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Showing 1 to 20 of 325 for “"planktonic"”.
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Computational Modeling of Planktonic and Biofilm Metabolism
… are ubiquitously able to live in both planktonic and biofilm states, which can be applied to dissolve the energy and environmental issues (e.g., producing biofuels and purifying waste water), but can also lead to serious public health problems. To better harness microorganisms, plenty …
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The evolution and palaeobiogeography of mesozoic planktonic foraminifera
… of Austria that were thought to be the earliest planktonic foraminifera. The first reactions of the palaeontological community were negative but in the subsequent forty years our knowledge of Jurassic planktonic foraminifera has expanded considerably. A thorough re-evaluation of the Oberhauser …
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Partitioning Between Soil-Adsorbed and Planktonic Escherichia coli
… aggregates, and behave very differently from planktonic bacteria. The goal of this research project was to identify and evaluate a laboratory method for partitioning between attached and planktonic bacteria that could be used to improve hydrologic modeling. Attachment was measured indirectly …
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Seasonal predictability and interannual variability in coastal planktonic communities
… the predictability and variability of coastal planktonic communities is essential for forecasting ecosystem responses to environmental change and managing marine resources. This thesis examines seasonal predictability, temperature-phenology relationships, and interannual bloom variability in …
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Effects of an herbicide on a planktonic food web
In situ microcosms of a planktonic community were exposed to the triazine herbicide simazine. Randomly selected sets of microcosms were collected and sampled each week for three weeks (plus Week 0). Samples of ambient water were collected each week for evaluation of enclosure effects. Physical and …
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Diversity, Distribution and Evolution of the Planktonic Diatom Family Chaetocerotaceae
… an abundant and diverse family of marine planktonic diatoms, containing two genera: <i>Chaetoceros</i> and <i>Bacteriastrum</i>. Its members uniquely share setae; thin siliceous tubes emerging from the valve corners, facilitating detection in samples. Strains were obtained from the Gulf of …
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Effect of silver nanoparticles on planktonic and biofilm cell growth
… This research focused on the impact of AgNPs on planktonic (e.g., free swimming) and biofilm bacteria that are relevant to wastewater treatment and the natural environment. Nitrifying bacteria and E. coli were used as model microorganisms because they are essential in nitrification processes and …
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The impacts of silver nanoparticles on planktonic and biofilm bacteria
… their interaction and uptake to laboratory grown planktonic and biofilm bacteria, as well as to natural marine biofilms using analytical, electron microscopy and molecular tools. The outcomes of this work describe the effects that environmental factors such as pH, ionic strength and presence of …
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A molecular approach to questions in the phylogeny of planktonic sarcodines
… of sarcodines (Sarcodina) which are exclusively planktonic and occur strictly in oligotrophic marine environments. Although these protists have been the topic of research since Ernst Haeckel's systematic investigations of samples from the H. M. S. Challenger Expedition, many aspects of their …
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Stratigraphy and Planktonic Foraminifera of the Upper Cretaceous Selma Group, Alabama
Made available in DSpace on 2015-05-12T22:33:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7105173.PDF: 11717544 bytes, checksum: 7747e5bbc77b7cbe83c79258898743a8 (MD5) Previous issue date: 1970
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A molecular approach to questions in the phylogeny of planktonic sarcodines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1996.
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The vertical distribution and migration of planktonic rotifers in a hypereutrophic tarn
The planktonic rotifers of Priest Pot were studied from January 1983 to September 1984. Routine weekly samples from January 1983 to March 1984 provided a uniquely detailed data set giving information on the vertical distribution of the rotifer community in relation to the environmental conditions. …
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Distribution patterns of fish during the planktonic period of their life history
… It is suggested that the accumulation of zooplanktonic food in slicks may be important for the feeding of ichthyoplankters. Many of the fish found in surface waters, be it in open water or around drift algae, had adult fin-ray counts and were not considered to be larvae, according to current …
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The distribution and dynamics of planktonic rotifera in the North Island, New Zealand
The distribution and dynamics of planktonic rotifers, at various spatial and temporal scales, were investigated in lakes of the North Island, New Zealand. The overall aim was to provide a better understanding of the relative influence of various environmental gradients in determining the …
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Characterizing the distribution of planktonic fecal bacteria in the James River, Richmond, Virginia
Surface waters containing fecal bacteria present significant public health risks. Understanding the sources of and factors affecting the distribution of fecal-indicating bacteria is necessary to predict potential illnesses more effectively. This thesis presents two studies on the distribution of …
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Benthic and Planktonic Microalgal Community Structure and Primary Productivity in Lower Chesapeake Bay
… to, but significantly different than neighboring planktonic populations.</p>
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Development and evaluation of novel antimicrobial solutions against biofilms and planktonic microbial growth
… peroxide, and ethanol, were used against planktonic (free-floating) microorganisms and biofilms (aggregated microorganisms). The Planktonic assay implemented use of a Millipore Filtration system. The Biofilm assays incorporated the MBEC plate, which included use of a 96-well plate with a …
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