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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 54 for “"attractants"”.
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Managing deer: attractants, repellents, invasion modelling and impact assessment
… and use of additional approaches, including attractants and repellents. These remain largely untested on deer in the British Isles, therefore this thesis aims to develop knowledge of the efficacy of each of these. In addition, with the continuing invasion of introduced deer species, …
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Chemical Ecology of Defense Compounds in Anasa Species (Heteroptera: Coreidae) and Volatile Attractants for Diabrotica Species (Coleoptera: Chrysomelidae) (Attractants, Glands, Corn Rootworms, Electron Microscopy, Squash Bug)
Two separate investigations of insect chemical ecology were conducted. The first study elucidated the ultrastructure of the metathoracic scent glands of Anasa tristis and the chemical composition of secretions from the metathoracic glands of A. tristis and A. armigera and the abdominal glands of A. …
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Mosquitoes, West Nile Virus, Attractants, Competition, Environmental Conditions, and Insecticide Resistance
… Facility, 2) assay various mosquito oviposition attractants on West Nile virus positive female mosquitoes, 3) test effects of distance between mosquito infusion attractants, 4) determine effects of study site location, treatment, and competition distances on mosquito collections, 5) test for any …
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Floral derived compounds as attractants for agricultural pests in the family Noctuidae
… male and female Noctuidae and may be used to as attractants in crop protection. For the first time the following research compares two types of floral volatile blends - those that mimic natural floral odours and those that are artifical odour blends ('super-blends'). In wind tunnel bioassays and …
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Feed attractants in aquaculture - the chemical composition of aquacultured Ulva lacinulata (Chlorophyta)
… to 0.5 g FU. The effectiveness of F8 and F9 as attractants and feed stimulants were investigated further in a comparative study against fresh Ulva (FU), dry Ulva (DU) and crude Ulva extract (CE) on T. gratilla (n = 80). Data collected indicated that the treatment with FU was the most effective …
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Elucidation of the Specificity of S. meliloti Chemoreceptors for Host Derived Attractants
… stachydrine, and trigonelline are potent attractants for S. meliloti, McpX is the most important chemoreceptor for chemotaxis to these QACs, and we demonstrate the binding strength of McpX to the QACs with dissociation constants ranging from low millimolar to low nanomolar, thus making …
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Hindgut secretions in <I> Camponotus pennsylvanicus </I> (De Geer) (Hymenoptera: Formicidae): attractants and nitrogenous excretory materials
The anatomical source of the trail pheromone in the black carpenter ant, <I> Camponotus pennsylvanicus </I>, was investigated by presenting workers with crude or synthetic hindgut extracts to test for attractancy and trail-following behavior. Chemical analysis was used in conjunction with …
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The Role of Attractants and Feeding Stimulants in The Selection of Cucurbita Flowers by Diabroticite Beetles, (Coleoptera: Chrysomelidae)
The floral fragrance of the male blossoms of Cucurbita maxima was analyzed chemically to determine the presence of olfactory stimulants for diabroticite beetles. While the mixture contained at least 40 components only one, indole, produced a substantial response in an electroantennogram bioassay. …
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Biochemical Separation of Geographical Strains of Plum Curculio, Conotrachelus nenuphar (Herbst) (Coleoptera: Curculionidae), and Evaluation of Olfactory Attractants in Virginia Orchards
Plum curculio, Conotrachelus nenuphar (Herbst), is an endemic pest of stone and pome crops of the eastern United States. Two morphologically identical strains of plum curculio have been described and documented in Virgina: a univoltine strain and a multivoltine strain. Because of the cryptic …
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The Decision to Pursue the Principalship: Perspectives of Certified Administrators in Upstate Central New York
… qualitative research study sought to uncover the attractants and deterrents of educational administrative positions in Upstate Central New York (CNY) public schools by exploring the perspectives of both practicing principals and those that are certified but not currently employed in an …
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Biochemical and molecular characterization of chemotaxis genes in Bacillus subtilis
… formation in response to the addition of attractants.
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Orientation of polyphagous lepidoptera to hostplant kairomones
… Volatile constituents are known to serve as attractants for ovipositing moths. These compounds differentially stimulate electrophysiological responses in antennae of male and female moths and can also serve as larval attractants. Similarly, ovipositing female adults and feeding larvae use …
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Behavioral Responses of Diabroticite Beetles to Selected Olfactory and Visual Cues (Coleoptera: Chrysomelidae)
… height) in the presence and absence of chemical attractants were also evaluated. Studies were carried out under field conditions, using naturally occurring populations of Diabroticite beetles in a field of Blue Hubbard squash and along hybrid corn fields. Differences were found in species …
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Chemotactic Methylation in Bacillus Subtilis (Chemosensory, Adaptation)
… subtilis accumulate at higher concentrations of attractants and away from high concentrations of repellents. Methylation and demethylation of methyl-accepting chemotaxis proteins (MCPs) has been demonstrated to play a central role in this process. The goal of this work was to clarify the nature …
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Isolation and Characterization of a Novel Motility Mutant in SALMONELLA TYPHIMURIUM
… of BT40 cells in capillary tubes containing attractants was decreased by 33%-59% compared to ST23, but BT40 had a normal response to attractants in temporal assays. The methylation level of the chemotactic proteins was decreased in BT40. At room temperature, the mean swimming speed was 11 …
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Tactic behaviors in bacterial dynamics
… to chemical agents) near particles exuding attractants, a small-scale process with global-scale implications for the biogeochemistry of the oceans. Three cases were investigated: a stationary particle, a slowly moving particle and a particle that generates a hydrodynamic wake in the form of …
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Yellow Perch Production and Harvest Strategies for Semi-Permanent Wetlands in Eastern South Dakota
… nets and cloverleaf traps with and without light attractants) used for harvesting small yellow perch (age < 2) and minimizing the bycatch of black bullheads and large yellow perch (age > 2). Due to the small openings, cloverleaf traps captured significantly fewer black bullheads than fyke nets and …
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Black and turkey vulture roost dynamics, marking, morphology and nesting in Virginia
… be most effective when accompanied by removal of attractants. Accretion of fecal material on metal leg bands constricted tarsi of black and turkey vultures. Teflon bands did not constrict the tarsus, but tag loss was high. Adult black vultures had longer tarsi and shorter wing chords than …
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Exploring Aethina tumida Biology and the Impacts of Environmental Factors to Generate Novel Management Strategies
… tested and sensitivity of A. tumida to several attractants and repellents was quantified on behavioral and physiological levels. An additional source of attractive volatiles is the A. tumida fungal symbiont Kodamaea ohmeri, which ferments larval waste and is present throughout the A. tumida …
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Studies on CheA(B): Phosphorylation, methylation and behavioral control during chemotactic signal transduction in Bacillus subtilis
… E}$ mediates the effect of binding of attractants or repellents at the MCPs (receptors) by altering its rate of autophosphorylation and subsequent phosphorylation of CheY, to bring about behavioral change, and CheB, to bring about adaptation. CheA$\sb{\rm B}$ appears to play a similar …
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