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 66 for “"UVB"”.
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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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Behavioral Response to UVB Differs in Subalpine Populations of Daphnia Melanica
<em>Daphnia </em>are a genus of freshwater zooplankton that inhabit ponds and lakes. They are commonly used as a model organism because they can reproduce clonally and are considered a foundation species in pond ecosystems. <em>Daphnia melanica</em> that inhabit the subalpine ponds of the Olympic …
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A poli-ADP-riboziláció szerepe a HaCaT sejtek UVB sugárzás okozta sejthalálban
… szerepének vizsgálata HaCaT sejtvonalon UVB sugárzás hatására bekövetkező sejthalál során. Különböző PARP gátlószerek hatásának vizsgálata.
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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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Molecular Dynamics of p21 and Fluorescent Sphingomyelin in Keratinocytes Exposed to UVB
<p>Non-melanoma skin cancer (NMSC) is the most common malignant tumor, representing more than a third of all malignant tumors combined and the incidence is increasing every year. Ultraviolet (UV) radiation from the sun is the most dominant factor contributing to tumor initiation and progression. …
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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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Einfluss von UVB-Strahlung auf die Antigen-präsentierende Funktion Dendritischer Zellen - Apoptoseinduktion bei T-Zellen
… der Immunantwort durch niedrigdosierte UVB-Bestrahlung muriner LZ konnte bereits gezeigt werden (Denfeld et al., 1998; Simon et al., 1992; Simon et al., 1991). <br>Wir fanden eine verminderte Proliferation muriner TZ, die mit allogenen UVB-DZ koinkubiert waren. Diese …
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Assessing the Photoprotective Effects of Fluorescent Sphingomyelin Against UVB Induced DNA Damage in Human Keratinocytes
<p>Non Melanoma Skin Cancer (NMSC) affects 3.3 million Americans each year and results from Ultra Violet Radiation (UVR) damage to DNA in the form of pyrimidine dimers and photoproducts [1]–[5]. Cells directly detect the damage and initiate apoptosis, cell cycle arrest, or DNA repair by modulating …
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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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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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Die Rolle von Bcl-2 bei der UV- und TRAIL-induzierten Keratinozytenapoptose
In Keratinozyten wird sowohl durch UVB als auch durch PUVA-Bestrahlung Apoptose induziert. Wir untersuchten die in Keratinozyten durch UVB, PUVA, UVA und Todesliganden wie TRAIL ausgelösten Apoptosewege näher. UVB und PUVA, nicht aber UVA-Bestrahlung lösen in vitro Keratinozytenapoptose aus. 2-4 h …
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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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Men and Women are Not Just From Different Planets: The Role of Sex-Based Differences in the Prevention of Non-Melanoma Skin Cancer
… after equivalent, chronic ultraviolet light B (UVB) exposure, male mice had greater tumor multiplicity, burden, and grade compared to female mice. Additionally, our acute UVB studies revealed decreased antioxidant capacity and cutaneous inflammation in male mice, suggesting that topical …
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Heat stress: A risk factor for skin carcinogenesis
… 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 consequently, formation of cutaneous lesions. Interestingly, recent epidemiological studies …
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Fréquence et distribution des dimères cyclobutyliques de pyrimidines suite à une exposition aux UV et évaluation de l’effet protecteur de l’acide sulfonique 2-phénylbenzymidazole-5
… des DCP. Grâce à sa capacité à absorber les UVB, l’acide sulfonique 2-phénylbenzymidazole-5 (PBSA) est utilisé dans des écrans solaires mais des études in vitro ont montré qu’il peut oxyder les guanines lors d’une irradiation aux UVB. Face à ces problèmes, nous avons choisi d’étudier l’effet …
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Analyzing a calcium-dependent UV response that results in a global chromatin compaction in mammalian cells
… a global chromatin structural changes upon UVB radiation, we used a fluorometric detection approach. We observed large-scale chromatin compaction immediately after UVB radiation in mouse embryonic fibroblasts, human cervical cancer cells (HeLa), and primary human epidermal melanocytes …
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Estrogen receptor involvement in the response of human keratinocytes to ultraviolet B irradiation
The signaling mechanisms involved in UVB-induced skin cancer are complex and although the scope of this work is inherently limited in focus, the findings may provide insight into how estrogen receptor signaling impacts cell growth, senescence, and apoptosis to protect keratinocytes. Additional …
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