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dc.contributor.authorOmur-Ozbek, Pinaren_US
dc.date.accessioned2017-04-06T15:43:55Z
dc.date.available2017-04-06T15:43:55Z
dc.date.issued2008-09-12en_US
dc.identifier.otheretd-09262008-005856en_US
dc.identifier.urihttp://hdl.handle.net/10919/77226
dc.description.abstractDuring 20th century main concern was to have sanitary water flowing through the tap. In 21st century constant supply of safe drinking water is common at any home in USA. Hence consumers pay attention to aesthetic quality of tap water. Odorous algal metabolites in source water and metals introduced to drinking water due to corrosion of pipes in the distribution system cause taste, odor and color problems, and result in complaints and perception of tap water as unhealthy. Millions of dollars are spent each year by water industry to address and prevent these issues. This research focused on some of the taste-and-odor issues associated with drinking water. First aim was to understand when geosmin, 2-MIB, and nonadienal become detectable, employing two-resistance mass transfer theory to determine the concentration of odorants in bathroom air. Results showed that water temperature and odorant concentration in water play an important role. Next focus was to develop an international odor standard to be used for training of sensory analysis panelists. There are many sensory methods to monitor drinking water to detect the off-flavors however an odor standard has been missing. Hexanal was studied with trained flavor profile analysis panels and was proposed as an ideal odor reference standard to be used for training and sensory assessment of water samples. Main focus was to understand metallic flavor of drinking water caused by iron and copper. It was shown that metallic sensation has taste and retronasal components creating the flavor and humans are very sensitive to it. Occurrence of lipid oxidation in the oral cavity was shown when metals were ingested, that produces carbonyls which are responsible for the metallic flavor. Antioxidants and chelators were investigated to study prevention of lipid oxidation and, chelators were determined to be more effective. Oral epithelial cell cultures were developed as a model for oral cavity to further investigate lipid oxidation and effectiveness of the antioxidants and chelators. This dissertation is a result of inter-disciplinary work and possibly a good example for how problems may be solved by incorporating different methods and point of views from several disciplines.en_US
dc.language.isoen_USen_US
dc.publisherVirginia Techen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectOral Epithelial Cellsen_US
dc.subjectFPAen_US
dc.subjectHexanalen_US
dc.subjectMetallic Flavoren_US
dc.subjectTaste-and-Odoren_US
dc.subjectDrinking Wateren_US
dc.subjectAntioxidantsen_US
dc.subjectChelatorsen_US
dc.subjectSDS-PAGEen_US
dc.subjectCopperen_US
dc.subjectTBARSen_US
dc.subjectLipid Oxidationen_US
dc.subjectIronen_US
dc.titleMacromolecular Reactions and Sensory Perception at the Air-Water-Human Interfaceen_US
dc.typeDissertationen_US
dc.contributor.departmentEnvironmental Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEnvironmental Engineeringen_US
dc.contributor.committeechairDietrich, Andrea M.en_US
dc.contributor.committeememberDuncan, Susan E.en_US
dc.contributor.committeememberLittle, John C.en_US
dc.contributor.committeememberEdwards, Marc A.en_US
dc.contributor.committeememberLee, Yong Wooen_US
dc.type.dcmitypeTexten_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09262008-005856/en_US
dc.date.sdate2008-09-26en_US
dc.date.rdate2016-10-07
dc.date.adate2008-10-28en_US


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