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Dissertations / Theses on the topic 'Microorganisms – Effect of water pollution'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ibrahim, Ashraf Samir Abdel-Aziz. "Biodegradation of crude oil and individual hydrocarbons by microorganisms." Thesis, Loughborough University, 1991. https://dspace.lboro.ac.uk/2134/27943.

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Samples collected from Kuwait were screened for microorganisms capable of oil degradation. A wide range of bacteria and fungi were able to degrade oil. The bacterial and fungal isolates differed in their ability to degrade crude oil. Rhodococcus isolates were more active than fungi in n-alkane biodegradation. Fungi also utilised one or more of the aromatic hydrocarbons studied while bacteria failed to do so.

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2

Chernicharo, Carlos Augusto de Lemos. "The effect of temperature and substrate concentration on the performance of U.A.S.B. reactors." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308963.

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3

Al-Rasheid, Khaled A. S. "The effect of heavy metals on the marine ciliate Euplotes mutabilis (Tuffrau, 1960)." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358875.

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4

Dando, Chrtistine. "The effect of zinc on physiological function in Gammarus pulex : a between-individual variation approach." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274947.

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5

Shaw, Peter James. "The effect of humic substances on the speciation and bioavailability of iron and phosphate in lakes." Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239867.

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6

Tennakoon, Nihal Ananda. "Effect of heavy metal contaminated sewage sludge on biological and chemical properties of coniferous forest soils." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU549118.

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A field study was carried out at Ardross forest, northern Scotland where heavy metal contaminated sewage sludge had been applied to a peaty podzol at rates of 500 (low) and 1000 (high) kg N ha-1 before tree (Sitka spruce) planting. Nitrogen mineralisation rates determined by field incubation of sealed cores ranged from 3.7 to 4.5 and 7.3 to 9.4 kg N h-1 over the growing season (May to September, 1991) in soils amended with low and high rates of sludge respectively. For the control soil, to which no sludge had been added, mineralisation rates ranged from 2.4 to 2.9 kg N ha-1. Mineralisation of

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7

Warwick, Oliver William Tindle. "The use of a biomarker to assess the effect of xenobiotic exposure on the freshwater invertebrate Gammarus pulex." Thesis, University of Sheffield, 1997. http://etheses.whiterose.ac.uk/10191/.

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Contamination of freshwaters is of concern because of its effect on ecosystem health. The effect of contamination can be assessed at all levels of biological organisation, from the ecosystem level to the molecular level. At the biochemical level, enzymes that are involved in the detoxification of organic chemical contaminants are useful as markers of contaminant exposure as they are often one of the first systems to respond to chemical exposure. Furthermore, changes in the activity of these enzymes may be indicative of effects at higher levels of biological organisation. In this study, the use

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8

Tessier, Catherine. "Ecotoxicological impacts of zebra mussels, Dreissena polymorpha, a new food source for lesser scaup, Aythia affinis." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34468.

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Zebra mussels (Dreissena polymorpha) have invaded a great proportion of the waters of the eastern part of North America. This mollusk may be a useful sentinel species for bioaccumulation of heavy metals and organic contaminants in aquatic ecosystems. The zebra mussel's capacity to bioaccumulate cadmium at environmentally relevant exposure and to sequester metals in metal-binding proteins, metallothioneins, was investigated. Elevated (relative to control) concentrations of Cd$ sp{2+}$ were detected in Dreissena exposed to $ ge$2 $ mu$g Cd/liter suggesting that zebra mussels cannot regulate Cd$

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9

Sarakinos, Helen C. "The use of chemical analyses, bioassays and benthic biomonitoring in the toxicity assessment of complex industrial effluents." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0019/MQ44271.pdf.

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10

Laopaiboon, Lakkana. "The effect of sublethal and lethal concentration of biocides on the performance and characteristics of rotating biological contactors and the properties of their biofilms." Thesis, University of Hertfordshire, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369763.

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11

Romanis, Marco. "Evaluation of agricultural effluents and irrigation water as sources of antimicrobial resistant Escherichia coli." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/95474.

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Thesis (MSc Food Sc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Food-borne disease outbreaks caused by Escherichia coli have been linked to the use of faecally-polluted irrigation waters. Thus the overall aim of this research was to evaluate irrigation water and agricultural effluents as sources of antibiotic resistant E. coli in the Western Cape. The aim of the first study was to enumerate and characterise E. coli present in irrigation water and in potential contamination sources. Maximum total coliform and E. coli counts for irrigation sites was log 7.862 and log 5.364 MPN.100 mL-1

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12

Nallani, Gopinath C. "Determination of Bioconcentration Potential of Selected Pharmaceuticals in Fathead Minnow, Pimephales promelas, and Channel Catfish, Ictalurus punctatus." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc33189/.

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The primary objective of this work was to determine the tissue-specific bioconcentration factors (BCFs) of the selected pharmaceuticals: norethindrone (NET), ibuprofen (IBU), verapamil (VER), clozapine (CLZ) and fenofibrate (FFB) in two freshwater fishes: fathead minnow and channel catfish. BCF tests on fathead followed the standard OECD 42-day test while a 14-day abridged test design was used in catfish exposures. Additional objectives included a) comparing the measured BCFs to the US EPA's BCFWIN model predicted values, b) comparing the BCF results from the standard and reduced tests, and c)

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13

Redick, Melinda. "Effects of Sublethal Copper Exposure on Escape Behavior and Growth of Rana pipiens Tadpoles." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3119/.

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This research is designed to test how sublethal exposure to copper affects tadpole predator-escape behavior and how quickly tadpoles recover. After exposure, tadpoles were separated. Escape behavior was recorded for two-thirds of exposed tadpoles while one-third of the exposed population was measured weekly to determine growth and recovery. Control tadpoles were consumed within 15 minutes whereas those exposed to higher concentrations were consumed at a slower rate, which does not support the hypotheses. Although the rate of predation was lower, tadpoles exposed to higher Cu concentrations wer

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14

Ubilava, Mariam. "Effect of winter storm on water quality and fish toxicity the Duwamish and Nisqually Rivers /." Online pdf file accessible through the World Wide Web, 2007. http://archives.evergreen.edu/masterstheses/Accession86-10MES/Ubilava_M%20MESThesis%202007.pdf.

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15

Gheorghiu, Cristina. "Concentration-dependent effects of waterborne zinc on the interactions between Gyrodactylus turnbulli (Monogenea) and the guppy (Poecilia reticulata)." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102979.

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This research investigated the effects of waterborne zinc (Zn) on the interactions between guppies, Poecilia reticulata (Peters), and Gyrodactylus turnbulli Harris, 1986, a monogenean parasite of its skin and fins. The first objective was to determine if sublethal concentrations of waterborne Zn (up to 240 mug/L added to artificial freshwater) exerted a concentration-dependent effect on the population dynamics of Gyrodactylus on isolated guppies. Whereas survival of uninfected fish was unaffected, mortality of infected fish increased linearly with increasing Zn concentration. In addition, the

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16

Maeng, Sung Kyu. "Effect of a silver-bearing photoprocessing wastewater and silver compounds on biological treatment processes." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19024.

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17

Franks, Carmen G., and University of Lethbridge Faculty of Arts and Science. "Phytoremediation of pharmaceuticals with salix exigua." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2006, 2006. http://hdl.handle.net/10133/536.

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Municipal treated wastewater entering rivers contain biologically active pharmaceuticals capable of inducing effects in aquatic life. Phytoremediation of three of these pharmaceuticals and an herbicide was investigated using Sandbar willow (Salix exigua) and Arabidopsis thaliana. Both plants were effective at removing compounds from solution, with removal of 86% of the synthetic estrogen, 17α-ethynylestradiol, 65% of the anti-hypertensive, diltiazem, 60% of the anti-convulsant, diazepam (Valium®), and 51% of the herbicide atrazine, in 24 hours. Distribution of compounds within roots and shoots

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18

Binder, Markus. "An evaluation of recirculating artificial stream designs for acute toxicity testing using two South African Ephemeroptera species exposed to sodium sulphate." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1005376.

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Three artificial stream designs, termed Large Artificial Stream Units (LASUs), Raceways, and Channels, at two major scales (1700 L, 12.5 L and 20 L recirculated volume) were developed at the Institute for Water Research, Rhodes University, Grahamstown, in order to explore the possibilities of using indigenous rheophilic macroinvertebrates in routine toxicity tests. This study compared these systems, using 96h-EC50 values from sodium sulphate toxicity tests as the experimental response. Two local Ephemeroptera (Leptophlebiidae: Adenophlebia auriculata Eaton, and Baetidae: Afroptilum sudafricanu

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19

Naigaga, Irene. "Bioaccumulation and histopathology of copper in Oreochromis mossambicus." Thesis, Rhodes University, 2003. http://hdl.handle.net/10962/d1005077.

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Cu is one of the most toxic elements that affect fish populations when the fish are exposed to concentrations exceeding their tolerance. To investigate the effects of elementary Cu on aspects of bioconcentration, histology and behaviour, O. mossambicus were exposed to 0 and 0.75 ± 0.20 mg/l of Cu for 96 hours (short-term study), and 0, 0.11 ± 0.02, 0.29 ± 0.02, and 0.47 ± 0.04 mg/l of Cu for 64 days (longterm study) under controlled conditions in the laboratory. For the long-term study fish were sampled for gills, liver, and kidney Cu accumulation analysis after 1, 32 and 64 days of exposure a

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20

Henderson, Shirley B. "An investigation into the effect on total toxicity predictions of interactions between components of a typical North Sea produced water." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/1232.

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21

Malm, Jennie. "Local Political Ecology and the Effect of Globalisation : A study of Industrial Water Pollution in Tirupur, South India." Thesis, Linköping University, Department of Thematic Studies, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2691.

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<p>Globalization and international competition put pressure on local communities to adjust to international standards of price and quality in production. Tirupur in India produces clothes for exports to the first world market. Because of the process of dyeing and bleaching of fabrics the river Noyyal that flows through the town and the surrounding ground water have become polluted. At the local level actors, like the state, business, NGOs and grassroots take action in different ways depending on their interests. The aim with this thesis is both to analyze the situation at the local level from

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22

Alloy, Matthew Michael. "Effects of Suspended Multi-Walled Carbon Nanotubes on Daphnid Growth and Reproduction." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28383/.

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Multi-walled carbon nanotube aggregates can be suspended in the aqueous phase by natural organic matter. These aggregates are ingested by filter feeding zooplankton. Ingested aggregates result in decreased growth and decreased reproduction. These effects may be caused by reduction in energy input from normal feeding behavior. pH alters natural organic matter structure through changes in electrostatic repulsion. Altered natural organic matter structure changes multi-walled carbon nanotube aggregate size. This size variation with variation in pH is significant, but not large enough a change in s

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23

Salah, Sharif Ali. "Heavy metals uptake by wheat under two transpiration rates." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33838.

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The present project aimed at measuring plant heavy metal uptake as a function of transpiration rates and dissolved heavy metal level in the soil solution. Two experiment was conducted separately in two season (Spring and Fall 2000). In these two experiments, young wheat plants ( Triticum aestivum) were irrigated with nine different solutions containing Cd and Zn. The study was conducted in two chambers where relative humidity was controlled to obtain two different levels of transpiration rates. Each control chambers contained 27 pots filled with sand and seeded with wheat plants, each nine tri

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24

Bauman, Stephanie. "ACUTE CHROMIUM (CHROMIUM(+VI)) TOXICITY IN THE ESTUARINE SHRIMP, MYSIDOPSIS BAHIA (CRUSTACEA: MYSIDACEA)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291245.

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25

Lee, Wen-Hsiung. "The effect of salinity on nutrient release from riverine and tributary estuarine sediments to the Chesapeake Bay under oxidizing and reducing conditions." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80053.

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The primary objective of this study was to determine the salinity effect on nutrient release and the denitrification rate in a sediment-water system. To accomplish this objective, bench-scale microcosm studies of York River sediments and Occoquan Reservoir sediments were conducted. Seawater and freshwater were mixed in various ratios to simulate seasonal, salinity-varying environments in the Chesapeake Bay and its tributary estuaries. Experiments were conducted under aerobic, anaerobic, and anoxic conditions. The results showed that high salinity can cause flocculation of particles and res

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26

Degger, Natalie. "Disruption of steroidogenesis and reproduction in marine medaka (oryzias melastigma) upon water and dietary exposure to silver nanoparticles." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/211562.

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27

Lonergan, Sean P. "Macroinvertebrate community responses to acidification : isolating the effects of pH from other water chemistry variables." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68205.

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The effect of lake acidification was evaluated, in the field, in terms of its impact on both the structural and functional composition of the macrozoobenthic community. The littoral macrozoobenthic community and water chemistry of 45 Canadian Shield lakes was sampled. The water chemistry variables sampled included pH, total dissolved calcium, conductivity, and dissolved organic acid (measured as colour). Partial canonical correlation analysis and partial regression analysis were used to identify those components of the macrozoobenthic community that most directly reflected pH variability. This

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28

Carrier, Roxie. "Temperature Tolerance of Freshwater Fish Exposed to Water-Borne Cadmium." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc504077/.

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Lethal toxicity values (96 h LC50; mg Cd/L) for the test species were similar: Lepomis cyanellus, 11.52; Notropis lutrensis, 6.62; Pimephales promelus, 3.58. However the effects of cadmium concentration and exposure time on temperature tolerance varied between species. Neither cadmium concentration nor exposure time had a significant effect on the CTM of green sunfish. Both cadmium concentration and exposure time had a significant effect on the CTMs of red shiners and fathead minnows. By day 10 mean CTMs were 2.3 t- 4.5 C (red shiners) and 4.2 to 5.7 C (fathead minnows) lower than control CTM.

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29

Crutcher, Candice M. "Diatoms as indicators of stream water quality in east central Indiana." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1266021.

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Three streams with watersheds of different land uses (urban, agricultural, and forested) were chosen for this study. A composite sample of diatoms was obtained from small rocks in a riffle of each stream and identified to genera. Water chemistry measurements included chloride, sulfate, nitrate, conductivity, pH, alkalinity and temperature.Conductivity, chloride, and sulfate were significantly higher in the urban watershed and lowest in the forested watershed. However, the forested watershed had the highest levels of nitrate, which may have come from groundwater or organic matter decomposition.

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30

Tani, Fahima. "Zinc and copper uptake by wheat and buckwheat under two transpiration rates." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79142.

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Wastewater has become a vital new supply for irrigation; however, concerns are mounting about environmental and health hazards related to heavy metals present in wastewater. Experiments were conducted to evaluate wheat ( Triticum aestivum L.) and buckwheat (Fagopyrum esculentum L.) uptake of copper (Cu) and zinc (Zn).<br>Some 15 plants per pot were allowed to establish themselves in the greenhouse for 4 and 6 weeks for buckwheat and wheat, respectively. Plants were then transferred to one of two growth chambers differing in the vapor pressure deficit (VPD), creating conditions for two d

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31

Chivers, Alicia M. "Investigating the Effects of 17α-Ethynylestradiol on Mitochondrial Genome Stability". PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/2989.

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Environmental toxicants are ubiquitous throughout the environment as a result of human activity. Among these toxicants, environmental estrogens are a category of particular concern due to their environmental prevalence and potency in altering reproductive traits. While many studies have addressed the detrimental effects of environmental estrogens on both aquatic and terrestrial organisms, few have analyzed the potential for these compounds to alter mitochondrial function. Mitochondria are the primary energy-generating system for all eukaryotic life, supporting all aspects of development, metab

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32

Richer, Guylaine. "Determinants of the short term dynamics of PCB uptake by the plankton." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60078.

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This study determines the effects of variations in suspended biomass, organic carbon, and pH on the time course of 2,2$ sp prime$,4,4$ sp prime$,5,5$ sp prime$-hexachlorobiphenyl uptake by laboratory cultures of Selenastrum capricornutum. Variations in pH had no effect, but uptake was enhanced by higher levels of biomass and depressed by higher levels of organic carbon. The coefficients for these measured effects on hexachlorobiphenyl were combined with existing relations based on molecular connectivity (X) or capacity ratio (K$ sp prime$) to yield semi-empirical equations to predict the insta

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33

Hemming, Jon Michael. "Evaluation of the Use of the Bivalves Ischadium recurvum Rafinesque, 1820 and Corbicula fluminea Muller, 1774 as Biological Indicators of Relative Water Quality in Terms of Growth and Upper Temperature Tolerance." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc278827/.

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Growth of mussels under laboratory conditions was examined under various food regimes in different water types and temperatures. Growth was less than would be useful as an indicator and comparisons with field exposures were of minimal value. The effects of organophosphates on bivalves were examined via toxicity tests, tissue concentration, and by controlling exposure through the use of physical constraints. Upper temperature tolerance of both bivalve species was examined with respect to different acclimation temperatures and organophosphate exposures. Deviations from control exposures occurred

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34

White, Jessica C. "Comparative Bioavailability of Dietary and Dissolved Cadmium to Freshwater Aquatic Snails." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4351/.

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Heavy metal bioaccumulation in aquatic organisms may occur through direct or indirect uptake routes. Research indicates that the significance of uptake route varies with contaminant and organism exposed. The relative importance of different metal sources in aquatic systems was investigated by exposing freshwater snails to dietary or dissolved sources of cadmium. Snails were exposed to control, contaminated food only, contaminated water only, and contaminated food and water treatments. During the 15-day exposure, samples were taken to determine Cd concentration in snail soft tissue, snail sh

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35

Tront, Jacqueline Marie. "Plant Activity and Organic Contaminant Processing by Aquatic Plants." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5234.

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This research explored fate of organic contaminants in aquatic plant systems through (i) experimental development of relationships to describe sorption, uptake and enzymatic processing of contaminants by plants and inhibition of aquatic plants by contaminants and (ii) incorporation of experimental relationships into a conceptual model which describes contaminant fate in aquatic plant systems. This study focused on interactions of aquatic plants L. minor and M. aquaticum with halogenated phenols. 2,4,5-trichlorophenol (2,4,5-TCP) and 2,4-dichlorophenol (2,4-DCP) are precursors for the highly

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36

Snyder, Craig David. "Physiological, population, and genetic responses of an aquatic insect (Isonychia bicolor) to chronic mercury pollution." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-165554/.

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37

Chi, Siu-chung, and 池少翀. "Eco-toxicity of antibiotics on aquatic organism." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43783600.

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38

DiAngelo, Constance Rose. "Energy levels and anaerobic endproducts in the brains of two species of teleost fish at death in anoxic water." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/45641.

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<p>The brain of fish, as in other vertebrates, is responsible for many functions basic to life and is also thought to be an anoxia-sensitive tissue. Therefore, during anoxia, the maintenance of energy within the brain is of paramount importance to the survival of the animal. Studies concerning energy levels and storage and the use of anaerobic metabolism in fish brains following exposure to anoxia are lacking.</p> <p> Rainbow trout (<u>Salmo gairdneri</u>) and brown bullhead catfish (<u>Ictalurus nebulosus</u>) occupy ecologically distinct habitats. Their tolerance of anoxia is diffe

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39

Kotze, Madelize J. "Investigating the efficacy of medium pressure UV and hydrogen peroxide as on-farm treatment methods to reduce the microbial load of irrigation water." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96867.

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Thesis (MSc Food Sc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Many South African farmers are forced to use water from nearby rivers for crop irrigation, since it is the most affordable and sometimes only source of water available to them. During this research project, a baseline study was performed on a farm irrigating fresh produce with water obtained from the Eerste River. The baseline study was done over a five month period, at six preselected sampling points, to determine the microbial and physico-chemical parameters of the water so a baseline could be established to compa

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40

Landeen, Lee Kevin 1965. "Inactivation of Legionella pneumophila by copper-silver ions and free chlorine." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276997.

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Water disinfection systems utilizing electrolytically generated copper:silver ions (200:20 to 400:40 ug/L) and low levels of free chlorine (0.1 to 0.4 mg/L) were evaluated at room (21-23°C) and elevated (39-40°C) temperatures in filtered well water (pH 7.3) for their efficacy in inactivating Legionella pneumophila (ATCC 33155). A contact time of 24 hr was necessary for copper:silver (400:40 ug/L) to achieve a 3 log₁₀ reduction in bacterial numbers at room temperature. As the copper:silver concentration increased to 800:80 ug/L (K = 7.50 x 10⁻³ log₁₀ reduction/min), the inactivation rate signif

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41

Sala, Comorera Laura. "Diversitat de comunitats heteròtrofes associades a les aigües de consum." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/402772.

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Els indicadors microbians de la contaminació fecal han estat útils al llarg dels anys pel control sanitari de la qualitat de l’aigua de consum. Tot i així, l’aigua mineral embotellada i l’aigua de la xarxa de distribució no són aigües estèrils sinó que contenen una gran diversitat de microorganismes. De fet, la diversitat pròpia de l’aigua de consum ha estat poc explorada fins el moment. El propòsit d’aquesta tesi doctoral va ser contribuir a l’estudi de la composició i la dinàmica de les comunitats microbianes de diferents tipus d’aigua de consum humà: aigua mineral natural envasada i aigua p

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42

DePoy, Richard Mark. "Physical, chemical and biological factors affecting the survival of fingernail clams in pool 8, upper Mississippi River." Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1014860.

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1 examined the temporal and spatial distribution of total ammonia nitrogen (TAN) and un-ionized ammonia (NH,) in sediment pore water and compared the temporal and spatial patterns of TAN and NH, in overlying surface water with those in pore water, to determine if they were reaching concentrations known to be deleterious to fingernail clams. Pore water was obtained by core extraction and subsequent centrifugation. TAN and NI-I3 in pore water were measured from May through December 1994, at ninety two sites in pool 8, upper Mississippi River, to a depth of five centimeters below the sediment-wat

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43

Trudel, Marc. "Bioenergetics and mercury dynamics in fish." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36723.

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This research focuses on the development, evaluation, and application of a mercury (Hg) mass balance model for predicting the accumulation of Hg in fish. This model requires accurate estimates of Hg elimination rate by fish and feeding rates to adequately predict Hg concentration in fish. An empirical model was developed to estimate Hg elimination by fish using data obtained from published experiments. This analysis showed that Hg elimination rate was overestimated in short-term experiments, positively correlated to water temperature, negatively correlated to body size, and that the eliminatio

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44

Toczydlowski, David G. "Aquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indices." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/45672.

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Three nontaxonomic indices; ATP/Chlorophyll <u>a</u>(ATP/Chla), ATP/ADP, and Chlorophyll <u>a</u>/Pheopigment (Chla/Pheo) were compared to the taxonomic measures of species diversity (d) and species richness as indicators of stress in aquatic environments. Field and laboratory microcosm responses of indigenous microbial communities exposed to municipal sewage treatment plant (STP) effluent were monitored. The STP effluent produced increased adenylate concentrations, ATP/ADP and ATP/Chla ratios, and decreased Chla, Chla/Pheo, d, and species richness relative to upstream reference comm

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Hayteas, David Lawrence. "A Semiquantitative Analysis of PCB and P,P-DDE Residues in Stranded Marine Mammals Using High Performance Liquid Chromatography." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/1395.

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Organochlorines are ubiquitous pollutants of the marine environment. These lipid-soluble and highly persistent compounds are found in detectable amounts in almost all marine organisms, and accumulate in the lipid tissues of marine animals. This bioaccumulation leads to biomagnification of these contaminants in higher trophic levels. Near the top of many marine food chains are found the marine mammals, in whose blubber high levels of organochlorine residues have been measured. The most commonly occurring of these pollutants in these animals are the polychlorinated biphenyls (PCB's) and p,p-DDE,

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Khanna, Nikki. "The biological response of foraminifera to ocean acidification." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/8089.

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Elevated atmospheric concentrations of carbon dioxide (CO₂), partly driven by anthropogenic activity, are decreasing the pH of the oceans. This thesis aimed to assess the biological response of foraminifera to ocean acidification. Foraminifera are single-celled organisms that form the dominant component of many marine communities. A series of laboratory experiments were carried out on benthic intertidal foraminifera from the Eden and Ythan estuaries, NE Scotland, to assess the impacts of ocean acidification. The responses of two dominant intertidal species of foraminifera (Haynesina germanica

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Bural, Cavit Burak. "Aerobic Biological Treatment Of Opium Alkaloid Wastewater-effect Of Gamma Radiation And Fenton&#039." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609829/index.pdf.

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In this study, aerobic biological treatment of opium alkaloid wastewater and the effect of gamma preirradiation and fenton&amp<br>#8217<br>s oxidation were investigated. First, the biodegradability of alkaloid wastewater was investigated by batch reactors and wastewater was found to be highly biodegradable providing 83 &amp<br>#8211<br>90 % COD degradation. In order to evaluate the effect of irradiation, original wastewater and irradiated wastewaters (40 &amp<br>140 kGy) were compared by means of BOD5/COD values and through aerobic batch experiments. Results indicated that irradiation imparted

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Kelly, Joann. "The effect of nutrient limitation on the growth and toxicity of the dinoflagellate Gyrodinium instriatum." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-3/kellyj/joannkelly.pdf.

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Morris, Kay. "Salinity and nutrients : growth and water use of aquatic macrophytes under controlled and natural conditions /." Title page, contents and summary only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phm876.pdf.

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Hamuel, James Doughari. "Effect of stress, antibiotics and phytochemicals on verotoxic isolates of acinetobacter haemolyticus and escherichia coli obtained from water and wastewater samples." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/808.

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Thesis submitted in fulfillment for the requirements for the degree Doctor Technologiae: Environmental Health in the Faculty of Applied Sciences, Cape Peninsula University of Technology, 2012<br>Water related issues such as water treatment and distribution have become extremely important all over the world due to population growth, growing urbanization, health and environmental pollutions. Contamination of water bodies especially in Africa with antibiotic resistant bacteria strains is a cause for concern. Escherichia coli O157 H:7, and various strains of non O157 E. coli and Acinetobac

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