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 28 for “"Protist"”.
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Effects of Infection of the Protist Parasite, Dermomycoides sp., in Dusky Gopher Frog Tadpoles
<p>Infections of the protist parasite, <em>Dermomycoides</em> sp. are thought to have caused several years of low recruitment in the dusky gopher frog (<em>Rana sevosa</em>) populations. I evaluated the effects of density of the infective zoospores, host developmental stage, and tadpoles' ability …
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A MARINE PATHOGENIC PROTIST ACROSS SCALES: HOST-MICROBIOME INTERACTION, PROVENANCE, MORPHOLOGY AND TAXONOMICAL CHARACTERIZATION OF THE SCUTICOCILIATE PARASITE OF DIADEMATIDAE
… dissertation advances understanding of marine protistan disease ecology, highlights the value of integrative diagnostics and archival material, and provides a taxonomic foundation for future studies on ciliate pathogen-host dynamics in coral reef ecosystems.
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Recoding and reassignment in protists
… provide evidence of novel decoding mechanisms in protists, as identified through bioinformatics analysis. To begin with I analysed the genomes of two ciliate species, Euplotes crassus and E. focardii. In combination with the analysis of E. crassus transcriptome using ribosome profiling, I …
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Effects of competition, disturbance and productivity on the dynamics of inducible trophic polymorphism in tetrahymena vorax
… of competition. The freshwater ciliated protist Tetrahymena vorax was found to have three distinct phenotypic morphs with two trophic levels. Its carnivorous macrostomes consume intraspecific competitors and its bacterivorous pyriform microstome morph and tailed microstome morph …
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Efforts to elucidate functional and regulatory aspects of gene expression in Trichomonas vaginalis
… I explored suitable molecular tools for this protist. First, I showed that iLOV, an oxygen-independent fluorescent protein from Arabidopsis thaliana, outperforms the conventional enhanced green fluorescent protein. With a faster maturation rate and stronger fluorescence intensity, iLOV can …
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Trojan horses in the marine realm: characterizing protistan parasite ecology in coastal waters
Protists are taxonomically and metabolically diverse drivers of energy and nutrient flow in the marine environment, with recent research suggesting significant roles in global carbon cycling throughout the water column. Top-down controls on planktonic protists include grazing and parasitism, …
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Trojan Horses in the Marine Realm: Characterizing Protistan Parasite Ecology in Coastal Waters
Protists are taxonomically and metabolically diverse drivers of energy and nutrient flow in the marine environment, with recent research suggesting significant roles in global carbon cycling throughout the water column. Top-down controls on planktonic protists include grazing and parasitism, …
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Microbial diversity of a nature reserve: eukaryotic microorganisms of Mere Sands Wood in N.W. England
… diversity and distribution using traditional protist taxonomy based on morphology. The methods employed were similar to that adopted in the studies of macroscopic organisms, allowing for a comparison between the diversity of microscopic and previously studied macroscopic organisms.The results …
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Identification of TbRP2-interacting proteins using proximity-dependent biotinylation (BioID)
… been studying RP2 function in the flagellated protist Trypanosoma brucei, a tractable model to study eukaryotic flagellum assembly but also a parasite of medical and veterinary importance in subSaharan Africa. Thus, the study of RP2 in trypanosomes has relevance for parasitology, but also the …
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The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
… in Vineyard Sound seawater to 105.4 and 105.5 in protist cultures, indicating that "grazer-enhanced" DOM was a better sorbent for PCBs than DOM in bacterial controls and Vineyard Sound seawater.
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Ciliate micrograzer dynamics of the New England Shelf
Protists play important roles in grazing and nutrient recycling, but quantifying these roles has been hindered by difficulties in collecting, culturing, and observing these often-delicate cells. During long-term deployments at theMartha’s Vineyard Coastal Observatory (MVCO) (Massachusetts, USA), …
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Bacterial biodegradation of soluble crude oil hydrocarbons and the influence of protists in simulated arctic seawater and sea ice
… occur in Arctic marine waters. The influence of protists on bacterial biodegradation of water accommodated fractions (WAF) of petroleum hydrocarbons is unknown, yet important because it could enhance or hinder biodegradation.</p><p>The objectives of this research were to calculate biodegradation …
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Cloning and characterization of a novel ferritin from the marine diatom Pseudo-nitzschia multiseries
… include centric diatoms, brown algae and some protist plant parasites) or Cryptophyte relatives. Members of this genus readily bloom upon addition of iron to Fe-limited waters, and are known to produce the neurotoxin domoic acid. Until now, the reason for the success of pennate diatoms in the …
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The Effects of Synthetic and Naturally Occurring Compounds on Microsporidian Infection in Insects
Microsporidia are intracellular, protist parasites infecting many animals, including insects and humans. There are currently no drugs available to cure microsporidiosis. In this thesis, I describe my work examining the effects of phytochemicals and pharmaceutical drugs on microsporidian infection …
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Ecological forces affecting microbial eukaryotes in the coastal ocean
Marine microbial eukaryotes (protists) play a central role in the global biogeochemical cycles. Protist communities comprise carbon-fixing eukaryotic phytoplankton, which comprise the base of the marine food web, heterotrophic protists, which are predators of other microbes, and mixotrophs, which …
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Ciliate micrograzer dynamics of the New England shelf
Protists play important roles in grazing and nutrient recycling, but quantifying these roles has been hindered by difficulties in collecting, culturing, and observing these often-delicate cells. During long-term deployments at the Martha's Vineyard Coastal Observatory (MVCO) (Massachusetts, USA), …
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Functional Analysis of Dehydratase Domains of a Polyunsaturated fatty acid Synthase from Thraustochytrium sp. by Mutagenesis
… Thraustochytrium sp. ATCC 26185 is a marine protist that can produce large amounts of VLCPUFAs such as DHA and DPA (docosapentaenoic acid, 22:5-4,7,10,13,16) for human food and animal feed. Biosynthesis of these fatty acids in Thraustochytrium is catalyzed by a polyunsaturated fatty acid …
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Proteomic, Bioinformatic and Functional Characterization of the Nuclear Pore Complex of the African Trypanosome
… relative to yeast and vertebrates. The parasitic protist Trypanosoma brucei is a suitable candidate for such a study due to its sequenced genome and experimental tractability, compared to other protists. In this thesis, we present the comprehensive analysis of the protein components of the …
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