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 26 for “"Sunscreen"”.
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Synthesis of corn-derived carbohydrate derivatives as effective multifunctional sunscreen
The eighty-years-old sunscreen industry is sustained by the growing incidence of skin cancer and the continual exploration of skin aging. From the UVB-induced erythema to the UVA-induced persistent pigment darkening, scientists have used versatile methods to reveal that not only does UVB damage …
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Attitudes and Behaviors of Adolescents toward Sunbathing and Sunscreen Use.
… behaviors of adolescents toward sunbathing and sunscreen use by employing the Theory of Alternative Behaviors (Jaccard, 1981) with adolescent participants and a respective parent co-participant.</p> <p>Females were found to be more likely to engage in intentional suntanning efforts, to stay in …
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Is there an association between frontal fibrosing alopecia and sunscreen actives?
… whether there is an association between FFA and sunscreen actives, and to compare this with a histologically similar condition (lichen planopilaris - LPP) and another which also affects the marginal scalp (Traction alopecia – TA). The objectives were to obtain archival pathology tissue collected …
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Skin Cancer Risk Perception and Sunscreen Use in Adolescent Female Soccer Athletes
… rays from the sun. Research has shown that sunscreen use is protective of all skin cancers, especially melanoma. The purpose of this study was to obtain perceptions about risk of skin cancer and sunscreen use among 13- to 18-year-old adolescent female club soccer athletes as a basis for …
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Exploring the Relationship Between Sunscreen Use and Screen Time in American High School Students
… phones, televisions, gaming devices, etc…) and sunscreen usage among American high school students grades 9-12.Materials and methods: Data from the Youth Risk Behavior Surveillance System (YRBSS), administered by the Centers for Disease Control and Prevention to high school students across the …
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The Use of Sphingomyelin to Protect Against UV Induced DNA Damage in Human Keratinocytes
… cell time to repair DNA damage, or apoptosis. Sunscreen is the most commonly used treatment for preventing UV induced skin damage, but it involves a number of undesirable and toxic side effects including damaging the dermis, premature aging of skin and underweight child births. This has led to …
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Fundamentals of heterogeneous photocatalysis ; and, Consequences of inorganic and organic UV sunblocks on DNA
… It is also commonly employed in commercial sunscreen lotions as a physical filter to block UVA/UVB sunlight radiation, designed to protect people from sunburns and skin cancers. The thesis is two-dimensional. Part A deals with fundamental studies of photocatalysis. Part B addresses more …
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A Mixed-Method Examination of Social Media Influencers’ Source Characteristics in Sponsored Health Campaign Messaging: An Application of Psychological Reactance Theory
… of three sponsored Instagram posts encouraging sunscreen use. The messages manipulated the source of the message and sponsorship congruence. Results of a serial mediation analysis indicated that sponsorship congruence (relative to non-congruence) and an influencer message (relative to a …
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Unraveling the mystery of leaf reddening in seagrasses
… by the accumulation of anthocyanins, acts as a sunscreen during periods of high UV and visible light intensities, can be an indicator of UV-B exposure, and may be either transiently or permanently expressed in leaves. The findings of this study imply that leaf reddening could increase seagrass …
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Factors Associated with Pollinator Foraging and Floral Morphology of Lawn Weeds
… brightener, pigmented fungicide, commercial sunscreen, turf colorant, and other deterrent strategies to reduce pollinator foraging on weedy flowers in turfgrass. Field studies were conducted from 2021 to 2023 to evaluate the effect of these treatments on floral morphology and ultraviolet (UV) …
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Photoallergic contact dermatitis in Europe
… concentration of the 19 ultraviolet sunscreen absorbers to be used in the EMCPPTS. The issue of attempting to determine the photoallergenic potential of the EMCPPTS agents with respect to exposure patterns is addressed by conducting a sunscreen survey in the UK. The EMCPPTS itself is …
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Particle-chemical interactions and environmental chemodynamics of fine and ultrafine particles in a natural disaster scenario
… dioxide particles, embedded into paint and sunscreen-coated surfaces or as aerosolized particulates. Kinetic data for the degradation rates of organic compounds on these paint and sunscreen surfaces is severely lacking, especially for the semi-volatiles. Surface reaction experiments are …
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Role of High Molecular Weight Hyaluronan in Ultraviolet B Light-Induced Transformation
… is the key risk factor for these cancers but sunscreen has proven ineffective in their prevention, indicating a need for new prophylactic agents. Chronic elevation of high molecular weight (HMW) tissue hyaluronan (HA) in skin is linked to tumor resistance in the naked mole rat. To directly …
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A determination of vitamin D status and intake of pregnant and non-pregnant Saudi Arabian women in Mecca, Saudi Arabia
… occupation, skin color, smoking status, use of sunscreen, use of supplements, and sun exposure were correlated to vitamin D status. Dietary and supplement intake was assessed. Among the participants, 50.8% (35% P, 65% NP) women had 25(OH)D concentration that were ≤ 11 ng/mL. PTH concentrations …
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Pilot Awareness and Preventative Measures of Ultraviolet Radiation Effects at Altitude
… new parameters are introduced, such as applying sunscreen before flight, we will see long time benefits.
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Protective Effects of Milk Phospholipids Against UV-Induced DNA Damage in Human Skin Cells
… radiation from the sun. Some of the most common sunscreen ingredients are unstable and can form harmful radicals upon exposure to UV radiation. There is a strong clinical need for a more stable and effective sunscreen ingredient such as bovine milk phospholipids (MP). Phospholipids were shown to …
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Investigation of Experimental Variation of Bovine Sphingomyelin as a Novel Ingredient for Ultraviolet Protection
… against those ultraviolet waves is to apply sunscreen, however, recent reports call into question the safety of some active ingredients as they can enter through the skin into the bloodstream [3]. This thesis aims to investigate an alternative solution that uses bovine sphingomyelin (BSM) as …
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Contributions to Variable Selection in Complexly Sampled Case-control Models, Epidemiology of 72-hour Emergency Department Readmission, and Out-of-site Migration Rate Estimation Using Pseudo-tagged Longitudinal Data
… backwards elimination. Our results show that sunscreen usage, level of agreeing with the statement "behaviors can affect high blood pressure", age, intent to eat more or less fruit, average daily hours spent watching tv or playing video games, and level of agreeing with the statement "I would …
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Evaluation of an Updated Version of the Food Frequency and Sun Exposure Questionnaire for Assessing Vitamin D Status in Active Population
… and lifestyle factors, including sun exposure, sunscreen, and outdoor activities. Statistical analyses including paired t-tests, Spearman Rank Correlation, and Bland-Altman analysis were applied to determine the agreement and correlation between the FFLQ, food records, and serum 25(OH)D …
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Characterizing Engineered Nanomaterials: From Environmental, Health and Safety Research to the Development of Shaped Nanosphere Lithography for Metamaterials
… dispersed forms as well as directly in consumer sunscreen products. The most important finding was that the commercial sunscreens that listed titania or zinc oxide as ingredients contained nanoscale materials. Cell free photochemical tests revealed that ZnO particles without any surface coating …
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