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1.
Justice, James R.
Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors.
Degree: Thesis (M.S.), 2013, Ball State University
URL: http://cardinalscholar.bsu.edu/handle/123456789/197432
► Freshwater ecosystems will likely become sinks for future silver loadings as a result of increased nanosilver (n-Ag) use in industrial and commercial applications. A series…
(more)
▼ Freshwater ecosystems will likely become sinks for future
silver loadings as a result of
increased nanosilver (n-Ag) use in industrial and commercial applications. A series of bioassays
was performed to assess how n-Ag toxicity may be influenced by abiotic factors associated with
natural freshwater ecosystems. Additionally, these bioassays provide insight into how
environmentally relevant concentrations of n-Ag may sublethaly affect the freshwater benthic
gastropod, Physa acuta, that plays pivotal roles in maintaining the structure and function of
freshwater ecosystems. In sediment with no benthic organic carbon (BOC), gastropod vital rates
decreased in treatments containing any n-Ag, gastropods in sediment with relatively low BOC
appeared to trade off growth for reproduction at high n-Ag treatments, while gastropod vital
rates in high BOC sediment remained unaffected at all nanosilver treatments. Sediment type
may abate nanosilver toxicity as a result of organic carbon content. Effects of n-Ag on gastropod
vital rates were not dependant on pH, suggesting aqueous pH does not directly influence n-Ag
toxicity. Nanosilver (0.2 μg/L) stressed gastropods, altering their growth and reproduction
tradeoff dynamics. Nanosilver concentrations modeled to exist in natural freshwaters, disrupted
gastropod ability to detect and respond to a natural predator, while greater n-Ag concentrations
stimulated gastropods to exhibit contaminant avoidance behavior and thereby attempted to flee
their habitat. This study provides direction in understanding how adverse n-Ag effects may be
influenced by abiotic parameters, while assessing sublethal effects of n-Ag on freshwater gastropods that are likely to occur in natural freshwater ecosystems, given current estimates of
environmental n-Ag concentrations.
Advisors/Committee Members: Bernot, Randall J. (advisor).
Subjects/Keywords: Nanostructured materials – Environmental aspects.; Silver – Environmental aspects.; Physa – Effect of pollution on.; Water – Pollution.
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APA (6th Edition):
Justice, J. R. (2013). Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors. (Masters Thesis). Ball State University. Retrieved from http://cardinalscholar.bsu.edu/handle/123456789/197432
Chicago Manual of Style (16th Edition):
Justice, James R. “Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors.” 2013. Masters Thesis, Ball State University. Accessed April 12, 2021.
http://cardinalscholar.bsu.edu/handle/123456789/197432.
MLA Handbook (7th Edition):
Justice, James R. “Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors.” 2013. Web. 12 Apr 2021.
Vancouver:
Justice JR. Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors. [Internet] [Masters thesis]. Ball State University; 2013. [cited 2021 Apr 12].
Available from: http://cardinalscholar.bsu.edu/handle/123456789/197432.
Council of Science Editors:
Justice JR. Nanosilver ecotoxicity : chronic effects on the freshwater gastropod, Physa acuta, and influence of abiotic factors. [Masters Thesis]. Ball State University; 2013. Available from: http://cardinalscholar.bsu.edu/handle/123456789/197432

Colorado School of Mines
2.
Gately, Thomas Joseph.
Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters.
Degree: MS(M.S.), Chemistry and Geochemistry, 2013, Colorado School of Mines
URL: http://hdl.handle.net/11124/21
► The rapid growth of nanotechnology, specifically the incorporation of engineered nanoparticles (ENP's) into various products, will almost certainly lead to their release into the environment.…
(more)
▼ The rapid growth of nanotechnology, specifically the incorporation of engineered nanoparticles (ENP's) into various products, will almost certainly lead to their release into the environment.
Silver nanoparticles (nano-Ag) have seen widespread use in consumer products as a result of their antimicrobial properties.
Silver ion (Ag+), is known to be toxic to a large variety of organisms, especially aquatic species. The release of Ag+ from nano-Ag under relevant
environmental conditions is not currently well understood, as many studies use unrealistically high concentrations. This is in part due to limitations in the techniques used to detect and characterize ENP's. Using Single Particle Inductively Coupled Plasma Mass Spectrometry (SP-ICP-MS), a newly developed method to examine ENPs we are able to detect and quantify both nano-Ag and Ag+ at part per trillion concentrations, considered a realistic
environmental level. In a collaborative study with the Trent University, PVP-coated 50 nm nano-Ag particles were introduced into several mesocosms within a lake. Their fate (particle number, dissolution) was monitored by a number of methods including SP-ICP-MS, FFF-ICPMS, and total Ag analysis. Before the experiment could proceed a preservation method was needed to allow sample transport from the Ontario Lake to the lab in Colorado. Flash freezing using liquid nitrogen was found to be an effective method for preserving the particles that there was minimal change to the particle size and number. The samples were stored at -80 degrees C until the time of analysis. 60 nm PVP capped particles were initially found to be 58.3 ± 5.3 nm and the flash frozen particles were found to be 58.4± 5.2 nm. A series of lab experiments were also performed using lake water in which the stability of nano-Ag particles was examined. The particles were found to decrease in diameter from 50 nm to 36 nm over the course of seven days. Particle number also decreased over the course of the experiment illustrating that further work on methodology is required. Typical decreases in particle number were on the order of 60% over the course of a week. The rate of particle loss/transformation was significantly slower when lake waters were filtered suggesting a role for other suspended sediments or biota in the process. Sterilization using autoclaving provided further evidence for the role of biota but results showed complex behavior depending on the methods used (e.g. filtration and autoclaving). This study further demonstrates the utility of SP-ICP-MS to detect, quantify and characterize ENPs, but further work is needed to fully understand the processes controlling nano-Ag stability in aquatic environments.
Advisors/Committee Members: Ranville, James F. (advisor), Higgins, Christopher P. (advisor), Braley, Jenifer C. (committee member).
Subjects/Keywords: stability; silver; nanoparticle; lake; ICP-MS; engineered; Nanoparticles – Environmental aspects; Silver ions – Toxicity testing; Aquatic organisms; Inductively coupled plasma mass spectrometry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gately, T. J. (2013). Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/21
Chicago Manual of Style (16th Edition):
Gately, Thomas Joseph. “Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters.” 2013. Masters Thesis, Colorado School of Mines. Accessed April 12, 2021.
http://hdl.handle.net/11124/21.
MLA Handbook (7th Edition):
Gately, Thomas Joseph. “Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters.” 2013. Web. 12 Apr 2021.
Vancouver:
Gately TJ. Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters. [Internet] [Masters thesis]. Colorado School of Mines; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11124/21.
Council of Science Editors:
Gately TJ. Advanced ICP-MS methods for examining the stability of silver nanoparticles in natural waters. [Masters Thesis]. Colorado School of Mines; 2013. Available from: http://hdl.handle.net/11124/21

Northeastern University
3.
Pourzahedi, Leila.
Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks.
Degree: PhD, Department of Civil and Environmental Engineering, 2016, Northeastern University
URL: http://hdl.handle.net/2047/D20212409
► Forecasts show rapid expansion of the nanotechnology industry, with a global annual growth rate of more than 20% through this decade. Despite the performance benefits…
(more)
▼ Forecasts show rapid expansion of the nanotechnology industry, with a global annual growth rate of more than 20% through this decade. Despite the performance benefits of using engineered nanomaterials (ENMs) for various applications, the environmental and health implications are not yet fully understood. Uncertainties still exist regarding potential nanomaterial emissions, their fate and transport in the environment, the human or environmental exposure and effects, and their relationship to particle specific characteristics. To address the environmental concerns, this research developed and applied life cycle assessment (LCA) models to evaluate ENMs and nano-enabled products.; LCA is a multi-criteria, systems analysis tool for quantifying their ecological and human health impacts of different products and processes during their life cycle, from material extraction to end-of-life. Environmental LCA entails coupled emission inventory, fate and transport, exposure, and effect modeling of pollutants, linking nanomaterials and nano-enabled products to various impact categories, including global warming potential, human health effects, and ecotoxicity. Four core nano-LCA studies were carried out, including: evaluation of a nanosilver-enabled commercial bandage from its material extraction to disposal, comparison of various nanosilver synthesis routes, investigation of contribution from nanosilver to production environmental impacts of various nanosilver containing products, and quantification of life cycle benefits of using nanotechnology as a substitute for conventional systems for a case of carbon nanotube-enabled electromagnetic interference (EMI) shields for satellites.; In contrast to the focus on nanomaterial releases in the literature, nanosilver synthesis impacts were shown to be of significance, driven by the upstream indirect impacts from silver extraction, regardless of the nanoparticle synthesis method. Ecotoxicity impacts of ENM manufacturing were found to be several times those of direct particle release during product use and disposal. The contribution of nanosilver to the overall burdens of nano-enabled product manufacturing was shown to be a function of nanosilver loading, product composition, and particle surface area. Finally, net energy benefits were established for the case of carbon nanotube EMI shielding in terms of savings in weight, fuel use and primary energy demand.; This work makes meaningful contributions to the field of nano-LCA through generation of consistent and comparative life cycle inventory data sets on manufacturing nanoparticles and nano-enabled products, as well as model development through function-based expression of results. Findings of these studies could potentially influence material and process selection, help prioritize of research and development measures including green chemistry efforts, and guide evolving policy discussions on nano labeling and regulation.
Subjects/Keywords: environmental impact assessment; life cycle assessment; nanotechnology; silver nanoparticles; Nanostructured materials; Environmental aspects; Nanostructured materials; Health aspects; Carbon nanotubes; Nanoparticles; Silver; Industrial applications
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pourzahedi, L. (2016). Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks. (Doctoral Dissertation). Northeastern University. Retrieved from http://hdl.handle.net/2047/D20212409
Chicago Manual of Style (16th Edition):
Pourzahedi, Leila. “Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks.” 2016. Doctoral Dissertation, Northeastern University. Accessed April 12, 2021.
http://hdl.handle.net/2047/D20212409.
MLA Handbook (7th Edition):
Pourzahedi, Leila. “Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks.” 2016. Web. 12 Apr 2021.
Vancouver:
Pourzahedi L. Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks. [Internet] [Doctoral dissertation]. Northeastern University; 2016. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/2047/D20212409.
Council of Science Editors:
Pourzahedi L. Environmental impact assessment of nanoparticles and nano-enabled products using LCA frameworks. [Doctoral Dissertation]. Northeastern University; 2016. Available from: http://hdl.handle.net/2047/D20212409

Hong Kong University of Science and Technology
4.
Wang, Jian.
Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma).
Degree: 2014, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-71656
;
https://doi.org/10.14711/thesis-b1334217
;
http://repository.ust.hk/ir/bitstream/1783.1-71656/1/th_redirect.html
► Along with the extensive application of silver nanoparticles (AgNPs), growing concerns have been paid to their potential risks on aquatic organisms. The present study investigated…
(more)
▼ Along with the extensive application of silver nanoparticles (AgNPs), growing concerns have been paid to their potential risks on aquatic organisms. The present study investigated the potential risk of AgNPs on marine fish, including both waterborne and dietary AgNPs exposures. In the waterborne exposure, we found that fast aggregation of AgNPs would proceed immediately in the high saline medium (>15 psu), while the addition of Tween 20 (20 μM ) could well stabilize AgNPs against aggregation even in the 30 psu salinity medium. Uptake rate constants (ku) of AgNPs were less than half of the soluble Ag at low salinities (1 and 5 psu), while limited bioavailability of c-AgNPs was observed at high salinities (15 and 30 psu). However, the Tween 20 stabilized AgNPs (t-AgNPs) were accumulated by medaka at comparable rate as the soluble Ag, indicating the importance of dispersion for bioavailability of AgNPs in a highly ionic environment. In the dietary exposure, we found that the assimilation efficiency (AE) of Ag (AgNO3, 20 and 80 nm AgNPs) from contaminated brine shrimp in the medaka was quite low (<6%) and independent of food Ag (20 nm AgNPs) concentration. However, even this small amount of assimilated Ag (from AgNPs contaminated food) generated toxic effects (e.g., inhibition of Na+/K+-ATPase and SOD activity, reduction of total body length and WC) on medaka during the 28-day chronic dietary exposure. The overall study highlighted the potential of AgNPs-contaminated food by generating toxicity to marine fish, while less impact was likely from the waterborne exposure in the high saline environment.
Subjects/Keywords: Marine fishes
; Effect of heavy metals on
; Water
; Pollution
; Toxicology
; Nanoparticles
; Oryzias latipes
; Silver
; Environmental aspects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, J. (2014). Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma). (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-71656 ; https://doi.org/10.14711/thesis-b1334217 ; http://repository.ust.hk/ir/bitstream/1783.1-71656/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wang, Jian. “Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma).” 2014. Thesis, Hong Kong University of Science and Technology. Accessed April 12, 2021.
http://repository.ust.hk/ir/Record/1783.1-71656 ; https://doi.org/10.14711/thesis-b1334217 ; http://repository.ust.hk/ir/bitstream/1783.1-71656/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Jian. “Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma).” 2014. Web. 12 Apr 2021.
Vancouver:
Wang J. Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma). [Internet] [Thesis]. Hong Kong University of Science and Technology; 2014. [cited 2021 Apr 12].
Available from: http://repository.ust.hk/ir/Record/1783.1-71656 ; https://doi.org/10.14711/thesis-b1334217 ; http://repository.ust.hk/ir/bitstream/1783.1-71656/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang J. Biokinetic process and toxicity of silver nanoparticles in marine medaka (oryzias melastigma). [Thesis]. Hong Kong University of Science and Technology; 2014. Available from: http://repository.ust.hk/ir/Record/1783.1-71656 ; https://doi.org/10.14711/thesis-b1334217 ; http://repository.ust.hk/ir/bitstream/1783.1-71656/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado School of Mines
5.
Mitrano, Denise Marie.
Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems.
Degree: PhD, Chemistry and Geochemistry, 2013, Colorado School of Mines
URL: http://hdl.handle.net/11124/78739
► The ubiquitous use of goods containing nanoparticles (NPs) will lead inevitably to environmental release and interaction with biota. Methods to detect, quantify, and characterize NPs…
(more)
▼ The ubiquitous use of goods containing nanoparticles (NPs) will lead inevitably to
environmental release and interaction with biota. Methods to detect, quantify, and characterize NPs in
environmental matrices are highlighted as one of the areas of highest priority research in understanding potential
environmental and health risks. Specifically, techniques are needed to determine the size and concentration of NPs in complex matrices. Particular analytical challenges include distinguishing NPs from other constituents of the matrix (i.e. natural particles, humic substances, and debris), method detection limits are often higher than exposure concentrations, and differentiating dissolved metal and NPs. This work focuses on the development and optimization of two methods that address a number of challenges for nanometrology: single particle (sp)ICP-MS and asymmetrical flow field flow fractionation (AF4)-ICP-MS. Advancements in the spICP-MS method included systematic studies on distinction between ionic and NP fractions, resolution of polydisperse NP samples, and defining the techniques' dynamic range (in terms of both particle size and concentration). Upon application of the technique,
silver (Ag) NPs were discovered in raw wastewater treatment plant influent and effluent. Furthermore, methodical Ag NP stability studies determined the influence of particle capping agents and water chemistry parameters in a variety of synthetic, natural and processed waters. Method development for AF4-ICP-MS revolved around optimizing run conditions (i.e. operational flows, carrier fluid, membrane choice) to study detection limits, sample recovery, and resolution of polydisperse samples. Practical studies included sizing Ag NP in a sediment-dwelling, freshwater oligochaete (Lumbriculus variegatus) and the kinetics of accumulation of protein bound Ag+. In direct comparison, spICP-MS was found to be more versatile with less sample preparation and lower total analyte detection limit (ng/L vs. [micron]g/L), though AF4-ICP-MS could detect smaller particle sizes (2 nm vs. 25 nm) and elucidate NP/matrix interactions for changes in particle hydrodynamic diameter. Additionally, spICP-MS afforded us the opportunity to determine the kinetic rate of Ag NP dissolution rate kinetics at environmentally relevent concentrations, the first study of its kind. We found significantly variable dissolution rates for differently capped NPs in addition to water chemistries. Tannic acid capping agent was least resistant to dissolution compared to citrate and PVP, while high concentrations of natural organic matter seemed to stabilize the particles over time in comparison to DI water. The residual chlorine in tap water increased the dissolution rates of all particles dramatically, which we hypothesize to be due to residual chlorine. Herein is described method development protocol and results of aforementioned studies comparing sp and AF4 ICP-MS and supporting their use as choice nanometrology techniques for quantitative
environmental and toxicological studies.
Advisors/Committee Members: Ranville, James F. (advisor), Higgins, Christopher P. (committee member), Voelker, Bettina M. (committee member), Richards, Ryan (committee member), Figueroa, Linda A. (committee member).
Subjects/Keywords: nanotechnology; analytical; characterization; metrology; silver; Inductively coupled plasma mass spectrometry; Chemistry – Nanotechnology; Metallic oxides – Environmental aspects; Soils – Analysis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mitrano, D. M. (2013). Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/78739
Chicago Manual of Style (16th Edition):
Mitrano, Denise Marie. “Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems.” 2013. Doctoral Dissertation, Colorado School of Mines. Accessed April 12, 2021.
http://hdl.handle.net/11124/78739.
MLA Handbook (7th Edition):
Mitrano, Denise Marie. “Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems.” 2013. Web. 12 Apr 2021.
Vancouver:
Mitrano DM. Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11124/78739.
Council of Science Editors:
Mitrano DM. Development of ICP-MS based nanometrology techniques for characterization of silver nanoparticles in environmental systems. [Doctoral Dissertation]. Colorado School of Mines; 2013. Available from: http://hdl.handle.net/11124/78739

University of Hong Kong
6.
Degger, Natalie.
Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles.
Degree: 2013, University of Hong Kong
URL: http://hdl.handle.net/10722/211562
Subjects/Keywords: Oryzias
- Effect of water pollution on; Silver
- Environmental aspects
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Degger, N. (2013). Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/211562
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Degger, Natalie. “Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles.” 2013. Thesis, University of Hong Kong. Accessed April 12, 2021.
http://hdl.handle.net/10722/211562.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Degger, Natalie. “Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles.” 2013. Web. 12 Apr 2021.
Vancouver:
Degger N. Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles. [Internet] [Thesis]. University of Hong Kong; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10722/211562.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Degger N. Disruption of
steroidogenesis and reproduction in marine medaka (oryzias
melastigma) upon water and dietary exposure to silver
nanoparticles. [Thesis]. University of Hong Kong; 2013. Available from: http://hdl.handle.net/10722/211562
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong
7.
Shang, Zhaorong.
A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model.
Degree: 2001, University of Hong Kong
URL: http://hdl.handle.net/10722/31176
Subjects/Keywords: Silver
- Isotopes.;
Radioisotopes.;
Radioactive pollution - Environmental aspects.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shang, Z. (2001). A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/31176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shang, Zhaorong. “A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model.” 2001. Thesis, University of Hong Kong. Accessed April 12, 2021.
http://hdl.handle.net/10722/31176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shang, Zhaorong. “A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model.” 2001. Web. 12 Apr 2021.
Vancouver:
Shang Z. A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model. [Internet] [Thesis]. University of Hong Kong; 2001. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10722/31176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shang Z. A study of Ag-110m in
aquatic and terrestrial ecosystems and the development of a
radioecological model. [Thesis]. University of Hong Kong; 2001. Available from: http://hdl.handle.net/10722/31176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado School of Mines
8.
Gray, Evan P.
Detection and characterization of nanoparticles in aqueous media and biological tissues.
Degree: PhD, Civil and Environmental Engineering, 2015, Colorado School of Mines
URL: http://hdl.handle.net/11124/17072
► Robust methods to detect and characterize engineered nanoparticles (ENPs) in environmental samples are an urgent need given the increasing use of ENPs in consumer products.…
(more)
▼ Robust methods to detect and characterize engineered nanoparticles (ENPs) in
environmental samples are an urgent need given the increasing use of ENPs in consumer products. ENPs in consumer products partition to biosolids during wastewater treatment where they subsequently can be released to the environment through the land application of biosolids. Detailed information about ENP bioaccumulation and toxicity is difficult to obtain due to a lack of methodology that accurately describes exposure and bioaccumulated dose, specifically identifying size, particle number and mass distributions. As a first step in characterizing ENPs in
environmental samples, this work compared asymmetrical flow field flow fractionation (AF4) and hydrodynamic chromatography (HDC), both coupled to inductively coupled plasma mass spectrometry (ICP-MS), for use in characterizing ENPs in aqueous samples. Subsequent work used single particle ICP-MS (spICP-MS) detection coupled with a tetramethylammonium hydroxide (TMAH)-based extraction technique to examine ENP bioaccumulation in both Daphnia magna and Eisenia fetida. Direct comparison of separation procedures (AF4 and HDC) showed AF4 was capable of separating mixtures (5, 20, 50 and 100 nm) of gold ENPs with significantly greater resolution than HDC. However, HDC recoveries ranged from 77 to 96%, while recovery during AF4 ranged from 4 to 89%. The limits of detection for both techniques were found to be approximately 5 [mu] g L-1. Both AF4 and HDC coupled to ICP-MS are useful analytical approaches, though AF4 is limited by low recovery while HDC is limited by resolution. Subsequent work overcame these limitations by applying spICP-MS because it can resolve and recover ENPs. Tissue extraction using TMAH was capable of quantitatively liberating Au and Ag ENPs from ground beef, D. magna, and Lumbriculus variegatus. Using spICP-MS, ENP recovery was between 83-121% in all tissues. Validating exposure tests using D. magna showed tissue concentrations between 613 ± 230 [mu]g kg-1 wet weight (ww) and 59 ± 52 [mu]g kg-1 ww for aqueous exposures of 98 [mu]g L-1 100 nm Au and 4.8 [mu]g L-1 100 nm Ag ENPs. Particle size distributions determined from D. magna tissues suggested minimal shifts in the size distributions of ENPs accumulated, as compared to the exposure media. Chronic soil exposures of E. fetida at 5 mg kg-1 dw resulted in Ag bioaccumulation from 0.06 to 0.27 [mu]g kg-1 wet weight (ww) in a spiked artificial soil and 0.17 to 0.21 [mu]g kg-1 ww in a spiked biosolids-amended soil. ENPs were observed in E. fetida in both the dissolved Ag control and in the unspiked soil controls, suggesting ENPs can form in soil or may be present in unspiked soils. Future work should focus on further developing methods to identify ENP form and composition in both exposure media (soil, water) and exposed organisms to better identify transformation products, their bioavailability, and ultimately to identify any risks posed from ENP exposure.
Advisors/Committee Members: Higgins, Christopher P. (advisor), Ranville, James F. (committee member), Spear, John R. (committee member), Munakata Marr, Junko (committee member), Bednar, Anthony J. (committee member).
Subjects/Keywords: bioavailability; spICP-MS; silver; nanoparticles; Eisenia fetida; Nanoparticles – Environmental aspects; Nanoparticles – Toxicology; Bioavailability; Separation (Technology); Eisenia foetida; Bioaccumulation; Inductively coupled plasma mass spectrometry
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MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
Gray, E. P. (2015). Detection and characterization of nanoparticles in aqueous media and biological tissues. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/17072
Chicago Manual of Style (16th Edition):
Gray, Evan P. “Detection and characterization of nanoparticles in aqueous media and biological tissues.” 2015. Doctoral Dissertation, Colorado School of Mines. Accessed April 12, 2021.
http://hdl.handle.net/11124/17072.
MLA Handbook (7th Edition):
Gray, Evan P. “Detection and characterization of nanoparticles in aqueous media and biological tissues.” 2015. Web. 12 Apr 2021.
Vancouver:
Gray EP. Detection and characterization of nanoparticles in aqueous media and biological tissues. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2015. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11124/17072.
Council of Science Editors:
Gray EP. Detection and characterization of nanoparticles in aqueous media and biological tissues. [Doctoral Dissertation]. Colorado School of Mines; 2015. Available from: http://hdl.handle.net/11124/17072

Wright State University
10.
Dagher, Jessica M.
The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media.
Degree: MS, Chemistry, 2018, Wright State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527531069401526
► With the ubiquitous burst of nanotechnology, silver nanoparticles (AgNPs) have become indispensable in numerous industrial, medicinal, and research applications. Consequently, AgNPs have been alarmingly disposed…
(more)
▼ With the ubiquitous burst of nanotechnology,
silver
nanoparticles (AgNPs) have become indispensable in numerous
industrial, medicinal, and research applications. Consequently,
AgNPs have been alarmingly disposed into subsurface water
increasing the risk of human and
environmental exposure. While
mechanisms of AgNP cytotoxicity have been reported, research
studies on AgNP transport in subsurface water are needed, according
to U.S.
Environmental Protection Agency (EPA). The main goal of
this study was to investigate the
environmental fate and transport
of widely-used Creighton colloidal AgNPs in a laboratory transport
system simulating a porous, saturated groundwater aquifer. To
achieve this, a large volume of AgNPs was synthesized,
characterized using a suite of well-established analytical and
microscopy techniques, and manipulated by tangential flow
filtration. AgNPs and a conservative tracer, Cl- as a potassium
chloride solution, were pulse-injected upward through a
one-dimensional laboratory column (5 cm in depth, 2.5 cm diameter)
at fixed pH, flow rate, and ionic strength, and pore volume.
Breakthrough curves for AgNP transport were constructed using
UV-Vis absorption, flame atomic absorption spectroscopy (FAAS) and
inductively coupled plasma optical emission spectroscopy (ICP-OES).
Smaller AgNPs (1-20 nm in diameter) were found to elute faster than
larger AgNPs (1-100 nm in diameter). Flow rate and AgNP size were
found to influence the sorption of AgNPs onto the media, as
evidenced by the size and shape of the non-equilibrium breakthrough
curves. Facilitated transport was attributed to moderate
electrostatic repulsions between the negatively charged AgNPs and
the polar glass beads. The transport of the AgNPs through the one
dimensional laboratory system and the accurate ICP-OES-based
quantification of nanosilver concentration in colloidal samples
were translated into two novel laboratory experiment modules, which
were successfully implemented into the Experimental Nanomaterials
and Nanoscience course and the Instrumental Analysis laboratory
course at WSU respectively.
Advisors/Committee Members: Sizemore, Ioana (Advisor).
Subjects/Keywords: Chemistry; Environmental Management; Environmental Science; Environmental Studies; Nanoscience; Nanotechnology; Silver nanoparticles; nanotechnology; environmental transport; environmental and public health; silver; colloidal silver; ground water; subsurface water
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dagher, J. M. (2018). The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media. (Masters Thesis). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1527531069401526
Chicago Manual of Style (16th Edition):
Dagher, Jessica M. “The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media.” 2018. Masters Thesis, Wright State University. Accessed April 12, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1527531069401526.
MLA Handbook (7th Edition):
Dagher, Jessica M. “The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media.” 2018. Web. 12 Apr 2021.
Vancouver:
Dagher JM. The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media. [Internet] [Masters thesis]. Wright State University; 2018. [cited 2021 Apr 12].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527531069401526.
Council of Science Editors:
Dagher JM. The fate and one-dimensional transport of Creighton
colloidal silver nanoparticles through saturated porous
media. [Masters Thesis]. Wright State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1527531069401526

University of Montana
11.
Mocko, John P.
Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana.
Degree: MS, 2004, University of Montana
URL: https://scholarworks.umt.edu/etd/9228
Subjects/Keywords: Trace elements in water Montana Silver Bow Creek.; Hazardous waste sites Evaluation.; Hazardous waste sites Montana Silver Bow Creek.; Mines and mineral resources Environmental aspects Montana Silver Bow Creek.; Water Pollution Montana Silver Bow Creek.; Hazar
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mocko, J. P. (2004). Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/9228
Chicago Manual of Style (16th Edition):
Mocko, John P. “Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana.” 2004. Masters Thesis, University of Montana. Accessed April 12, 2021.
https://scholarworks.umt.edu/etd/9228.
MLA Handbook (7th Edition):
Mocko, John P. “Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana.” 2004. Web. 12 Apr 2021.
Vancouver:
Mocko JP. Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana. [Internet] [Masters thesis]. University of Montana; 2004. [cited 2021 Apr 12].
Available from: https://scholarworks.umt.edu/etd/9228.
Council of Science Editors:
Mocko JP. Spatial and temporal variation of mercury and other heavy metals in a stream contaminated by historic mining : Silver Bow Creek Silver Bow County Montana. [Masters Thesis]. University of Montana; 2004. Available from: https://scholarworks.umt.edu/etd/9228

Oregon State University
12.
Nix, Cassandra E.
A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61371
► Within the past two decades, the rise of nanotechnology has provided various technological and industrial sectors with avenues for significant growth and improvements to existing…
(more)
▼ Within the past two decades, the rise of nanotechnology has provided various technological and industrial sectors with avenues for significant growth and improvements to existing practices. With the inherent qualities which make materials on the nanoscale unique in behavior and function, there are limitless applications of nanotechnology. One of the predominant issues in the field is the lack of data addressing fate of nanomaterials, particularly in natural conditions. This is primarily due to the complexity of nanomaterial-
environmental reactions, as the small size and large reactive surface area of nanomaterials significantly complicate modeling processes. In addition to gaps in the literature concerning fate of nanomaterials, the regulation of nanomaterials are also of concern, as there are no specific provisions in United States law which specifically addresses nanomaterials. Although data gaps exist for many nanomaterials,
silver nanoparticles are one of the most well-studied nanomaterials. Due to their antimicrobial properties,
silver nanoparticles are used widely in consumer products. It has been demonstrated that
silver can continuously leach from the nanoparticle, and can enter wastewater streams, which may pose a risk to sensitive aquatic life. To potentially reduce the burden of
silver release from conventional
silver nanoparticles, our collaborators engineered a lignin-core particle doped with
silver ions and surface stabilized with a polycationic electrolyte layer. Our objective was to determine whether any of the formulation components elicit toxicological responses using embryonic zebrafish. Ionic
silver and free surface stabilizer were the most toxic constituents, although when associated separately or together with the lignin core, toxicity of the formulations
decreased significantly. Formulations containing
silver had a significantly higher prevalence of uninflated swim bladder and yolk sac edema. Comparative analysis of dialyzed samples, which intended to simulate post-consumer use, showed a significant increase in mortality as the samples aged, in addition to eliciting significant increases in types of sub-lethal responses relative to the non-dialyzed samples. ICP-OES/MS analysis indicated that
silver ion release from the particle into solution was continuous and the rate of release was component-specific. Overall, our study indicates that the lignin core is an effective alternative to conventional
silver nanoparticles for potentially reducing the burden of
silver released into the environment.
Advisors/Committee Members: Harper, Stacey L. (advisor), Stubblefield, William A. (committee member).
Subjects/Keywords: Silver
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nix, C. E. (2017). A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61371
Chicago Manual of Style (16th Edition):
Nix, Cassandra E. “A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles.” 2017. Masters Thesis, Oregon State University. Accessed April 12, 2021.
http://hdl.handle.net/1957/61371.
MLA Handbook (7th Edition):
Nix, Cassandra E. “A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles.” 2017. Web. 12 Apr 2021.
Vancouver:
Nix CE. A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1957/61371.
Council of Science Editors:
Nix CE. A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61371

Addis Ababa University
13.
GETACHEW, ATINTIE.
IMPLEMENTATION OF ISO 14001-BASED EMS
.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1598
► Organizations of all kinds are increasingly concerned with achieving and demonstrating sound environmental performance by controlling the impacts of their activities, products and services on…
(more)
▼ Organizations of all kinds are increasingly concerned with achieving and demonstrating
sound
environmental performance by controlling the impacts of their activities, products
and services on the environment, consistent with their
environmental policy and
objectives. MAB is one of the ISO 14001 certified breweries aiming at promoting
continual improvement in
environmental performance of organizations through adoption
and implementation of an
environmental management system. The objective of this study
is to investigate whether the company’s EMS has improved and resulted in
environmental, economic and other benefits. The research focuses on
environmental
policy,
environmental objectives, targets and programs, and monitoring and
measurement. Both primary and secondary data were used in the study. Interviewing,
observation and self-administered questionnaire were used to collect the primary data
from different sources, while EMS records of the company and various publications were
used as sources of secondary data. The company’s
environmental policy,
environmental
objectives, targets and programs, and monitoring and measurement as elements of EMS
were treated conforming to the requirements of ISO 14001:2004 standard throughout the
years 2005 – 2009. Overall elements of the company’s EMS were also treated
conforming to the requirements as observed from the combined assessments. The
company’s EMS was conformed to the requirements of ISO 14001:2004 and was
improving through time. It was also observed that some
environmental, economic and
social benefits were gained as a result of the company’s EMS implementation.
Strengthening operation and maintenance of the company’s EMS, and promoting and
supporting the development and expansion of ISO 14001-based EMS in the country in
general and in the brewing industry in particular is highly recommended.
Advisors/Committee Members: BELAY SIMANE (Ph.D) (advisor).
Subjects/Keywords: environmental aspects, environmental;
management system
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
GETACHEW, A. (2012). IMPLEMENTATION OF ISO 14001-BASED EMS
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1598
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
GETACHEW, ATINTIE. “IMPLEMENTATION OF ISO 14001-BASED EMS
.” 2012. Thesis, Addis Ababa University. Accessed April 12, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/1598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
GETACHEW, ATINTIE. “IMPLEMENTATION OF ISO 14001-BASED EMS
.” 2012. Web. 12 Apr 2021.
Vancouver:
GETACHEW A. IMPLEMENTATION OF ISO 14001-BASED EMS
. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Apr 12].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1598.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
GETACHEW A. IMPLEMENTATION OF ISO 14001-BASED EMS
. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1598
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
Yilmaz, Engin Burak.
THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM.
Degree: 2017, American University
URL: http://hdl.handle.net/1961/auislandora:84486
► The ecological degradation that we are facing today has the nature of a common goods problem, which presents itself on a global scale. Capitalism’s solution…
(more)
▼ The ecological degradation that we are facing today has the nature of a common goods problem, which presents itself on a global scale. Capitalism’s solution to the ecological crisis is the commodification and the integration of these goods into a market system, with cap-and-trade policies for GHG emissions, carbon taxes etc. Current multilevel environmental governance schemes don’t look at the root causes of the ecological crisis, which reside in capitalist forms of production. Commodification of Nature and common goods has implications for roles, responsibilities, capacities and legitimacy of nation-states in environmental politics. Global environmental governance schemes have multilevel governance structures that legitimizes non-state actors like ENGOs, transnational networks, epistemic communities, multinational and transnational companies etc. The legitimacy and capacity of nation-states, their overall activities, have not been effective against the ecological crisis that we face today. Thus, we see the formation of these multi-level environmental governance schemes that surpass nation-states in certain capacities.
International relations
School of International Service
Degree Awarded: M.A. School of International Service. American University
Advisors/Committee Members: Nicholson, Simon (Thesis advisor), Wapner, Paul (Thesis advisor).
Subjects/Keywords: Commodification – Environmental aspects; Capitalism – Environmental aspects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yilmaz, E. B. (2017). THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM. (Thesis). American University. Retrieved from http://hdl.handle.net/1961/auislandora:84486
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yilmaz, Engin Burak. “THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM.” 2017. Thesis, American University. Accessed April 12, 2021.
http://hdl.handle.net/1961/auislandora:84486.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yilmaz, Engin Burak. “THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM.” 2017. Web. 12 Apr 2021.
Vancouver:
Yilmaz EB. THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM. [Internet] [Thesis]. American University; 2017. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1961/auislandora:84486.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yilmaz EB. THE COMMODIFICATION OF NATURE, MULTILEVEL ENVIRONMENTAL GOVERNANCE SCHEMES, AND NATION-STATES IN ECOLOGICAL CAPITALISM. [Thesis]. American University; 2017. Available from: http://hdl.handle.net/1961/auislandora:84486
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Nelson Mandela Metropolitan University
15.
Okuah, Obrukevwe Anehwe.
A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment.
Degree: 2020, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/48588
► A lack of involvement by participants with traditional data collection methods for research has led to insufficient data regarding millennials’ worldviews on the coastal and…
(more)
▼ A lack of involvement by participants with traditional data collection methods for research has led to insufficient data regarding millennials’ worldviews on the coastal and marine environment. Understanding millennial worldviews could provide insights for policy interventions for sustainable use of the marine and coastal environment. The aim of this research is to design, develop and evaluate an appropriate social media method to elicit millennials’ worldviews on the coastal and marine environment. The methodology used for the research was Design Science Research (DSR), which is a legitimate approach to conducting research in the field of Information Systems. The methods used were a literature review, interviews with social media experts and Social Media Influencers (SMIs), and a focus group discussion with researchers from the field of social sciences. The proposed artefact (the method) can be used to provide guidance to researchers for engaging and eliciting opinions and worldviews of millennials on social media. The method includes a Social Media Influencer Model that illustrates the relationship between SMIs’ characteristics and techniques for engaging the public, and a Social Media Analytics (SMA) Process model that can guide researchers through the steps of eliciting worldviews from the public. Although there are several SMA techniques that can be used, the proposed method uses sentiment analysis as an SMA technique for deriving sentiments from social media data. The method was evaluated by researchers who require a social media method for eliciting millennials worldviews. The findings confirmed some of the techniques identified in literature as well as some additional techniques and processes. It was also evident that using this method could assist researchers for data collection and specifically to obtain worldviews on the marine and coastal environment. The contribution of this study is an artefact that fulfils the need for a social media method for data collection that is more convenient for researchers and millennials and can guide researchers through the steps of eliciting worldviews from the public.
Subjects/Keywords: Millennialism – Environmental aspects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Okuah, O. A. (2020). A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/48588
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Okuah, Obrukevwe Anehwe. “A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment.” 2020. Thesis, Nelson Mandela Metropolitan University. Accessed April 12, 2021.
http://hdl.handle.net/10948/48588.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Okuah, Obrukevwe Anehwe. “A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment.” 2020. Web. 12 Apr 2021.
Vancouver:
Okuah OA. A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2020. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10948/48588.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Okuah OA. A Social Media Method for Eliciting Millennials’ Worldviews on the Coastal and Marine Environment. [Thesis]. Nelson Mandela Metropolitan University; 2020. Available from: http://hdl.handle.net/10948/48588
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Soininen, Tiia.
Slow Tourism Now and in the Future.
Degree: 2011, Kajaanin ammattikorkeakoulu
URL: http://www.theseus.fi/handle/10024/37594
► This thesis consists of a research to a new tourism trend; slow tourism. Tourism industry alters continuously and new forms of tourism are created all…
(more)
▼ This thesis consists of a research to a new tourism trend; slow tourism. Tourism industry alters continuously and new forms of tourism are created all the time. The focus was given to slow tourism and travel because it has begun during the last decade in Italy from Slow Movement and it is an encounter to speed travelling and mass tourism.
Slow tourism was identified with travelling slowly, living in the local culture and valuing sustainability. The main goal in the research was to find out what slow tourism now and in the future is and what kind of customers there are in slow tourism.
The research formed of finding theoretical information about slow tourism and travel and conducting observations on tourism markets in the internet. Several secondary data for instance websites, news and articles were found about slow tourism in the theoretical part of the thesis. In the empirical research on slow tourism, products and services linked to slow tourism were further analysed by the principles of slow tourism.
Research showed that slow tourism is still a niche market and open for travellers who are middle-aged and may have bigger incomes than average. But according to findings in the research slow tourism has a relatively big potential to grow because it focuses on eco-friendly actions which are highlighted in today’s tourism, but also to relaxation with time in the busy world. Slow tourism corresponded to current and future trends in tourism and tourist behaviour. That is why the interest towards slow tourism should be maintained to see how this new trend will develop in the future.
Tämä opinnäytetyö koostuu tutkimuksesta uuteen matkailun trendiin; hitaaseen matkailuun. Matkailun toimiala muuttuu jatkuvasti ja uusia matkailun muotoja kehittyy koko ajan. Huomio keskitettiin hitaaseen matkailuun ja matkustamiseen, koska se on kehittynyt viime vuosikymmenellä Italiassa Slow-liikeestä vastaiskuna nopealle matkustamiselle ja massaturismille.
Hidas matkailu tunnistettiin hitaaksi matkustamiseksi, paikallisessa kulttuurissa elämiseksi arvostaen kestävän kehityksen matkailua. Päätavoite tutkimuksessa oli ottaa selvää mitä hidas matkailu on nyt ja tulevaisuudessa, sekä hitaan matkailun asiakkaiden kartoittaminen.
Tutkimus perustui teoreettisten lähteiden etsimiseen ja havainnointiin internetissä hitaan matkailun markkinoista. Lukuisia sekundaarisia lähteitä kuten nettisivuja, uutisia ja artikkeleita löydettiin opinnäytetyön teoreettiseen osaan. Hitaan matkailun empiirisessä tutkimuksessa tuotteita ja ohjelmia analysoitiin hitaan matkailun periaatteiden valossa.
Tutkimus näytti että hidas matkailu on vielä pieni markkina-alue matkailussa ja se on avoin keski-ikäisille, keski-vertoa varakkaammille matkailijoille. Tutkimuksen löytöjen perusteella hitaalla matkailulla on kuitenkin suhteelli-sen suuri mahdollisuus kasvaa, koska se panostaa ympäristöystävällisiin tekoihin jotka ovat korostettuina tämän päivän matkailussa. Lisäksi hidas matkailu kunnioittaa rentoutumista ajan kanssa kiireellisessä maailmassa.…
Advisors/Committee Members: Kajaanin ammattikorkeakoulu.
Subjects/Keywords: Tourism; Environmental aspects
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to Zotero / EndNote / Reference
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APA (6th Edition):
Soininen, T. (2011). Slow Tourism Now and in the Future. (Thesis). Kajaanin ammattikorkeakoulu. Retrieved from http://www.theseus.fi/handle/10024/37594
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Soininen, Tiia. “Slow Tourism Now and in the Future.” 2011. Thesis, Kajaanin ammattikorkeakoulu. Accessed April 12, 2021.
http://www.theseus.fi/handle/10024/37594.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Soininen, Tiia. “Slow Tourism Now and in the Future.” 2011. Web. 12 Apr 2021.
Vancouver:
Soininen T. Slow Tourism Now and in the Future. [Internet] [Thesis]. Kajaanin ammattikorkeakoulu; 2011. [cited 2021 Apr 12].
Available from: http://www.theseus.fi/handle/10024/37594.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Soininen T. Slow Tourism Now and in the Future. [Thesis]. Kajaanin ammattikorkeakoulu; 2011. Available from: http://www.theseus.fi/handle/10024/37594
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Ryerson University
17.
Triemstra-Johnston, Jennifer.
Challenging the fast fashion product: a method for use-value apparel design.
Degree: 2013, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A3239
► Sustainable apparel design is a discipline based on challenging the status quo. Applying an interdisciplinary approach, this paper integrates the methodologies of research through practice,…
(more)
▼ Sustainable apparel design is a discipline based on challenging the status quo. Applying an interdisciplinary approach, this paper integrates the methodologies of research through practice, sustainable design, and material culture to challenge contemporary products found on the fast fashion market. Exploring use-value as an avenue for sustainable design, a typology is developed addressing the identifiers of function, aesthetics, expression, and durability as a method for generating sustainable solutions. The interpretative methods of material culture are adapted into a use-value challenge as a process for establishing sustainable and unsustainable elements embedded within a product. The concept of best practices is introduced as a procedure for assessing the solutions for the creation of alternative prototypes. A case study, challenging children’s princess costumes found on the contemporary market, provides an example of how the use-value method for apparel design can be applied to fast fashion products.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Fashion design – Environmental aspects; Fashion – Environmental aspects; Clothing trade – Environmental aspects
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Triemstra-Johnston, J. (2013). Challenging the fast fashion product: a method for use-value apparel design. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A3239
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Triemstra-Johnston, Jennifer. “Challenging the fast fashion product: a method for use-value apparel design.” 2013. Thesis, Ryerson University. Accessed April 12, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A3239.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Triemstra-Johnston, Jennifer. “Challenging the fast fashion product: a method for use-value apparel design.” 2013. Web. 12 Apr 2021.
Vancouver:
Triemstra-Johnston J. Challenging the fast fashion product: a method for use-value apparel design. [Internet] [Thesis]. Ryerson University; 2013. [cited 2021 Apr 12].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3239.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Triemstra-Johnston J. Challenging the fast fashion product: a method for use-value apparel design. [Thesis]. Ryerson University; 2013. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3239
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi, Mehrdad.
Experimental evolution of silver nanoparticle resistance in Escherichia coli.
Degree: 2015, NC Docks
URL: http://libres.uncg.edu/ir/uncg/f/Tajkarimi_uncg_0154D_11551.pdf
► The recent exponential increase in the use of engineered nanoparticles (eNPs) means both greater intentional and unintentional exposure of eNPs to microbes. Intentional use includes…
(more)
▼ The recent exponential increase in the use of engineered nanoparticles (eNPs) means both greater intentional and unintentional exposure of eNPs to microbes. Intentional use includes the use of eNPs as biocides; unintentional exposure results from the fact that eNPs are included in a variety of commercial products (paints, sunscreens, cosmetics.) Many of these eNPs include heavy metals or metal oxides such as titanium dioxide, silver, gold, zinc and zinc oxide. The fact that early studies of the impact of metallic nanoparticles achieved approximately 90% lethality to Ag, Cu eNPs, suggests that genetic variants are already circulating in bacteria that can be co-opted to provide heavy metal eNP resistance. This project has utilized laboratory experimental evolution to evolve eNP resistance in the bacterium Escherichia coli (K12 MG1655 strain.). This is currently being validated by demonstrating the greater fitness of evolved strains versus ancestral strains in the presence of different sized and coated silver nanoparticles (10nm, 40nm, citrate-coated, PVP-coated) as well as phenotypic changes in the bacterial cell wall (as measured by Atomic Force Microscopy, AFM.). Finally, the bacterial genomes of the evolved and ancestral strains were resequenced. The genomic basis of this complex phenotype was determined. The practical application of such knowledge cannot be underestimated since nature is already evolving nanoparticle resistant bacteria. Thus knowledge of the nature of the physiological, morphological, and genomic mechanisms of resistance will be essential to deploy sustainable use of NPs as biocides, and to prevent unintentional environmental damage.
Subjects/Keywords: Silver $x Health aspects; Nanoparticles $x Health aspects; Drug resistance in microorganisms; Escherichia coli
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi, M. (2015). Experimental evolution of silver nanoparticle resistance in Escherichia coli. (Thesis). NC Docks. Retrieved from http://libres.uncg.edu/ir/uncg/f/Tajkarimi_uncg_0154D_11551.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi, Mehrdad. “Experimental evolution of silver nanoparticle resistance in Escherichia coli.” 2015. Thesis, NC Docks. Accessed April 12, 2021.
http://libres.uncg.edu/ir/uncg/f/Tajkarimi_uncg_0154D_11551.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi, Mehrdad. “Experimental evolution of silver nanoparticle resistance in Escherichia coli.” 2015. Web. 12 Apr 2021.
Vancouver:
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi M. Experimental evolution of silver nanoparticle resistance in Escherichia coli. [Internet] [Thesis]. NC Docks; 2015. [cited 2021 Apr 12].
Available from: http://libres.uncg.edu/ir/uncg/f/Tajkarimi_uncg_0154D_11551.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
NC DOCKS at The University of North Carolina at Greensboro; Tajkarimi M. Experimental evolution of silver nanoparticle resistance in Escherichia coli. [Thesis]. NC Docks; 2015. Available from: http://libres.uncg.edu/ir/uncg/f/Tajkarimi_uncg_0154D_11551.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of South Carolina
19.
Othman, Mohammed A.
Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa.
Degree: PhD, Environmental Health Sciences, 2020, University of South Carolina
URL: https://scholarcommons.sc.edu/etd/5936
► Silver nanoparticles (AgNPs) have attracted tremendous attention as a potential broadspectrum antimicrobial agent to overcome multidrug resistant (MDR) infections. However, a comprehensive understanding to…
(more)
▼ Silver nanoparticles (AgNPs) have attracted tremendous attention as a potential broadspectrum antimicrobial agent to overcome multidrug resistant (MDR) infections. However, a comprehensive understanding to AgNPs bactericidal mechanism of action and the relative role of particulate versus ionic Ag in AgNPs antibacterial activity is lacking but essential for their optimization for potential medical applications. Therefore, a novel method to separate and quantify Ag internalization in P. aeruginosa was developed and validated through multimethod approach. The methods used were optical density at 600 nm (OD600), LIVE/DEAD staining, transmission electron microscopy (TEM), and sorbed Ag liberation assays. After optimizing the method, it was applied to quantify Ag content in different bacterial fractions. To better understand the dynamic transformations of AgNPs upon exposure and the relative bioavailability/biouptake of different Ag species, bimetallic
[email protected] NPs was used and Ag:Au ratios were calculated in different bacterial compartments. Results showed a nearly constant OD600 within the first two hours of 50 mM EDTA treatment indicating complete bacterial growth cessation. However, bacterial density declined beyond this treatment condition indicating cell lysis. LIVE/DEAD staining images indicated intact bacterial membrane before- and after- EDTA treatment for six hours. Cell counts observed in untreated controls were statistically similar to cell counts after two hours exposure to EDTA. Whereas significantly (p <0.0001) fewer cells were observed in images after six hours EDTA exposure when compared to untreated controls. This suggested that complete disruption and lyses of cells may have occurred upon EDTA
exposures exceeding two hours rather than the simple cell membrane damage or/and increased permeability. TEM results indicated intact, smooth, and dense cell boundaries for untreated controls and cells exposed to EDTA for two hours. No membrane disintegrations were detected even after six hours EDTA treatment, but cells featured very light and thin surfaces near the cell edges compared to control. However, 50 mM EDTA treatment is a very high concentration and is expected to remove most of the periplasm. The plateau obtained in the Ag liberation curve, from the operationally defined sorbed fraction, within the first two hours of EDTA treatment suggested complete removal of sorbed Ag. Whereas the statistically significant (p <0.05) increase in Ag mass content after six hours EDTA treatment was likely as a result of cells lysis and/or increased membrane permeability. The weight of evidence across the multimethod approach suggested that two hours of EDTA treatment at a concentration of 50 mM provided a reproducible estimation of Ag uptake in the operationally defined internalized fraction approximating the accurate value in the Gram-negative bacterium P. aeruginosa. Therefore, this method was applied to quantify metallic distribution upon exposing bacteria to
[email protected] NPs. Ag distribution data indicated that the…
Advisors/Committee Members: Jamie R. Lead.
Subjects/Keywords: Environmental Health; Bacteria; Bioavailability; Biouptake; EDTA; Internalization; Silver Nanoparticles
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Othman, M. A. (2020). Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/5936
Chicago Manual of Style (16th Edition):
Othman, Mohammed A. “Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa.” 2020. Doctoral Dissertation, University of South Carolina. Accessed April 12, 2021.
https://scholarcommons.sc.edu/etd/5936.
MLA Handbook (7th Edition):
Othman, Mohammed A. “Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa.” 2020. Web. 12 Apr 2021.
Vancouver:
Othman MA. Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa. [Internet] [Doctoral dissertation]. University of South Carolina; 2020. [cited 2021 Apr 12].
Available from: https://scholarcommons.sc.edu/etd/5936.
Council of Science Editors:
Othman MA. Development, Validation, and Application of a Novel Method to Separate and Quantify Silver Intracellular Uptake in Pseudomonas aeruginosa. [Doctoral Dissertation]. University of South Carolina; 2020. Available from: https://scholarcommons.sc.edu/etd/5936

Western Washington University
20.
Walli, Claire A.
Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles.
Degree: MS, Environmental Sciences, 2019, Western Washington University
URL: https://cedar.wwu.edu/wwuet/877
► Silver nanoparticles (AgNPs) are increasing in presence in commercial and medical products due to their bactericidal properties and can be transported into the environment…
(more)
▼ Silver nanoparticles (AgNPs) are increasing in presence in commercial and medical products due to their bactericidal properties and can be transported into the environment during the laundering, use, and waste of those products. Strong evidence suggests aqueous
silver (Ag
+) dissolved from the AgNP surface is the toxic component of AgNPs but there is no consensus on the possibility of additional nanoparticle-specific properties that elicit toxicity. Ag
+ toxicity to freshwater organisms has been well studied using the Biotic Ligand Model (BLM), which describes how water quality conditions, such as the concentrations of certain freshwater ions, affect the toxicity of Ag
+. Some freshwater ions also cause AgNPs to aggregate, which can reduce the surface area from which Ag
+ can dissolve. The sensitivity of AgNPs to water quality conditions has made studying their toxicity challenging in part because the range of acceptable water quality conditions in standardized toxicity testing methods produces different AgNP toxicity results.
This study assessed the impacts of the freshwater ions Ca
2+, Na
+, Cl
-, and SO
42- on AgNP toxicity and chemical behavior in ASTM acute
Daphnia magna toxicity testing conditions. Toxicity and analytical tests were performed in experimental waters created by adding fixed concentrations of NaCl, CaCl
2, and Na
2SO
4 to ASTM moderately hard water (MHW) in a factorial design. AgNP sedimentation was measured using UV-Vis, and particle size distribution and particle concentration were measured using the single particle ICP-MS technique. LC50s for experimental waters ranged from 53.48 – 383.52 μg/L. NaCl and CaCl
2 reduced toxicity in comparison to MHW. The rank order for AgNP LC50s in the experimental waters was the same as the rank order that the BLM predicted for Ag
+ toxicity indicating that Ag
+ dissolved from the AgNP may have been responsible for some of the AgNP toxicity. However, CaCl
2 reduced toxicity more than the BLM predicted should happen based on Ag
+ and there was a much larger interaction effect between CaCl
2 and NaCl than was predicted. CaCl
2 significantly increased particle size and sedimentation rates, which was concluded to be caused by the Ca
2+. An interaction effect between CaCl
2 and NaCl was also observed for sedimentation, which appeared to be due to the doubled Cl
- concentration. AgNP aggregation was likely responsible for the differences between the AgNP toxicity results and the predictions of the BLM supporting that the BLM is not able to completely characterize all of the factors that affect AgNP toxicity.
Advisors/Committee Members: Sofield, Ruth M., Bingham, Brian L., 1960-, Emory, Steven R..
Subjects/Keywords: Environmental Sciences; Silver – Toxicology; Fresh water; Ions; masters theses
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Walli, C. A. (2019). Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles. (Masters Thesis). Western Washington University. Retrieved from https://cedar.wwu.edu/wwuet/877
Chicago Manual of Style (16th Edition):
Walli, Claire A. “Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles.” 2019. Masters Thesis, Western Washington University. Accessed April 12, 2021.
https://cedar.wwu.edu/wwuet/877.
MLA Handbook (7th Edition):
Walli, Claire A. “Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles.” 2019. Web. 12 Apr 2021.
Vancouver:
Walli CA. Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles. [Internet] [Masters thesis]. Western Washington University; 2019. [cited 2021 Apr 12].
Available from: https://cedar.wwu.edu/wwuet/877.
Council of Science Editors:
Walli CA. Impacts of Major Freshwater Ions on the Acute Toxicity and Chemical Behavior of Silver Nanoparticles. [Masters Thesis]. Western Washington University; 2019. Available from: https://cedar.wwu.edu/wwuet/877

University of Arizona
21.
Torres Urquidy, Oscar Hernando.
Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
.
Degree: 2011, University of Arizona
URL: http://hdl.handle.net/10150/202734
► In the current study, the antibacterial efficacy of zeolites containing silver or copper ions or a combination of these metals was assessed against several diverse…
(more)
▼ In the current study, the antibacterial efficacy of zeolites containing
silver or copper ions or a combination of these metals was assessed against several diverse copper resistant (CuR) and copper sensitive (CuS) strains of clinically relevant bacterial species. CuR Pseudomonas putida was significantly reduced in comparison to the unamended zeolite control. Unexpectedly, a CuS P. putida strain with no reported metal resistance appeared to be more resistant to the zeolite containing either Ag or Ag/Cu than the CuR strain. Contrary to expectations, after three and six hours of exposure, the CuS Escherichia coli displayed significantly more resistance to the Ag/Cu and Cu treatments than the reportedly CuR E. coli. All three reportedly CuR strains of Salmonella enterica exhibited resistance to Cu and Ag, as well as to the combination of the two metals after three and six hours of exposure. The reductions observed after 24 hours for all three CuR strains with Cu alone were still statistically significant compared to that of the CuS S. enterica strain. In addition, two of the CuR strains were more resistant to
silver after 24 hours of exposure, suggesting a shared resistance mechanism such a copper efflux pump that also removes
silver ions from the cell. Both the CuR and CuS strains of E. faecium were highly resistant to all of the treatments. In general, after comparison of all the resistances with all the treatments, E. faecium was the most resistant species, P. putida was the least resistant species, and the Salmonella strains were more resistant than E. coli in most cases.
Advisors/Committee Members: Gerba, Charles P (advisor), Chen, Qin (committeemember), Reynolds, Kelly A. (committeemember), Bright, Kelly R. (committeemember), Gerba, Charles P. (committeemember).
Subjects/Keywords: copper;
copper resistant;
silver;
zeolite;
Soil, Water & Environmental Science;
antibacterial;
bacteria
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Torres Urquidy, O. H. (2011). Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/202734
Chicago Manual of Style (16th Edition):
Torres Urquidy, Oscar Hernando. “Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
.” 2011. Doctoral Dissertation, University of Arizona. Accessed April 12, 2021.
http://hdl.handle.net/10150/202734.
MLA Handbook (7th Edition):
Torres Urquidy, Oscar Hernando. “Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
.” 2011. Web. 12 Apr 2021.
Vancouver:
Torres Urquidy OH. Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
. [Internet] [Doctoral dissertation]. University of Arizona; 2011. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10150/202734.
Council of Science Editors:
Torres Urquidy OH. Copper Resistant Bacteria Better Tolerate Commercially Available Antimicrobial Treatments Based in Silver and Silver-Copper Ions
. [Doctoral Dissertation]. University of Arizona; 2011. Available from: http://hdl.handle.net/10150/202734

University of Arizona
22.
Torrey, Jason Robert.
Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
.
Degree: 2014, University of Arizona
URL: http://hdl.handle.net/10150/338682
► Heavy metals have been known to possess antimicrobial properties against bacterial, fungal, and viral pathogens. Silver and copper in particular have been used for millennia…
(more)
▼ Heavy metals have been known to possess antimicrobial properties against bacterial, fungal, and viral pathogens.
Silver and copper in particular have been used for millennia to control bacterial and fungal contamination. Metal nanoparticles (aggregations of metal atoms 1-200 nm in size) have recently become the
subject of intensive study for their increased antimicrobial properties due to their increased surface area and localized release of metal ions when attached to pathogens. In the current studies, metal and metalhalide nanoparticles including
silver (Ag),
silver bromide (AgBr),
silver iodide (AgI), and copper iodide (CuI) nanoparticles were evaluated for their antibacterial efficacy against two common bacterial pathogens. All of the nanoparticles significantly reduced bacterial numbers within 24 hours of exposure and were more effective against the Gram-negative Pseudomonas aeruginosa than the Gram-positive Staphylococcus aureus. CuI nanoparticles were found to be highly effective, reducing both organisms by >4.43 log₁₀ within 15 minutes at 60 ppm Cu. CuI nanoparticles were selected for further evaluation against a range of microorganisms to determine their broad spectrum efficacy. CuI nanoparticles formulated with different stabilizers (sodium dodecyl sulfate, SDS; PVP) were tested against representative Gram-positive and Gram-negative bacteria, Mycobacteria, a fungus (Candida albicans), and a non-enveloped virus (poliovirus). Both nanoparticles caused significant reductions in most of the Gram-negative bacteria within five minutes of exposure (>5.09-log₁₀). The Gram-positive bacterial species were more sensitive to the CuI-SDS than the CuI-PVP nanoparticles. Likewise, C. albicans was also more sensitive to the CuI-SDS than the CuI-PVP nanoparticles. In contrast, the acid-fast Mycobacterium smegmatis was more resistant to the CuI-SDS than the CuI-PVP nanoparticle solutions (2.54-log₁₀ vs. 3.80-log₁₀ after 30 minutes). Poliovirus was more resistant than the other organisms tested except for Mycobacterium fortuitum. M. fortuitum was more resistant to both CuI nanoparticle solutions than any of the other organisms tested, requiring longer exposure times to achieve comparable reductions (~4.15 log₁₀ after 24 hours). As an example of a real world antimicrobial application, polymer surface coatings with embedded CuI nanoparticles were investigated to determine their potential use as self-disinfecting surfaces. Brushed polyurethane, spincoated acrylic, and powder coated polyester-epoxy coatings containing various concentrations of CuI nanoparticles were tested for antibacterial efficacy against P. aeruginosa and S. aureus. Polyester-epoxy powder coatings were superior to the other coatings in terms of uniformity and stability under moist conditions and displayed antimicrobial properties against both organisms (>4.92 log₁₀) after six hours at 0.25% Cu. Polyester-epoxy coatings were selected for more rigorous testing under adverse conditions. These surfaces were negatively impacted when tested under dry conditions with…
Advisors/Committee Members: Gerba, Charles P (advisor), Gerba, Charles P. (committeemember), Reynolds, Kelly A. (committeemember), Bright, Kelly R. (committeemember).
Subjects/Keywords: coatings;
copper;
halogens;
metal nanoparticles;
silver;
antimicrobial;
Soil, Water & Environmental Science
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Torrey, J. R. (2014). Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/338682
Chicago Manual of Style (16th Edition):
Torrey, Jason Robert. “Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
.” 2014. Doctoral Dissertation, University of Arizona. Accessed April 12, 2021.
http://hdl.handle.net/10150/338682.
MLA Handbook (7th Edition):
Torrey, Jason Robert. “Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
.” 2014. Web. 12 Apr 2021.
Vancouver:
Torrey JR. Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
. [Internet] [Doctoral dissertation]. University of Arizona; 2014. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10150/338682.
Council of Science Editors:
Torrey JR. Antimicrobial Properties Of Metal And Metal-Halide Nanoparticles And Their Potential Applications
. [Doctoral Dissertation]. University of Arizona; 2014. Available from: http://hdl.handle.net/10150/338682

Duke University
23.
Gwin, Carley Ann.
Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
Degree: 2016, Duke University
URL: http://hdl.handle.net/10161/13374
► The antimicrobial properties of silver have been taken advantage of by societies for thousands of years. Its use has come back in favor in…
(more)
▼ The antimicrobial properties of
silver have been taken advantage of by societies for thousands of years. Its use has come back in favor in the form of
silver nanoparticles, which are highly efficacious antimicrobial agents.
Silver nanoparticles are incorporated into a myriad of products specifically designed for clinical use, but also for general use by consumers.
Silver nanoparticles can be found in textiles such as clothing and stuffed toys, and in home appliances including washing machines and curling irons. A large number of products specifically marketed for use by children are also available to consumers, including pacifiers, sippy cups, and even breast milk storage bags. The hazards and toxicities associated with
silver nanoparticles are not well understood, however modes of toxicity have been reported for ionic
silver. It is assumed that the main mechanism of toxicity of
silver nanoparticles relates to the release of ionic
silver, however studies have indicated an additional nano-effect, likely due to nanoparticle size, differential coatings, and means of sustained dosing of ionic
silver. However we are sure that these
silver nanoparticles will accumulate in the waste stream, likely arriving during different stages of a product’s lifespan. A main sink of these nanoparticles travelling through both natural and engineered environments is wastewater treatment plants. As a society we rely on the biological removal of nutrients, which takes place primarily in the activated sludge of secondary treatment. Studies have already indicated possible, temporary decreases in removal efficiencies as well as changes in microbial communities, including losses of diversity, following exposure to
silver nanoparticles. Therefore, it is of paramount importance to examine the effects of both
silver nanoparticles and ionic
silver on the community and function of wastewater bacteria. Sequencing batch reactors were operated to mimic wastewater treatment. They were fed synthetic wastewater and after reaching acclimation, were dosed over time with varying concentrations of both ionic and nanosilver. Cell samples were collected periodically to assess the presence and identity of cultivable
silver resistant bacteria and to map the microbial community changes taking place under different treatments using Next Generation Sequencing. Isolates were tested for the presence of known
silver resistance (sil) genes as were activated sludge samples from a collection of domestic wastewater treatment plants, by designing TaqMan probe assays and performing quantitative PCR. The
silver resistant isolates were also used to test the growth implications, as well as sil gene expression changes, following treatment with ionic
silver and a variety of
silver nanoparticles with various coatings, all at multiple concentrations. This was accomplished by performing multiple batch experiments and then using the TaqMan assays and reverse transcription-quantitative PCR. Overall, microbial community changes were observed in the sequencing batch…
Advisors/Committee Members: Gunsch, Claudia K (advisor).
Subjects/Keywords: Environmental engineering;
Nanotechnology;
Microbiology;
activated sludge;
gene expression;
nanosilver;
silver resistance
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gwin, C. A. (2016). Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
(Thesis). Duke University. Retrieved from http://hdl.handle.net/10161/13374
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gwin, Carley Ann. “Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
” 2016. Thesis, Duke University. Accessed April 12, 2021.
http://hdl.handle.net/10161/13374.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gwin, Carley Ann. “Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
” 2016. Web. 12 Apr 2021.
Vancouver:
Gwin CA. Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
[Internet] [Thesis]. Duke University; 2016. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10161/13374.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gwin CA. Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
[Thesis]. Duke University; 2016. Available from: http://hdl.handle.net/10161/13374
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arkansas
24.
Walden, Connie Marie.
Investigating Fate of Silver Nanoparticles in Wastewater Biofilms.
Degree: PhD, 2017, University of Arkansas
URL: https://scholarworks.uark.edu/etd/2549
► As industrial advances make everyday life easier for human kind, the processes by which we need to maintain sanitary conditions for both water and…
(more)
▼ As industrial advances make everyday life easier for human kind, the processes by which we need to maintain sanitary conditions for both water and wastewater treatment will become increasingly complex. Innovations in food packaging and textile design incorporate engineered nanoparticles (ENPs) to increase antimicrobial properties of clothing, maintain product color, and keep food in packaging from spoilage. For most products, ENPs released will enter the sanitary sewer system, and ultimately wastewater treatment plants. Biofilms grow universally on surfaces where a protective layer of extracellular polymeric substances (EPS) shields attached cells from stressors. In wastewater treatment, complex biofilms are utilized as a biological process for nutrient removal. Along with manufacturing innovations, the technology to study wastewater processes also continues to advance. Understanding complex biological communities requires detailed expertise in metagenomics for identifying bacteria present in a unit process of interest. This dissertation seeks to address both issues with respect to biofilm processes. First, a review of ENPs and their interaction with wastewater microbial communities lays groundwork for understanding the current state of knowledge. Then, a comparison of multiple methods to identify wastewater biofilms will help to understand the proper application of metagenomics to study changing biofilms in the presence of ENPs. Finally, multiple bench scale reactors and a quartz crystal microbalance are used to quantify ENP accumulation in wastewater biofilm. These studies advance the field of biofilm research by aiding in understanding how new technologies impact the biological treatment processes applied in wastewater treatment, as well as improve on the metagenomic identification of biofilm communities in these environments.
Advisors/Committee Members: Wen Zhang, Lauren Greenlee, Franck Carbonero.
Subjects/Keywords: Biofilm; Biological Processes; Silver Nanoparticles; Wastewater Treatment; Civil Engineering; Environmental Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Walden, C. M. (2017). Investigating Fate of Silver Nanoparticles in Wastewater Biofilms. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/2549
Chicago Manual of Style (16th Edition):
Walden, Connie Marie. “Investigating Fate of Silver Nanoparticles in Wastewater Biofilms.” 2017. Doctoral Dissertation, University of Arkansas. Accessed April 12, 2021.
https://scholarworks.uark.edu/etd/2549.
MLA Handbook (7th Edition):
Walden, Connie Marie. “Investigating Fate of Silver Nanoparticles in Wastewater Biofilms.” 2017. Web. 12 Apr 2021.
Vancouver:
Walden CM. Investigating Fate of Silver Nanoparticles in Wastewater Biofilms. [Internet] [Doctoral dissertation]. University of Arkansas; 2017. [cited 2021 Apr 12].
Available from: https://scholarworks.uark.edu/etd/2549.
Council of Science Editors:
Walden CM. Investigating Fate of Silver Nanoparticles in Wastewater Biofilms. [Doctoral Dissertation]. University of Arkansas; 2017. Available from: https://scholarworks.uark.edu/etd/2549

The Ohio State University
25.
Liu, Jibin.
Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System.
Degree: MS, Civil Engineering, 2014, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952
► In this study, we investigated the heteroaggregation behavior of silver nanoparticles with clay minerals (montmorillonite and illite) in neutral pH solutions. Bare and Tween-coated silver…
(more)
▼ In this study, we investigated the heteroaggregation
behavior of
silver nanoparticles with clay minerals
(montmorillonite and illite) in neutral pH solutions. Bare and
Tween-coated
silver nanoparticles with a nominal diameter of 60.9 ±
0.5 nm were synthesized following established methods. Illite
(IMt-2) and montmorillonite (SWy-2) were purchased from the Clay
Mineral Society (Indiana) and pretreated to obtain monocationic
(Na-clay) and dicationic (Ca-clay) suspensions. Aggregation was
monitored as a function of electrolyte concentration in both homo-
and heteroaggregation scenarios by measuring the change in
hydrodynamic diameter as a function of time using dynamic light
scattering (DLS). Our results did not show significant differences
in the stability of binary component systems of bare
silver
nanoparticle and clays at pH 7 when compared to the single particle
systems of clay or
silver at the same pH. All six combinations of
bare
silver nanoparticles and clays in binary systems (i.e., f-f,
f-e, e-e, NP-f, NP-e, NP-NP) were barrier-controlled (i.e., high
electrolyte concentration is needed to overcome the energy barrier
to form aggregates). We attribute this to weakly charged or
negatively charged clay edges (e), negatively charged
silver
nanoparticles (AgNPs), as well as permanently negatively charged
basal plane surfaces (f) of the clays at pH 7. The results suggest
that the binary system of montmorillonite/illite and bare
silver
nanoparticles can be treated as a single component system of clays
under the experimental conditions studied, and the fate of
silver
nanoparticles in aqueous system may be controlled by their
heteroaggregation of clay minerals.However, under neutral
conditions, the stability of the binary system was greatly
increased when bare
silver nanoparticles were changed to
Tween-coated ones. The CCCs of the binary system contain
Tween-AgNPs are all above 100mM in either NaCl,
NaNO
3, or CaCl
2, and
in some systems such as Ca-montmorillonite with Tween-AgNPs, the
CCCs cannot even be determined in all the electrolyte solutions.
The adsorption of Tween 80 on the clay surface was proposed to
explain the changes among different clays and electrolytes. The
present results showed that coated
silver nanoparticles are more
mobile than uncoated ones, and their interactions with clay
minerals will be greatly affected by the existence of
polymer/surfactant in the medium.
Advisors/Committee Members: Lenhart, John (Advisor).
Subjects/Keywords: Environmental Engineering; Environmental Science; Nanoscience; Nanotechnology; nanoparticle; silver nanoparticles; clay minerals; heteroaggregation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, J. (2014). Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952
Chicago Manual of Style (16th Edition):
Liu, Jibin. “Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System.” 2014. Masters Thesis, The Ohio State University. Accessed April 12, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952.
MLA Handbook (7th Edition):
Liu, Jibin. “Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System.” 2014. Web. 12 Apr 2021.
Vancouver:
Liu J. Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System. [Internet] [Masters thesis]. The Ohio State University; 2014. [cited 2021 Apr 12].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952.
Council of Science Editors:
Liu J. Heteroaggregation of Silver Nanoparticles with Clay Minerals
in Aqueous System. [Masters Thesis]. The Ohio State University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952

University of Cincinnati
26.
Gitipour, Alireza.
Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment.
Degree: PhD, Engineering and Applied Science: Chemical
Engineering, 2016, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043053
► Nanotechnology has undergone a dramatic increase in popularity in the last decade due to the unique physicochemical characteristics of engineered nanomaterials (ENMs). Currently, approximately a…
(more)
▼ Nanotechnology has undergone a dramatic increase in
popularity in the last decade due to the unique physicochemical
characteristics of engineered nanomaterials (ENMs). Currently,
approximately a quarter of all nano-enabled consumer products
contain
silver nanoparticles (AgNPs). AgNPs are incorporated into a
wide range of consumer products (e. g., textiles, filters,
disinfectants, and washing machines) and have a wide range of
medical, industrial and scientific applications.The increased
application of AgNPs will inevitably lead to their release into
environmental systems. Since the presumed mechanisms governing the
fate, transport and toxicity of matter at the bulk scale may not
directly apply to nanomaterials, the potential
environmental
impacts associated with the release of AgNPs must be evaluated.
Furthermore, AgNPs are manufactured with a wide range of
physicochemical properties that impact their fate, transport and
toxicity in the environment.To this end, the impact of
silver
nanoparticles on the composting of municipal solid waste was
evaluated. Neither the presence of AgNPs nor the presence of Ag+
had a statistically significant influence on leachate, gas and
solid quality parameters, and therefore, on overall composting
performance. However, AgNPs and Ag+ both changed the overall
structure of the bacterial communities within the compost.
Nevertheless, the functional performance of the composting process
was not significantly affected due to the abundance and functional
redundancy of the bacterial communities within the compost samples.
While surface transformations of AgNPs to AgCl and Ag2S reduce
toxicity, complexation with organic matter may also play a role.
The results of this study further suggest that at relatively low
concentrations of AgNPs, these organically rich waste management
systems can withstand the presence of AgNPs.The microbial toxicity
of
silver nanoparticles stabilized with different capping agents
were evaluated under anaerobic conditions. The AgNPs investigated
were similar in size and shape but varied in surface charge. At
lower AgNPs concentrations, the anaerobic decomposition process was
not affected although the diversity of the microbial community was
impacted. Interestingly, at higher concentrations only the cationic
AgNPs demonstrated toxicity, while, the neutral and negatively
charged AgNPs did not exhibit toxicity. These findings indicate
that there are multiple mechanisms for nanoparticles toxicity. In
addition to the disposal studies, a study of a commonly-utilized
nanosilver solution using a simulated dental unit water delivery
system assessed the fate, mode of interaction and physicochemical
transformations of AgNPs under a realistic usage scenario. The
disinfection process led to the disappearance of the capping agents
and consequently transformations of AgNPs. In addition to further
understanding the transformations that occur in the process,
adsorption of the AgNPs onto the biofilms surface was demonstrated
which may assist in further understanding the toxicity…
Advisors/Committee Members: Thiel, Stephen (Committee Chair).
Subjects/Keywords: Chemical Engineering; Silver Nanoparticles; Physicochemical Transformations of AgNPs; Impact of Silver Nanomaterials on Waste
Treatment; Anaerobic Digestion; Impact of AgNPs on Waste Management Systems; Environmental Behavior of Silver Nanoparticles
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gitipour, A. (2016). Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043053
Chicago Manual of Style (16th Edition):
Gitipour, Alireza. “Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment.” 2016. Doctoral Dissertation, University of Cincinnati. Accessed April 12, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043053.
MLA Handbook (7th Edition):
Gitipour, Alireza. “Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment.” 2016. Web. 12 Apr 2021.
Vancouver:
Gitipour A. Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment. [Internet] [Doctoral dissertation]. University of Cincinnati; 2016. [cited 2021 Apr 12].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043053.
Council of Science Editors:
Gitipour A. Environmental Behavior of Silver Nanoparticles: Emissions
from Consumer Products and Toxicty in Waste Treatment. [Doctoral Dissertation]. University of Cincinnati; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470043053

Michigan State University
27.
Rivera Casanoba, Nathaly Macarena.
Three essays on environmental quality with polluting sectors : mining, electricity, and transportation.
Degree: 2018, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:19415
► Thesis Ph. D. Michigan State University. Agricultural, Food and Resource Economics 2018
"Mining, electricity, and transportation are currently among the top the economic sectors contributing…
(more)
▼ Thesis Ph. D. Michigan State University. Agricultural, Food and Resource Economics 2018
"Mining, electricity, and transportation are currently among the top the economic sectors contributing to environmental degradation around the world. This dissertation delves into recurring environmental problems associated to these polluting sectors through the application of several quasi-experimental methods and environmental valuation techniques. The first two essays elicit the value of proximity to environmental disamenities, namely, resource extraction sites and fossil fuel power stations. The third essay, evaluates the effectiveness of a command-and-control policy aimed at curbing pollution from automotive sources. Together, these three essays address relevant topics in non-market valuation and environmental regulation, and in settings that are pertinent to both developed and developing countries." – from abstract.
Online resource;
Advisors/Committee Members: Loveridge, Scott, Herriges, Joseph, Joshi, Satish, Lupi, Frank.
Subjects/Keywords: Environmental degradation – Economic aspects; Environmental economics; Mineral industries – Environmental aspects; Electricity – Environmental aspects; Transportation – Environmental aspects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rivera Casanoba, N. M. (2018). Three essays on environmental quality with polluting sectors : mining, electricity, and transportation. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:19415
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rivera Casanoba, Nathaly Macarena. “Three essays on environmental quality with polluting sectors : mining, electricity, and transportation.” 2018. Thesis, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:19415.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rivera Casanoba, Nathaly Macarena. “Three essays on environmental quality with polluting sectors : mining, electricity, and transportation.” 2018. Web. 12 Apr 2021.
Vancouver:
Rivera Casanoba NM. Three essays on environmental quality with polluting sectors : mining, electricity, and transportation. [Internet] [Thesis]. Michigan State University; 2018. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:19415.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rivera Casanoba NM. Three essays on environmental quality with polluting sectors : mining, electricity, and transportation. [Thesis]. Michigan State University; 2018. Available from: http://etd.lib.msu.edu/islandora/object/etd:19415
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University
28.
Huynh, Khang Vinh.
Plant uptake and metabolism of antimicrobials and antibiotics.
Degree: 2019, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:47737
► Thesis Ph. D. Michigan State University. Biosystems Engineering 2019
"Targeted and untargeted metabolomics using high resolution mass spectrometry and multivariate statistical analysis, coupled with 14C-labeled…
(more)
▼ Thesis Ph. D. Michigan State University. Biosystems Engineering 2019
"Targeted and untargeted metabolomics using high resolution mass spectrometry and multivariate statistical analysis, coupled with 14C-labeled chemicals studies were used to identify novel phytometabolites and quantify the fate of common antimicrobials in plant tissues. Triclocarban (TCC), an antimicrobial that is commonly found in personal care products, was metabolized by jalapeno pepper plants during long-term exposure (12 weeks), leading to the formation of several phase I transformation products (e.g. 2'-OH-TCC and 6-OH-TCC) and phase II glycosylated OH-TCC. Importantly, the concentrations of TCC metabolites were more than 20 times greater than the concentrations of TCC in the above-ground tissues of the pepper plants after 12 weeks. Approximately 95.6% of the TCC was present as metabolites in the fruits. For sulfonamides, upon exposure to the model plant Arabidopsis thaliana, sulfamethazine (SMT) and sulfamethoxazole (SMX) were also prone to extensive metabolism in plant tissues. Untargeted screening of extractable metabolites revealed that glycosylated conjugates were the most abundant metabolites, which accounted for 80 – 90% of the total metabolites in plant tissues. Other conjugates, such as pterin- and methylsalicyclate-, were present at lower concentrations. Phase I transformation products, such as hydroxyl-, acetyl-, desulfo, and desamino-, were identifed as minor metabolites in plant tissues. For tetracyclines, abiotic transformation and plant metabolism played the key roles in their fate during exposure to Arabidopsis thaliana. Plant metabolism of chlortetracycline (CTC) also led to the formation of glycosylated conjugates and the corresponding 4-epi isomers. More importantly, although CTC was solely added into the experimental reactors, other tetracycline antimicrobials such as tetracycline, 4-epi-tetracycline, demeclocycline, and 4-epi-demeclocycline were detected in the plant tissues. Preliminary studies using soil columns planted with A. thaliana plants showed that phytometabolism of sulfonamides was probably similar with that under hydroponic conditions, with glycosylated conjugates identified as the major phytometabolites. The majority of the uptaken parent sulfonamides and metabolites were found in the plant roots, with limited root-to-shoot translocation. In conclusion, this research indicates that untransformed antimicrobials only represent a small proportion of the total compounds taken up in plant tissues when transformed, conjugated, and sequestered phytometabolites are considered. Consequently, phytometabolism of antimicrobials in planted systems is a critical point for comprehensively addressing human exposure to contaminants of emerging concerns through food chains." – Pages ii-iii.
Description based on online resource;
Advisors/Committee Members: Reinhold, Dawn M, Cupples, Alison M, Mitchell, Jade D, Safferman, Steven I.
Subjects/Keywords: Phytoremediation; Anti-infective agents – Environmental aspects; Antibiotics – Environmental aspects; Environmental studies
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huynh, K. V. (2019). Plant uptake and metabolism of antimicrobials and antibiotics. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:47737
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Huynh, Khang Vinh. “Plant uptake and metabolism of antimicrobials and antibiotics.” 2019. Thesis, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:47737.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huynh, Khang Vinh. “Plant uptake and metabolism of antimicrobials and antibiotics.” 2019. Web. 12 Apr 2021.
Vancouver:
Huynh KV. Plant uptake and metabolism of antimicrobials and antibiotics. [Internet] [Thesis]. Michigan State University; 2019. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:47737.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huynh KV. Plant uptake and metabolism of antimicrobials and antibiotics. [Thesis]. Michigan State University; 2019. Available from: http://etd.lib.msu.edu/islandora/object/etd:47737
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong
29.
劉雪來.
The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity.
Degree: 2013, University of Hong Kong
URL: http://hdl.handle.net/10722/195985
► The advance of nanotechnology has made it possible that pure silver can be engineered into nano scale level with less than 100 nm in size.…
(more)
▼ The advance of nanotechnology has made it
possible that pure
silver can be engineered into nano scale level
with less than 100 nm in size. So far many studies have confirmed
anti-bacterial and anti-inflammatory efficacy of
silver
nanoparticles (AgNPs). In our previous study we have revealed that
AgNPs could promote wound healing through modulation of cytokines
in a burn wound model in mice. Nonetheless, the exact effects
mediated by AgNPs on various cell types in skin, including
keratinocytes and fibroblasts, during wound healing still remain
unknown. Therefore, in the present study we targeted a
full-thickness excisional wound model in mice to explore the action
and potential toxicity of AgNPs on keratinocytes and fibroblasts.
Immunohistochemistry staining and molecular assay were conducted
to explore AgNPs-induced re-epithelization and cell differentiation
in both in vivo and in vitro studies. We next targeted the healed
skin after AgNPs-mediated wound healing using tensile test to
compare their mechanical function. Meanwhile, immunohistochemistry
staining and quantitative assay were utilized to further
investigate and compare collagen deposition, and scanning electron
microscopy (SEM) was used to observe the morphology and
distribution of collagen fibrils in healed skin. Moreover, AgNPs of
different sizes and doses were studied to investigate the potential
toxicity, their influence on cell migration, and extracellular
matrix (ECM) production.
Key results:
1. AgNPs could
accelerate excisional wound healing in mouse skin when compared
with other formats of
silver.
2. AgNPs mediated differential
cellular response in skin cells. They promoted proliferation and
migration of keratinocytes in epidermal layer, through which the
re-epithelization process during wound healing was enhanced; while
proliferation of fibroblasts in dermal layer was inhibited and they
were driven into the differentiation of myofibroblasts, through
which wound contraction process was strengthened.
3. AgNPs
could suppress the proliferation of human keloid fibroblasts and
ECM production including collagen, fibronectin and heat shock
protein, which would suggest that AgNPs had anti-fibrosis effect.
4. The AgNPs could stimulate the proliferation of epidermal
progenitors and their differentiation into keratinocytes during
wound healing. This biological event further contributed to the
re-epithelization process.
5. AgNPs-mediated healed skin
possessed comparable mechanical function, collagen deposition and
fibril alignment to normal skin, which suggested AgNPs could
modulate collagen production during skin wound healing.
6. The
inhibitory effect on fibroblasts and cytotoxicity mediated by AgNPs
showed a dose-dependent and size-dependent manner.
In
conclusion, AgNPs not only contribute to healing of infected skin
wounds through antibacterial activity, but can also accelerate
wound healing through mediating differential cellular responses in
different skin cell types and modulate collagen production during
wound healing.…
Advisors/Committee Members: Tam, PKH (advisor), Wong, KKY (advisor).
Subjects/Keywords: Silver
- Therapeutic use; Silver
- Health aspects;
Nanoparticles - Health aspects;
Nanoparticles - Therapeutic use
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
劉雪來. (2013). The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/195985
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
劉雪來. “The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity.” 2013. Thesis, University of Hong Kong. Accessed April 12, 2021.
http://hdl.handle.net/10722/195985.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
劉雪來. “The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity.” 2013. Web. 12 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
劉雪來. The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity. [Internet] [Thesis]. University of Hong Kong; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10722/195985.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
劉雪來. The role of silver
nanoparticles on skin wound healing, tissue remodeling and their
potential cytotoxicity. [Thesis]. University of Hong Kong; 2013. Available from: http://hdl.handle.net/10722/195985
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology
30.
Du, Dijia ENVR.
Environmental policy in China : historical perspectives and current implementation.
Degree: 2017, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-104828
;
https://doi.org/10.14711/thesis-991012529567503412
;
http://repository.ust.hk/ir/bitstream/1783.1-104828/1/th_redirect.html
► Challenged by the emerging environmental activism and China’s increased involvement in international dialogue on environmental protection, scholars have called for further studies on the classic…
(more)
▼ Challenged by the emerging environmental activism and China’s increased involvement in international dialogue on environmental protection, scholars have called for further studies on the classic Fragmented Authoritarianism (FA) model with regards to its explanatory power on the policy process in China. This study seeks to contribute to this ongoing research by examining cases from the environmental sector. The overall aim is to provide an updated explanation on the mechanism of policy change in China through integration of the ideas of Fragmented Authoritarianism, Policy Change Windows, and Policy Entrepreneurs into the Advocacy Collation Framework (ACF). A qualitative approach was employed to conduct this study combining extensive literature collection and review, with participant observations and in-depth interviews in the field. Cases analysed include the beginning stage of environmental protection in China in the early 1970s, and the long-term evolution of Lake Dian protection policies from 1970s to recent years. Findings from the study support: (1) the application of ACF to explain policy changes in the Chinese context; and (2) the necessity to integrate FA into ACF to reveal the structural factor embedded in the relationship between the coalitions at the national and local policy subsystems.
Subjects/Keywords: Environmental policy
; China
; Political aspects
; Economic aspects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Du, D. E. (2017). Environmental policy in China : historical perspectives and current implementation. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-104828 ; https://doi.org/10.14711/thesis-991012529567503412 ; http://repository.ust.hk/ir/bitstream/1783.1-104828/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Du, Dijia ENVR. “Environmental policy in China : historical perspectives and current implementation.” 2017. Thesis, Hong Kong University of Science and Technology. Accessed April 12, 2021.
http://repository.ust.hk/ir/Record/1783.1-104828 ; https://doi.org/10.14711/thesis-991012529567503412 ; http://repository.ust.hk/ir/bitstream/1783.1-104828/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Du, Dijia ENVR. “Environmental policy in China : historical perspectives and current implementation.” 2017. Web. 12 Apr 2021.
Vancouver:
Du DE. Environmental policy in China : historical perspectives and current implementation. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2017. [cited 2021 Apr 12].
Available from: http://repository.ust.hk/ir/Record/1783.1-104828 ; https://doi.org/10.14711/thesis-991012529567503412 ; http://repository.ust.hk/ir/bitstream/1783.1-104828/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Du DE. Environmental policy in China : historical perspectives and current implementation. [Thesis]. Hong Kong University of Science and Technology; 2017. Available from: http://repository.ust.hk/ir/Record/1783.1-104828 ; https://doi.org/10.14711/thesis-991012529567503412 ; http://repository.ust.hk/ir/bitstream/1783.1-104828/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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