subject:(Bioaccumulation)

Nelson Mandela Metropolitan University

1. [No author]. In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins.

Degree: Faculty of Science, 2015, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/4923

► The cyanobacterially synthesized non-canonical amino acid β-N-methylamino-ʟ-alanine (BMAA) has been proposed to be a causative agent in the development of sporadic neurodegenerative diseases. This neurotoxin… (more)

▼ The cyanobacterially synthesized non-canonical amino acid β-N-methylamino-ʟ-alanine (BMAA) has been proposed to be a causative agent in the development of sporadic neurodegenerative diseases. This neurotoxin bioaccumulates and biomagnifies with increasing trophic levels in ecosystems by associating with proteins. It has been suggested that these associations with host proteins also serve as a reservoir from where BMAA is slowly released with normal protein catabolism, resulting in a continuous low level exposure. However, the nature of these associations remains poorly defined. The widely accepted hypothesis regarding the nature of these associations is that BMAA associates with proteins through primary incorporation into proteins with specific replacement of serine. In addition to excitotoxicity, BMAA misincorporation has been proposed as a potential mechanism of toxicity because of its link to protein tangle diseases. Interactions between BMAA and proteins that are not the result of misincorporation, have also been observed. However, the nature of these non-primary associations has not been investigated. This study focussed on establishing whether BMAA is misincorporated into host proteins with consequent toxicity, and on elucidating the nature of the BMAA-protein associations not linked to primary incorporation. In comparative studies between BMAA and canavanine, an arginine analogue known to misincorporate, exposure to BMAA did not result in any toxicity in prokaryotes or in an undifferentiated eukaryotic mammalian cell line, in contrast to what was observed upon canavanine exposure. Differentiation of the cell line with nerve growth factor to express glutamate receptors resulted in marked toxicity upon BMAA exposure, highlighting excitoxicity as the main mechanism of BMAA toxicity. Furthermore, it was demonstrated that BMAA interacts with free amino acids and proteins in the absence of de novo protein synthesis, causing enzyme inhibition and protein misfolding. It was concluded that BMAA does not interact with proteins through primary incorporation and that the observed associations are the result of an interaction between BMAA and amino acid side chains to form covalent bonds.

Subjects/Keywords: Cyanobacteria; Bioaccumulation

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APA (6^th Edition):

author], [. (2015). In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/4923

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

author], [No. “In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins.” 2015. Thesis, Nelson Mandela Metropolitan University. Accessed January 21, 2021. http://hdl.handle.net/10948/4923.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

author], [No. “In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins.” 2015. Web. 21 Jan 2021.

Vancouver:

author] [. In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2015. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10948/4923.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

author] [. In vivo and In vitro investigations to elucidate the associations of B-N-methylamino-L-alanine with proteins. [Thesis]. Nelson Mandela Metropolitan University; 2015. Available from: http://hdl.handle.net/10948/4923

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba

2. Hrenchuk, Lee. Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes.

Degree: Biological Sciences, 2010, University of Manitoba

URL: http://hdl.handle.net/1993/4269

► To improve our understanding of how environmental mercury (Hg) concentrations influence Hg in fish, I conducted a field experiment to quantify the relative contributions of… (more)

Subjects/Keywords: bioaccumulation; METAALICUS

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APA (6^th Edition):

Hrenchuk, L. (2010). Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/4269

Chicago Manual of Style (16^th Edition):

Hrenchuk, Lee. “Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes.” 2010. Masters Thesis, University of Manitoba. Accessed January 21, 2021. http://hdl.handle.net/1993/4269.

MLA Handbook (7^th Edition):

Hrenchuk, Lee. “Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes.” 2010. Web. 21 Jan 2021.

Vancouver:

Hrenchuk L. Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes. [Internet] [Masters thesis]. University of Manitoba; 2010. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1993/4269.

Council of Science Editors:

Hrenchuk L. Accumulation of dietary and waterborne mercury by fish - experimental and whole-ecosystem approaches using enriched stable isotopes. [Masters Thesis]. University of Manitoba; 2010. Available from: http://hdl.handle.net/1993/4269

Victoria University of Wellington

3. Cook-Auckram, Liana. Heavy metal accumulation in marine fishes in Porirua Harbour.

Degree: 2019, Victoria University of Wellington

URL: http://hdl.handle.net/10063/8229

► Heavy metal or metalloids are common pollutants that are discharged into the aquatic environment by a variety of natural and anthropogenic sources, and have the… (more)

▼ Heavy metal or metalloids are common pollutants that are discharged into the aquatic environment by a variety of natural and anthropogenic sources, and have the ability to bio- accumulate in the tissues of marine organisms. Fish are among the top consumers in aquatic ecosystems and are widely recognised as bio-indicators for heavy metal pollution. Accumulation of heavy metals is influenced by factors such as species, age, size, and trophic level and can be found in various tissue types, such as muscle and liver tissue. In addition, contaminated fish can pose a threat to human consumers as they can cause acute and chronic disorders. Estuaries are particularly vulnerable to heavy metal pollution as they are as they are a direct recipient of raw sewage, industrial, residential and farming runoff. Estuaries provide essential habitat for a range of species, including fishes that occupy estuaries permanently or seasonally for breeding. Te Awarua-o-Porirua Harbour (Porirua Harbour) is the largest, and the most significant estuary in the southern North Island of New Zealand. It is a 807 hectare tidal lagoon estuary next to Porirua City and consists of two distinct estuary arms, Onepoto and Pauatahanui. Porirua Harbour once boasted a healthy and diverse ecosystem that supported fishes that are prized by the Ngati Toa as kaimoana. However, heavy metal contamination has become problematic following the introduction of intensive industry and development in the harbour catchment. The aim of this research was to 1) quantify levels of four heavy metals (Cu, Zn, Pb, and Hg) in the tissue (muscle and liver) of yellow belly flounder (Pātiki, tōtara, Rhombosolea leporina), sand flounder (Pātiki, Rhombosolea plebeia), speckled sole (Peltorhamphus latus), rig shark (Pioke, Makō, Mangō, Mustelus lenticulatus), short-tailed stingray (Whai, Dasyatis brevicaudata), and eagle ray (Whai keo, Myliobatis tenuicaudatus) caught in Porirua Harbour, and look for differences between sexes, tissue types, as well as effects of size and age, 2) examine each fish sampled for general metrics of health (parasite load, skin lesions, etc.) as well as diet, and look for relationships with body burdens of metals, 3) examine maternal offloading of heavy metals from pregnant rig shark to near-term embryos, 4) examine the movement of benthic fishes between the two estuary arms using mark/recapture methods. To assess heavy metal accumulation and movement in benthic fishes, fish were collected and/or tagged over a 4-month period in 2018 (March-August) across 8 sites in Porirua Harbour. Tagged fish were unable to be recovered so conclusions were left undetermined. Overall, liver tissue had the highest levels of heavy metal concentration, with the expectation of Hg being elevated in the muscle tissue of rig shark. There were significant differences observed for species, fish size, with smaller fishes having higher Cu concentration, and larger fish having higher Hg concentrations. There was little to no relationship observed between Zn and Pb concentrations in… Advisors/Committee Members: Phillips , Nicole, Dunn, Matt.

Subjects/Keywords: Estuary; Bioaccumulation; Fish

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APA (6^th Edition):

Cook-Auckram, L. (2019). Heavy metal accumulation in marine fishes in Porirua Harbour. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/8229

Chicago Manual of Style (16^th Edition):

Cook-Auckram, Liana. “Heavy metal accumulation in marine fishes in Porirua Harbour.” 2019. Masters Thesis, Victoria University of Wellington. Accessed January 21, 2021. http://hdl.handle.net/10063/8229.

MLA Handbook (7^th Edition):

Cook-Auckram, Liana. “Heavy metal accumulation in marine fishes in Porirua Harbour.” 2019. Web. 21 Jan 2021.

Vancouver:

Cook-Auckram L. Heavy metal accumulation in marine fishes in Porirua Harbour. [Internet] [Masters thesis]. Victoria University of Wellington; 2019. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10063/8229.

Council of Science Editors:

Cook-Auckram L. Heavy metal accumulation in marine fishes in Porirua Harbour. [Masters Thesis]. Victoria University of Wellington; 2019. Available from: http://hdl.handle.net/10063/8229

Royal Roads University

4. Milan, Idalia. Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? .

Degree: 2010, Royal Roads University

URL: http://hdl.handle.net/10170/143

► This pioneering investigation focused on the mercury bioaccumulation relationship of bats and insects. Identifying biomarkers that can be extrapolated to humans is necessary. Radio-transmitter-fitted bats… (more)

Subjects/Keywords: environmental science; toxicology; mercury; bioaccumulation

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APA (6^th Edition):

Milan, I. (2010). Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? . (Thesis). Royal Roads University. Retrieved from http://hdl.handle.net/10170/143

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Milan, Idalia. “Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? .” 2010. Thesis, Royal Roads University. Accessed January 21, 2021. http://hdl.handle.net/10170/143.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Milan, Idalia. “Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? .” 2010. Web. 21 Jan 2021.

Vancouver:

Milan I. Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? . [Internet] [Thesis]. Royal Roads University; 2010. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10170/143.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Milan I. Can mercury levels in bat species along the St. Lawrence River in Ontario be used as an effective biomarker in assessing ecosystem health? . [Thesis]. Royal Roads University; 2010. Available from: http://hdl.handle.net/10170/143

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

5. Hsieh, I-Ting. Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan.

Degree: PhD, Marine Biology, 2012, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028112-160816

► ABSTRACT Sipuncula is a group of unsegmented, coelomate, bilaterally symmetrical and wormlike marine deposit-feeding benthic macro-invertebrates. They are abundant along the intertidal habitats and around… (more)

▼ ABSTRACT Sipuncula is a group of unsegmented, coelomate, bilaterally symmetrical and wormlike marine deposit-feeding benthic macro-invertebrates. They are abundant along the intertidal habitats and around 150 species have been recorded worldwide. Sipunculans likely accumulate many anthropogenic contaminants by feeding on the contaminated sediments or benthos, and since they are edible marine species and have long been used in Southwest Pacific cuisine, these contaminants may transfer into the food chain and affect the public health of humans.Trace elements and PAHs are the most common contaminants that appear in the coastal areas worldwide. These contaminants lead to losses in oceanic yield and may hazardous effects on health when they enter the food chain. The previous studies of sipunculans along the coast of Taiwan were mostly focused on the taxonomy and distribution of the species living on the hard -ground habitat (rubble), one of the purposes of this study is aiming at the sipunculans on the seagrass beds and wetland soft-ground habitat for species diversity, population dynamic and ecological related research. Among 10 native sipunculans species, Sipunculus nudus is the dominant species living at the segrass bed and wetland in Taiwan. Siangshan wetland locates at the area of industrial pollution and S. nudus here is a species with aquatic economy, but is known limitedly of its population and environmental physiology. Therefore, the other purpose of this research is to investigate the S. nudus population in this wetland and analyze the trace elements: arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), and zinc (Zn) and the organic pollutants: PAHs, in order to understand the bioaccumulation of S. nudus in the above two types of soft-substrate regarding the pollutants. The main results of this study are as follows: (1) This study represents a pioneering investigation in Taiwan regarding the species diversity of sipunculans on the seagrass meadow soft-ground sediment, which describes the species and their morphological characteristics. A total of 42 specimens 10 sipunculan species belonging to 3 families were identified. (2) It is the first time that S. nudus is realized as the dominant species in these soft habitats. Because of its cultivation potential, its population dynamics and reproductive cycle in Siangshan wetland were studied. The population size of S. nudus in this area is 0.965Â± 0.46 ind.m-2 and the sex ratio is around 1:1; the reproductive period is from April to September in the year with the peak reproductive period from May to August; the body length of matured individual is over 11cm. (3) This is the first report in Taiwan on the trace elements in sipunculan and their surrounding sediments. The bioaccumulation characteristics of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), and zinc (Zn) were analyzed and compared in two sipunculan species, S. nudus and Siphonosoma vastum, which were collected from seagrass beds and wetlands in Taiwan. Both sipunculans in… Advisors/Committee Members: Meng-Hsien Chen (chair), Hsueh-Wen Chang (chair), Fung-Chi Ko (committee member), Hin-Kiu Mok (committee member), I-Jiunn Cheng (chair), Hsi-Te Shih (chair).

Subjects/Keywords: Taiwan; Wetland; Sipunculan; Diversity; Bioaccumulation

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APA (6^th Edition):

Hsieh, I. (2012). Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028112-160816

Chicago Manual of Style (16^th Edition):

Hsieh, I-Ting. “Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan.” 2012. Doctoral Dissertation, NSYSU. Accessed January 21, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028112-160816.

MLA Handbook (7^th Edition):

Hsieh, I-Ting. “Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan.” 2012. Web. 21 Jan 2021.

Vancouver:

Hsieh I. Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan. [Internet] [Doctoral dissertation]. NSYSU; 2012. [cited 2021 Jan 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028112-160816.

Council of Science Editors:

Hsieh I. Study on the sipunculan diversity and the bioaccumulation in wetland of Taiwan. [Doctoral Dissertation]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028112-160816

Cape Peninsula University of Technology

6. Melato, Aupaki Michael. Bioaccumulation of metals in the Kuils River, Western Cape .

Degree: 2011, Cape Peninsula University of Technology

URL: http://etd.cput.ac.za/handle/20.500.11838/2013

► World wide urban rivers are the most utilised and degraded. A variety of everyday sources of metal pollution exist that is entrenched in the modern… (more)

▼ World wide urban rivers are the most utilised and degraded. A variety of everyday sources of metal pollution exist that is entrenched in the modern way of life. Lately there has been a tremendous growth in the establishment and development of human settlements, both formal and informal in the Cape Town area. The surroundings of the Kuils River are not excluded from this. There are various communities in close proximity to the Kuils River. Due to this, more industries are also being established. This has caused an increased production of potential environmental pollutants, including metals. The aim of the study was firstly, to identify potential sources of metal pollution along the entire length of the Kuils River, in order to identify sampling sites. Secondly, to identify the metals contaminating the water and sediment of the Kuils River. Thirdly, to determine the bioaccumulation of metals in freshwater snails (Physa ecuta). Four sampling sites were identified along the Kuils River. Freshwater snails (P. acuta), sediment and water were collected every 2 months for a period of one year. The following metals were investigated: Aluminium (AI), Cadmium (Cd) Cobalt (Co), Chromium (Cr), Copper (Cu), Iron (Fe), Lead (Pb), Manganese (Mn), Nickel (Ni.) and Zinc (Zn). Samples were digested with 55% nitric acid. The Inductively Coupled Plasma - Atomic Emission Spectrometer (ICP-AES) were used for metal analyses. The results were statistically analysed by means of ANOVA on ranks using the Sigmastat statistical package. Results revealed that most metals found in water, sediment and snails had significantly higher concentrations at site 1. This is possibly due to input from the surrounding urban area and nearly agricultural activities. Water concentrations of AI, Cu, Mn and Zn were higher than the DWAF (1996) guidelines. Sediment was mostly contaminated with AI, Fe, Pb and Zn, while the snails contained significant levels of Cu, Fe, Mn and Zn. Further investigations involving toxicity testing should be conducted to determine the toxicity of these metals to (Physa acuta). Advisors/Committee Members: Odendaal, J. P (advisor), Snyman, R. G (advisor).

Subjects/Keywords: Metals – Bioaccumulation; Metals – Environmental aspects

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APA (6^th Edition):

Melato, A. M. (2011). Bioaccumulation of metals in the Kuils River, Western Cape . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/2013

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Melato, Aupaki Michael. “Bioaccumulation of metals in the Kuils River, Western Cape .” 2011. Thesis, Cape Peninsula University of Technology. Accessed January 21, 2021. http://etd.cput.ac.za/handle/20.500.11838/2013.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Melato, Aupaki Michael. “Bioaccumulation of metals in the Kuils River, Western Cape .” 2011. Web. 21 Jan 2021.

Vancouver:

Melato AM. Bioaccumulation of metals in the Kuils River, Western Cape . [Internet] [Thesis]. Cape Peninsula University of Technology; 2011. [cited 2021 Jan 21]. Available from: http://etd.cput.ac.za/handle/20.500.11838/2013.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Melato AM. Bioaccumulation of metals in the Kuils River, Western Cape . [Thesis]. Cape Peninsula University of Technology; 2011. Available from: http://etd.cput.ac.za/handle/20.500.11838/2013

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Lakshmanan, P T. Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters.

Degree: Marine Science;, 1982, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/1145

Subjects/Keywords: Molluscs; Bioaccumulation

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APA (6^th Edition):

Lakshmanan, P. T. (1982). Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/1145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lakshmanan, P T. “Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters.” 1982. Thesis, Cochin University of Science and Technology. Accessed January 21, 2021. http://dyuthi.cusat.ac.in/purl/1145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lakshmanan, P T. “Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters.” 1982. Web. 21 Jan 2021.

Vancouver:

Lakshmanan PT. Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters. [Internet] [Thesis]. Cochin University of Science and Technology; 1982. [cited 2021 Jan 21]. Available from: http://dyuthi.cusat.ac.in/purl/1145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lakshmanan PT. Investigations on the Chemical Constituents and Tracemetal Interactions in some Bivalve Molluscs of the Cochin Backwaters. [Thesis]. Cochin University of Science and Technology; 1982. Available from: http://dyuthi.cusat.ac.in/purl/1145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

8. Fuji, Takashi, 1961-. Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods.

Degree: PhD, Toxicology, 1997, Oregon State University

URL: http://hdl.handle.net/1957/28900

► The "equilibrium partitioning theory" is one of the most widely used models to evaluate the bioavailability of sediment-associated, nonpolar, organic contaminants and it makes specific… (more)

▼ The "equilibrium partitioning theory" is one of the most widely used models to evaluate the bioavailability of sediment-associated, nonpolar, organic contaminants and it makes specific assumptions regarding the factors that influence this bioavailability. The objective of this research was to test two assumptions of this theory: (1) that benthic organisms are exposed to a constant, equilibrium-predicted concentration of a contaminant in interstitial water, regardless of the behavior of the organism; and (2) that exposure to interstitial water in a sediment exposure system is equivalent to the exposure in a water-only exposure system. The effect of behavior on the exposure to sediment-associated phenanthrene was tested by exposing three marine amphipod species (with different burrowing behaviors) to the polycyclic aromatic hydrocarbon (PAH) phenanthrene under two exposure conditions, one with spiked sediment and clean overlying water and the other with spiked sediment and contaminated overlying water. This was done to evaluate the extent to which the burrow irrigating behavior and the different tube or burrow building behavior exhibited by the amphipod species could effect the accumulation of sediment-associated phenanthrene. The assumption of equivalent exposure between sediment and water systems was tested by exposing the amphipods to the same concentration of phenanthrene in a water-only versus sediment exposure system. In both series of experiments, the bioaccumulation of phenanthrene by the amphipods was followed over 72 hours and bioaccumulation kinetics calculated for each species and exposure treatment. The results indicated that the burrow irrigating behavior of benthic marine amphipods can significantly affect the exposure of these amphipods to sediment-associated contaminants by diluting the concentration of contaminant in the interstitial water surrounding the organisms with overlying water. Additionally, there was a species dependent decrease in exposure based upon the tube or burrow building strategy used by the amphipod species. The results also indicated that exposure in a sediment system was not equivalent to exposure in a water-only system. The bioaccumulation of phenanthrene was significantly higher for all three species in water versus sediment. However, the interpretation of the results from this second series of experiments was complicated by the degradation of phenanthrene in the sediment-only exposure. Advisors/Committee Members: Weber, Lavern J. (advisor).

Subjects/Keywords: Phenanthrene – Bioaccumulation

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APA (6^th Edition):

Fuji, Takashi, 1. (1997). Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/28900

Chicago Manual of Style (16^th Edition):

Fuji, Takashi, 1961-. “Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods.” 1997. Doctoral Dissertation, Oregon State University. Accessed January 21, 2021. http://hdl.handle.net/1957/28900.

MLA Handbook (7^th Edition):

Fuji, Takashi, 1961-. “Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods.” 1997. Web. 21 Jan 2021.

Vancouver:

Fuji, Takashi 1. Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods. [Internet] [Doctoral dissertation]. Oregon State University; 1997. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1957/28900.

Council of Science Editors:

Fuji, Takashi 1. Biotic and abiotic factors influencing the bioavailability of sediment-associated phenanthrene to marine amphipods. [Doctoral Dissertation]. Oregon State University; 1997. Available from: http://hdl.handle.net/1957/28900

9. Laxmi Priys, S. Ecotoxicology and bioaccumulation of zinc in marine organisms; -.

Degree: Science and Humanities, 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/22117

►

Leather processing industry is known to be associated with the newlinegeneration of liquid waste with high Total Dissolved Solids TDS in newlineparticular salinity Consequently the… (more)

▼

Leather processing industry is known to be associated with the newlinegeneration of liquid waste with high Total Dissolved Solids TDS in newlineparticular salinity Consequently the disposal of the tannery wastewater with newlinehigh salinity has become a major concern for the tanning industry Salicornia newlinebrachiata is an annual halophyte belonging to the Chenopodiaceae family and newlineis distributed throughout the world It is a green jointed vascular flowering newlineand leafless halophytic plant that carries articulated succulent stems newlineThe main objective of this study is to remediate the salinity from newlinetannery wastewater contaminated lands by using S brachiata It was grown in newlinepots fed with varying concentrations of sodium chloride NaCl viz 0 100 newline200 300 400 500 and 600 mM under laboratory conditions for a period of newline90 days The effect of salt stress on morphological and physiological newlinecharacteristic changes of S brachiata in pot study was observed newlineAt every 30 days interval the S brachaita plant samples were newlinecollected and measured the shoot root length and fresh and dry weight of newlinesamplesThe optimal growth of S brachiata plants were observed at 500 mM newlineof NaCl The experimental plants showed a decrease in chlorophyll newlinecarbohydrate lipid contents with an increase in concentration of NaCl newlineHowever accumulation of sodium and chloride protein and proline were newlineincreased by an increase in concentration of NaCl with particular reference to newlinesalinity due to osmotic stress The polypeptide profiling of S brachiata under newlinethe influence of salinity has been analyzed The effect of salinity stress on newlinepolyphenol content and changes in antioxidant enzyme activities were newlineanalyzed Polyphenol content was increased at 600 mM on 90 th day of NaCl newlinetreated S brachiata The antioxidant enzymes such as Polyphenol oxidase newlinePPO Catalase CAT and Superoxide Dismutase SOD were analyzed newlineThe gene sequence of S brachiata was identified using ITS rDNA newlinemarker S brachiata plants were treated with soaking wastewater resulted in newlinedrastic reduction of growth in terms of fresh and dry weight newline newline

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Advisors/Committee Members: Ramesh, R.

Subjects/Keywords: Bioaccumulation; Ecotoxicology; Marine Organisms; Zinc

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APA (6^th Edition):

Laxmi Priys, S. (2013). Ecotoxicology and bioaccumulation of zinc in marine organisms; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/22117

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Laxmi Priys, S. “Ecotoxicology and bioaccumulation of zinc in marine organisms; -.” 2013. Thesis, Anna University. Accessed January 21, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/22117.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Laxmi Priys, S. “Ecotoxicology and bioaccumulation of zinc in marine organisms; -.” 2013. Web. 21 Jan 2021.

Vancouver:

Laxmi Priys S. Ecotoxicology and bioaccumulation of zinc in marine organisms; -. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Jan 21]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/22117.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Laxmi Priys S. Ecotoxicology and bioaccumulation of zinc in marine organisms; -. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/22117

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

10. Burke, Samantha. An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.

Degree: 2019, University of Waterloo

URL: http://hdl.handle.net/10012/14823

► Arctic freshwater ecosystems are subject to profound climate-driven changes. Air temperatures are rising, leading to changes that include increased primary production and enhanced permafrost degradation.… (more)

▼ Arctic freshwater ecosystems are subject to profound climate-driven changes. Air temperatures are rising, leading to changes that include increased primary production and enhanced permafrost degradation. These and other climate-related effects interact to influence the accumulation of mercury in sediments and food webs of Arctic lakes. Mercury is a neurotoxin that is harmful to human and animal health, and in its methylated form, mercury can be taken up and biomagnified through food webs. The controls on mercury deposition, bioaccumulation, and biomagnification are complex and spatially variable. An area where especially little is known about spatial and temporal variability in mercury accumulation is in the food webs and sediments of lakes on the Arctic Coastal Plain of Alaska (ACP), a lake-rich region in northern Alaska. Sediment cores were collected from three thermokarst lakes on the ACP and analyzed to understand changes in, and drivers of, Hg accumulation over the past ~100 years (Chapter 2). Mercury accumulation in two of the three lakes was variable and high over the past century (mean=37.4 µg/m2/year and mean = 45.8 µg/m2/year), and largely controlled by sedimentation rate. Mercury accumulation in the third lake was lower (mean = 6.5 µg/m2/year), more temporally uniform, and was more strongly related to sediment Hg concentration than sedimentation rate. Sediment mercury concentrations were quantitatively related to measures of sediment composition and VRS-inferred chlorophyll-a, and sedimentation rates were related to various catchment characteristics. These results were compared to data from 37 previously studied Arctic and Alaskan lakes. Results from the meta-analysis indicate that lake thermokarst lakes have significantly higher and more variable Hg accumulation rates than non-thermokarst lakes, suggesting that properties of thermokarst lakes, such as thermal erosion, thaw slumping, and low hydraulic conductivity likely make these lakes prone to high and variable Hg accumulation rates. Following the observation that catchment influence varied spatially on the ACP, and that it affected the amount of, and pathways by which, mercury accumulated in lake sediments (Chapter 2), I hypothesized that catchment influence may also affect how mercury enters and accumulates in lake food webs on the ACP. In Chapter 3, six lakes were sampled across a physico-chemical gradient on the ACP to investigate variability in methylmercury levels ([MeHg]) in Ninespine stickleback (Pungitius pungitius), a fish species that was present in all lakes. Evidence suggested that bioaccumulation of MeHg through lake food webs was indirectly affected by degree of catchment influence. Methyl mercury concentrations in sediments and filter feeding invertebrates were higher in lakes that were inferred to be more autochthonous (less catchment influence), but higher in periphyton from lakes that were inferred to be more allochthonous (more catchment influence). Regardless of catchment influence, benthic invertebrates had higher…

Subjects/Keywords: Mercury; Arctic; permafrost; bioaccumulation

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APA (6^th Edition):

Burke, S. (2019). An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14823

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Burke, Samantha. “An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.” 2019. Thesis, University of Waterloo. Accessed January 21, 2021. http://hdl.handle.net/10012/14823.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Burke, Samantha. “An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.” 2019. Web. 21 Jan 2021.

Vancouver:

Burke S. An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10012/14823.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Burke S. An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14823

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Addis Ababa University

11. Selamawit, Geta. Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway.

Degree: 2012, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/295

► The study had been carried out between July 2009 and June 2010 on the food chain components of Lake Ziway. Bioaccumilation and biotransference of heavy… (more)

▼ The study had been carried out between July 2009 and June 2010 on the food chain components of Lake Ziway. Bioaccumilation and biotransference of heavy metals and organochlorine pesticides were measured and determined in tilapia (Oreochromis niloticus) and Abyssinian ground hornbill (Bucorvus abyssinicus) to evaluate ecological hazard levels. Heavy metals were determined using flame atomic absorption spectroscopy after digestion of the samples under reflux on kjeldhal hot plate apparatus using HNO3, HCLO4 and H2O2. Sample extraction for organochlorine pesticides analysis was carried out in a Soxhlet apparatus using mixtures of n-hexane and acetone (4:1) and clean up was carried out using SPE Cartridge (C-18 column). Gas chromatograph equipped with mass- spectrometer (GC-MS) was used for the detection and quantification of the organochlorine pesticides. Heavy metals; Cu, Zn, Cd and Pb were investigated with mean concentrations of 1.13 mg/kg, 27.13 mg/kg, 0.35 mg/kg and 0.28 mg/kg in tilapia and 8.91 mg/kg, 139.08 mg/kg, 0.225 mg/kg and 0.286 mg/kg in Abyssinian ground hornbill muscle tissue samples. The detected organochlorine pesticides were dieldrin, DDT and the metabolites of DDT (DDD and DDE). DDT and DDD are below the detection limit in tilapia and detected with mean concentration of 0.19ng/g and 0.14ng/g in Abyssinian ground hornbill samples. Dieldrin and DDE were detected in mean concentrations, 4ng/g and 0.45ng/g in tilapia and 11.8ng/g and 12.61ng/g in Abyssinian ground hornbill samples. Zn and Cu indicated biotransference up the food chain with 5 folds and 7.9 folds, respectively while Cd and Pb showed lower concentration in the predator bird. DDE and dieldrin were detected in the bird sample with 28 and 3 folds higher than the amount detected in the fish muscle tissue, respectively. From the detected heavy metals and organochlorine pesticides Zn, Cu, dieldrin, DDT and its metabolites indicated positive biotransference through the food chain. The concentrations of the detected heavy metals and organochlorine pesticides were compared with threshold limits set by international organizations and the levels are within the accepted limits. Advisors/Committee Members: Afework Bekele (Prof.) (advisor).

Subjects/Keywords: Biotransference; Contaminant; Bioaccumulation; Organochlorine

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APA (6^th Edition):

Selamawit, G. (2012). Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/295

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Selamawit, Geta. “Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway. ” 2012. Thesis, Addis Ababa University. Accessed January 21, 2021. http://etd.aau.edu.et/dspace/handle/123456789/295.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Selamawit, Geta. “Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway. ” 2012. Web. 21 Jan 2021.

Vancouver:

Selamawit G. Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Jan 21]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/295.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Selamawit G. Determination of Bioaccumulation and Food Chain Contamination of Heavy Metals and Organochlorine Pesticides in Tilapia (Oreochromis niloticus) and Abyssinian Ground Hornbill (Bucorvus abyssinicus), Lake Ziway. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/295

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Klanjscek, Tin. Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations.

Degree: 2006, MIT and Woods Hole Oceanographic Institution

URL: http://hdl.handle.net/1912/1244

► Energy intake of individuals affects growth of organisms and, therefore, populations. Persistent lipophilic toxicants acquired with the energy can bioaccumulate and harm individuals. Marine mammals… (more)

Subjects/Keywords: Bioenergetics; Bioaccumulation

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APA (6^th Edition):

Klanjscek, T. (2006). Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations. (Thesis). MIT and Woods Hole Oceanographic Institution. Retrieved from http://hdl.handle.net/1912/1244

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Klanjscek, Tin. “Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations.” 2006. Thesis, MIT and Woods Hole Oceanographic Institution. Accessed January 21, 2021. http://hdl.handle.net/1912/1244.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Klanjscek, Tin. “Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations.” 2006. Web. 21 Jan 2021.

Vancouver:

Klanjscek T. Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations. [Internet] [Thesis]. MIT and Woods Hole Oceanographic Institution; 2006. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1912/1244.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Klanjscek T. Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations. [Thesis]. MIT and Woods Hole Oceanographic Institution; 2006. Available from: http://hdl.handle.net/1912/1244

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

13. Forsberg, Norman D. From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling.

Degree: PhD, Toxicology, 2013, Oregon State University

URL: http://hdl.handle.net/1957/37979

► Environmental toxicologists and public health officials are responsible for assisting in the identification, management, and mitigation of public health hazards. As a result, there is… (more)

▼ Environmental toxicologists and public health officials are responsible for assisting in the identification, management, and mitigation of public health hazards. As a result, there is a continued need for robust analytical tools that can aid in the rapid quantification and characterization of chemical exposure. In the first research phase, we demonstrated that a current tool for estimating human organophosphate pesticide exposure, measuring dialkyl phosphate (DAPs) metabolites in urine as chemical biomarkers of pesticide exposure, could represent exposure to DAPs themselves and not to pesticides. We showed that DAPs are metabolically stable, have high oral bioavailability, and are rapidly excreted in the urine following oral exposure. Results suggest that DAP measurements may lead to overestimates of human organophosphate pesticide exposure. In the second phase of research, a quick, easy, cheap, effective, rugged, and safe (QuEChERS) based analytical method was developed and validated for quantifying polycyclic aromatic hydrocarbons (PAHs) in biotic matrices with fat contents that ranged from 3 to 11%. Our method improved PAH recoveries 50 to 200% compared to traditional QuEChERS methods, performed as well or better than state of the art Soxhlet and accelerated solvent extraction methods, had sensitivity useful for chemical exposure assessments, and reduced sample preparation costs by 10 fold. The validated QuEChERS method was subsequently employed in a human exposure assessment. Little is known about how traditional Native American fish smoke-preserving methods impact PAH loads in smoked foods, Tribal PAH exposure, or health risks. Differences in smoked salmon PAH loads were not observed between Tribal smoking methods, where smoking methods were controlled for smoking structure and smoke source. PAH loads in Tribally smoked fish were up to 430 times greater than those measured in commercially available smoked fish. It is not likely that dietary exposure to non-carcinogenic PAHs at heritage ingestion rates of 300 grams per day poses an appreciable risk to human health. However, levels of PAHs in traditionally smoked fish may pose and elevated of risk of cancer if consumed at high rates over a life time. Accurately estimating PAH exposure in cases where aquatic foods become contaminated is often hindered by sample availability. To overcome this challenge, we developed a novel analytical approach to predict PAH loads in resident crustacean tissues based on passive sampling device (PSD) PAH measurements and partial least squares regression. PSDs and crayfish collected from 9 sites within, and outside of, the Portland Harbor Superfund site captured a wide range of PAH concentrations in a matrix specific manner. Partial least squares regression of crayfish PAH concentrations on freely dissolved PAH concentrations measured by PSDs lead to predictions that generally differed by less than 12 parts per billion from measured values. Additionally, most predictions (> 90%) were within 3-fold of measured values,… Advisors/Committee Members: Anderson, Kim A. (advisor), Field, Jennifer (committee member).

Subjects/Keywords: Organophosphorus compounds – Bioaccumulation – Testing – Methodology

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APA (6^th Edition):

Forsberg, N. D. (2013). From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/37979

Chicago Manual of Style (16^th Edition):

Forsberg, Norman D. “From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling.” 2013. Doctoral Dissertation, Oregon State University. Accessed January 21, 2021. http://hdl.handle.net/1957/37979.

MLA Handbook (7^th Edition):

Forsberg, Norman D. “From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling.” 2013. Web. 21 Jan 2021.

Vancouver:

Forsberg ND. From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling. [Internet] [Doctoral dissertation]. Oregon State University; 2013. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1957/37979.

Council of Science Editors:

Forsberg ND. From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling. [Doctoral Dissertation]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/37979

University of Ottawa

14. Al-Ansari, Ahmed. Bioaccumulation of 17α-Ethinylestradiol in Fish .

Degree: 2012, University of Ottawa

URL: http://hdl.handle.net/10393/22684

► The active synthetic constituent of oral contraceptives 17α- ethinylestradiol (EE2) and its natural steroidal estrogen analogues are being released into the aquatic environment mainly via… (more)

▼ The active synthetic constituent of oral contraceptives 17α- ethinylestradiol (EE2) and its natural steroidal estrogen analogues are being released into the aquatic environment mainly via wastewater treatment plants (WWTPs). Although steroidal estrogens have been frequently reported in very low concentrations in the environment, they have been placed at the top of the list of endocrine disrupting chemicals (EDCs) for their high estrogenic activity in non-target aquatic species like fish and frogs. Almost 30 years worth of intensive research has moved the problem of endocrine disruption in the aquatic environment from being a hypothesis to a well-known cause-and-effect story. However, the fate and effects of many pharmaceuticals, including EE2, remain poorly understood. Thus, the main objective of this thesis was to investigate EE2 bioaccumulation in fish by field and laboratory studies. An optimized sample preparation and analytical method protocol was achieved to detect EE2 in its biologically active form in whole fish tissue at trace levels (ng/g). Shorthead redhorse suckers (ShRHS) (Moxostoma macrolepidotum) collected in proximity to a WWTP in the St. Clair River have significantly accumulated EE2 with an average of 1.5 ng/g. EE2 bioaccumulation was limited to fish exhibiting intersex and with induced vitellogenin (VTG). EE2 was absent in fish from a reference site. Positive correlations between EE2 and lipid content as well as "15N supported the hypothesis of EE2 bioaccumulation in wild ShRHSs. A wider survey was carried out to explore patterns of EE2 bioaccumulation in the pelagic and benthic food-wed of the St. Clair IV River, Ontario. In the WWTP effluents and nearby surface waters, EE2 levels were extremely low and below our method detection limits. All of the seven sampled species from different trophic levels and the sediment samples collected from the impacted sites and the reference sites did not have any measurable EE2 concentrations. A laboratory controlled study where male goldfish (Carassius auratus) were exposed to EE2 via water versus food demonstrated that fish can rapidly accumulate EE2 by both routes of exposure. The uptake constant for water was 45 h-1 and the bioconcentration factor for EE2 in fish was 377. The fast uptake rate of EE2 via water coincided with a much slower elimination rate constant of 0.0786 h-1. The assimilation efficiency of 0.106 for EE2 by goldfish was determined by EE2 dietary exposure, which was used to predict EE2 accumulation under different exposure scenarios. The work presented here was the first demonstration of EE2 bioaccumulation in wild fish and the first to model EE2 bioaccumulation from water and dietary exposure in laboratory-exposed fish.

Subjects/Keywords: 17α- ethinylestradiol; bioaccumulation; fish

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Al-Ansari, A. (2012). Bioaccumulation of 17α-Ethinylestradiol in Fish . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/22684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Al-Ansari, Ahmed. “Bioaccumulation of 17α-Ethinylestradiol in Fish .” 2012. Thesis, University of Ottawa. Accessed January 21, 2021. http://hdl.handle.net/10393/22684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Al-Ansari, Ahmed. “Bioaccumulation of 17α-Ethinylestradiol in Fish .” 2012. Web. 21 Jan 2021.

Vancouver:

Al-Ansari A. Bioaccumulation of 17α-Ethinylestradiol in Fish . [Internet] [Thesis]. University of Ottawa; 2012. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10393/22684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Al-Ansari A. Bioaccumulation of 17α-Ethinylestradiol in Fish . [Thesis]. University of Ottawa; 2012. Available from: http://hdl.handle.net/10393/22684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Cross, Richard Kynaston. The fate of engineered nanomaterials in sediments and their route to bioaccumulation.

Degree: PhD, 2017, University of Exeter

URL: http://hdl.handle.net/10871/32761

► The production of engineered nanomaterials is an emerging and rapidly expanding industry. It exploits the capacity for materials to be manufactured to present particular properties… (more)

▼ The production of engineered nanomaterials is an emerging and rapidly expanding industry. It exploits the capacity for materials to be manufactured to present particular properties distinct from the bulk material, through tailoring of the particle size and surface functionality. This ability to fine tune particle properties at the nanoscale is responsible for the explosion in uses of engineered nanomaterials in industries as diverse as cosmetics and medicine, to “green” technologies and manufacturing. However, this increased reactivity at the nanoscale, defined as having at least one dimension < 100 nm in size, is also responsible for the increasing concern over their environmental safety. Material flows of engineered nanoparticles into the aquatic environment have been identified throughout their production, use and disposal, putting these ecosystems at potential risk of contamination. In particular, sediments are a likely sink of engineered nanomaterials in the aquatic environment due to their propensity to destabilise and settle out of suspension in natural freshwaters. An emerging body of literature has demonstrated toxicity of nanomaterials to aquatic species. In this thesis, the case is presented for using bioaccumulation as a first indicator of risk to aquatic organisms exposed to engineered nanomaterials. Using the sediment dwelling freshwater worm, Lumbriculus variegatus, this work investigates the factors which govern the bioaccumulation of cerium oxide and silver nanomaterials. It is hypothesised that the fate of these materials in sediments will be determined by their core composition, primary particle size and surface coating. A novel approach is presented to measure two biologically relevant fate parameters (persistence of particles and dissolved species in the sediment pore waters) and how particle properties affect the distribution of the nanomaterials between these phases of the sediment. This provides the context within which to interpret biological exposures assessing both the extent of uptake and how they are accumulated, whether through dietary uptake or across the skin. Understanding this route to uptake is important as the mechanism of toxicity may depend upon the point of contact of a material at the nano-bio interface. For example, a nanoparticle which comes into contact with biological material in the gut may exert a different effect upon an organism than one which is translocated directly across the skin. It is demonstrated that sediment properties determine the fate of engineered nano cerium oxide and silver to a greater extent than stabilising surfactants, with the majority of particles aggregating or associating with the solid constituents of the sediment > 200 nm in size. The dissolved fraction of the metal present in the pore waters was a better predictor of bioavailability than the persistence of particulate material < 200 nm in size, with partially soluble nanosilver being more available than insoluble cerium oxide. The route to metal nanoparticle uptake also differed with particle…

Subjects/Keywords: 500; Nanomaterials; sediments; ecotoxicology; bioaccumulation

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APA (6^th Edition):

Cross, R. K. (2017). The fate of engineered nanomaterials in sediments and their route to bioaccumulation. (Doctoral Dissertation). University of Exeter. Retrieved from http://hdl.handle.net/10871/32761

Chicago Manual of Style (16^th Edition):

Cross, Richard Kynaston. “The fate of engineered nanomaterials in sediments and their route to bioaccumulation.” 2017. Doctoral Dissertation, University of Exeter. Accessed January 21, 2021. http://hdl.handle.net/10871/32761.

MLA Handbook (7^th Edition):

Cross, Richard Kynaston. “The fate of engineered nanomaterials in sediments and their route to bioaccumulation.” 2017. Web. 21 Jan 2021.

Vancouver:

Cross RK. The fate of engineered nanomaterials in sediments and their route to bioaccumulation. [Internet] [Doctoral dissertation]. University of Exeter; 2017. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10871/32761.

Council of Science Editors:

Cross RK. The fate of engineered nanomaterials in sediments and their route to bioaccumulation. [Doctoral Dissertation]. University of Exeter; 2017. Available from: http://hdl.handle.net/10871/32761

16. Sundelin, Anna. Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks.

Degree: Ecology and Environmental Sciences, 2015, Umeå University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105613

► Complex mixtures of biologically active pharmaceutical residues continuously enter aquatic environments via wastewater, where it can affect species through preserved human drug targets or… (more)

Subjects/Keywords: Bioconcentration; Bioaccumulation; Behaviour; Pharmaceutical mixtures.

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APA (6^th Edition):

Sundelin, A. (2015). Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105613

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sundelin, Anna. “Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks.” 2015. Thesis, Umeå University. Accessed January 21, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105613.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sundelin, Anna. “Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks.” 2015. Web. 21 Jan 2021.

Vancouver:

Sundelin A. Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks. [Internet] [Thesis]. Umeå University; 2015. [cited 2021 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105613.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sundelin A. Ecotoxicological effects on a food-web exposed to pharmaceuticals : Uptake and effects of oxazepam, fexofenadine and a mixture of both in algae, zooplankton and sticklebacks. [Thesis]. Umeå University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105613

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington

17. Feary, Alexander. Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery.

Degree: 2011, Victoria University of Wellington

URL: http://hdl.handle.net/10063/1962

► The restoration of Nauru’s mined areas is fundamental to the future wellbeing of the people and ecosystems of Nauru. Extensive open cast phosphate mining on… (more)

Subjects/Keywords: Bioaccumulation; Cadmium; Phosphate mining

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APA (6^th Edition):

Feary, A. (2011). Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/1962

Chicago Manual of Style (16^th Edition):

Feary, Alexander. “Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery.” 2011. Masters Thesis, Victoria University of Wellington. Accessed January 21, 2021. http://hdl.handle.net/10063/1962.

MLA Handbook (7^th Edition):

Feary, Alexander. “Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery.” 2011. Web. 21 Jan 2021.

Vancouver:

Feary A. Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery. [Internet] [Masters thesis]. Victoria University of Wellington; 2011. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10063/1962.

Council of Science Editors:

Feary A. Restoring the Soils of Nauru: Plants as Tools for Ecological Recovery. [Masters Thesis]. Victoria University of Wellington; 2011. Available from: http://hdl.handle.net/10063/1962

University of Windsor

18. Li, Jiajia. Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish.

Degree: PhD, Earth and Environmental Sciences, 2018, University of Windsor

URL: https://scholar.uwindsor.ca/etd/7374

► Global contamination by mercury (Hg) and polychlorinated biphenyls (PCBs) coupled with high health risks to humans requires exposure models. The models must correctly predict Hg… (more)

▼ Global contamination by mercury (Hg) and polychlorinated biphenyls (PCBs) coupled with high health risks to humans requires exposure models. The models must correctly predict Hg and PCB concentrations in fish, which in turn, requires accurate estimates of model parameters. This dissertation first quantified assimilation efficiencies (AE) and elimination coefficients (ktot) of Hg and PCBs in Goldfish (Carassius auratus). Then, a non-steady state toxicokinetic model, combined with a Wisconsin bioenergetics model, was developed to simulate Hg and PCB bioaccumulation in Silver Carp (Hypophthalmichthys molitrix), Bighead Carp (Hypophthalmichthys nobilis), and Bluegill (Lepomis macrochirus) from multiple locations. Finally, a sensitivity analysis was performed for these three modeled species to evaluate the relative contribution of each parameter to the model outcomes. The results indicated that dietary AEs were 98±10 % and 40±9 % for MeHg and PCBs, respectively, thus, Hg had a higher AE compared to PCBs. The ktot of MeHg was 0.010±0.002 d-1, which was equivalent to those measured for highly hydrophobic PCBs with log KOW =7.2. In addition, using the tissue specific growth rate, the non-steady state bioenergetics/kinetics model was generally able to simulate differences in the bioaccumulation trends of PCBs and Hg for the study species. The sensitivity analysis indicated that toxicokinetic parameters representing tissue growth rate are as influential as model parameters associated with ontogenetic diet shifts in terms of explaining age specific Hg and PCB bioaccumulation. Overall, this dissertation was the first to directly compare chemical toxicokinetics between Hg and PCBs within the same organism, and to quantify the effect of tissue specific growth rate on bioaccumulation of these contaminants by fish using a non-steady state bioenergetics/ toxicokinetics model. It was concluded that Hg has a higher bioaccumulation potential than PCBs, and suggested tissue growth rates should be incorporated in future bioaccumulation models especially as they apply to modelling PCB dynamics in fish. Advisors/Committee Members: Haffner, Douglas, Drouillard, Ken.

Subjects/Keywords: Bioaccumulation; Bioenergetics; Mercury; PCBs; Toxicokinetics

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APA (6^th Edition):

Li, J. (2018). Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/7374

Chicago Manual of Style (16^th Edition):

Li, Jiajia. “Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish.” 2018. Doctoral Dissertation, University of Windsor. Accessed January 21, 2021. https://scholar.uwindsor.ca/etd/7374.

MLA Handbook (7^th Edition):

Li, Jiajia. “Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish.” 2018. Web. 21 Jan 2021.

Vancouver:

Li J. Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish. [Internet] [Doctoral dissertation]. University of Windsor; 2018. [cited 2021 Jan 21]. Available from: https://scholar.uwindsor.ca/etd/7374.

Council of Science Editors:

Li J. Mercury and Polychlorinated Biphenyl Bioaccumulation Dynamics in Fish. [Doctoral Dissertation]. University of Windsor; 2018. Available from: https://scholar.uwindsor.ca/etd/7374

University of Manitoba

19. Wang, Kang. Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic.

Degree: Environment and Geography, 2019, University of Manitoba

URL: http://hdl.handle.net/1993/33838

► Mercury (Hg) is a major contaminant in the Arctic marine ecosystem, with concentrations in marine mammals and Indigenous Peoples frequently exceeding safety thresholds. The key… (more)

▼ Mercury (Hg) is a major contaminant in the Arctic marine ecosystem, with concentrations in marine mammals and Indigenous Peoples frequently exceeding safety thresholds. The key step of Hg bioaccumulation is Hg methylation in the ocean, as the resulting monomethylmercury (MMHg) biomagnifies in the marine food webs. However, little is known about the sources and dynamics of seawater MMHg in the Arctic. In this research, high vertical resolution profiles of total Hg and methylated Hg (MeHg, sum of MMHg and dimethylmercury) were measured, for the first time, in seawater across the Canadian Arctic from the Canada Basin in the west, through the Canadian Arctic Archipelago, to Baffin Bay in the east and reaching Labrador Sea in the North Atlantic Ocean. Whereas total Hg concentrations are lower in the western Canadian Arctic, MeHg is enriched at shallow depths and its peak concentration decreases from west to east. Biological uptake of this subsurface MeHg and subsequent biomagnification can readily explain the regional gradients of biotic Hg in the Canadian Arctic. Seawater MeHg concentrations show significant correlations with nutrients and apparent oxygen utilization, but this does not necessarily support that MeHg is produced in-situ in the water column; instead, further analysis with water masses and N* reveals that the subsurface MeHg is likely originated from the Chukchi Sea sediments and advected within the Upper Halocline Water to the Canadian Arctic. The long-distance transport implies that MeHg in Arctic seawater must have a half-life much longer than previously determined from the seawater incubation approach, which is problematic in estimating Hg methylation and demethylation rates in seawater. Incubation studies with an Arctic copepod (Calanus hyperboreus) show that the microenvironments in copepod guts and fecal pellets are unlikely hotspots for Hg methylation, and that the copepod preferentially bioaccumulates MMHg over inorganic Hg and the main uptake pathway is trophic transfer. This study underlines the importance of seawater MeHg in controlling Hg bioaccumulation in Arctic marine food webs, and calls for more studies on processes that produce and maintain the subsurface seawater MeHg enrichment to better understand the exposure of MeHg to the Arctic ecosystem and Indigenous Peoples. Advisors/Committee Members: Wang, Feiyue (Environment and Geography) (supervisor), Stern, Gary (Environment and Geography) Macdonald, Robbie (Environment and Geography) Kuzyk, Zou Zou (Geological Sciences) Letcher, Robert (Chemistry, Carleton University) (examiningcommittee).

Subjects/Keywords: Methylmercury; Seawater; Canadian Arctic; Bioaccumulation

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APA (6^th Edition):

Wang, K. (2019). Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/33838

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Kang. “Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic.” 2019. Thesis, University of Manitoba. Accessed January 21, 2021. http://hdl.handle.net/1993/33838.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Kang. “Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic.” 2019. Web. 21 Jan 2021.

Vancouver:

Wang K. Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic. [Internet] [Thesis]. University of Manitoba; 2019. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1993/33838.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang K. Methylmercury in Seawater and Its Bioaccumulation in Marine Food Webs of the Canadian Arctic. [Thesis]. University of Manitoba; 2019. Available from: http://hdl.handle.net/1993/33838

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University

20. Jones, Patrick Robert. Polonium-210 dynamics in the northern Gulf of Mexico.

Degree: MS, Oceanography and Atmospheric Sciences and Meteorology, 2013, Louisiana State University

URL: etd-01102014-112535 ; https://digitalcommons.lsu.edu/gradschool_theses/2699

► Polonium-210 (t1/2=138 d) is the most common among the 33 known radioisotopes of Polonium found in the natural environment. It is produced by the radioactive… (more)

▼ Polonium-210 (t1/2=138 d) is the most common among the 33 known radioisotopes of Polonium found in the natural environment. It is produced by the radioactive decay of its long-lived grandparent Lead-210(t1/2=22.3 d) via Bismuth-210 (t1/2=5.012 d) and forms as part of the natural Uranium-238 decay series. The primary hazard associated with Polonium-210 is its radioactivity, as an alpha particle emitter. Marine organisms receive their maximum radioactive dose in the natural environment from Polonium-210. Polonium has been known to bioaccumulate in the marine food web and can be potentially harmful to humans via the intake of certain marine organisms. Thus it is important to understand the source and sink of Polonium-210 in the marine environment. A number of studies in the past have observed Polonium-210 remobilization from sediments in anoxic lake environments but the release mechanism has never been studied in low oxygen marine systems. On the other hand, the biological affinity of Polonium-210 allows it to be used as an effective tracer of POC export from the upper ocean, although no such study using Polonium-210 as a tracer of POC flux has been carried out in the northern Gulf of Mexico. The present work is aimed at understanding both remobilization of Polonium-210 from sediments in the hypoxia zone of the northern Gulf of Mexico and utilizing Polonium-210 as a tracer of POC export in the northern Gulf of Mexico. Results from our study indicate Polonium-210 was enriched in bottom waters by as much as 50% compared to surface waters from sample stations in the hypoxia zone in 2011 and 2012. No strong correlation between oxygen concentration and unsupported Polonium-210 activity was apparent. However, there was a good correlation between Polonium-210 enrichment and the release of redox sensitive trace metals like Fe and Mn. Due to the affinity of Polonium-210 to Fe and Mn, the cycling of redox sensitive elements such as Fe and Mn and the degradation of organic matter in the water column are likely the driving mechanisms of Polonium-210 remobilization from sediments to the water column under hypoxic conditions. The second study utilized Polonium-210 as a tracer for POC export and was carried out along a north south transect in the Gulf of Mexico beginning near the mouth of the Atchafalaya River and ending on the slope of the continental shelf. POC fluxes were estimated using the Lead-210 – Polonium-210 disequilibria in the water column and varied between 10.4 mg C m-2 d-1 and 85.6 mg C m-2 d-1 and showed a general decreasing trend further offshore similar to the decrease in net primary productivity further from shore. The efficiency of the biological pump was found to decrease from 21% at stations close to shore to 4% at stations further offshore, suggesting a transition in POC export efficiency from nutrient rich eutrophic water to nutrient poor oligotrophic water.

Subjects/Keywords: Hypoxia; Bioaccumulation; Remobilization; Alpha Particle

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APA (6^th Edition):

Jones, P. R. (2013). Polonium-210 dynamics in the northern Gulf of Mexico. (Masters Thesis). Louisiana State University. Retrieved from etd-01102014-112535 ; https://digitalcommons.lsu.edu/gradschool_theses/2699

Chicago Manual of Style (16^th Edition):

Jones, Patrick Robert. “Polonium-210 dynamics in the northern Gulf of Mexico.” 2013. Masters Thesis, Louisiana State University. Accessed January 21, 2021. etd-01102014-112535 ; https://digitalcommons.lsu.edu/gradschool_theses/2699.

MLA Handbook (7^th Edition):

Jones, Patrick Robert. “Polonium-210 dynamics in the northern Gulf of Mexico.” 2013. Web. 21 Jan 2021.

Vancouver:

Jones PR. Polonium-210 dynamics in the northern Gulf of Mexico. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2021 Jan 21]. Available from: etd-01102014-112535 ; https://digitalcommons.lsu.edu/gradschool_theses/2699.

Council of Science Editors:

Jones PR. Polonium-210 dynamics in the northern Gulf of Mexico. [Masters Thesis]. Louisiana State University; 2013. Available from: etd-01102014-112535 ; https://digitalcommons.lsu.edu/gradschool_theses/2699

University of Adelaide

21. Knight, Emma Rae. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.

Degree: 2020, University of Adelaide

URL: http://hdl.handle.net/2440/128232

► Per- and poly-fluorinated substances (PFASs) are a group of compounds with similar structures and have a unique set of properties which make them resistant to… (more)

▼ Per- and poly-fluorinated substances (PFASs) are a group of compounds with similar structures and have a unique set of properties which make them resistant to biodegradation, available to bioaccumulate, and potentially toxic to many organisms in the environment. Yet there is currently limited information on the fate and bioavailability of PFASs in the soil environment. The thesis investigates the sorption and bioavailability of three commonly reported perfluoroalkyl acids (PFAAs) in a wide range of soils with varying properties and determines if sorption coefficients and bioaccumulation can be predicted from soil properties and are affected by residence time in soil. Preliminary studies found that sorption of 14C-perfluoroocatanioc acid (PFOA) was considerable on common laboratory consumables, e.g. centrifuge tubes and syringe filters. In contrast to reports in the literature, sorption losses on polypropylene tubes were found to be significantly higher than on glass tubes. Sorption losses were also significant using syringe filter membranes. This highlights that significant errors can occur, creating analytical bias during routine laboratory procedures. Sorption (Kd) of perfluorooctane sulphonic acid (PFOS), 14C-PFOA and perfluorohexane sulphonic acid (PFHxS) was investigated in a wide range of Australian soils with varying properties. Modelling was conducted to determine if soil properties could predict sorption coefficients using two modelling strategies: multiple linear regression (MLR) using traditional laboratory chemical analyses of soils; and diffuse reflectance Fourier transform mid-infrared spectroscopy coupled to partial least squares regression (DRIFT-PLSR). The sorption coefficients for all three compounds were at the lower end of the ranges previously reported, perhaps due to the low amounts of organic carbon (OC) and alkaline pH of many Australian soils. The retention of PFOA was weak in all soils, but even more so in subsoils, indicating that PFOA could easily be leached through surface- and sub-soil horizons into ground-waters. The retention of PFOS and PFHxS was not affected by soil depth. The sorption of all three PFAAs was influenced by their structural differences and different soil properties. The sorption of PFOA was positively affected by OC and silt-plus-clay content, PFOS sorption was positively correlated to OC content and negatively correlated to pH and PFHxS sorption was positively correlated to OC content, clay content and concentrations of exchangeable cations. DRIFT-PLSR modelling indicated that soils dominated with quartz and pyrophyllite minerals had a low affinity for PFOA sorption. The DRIFT-PLSR modelling of PFOS and PFHxS sorption was unreliable, likely due to the low and narrow range of Kd values found. For PFOA modelling, similar results were found between the MLR and DRIFT-PLSR modelling strategies which suggested that DRIFT-PLSR could be used as a quicker and cheaper technique to predict sorption compared to traditional laboratory analyses of soil coupled with MLR. The aging… Advisors/Committee Members: McLaughlin, Michael (advisor), Kookana, Rai (advisor), Navarro, Divina (advisor), School of Agriculture, Food and Wine (school).

Subjects/Keywords: Sorption; bioaccumulation; PFAAs; plant uptake

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Knight, E. R. (2020). Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/128232

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Knight, Emma Rae. “Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.” 2020. Thesis, University of Adelaide. Accessed January 21, 2021. http://hdl.handle.net/2440/128232.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Knight, Emma Rae. “Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.” 2020. Web. 21 Jan 2021.

Vancouver:

Knight ER. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. [Internet] [Thesis]. University of Adelaide; 2020. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/2440/128232.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Knight ER. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. [Thesis]. University of Adelaide; 2020. Available from: http://hdl.handle.net/2440/128232

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Flickinger, Allison. Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir.

Degree: 2015, University of Nevada – Reno

URL: http://hdl.handle.net/11714/2513

► Historic mining practices have left the Carson River and Lahontan Reservoir (CRLR) system contaminated with high levels of mercury (Hg). Hg levels in Lahontan Reservoir… (more)

▼ Historic mining practices have left the Carson River and Lahontan Reservoir (CRLR) system contaminated with high levels of mercury (Hg). Hg levels in Lahontan Reservoir planktivorous and predatory fish exceed federal human consumption limits. Inputs of Hg to the system are a result of contaminated bank erosion during high flow and diffusion from contaminated bottom sediments during low flow. The United States Bureau of Reclamation has produced future streamflow estimates for 2000-2099 using 112 CMIP3 climate projections and the Variable Infiltration Capacity (VIC) model. VIC results suggest that the hydrology of the system is likely to experience increased frequency of both high and low extreme flows, and the monthly averages of future flows are expected to be higher in the winter and lower in the summer compared to historical simulated flows. The VIC streamflow projections and modeled reservoir outputs are prepared as input for a Hg transport model, which consists of three numeric codes dynamically coupled (RIVMOD, WASP5, and MERC4). The dissolved methylmercury (MeHg) simulated from these models runs are used as input for a bioenergetics and mercury mass balance model (BioHg) which computes the bioaccumulation of MeHg in Sacramento blackfish in the Lahontan Reservoir. Model results suggest that loads of total Hg, total MeHg, and dissolved MeHg will decrease most significantly in the spring and summer due to the channel width increases and the depth decreases which reduce bank erosion over the century. Dissolved Hg loads increase in both the winter and spring, but decrease in the summer. An increase in channel bottom area leads to a higher rate of diffusive flux of dissolved Hg. Bioaccumulation levels may increase in both the South and Middle Basins of the reservoir as a result of an increase in dissolved MeHg concentrations, but decrease in the North Basin due to mercury settling out in the upstream sections of the reservoir and the dilution effect of the Truckee Canal input near the Lahontan Dam. All three sections of the reservoir will maintain fish Hg levels above the federal action limit for consumption. Advisors/Committee Members: Carroll, Rosemary WH (advisor), Warwick, John J (committee member), Schumer, Rina (committee member).

Subjects/Keywords: Bioaccumulation; Climate Change; Mercury; Modeling

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APA (6^th Edition):

Flickinger, A. (2015). Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/2513

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Flickinger, Allison. “Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir.” 2015. Thesis, University of Nevada – Reno. Accessed January 21, 2021. http://hdl.handle.net/11714/2513.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Flickinger, Allison. “Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir.” 2015. Web. 21 Jan 2021.

Vancouver:

Flickinger A. Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir. [Internet] [Thesis]. University of Nevada – Reno; 2015. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/11714/2513.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Flickinger A. Impact of Potential Climate Change on Predicted Fluvial Transport of Mercury and Associated Bioaccumulation along the Carson River-Lahontan Reservoir. [Thesis]. University of Nevada – Reno; 2015. Available from: http://hdl.handle.net/11714/2513

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

23. Van Wyk, Erika. A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/9745

►

M.Sc. (Zoology)

Blood samples were obtained from 42 Cape (Gyps coprotheres) Vultures during the period 1990 to 1991. Nestlings were sampled at two natural localities… (more)

Subjects/Keywords: Vultures; Gyps coprotheres; Pesticides and wildlife; Bioaccumulation; Pesticides - Bioaccumulation

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APA (6^th Edition):

Van Wyk, E. (2014). A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/9745

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Van Wyk, Erika. “A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood.” 2014. Thesis, University of Johannesburg. Accessed January 21, 2021. http://hdl.handle.net/10210/9745.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Van Wyk, Erika. “A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood.” 2014. Web. 21 Jan 2021.

Vancouver:

Van Wyk E. A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10210/9745.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Van Wyk E. A biochemical genetic study of Gyps coprotheres with notes on the bioaccumulation of pesticides in the blood. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/9745

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. Bertin, Delphine. Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates.

Degree: Docteur es, Écologie des communautés, fonctionnement des écosystèmes, écotoxicologie, 2014, Université Claude Bernard – Lyon I

URL: http://www.theses.fr/2014LYO10274

►

L'accumulation de composés persistants dans le biote constitue des préoccupations écologiques, sanitaires et réglementaires. Parmi ces substances, les composés per- et polyfluorés (PFASs) représentent un… (more)

▼

L'accumulation de composés persistants dans le biote constitue des préoccupations écologiques, sanitaires et réglementaires. Parmi ces substances, les composés per- et polyfluorés (PFASs) représentent un cas d'intérêt, en raison de leurs propriétés physico-chimiques particulières. Ces dernières rendent le comportement des PFASs dans l'environnement difficilement prévisibles, les outils actuels n'étant pas adaptés. Bien qu'il soit reconnu que ces composés sont persistants et s'accumulent dans le biote, de nombreuses inconnues subsistent, notamment sur les mécanismes de transferts sédiment–biote et des facteurs qui les contrôlent. Ce travail de thèse aborde le rôle du sédiment dans les processus d'accumulation, et plus particulièrement (a) les voies d'exposition du biote, (b) le rôle de la diversité biologique dans l'accumulation, par l'exposition de deux invertébrés benthiques (Chironomus riparius et gammarus sp.) à du sédiment naturel. La description des cinétiques d'accumulation et d'élimination des PFASs ont mis en évidence la biodisponibilité des composés pour les organismes. Ainsi, un modèle de bioaccumulation en accord avec la croissance des organismes et des particularités des composés a permis d'estimer des constantes d'accumulation et de dépuration (ku et ke). Une représentation conceptuelle du transfert des composés, a permis de comprendre les principales voies de contamination des organismes. D'autre part, la variabilité interspécifique a été évaluée par la comparaison de la bioaccumulation et des voies de transfert des PFASs chez ces deux invertébrés. Ce travail de thèse aura alors permis d'ouvrir de nombreuses questions, notamment celles du rôle du biofilm et de la bioturbation des organismes dans la bioaccumulation et ouvre les perspectives quant à l'étude de la bioamplification

The accumulation of persistent compounds in biota creates environmental, health and regulatory concerns. Among these substances, the poly-fluorinated compounds (PFASs) represents a case of interest due to their specific physicochemical properties. So the PFAs behavior in the environment is difficult to predict as the existing tools are not suitable. Athough it is recognized that these compounds are persistent and accumulate in biota, many knowledge gaps remain, including the mechanisms of sediment-biota transfer and the factors that control them. This thesis examines the role of sediment in the accumulation process, especially (a) exposure routes of biota, (b) role of biodiversity in the accumulation, by exposing two benthic invertebrates (Chironomus riparius and Gammarus sp.) to natural sediment. The description of PFASs kinetics of accumulation and elimination have showed the biodisponibility of the compounds to organisms. Thus, a bioaccumulation model including the organisms growth and the specificity of the compounds was used to estimate the accumulation and depuration rate constants (ku and ke). A conceptual representation of compounds transfer allowed us to understand the major routes for organisms contamination.…

Advisors/Committee Members: Garric, Jeanne (thesis director), Babut, Marc (thesis director).

Subjects/Keywords: Sédiment; PFASs; Bioaccumulation; Invertébrés benthiques; Sediment; PFASs; Bioaccumulation; Benthic invertebrates; 577

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APA (6^th Edition):

Bertin, D. (2014). Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2014LYO10274

Chicago Manual of Style (16^th Edition):

Bertin, Delphine. “Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates.” 2014. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed January 21, 2021. http://www.theses.fr/2014LYO10274.

MLA Handbook (7^th Edition):

Bertin, Delphine. “Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates.” 2014. Web. 21 Jan 2021.

Vancouver:

Bertin D. Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2014. [cited 2021 Jan 21]. Available from: http://www.theses.fr/2014LYO10274.

Council of Science Editors:

Bertin D. Transfert des composés perfluorés des sédiments aux invertébrés benthiques : Transfer of perfluorinated compounds from sediment to benthie invertebrates. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2014. Available from: http://www.theses.fr/2014LYO10274

Université de Bordeaux I

25. Strady, Emilie. Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes.

Degree: Docteur es, Géochimie et écotoxicologie, 2010, Université de Bordeaux I

URL: http://www.theses.fr/2010BOR14060

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La baie de Marennes Oléron, premier site ostréicole français, est influencée par la pollution polymétallique historique de l’estuaire de la Gironde avec des concentrations en… (more)

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La baie de Marennes Oléron, premier site ostréicole français, est influencée par la pollution polymétallique historique de l’estuaire de la Gironde avec des concentrations en cadmium dans les huîtres proches de la limite de consommation européenne (RNO 2006; 5 μg.g-1 ps, ECNo.466/2001). Ces travaux de recherche pluridisciplinaires ont pour objectif de caractériser le comportement des ETM en zone côtière et les mécanismes de contamination en ETM des huîtres, spécifiquement en Cd, dans la baie de Marennes Oléron. Pour cela, sept missions océanographiques en période contrastée ont permis de caractériser la spéciation des ETM à l’embouchure des estuaires de la Charente et de la Gironde ainsi qu’au Pertuis de Maumusson.Une étude spatio-temporelle complémentaire des sédiments de surface de la baie de Marennes Oléron a montré un enrichissement des sédiments de surface en Cd dans la zone sud baie,confirmant la connexion des eaux girondines et l’apport en Cd particulaire à la baie par le Pertuis de Maumusson. Cette zone sud a ainsi été choisie pour mener une transplantation d’huîtres pendant trois mois. L’hydrodynamique régionale, observée par imagerie satellite, a présenté unrôle important dans la distribution et la variation temporelle des concentrations en Cd dissous et particulaires minérales de la baie. La bioaccumulation en Cd des différents organes d’huîtres cultivées sur table a été plus importante que celle des huîtres cultivées directement sur le sol,suggérant le faible rôle de la diffusion de Cd par la remise en suspension des sédiments de surface et du microphytobenthos sur la bioaccumulation. De plus, le temps d’immersion étant relativement proche entre les deux conditions, nous suggérons que la voie trophique via le plankton pélagique participe à la contamination des huîtres en plus de la voie directe. Cette contribution de la voie trophique a été confirmée lors d’expérimentations en conditions contrôlées en laboratoire par le développement d’une méthode de traçage simultané des voies de contamination directe et trophique par ajouts d’isotopes stables de Cd, conduites pour des concentrations 10 fois supérieures à l’environnement et des concentrations réalistes observées en baie de Marennes Oléron (40 ng.l-1 et ~0.7 mg.kg-1).

The Marennes-Oléron Bay, hosting the largest oyster production in France, is influenced by thehistoric polymetallic pollution of the Gironde Estuary, with cadmium levels in oysters close tothe consumption limit level (5 μg.g-1 dw, EC No.466/2001). The aim of this pluridisciplinarywork was to characterize the behaviour of trace metals in the coastal zone and the mechanisms ofCd contamination in oysters in the Marennes Oléron Bay. Seven oceanographic cruises wereconducted during contrasting season to characterize trace metals behaviour and speciation in theGironde and Charente estuaries and the coastal zone. Then, a spatial and temporal study of tracemetals in the surface sediments of the Marennes-Oléron Bay showed punctual Cd-enrichedsediments in the southern part, reflecting the connexion…

Advisors/Committee Members: Schäfer, Jörg (thesis director), Baudrimont, Magalie (thesis director), Blanc, Gérard (thesis director).

Subjects/Keywords: Cadmium; Huîtres; Bioaccumulation; Contamination; Cadmium; Oyster; Bioaccumulation; Contamination

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Strady, E. (2010). Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes. (Doctoral Dissertation). Université de Bordeaux I. Retrieved from http://www.theses.fr/2010BOR14060

Chicago Manual of Style (16^th Edition):

Strady, Emilie. “Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes.” 2010. Doctoral Dissertation, Université de Bordeaux I. Accessed January 21, 2021. http://www.theses.fr/2010BOR14060.

MLA Handbook (7^th Edition):

Strady, Emilie. “Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes.” 2010. Web. 21 Jan 2021.

Vancouver:

Strady E. Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes. [Internet] [Doctoral dissertation]. Université de Bordeaux I; 2010. [cited 2021 Jan 21]. Available from: http://www.theses.fr/2010BOR14060.

Council of Science Editors:

Strady E. Mécanismes biogéochimiques de la contamination des huîtres Crassostrea gigas en Cadmium en baie de Marennes Oléron : Study of molecular mechanisms of stress response in Oenococcus oeni and implementation of tools for the functional exploration of enological genes. [Doctoral Dissertation]. Université de Bordeaux I; 2010. Available from: http://www.theses.fr/2010BOR14060

Université de Lorraine

26. Aharchaou, Imad. Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects.

Degree: Docteur es, Écotoxicologie, biodiversité, écosystèmes, 2017, Université de Lorraine

URL: http://www.theses.fr/2017LORR0014

►

L’écotoxicité des éléments traces vis-à-vis du vivant est contrôlée par leur bioaccessibilité, leur biodisponibilité et leurs interactions avec le(s) site(s) d’action à l’intérieur des organismes.… (more)

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L’écotoxicité des éléments traces vis-à-vis du vivant est contrôlée par leur bioaccessibilité, leur biodisponibilité et leurs interactions avec le(s) site(s) d’action à l’intérieur des organismes. Dans le cas des certains éléments, l’existence dans le milieu naturel de plusieurs formes redox ayant des propriétés différentes doit aussi être prise en considération. Dans le cas spécifique du Cr, le consensus général considère le Cr(III) comme moins écotoxique que le Cr(VI). Toutefois, plusieurs études récentes soulignent que ce consensus devrait être réexaminé. Plus particulièrement, une connaissance insuffisante de la spéciation du Cr(III) pendant les tests en laboratoire pourrait avoir conduit à une sous-estimation de sa biodisponibilité et écotoxicité. Ce travail de thèse s’intéresse donc aux relations entre spéciation, biodisponibilité et bioaccumulation du Cr(III) et Cr(VI) dans différents modèles biologiques pour mieux appréhender leur potentiel écotoxique ainsi que leurs mécanismes d’interaction avec le vivant. Des études ont été menées chez les algues Pseudokirchneriella subcapitata et Chlamydomonas reinhardtii, le bivalve Corbicula fluminea et des cultures de cellules d’ovaire d’hamster chinois (CHO). L’ensemble des résultats de ce travail suggère que la validité du paradigme ‘le Cr(VI) est plus écotoxique que le Cr(III)’ serait dépendante des conditions d’exposition et du modèle biologique utilisé. Ce paradigme, accepté tant par la communauté scientifique que par les gestionnaires environnementaux, nécessite donc un réexamen afin d’assurer une meilleure gestion des risques liés au Cr

The ecotoxicity of the trace elements to the living organisms is controlled by their bioaccessibility, their bioavailability and their interactions with the site(s) of action inside the organisms. In the case of certain elements, the existence in the natural environment of several redox forms having different properties must also be taken into consideration. In the specific case of Cr, general consensus considers Cr(III) to be less ecotoxic than Cr(VI). However, several recent studies highlight that this consensus should be re-examined. In particular, insufficient knowledge of Cr(III) speciation during laboratory tests may have led to an underestimation of its bioavailability and ecotoxicity. This work focuses on the relationship between speciation, bioavailability and bioaccumulation of Cr(III) and Cr(VI) in different biological models in order to better understand their ecotoxic potential as well as their mechanisms of interaction with living organisms. Studies have been conducted on the algae Pseudokirchneriella subcapitata and Chlamydomonas reinhardtii, the bivalve Corbicula fluminea and cultures of Chinese hamster ovary cells (CHO). The results of this work suggest that the validity of the paradigm ‘Cr(VI) is more ecotoxic than Cr(III)’ would be dependent on the exposure conditions and the used biological model. This paradigm, accepted by both the scientific community and the environmental managers, requires a reassessment…

Advisors/Committee Members: Vignati, Davide (thesis director), Battaglia, Eric (thesis director).

Subjects/Keywords: Chrome; Speciation; Bioaccumulation; Écotoxicité; Chromium; Speciation; Bioaccumulation; Ecotoxicity; 572.525 3; 628.52

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aharchaou, I. (2017). Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2017LORR0014

Chicago Manual of Style (16^th Edition):

Aharchaou, Imad. “Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects.” 2017. Doctoral Dissertation, Université de Lorraine. Accessed January 21, 2021. http://www.theses.fr/2017LORR0014.

MLA Handbook (7^th Edition):

Aharchaou, Imad. “Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects.” 2017. Web. 21 Jan 2021.

Vancouver:

Aharchaou I. Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects. [Internet] [Doctoral dissertation]. Université de Lorraine; 2017. [cited 2021 Jan 21]. Available from: http://www.theses.fr/2017LORR0014.

Council of Science Editors:

Aharchaou I. Écotoxicité et bioaccumulation du Cr(III) et du Cr(VI) : spéciation, biodisponibilité et effets biologiques : Ecotoxicity and bioaccumulation of Cr(III) and Cr(VI) : speciation, bioavailability and biological effects. [Doctoral Dissertation]. Université de Lorraine; 2017. Available from: http://www.theses.fr/2017LORR0014

University of Johannesburg

27. De Klerk, Leanie Petro. The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/11860

►

M.Sc. (Aquatic Health)

Previous studies showed that the upper reaches of the Taaibosspruit catchment in the north eastern region of the Free State, contains elevated… (more)

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M.Sc. (Aquatic Health)

Previous studies showed that the upper reaches of the Taaibosspruit catchment in the north eastern region of the Free State, contains elevated concentrations of mercury in the sediment. Additional laboratory-based bioaccumulation studies with sediment-dwelling Chironomidae larvae revealed that the mercury was in a bioavailable form, but it was uncertain to what extent this mercury was in the methylated organic form. Therefore, a study to assess the extent of inorganic- and methylmercury contamination in the water and sediment, as well as the uptake of this pollutant by aquatic and aquatic associated biota was undertaken. This study tested the hypothesis that bioaccumulation of mercury occurs in the different trophic levels of the upper reaches of the Taaibosspruit ecosystem. The objectives of this study were to determine the spatial and temporal physico-chemical characteristics of the water and sediment of the Taaibosspruit system; to determine the extent of mercury distribution within the water and sediment of the Taaibosspruit system; to determine the degree of bioaccumulation and possible biomagnification of mercury by the biota from the different trophic levels of the ecosystem in the Taaibosspruit system; to determine the distribution of cadmium, chromium, copper, lead, manganese and uranium within the water and sediment of this system, as well as the degree of bioaccumulation of these metals by invertebrates and fish; and to determine whether the aquatic macroinvertebrate community structures change along the mercury pollution gradient in the Taaibosspruit system. Sampling was done bi-annually at five sites during late high- and late low flow periods. The reference site is situated on a tributary of the Taaibosspruit, which is not directly influenced by discharges from the industrial complex. In situ water quality parameters were determined at each site and the following samples were collected: water, sediment, aquatic rnacroinvertebrates, vertebrates (fish and amphibian species), as well as noninvasive tissue from birds (feathers). The physico-chemical characteristics of the water were determined by measuring the chlorophyll-a concentrations, nutrient levels and suspended solid content. The sediment was analysed for organic content, water content, as well as sediment particle size distribution. The methylmercury concentrations in the water, sediment and biotic components were determined through cold vapour atomic fluorescence spectrometry, whilst inorganic mercury, cadmium, chromium, copper, lead, manganese and uranium concentrations in these samples were determined through inductively coupled plasma mass spectrometry. All analyses were subjected to appropriate quality analysis and quality control procedures. The relationship between environmental mercury exposure and biological effects was determined using changes in the macroinvertebrate community assemblage structure as the biological endpoint. The invertebrate samples were retained for enumeration and lower taxonomic…

Subjects/Keywords: Mercury - Bioaccumulation - South Africa - Free State; Heavy metals - Bioaccumulation - South Africa - Free State; Bioaccumulation - South Africa - Free State

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

De Klerk, L. P. (2014). The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/11860

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

De Klerk, Leanie Petro. “The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa.” 2014. Thesis, University of Johannesburg. Accessed January 21, 2021. http://hdl.handle.net/10210/11860.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

De Klerk, Leanie Petro. “The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa.” 2014. Web. 21 Jan 2021.

Vancouver:

De Klerk LP. The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10210/11860.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

De Klerk LP. The bioaccumulation of mercury and other metals in the Taaibosspruit system, Sasolburg, South Africa. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/11860

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

28. Tsai, Wan-Jiun. Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area.

Degree: Master, Marine Biotechnology and Resources, 2010, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0830110-162127

► Abstract The objective of this study is to investigate the heavy metal pollution in our environment by sampling and analyzing the concentration of heavy metal… (more)

▼ Abstract The objective of this study is to investigate the heavy metal pollution in our environment by sampling and analyzing the concentration of heavy metal in seawater, sediment, and aquatic organisms from the seaside along the Chang-hua Coastal Industrial Park. The Chang-hua Coastal Industrial Park, located by the west coast of Chung-hua county in middle Taiwan, is a large-scale and multi-functional industrial estate with industrial production, residence and leisure possibilities. Hsienhsi District is situated at the northern part of the Industrial Park. Lukang District is at the southern part. In the middle of it, it is Lunwei District. In the Chung-hua Coastal Industrial Park, there are the second most electroplate and metal coating factories in Taiwan. Metal waste from the process of electroplating and coasting could easily pollute the tidal flat in Chang-hua Coastal Industrial Park. In order to prevent potential pollution taking place, this study took seawater, segment, and the aquatic organisms from the coast of the Chung-hua Coastal Industrial Park to monitoring the concentration level of copper(Cu), zinc(Zn), nickel(Ni), lead(Pb), chromium(Cr) and cadmium(Cd) in each index. The bioconcentration factor (BCF) indicates distinctions of accumulation in various matrixes. Especially from BCFW and BCFS demonstrate that soldier crab is a better index to illustrate the accumulation of Pb and Cr. Muricidae is a better index for showing Cd accumulating concentration. Furthermore, saccostreamordax is the best index for illustrating accumulative level of Ni. Oyster is better in showing accumulating of Cu and Zn. Though each organism shows distinct accumulation of particular metal, they can still illustrate the concentration of other selected metals to image the pollution of the environment. The comparison of metal accumulating levels in seawater, segment, and aquatic organisms from each test site demonstrated: the heavy metal concentration at site2 was much higher than at the other sites. The second most heavy metal concentration was at site6 and site8. Matrixes at site4 contained the lowest heavy metal concentration. The result was thought to be caused by current capacities of factories in three districts of Chang-hua Coastal Industrial Park. Site2 was at Hsienhsi Districtin, in which contained about 58% of factories in residence. In Lukang District, it reached the highest-77%-where was site 6 and site 8. In terms of Site4, it situated at Lunwei District, where was Lunwei Harbor Reservation with least development following by least capacity of factories. Furthermore, without a sound environmental-protection biological sewage treatment device, residues and chemical waste produced from various highly contaminant industries would bring about this concentration comparison result as well. Advisors/Committee Members: Wei-Hsien Wang (committee member), Chi-Hsin Hsu (chair), Jung-Hui Chen (chair).

Subjects/Keywords: biomonitor; bioconcentration factor; heavy metal; bioaccumulation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tsai, W. (2010). Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0830110-162127

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tsai, Wan-Jiun. “Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area.” 2010. Thesis, NSYSU. Accessed January 21, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0830110-162127.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tsai, Wan-Jiun. “Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area.” 2010. Web. 21 Jan 2021.

Vancouver:

Tsai W. Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area. [Internet] [Thesis]. NSYSU; 2010. [cited 2021 Jan 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0830110-162127.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tsai W. Investigation of the heavy metal contents in the environment and aquatic organisms of Chang-hua coastal area. [Thesis]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0830110-162127

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universiteit Utrecht

29. Candido, A. The CBR approach in measuring toxicity of narcotic chemicals.

Degree: 2010, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/188851

► Over the past years, the risk assessment of organic chemicals such as Persistent, bioaccumulative and toxic compounds (PBTs) and Persistent organic pollutants (POPs) has received… (more)

Subjects/Keywords: Critical body residue; bioaccumulation; narcotic chemicals

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Candido, A. (2010). The CBR approach in measuring toxicity of narcotic chemicals. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/188851

Chicago Manual of Style (16^th Edition):

Candido, A. “The CBR approach in measuring toxicity of narcotic chemicals.” 2010. Masters Thesis, Universiteit Utrecht. Accessed January 21, 2021. http://dspace.library.uu.nl:8080/handle/1874/188851.

MLA Handbook (7^th Edition):

Candido, A. “The CBR approach in measuring toxicity of narcotic chemicals.” 2010. Web. 21 Jan 2021.

Vancouver:

Candido A. The CBR approach in measuring toxicity of narcotic chemicals. [Internet] [Masters thesis]. Universiteit Utrecht; 2010. [cited 2021 Jan 21]. Available from: http://dspace.library.uu.nl:8080/handle/1874/188851.

Council of Science Editors:

Candido A. The CBR approach in measuring toxicity of narcotic chemicals. [Masters Thesis]. Universiteit Utrecht; 2010. Available from: http://dspace.library.uu.nl:8080/handle/1874/188851

Technical University of Lisbon

30. Custódio, Ana Filipa Silva. Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax).

Degree: 2014, Technical University of Lisbon

URL: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/8270

►

Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia

In this study the effects of seawater temperature increase expected in climate change in bioaccumulation of… (more)

Subjects/Keywords: climate change; temperature; methylmercury; bioaccumulation; sea bass

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Custódio, A. F. S. (2014). Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax). (Thesis). Technical University of Lisbon. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/8270

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Custódio, Ana Filipa Silva. “Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax).” 2014. Thesis, Technical University of Lisbon. Accessed January 21, 2021. https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/8270.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Custódio, Ana Filipa Silva. “Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax).” 2014. Web. 21 Jan 2021.

Vancouver:

Custódio AFS. Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax). [Internet] [Thesis]. Technical University of Lisbon; 2014. [cited 2021 Jan 21]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/8270.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Custódio AFS. Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax). [Thesis]. Technical University of Lisbon; 2014. Available from: https://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/8270

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations