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Tesi sul tema "Microbial ecology"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Barberán, Torrents Albert. "Microbial Macroecology understanding microbial community pattems using phylogenetic and multivariate statistical tools." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/101511.

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El estudio de los microorganismos en cultivo puro ha propiciado el desarrollo de la genética, la bioquímica y la biotecnología. Sin embargo, la ecología ha permanecido reticente a incorporar a los microorganismos en su acervo teórico y experimental, principalmente debido a las dificultades metodológicas para observar a los microbios en la naturaleza, y como resultado de los caminos divergentes que han trazado las disciplinas de la microbiología y la ecología general. Esta tesis trata de demostrar que los patrones ecológicos de comunidades microbianas son susceptibles de ser analizados mediante

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2

Yates, Philippa Dawn. "Microbial ecology of windrow composting." Thesis, University of Hull, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418762.

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3

夏江瀛 and Kong-ying Ha. "Microbial ecology of arid environments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/193421.

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Abstract (sommario):

Deserts comprise the largest terrestrial biome, making up approximately one third of the Earth’s land mass. They are defined in terms of moisture deficit using the Aridity Index with values <1. A further delineation based on mean annual temperatures into hot (>18°C), cold (<18°C) and polar (<0°C) deserts is employed. In the absence of significant macrobiota, microorganisms are key to desert ecosystems. They are located in near-surface soils, and include a widespread hypolithic mode of colonization, where microbial biomass develops on the ventral surfaces of quartz and other translucent stones.

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4

Fraraccio, Serena <1986&gt. "Microbial ecology of biotechnological processes." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6913/1/Fraraccio_Serena_tesi.pdf.

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The investigation of phylogenetic diversity and functionality of complex microbial communities in relation to changes in the environmental conditions represents a major challenge of microbial ecology research. Nowadays, particular attention is paid to microbial communities occurring at environmental sites contaminated by recalcitrant and toxic organic compounds. Extended research has evidenced that such communities evolve some metabolic abilities leading to the partial degradation or complete mineralization of the contaminants. Determination of such biodegradation potential can be the starting

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5

Fraraccio, Serena <1986&gt. "Microbial ecology of biotechnological processes." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6913/.

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Abstract (sommario):

The investigation of phylogenetic diversity and functionality of complex microbial communities in relation to changes in the environmental conditions represents a major challenge of microbial ecology research. Nowadays, particular attention is paid to microbial communities occurring at environmental sites contaminated by recalcitrant and toxic organic compounds. Extended research has evidenced that such communities evolve some metabolic abilities leading to the partial degradation or complete mineralization of the contaminants. Determination of such biodegradation potential can be the starting

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6

Santos, Anderson Secco dos [UNESP]. "Condicionamento de um subsolo exposto no cerrado por meio de resíduos e da revegetação." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/138448.

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Made available in DSpace on 2016-05-17T16:51:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-08-14. Added 1 bitstream(s) on 2016-05-17T16:54:58Z : No. of bitstreams: 1 000864109.pdf: 2175142 bytes, checksum: fff8a8ccb57c55f7ae5759469cbc46dd (MD5)<br>Para que um subsolo exposto tenha restabelecido, mesmo que parcialmente, a dinâmica de seus atributos na camada superficial e, com isto, apresente condições para receber e dar suporte à vegetação de cerrado é necessário a utilização de técnicas específicas. Para acelerem esta etapa uma alternativa seria a introdução de resíduos, como as

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7

Santos, Anderson Secco dos. "Condicionamento de um subsolo exposto no cerrado por meio de resíduos e da revegetação /." Ilha Solteira, 2015. http://hdl.handle.net/11449/138448.

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Orientador: Ana Maria Rodrigues Cassiolato<br>Co-orientador: Kátia Luciene Maltoni<br>Banca: Renato Alberto Momesso Franco<br>Banca: Carolina dos Santos Batista Bonini<br>Resumo: Para que um subsolo exposto tenha restabelecido, mesmo que parcialmente, a dinâmica de seus atributos na camada superficial e, com isto, apresente condições para receber e dar suporte à vegetação de cerrado é necessário a utilização de técnicas específicas. Para acelerem esta etapa uma alternativa seria a introdução de resíduos, como as macrófitas aquáticas removidas das águas de represas de usinas hidrelétricas, como

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8

Louca, Stilianos. "The ecology of microbial metabolic pathways." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59313.

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Abstract (sommario):

Microbial metabolic activity drives biogeochemical cycling in virtually every ecosystem. Yet, microbial ecology and its role in ecosystem biochemistry remain poorly understood, partly because the enormous diversity found in microbial communities hinders their modeling. Despite this diversity, the bulk of global biogeochemical fluxes is driven by a few metabolic pathways encoded by a small set of genes, which through time have spread across microbial clades that can replace each other within metabolic niches. Hence, the question arises whether the dynamics of these pathways can be modeled regar

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9

Wong, Ka-yu, and 黃家愉. "Molecular ecology of lithic microbial communities." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43703951.

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10

Simmons, Susan. "The microbial ecology of acidic environments." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/58964/.

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The microflora of two acidic environments was investigated using analysis of 16S rDNA amplified by the polymerase chain reaction (PCR) from environmental DNA. These environments had different chemical characteristics from most of the acidic environments studied by others. The first sample site, a coal spoil (Birch Coppice, Warwickshire), might have been expected to produce niches enriched in humic matter. The second, comprising geothermal vents on the Island of Vulcano, was unusual for natural acidic environments since it was saline. Three vent regions of different temperatures (30°C, 45°C and

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11

Hoy, Christine Muriel. "The microbial ecology of necrotising enterocolitis." Thesis, University of Aberdeen, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400663.

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Abnormal gastrointestinal colonisation has been implicated in the development of necrotising enterocolitis (NEC). Organisms capable of rapid fermentation of excess carbohydrate in the small bowel were postulated to produce adverse intraluminal conditions leading to intestinal injury. Quantitative culture of duodenal aspirates from 122 very low birth weight newborns revealed a high prevalence of Gram-negative colonisation, with counts up to 10<sup>8</sup> cfu/g. Gram-negative colonisation occurred in infants who had been fed, increased with postnatal age and was associated with a longer stay

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12

Panas, Panayiotis. "Molecular microbial ecology of organophosphonate degradation." Thesis, University of Ulster, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414100.

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13

Oates, Angela. "The microbial ecology of chronic wounds." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/the-microbial-ecology-of-chronic-wounds(54e6dce0-cffa-4f03-9701-7bc1ea907af9).html.

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Within the five experimental chapters of this doctoral thesis (i) the eubacterial diversity of the microbiota of chronic wounds and healthy skin was investigated, (ii) biofilm formation and associated coaggregation interactions of wound and skin-associated bacterial isolates was examined, (iii) formulation of media which reproduced some aspects of the nutritional conditions of wounds and healthy skin were developed, (iv) novel wound biofilm models were developed and validated and (v) microbial population interactions associated with healthy skin and chronic wounds were investigated using a nov

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14

Mwatha, Wanjiru Elizabeth. "Microbial ecology of Kenyan soda lakes." Thesis, University of Leicester, 1991. http://hdl.handle.net/2381/35400.

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A combination of geological, geographical and climatic conditions; favour the evolution of stable alkaline environments, such as the soda lakes of East African Rift Valley. These lakes are often saline as well as alkaline. Soda lakes are potentially the best sources of alkaliphilic microoganisms, but they are virtually unexplored. The few studies done indicate that soda lakes have very high primary productivity, due to the dense population of phototrophic microorganisms, either cyanobacteria or phototrophic eubacteria or both. Soda lakes are therefore, likely to support a large population of o

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15

Wong, Ka-yu. "Molecular ecology of lithic microbial communities." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43703951.

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16

Korin, Tetyana Olegivna. "Microbial ecology of anaerobic biodegradation of benzoate : microbial communities and processes." Thesis, University of Newcastle upon Tyne, 2018. http://hdl.handle.net/10443/4138.

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Abstract (sommario):

Microbial conversion of hydrocarbons and other aromatic compounds has been studied extensively under various electron accepting conditions, by investigating cultured microorganisms and by using samples collected directly from diverse environments. However, the functions of the principal microbial organisms taking part in the biodegradation process are not fully understood, especially when the organisms comprise complex microbial communities. The focus of the research reported here is the identification of a microbial community enriched during methanogenic benzoate degradation using inocula fro

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17

Mikucki, Jill Ann. "Microbial Ecology of an Antarctic Subglacial Environment." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/mikucki/MikuckiJ1205.pdf.

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The research presented in this dissertation focused on the microbial ecology of the subglacial discharge from the Taylor Glacier in the McMurdo Dry Valleys, Antarctica. The major objectives of my research were to 1) define the biogeochemistry of the subglacial outflow 2) describe the microbial diversity of the subglacial outflow and 3) examine the impact of subglacial outflow on the geochemistry and biology of the west lobe of Lake Bonney, a lake that abuts the glacier. The subglacial outflow from the Taylor Glacier is known as Blood Falls owing to a visible accumulation of iron-oxides at the

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18

Encarnacion, Gem Deangkinay. "Microbial ecology of nitrifying simulated premises plumbing." Diss., Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/encarnacion/EncarnacionG0512.pdf.

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Because of the Stage 2 Disinfectants and Disinfection Rule limiting then concentration of disinfection by products in drinking water, the use of chloramine as an alternative to chlorine has been increasing. However, the ammonia introduced by chloramination can lead to nitrification which results in the production of nitrite and nitrate, leading to regulatory violations. Nitrification in reactors with copper and polyvinyl chloride (PVC) surfaces was established by indigenous organisms from Bozeman tap water and has been stably maintained for more than 6 years. Statistical analyses of polymerase

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19

Marshall, Joanna. "The microbial ecology of the human foot." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328884.

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20

Bradshaw, Claire Elizabeth. "Molecular microbial ecology of hospital ward environments." Thesis, Sheffield Hallam University, 2013. http://shura.shu.ac.uk/19390/.

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Evidence indicates that the hospital environment plays a role in hospital acquired infections (HAI). Previous studies have focused on outbreaks and the role of specific culturable pathogens. There is still considerable debate about the role of the environment and the importance of cleaning, therefore more comprehensive culture-independent microbial ecology studies are required. This study aimed to utilise culture-independent methods to characterise the microbial communities in an orthopaedic ward and theatre environment under normal operating conditions, to determine the distribution of differ

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21

McGenity, Terence John. "Halobacterial phylogeny and salt mine microbial ecology." Thesis, University of Leicester, 1994. http://hdl.handle.net/2381/35396.

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Salt deposits are the remains of ancient hypersaline waters, which presumably supported dense populations of halophilic archaebacteria (halobacteria). Winsford salt mine in Cheshire exploits salt from the Triassic period (195-225 Ma), and Boulby potash mine in Cleveland, which is Permian (225-270 Ma) has been mined since 1973. Halobacteria were isolated in large numbers from brine pools, crusts of recrystallised salt and solution-mining brine, and were even occasionally isolated from rock salt, in both salt mines. Eubacteria from Winsford brine pools are the first described aerobic, non-photot

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22

Barton, Andrew David. "Trait-based approaches to marine microbial ecology." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/69465.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The goal of this thesis is to understand how the functional traits of species, biotic interactions, and the environment jointly regulate the community ecology of phytoplankton. In Chapter 2, I examined Continuous Plankton Recorder observations of diatom and dinoflagellate abundance in the North Atlantic Ocean and interpreted their community ecology in terms of functional traits, as inferred from la

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23

Roach, Ty Noble Frederick. "Nonequilibrium Thermodynamics, Microbial Bioenergetics, and Community Ecology." Thesis, University of California, San Diego, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10827422.

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<p> While it is clear that thermodynamics plays a nontrivial role in biological processes, exactly how this affects the macroscopic structuring of living systems is not fully understood. Thus, the objective of this dissertation was to investigate how thermodynamic variables such as exergy, entropy, and information are involved in biological processes such as cellular metabolism, ecological succession, and evolution. To this end, I have used a combination of mathematical modelling, <i>in silico</i> simulation, and both laboratory- and field-based experimentation. </p><p> To begin the disserta

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24

Travis, Emma Rachel. "Microbial ecology of soil contaminated with trinitrotoluene." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613973.

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25

Post, Richard D. "Decomposition and microbial ecology in roadside soils." Thesis, London South Bank University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334601.

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26

Monaghan, Emma M. "Microbial ecology of the sheep mammary gland." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/69096/.

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Intramammary infections (IMI) in sheep have a major economic impact through reduced milk production, premature culling and even death of ewes. This study hypothesizes that the sheep mammary gland could host a microbiome with certain members affecting SCC. Previous studies have been cross-sectional, using only one sample per subject and not conducted in sheep. This limits understanding causality; that is, how infection develops and what triggers development of disease. A longitudinal study of 30 sheep, each with two mammary gland halves, collected over 8 weeks, provided 379 milk samples and dat

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27

Clarke, Anna Maria. "The microbial ecology of sulphidogenic lignocellulose degradation." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1008181.

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Acid mine drainage is a well known environmental pollutant, not only in South Africa, but throughout the world, and the use of microbial processes in the treatment of these wastes has been the subject of investigation over past decades. Lignocellulose packed-bed reactors have been used in passive treatment systems, and, although effective initially, they show early decline in performance while the packing material remains largely un-utilized. Little is known about this phenomenon which remains a severe constraint in the development of efficient passive mine water treatment systems. It has been

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28

Hart, Murray. "Effects of pesticides on the soil microbial biomass and microbial activity." Thesis, University of Nottingham, 1995. http://eprints.nottingham.ac.uk/11542/.

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This thesis describes research investigating the side-effects of pesticides on soil microbial biomass and microbial activity, with particular reference to two recently developed pesticides, a fungicide, epoxiconazole, and a herbicide, quinmerac. In a dose-responsee xperiment,a pplication of thesep esticidest o a sandy loam soil, at up to 10 and 20 times field rate, had no significant effect on soil microbial biomass C or ninhydrin-reactive N, over 84 days incubation. There was also no effect on soil respiration, except for the higher rate quinmerac-treated soil, which evolved 13% lessC02-Cthan

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29

O'Flaherty, S. M. "Microbial diversity in contaminated soil." Thesis, Cranfield University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274042.

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30

Rao, Subramanya. "Microbial ecology of hot and cold desert soils." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49617667.

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Deserts are the most abundant terrestrial biome on Earth, and microbial processes assume a major role since environmental stress severely limits higher plant and animal life. A major hurdle to developing an understanding of microbial ecology in deserts has been the lack of knowledge at the fundamental biodiversity level. This is due to lack of research focus and also the inherent bias in ‘traditional’ microbial diversity estimates based upon cultivation. In this thesis an evaluation of culture-independent approaches employing both DNA and RNA from environmental samples was made with compariso

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31

Sacristán, Soriano Oriol. "Chemical and microbial ecology of thc demosponge Aplysina aerophoba = Ecología química y microbiana de la demosponja Aplysina aerophoba." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128858.

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Phylum Porifera (Grant, 1836) are sessile metazoans with a differentiated inhalant and exhalant aquiferous system with external pores. Lacking a tissue grade of construction, sponges can reach two well-differentiated regions, the ectosome (external layer free of choanocytes) and the choanosome (internal region with choanocytes). As the most likely primitive metazoans, their challenging structural organization, physiology for biocalcification and trophic requirements allowed sponges to rapidly colonize distinct environments and built important sponge reefs during the Paleozoic and Mesozoic eras

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32

Wepking, Carl. "Soil microbial function in a time of global change: effect of dairy antibiotics on soil microbial communities and ecosystem function." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/85125.

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Antibiotic resistance is ubiquitous due to high usage of antibiotics and the capability of bacteria to transfer genes both horizontally and vertically. While this has dire implications for human health, the potential to disturb microbial communities and ecosystem functions they regulate is under appreciated. Antibiotics are commonly used in the livestock sector, accounting for 80% of antibiotic use domestically. This dissertation addresses three facets of this problem. Chapter 2 is a nation-wide survey of antibiotic resistance at dairy operations, aimed at understanding how ecosystem function

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33

Fear, Lesley Anne. "Microbial ecology of the gut of Gammarus pulex." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250026.

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34

Coupe, Stephen John. "Oil biodegradation and microbial ecology within permeable pavements." Thesis, Coventry University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404727.

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35

Lenaerts, Jeremy. "Molecular beacons as hybridisation probes in microbial ecology." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493638.

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Microorganisms are of fundamental importance to global biogeochemical cycling, yet aspects of their ecology are poorly understood. Within the present methods used to study microbial ecology are limitations with regards to sensitivity, applicability and automation. This study aimed to investigate the potential application of novel nucleic acid probes (molecular beacons and locked nucleic acid probes) in microbial ecology.

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36

Enticknap, Julie Jane. "The microbial ecology of methanotrophs in agricultural soils." Thesis, University of Warwick, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340087.

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37

Olesen, Scott Wilder. "Quantitative modeling for microbial ecology and clinical trials." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107277.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Biological Engineering, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references.<br>Microbial ecology has benefited from the decreased cost and increased quality of next-generation DNA sequencing. In general, studies that use DNA sequencing are no longer limited by the sequencing itself but instead by the acquisition of the samples

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38

Sarma-Rupavtarm, Ramahi Bhushan 1977. "A mouse model for studying gastrointestinal microbial ecology." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/31133.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.<br>Includes bibliographical references (p. 131-133).<br>The mammalian gastrointestinal (GI) tract harbors a complex microbial ecosystem with hundreds of bacterial species at total levels as high as 10¹¹⁻¹² cells/g tissue. These bacteria play an important role in the health of the host as well as in causing disease, but studies on the roles of the GI microflora are hindered by the lack of a suitable model system. This thesis characterizes and uses a defined flora mouse model to study inte

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39

Coyte, Katharine. "The ecology and evolution of complex microbial communities." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:61ef24cb-93b5-4c5a-8a49-f2aea4eff3db.

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Microbial communities colonise virtually every habitable environment on earth. They live on us, inside us, and all around us, and are key components of the earth's ecosystem. However, due to the complexity of microbial communities we still understand relatively little about the mechanisms that drive their ecology and evolution. The aim of this thesis is to develop novel experimental and mathematical approaches, in order to investigate complex microbial communities. Specifically, this thesis is split into two parts, focussing in turn on how environmental complexity, and interspecies interaction

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40

Shaw, L. P. "The microbial ecology of human-associated bacterial communities." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10046977/.

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The bacterial communities within the human body have important associations with health and disease. Understanding their complexity requires ecological approaches. In this thesis, I apply ecological techniques and models to explore the microbial ecology of human-associated bacterial communities at multiple scales. In the first half of this thesis, I explore the oral microbiome using 16S rRNA gene sequencing data to characterise the effect of various factors on its diversity. Multiple factors apart from disease can also affect the oral microbiome, but their relative importance remains a matter

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41

Axelrod, Kevin Connor. "Bistable dynamics in microbial ecology and systems biology." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493470.

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Bistability, in which a system has two stable states, is a common property of many dynamic systems. This thesis explores the properties of such systems across a range of length scales, from gene circuits to ecosystems. Cells often store memories of environmental stimuli using bistable gene circuits. High fidelity memory storage requires that a state has a long lifetime. However, an underappreciated aspect of stable memory is that the distance from a bifurcation could determine how sensitive a state is to perturbations in the extracellular environment. We predict that cell memory should become

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42

Vazquez, Baeza Yoshiki. "Statistical Representations Of Microbial Systems." Thesis, University of California, San Diego, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10684635.

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<p> Technological developments in the past thirty years have transformed sequencing-based microbiology into a data-intensive field. Here, computing and efficient representations are catalyzers of insight into omnipresent and complex microbial interactions. Notably, classical ecologists have set the foundations for the way we analyze these systems, with some techniques dating back to the beginning of the twentieth century. In this thesis, we expand and where possible reuse these techniques to unravel the hidden patterns comprising the human gut microbiome.</p><p> To set an appropriate motivat

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43

Boyd, Philip W. "Carbon fluxes in marine microbial ecosystems." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334553.

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44

Fernández, Guerra Antonio. "Ecology and evolution of microbial nitrifiers / Ecología y evolución de los microorganismos nitrificantes." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/108001.

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Ammonia oxidation, the first and the rate-limiting step in nitrification, is one of the cornerstones of the cycle. Members from the bacterial and archaeal domains are key players in ammonia oxidation in many different environ- ments. Usually these organisms are found coexisting but the most recent studies suggests that archaeal ammonia oxidizers show an incredible ability to adapt and oxidize ammonia under different environmental conditions and have displaced their bacterial counterparts in terms of importance in the global biogeochemical cycle, providing an avalanche of AOA molecular data (16

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45

Flores, Gilberto Eugene. "Microbial Ecology of Active Marine Hydrothermal Vent Deposits: The Influence of Geologic Setting on Microbial Communities." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/250.

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The discovery of deep-sea hydrothermal vents in 1977 revealed an ecosystem supported by chemosynthesis with a rich diversity of invertebrates, Archaea and Bacteria. While the invertebrate vent communities are largely composed of endemic species and exist in different biogeographical provinces, the possible factors influencing the distribution patterns of free-living Archaea and Bacteria are still being explored. In particular, how differences in the geologic setting of vent fields influence microbial communities and populations associated with active vent deposits remains largely unknown. The

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Zactiti, Erica Marostica. "Desenvolvimento e caracterização de filmes biodegradaveis de alginato de calcio sem e com sorbato de potassio." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267668.

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Orientador: Theo Guenter Kieckbusch<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-04T01:55:31Z (GMT). No. of bitstreams: 1 Zactiti_EricaMarostica_D.pdf: 5513893 bytes, checksum: 1d3ab4df0091663092f98ac6015a9abe (MD5) Previous issue date: 2004<br>Resumo: Questões relacionadas à preservação ambiental têm sido intensamente discutidas, não somente devido à escassez de recursos naturais, mas também, em função da legislação que está cada vez mais rigorosa. Visando o desenvolvimento sustentável, a procura por novos ma

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Park, Tae Jin, and 朴台鎮. "Microbial community ecology in bioelectrochemical systems (BESs) using 16S ribosomal RNA (rRNA) pyrosequencing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/212634.

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48

Fritz, Alyce T. "Trophodynamics of estuarine (salt marsh) heterotrophic nanoplankton (microbial ecology, salt marsh ecology, choanoflagellates, Virginia)." W&M ScholarWorks, 1986. https://scholarworks.wm.edu/etd/1539616651.

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Seasonal occurrence and activity of heterotrophic nanoflagellates (HNANO or heteroflagellates) and bacteria were studied in a sheltered brackish water embayment of Chesapeake Bay wetlands (Virginia, USA) over a three year period (1981 - 1984). Epifluorescence direct counts and Scanning and Transmission Electron Microscopy (SEM and TEM) techniques were used for the description of organisms, enumeration, and biomass determinations. Seasonal bacterial growth rates and growth and grazing rates of bactivorous HNANO were estimated using diffusion chambers equipped with Nuclepore polycarbonate membra

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Fabrizzi, Karina Paola. "Microbial ecology and C and N dynamics in Agroecosystems." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/241.

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Walker, Jeffrey James. "Endolithic microbial ecosystems: Molecular phylogenetic composition, ecology and geobiology." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/dissertations/fullcit/3165820.

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