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 2809 for “"UV"”.
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Characteristics of the UV Load to the Anterior Eye Segment – A New UV Dosimetry Method /// Характеристика на UV натоварването на преден очен сегмент – нов метод за UV дозиметрия
… в извънлабораторни условия метод за индивидуална UV дозиметрия, оценяващ прецизно както моментното, така и кумулативното UV натоварване на зрителния анализатор. Да се приложи на практика създадения метод. Настоящото проучване включва създаване и пилотно прилагане на UV дозиметър на зрителния …
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UV-resistance locus 8 and UV-B specific signaling in Arabidopsis thaliana
UV-B is a natural component of the sunlight spectrum. As a result of the potentially harmful effects of this radiation, plants have evolved a highly effective suit of protective and repair mechanisms. However, the signalling pathways that control such responses are not yet well known. For example …
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UV Disinfection between Concentric Cylinders
… of the most resistant pathogens. Ultraviolet (UV) disinfection is one of the promising methods to reach this 5-log reduction of pathogens. The absorption coefficients of juices typically vary from 10 to 40 1/cm and can be even higher depending on brand and processing conditions. Thin film …
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Direct UV-written waveguide devices
… waveguide structures based on the direct UV and direct grating writing fabrication techniques. The latter approach allows simultaneous definition of waveguide structures and Bragg gratings.<br/><br/>The first result of this work describes the fabrication and characterisation of small angle …
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Novel direct UV written devices
… thesis reports a series of developments based on UV writing of novel waveguide structures. The first section is an investigation into the production of Direct UV-written channel waveguides on the perimeter of a cylindrical substrate. Cylindrical waveguides were produced using variants of the …
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UV stabilisation of poly(ethylene terephthalate)
… this project was to design novel polymerisable UV absorbers which successfully protect PET from UV degradation for a longer duration of time compared to non-polymerisable UV stabilising additives. The polymerisable UV stabilisers for PET were synthesised using cyanuric chloride as a synthetic …
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Identification of Near-Uv Chromophores and Characterization of Cellular Responses to Near-Uv Damage and Oxygen Stress
… effect. DNA is the primary chromophore in the UV-C region of electromagnetic spectrum (100-280nm; also known as Far UV or germicidal-UV), and its interaction with UV-C has been extensively studied. However, DNA has very little absorbance in the UV-A region (315-400nm). The identification of …
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The UV/H2O2 advanced oxidation process in UV disinfection units : removal of selected phosphate esters by hydroxyl radical
… esters through hydroxyl radical generated by the UV/H202 process applied at a UV disinfection unit was selected for evaluation. The second-order rate constants of the reactions of two phosphate esters, Tri(2-butoxyethyl) phosphate (TBEP) and Tri-2-chloroethyl phosphate (TCEP) , with hydroxyl …
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Development and applications of UV written waveguides
… structures suitable for the technique of Direct UV Writing and demonstrates applications for which the resultant waveguiding devices may be used. The later stages of the thesis present several applications of the direct UV writing process and of devices fabricated by the technique. Firstly, …
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Strukturelle Klebungen mit UV- und lichthärtenden Acrylaten
UV- und lichthärtenden Acrylatklebstoffen steht ein breites Anwendungsspektrum im Konstruktiven Glasbau offen. Ihr farbloses und klares Erscheinungsbild fördert eine Konstruktion, die transparent und leicht wirken soll. Kurze Aushärtezeiten, die sich im Sekunden- oder einstelligen Minutenbereich …
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A GAN-BASED HUMAN UV COORDINATES ESTIMATION
… efficient generation of modified content. Human UV coordinates estimation establishes correspondences between 3D human body surface representations and 2D texture pixels. It is widely used in image/video editing, augmented reality, and human-computer interaction. This thesis focuses on the …
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UV-curable organic-inorganic hybrid polyurethane coating
… that were cured with a single ultraviolet (UV) trigger but two photo-initiators. Upon UV irradiation, the free-radical initiator initiated a free-radical reaction for acrylate cross-linking, and the photo-latent base initiated a sol-gel reaction for condensation of the silanes. This study …
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UV-initiated synthesis of novel urethane polymers
The Barton reaction involves the photoinitiated rearrangement of nitrite esters and is used primarily in the synthesis of complex steroidal structures. The rearrangement results in the introduction of active hydrogen atoms into the molecule and a novel use of this reaction for the production of …
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Photosynthetic and oxidative stress in the green alga Dunaliella tertiolecta: The effects of UV-B and UV-A radiation
<p>The penetration of ultraviolet-B (UV-B; 290-320 nm) into the biosphere has increased in response to decreased stratospheric ozone. As a consequence, significant attempts have been made to elucidate the effects of UV-B radiation on primary producers such as phytoplankton and plants. Considerably …
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Evaluation of the degradation of per- and polyfluoroalkyl substances (PFAS) using UV-activated silica-based granular media (UV/SGM)
… activated silica based granular media (UV/SGM) was developed to break down PFAS into non-harmful inorganic species within concentrated wastes. UV/SGM operates as a packed bed column reactor which allows PFAS to adsorb to the photocatalytic media and subsequently degrade through the …
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UV-sensitivity in quantum gravity and path integral measure [Sensibilità UV in gravità quantistica e la misura del path integral]
… quarticamente e quadraticamente sensibili all’UV (scala di Planck) nell’energia del vuoto $\rho_{vac}=\Lambda_{cc}/8\pi G$, dove $\Lambda_{cc}$ e $G$ sono rispettivamente la costante cosmologica e la constante di Newton. Il confronto con il valore osservato di $\rho_{vac}$ svela un severo …
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