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 60 for “"environmental signals"”.
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Environmental Signals in Satellite Altimeter Data
… between satellite radar altimeter data and and environmental activity over land surfaces. Variations in height and sigma0 data sets are both considered with the first stages being investigations into the reliability of the altimeter data over land. The accuracy of the height data eis considered …
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Environmental signals that control T lymphocytes in the gastrointestinal tract
The Aryl Hydrocarbon Receptor Nuclear Translocator (ARNT) binds the Aryl Hydrocarbon Receptor (AHR) and also the Hypoxia Inducible Factor-1α (HIF-1α). Both the AHR and HIF-1α are key sensors of the microenvironment. Dietary tryptophan metabolites and microbiota catabolites are AHR ligands and …
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The Effects of Host-like Environmental Signals and Gene Expression on Capsule Growth in Cryptococcus neoformans
… all possible combinations of 4 capsule-inducing signals on gene expression, cell size, and capsule size. These signals are medium (YPD, DMEM or RPMI), temperature (30°C or 37°C), CO<sub>2</sub> (room air or 5%), cAMP (0 mM or 20 mM), and pH buffer (HEPES/no HEPES). We explore the effects of …
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Stomatal sensitivity to photosynthetic and environmental signals in glycine max grown at elevated atmospheric concentrations of CO2 and O3
… (gs). gs is highly regulated in response to environmental factors and a key determinant of plant carbon gain, water use and ozone uptake. The Ball, Woodrow and Berry (1987, Progress in Photosynthetic Research, vol IV, 221-224) model of stomatal conductance is a central component of ecosystem …
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Regulation of nitrogen fixation in Klebsiella pneumoniae: NifL, one protein transducing two environmental signals to the nif-transcriptional activator NifA
Klebsiella pneumonia moduliert NifL die Aktivität des Transkriptionsaktivators NifA in Abhängigkeit der Umweltsignale Stickstoff und Sauerstoff. NifL ist ein Flavoprotein, welches das Sauerstoffsignal wahrscheinlich durch einen redoxsensitiven Konformationswechsel transduziert. Wir haben die …
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Mechanisms of Transcriptional Control by the Mediator Complex Subunit Cdk8
… transcription factors in response to environmental signals. However, the full extent of all Cdk8 substrates and the mechanisms by which Cdk8 itself is regulated are not completely understood. As a cyclin-dependent kinase, partial Cdk8 activation in vitro requires interaction with CycC, …
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Environmentally Influenced Duplication Patterns Followed by Functional Shifts Fueling the Evolution of Metazoan Sensory Systems
… allows for an expansion in the number of environmental signals the animal can detect. In the following chapters, some of the ways gene duplication has effected sensory perception have been shown in detail, in particular by the expansion and specialisation of sensory receptor repertoires. …
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<em>Actinobacillus pleuropneumoniae</em> ApxI and ApxII Toxin Regulation
… their role in disease and elucidate the environmental signals and genes that affect their production during infection. The goal of this project was to examine environmental signals that could be involved in regulation of the Apxl and ApxII toxins. To pursue this goal, toxin production was …
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Cloning and characterisation of a bZIP transcription factor from a resurrection grass, Eragrostis nindensis
… of gene expression in response to a range of environmental signals including anaerobiosis, dehydration and light as well as by abscisic acid (ABA). Basic leucine zipper (bZIP) transcription factors have been shown to specifically bind and activate transcription from G-boxes in a dimerized …
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The Characterization of Quorum Sensing E. Coli Regulators E,F, and G (Qse EFG) and Their Role in Pathogenesis
… including the AE lesion genes in response to environmental signals. Utilizing these signals allows EHEC to colonize the intestine efficiently and effectively. Environmental signals are often recognized by bacterial sensor kinases. In response to cognate signals, sensor kinases …
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Characterizing the Role of the Type VI Secretion System in Interbacterial Species Interactions and Pathogenesis
… to a changing environment and yet, the role of environmental signals and their influence on interspecies interactions and the expression of the T6SS, remain largely unknown. Here, I examined the role of the T6SS in the context of multispecies communities. Using a mix of two antagonistic T6SS …
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Streptococcal colonization of host mucosal surfaces: a study of biofilm formation and dispersal
… numerous factors in rapid response to host and environmental signals in order to facilitate attachment, replication, and eventual dispersal (dissemination). Experimental evidence suggests that GAS forms biofilms during the colonization of a surface. A biofilm is a bacterial sessile community …
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A bacterial biofilm study: from molecular regulation mechanisms in Escherichia coli to the role of biofilms in mammalian colon cancer development
… developmental process regulated by multiple environmental signals. In addition to other nutrients, the transition metal iron can also regulate biofilm formation. Iron-dependent regulation of biofilm formation varies by bacterial species, and the exact regulatory pathways that control …
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A small RNA regulates RpoS in the Lyme disease spirochete Borrelia burgdorferi
… OspC and OspA. Temperature is one of the key environmental signals controlling RpoS, but the molecular mechanism by which the signal is transduced remains unknown. DsrABb post-transcriptionally regulates the alternative sigma factor RpoS in response to an increase in temperature, associated …
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A small RNA regulates RpoS in the Lyme disease spirochete Borrelia burgdorferi
… OspC and OspA. Temperature is one of the key environmental signals controlling RpoS, but the molecular mechanism by which the signal is transduced remains unknown. DsrABb post-transcriptionally regulates the alternative sigma factor RpoS in response to an increase in temperature, associated …
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Flowering Gene Homologs Regulate Seasonal Growth Changes in Poplar
… climates depends on their ability to respond to environmental signals that are markers of seasonal changes in order to survive winter and maximize growth. The genus Populus (poplars) is a model system for identifying the genes and molecular mechanisms that regulate growth and dormancy …
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Engineered E. Coli That Detect and Respond to Gut Inflammation Through Nitric Oxide Sensing
… use of DNA recombinases to translate transient environmental signals into permanent responses in engineered bacteria.
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Multiple Posttranscriptional Regulatory Features Control Expression of Ethanolamine Utilization Genes In Enterococcus Faecalis
… My data show a unique mechanism by which two environmental signals are integrated by two different posttranscriptional regulators to regulate a single locus.</p> </p>
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Chromatin Control of the Antiviral Response to Influenza
… the cell is able to integrate and respond to environmental signals. However, a consequence of this is that any artificial or naturally occurring molecule that "mimics" the histone tails has the potential to strongly impact gene function and the cell's response to the environment. Indeed, we …
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Role of Striatin Complexes in the Control of Development and Secondary Metabolism of the Filamentous Fungus Aspergillus nidulans
… complexes which are under control of the environmental signals such as light, CO2 and pH . Aspergillus nidulans is a model for eukaryotic systems as well as fungal development and SM. It produces more than forty identified compounds with potent biological activities. Function of the …
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