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 78 for “"repellent"”.
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Liquid repellent surfaces
… toxic chemical agents. In order to produce repellent coatings the surface must have a low surface energy. To obtain this, inert chemical groups need to be attached to the solid substrate. In addition to chemistry, surface roughness plays an important role in repellency. Liquid repellent …
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Multi-Modal Effects of the Repellent Deet Across Protostomia
… most broadly effective and widely used personal repellent available, yet we do not understand what makes it so effective. Even in well-studied species like Drosophila melanogaster flies and Aedes aegypti mosquitoes, many mysteries remain as to how DEET can affect behavior in these species. For …
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Designing liquid repellent surfaces for fabrics, feathers and fog
Omniphobicity refers to a property of surfaces which are not wetted by water, oils, alcohols and other low surface tension liquids. Robust omniphobic surfaces can be applied in many areas including fabrics with chemical / biological protection and dirt / fingerprint resistant touch screens. The …
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The water-repellent treatment of cotton fabrics with organo chlorosilanes
… methylchlorosilanes as an agent to produce water-repellent characteristics in cotton fabrics was patented by W.I. Patnode of the General Electric Company. Since very little information has been published on the process, this investigation was undertaken to determine the optimum conditions for …
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Multiple roles for Robo1/2 repellent receptors in guiding the facial nucleus and nerve
The facial nerve is necessary for our ability to eat, speak, and make facialgestures. To perform these vital functions, the nerve must accurately navigate from the hindbrain to the correct muscles during embryonic development. In the development of the facial nerve, both the cell bodies and the …
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Butterflies and batteries : advances in liquid repellent surfaces by anisotropic wetting and lubricant impregnation
Recent advances in creating liquid-repellent surfaces have focused on decreasing the interaction between a liquid and a solid surface by modifying the surface's chemistry and cleverly designing its geometry on nano- and millimetric length scales. This thesis explores two advances to control a …
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The toxicity and repellent properties of plant extracts used in ethnoveterinary medicine to control ticks
… that volatiles present in organic extracts are repellents and non-volatiles from aqueous extracts are toxic. Some of the fractions of C. glabrum had a higher tick repellency activity than the commercial tick control agents used as positive controls. Unfortunately the activity decreased after 2.5 …
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Nutritional Ecology of White-Tailed Deer: Assessment of an Index to Diet Quality and a Repellent
… caused by ungulates; although multiple repellents exist for deer, most are ineffective. Tannins are a plant defensive compound that have an astringent taste, reduce digestibility, reduce protein availability, and are toxic to rumen microbes, resulting in the reduction in feeding by large …
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Using Pheromone Lures, Insecticide Netting, and a Novel Food-Grade Repellent to Develop BMSB IPM Strategies
… so we tested the exclusion efficacy of repellents on overwintering shelters and found an 8-fold reduction in BMSB that entered shelters treated with geranyl cyclopentanone (apritone). The use of BMSB pheromones paired with insecticide netting for attract-and-kill of BMSB, the development …
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Synthesis Of 1,3-Dicinnamoyl-2-Acetylglycerol, A Natural Product Derived from Genus Populus that Demonstrates Beaver Repellent Properties
… form. Furthermore, the concentration of this repellent compound is generally greater in the bark of sprouts that are descendant from an adult that had been cut down, such as by a beaver. This suggests a previously undescribed inducible defense by aspen to beaver herbivory. To confirm the …
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Factors influencing arbovirus transmission: vector competence and the effects of virus infection on repellent response, oxidative stress, and glutathione-S-transferase activity
… at the effects of LACV and ZIKV infection on repellent response in Aedes mosquitoes and found that infected mosquitoes were refractory to low concentrations of DEET, picaridin, and PMD. Increasing concentrations of the repellents to ≥10% was able to increase percent protection (%p) against …
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Anthraquinone Corn Seed Treatment (Avitec™) As A Feeding Repellent for Ring-Necked Pheasants (Phasianus colchicus) on Newly Planted Corn in Eastern South Dakota
… (Avery 2003). AvitecTM is a 95% anthraquinone repellent that has been approved for emergency use in Wisconsin, Minnesota, and Michigan as a seed corn treatment where sandhill cranes (Grus canadensis) have been damaging corn fields by eating the corn seeds shortly after planting. In 2006, a …
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The Molecular Regulation of Spinal Nerve Outgrowth
… cartilage and bones of the vertebral column. Repellent cues are expressed in posterior half-sclerotomes in order to exclude navigating axons from “no-go” areas and restrict their growth to specific exit points of the future vertebral column. Interestingly, similar repellent cues (e.g. …
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Genetic, biochemical and behavioral studies of the chemotactic response in Bacillus 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 attractant stimuli in E. coli. There exists another mechanism in B. subtilis …
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Dynamic spatially resolved unilateral NMR measurements of liquid ingress and vapour adsorption and desorption in heterogeneous layered fabrics
… an adsorbent layer between two highly repellent layers, an “intelligent” fabric that can prevent complete penetration through the composite system by toxic vapours can be constructed. This project was undertaken with a low-field unilateral profile NMR Mouse® (MObile Universal Surface …
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A novel approach to control stored sorghum beetle Tribolium castaneum (Coleoptera: Tenebrionidae) in small-scale farmers’ storerooms in Kebbi- Nigeria
… in farmers’ perceptions of the efficacy of repellent plants were apparent. A more efficient and effective bioassay (Thigmotactic assay) was developed to identify a plant product highly repellent to T. castaneum, ‘Lem-ocimum,’ which is composed of Cymbopogon nardus (Lemongrass) plus Ocimum …
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Herbivorous insects interaction with entomopathogenic fungi (based on species of Hymenoptera and Lepidoptera orders) /
… affect mated Plodia interpunctella females as a repellent and 3-methyl-1-butanol acts both as a repellent (in high doses) and as an attractant (in lower doses). It was proved for the first time that 3-methyl-1-butanol can be a marker to recognise fungus-infected substrates.
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Knowledge, Perceptions, and Practices: Mosquito-borne Disease Transmission in Southwest Virginia
… water around the home and wearing insect repellent were highlighted. Knowledge of mosquito-borne diseases within the area was generally low, with only one individual correctly identifying La Crosse encephalitis as a threat in the region. Higher numbers (6%) were aware of West Nile virus, …
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Investigating Droplet Impact Dynamics on Engineered Surfaces: Effects of Roughness, Wettability, and Prospects for Anti-Icing Applications
… properties, including roughness and water-repellent coatings, influence the behavior of droplets as they spread, rebound, or freeze. By utilizing high-speed imaging techniques, the study captured droplet behavior on various materials, identifying key surface design features that improve …
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Chemotactic Methylation in Bacillus Subtilis (Chemosensory, Adaptation)
… 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 of the response of the Bacillus subtilis …
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