreceptor, phot1, by the CRL3NPH3 ubiquitin ligase complex
… organs toward and roots away from directional blue light. The blue light response can be broken down into three general steps: perception of light, signal leading to the lateral redistribution of auxin, and initiation of a differential growth response (resulting in phototropic curvature). …
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Plant-Like Cryptochrome Does Not Promote Blue Light-Induced Resetting of the Circadian Clock in <i>Chlamydomonas Reinhardtii</i>
… upon environmental time cues such as the daily light/dark and temperature cycles. The unicellular green alga <em>Chlamydomonas reinhardtii</em> is a useful model organism for circadian clock research. It shows several well-characterized circadian rhythms of behavior, and the monitoring of its …
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Nighttime Smartphone Use: Evaluating the effect of reducing blue light emissions from smartphones on sleep onset latency and duration
… pathway being the disruptive effects of blue light upon sleep processes. New software and functional improvements to smartphones in recent years provide the opportunity to better quantify, and potentially limit, the detrimental impact that smartphones may have on sleep. The principal …
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Part I: The synthesis of chenodeoxycholic acid derived macrocyles and cage compounds. Part II. Sonogashira coupling for the synthesis of well-defined π-conjugated arylene ethynylene oligomers as blue-light-emitting materials
… potential organic photovoltaic cells and organic light-emitting diodes (OLEDs). Four series of arylene ethynylene oligomers: mono-terminated di-tert-butyl-substituted OPEs 4a-7a, mono-terminated tert-butyl substituted mono-iodo-substituted OPEs 8-11, unsymmetric phenylene-ethynylene trimers and …
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Studio dei ritmi circadiani in pazienti in stato vegetativo
… (VS) in basal condition and after nocturnal blue light exposure. Methods: Eight patients in VS underwent two experimental sessions of 48 consecutive hours polysomnography with body core temperature (BCT) measurement separated by a 1-week interval. For a week between the two experimental …
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The role of photoreceptors in human skin physiology; potential targets for light-based wound healing treatments. Identification of opsins and cryptochromes and the effect of photobiomodulation on human skin and in cultured primary epidermal keratinocytes and dermal fibroblasts
… mechanisms involved, and no consensus on light parameters. Cytochrome c oxidase (CCO) is established as the main photoreceptor in cells, but light also induces nitric oxide (NO), production of reactive oxygen species (ROS) and activation of ion channels. Emerging new molecular targets …
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A study of the effect of environmental lighting on growth, reproduction and behavior in turkeys (Meleagris gallopavo)
… to determine the effect of environmental lighting on growth, reproduction and behavior in turkeys. During the growth phase a Large White and a Medium White line of turkeys were reared on an intermittent (2L:2D) or a diurnal (12L:l2D) light regimens under white, red (650 nm) or blue (450 …
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Unravelling novel molecular targets for photobiomodulation in human hair follicle towards the development of more effective light-based therapies for hair growth
Light and optical techniques have made a profound impact on modern medicine both in diagnostics and in therapy. Therapeutic action of light is based on photomechanical, photothermal, photochemical and photobiological interactions, depending on the wavelength, power density, exposure time and …
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Regulation of de-etiolation and stomatal opening responses by HYPOSENSITIVE TO LIGHT and HYPERSENSITIVE TO RED AND BLUE 1.
Light is an important environmental cue and regulates plant development processes including de-etiolation, phototropism, shade avoidance, photoperiodic flowering, stomatal movement and so on. In Chapter II, we reported cloning of an Arabidopsis light-signaling component, HYPOSENSITIVE TO LIGHT or …
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Quantum Mechanical/molecular Mechanical Studies of F(1)-Atpase and a Plant Photoreceptor
The plant blue-light receptors of the phot family mediate plant phototropism and contain two light, oxygen, and voltage (LOV) sensitive domains as photoactive elements. We have performed QM/MM simulations of the photocycle of a complete Phot-LOV1 domain from C. reinhardtii. We have investigated the …
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Effects of Screen Light Filtering Software on Sleep and Morning Alertness
Research has shown that blue light can impact the circadian rhythm. Research has also suggested that use of electronic devices, such as computers and televisions that emit blue light before sleep, can negatively impact sleep quality. This research has led to the creation of computer software which …
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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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