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 132 for “"Odors"”.
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Modeling and measuring the dispersion of odors from hog confinements
1 PDF file (viii, 90 pages)
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Behavioral Response of Pacific Lamprey (Entosphenus tridentatus) to Predator Odors
… in the response of lamprey to the other three odors. However, tests using the decayed lamprey odorant (<em>t</em>-test; <em>P </em>= 0.47 for counts and <em>P </em>= 0.16 for duration) were indicative of a repellent response for duration. Results from this study indicate that Pacific lamprey …
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Reduction of odors associated with chlorine dioxide applications to drinking water
… the reduction of trihalomethanes and tastes-and-odors. Recently, chlorine dioxide was implicated as the source of offensive "cat-urine-like" and "kerosene-like" odors in drinking water. The purpose of this project was to determine the cause of odors observed in customers homes at times when …
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The smell of altruism: Incidental pleasant odors and chemosignal as prosocial decisions moderators
… showed the existence of associations between odors and prosocial behavior, much less data are available on the links between olfaction and donation in favor of public goods. Thus, the main purpose of the series of experiments described in this thesis is precisely that to shed some light on the …
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Treatment of algae-induced tastes and odors by chlorine, chlorine dioxide and permanganate
… oxidants for the removal of grassy and cucumber odors associated with the pure compounds, cis-3-hexenol and trans-2, cis-6-nonadienal, respectively, and for the removal of fishy odors associated with a culture of an alga, Synura petersenii. The effects of the oxidants on the pure compounds were …
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The Effect of Cations on Volatile Solids Destruction, Odors, and Dewatering in anaerobic digestion
The primary purpose of this study is to understand the effects of wastewater sludge feed cations on volatile solids destruction, odor control, and dewaterability. The role of influent feed cations and addition of chemical coagulants to sludge were evaluated for those characteristics following …
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Food Habits, Growth, Conversion Efficiency and Response to Prey Odors of the Copperhead, Agkistrodon Contortrix
… tongue flick rate (TFR) during exposure to food odors were investigated during this study. Sixty-one adult copperheads were examined for prey remains and yielded 31 prey items of which 50% were small mammals. Captive neonates were observed to feed only on small skinks, various small colubrid …
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Impacts of the use of magnesia versus iron on mesophilic anaerobic digestion and odors in wastewater
… process and also lead to higher organic sulfur odors and deteriorating biosolids quality. The following research focuses on finding an alternative to the use of iron in wastewater systems by comparing the roles of iron and magnesium on mesophilic anaerobic digestion, the digested effluent …
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Processing of plant-associated odors by a subset of projection neurons in the antennal lobe of the female moth, Manduca sexta
… Manduca sexta is able to discriminate among odors and to mediate a behavioral response, such as feeding or oviposition in females. This dissertation research describes attempts to elucidate neural coding involved in the processing of odors within the first-order olfactory center of the brain, …
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Identification and generation pattern of odor-causing compounds in dewatered biosolids during long-term storage and effect of digestion and dewatering techniques on odors
… the compounds responsible for persistent odors in biosolids during long-term storage using olfactometry measurements and to determine their generation pattern with regard to time of appearance and decline using gas chromatography-mass spectrometry (GC-MS). Another objective of this study …
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Evaluation of Dechlorinating Agents and Disposable Containers for Odor Testing of Drinking Water
… chlorine odor often masks other more subtle odors that may eventually cause consumer complaints. As treated water travels from the water treatment plant to the consumer, chlorine residual diminishes and may reveal a water's naturally less-pleasing odors. Consequently, odor monitoring at the …
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Responses of Python regius to animal chemosensory stimuli: Implications of foraging ecology
… item may belong to. Snakes were exposed to novel odors from homeothermic and poikilothermic animals. Prey Searching Behavior (amount of locomotion) and Information Gathering Behavior (tongue flicking) were observed. Habituation to odors resulted in decreased behaviors. Odors of homeothermic …
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Destruction of algae-produced taste-and-odor compounds by chlorine, potassium permanganate, and chlorine dioxide
… (cyanobacteria), which cause earthy and musty odors, respectively. Little work has been performed, however, on equally obnoxious odors caused by other golden-brown and yellow-brown algae which are responsible for fishy, grassy, floral, and melon odors. Additionally, the production of odorous …
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Applications of Sensory Analysis for Water Quality Assessment
… unprecedented outbreaks of unpleasant tastes and odors in their drinking water. During both TandO events strong 'earthy', 'musty' odors were reported, but the source was not identified. The first TandO event began in early February, 2015 and coincided with an algal bloom in the Dan River. The …
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Investigating the Role of Various Environment and Process Conditions in Wastewater Sludge Odor Generation
… facilities are known to emit malodorous odors causing public inconvenience. The odors typically comprise of reduced organo sulfur based compounds and nitrogen containing compounds. Lime stabilization is a technique which is commonly used in the wastewater industry to produce biosolids …
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Evaluation of Odor-Reducing Commercial Products for Animal Waste
… were tested for their efficacy in reducing odors from dairy and swine wastes. A sensory panel method was utilized for odor evaluations, in which the panel played an important part. Comparisons between products were made for agitated and unagitated conditions and effect of storage time (three …
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Anaerobic Digestion: Factors Effecting Odor Generation
… land application of biosolids is nuisance odors associated with biosolids. Despite its importance, few studies have been done to enhance our knowledge of odor causing processes. This study was conducted to evaluate the effects of some factors that have been thought to be linked to odor …
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Lipid oxidation in food and model system
… sniffing showed 22 regions wherein distinct odors could be detected which consisted of green/grassy, cheesy, mushroom, citrusy, floral, fishy, fatty, waxy, among others. These odors could be important to off-odors and off-flavors developed in oxidized food systems containing arachidonate.
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Effect of Vitamin E, Irradiation, and Display Time on the Quality and Sensory Characteristics of Pork
… has been associated with the generation of off odors and color changes in meat products. The objective of this study was to evaluate the effect of dietary vitamin E on the incidence of off odors and color changes in pork exposed to low dose irradiation. Pigs (n = 4/dietary treatment, 3 …
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An evaluation of the effectiveness of FreshCase® technology to extend the shelf life of beef and pork
… By the point at which spoilage was detected, off-odors of putrid, acid, sour and rancidity for FreshCase®-packaged samples were detected, but were present at very low level. Likewise, by the point of spoilage, no significant differences (P > 0.05) were found between samples in control and …
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