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 11 of 11 for “"ecdysteroids"”.
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CHARACTERIZING ECDYSTEROID TITER PROFILES AND THE FUNCTIONAL ROLE OF ECDYSTEROIDS IN ADULT WORKER HONEY BEES (APIS MELLIFERA)
… of adult worker honey bees (Apis mellifera L.). Ecdysteroids have been thought to play little role in the physiology of adult worker honey bees outside of reproduction because little was known about ecdysteroid production across the lifespan of individual workers. The data reported here reveal …
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Phytochemical Investigation and Drug Interaction Potential of <em>Cyanotis vaga</em>
… for its anabolic effects, due to its richness of ecdysteroids. Even though <em>C. vaga</em> is a commedicinal plant (dietary supplement), there are no reports about its effect on the drug metabolizing enzyme Cytochromes P450 to predict its interaction with concomitantly used medications. In this …
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Evidence for the Role of Ecdysteroids in the Genital Sex Pheromone of Two species of Hard Ticks, <i>Dermacentor variabilis</i> (Say) and <i>Dermacentor andersoni</i> Stiles
… by electrophysiological techniques.</p> <p>Ecdysteroids, specifically ecdysone and 20-OH-ecdysone were shown to be present in the anterior reproductive tracts in excess of amounts that could be explained by mere hemolymph contamination. Ecdysteroids were also found in washings of the vaginal …
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Circadian Organization of the Neuroendocrine System of an Adult Insect, Rhodnius Prolixus (STÄL) (HEMIPTERA)
… controlled by the circadian clock in the brain. Ecdysteroids are also present during this time and their levels in hemolymph and ovaries undergo synchronous daily variations that are likewise under clock control. Ovaries are the only adult tissue examined that both contained and released …
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Endocrine control of fat body composition and effects of the insect growth regulators methoprene and pyriproxyfen on the development and reproduction of the Argentinian cockroach, Blaptica dubia Serville (Blattaria: Blaberidae)
… of juvenile hormone (JH) III and free ecdysteroids (ecdysone, 20-hydroxyecdysone) were measured in the haemolymph of adult females by the use of HPLC-mass spectrometry. The JH III titer shows significant peaks during vitellogenesis and ovarian growth, and towards the end of the period …
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Molecular Analysis of acDNA and Gene Encoding a Protein From Rigid Cuticles of the Giant Silkmoth, Hyalophora Cecropia
… its expression is regulated by juvenoids and ecdysteroids, making this an attractive model system in which to study metamorphosis at the genetic level.
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Factors regulating signal composition and task allocation in colonies of the ant Myrmicaria eumenoides
… suggests that juvenile hormones (JHs) and ecdysteroids are the prime endocrine control candidates. The aim of this project is to investigate how signalling and task allocation are dynamically governed in M. eumenoides colonies. Firstly, the CHC profiles of individual workers in relation to …
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Measuring juvenile hormone and ecdysteroid titers in insect haemolymph simultaneously by LC-MS: The basis for determining the effectiveness of plant-derived alkaloids as insect growth regulators
… species. Juvenile hormones (JHs), JH diols and ecdysteroids were easily separated by high performance-liquid chromatography (HPLC) in less than 20 min using a reversed-phase C18 column and a methanol-water gradient. Subjecting the JH-JHBP (juvenile hormone binding protein) complex to HPLC was …
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Molecular characterization and functional analysis of cytochrome P450 genes in the yellow fever mosquito Aedes aegypti (Diptera: Culicidae)
… compounds, including juvenile hormones, ecdysteroids and fatty acids, in insects. Despite rapid advances in revealing various P450 genes in insects, our knowledge on the role of these genes in detoxification of insecticides is very limited. This research was to perform a genome-wide …
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Breaking the MF curse: the regulatory role of the Methyl farnesoate – MEKRE93 pathway in crustacean molting
Ecdysis, or the active shedding of the exoskeleton, is critical for arthropod growth, development, and/or regeneration of lost or damaged appendages. The antagonistic interaction between the steroid hormone 20-hydroxyecdysone (20-E) and the sesquiterpenoid juvenile hormone (JH) control insect …
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The endocrinology and evolution of tropical social wasps: from casteless groups to high societies
… observed in Polistes. For instance, circulating ecdysteroids are important for establishing dominance in Polistes, yet they are not biologically relevant in P. micans or S. surinama. The wild deviations in endocrine function in these wasps parallel the loss (or inversion) of hormone functions …