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 16 of 16 for “"nutrient transfer"”.
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New Tools to Understand Mechanisms of Nutrient Transfer from Plants to Biotrophic Pathogens
… the pathogen can secrete effectors and acquire nutrients needed for successful colonization and reproduction. These cells are difficult to isolate due to their limited number and ephemeral nature. I have developed a method to isolate the translatome (i.e., mRNAs associated with ribosomes) of …
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Terrestrial-Aquatic Linkages: Watershed (Geologic and Vegetation) Runoff Influences on Primary Production of a Sub Alpine Lake
Nutrient transfer via runoff from terrestrial to aquatic ecosystems has the potential to enrich aquatic productivity and change algal composition. There has been increased cultural eutrophication of fresh water bodies from increased combustion and atmospheric deposition of nutrients, land …
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Trojan horses in the marine realm: characterizing protistan parasite ecology in coastal waters
… 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, processes that both contribute …
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Trojan Horses in the Marine Realm: Characterizing Protistan Parasite Ecology in Coastal Waters
… 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, processes that both contribute …
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Potential of thermophilic bioleaching, effect of temperature on the process performance
… thermophilic organisms. Bioleaching. involves nutrient transfer to microorganisms and interactions between several ionic species, including iron and sulphate. Thus, it is necessary to investigate the effect of the increased temperature on the gas-liquid mass transfer as well as ionic speciation …
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An ultrastructural study of gametogenesis and early development in the sea anemone <i>Actinia fragecea</i> (Cnidaria : Anthozoa)
… forming the trophonema, which is involved with nutrient transfer. The gonad epithelium can take up nutrients from the external medium, and the trophonema is particularly active in the uptake and incorporation of some small molecules. Not all fully grown oocytes are always spawned; some break …
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Continuum models for fungal growth
… species have major roles in decomposition and nutrient cycling in the soil; some form vital links with plant roots allowing nutrient transfer. Other species are essential to industrial processes: citric acid production for use in soft drinks; brewing and baking; treatment of industrial effluent …
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Mechanics of biomimetic materials for tissue engineering of the intervertebral disc
… deformation---facilitating shock absorption and nutrient transfer---and strong material anisotropy and tensile-compressive nonlinearities---providing flexibility in controlled directions. In this work, frameworks for the design of materials with controllable structure-property relationships are …
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Biological control of internal decay in creosoted distribution poles
… this was not limited by pole moisture contents. Nutrient transfer was not found to take place from soils to poles. Pole age, decay status and presence of previous remedial treatment did not seem to prohibit <i>Trichoderma </i>establishment which was shown to be present in over 90% of poles …
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A METE mutant of Chlamydomonas reinhardtii provides new perspectives on the evolution of vitamin B12 auxotrophy
… M. loti respectively, revealing that the rate of nutrient transfer between species was the factor limiting growth. It was unsurprising therefore that when grown in triculture, the wild type soon outcompeted metE7, even when M. loti growth and B12 production were fuelled by added glycerol. B12 …
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The role of the Igf2/H19 locus in regulating murine placental endocrine capacity
The placenta is responsible for materno-fetal nutrient transfer and produces an abundance of hormones and signalling factors that adapt maternal metabolism to support fetal growth. In mice, these functions are performed in two distinct placental regions, the transport labyrinth zone (Lz) and the …
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Genetic polymorphism of alpha s1-casein. Feeding strategies to optimize productive performances of dairy goat with different genotype.
… factors occurs, thus affecting the efficiency of nutrient transfer into milk. Our results suggest that in a free choice feeding system goats are able to select a diet according to their genetic aptitude to produce casein. In particular, besides the genotype, the energy requirements were …
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Clinico-Chemical Parameters of Fetal Fluids and Maternal Blood in the Bovine Model: Effects of Genetics and Sex and Relationships with Feto-Placental Phenotype
… a paternal influence on amniotic fluid water and nutrient transfer. Conceptus sex and genetics affected maternal physiology in a maternal genetics dependent manner by influencing key parameters of maternal mineral metabolism, liver function and thyroid status. In conclusion, this study provides …
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SEASONAL VARIATION IN ROTIFER OCCUPANCY WITHIN FRULLANIA EBORACENSIS LOBULES: ILLUMINATING A SYMBIOTIC RELATIONSHIP BETWEEN TWO OVERLOOKED SPECIES
… that rotifer excrement might be a source of nutrients for <em>F. eboracensis</em>. My goals were to 1) investigate how rotifers are distributed among <em>F. eboracensis</em>, 2) how rotifer abundance is impacted by seasonality, and 3) use quantum dot (QD) labeled <em>Escherichia coli</em> as …
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Particle tracking for understanding the properties and dynamics of bacterial biofilms
… the biofilm, which may be important for nutrient transfer through the system. This methodology provides significant insight into a particular biofilm system and can be applied to many others to provide comparisons of biofilm structure. The elucidation of structure provides evidence for …
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An investigation of some key physico-chemical water quality parameters of an Integrated Multi-Trophic Aquaculture (IMTA) system operating recirculation methodology in the Western Cape of South Africa
… to researchers are mechanisms and dynamics of nutrient transfer between components of the system and how these could be manipulated to increase efficiency and reduce running cost of farms. This work was conducted to try and quantify some of the changes in some physical and chemical …