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 69 for “"attractant"”.
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Pengaruh dosis minyak atsiri dari beberapa jenis ocimum sebagai attractant lalat buah (Bactrocera sp)
… metil eugenol, yang dapat digunakan sebagai attractant lalat buah. Penggunaan metil eugenol (C12H24O2) merupakan cara yang tepat untuk mengendalikan hama lalat buah (Bactrocera sp), karena selain ramah lingkungan, juga tidak meninggalkan residu pada komoditas yang akan dikonsumsi. Berdasarkan …
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Field assessment of a sex attractant for control of grass grub, Costelytra zealandica (White)
… simple water traps baited with the synthetic sex attractant, Durez 12687. Populations were monitored before, during and after the trapping period by sampling the subterranean eggs, larvae and adults. Trapping extended for three weeks during which time large numbers of beetles were captured and …
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Attractant properties of chemical constituents of the green macroalga Ulva and their response effects on the commercially important sea urchin Tripneustes gratilla
Interest in commercial sea urchin aquaculture is growing worldwide. This is because sea urchins have good quality roe which is a delicacy in many countries. Since the quality of sea urchin roe is dependent on what the sea urchin eats, increased research is being carried out to understand sea urchin …
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Characterization of the Response Regulator *Chev and Its Role in Bacillus Subtilis Chemotaxis
… for efficient adaptation to addition of an attractant and it is necessary for response to the removal of the attractant in the absence of the methylation system.
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Genetic, biochemical and behavioral studies of the chemotactic response in Bacillus subtilis
… functions to promote adaptation to attractant stimuli in B. subtilis whereas it serves to promote adaptation to repellent stimuli in E. coli. CheR, the methyltransferase, functions to promote adaptation to repellent stimuli in B. subtilis whereas it serves to promote adaptation to …
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Demonstration of pheromonal activity in the breeding glands of dwarf African clawed frogs (Hymenochirus sp.)
… through chemical means, but the source of the attractant has not been identified. By exposing female Hymenochirus sp. to choice tests in a Y -maze it was demonstrated that the breeding glands of male Hymenochirus sp. are the source of a mate-attractant pheromone. This study represents the first …
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Dynamic localization of chemotaxis proteins in Bacillus subtilis
… and reorganize only locally in response to attractant binding. Recent studies have shown, however, that these structures are in fact much more fluid. Previous study on localization of the chemotaxis proteins is mostly in Escherichia coli, which is relatively simple in terms of chemotaxis …
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Exploring the Structural Dynamics of Bacterial Chemotaxis
… are transmembrane chemoreceptors, which bind attractant ligands in the periplasmic domain and transmit ligand occupancy information through the cytoplasmic domain to inhibit a downstream histidine kinase that regulates motor control. Receptors are hypothesized to transmit this signal via …
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The Plant Diet of Mosquitoes: Sugar Feeding on Ornamentals and Wildflowers
… of developing a novel, ecologically friendly attractant. Similarly, we observed the sugar feeding behavior of invasive species Aedes japonicus on the toxic native flower fly poison and assessed its suitability as a naturally sourced attractant and toxin for use in attractive toxic sugar baits. …
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A Community's Natural Resistance to Invasion by Cheatgrass and the Effects of Associational Herbivory
… low-density cheatgrass patches, supporting the attractant-source hypothesis that predicts associational susceptibility. Through indirect effects, invading species may generate important shifts in herbivory on native 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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Engineering chemoattractant gradients using controlled release polysaccharide microspheres
Chemoattractant gradients play important roles in the normal function of immune system, from lymphocyte homeostasis to mounting efficient immune responses against infection. Improved fundamental knowledge about the role of chemoattractant gradients developed around single source cells in …
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Characterization of the Chemoreceptors in the Bacillus Subtilis Chemotaxis System
… changes in the affinity of the chemoreceptor for attractant and receptor activation. These findings suggest a novel, more complicated role for methylation than previously suggested, and lead to a clearer picture of the coordination of the three adaptational systems in the B. subtilis chemotactic …
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Transmembrane Signaling in Bacillus Subtilis Chemotaxis: Determination of the Packing Organization and Structural Changes of McpB in Response to Ligand
… and a serine active site mutant in vivo to the attractant asparagine to determine the role CheB phosphorylation plays in regulation of receptor demethylation events. Phosphorylation was required for normal methylesterase activity and complementation in vivo; however, enhanced methanol formation …
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Understanding how neutrophils self-organise their migration to sites of inflammation in vivo
… that neutrophil swarming is driven by autocrine attractant production, notably of the lipid leukotriene B4 (LTB4). The decision to release attractants at the single-cell level is important and impacts the magnitude of the entire immune response. However, the precise mechanisms triggering this …
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The Use of Fishery Wastes in the Feeds for Farmed Fish
… present. The use of fishery wastes as a feeding attractant was the second method investigated. Ensiled fishery wastes were sprayed onto dry diets; no consistent improvement in intake or growth rate of rainbow trout fed such diets was apparent, and fish did not preferentially select feed from …
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Elucidation of the Specificity of S. meliloti Chemoreceptors for Host Derived Attractants
… here focus on discovering alfalfa derived attractant signals and matching them to their respective chemoreceptors in S. meliloti. We have determined the chemotactic potency of alfalfa seed exudate and characterized and quantified two classes of attractant compounds exuded by germinating …
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Fatty Acids as a Potential Foraging Cue in Bumblebee Pollen Detection
… suggests that pollen fats are a chemical attractant potentially important to pollinator species.
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Investigation of the Roles of CheD in the Bacillus Subtilis Chemotactic Signal Transduction
… and move towards more favorable conditions. The attractant signals can be sensed by transmembrane chemoreceptors, and then transmitted to the histidine kinase CheA. Once activated, CheA interacts with the response regulator CheY through phosphorelay, which causes a change in the rotation of the …
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The Role of Attractants and Feeding Stimulants in The Selection of Cucurbita Flowers by Diabroticite Beetles, (Coleoptera: Chrysomelidae)
… using sticky traps showed it to be a potent attractant of the western corn rootworm, Diabrotica virgifera virgifera Le Conte and the striped cucumber beetle, Acalymma vittatum (Fabr.). The southern corn rootworm, Diabrotica undecimpunctata howardi Barber, however, was not attracted to indole …
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