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 13 of 13 for “"UV light exposure"”.
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Use of Ultraviolet Light for the Inactivation of Listeria monocytogenes and Lactic Acid Bacteria Species in Recycled Chill Brines
… bacteria and passed through the ultraviolet (UV) treatment system for 60 minutes. Three replications of each bacteria and brine combination were performed and resulted in at least a 4.5 log reduction in microbial numbers in all treated brines after exposure to ultraviolet light. Bacterial …
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Photodegradation of biopolymer doped with titanium dioxide (TiO2) as ultraviolet (UV) stabilizer
… the resistance of the biopolymer to ultraviolet (UV) light exposure. The virgin oil (VO) and waste oil (WO) was converted into biomonomer. By adding biomonomer with an appropriate amount of 4, 4’-methylene diphenyl diisocyanate (MDI) and solvent, the virgin oil polymer (VOP) and waste oil polymer …
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Photodegradation of biopolymer doped with titanium dioxide (TiO2) as ultraviolet (UV) stabilizer
… the resistance of the biopolymer to ultraviolet (UV) light exposure. The virgin oil (VO) and waste oil (WO) was converted into biomonomer. By adding biomonomer with an appropriate amount of 4, 4’-methylene diphenyl diisocyanate (MDI) and solvent, the virgin oil polymer (VOP) and waste oil polymer …
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Multiphase Aging of Atmospheric Biomass Burning Brown Carbon
… on climate through their ability to absorb light, and potentially contributing to warming effects. Due to the expected increase of wildfire activity in the upcoming years, this source of particulate emission is also expected to increase. Oxidative and photochemical aging in the atmosphere, …
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Stem cell membrane engineering: an approach for modulating cell-biomaterial interactions
… finding, and the combinatorial effects of UV light exposure. In addition, we systematically optimized dosage effects and explored the potential influence of biomaterial conjugation on cell viability as well as the retention of biomaterial domains during stem cell culture. The presented …
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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 COVID-19 pandemic has highlighted the urgent need for rapid and effective methods to investigate pathogens, particularly those with high mutation rates like RNA respiratory viruses. Understanding the virus's seasonal dynamics and identifying new potential therapeutic targets are key factors in …
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Effect of Heavy Metals on Bacteria
… the bacteria and viable counts were obtained via light scattering. Bacteria were grown on rich media (LB broth) as well as mineral M9 media supplemented with and without casamino acids and growth rates were compared. Another objective in this study was to identify genes in E. coli mutants that …
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Analytical and numerical studies on mismatch strain related problems
… properties can be changed by ultraviolet (UV) light exposure. Gradients of material properties, swelling ratio and young’s modulus, leads to self-assembling in Toluene solution. An analytical model based on beam theory and principle of minimum potential energy was used to predict the …
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Cloning of "Animal Cryptochrome" cDNA from the Model Organism <i>CHLAMYDOMONAS REINHARDTII</i> for Functional Analysis of Its Protein Product
… the circadian clock. Cryptochromes are the blue light photoreceptors that entrain the clock in some organisms. The CPH1 protein of <i>C. reinhardtii</i> resembles the cryptochromes of the plant model <i>Arabidopsis</i>, but whether CPH1 entrains the circadian clock in <i>C. reinhardtii</i> is not …
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Microstructural Analysis and Assessment of the Anterior Ocular Surface Damage Caused by Ultraviolet Light from Natural and Artificial Sources // Възможности за микроструктурен анализ и оценка на уврежданията на предната очна повърхност от ултравиолетови лъчи с естествен и изкуствен произход
Трудът оценява и описва микроструктурните промени на очната повърхност, получени в отговор на излагане на УВ светлина от естествен и изкуствен източник. Резултатите са съпоставени със слънцезащитните навици като се проследява тяхната динамика, използвайки in vivo конфокална микроскопия. За период …
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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 …
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Phototoxic target lipid model for predicting the toxicity of polycyclic aromatic hydrocarbons and petroleum to aquatic life
… PAHs and heterocyclic PAHs some of which absorb light in the ultraviolet light (UV) and visible (VIS) regions. The result is increased photo-enhanced toxicity, by a factor of two to greater than 1000 in the presence of light. -- The PAHs in petroleum differ in their properties, such as …
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Intact and Damaged DNA and their Interaction with DNA-Binding Proteins: a Single Molecule Approach
… study of long DNA molecules that carry UV-light photolesions at random sites. An exposure of DNA to UV light introduces different modifications to the DNA structure: regions of unpaired DNA of different lengths, sharp kinks, the presence of knot like structures and single-strand breaks. …