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 23 for “"Lymnaea"”.
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The ecology of Lymnaea tomentosa Pfeiffer
[Typewritten]
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The effects of anaesthetic agents on synapses of lymnaea stagnalis (L.)
… and inhibitory, and injection of GABA into Lymnaea has been shown to result in behavioural changes in feeding, locomotion, escape reactions, male mating and respiration. Injection of Na-thiopentone into the whole animal was carried out in this investigation, in order to establish the …
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Cholinergic and peptidergic responses of pedal A cluster cells of the pond snail lymnaea stagnalis
… were performed on the isolated brain of Lymnaea stagnalis. FMlRFamide resulted in significant inhibition of spike frequency. This response was variable, and this was attributed to seasonal differences within snail neurotransmitter content. ACh also exhibited a trend that was attributed to …
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Elucidation of the Retinoid Signalling Pathway Involved in Axon Guidance in Lymnaea stagnalis and Xenopus laevis
… of regenerating motorneurons of the pond snail, Lymnaea stagnalis. Our lab has recently shown that RA can induce this morphological response independent of nuclear transcription, however, the role of the retinoid receptors in RA-induced chemoattraction is still unknown. Here, I show that the …
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Mitochondrial Dynamics Imbalance as a Potential Driver of Neuronal Decline in the Aging Nervous System of Lymnaea stagnalis
… the central nervous system. Using the pond snail Lymnaea stagnalis as an invertebrate model of neuronal aging, the general hypothesis that disruption of mitochondrial fission–fusion balance contributes to neuronal dysfunction during aging was examined. The findings demonstrate that normal brain …
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Identification and characterization of retinoic acid-induced morphological and electrophysiological changes in an invertebrate nervous system
… utilizing cultured neurons from the pond snaa Lymnaea stagnalis, has shown that RA can elicit a regenerative response, growth cone turning, independently of "classical" transcriptional activation While this work illustrates a novel regeneration-inducing effect in culture, it is currently …
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Retinoic Acid and the Underlying Cellular Mechanisms involved in Neurite Outgrowth and Growth Cone Turning during Regeneration
… guide neurite outgrowth. Cultured neurons of the Lymnaea central nervous system (CNS) have previously been used to investigate the role of RA in neurite outgrowth and growth cone guidance. Recently however, a novel phenomenon has been identified, in which neurite outgrowth occurs from cut nerves …
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Neurobiological Substrates of Age-Associated Decline in Neuronal Excitability - Lipid Peroxidation-Dependent Modulation of Transient Potassium Current Inactivation?
… excitability decline in the model system Lymnaea stagnalis, investigate the ionic mechanisms underlying this dysfunction with a focus on voltage gated potassium channels, and seek to implicate oxidative stress and lipid peroxidation with the aging process in these neurons.
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Systematics, diversity, and origins of upper cretaceous continental molluscan fauna in the infra- and intertrappean strata of the Deccan Plateau, central India
… and modern related species. Three new species (Lymnaea pokhariensis, Bellamya lattooformis, and Zootecus burji) and four new subspecies (Tricula conoidea conoidea, T. c. hislopi, Valvata unicarinifera unicarinifera, and V. u. chiknaformis) were identified and described. Three families with their …
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Living and Recent Dead Milluscan Assemblages Upper Lasalle Lake, Minnesota
… exacuous, Helisoma campanulatum, Physa integra, Lymnaea stagnalis jugularis and Amnicola lustrica – had densities which generally decreased from 1 to 3 m and increased from 4 to 6 m, except at a sampling station where sediment was being moved to 3 m and the largest fossil densities also occurred …
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The heteromeric 5-HT3A/B receptor:the effect of 5-HT3B subunits on receptor structure and ligand recognition
… the soluble acetylcholine binding protein, from Lymnaea stagnalis, as templates. These homology models were used, together with equivalent models constructed for the homomeric receptor, to interpret mutagenesis experiments designed to explore the minimal recognition differences of both the …
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Investigating the Role of MicroRNAs in Regeneration and Axonal Pathfinding
… during CNS regeneration of the pond snail, Lymnaea stagnalis. Specifically, I determined the expression patterns and relative abundance of microRNAs in the regenerating CNS in response to retinoic acid (RA). Using miRNA-Sequencing, I identified one neuronally enriched microRNA, miR-124, that …
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Freshwater snail diversity in relation to Schistosomiasis in the middle Zambezi basin in Lusaka Province
… Segmentorbis angustus, Gyraulus costulatus, Lymnaea natalensis, Physa acuta and Ferrissia burnupi burnupi. The prosobranch species consisted of Bellamya cappillata, Cleopatra nsendwensis, Gabbiella kisalensis, Gabbiella sp, Lanistes ovum and Melanoides tuberculata. Linear regression was used …
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Calcium, actin and the spectrin skeleton: Responses to swelling and shrinking perturbations.
… F-actin is related to VLDs were initiated. In Lymnaea neurons that had swelled then reshrunk to form VLDs, F-actin rapidly reorganized around the VLDs. At the substrate, F-actin formed rings of newly constituted leading edge (filopodia and lamellipodia) that we termed actipodia. Microinjection …
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Studies on the biology of Plagiorchis elegans (Rudolphi, 1802), (Trematoda: Digenea) in its mammalian and molluscan hosts
… The life cycle was initially established using Lymnaea stagnalis, Chironomus sp.larvae and LACA mice; morphology, intraspecific variation and host specificity at all levels of the life cycle have been examined and described. Besides L.stagnalis, L.palustris is susceptible to infection with …
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Evaluating the emerging environmental risks of mycotoxins in freshwater ecosystems.
… platyurus, cnidarians Hydra vulgaris, molluscs Lymnaea stagnalis (embryos) and Protozoa Tetrahymena thermophila. The resulting inhibition values in terms of growth, immobilisation survival or reproduction demonstrated DON poses the greater toxic hazard to crustaceans, whereas ZON was most toxic …
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Mitochondria and Fatty Acid Homeostasis in the Aging Nervous System
… of aging. Using the gastropod model system Lymnaea stagnalis, the general hypothesis that deregulation of lipid homeostasis contributes to neuronal and behavioural impairment is investigated. Briefly, evidence is provided for the following ideas. 1) Neurons do not generally rely on lipids to …
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Holocene Mollusks of the Knife and Heart Rivers, Southwestern North Dakota
… crista (Linnaeus, Stagnicola caperata (Say), and Lymnaea stagnalis (Linne) indicate that most of the fossil sediments studied were deposited in a pond or slow-water environment.</p> <p>The fossil terrestrial gastropods do not indicate any different environments than those found presently on the …
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Computer vision enabled approaches to predicting responses to fluctuating temperatures in aquatic embryos
… to assess how embryos of the great pond snail, Lymnaea stagnalis, develop differently under constant and diurnally fluctuating temperatures, and the extent to which TPCs based on performance in CTs can describe embryonic responses to FTs, not just for single endpoints but throughout embryonic …
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FACTORS CONTROLLING NICKEL BIOAVAILABILITY AND EFFECTS ON BENTHIC INVERTEBRATES IN HARDWATER FRESHWATER STREAMS
… were observed. Finally, <i>H. azteca</i> and <i>Lymnaea stagnalis</i> were exposed to a series of tests involving singular or combinations of Ni amendments to water, sediment, and food (stable isotope <sup>62</sup>Ni) with dissolved organic carbon (DOC), total suspended solids (TSS) water …
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