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 30 for “"photodamage"”.
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Can non-contact SIAscopy be used in the diagnosis and quantification of pigmentary skin changes associated with photodamage?
… of pigmentary skin changes associated with photodamage? Introduction Non-contact SIAscopy is a new imaging technique where a standard polarised photographic image of the skin is decomposed to produce independent colour, blood and melanin images using SIAscopy (a form of reflectance …
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Light energy management in peach: utilization, photoprotection , photodamage and recovery. Maximizing light absorption in orchard is not always the best solution
… with the excessive incoming energy, therefore photodamage occurs. Each event increasing the photon pressure and/or decreasing the efficiency of the described photo-protective mechanisms (i.e. thermal stress, water and nutritional deficiency) can emphasize the photoinhibition. Likely in nature a …
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The protective effects of the antioxidant combination of ferulic acid with vitamins C and E against UV-induced photodamage in human skin cells
… C and E, to reduce the effect of UVA-induced photodamage in human epidermal (HaCaTs) and dermal skin cells (primary human fibroblasts (HFbs) and murine 3T3 cells). Pretreatment with the FA and vitamins C and E (vEC) combination solution reduced UVAinduced ROS in human fibroblasts while …
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Selenium-induced Enhancement of Hematoporphyrin Derivative Phototoxicity in Murine Bladder Tumor Cells
… form of sodium selenite enhanced Hpd-sensitized photodamage in MBT-2 cells under conditions where the selenite alone was non-toxic. Sodium selenite was found to enhance the fluorescence emission of Hpd and augment the Hpd-sensitized photooxidation of tryptophan. The data indicate that sodium …
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Growth, photophysiology and photosynthesis of two marine diatoms grown under predictable intra-diel light fluctuations
… was instead hypothesised to be caused by greater photodamage and energy investment in photoprotection. Higher NPQ in P. tricornutum reduced net photodamage compared with T. pseudonana. However, light harvesting and ETR in P. tricornutum appeared to be adapted to a lower light environment than T. …
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Potential Impacts of Climate Change on Photochemistry of <i>Zostera Marina</i> L.
… while simultaneously protecting eelgrass from photodamage. Eelgrass were grown in controlled outdoor aquarium tanks at different aqueous CO<sub>2</sub> concentrations ranging from ~50 to ~2100 μM from May 2013 to October 2014, and compared for differences in optical properties and …
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Acclimation of marine macrophytes (Saccharina latissima and Zostera marina) to water flow
… non-photochemical quenching, thus reducing photodamage when photosynthesis was limited by DIC uptake. Water flow also affected root length in Z. marina but root length and below ground biomass were also significantly affected by sediment type, an indirect effect of water flow.
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The Effect of Red Blood Cell Velocity on Oxygenation Measurements using Resonance Raman Spectroscopy
… conditions, there was a significant decrease in photodamage as red cell velocity increased. As blood flowed downstream in arterioles and venules, increased red blood cell velocity was associated with smaller hemoglobin oxygen saturation gradients in vivo.
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Adaptive wavefront correction in two-photon microscopy using Coherence-Gated Wavefront Sensing
… instead of fluorescent light. Thus, neither photodamage nor photobleaching occurs and wavefront distortions can be sensed up to several scattering lengths deep within the specimen. Fast wavefront correction can be realized, allowing the measurement of a wavefront in less than 1 microsecond …
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Methods for optical microscopy beyond conventional limits
… employed confocal microscopy while reducing photodamage and phototoxicity. Measurements of the structures of fluorescent shells with 10 nm precision, derived from conventional wide-field micrographs and a quantitative image analysis routine, are presented and used to study bacterial spore …
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Characterization of the Molecular Mechanisms of Xenobiotic-Induced NRF2 Activation for Disease Prevention and Intervention
… Bixin pre-treatment prevented solar UV-induced photodamage and hair graying in several mouse models. These results suggest that using bixin to activate NRF2 is a feasible strategy to prevent UV-induced skin alterations. On the other hand, prolonged activation of NRF2 has been linked to the …
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Direct Nonlinear Optics Measurements Of Raman Gain In Bulk Glasses And Estimates Of Fiber Performance
… Although the chalcogenides were found to photodamage easily, coefficients 50 - 80 times that of fused silica were measured. Finally, a numerical study was undertaken to predict the theoretical performance and noise properties of tellurite fibers for communications. Included in the computer …
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Nonlinear optical microscopy and spectroscopy by pulse shaping of a coherent fiber supercontinuum
… imaging with deeper penetration and reduced photodamage, and have been established as powerful methods in biomedicine. The most appealing aspect of nonlinear optical imaging is the wealth of molecular contrast derived from various multiphoton processes. Two-photon and three-photon …
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Causes and consequences of patchy spatial distribution in male and female fairy shrimp, Eubranchipus bundyi
… sexes may be responses to predation and/or UV photodamage. The community effects of fairy shrimp distribution, migration, and the different activity levels of the sexes, however, may be dampened because of abundant food resources and habitat disturbance (drying of the pond) truncating a trend …
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Synthesis of Fluorescent Molecules and their Applications as Viscosity Sensors, Metal Ion Indicators, and Near-Infrared Probes
… was incorporated for near-IR emission and reduce photodamage and phototoxicity that is characteristic of common fluorphores that are excited by UV or visible light. A 30-fold enhancement of fluorescence intensity of dU-BZ was achieved in a viscous environment. Values of fluorescence quantum yields …
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Photofrin-Mediated Electroporation-Assisted Photodynamic Therapy of MCF-7 Human Breast Cancer and B16-F10 Mouse Melanoma Cells
… leave most of the patients' tissue prone to photodamage for long periods of time following tumor treatment. In this study, we investigated the effect of augmenting current photodynamic treatment methods with electroporation, a phenomenon involving passing an electric current through cells, …
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Identification of Cathepsin B and L as Novel Uva Targets Upstream of Cutaneous Lysosomal-Autophagic Dysregulation
… unrecognized 'double-hit' mechanism of UVA skin photodamage where primary photo-oxidative insult occurs simultaneously with impaired clearance of damaged molecules and organelles downstream of dual inactivation of cathepsin B and L.
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Luminescent Lanthanide Complexes and Nanoparticles for Biological Applications
… where deeper tissue penetration and reduced photodamage and scattering are desired. Additionally, these studies demonstrated that carbazole effectively sensitized Eu(III) and Tb(III) emission while also providing sensitivity to changes in viscosity and temperature. Triple-decker sandwich …
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Ethnobotany of traditional vegetables used by Sama-Bajau community in Kota Belud, Sabah, and phytochemical and anti-aging investigation of crassocephalum crepidioides
… dermalcell line (HSF1184), which was induced for photodamage using UVB radiation and hydrogen peroxide. Findings revealed that at lower concentration CCE water extracts exhibited no cytotoxicity at lower concentration (≤ 200 μg/ml) on proliferation of tested dermal cells line (HSF1184). Meanwhile …
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Proteomics Assisted Discovery Of Novel Proteins In Assembly And Regulation Of Photosystem II
… Specifically, Psb32 protects PSII from photodamage and accelerates its repair. Thus, we propose that Psb32 plays an important role in minimizing the effect of photoinhibition on PSII. Together, the proteins of the pap operon and Psb32 represent new components in PSII assembly and …
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