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 12 of 12 for “"UVB radiation"”.
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UVB radiation; a specific regulator of the growth and development of Arabidopsis thaliana
Research into the impacts of UVB radiation on plants and ecosystems began in the 1970’s in answer to concerns about the degradation of the stratospheric ozone layer. Early research focused solely on UVB as an agent of plant stress but recently the thinking surrounding UVB has undergone a paradigm …
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Effects of arsenic and UVB radiation on induction of cyclin D1 in human keratinocytes.
Arsenic and Ultraviolet radiation B (UVB) are environmental toxins that have been linked to various epithelial cancers. Arsenic metabolism in humans leads to its collection in the skin, where it encounters and can act with known carcinogen UVB. Epidemiological evidence of the two toxins …
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Investigating the interactive effects of ultraviolet-B radiation and pesticides in amphibians
… proposed, including pesticide contamination and UVB radiation. However, amphibian declines are likely caused by a combination of these factors. For two of these stressors that co-occur in aquatic habitats, little is known about the interactive effects of pesticides and UVB radiation in …
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Stratospheric ozone depletion and plant-insect interactions: Effects of UVB radiation of generalist and specialist herbivores on a tropical tree and a temperate forb
I investigated effects of UVB radiation on plant-insect interactions using two plant-herbivore systems.
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Evaluating the clinical and physiological effects of long term ultraviolet B radiation on guinea pigs (Cavia porcellus) and rabbits (Oryctolagus cuniculus)
… through their diet, exposure to ultraviolet B (UVB) radiation and subsequent photobiochemical synthesis, or a combination thereof. The objectives for this research were to evaluate the clinical and physiologic effects of artificial UVB light supplementation on rabbits (Oryctolagus cuniculus) and …
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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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The influence of ultraviolet-B radiation on benthic communities in Rocky Mountain streams with different metal exposure histories
… that increase exposure of benthic communities to UVB (280 to 320 nm) provide an opportunity to examine how UVB interacts with metals contamination to structure benthic communities. I integrated a series of UVB addition experiments conducted in stream microcosms with a large-scale UVB removal …
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Intravital Imaging of Dynamic Behaviors of Leukocytes in UVB-induced Skin Inflammation
Ultraviolet B (UVB) irradiation diminishes surface densities of Langerhans cells (LCs) in the epidermis of the skin. Other leukocytes, such as neutrophils and macrophages, are recruited to the irradiated sites due to chemo-attracting factors released from the altered microenvironment. However, …
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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
… extracts (CCE) against the effect of induced UVB radiation in human dermal cells line (HSF1184). TK were qualitatively evaluated using semi-structured interviews with six informants. A total of 46 species of traditional vegetables from 41 genera and 25 families were recorded. The informants …
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Evaluating the impact of ultraviolet light on chemical and mechanical properties of human scalp hair through controlled and natural experiments
… exposure to environmental factors such as UV radiation, have been the focus of some studies. Even though there are a range of environmental variables that could be worthy of consideration, understanding the impact of UV radiation is increasingly important given the inevitability of exposure …
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UVB vermittelte DNA-Schäden und Immunsuppression in humanen dendritischen Zellen
Es gibt Hinweise, daß die durch UVB-Strahlung beeinflusste Funktion von antigenpräsentierenden Zellen (APZ), d.h. LZ in der Haut, mit UVB induzierten DNA-Schäden in Zusammenhang stehen. <br>In dieser Arbeit sollte geklärt werden, ob die durch UVB-Strahlung induzierte Hemmung der …
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Heat stress: A risk factor for skin carcinogenesis
… rapidly in the last few decades. Ultraviolet radiation (UV) is a major risk factor for skin carcinogenesis. UV, particularly the UVB spectrum, causes formation of cyclobutane pyrimidine dimers (CPD) in cellular DNA. Persistent and incorrectly repaired CPDs lead to DNA mutations and …