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 141 for “"UV radiation"”.
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X and UV radiation from accreting non-magnetic degenerate dwarfs
"X radiation from degenerate stars is produced by the impact of accreting matter with the stellar surface. The resulting X-ray and UV spectrum gives vital clues about the nature of the underlying star and the extreme conditions of temperature and magnetic field strength that may exist in the …
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Defect production in alkali halide crystals by monochromatic x and UV radiation
… reactions of this impurity induced by irradiation into its ultraviolet absorption band were studied and luminescent emission from one of the hydroxyl dissociation products was observed for the first time.
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The impact of UV radiation on the health and pathogen development of the Pacific oyster (Crassostrea gigas)
… of the genus Vibrio such as V. aestuarianus. UV radiation (UVR) is an intertidal stressor which functions as an ecosystem regulator. UVR has disinfectant properties with the energetic potential to damage nucleic acids of microbes inhabiting surface waters. UVR can also have both positive and …
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INVESTIGATION OF NEW THERAPEUTIC TARGETS OF RESPIRATORY VIRUSES: A NOVEL METHOD EXPLOITING UV RADIATION ¿ PROOF OF CONCEPT BASED ON SARS-COV-2 ¿
… the inhibitory effects of ultraviolet (UV) radiation that reaches the Earth's surface (UV-B, and UV-A) on SARS-CoV-2 to better characterize seasonal viral spread. Subsequently, UV-C radiation was exploited in an in vitro infection assay to develop an unbiased/multidisciplinary roadmap …
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X and UV radiation from accreting non-magnetic degenerate dwarfs: A two-fluid treatment of the emission region and the effects of steady nuclear burning
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-16T16:21:56Z No. of bitstreams: 1 1981_weast.pdf: 3157656 bytes, checksum: c43d64a0b86da434a1750cf61a63b211 (MD5)
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Jednoduchý elektrochemický DNA biosenzor pro detekci poškození DNA způsobeného UV zářením
Ultraviolet (UV) radiation is a common DNA damaging agent. Major DNA lesions, such as cyclobutane pyrimidine dimers (CPDs) and pyrimidine-(6-4)-pyrimidone (6-4PPs) photoproducts, are carcinogenic and mutagenic. UV induced DNA damage was investigated using a simple electrochemical DNA biosensor …
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Regulation of BubR1 by Ultraviolet Radiation: Implications in Skin Cancer
… of NMSC is prolonged exposure to ultraviolet (UV) radiation. UV radiation acts as both the tumor initiator and tumor promoter by causing molecular and cellular stress and DNA damage in cells within the skin, leading to mutations that promote the development of skin cancer. BubR1 is an essential …
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Development of a Ground Based Atomic Oxygen and Vacuum Ultraviolet Radiation Simulation Apparatus
… include Atomic Oxygen, AO, and Ultraviolet, UV, radiation. UV radiation becomes more severe in space as there is no atmosphere to attenuate incoming photons, thereby exposing spacecraft to radiation that never reaches the surface of the Earth. Overall, space vehicles are exposed to a total of …
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Analyzing a calcium-dependent UV response that results in a global chromatin compaction in mammalian cells
… change in the global chromatin in response to UV radiation and the etiology of these changes are not well known. To visualize a global chromatin structural changes upon UVB radiation, we used a fluorometric detection approach. We observed large-scale chromatin compaction immediately after UVB …
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Effects of far ultra-violet radiation and oxygen on macromolecular synthesis and protein induction in Bacteroides fragilis Bf-2
… thesis deals with a study of the effects of far-UV radiation, oxygen and hydrogen peroxide on macromolecular synthesis and viability in the obligate anaerobe, Bacteroides fragilis, as well as the specific proteins induced in this organism by these different DNA damaging agents.
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Residual restoration of DNA lesions in Deinococcus radiodurans mutants indicate presence of a bypass UV-repair process
The differing UV-susceptibility and UV-damage repair capability of the Deinococcus radiodurans strains and the hypothesis of a bypass repair system have been investigated. The results obtained provide evidence that UV radiation engenders synergistic effects in combination with other stressors like …
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The Tumor Suppressor PKCδ Is Critical for UV-Induced G2/M Checkpoint Activation and Apoptosis
… Following DNA damage, such as exposure to UV radiation, PKCδ is cleaved in a caspase-dependent manner, generating a constitutively active catalytic fragment (PKCδ-cat) which is necessary and sufficient for keratinocyte (KC) apoptosis. We found that in addition to inducing apoptosis, …
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Changes in the Distribution of "Acris crepitans blanchardi", with Studies of Nesting Microhabitat and the Possible Impact of Ultraviolet-B Radiation
… extreme. The possible impact of ultraviolet (UV) radiation was tested on six species of amphibian eggs as a possible cause for this decline. These included "Acris crepitans", "Ambystoma", "Bufo americanus", "Hyla versicolor complex", "Pseudacris triseriata", and "Rana pipiens". The eggs were …
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Impact of Artificial UV Light Sources on the Skin
UV radiation has the ability to cause erythema, photoaging and photo-cancer. In 2010 Westminster wanted information on sources of artificial UV radiation in particular sunbeds. The objective of this study was to measure the spectral outputs from artifcial tanning units throughout England and to …
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Ultrastructural characterization of ultraviolet induced corneal disease : an animal model
… nineteenth century the importance of ultraviolet radiation was being realized. Danish physician Niels Finsen, whom many regard as the father of ultraviolet phototherapy, also stressed that it was ultraviolet radiation in the solar spectrum which cause sunburn. We now recognize that the small …
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Selenotrisulfide Derivative Of Alpha-lipoic Acid: Evaluation In A Cell Culture Model For Potential Use As A Topical Antioxidant
… Exogenous sources of oxidative stress, such as UV radiation, are capable of generating reactive oxygen species (ROS). Elevated levels of ROS can lead to covalent modifications of lipids, nucleic acids, and proteins within a cell. This damage has been implicated in the development of cancer and …
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