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 53 for “"Bleach"”.
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Preparation of strong bleach solutions
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1944
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Dynamic simulation of brown stock washers and bleach plants
… simulators of brown stock washers and multistage bleach plants were developed for process control. SIMNON, a dynamic simulation language, was employed as a platform for constructing the simulators. The washing process simulator was used to investigate dynamic behavior of a three-stage …
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A comparison of antichlors used in scrubbing chlorine and chlorine dioxide from bleach plant vent gases
… scale trials were completed. Work was done on a bleach plant-packed tower scrubber system at a kraft pulp and paper mill. The pilot study was performed at pH's of 10.0 to 12.0 and therefore may have masked the scrubbing potential of two, lower pH, antichlors. Results from the full-scale trials …
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The Analysis of Ballpoint Inks with APCI-MS after Fading with Light, Hydrogen Peroxide and Sodium Hypochlorite Bleach
… Light, hydrogen peroxide and sodium hypochlorite bleach were used to simulate natural and deliberate fading of inks and dye solutions. Benzophenone and phenol molecules were identified as degradation products but their presence differed for each of the different conditions tested such as no phenol …
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Chlorhexidine Interaction with Microcrystalline Cellulose
… with sodium hypochlorite, a common cleanser and bleach, forming potentially toxic byproducts. This reaction is particularly concerning in both medical settings and everyday laundering, where chlorhexidine-treated fabrics washed with bleach develop permanent stains due to chemical interactions …
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Effects of Alpha-Tocopherol Antioxidant on the Bonding Properties of Resin Adhesive to Dentin Bleached with Sodium Perborate
… have shown diminished capacity for bonding after bleaching teeth. Reversal of the bond strengths back to pre-bleached levels can be obtained with application of 10% alpha-tocopherol in a 2-hour time frame, or by delaying bonding for two weeks. This study evaluated the effectiveness of a 5-minute …
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A cost effectiveness analysis of different ways of analyzing sputum for turberculosis diagnosis: direct smear microscopy, natural sedimentation and centrifugation
… chemicals such as sodium hypochlorite (household bleach) and subsequent concentration with gravity (natural) sedimentation and centrifugation. This study estimated the costs and cost-effectiveness of these techniques in processing sputum for detecting new cases of pulmonary tuberculosis in Malawi. …
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Effect of Alternative Household Sanitizing Formulations Including: Tea Tree Oil, Borax, and Vinegar, to Inactivate Foodborne Pathogens on Food Contact Surfaces
… alternative or "green" sanitizers instead of bleach or other common chemical sanitizers. The purpose of this work was to evaluate the effectiveness of one suggested alternative, tea tree oil, as a food contact surface sanitizer. Three foodborne bacterial pathogens (Listeria monocytogenes …
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Hydroxyl radical activity in bleached root-filled teeth
… are generated when hydrogen peroxide is used to bleach root-filled teeth which have been discoloured by blood components.
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Physicochemical and biological treatment of a textile dyeing and finishing wastewater
… project consisted of thermosol dye, print, and bleach and finish waste streams. The goal of this research project was to continue work on this wastewater that was initiated by Weber (1994). Pretreatment experiments were performed on the bleach and finish stream in an attempt to reduce organic …
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Efficiency of Using Commercial DNA Extraction Kits and the Organic Extraction Method in Removal of Polymerase Chain Reaction Inhibitors
… wood chips, and cotton swatches treated with bleach. DNA was extracted from all samples and controls using three extraction procedures and quantitated. The AmpflSTR Identifiler kit was used to develop genetic profiles to assess the quality of the extracted DNA. The overall recovery of DNA was …
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Analyses Of Pultruded Polyester/ E-Glass Composites Subjected To Environmental Degradation
… 1000 hours) in five different environments: UV, bleach, hydrochloric acid, distilled water at 125â°f, and room temperature salt water. Three-point flexural bending and short beam strength tests were undertaken to determine the effects these environments would have on the composite when compared …
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Asymmetric catalytic epoxidations of simple olefins
… intermediates. The use of commercially available bleach solution as the oxidant greatly increases the practical value of this asymmetric epoxidation process.
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Methods to Detect Apoptosis in Equine Peripheral Blood Neutrophils from Normal Healthy Adult Horses
… to induce necrosis using a freeze-thaw cycle and bleach. A control sample was examined (no inducer) to determine spontaneous rate of apoptosis. The aliquots were cultured and the percentage of apoptosis determined at two sequential time points for each horse. Apoptosis was measured at either 30 …
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Walk Feminine, Talk Feminine:A Critical Textual Analysis of Femininities,Performances, and Representations
… class, and sexuality in the anime Bleach and Samurai Champloo. I also interrogate the implications of these performances in relation to hegemonic discourses of Japanese femininity in the U.S. as submissive, deferent, incompetent, and domestic. As I explain in this document many …
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A Chemical Comparison of Two Different Oxidizing Bleaches and the History of Early European Paper and Papermaking
Background: The bleaching of paper is an important and controversial treatment employed in the conservation of art. The use of a bleach may greatly enhance the quality of an image but at a cost of lost structural integrity. In order to fully consider the ramifications of bleaching a paper artifact, …
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MEASUREMENTS OF ATMOSPHERIC RADICALS IN AMBIENT AND INDOOR ENVIRONMENTS: OUTDOOR-INDOOR RELATIONSHIPS, INDOOR FORMATION MECHANISMS, AND INSTRUMENTAL ANALYSIS
… radical chemistry involving terpene-based and bleach cleaners were investigated during HOMEChem (House Observations of Microbial and Environmental Chemistry) and iRACE (Indoor Radical and Aerosol Chemistry Experiments). In iRACE, secondary oxidation products, radicals, and new particle …
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Effects of feeder surface cleaning on <i>Mycoplasma gallisepticum</i> transmission in House Finches
… cleaning feeders often with a common household bleach wipe can reduce disease spread. I used a pathogen of songbirds, mostly house finches, that is common at bird feeders across North America: the bacteria Mycoplasma gallisepticum (MG). MG causes severe "pink eye"-like symptoms and sluggish …
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Polymer-supported reagents for disinfection of water
… to the dichlorosulfonamide groups by laundry bleach acidified with acetic acid. The concentration of sulfonamide groups was determined by its chlorine holding capacity. The resin was further characterized by photoacoustic infrared spectroscopy. Tap water, sparged with air to remove chlorine, …
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Investigating physiological and genetic characteristics of community acquired infections and potential antimicrobial interventions
… for biofilm formation. In suspension, household bleach and NaDCC caused >5 log reduction in viable counts and on stainless steel surfaces, there was <3.5 log reduction. Against biofilms, Household bleach at 5000ppm caused 100% biofilm eradication within 10 minutes while NaDCC eradicated <50% of …
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