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 10 of 10 for “"oxygen scavenger"”.
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Antiviral activities of selected Chinese medicinal plants
… was demonstrated to be of the singlet oxygen type that could be reduced by the presence of a singlet oxygen scavenger. In comparisons of mechanisms of action with that of hypericin in the presence and absence of light, the two compounds showed similar potencies in light but hypericin …
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The synthesis of aza-dipyrromethenes as potential pdt agents and measurement of singlet oxygen generation.
… photosensistiser that produces cytotoxic singlet oxygen (1O2) after light irradiation. Current approved photosensitisers have limitations, such as a low extinction coefficient in the desired therapeutic wavelength of absorption (600 “ 900 nm), as in the case of Photofrin®. The discovery of …
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Glucose oxidase induction and the modelling of gluconic acid production using Aspergillus niger
… oxidase catalyses the conversion of glucose, oxygen and water to hydrogen peroxide and gluconic acid. This enzyme is used as a glucose and oxygen scavenger in the food industry and as a diagnostic tool in medicine for glucose determination. Gluconic acid is an organic acid used as a …
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Multiphase Aging of Atmospheric Biomass Burning Brown Carbon
… state of the organic aerosols. The role that oxygen, and the subsequent reactive species formed by the presence of oxygen, plays in this absorption enhancement was also investigated. In particular, UV light exposure in the absence of oxygen does not lead to absorption enhancement in the …
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Kinetic Decay of a Polymer/Ink Complex as an O2 Indicator
… (NaHSO<sub>3</sub>) was used as the initial oxygen scavenger and to drive the reduction of the ITS. Studies were predominantly done in solution phase through the dilution of the ink systems. Fluorescence spectroscopy was the primary method used to determine the kinetic decay rates and …
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Preventing Oxidation of Dairy Powders Using Oxygen Removal Packaging
… modified atmosphere with a novel palladium-based oxygen removing catalyst and stored for eight weeks at 50°C. Powders stored in air with no catalyst and powders stored with the catalyst in an atmosphere modified to contain 5.7% hydrogen in nitrogen were evaluated by instrumental, chemical, and …
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Interfacial Phenomena and Surface Forces of Hydrophobic Solids
… instead water vapor. Furthermore, addition of an oxygen scavenger agent, sodium sulfite, to a liquid phase that had been pressured with oxygen did not reduce bubble size which could be evidence that nanobubbles are impermeable to gas diffusion across the gas liquid interface, do not form from the …
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Physiological, hormonal and metabolic alterations caused by selenium in rice seedlings
… treatment, L- methionine did not affect reactive oxygen species production, hormone biosynthesis and growth of seedlings, indicating an exclusive Se effect. Treatment with 1,4-diazabicyclooctane (DABCO), a singlet oxygen scavenger, overrode the repressive effect of SeMet in seedling growth. It is …
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Electrodeposition of High Magnetostrictive Cobalt Iron Alloy Films for Smart Tags and Sensor Applications
… films and the inclusion of additives acting as oxygen scavengers to stabilize deposition. The characteristics of the deposited films were controlled through the additives, temperature, agitation, concentrations, current density, and duty cycle of the pulsing regime. After initial chemistry …
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Use of Antimycotics, Modified Atmospheres, and Packaging to Affect Mold Spoilage in Dairy Products
The effects of natamycin, oxygen scavengers and a 25% CO₂:75% N₂ modified atmosphere on the growth of <I>Penicillium roqueforti</I> in shredded cheddar and mozzarella cheese stored at 10°C for 0, 60, 120, or 180 day was studied. Microbiological and sensory testing was assessed on 0, 7, 14 and 21 …