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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 82 for “"light irradiation"”.
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Inactivation mechanisms of adenovirus from exposure to polychromatic ultraviolet light irradiation
Ultraviolet (UV) light is a drinking water treatment technology that has gained popularity as an alternative to control chlorine-resistant pathogens and comply with regulations on disinfection byproduct formation. Human adenovirus (HAdV) is found in water sources around the world and can cause …
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Development of a new actinometric method for polychromatic light irradiation. Application to photochromes, drugs and stilbenoids
… to describe photochemical reactions under irradiation by polychromatic light for three chosen AB reaction systems. In the development of the above-mentioned methodologies, this research selects species based on their photochemical reaction mechanisms to study their photodegradation, …
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Effects of fluorine modifiers and gold colloids in enhancing photocatalytic activity of TiO2 under visible light irradiation
The process where a light-activated catalyst is used to break down organic contaminant is known as photocatalysis. In the class of photocatalyst, titanium dioxide (TiO2) has isolated itself on top of the list and widely applied in environmental remediation including water treatment. In addition to …
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Photocatalytic Degradation of Perfluorooctanoic Acid in Water by Free and Immobilised ZnO, g-C3N4 and Their Composite under UV and Visible Light Irradiation
… for PFOA degradation, under ultraviolet (UV) irradiation. More interestingly, suspended ZnO nanoparticles showed promising for PFOA degradation under visible light irradiation (unlike In₂O₃ nanoparticles). The probable production of sulphate radicals by the addition of peroxymonosulfate (PMS) …
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Culturing and processing of Dunaliella for enrichment of enzymatic antioxidants
… combined effect of exogenous abiotic stressors [light (15, 145, 550 µmol photons m-2 s-1), temperature (10, 20, 30°C), nitrogen level (0.05, 0.5, 5 mM KNO3)] on cell density, the accumulation of antioxidant molecules, antioxidant enzyme activity and protein content were investigated. To evaluate …
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Preparation of bioactive surface via gel oxidation on titanium for biomedical application (hip joint replacement)
… on in vitro bioactivity of titanium. UV light irradiation was used to study the effect on in vitro bioactivity of titanium. Alkalitreated titanium subjected to heat treatment in air have shown better overall in vitro performance than those treated in argon atmosphere. Therefore, the …
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UV light inactivation of adenovirus, coxsackievirus and murine norovirus
… of low-pressure (LP) and medium-pressure (MP) UV light irradiation to inactivate waterborne pathogens that are an increasing concern in drinking water. The inactivation of pathogens depends directly on the total UV dose or fluence (UV intensity multiplied by contact time) received by the …
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ORGANOMETALLIC AND PHOTOCHEMISTRY OF CERIUM AND THORIUM COMPLEXES AND PHOTOCATALYTIC SYSTEMS FOR THE GENERATION OF CHLORINE RADICALS.
… The reaction has a rate-limiting step of lLight irradiation is the rate-limiting step in reactions withusing cerium(IV) catalysts. A cChlorine radical is generated during light irradiation and activates C-H bonds for yielding a carbon centered radical. This carbon radical can be trapped in …
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Irradiação da luz violeta associada ao peróxido de carbamida para clareamento dentário em consultório: uma revisão sistemática e meta-análise
Introduction: Violet light irradiation has been proposed to enhance the in-office bleaching effect of carbamide peroxide. However, a systematic review and meta-analysis are needed to summarize the evidence and guide clinical recommendations. The objective of this study was to evaluate, through a …
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Photon-induced vortex-antivortex pair creation in superconducting films
… junction arrays in the presence of 850 nm light irradiation. Specifically the experiments aim to distinguish between the formation of vortex-antivortex pairs by single photon absorption and by thermal activation. The major objective for this experiment is to investigate the possibility of …
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Harnessing Light-Responsive Structural Control in Surfactant Assemblies
… ability to manipulate nanoscale structure using light creates the potential for the next generation of smart, responsive materials. To create functional materials, lyotropic liquid crystals (LLCs) are ideal candidates due to their hierarchically-ordered nanostructures that are highly sensitive to …
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Design of Iron Oxide-Flavin Nanocomposite Bacterial Cellulose Hydrogels
… the textile industry – when irradiated with blue light for 3 hours in the presence of either 2-(N-morpholino)ethanesulfonic acid (MES) or ethylenediaminetetraacetic acid EDTA (0.1M, pH 6) as electron donors. Furthermore, the photodegradation reaction was successful both in an O2 environment and in …
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Development of titanium dioxide nanoparticles/nanosolution for photocatalytic activity
… unfortunately is limited only under UV light irradiation. Therefore, the aim of this work was to investigate the potential of TiO2 that can be activated under visible light by the incorporation of metal ions (Fe, Ag, Zr and Ag-Zr). In this study, sol-gel method was employed for the …
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PHOTO-GUIDED SHAPE TRANSFORMATION OF COMPOSITE HYDROGEL SHEETS
… in biomimetics, soft robotics, biomedicine, etc. Light as a clean energy source can be remotely delivered to material with high spatial and temporal resolution, which brings new controllability to shape-transformation of hydrogel material. However, the current strategy of using light to control …
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Spectroscopic investigations of new glass-ionomer dental cements
… (due to polysalt formation) with and without light irradiation. The differences of the polysalt formation were explained based on the formation of the polymer network due to the light-induced polymerization.;Fluorescence spectra of polyacids were also collected to explain the fluorescence …
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Light-activated gene expression
… of genes by using small synthetic molecules and light. In the late 1990s, we first demonstrated this concept by using as a photo-caged β-estradiol, the hormone for the estrogen receptor (ER). This work opened the door to other light-controlled ligand/receptor systems by the Koh group and others. …
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SYNTHESIS, CHARACTERIZATION OF 3D GRAPHENE-BASED MACROASSEMBLIES AND THEIR ENVIRONMENTAL REMEDIATION APPLICATIONS
… manner: (i) functional design of visible-light absorbing 3D graphene-based photocatalysts, doped with heteroatoms (nitrogen (N), boron (B) and sulfur (S)) in different amounts and different molecular configurations; (ii) evaluation of the photocatalytic performance of as-synthesized …
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Synthesis and Characterization of Carbon Monoxide Producers Bipyridine Flavonolate Palladium(II) and Platinum(II) Complexes: Potential Anti-Cancer Agents
… under various conditions of temperature and light irradiation. The nitroxygenation reaction of the palladium complexes was also studied with nitrosyl hydride, HNO, generated in situ from Angeli’s salt. Deoxymyoglobin was used to trap CO released from the complexes, and the reaction was …
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Syntheses of a Tin (IV) meso-Tetra(4-pyridyl) Porphyrin Dichloride-Tetrachlorobis (Bipy)2 Ruthenium (II) Complex and Studies of Photophysical Properties of 1-Nitropyrene
… can act as a photosensitizer by using visible light. Upon visible light irradiation 1-nitropyrene can produce <sup>1</sup>O<sub>2</sub>, ȮH, and possibly NO species under aerobic conditions and can produce ȮH and possibly NO under anaerobic conditions. </p>
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