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.
Results
Showing 1 to 13 of 13 for “"Microbial biofilms"”.
-
Effects of Light and Macroinvertebrate Consumers on Detrital Microbial Biofilms in Streams
… aquatic macroinvertebrates are key processors of biofilms that grow upon organic matter. Although macroinvertebrate effects on biofilms may depend on light availability, the combined effects of consumers and light remain unexplored. Here, I conducted experiments to test effects of presence/absence …
-
Processes and community structure in microbial biofilms of the River Elbe: relation to nutrient dynamics and particulate organic matter
… of this study was to investigate the effects of microbial biofilms of the hyporheic zone of the river Elbe on nutrient dynamics and elimination. This resulted in four aspects, which were carried out separately. One aspect was the investigation of the dynamics of inorganic nitrogen compounds in …
-
Understanding the selective permeability of biological hydrogels
… hydrogels are fundamental to life, from microbial biofilms to mucus and the nuclear pore in humans. These hydrogels exhibit complex selective permeability behavior, allowing the passage of some particles while blocking the penetration of others. This selective permeability is critical for …
-
Population and evolutionary dynamics during microbial range expansions
… range of a species to the growth of tumors and microbial biofilms. In ecology, range expansions are becoming more frequent due to environmental changes and rare long distance dispersal, often facilitated by anthropogenic activities. Simple models in theoretical ecology explain many emergent …
-
Microbial activity on wood in streams: exploring abiotic and biotic factors affecting the structure and function of wood biofilms
In this examination of microbial colonization of wood and factors affecting the structure and function of wood biofilms in streams, the first two chapters summarize research conducted in New Zealand and compare the composition of biofilm colonizing wood to that colonizing rocks and leaves. Similar …
-
Mathematical Models of Biofilm in Various Environments
Microbial biofilms are defined as clusters of microbial cells living in self-produced extracellular polymeric substances (EPS), which always attached to various kinds of surfaces. In this thesis, we studied several mathematical models of biofilm in the human body and marble environment. Some …
-
Development of a seeding pellet system for use in soil conservation forestry
… a substrate, with pill capsules as containers or microbial biofilms and organic materials as binding agents. The trial was screened for both germination and plant height to discern whether the various pellet constructions interfered with or lowered germination rates as well as to study differences …
-
Chemical Processes That Govern the Natural Attenuation of Microbial Signals: Environments That Simulate Photosynthetic Biofilms
<p>Microbial quorum sensing is a form of chemical communication that is dependent on transmission of molecular signals through the environment. Complex molecular structures, including molecules used in microbial communication, are degraded in the environment through a manifold of reactions …
-
Using high throughput data to understand microbes and their interaction with the environment
… used to understand the order of colonization of microbial biofilms. Available metagenomic sequencing data from infant fecal samples collected for 2.5 years was queried to test whether or not the gut colonization process is a multi-step process, in which the organisms that are prevalent at a given …
-
Diversity and activity of aerobic thermophilic carbon monoxide-oxidizing bacteria on Kilauea Volcano, Hawaii
… for geothermal sites including two soils and two microbial biofilms at the Puhimau geothermal area and Kilauea Iki crater. CO oxidation occurred at elevated temperatures for all sites assessed; however, cardinal temperatures for CO activity were not strongly correlated to in situ temperatures. …
-
The physical, environmental, and evolutionary determinants of biological architecture
… 3 and 4 we further investigate these features in microbial biofilms which exhibit rich spatial patterning. Using a mathematical model and experimentation we find that the tall vertical structures produced by these biofilms have optimal geometry for resource uptake and the growth efficiency of the …
-
Dental caries prophylaxis with photosensitizers (experimental, laboratory and clinical studies) // Профилактика на зъбния кариес с фотосенсибилизатори (експериментални, лабораторни и клинични изследвания)
… of the human population. Diseases related to microbial biofilms are one of the most prevalent bacterial diseases in humans. The process of destruction of hard dental tissues due to dental caries is part of these conditions of disturbed ecological balance. The role of Mutans Streptococci (MS) …