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 110 for “"Chemosensory"”.
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Chemosensory Evaluation of Prostate Cancer Cells
Prostate cancer is the most commonly diagnosed disease and second most commonly caused death among men in America. Although much controversy surrounds the current methods of detection, PSA test and biopsy, no new methods have been approved as an effective method of detection. Biomarkers and …
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Chemotactic Methylation in Bacillus Subtilis (Chemosensory, Adaptation)
Chemotaxis is the process by which bacteria such as Escherichia coli, Salmonella typhimurium, and Bacillus subtilis accumulate at higher concentrations of attractants and away from high concentrations of repellents. Methylation and demethylation of methyl-accepting chemotaxis proteins (MCPs) has …
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Molecular modeling and simulation of bacterial chemosensory arrays
… conserved sensory apparatus, known as the chemosensory array, which involves the clustering of thousands of proteins into a highly cooperative signaling network. The present dissertation will present my work using techniques in computational modeling and simulation to investigate the …
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Neural processing of chemosensory information from the locust ovipositor
… The central nervous projections of their four chemosensory and one mechanosensory neurons from single basiconic sensilla were stained selectively, focussing on receptors on the ovipositor valves, which usually contact the substrate during the pre oviposition probing movements. All axons and …
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Neural processing of chemosensory information from the locust legs
Tarsal chemoreceptors in phytophagous insects can provide information on the chemical nature of the leaf surface, and are thus potentially important in host plant discrimination. Ovipositing Pieris brassicae, for example, drum the surface of leaves with their tarsi and tarsal chemoreceptors have …
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Chemosensory Behavior and Development of African Male Elephants (Loxodonta Africana)
… male elephants develop movement, social and chemosensory behaviors over four major life changes. The first goal of this study was to compare behavior among four classes of wild African male elephants in Addo Elephant National Park, South Africa. The second goal was to determine if adult …
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Chemosensory gene expression analysis in the argentine ant, linepithema humile
… to determine expression patterns of a subset of chemosensory genes, including odorant receptors (Ors) and odorant binding proteins (OBPs), in the invasive Argentine ant, Linepithema humile. Fragments of two Ors were identified from a whole ant EST project, which suggested their potential …
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Cells that Kill: The Chemosensory Cell Types of Aedes aegypti Mosquitoes
… on the molecular underpinnings of mosquito chemosensory cell types. In olfaction, research following the cloning of the first odorant receptors in1991 has shown that each mouse olfactory sensory neuron (OSN) expresses a single odorant receptor. Early work in Drosophila melanogaster flies …
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Behavioral Response of Sternotherus Odoratus to Conspecific and Predatory Chemosensory Cues
All marine and most freshwater turtle species possess Rathke's glands. These glands exhibit similar morphological and histochemical properties across many species and release small amounts of odorous secretion. The function of this secretion is unknown, however several hypotheses exist. This study …
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COMPARATIVE GENOMICS OF CHEMOSENSORY GENE FAMILIES AMONG MEMBERS OF THE HELIOTHINAE
Insect chemosensory systems play crucial roles in the perception of chemical signals that regulate sexual behaviors and odors that mediate insect-host plant interactions. These processes, mate-finding and acceptance, as well as host plant identification and use, strongly contribute to …
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Chemosensory Evaluation of Training and Oxidative Stress in Long Distance Runners
Athletes complete a balance of training loads and rest periods, risking overtraining when this balance favors excessive training. Diagnostic biomarkers have been suggested but a clear diagnostic method is not available. This preliminary study's objective was to use data standardization to improve …
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Chemosensory Evaluation of Training and Oxidative Stress in Long Distance Runners
Athletic performance is improved by increasing training loads but it is difficult to determine an athlete's response to a training load and the amount of stress incurred. This makes athletes susceptible to overtraining, leading to decreased performance levels, due to physical exhaustion and …
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Responses of Python regius to animal chemosensory stimuli: Implications of foraging ecology
… be innate and is not dependent on thermal cues. Chemosensory stimuli appear to be the only stimuli which may indicate to P. regius the metabolic group that a dead prey item at room temperature item may belong to. Snakes were exposed to novel odors from homeothermic and poikilothermic animals. …
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Sexually Dimorphic Developmental Patterns of Chemosensory Behaviors in African Elephants (Loxodonta Africana)
… subadults and adults) in the performance of chemosensory behaviors. African elephants were studied at a waterhole in 2004-5 at Ndarakwai Ranch, Tanzania. I identified 277 elephants and 26 distinct female-offspring groups. Sex differences in the chemosensory repertoire and rate of behaviors …
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Chemosensory properties of different Ulva extracts and their effects on Tripneustes gratilla
… and palatability. This study investigated the chemosensory preferences of the tropical sea urchin Tripneustes gratilla for four crude extracts of Ulva as well as Fresh Ulva and an artificial feed. The four crude extracts of Ulva (Methanolic, Ethanolic, Chloroform and Chloroform-Methanol …
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Patterns of Chemosensory Behavior in a Closed Population of Wild African Elephants (Loxodonta Africana)
<p>Chemosensory behaviors are used by many mammalian species to assess chemical signals in the environment. These chemical signals may contain important information about reproductive state, identity, status, or location of conspecifics. Elephants are a long-lived species and males reproduce at a …
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Evidence of Non-Strike Induced Chemosensory Searching by Eastern Copperheads (Agkistrodon Contortrix) During Cicada Predation
… of active foraging through non-strike induced chemosensory searching (NSICS) was previously found in cottonmouths (<italic>A. piscivorus</italic>) but could not be replicated with A. contortrix in later experiments. I observed foraging methods similar to non-strike induced chemoreception when …
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Paradoxically Sparse Chemosensory Tuning in Broadly-Integrating External Granule Cells in the Mouse Accessory Olfactory Bulb
The file named "ZHANG-PRIMARY-2022-1.pdf" is the primary dissertation file. Seven (7) supplemental video files are also available and may be viewed individually.
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Studies on Host-Seeking Behavior and Differential Chemosensory Gene Expression in Above- and Below-ground Culex Pipiens
… which led me to quantify the expression of two chemosensory genes: odorant binding proteins (OBPs) 2 and 12. Both OBPs were more highly expressed in the heads of human-preferring females. While the patterns of OBP2 expression indicate that it may contribute to human host detection, OBP12 …
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