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.
Results
Showing 1 to 20 of 74 for “"UV exposure"”.
-
Microrna Functions In Uv-Induced Cutaneous Squamous Cell Carcinoma
… most common skin cancer, for which long term UV exposure and chronic wounding are the dominant risk factors. Despite these clinically established connections, little is understood about the early molecular response of human skin to UV exposure and its connection to acute wounding and cuSCC. …
-
The Use of Sphingomyelin to Protect Against UV Induced DNA Damage in Human Keratinocytes
… serious condition caused by chronic ultraviolet (UV) exposure that leads to DNA damage in skin. UV radiation has the potential to lead to DNA damage, which triggers biochemical pathways within a cell. The result is that the cell either undergoes cell cycle arrest, giving the cell time to repair …
-
Tailoring Local Conductivity by the Formation of Ag Nanoclusters in SiO2 Xerogel Films
… were formed within the pores of these films by UV exposure. Nanoparticle formation was confirmed by UV-visible spectroscopy and Transmission Electron Microscopy (TEM). Conductive Atomic Force Microscopy (CAFM) showed that the conductivity of the films decreased upon exposure to UV. This decrease …
-
A Paleolimnological Investigation into the Ecological Impacts of Permafrost Thaw Slumping on Cladocerans (Branchiopoda, Crustacea) in the Mackenzie Delta Region (Northwest Territories, Canada)
… questions: 1) Does thaw slumping increase UV exposure of Chydorus? 2) Are Daphnia absent in slump-affected lakes? I reconstructed UV exposure of Chydorus in a reference and slump-affected lake by measuring carapace absorbances at UV wavelengths. Carapace absorbances in the slump-affected …
-
Efficacy of Ultraviolet Light in Combination with Chemical Preservatives for the Reduction of Escherichia coli in Apple Cider
… juice being processed. The use of ultraviolet (UV) light, as an alternative to traditional thermal processing, has been adopted by some juice processors as a means of meeting the HACCP 5-log performance standard. However, little research had been performed to determine the effect of UV when used …
-
The Role of CDC25A in Ultraviolet-induced Nonmelanoma Skin Tumorigenesis
… in multiple types of human cancer. Ultraviolet (UV) irradiation, which causes most skin cancer, results in both DNA damage and CDC25A degradation. In order to investigate the role of CDC25A in the skin’s response to UV, we conditionally ablated Cdc25a in the skin by crossing Cdc25afl/fl mice with …
-
Effect of Ozone and Ultraviolet Irradiation Treatments on Listeria monocytogenes Populations in Chill Brines
… and 1% peptone water. Uridine was evaluated as a UV actinometric tool for brine solutions that were ozonated before UV treatment. The absorbance of uridine (A262) decreased after ozonation from 0.1329 to 0.0512 for standard 10 minutes UV exposure duration. Absorbance of uridine was influenced by …
-
Investigating the Role of Appearance-Based Factors in Predicting Sunbathing and Tanning Salon Use
… is an extremely important public health issue. UV exposure via sunbathing and utilization of sun lamps and tanning beds are considered important risk factors for the development of skin cancer. Psychosocial models of UV exposure are often based on theories of health behavior, but theory from the …
-
Investigation of Color Removal by Chemical Oxidation for Three Reactive Textile Dyes and Spent Textile Dye Wastewater
… of chlorine dioxide (ClO₂), ultraviolet (UV) irradiation, UV in combination with chlorine dioxide (UV/ClO₂), and UV in combination with hydrogen peroxide (UV/H₂O₂) for decolorizing three reactive azo dyes (sultan red, indigo blue and cypress green) and treated textile-manufacturing …
-
Evaluation of an Updated Version of the Food Frequency and Sun Exposure Questionnaire for Assessing Vitamin D Status in Active Population
… be obtained from both dietary sources and sun exposure. Food Frequency Questionnaires (FFQs) are one of the common methods used to estimate dietary intake. PURPOSE: Develop and validate the semiquantitative Food Frequency and Lifestyle Questionnaires (FFLQs) for assessing vitamin D intake using …
-
Functional characterization of pH and ultrasound treated soy protein based nanoemulsions with lutein
… freeze dried, and the characteristics such as UV stability, in vitro bioaccessibility of both original and freeze-dried and resuspended nanoemulsions (SEOF and SEEF) were studied. Particle size in soy nanoemulsions ranged from 99-127 nm. Lutein in both SEO and SEE formulations showed improved …
-
Evaluation of immobilizing horseradish peroxidase and alcohol oxidase in PVA-AWP polymer
… effects of polymer concentration, ultraviolet (UV) light exposure, and film thickness on the activity and stability of horseradish peroxidase (HRP) and alcohol oxidase (AOX) when immobilized in a photo-crosslinkable and water-soluble polymer, poly (vinyl alcohol) azide-unit water pendant …
-
The Impact of Atomic Hydrogen on the Properties of the Silicon/Silicon Dioxide Interface
… The effect of corona charging, humidity, UV exposure and mineral acid on Si and SiO2 interface was compared to the effect of atomic hydrogen. The electrical properties of thin, low temperature oxides, and in particular the degree of surface passivation achievable with such oxides, was also …
-
The Impact of Atomic Hydrogen on the Properties of the Silicon/Silicon Dioxide Interface
… The effect of corona charging, humidity, UV exposure and mineral acid on Si and SiO2 interface was compared to the effect of atomic hydrogen. The electrical properties of thin, low temperature oxides, and in particular the degree of surface passivation achievable with such oxides, was also …
-
Microcapsule-based self-protecting coatings
… (via electrochemical analysis) after damage and exposure to simulated salt water for five days. Fully autonomous self-healing coatings were also developed and demonstrated based on the UV curing of damage-triggered release of a sunlight curable epoxy resin from specially engineered UV-blocking …
-
Electrochemical and Photoelectrochemical Study of Conduction modes in Nanostructured TiO2 Films
… of the adsorption of molecular water. After UV exposure during 3h, and back to the dark, the quasi irreversible disappearance of the localized energy states is related to photo-induced adsorbed water dissociation at some sites on the surface of NT. Furthermore, the increase by a factor 112 of …
-
The association between circulating vitamin d levels and body composition in collegiate female athletes
… D concentrations, vitamin D intake, sunlight exposure, BMI, and body fat percentage in both indoor and outdoor female collegiate athletes during fall and spring seasons. Healthy collegiate female athletes, between the ages of 18-22, had BMI calculated from anthropometric measurements, body fat …
-
Pilot Awareness and Preventative Measures of Ultraviolet Radiation Effects at Altitude
Ultraviolet radiation exposure to pilots while flying at altitude is an issue that has not been widely distributed to the aviation community. Ultraviolet radiation can have long term effects on pilots, and yet there remains a gap in the practical understanding and the preventative measures that can …
-
The Role of Erbb2 in Ultraviolet-Induced Nonmelanoma Skin Carcinogenesis
… increasing. Most of these cancers are caused by UV, which has many effects on the skin. The RTK Erbb2 is activated by UV and is overexpressed in some skin cancer. Targeted Erbb2 overexpression in a mouse model leads to spontaneous skin tumor development [82, 86, 87], However, the role of Erbb2 in …
-
Design and applications of 4-yl-(methyl)coumarins and their derivatives
… photofuse can be problematic due to the long exposure times required for full conversion and the reactive byproducts that form upon UV exposure. Another photofuse, known as the 4-yl-(methyl)coumarin, is of particular interest because of its rapid photochemical response, lack of reactive …
Page 1 of 4