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Université de Neuchâtel
1.
Jeannottat, Simon.
Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions.
Degree: 2012, Université de Neuchâtel
URL: http://doc.rero.ch/record/31444
► Compound-specific isotope analysis (CSIA) has proven to be an effective tool to assess in-situ biodegradation of volatile organic compounds (VOCs) in groundwater and to distinguish…
(more)
▼ Compound-specific isotope analysis (CSIA) has proven
to be an effective tool to assess in-situ
biodegradation of
volatile organic compounds (VOCs) in groundwater and to distinguish
between different contaminant sources. There is an increasing
interest to apply the CSIA method also in unsaturated zone studies.
However, under variably saturated conditions, physical processes
such as phase partitioning and diffusion might influence isotope
ratios as well. The main aim of this study was to quantify isotope
fractionation associated with physical processes relevant for the
unsaturated zone and to explore how isotope ratios evolve if
different processes interact. The study focussed on chlorinated
hydrocarbons, which are among the most common contaminants detected
in the subsurface. In addition to carbon, the behaviour of chlorine
isotopes was also investigated. Since the mass difference between
the stable chlorine isotopes is two, larger isotope effects are
expected to occur than for carbon, especially for diffusion. In
order to make chlorine isotope analysis feasible, some analytical
method development was required as well. A new
analytical method for chlorine isotope ratio analyses based on gas
chromatography quadrupole mass-spectrometry (GC-qMS) measurements
was evaluated by comparing it with established IRMS based methods.
The study highlighted the need to perform a two-point calibration
and to bracket samples with standards of the same concentrations.
Using this approach, a precision of 1σ ≈0.2-0.5% (n=10) was reached
for TCE measurements with an Agilent GC-qMS. Additionally, the
relationship between isotope and isotopologue fractionation during
vaporization and diffusion was explored theoretically. While
fractionation takes place among isotopologues it is usually more
convenient to express results as isotope ratios. It was demonstrate
that during vaporization and diffusion chlorine isotope and
isotopologue fractionation is proportional in good approximation
even when several isotopologues with multiple heavy isotopes are
present. As a consequence, isotope ratios can be determined even if
only some isotopologues are quantified and isotope fractionation
factors can be derived from either isotope or isotopologue ratios.
In a next step, isotope fractionation during processes
relevant for the release of compounds from NAPL (vaporization) or
groundwater (air-water partitioning) was quantified in isolation
for the trichloroethylene (TCE) using various laboratory
experiments. During NAPL-vapor equilibration, carbon and chlorine
isotope ratios evolved in opposite directions although both
elements are present in the same bond, with a normal isotope effect
for chlorine (ε
Cl = -0.39±0.03‰) and an
inverse effect for carbon (ε
C =
+0.75±0.04‰). During air-water partitioning, no significant
chlorine isotope fractionation occurred, while an inverse carbon
isotope effect (ε
C = +0.38±0.04‰) was
observed, that was however weaker than for vaporization.
Then, the combined effect of release of…
Advisors/Committee Members: Daniel (Dir.).
Subjects/Keywords: biodegradation
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Chicago ·
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APA (6th Edition):
Jeannottat, S. (2012). Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions. (Thesis). Université de Neuchâtel. Retrieved from http://doc.rero.ch/record/31444
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):
Jeannottat, Simon. “Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions.” 2012. Thesis, Université de Neuchâtel. Accessed March 02, 2021.
http://doc.rero.ch/record/31444.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jeannottat, Simon. “Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions.” 2012. Web. 02 Mar 2021.
Vancouver:
Jeannottat S. Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions. [Internet] [Thesis]. Université de Neuchâtel; 2012. [cited 2021 Mar 02].
Available from: http://doc.rero.ch/record/31444.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jeannottat S. Isotope fractionation of volatile organic compounds in
porous media under variably saturated conditions. [Thesis]. Université de Neuchâtel; 2012. Available from: http://doc.rero.ch/record/31444
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rutgers University
2.
Hassinger, Denise Ann, 1985-.
Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi.
Degree: MS, Biology, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/57077/
► Plastic pollution is a recognized global threat that must be resolved in order to preserve and conserve natural ecosystems. Fungi are prime candidates for being…
(more)
▼ Plastic pollution is a recognized global threat that must be resolved in order to preserve and conserve natural ecosystems. Fungi are prime candidates for being one of the many solutions to reducing plastic waste since they are primary decomposers. In particular, white-rot fungi possess ligninolytic enzymes, which break down complex lignin molecules. The present study demonstrates that selected white-rot fungi are able to biodegrade certain single-use plastics. The selected fungi are the following: Pleurotus ostreatus, P. ostreatus columbinus, Lentinula edodes, Ganoderma lucidum, and Trametes versicolor. The selected single-use plastics for this study are the following: high-density polyethylene, low-density polyethylene, polypropylene, polystyrene, and polyethylene terephthalate.
Advisors/Committee Members: Dighton, John (chair).
Subjects/Keywords: Biodegradation
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APA (6th Edition):
Hassinger, Denise Ann, 1. (2018). Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/57077/
Chicago Manual of Style (16th Edition):
Hassinger, Denise Ann, 1985-. “Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi.” 2018. Masters Thesis, Rutgers University. Accessed March 02, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/57077/.
MLA Handbook (7th Edition):
Hassinger, Denise Ann, 1985-. “Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi.” 2018. Web. 02 Mar 2021.
Vancouver:
Hassinger, Denise Ann 1. Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi. [Internet] [Masters thesis]. Rutgers University; 2018. [cited 2021 Mar 02].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57077/.
Council of Science Editors:
Hassinger, Denise Ann 1. Utilizing natural components to combat anthropogenic effects: biodegradation of single-use plastics by white-rot fungi. [Masters Thesis]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57077/

Oregon State University
3.
Eaton, Hillary L.
Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes.
Degree: PhD, Public Health, 2011, Oregon State University
URL: http://hdl.handle.net/1957/21080
► Cyclic nitramines released into all environmental compartments through anthropogenic activities are toxic and possibly carcinogenic and mutagenic. Soils on military ranges, located throughout the world…
(more)
▼ Cyclic nitramines released into all environmental compartments through anthropogenic activities are toxic and possibly carcinogenic and mutagenic. Soils on military ranges, located throughout the world in various climatic regions and close to human activities, are especially susceptible to cyclic nitramine contamination. The properties of soils on military ranges will directly affect the cyclic nitramine contamination and
biodegradation; however, studies in this area are limited. Previous related research was mainly focused on monitoring the temporal and spatial changes in nitrate explosive concentrations and various in situ and ex situ remediation techniques. Anaerobic
biodegradation of cyclic nitramines in soils is scarce, but appears to be a more efficient means of bioremediation than aerobic techniques; however, most published research has not been applied in situ as there are numerous hindrances to applications in the field. The present research therefore aims to study the feasibility of
ruminal bioremediation as an inexpensive, ecologically conscious, and viable means to remediate soils on military ranges contaminated with cyclic nitramines by (1) determining if RDX degradation in whole ovine rumen fluid occurs and isolating and identifying organisms capable of degradation through enrichments; (2) evaluating the ability of 24 commonly isolated bacteria from the rumen to degrade RDX and determining the metabolite pathway by capable isolates, as well as by consortia in whole rumen fluid; and (3) exploring HMX degradation in whole ovine rumen fluid and identifying the HMX-degradation pathway in whole rumen fluid and by capable isolates tested.
Bioremediation is of great interest in the detoxification of soil contaminated with residues from explosives such as hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). Although there are numerous forms of in situ and ex situ bioremediation, ruminants would provide the option of an in situ bioreactor that could be transported to the site of contamination. Bovine rumen fluid has been previously shown to transform 2,4,6- trinitrotoluene (TNT), a similar compound, in 4 h. In this study, RDX incubated in whole ovine rumen fluid was nearly eliminated within 4 h. Whole ovine rumen fluid was then inoculated into five different types of media to select for archaeal and bacterial organisms capable of RDX biotransformation. Cultures containing 30 μg mL⁻¹ RDX were transferred each time the RDX concentration decreased to 5 μg mL⁻¹
or less. Time point samples were analyzed for RDX biotransformation by HPLC. The two fastest transforming enrichments were in methanogenic and low nitrogen basal media. After 21 days, DNA was extracted from all enrichments able to partially or
completely transform RDX in 7 days or less. To understand microbial diversity, 16S rRNA-gene-targeted denaturing gradient gel electrophoresis (DGGE) finger- printing was conducted. Cloning and sequencing of partial 16S rRNA fragments were performed on both low nitrogen basal and methanogenic media enrichments.…
Advisors/Committee Members: Craig, Albert M. (advisor), Bottomley, Peter (committee member).
Subjects/Keywords: biodegradation; Nitroamines – Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Eaton, H. L. (2011). Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/21080
Chicago Manual of Style (16th Edition):
Eaton, Hillary L. “Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes.” 2011. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/21080.
MLA Handbook (7th Edition):
Eaton, Hillary L. “Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes.” 2011. Web. 02 Mar 2021.
Vancouver:
Eaton HL. Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes. [Internet] [Doctoral dissertation]. Oregon State University; 2011. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/21080.
Council of Science Editors:
Eaton HL. Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes. [Doctoral Dissertation]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/21080

University of Oklahoma
4.
Morris, Brandon E. L.
ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES.
Degree: PhD, 2011, University of Oklahoma
URL: http://hdl.handle.net/11244/319116
► In conclusion, this dissertation provides enrichment factors for n-alkane biodegradation and reveals characteristic patterns of compound specific isotope enrichment for mineralized end products during methanogenic…
(more)
▼ In conclusion, this dissertation provides enrichment factors for n-alkane
biodegradation and reveals characteristic patterns of compound specific isotope enrichment for mineralized end products during methanogenic hydrocarbon degradation. Both can be used to monitor in situ
biodegradation on n-alkanes without previous knowledge of bacterial species or
biodegradation processes at a site of interest. Furthermore, information regarding the proteins expressed during anaerobic alkane mineralization by a model SRB provided new insight into the physiology of this process.
Advisors/Committee Members: Suflita, Joseph M (advisor).
Subjects/Keywords: Biodegradation; Hydrocarbons – Biodegradation; Bioremediation
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APA (6th Edition):
Morris, B. E. L. (2011). ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319116
Chicago Manual of Style (16th Edition):
Morris, Brandon E L. “ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES.” 2011. Doctoral Dissertation, University of Oklahoma. Accessed March 02, 2021.
http://hdl.handle.net/11244/319116.
MLA Handbook (7th Edition):
Morris, Brandon E L. “ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES.” 2011. Web. 02 Mar 2021.
Vancouver:
Morris BEL. ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES. [Internet] [Doctoral dissertation]. University of Oklahoma; 2011. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11244/319116.
Council of Science Editors:
Morris BEL. ISOTOPIC FRACTIONATION AND ANAEROBIC PHYSIOLOGY OF n-ALKANE DEGRADATION BY BACTERIAL ISOLATES AND MIXED COMMUNITIES. [Doctoral Dissertation]. University of Oklahoma; 2011. Available from: http://hdl.handle.net/11244/319116

Rochester Institute of Technology
5.
Thompson, Rowan.
Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater.
Degree: MS, Thomas H. Gosnell School of Life Sciences (COS), 2017, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9528
► Groundwater contamination is an extremely important topic in environmental science. Ex-situ removal of contaminants is costly and largely ineffective on contaminants that have high…
(more)
▼ Groundwater contamination is an extremely important topic in environmental science. Ex-situ removal of contaminants is costly and largely ineffective on contaminants that have high vapor pressures and readily mix with water. Bioremediation or bio-augmentation are attractive alternative ways to remediate a site, as they may require less work and be more cost-effective.
Groundwater samples from a superfund site contaminated with chlorinated compounds and other volatile organic compounds. Samples were enriched to select for organisms capable of degrading cyclic ethers, specifically tetrahydrofuran and 1,4-dioxane. The isolates were tested for their degradation capacity and to determine if they were impacted by the presence of aliphatic chlorinated compounds.
Consortia of organisms were isolated and grow readily on rich media as well as in high concentrations of tetrahydrofuran and 1,4-dioxane (616 mM THF, 586 mM 1,4-dioxane). They were also shown to be able to grow readily in the presence of, and directly on, tetrachloroethylene (0.2 mM).
Previous research done at the source of the organisms has shown the presence of functional and phylogenetic genes that may co-metabolize tetrahydrofuran and 1,4-dioxane. This research has confirmed the previous hypothesis that degradation was occurring by microorganisms on site. 16sRNA analysis was completed on the isolates, and the majority of organisms have not been previously seen in degradation of these compounds. Commonly known degraders were not found in the samples, suggesting other degradation pathways are being used.
Advisors/Committee Members: Jeffrey Lodge.
Subjects/Keywords: Biodegradation; Remediation
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APA ·
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MLA ·
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CSE |
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APA (6th Edition):
Thompson, R. (2017). Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9528
Chicago Manual of Style (16th Edition):
Thompson, Rowan. “Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater.” 2017. Masters Thesis, Rochester Institute of Technology. Accessed March 02, 2021.
https://scholarworks.rit.edu/theses/9528.
MLA Handbook (7th Edition):
Thompson, Rowan. “Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater.” 2017. Web. 02 Mar 2021.
Vancouver:
Thompson R. Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater. [Internet] [Masters thesis]. Rochester Institute of Technology; 2017. [cited 2021 Mar 02].
Available from: https://scholarworks.rit.edu/theses/9528.
Council of Science Editors:
Thompson R. Degradation of cyclic ethers by microorganisms isolated from contaminated groundwater. [Masters Thesis]. Rochester Institute of Technology; 2017. Available from: https://scholarworks.rit.edu/theses/9528

Oregon State University
6.
Walz, Anita.
Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent.
Degree: MS, Bioresource Engineering, 1993, Oregon State University
URL: http://hdl.handle.net/1957/35898
► Dried cattail and bulrush plant pieces in mesh bags were incubated in the constructed wetland treating Pope & Talbot pulp mill effluent. Two ponds planted…
(more)
▼ Dried cattail and bulrush plant pieces in mesh bags were incubated in the
constructed wetland treating Pope & Talbot pulp mill effluent. Two ponds
planted with each species and two depth ranges in each pond were chosen, to
determine decomposition rates. Bags were withdrawn and analyzed at five time
points for the cattail and three for the bulrush. Also a laboratory study was
conducted, where ground cattail and bulrush material was incubated aerobically
and anaerobically. Both species and control were sampled at five time points.
The remaining dry mass and the contents of hemicellulose, cellulose, lignin, and
silica was examined. Decomposition rates were determined by fitting the data to
the single exponential model with the intercept fixed in 1 (100%). An asymptotic
model was used to obtain better fit. The sum of squared errors (SSE) was used
as a measure of fit.
In the field study the ANOVA revealed no change in decomposition with
depth. Neither was there a difference between cattail and bulrush ponds. During
the first two days only the cell compounds are drastically reduced. Cellulose and
hemicellulose start to decline later. Lignin increased slightly during the first half
of the experiment. Decay rates from the single exponential model with the
intercept fixed were higher than the ones listed for wetlands by Webster &
Benfield (1986). The asymptotic model indicates, that there is a fraction, which
does not decompose significantly during the time frame of the experiment. It
predicts 36% cattail and 53% bulrush material to be left after one year of
decomposition.
All samples in the laboratory incubation showed strong leaching during
the first day (26.5% for cattail, 23% for bulrush). After this the t-test (95%
confidence) showed a significant decay coefficient only for the aerobic cattail
samples the model with the best fit. These same samples had an increased cell
component, and a very small particle size at the last sampling time (120 days).
Neither bulrush nor the anaerobic cattail incubations showed the same effect.
Cattail and bulrush plants in the field were labeled to observe the
senescence. Their height and in the case of cattail the amount of green and dry
leaves was recorded monthly. Plants were harvested once a month until
February, and the fiber composition was measured. Cattail was completely dry in
January, while bulrush still showed green spots in February. Cattail entered the
aquatic system mainly by dropping pieces of leaf tips, less by breaking off and
losing the outside leaves. In February the average height of cattail plants was
64.7% of the maximum average height in August. Bulrush plants shortened to
84.1% of the maximum average height from September. Most of the bulrush
plants died through nutria, a rodent, which is chopping off the plants. Less
material was lost by dropping small pieces off the plant tips.
Advisors/Committee Members: Moore, James A. (advisor), Hashimoto, Andrew G. (committee member).
Subjects/Keywords: Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Walz, A. (1993). Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/35898
Chicago Manual of Style (16th Edition):
Walz, Anita. “Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent.” 1993. Masters Thesis, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/35898.
MLA Handbook (7th Edition):
Walz, Anita. “Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent.” 1993. Web. 02 Mar 2021.
Vancouver:
Walz A. Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/35898.
Council of Science Editors:
Walz A. Decomposition of cattail and bulrush plant parts in a constructed wetland treating pulp mill effluent. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/35898

Université de Neuchâtel
7.
Savoy, Ludovic.
Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems.
Degree: 2007, Université de Neuchâtel
URL: http://doc.rero.ch/record/8819
► De nombreuses études concernant les aquifères poreux ont démontré que l’atténuation naturelle d’un contaminant, essentiellement attribuée à la biodégradation, peux considérablement réduire la masse de…
(more)
▼ De nombreuses études concernant les aquifères poreux
ont démontré que l’atténuation naturelle d’un contaminant,
essentiellement attribuée à la biodégradation, peux
considérablement réduire la masse de ce contaminant à l’intérieur
de l’aquifère. Les processus d’atténuation naturelle d’un
contaminant dans les aquifères karstiques sont par contre beaucoup
moins connus. Ce projet a eu pour but d’étudier le potentiel
d’atténuation par biodégradation de composés dissouts dans la zone
non saturée des systèmes karstiques. La quantité de masse dégradée
d’un contaminant dissout dans l’eau et traversant la zone non
saturée dépend fortement du temps de transit de cette substance
dissoute ainsi que de l'activité biologique au sein de cette même
zone. Ces deux facteurs (temps de transit, activité biologique) ont
été étudiés au sein de plusieurs sites karstiques présentant des
caractéristiques hydrauliques différentes (zone saturée et zone non
saturée de plus de 50 mètres, conduits directement connecté à
l’epikarst, eau de percolation en provenance des volumes peu
perméables non saturés). Le temps de transit de substances
dissoutes dans le système karstique a été étudié en utilisant une
approche basée sur les traceurs naturels. Cette approche présente
l’avantage que la réaction hydraulique du système à un nombre élevé
de précipitations de différentes intensités peut être étudiée
relativement facilement. Des traceurs naturellement produits dans
le sol et ensuite graduellement dégradé selon différentes échelles
de temps dans la zone non saturée on été étudiés. Ces traceurs
apportent ainsi des informations sur le temps de résidence de l’eau
et des substances dissoutes dans la zone non saturée. Ces traceurs
incluaient, le radon (222Rn), le carbone organique total (COT)
ainsi que le gaz carbonique dissout (CO2). Le 222Rn est produit par
de la désintégration du 226Radium, naturellement présent dans le
sol, et décroit selon une demi-vie de 3.8 jours. Le COT provient de
la matière organique du sol et décroit par biodégradation avec une
échelle de temps plus longue mais nettement moins bien définie et
connue que pour le 222Rn. Finalement, le CO2 est également produit
dans le sol mais par la respiration des plantes et organismes. Il
est partiellement consumé par la dissolution des carbonates dans
l’epikarst et la zone non saturée. En outre, la production de CO2
dans le sol montre une grande variation annuelle et par conséquent,
l'eau qui s’infiltre en été ou en hiver présente une concentration
différente en CO2 par rapport à l'eau stockée dans la zone non
saturée depuis une longue période. Ces traceurs ont été mesuré en
continu à la grotte de Milandre, avec une zone non saturée de plus
de 50 mètres, dans le but de pouvoir évaluer la réaction
hydraulique du système karstique suite à des précipitations de
différentes intensités. Aux sites de Vers-Chez-le-Brandt et
Grand-Bochat, ces traceurs ont été mesurés durant des
précipitations naturelles ou artificielles afin d’évaluer la
composition de l’eau du sol. Suite à des précipitations modérées,…
Advisors/Committee Members: Daniel (Dir.).
Subjects/Keywords: Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Savoy, L. (2007). Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems. (Thesis). Université de Neuchâtel. Retrieved from http://doc.rero.ch/record/8819
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):
Savoy, Ludovic. “Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems.” 2007. Thesis, Université de Neuchâtel. Accessed March 02, 2021.
http://doc.rero.ch/record/8819.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Savoy, Ludovic. “Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems.” 2007. Web. 02 Mar 2021.
Vancouver:
Savoy L. Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems. [Internet] [Thesis]. Université de Neuchâtel; 2007. [cited 2021 Mar 02].
Available from: http://doc.rero.ch/record/8819.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Savoy L. Use of natural and artificial reactive tracers to
investigate the transfer of solutes in karst systems. [Thesis]. Université de Neuchâtel; 2007. Available from: http://doc.rero.ch/record/8819
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Ryerson University
8.
Dahahda, Samer.
Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production.
Degree: 2017, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A7118
► The rapid depletion of natural resources and the environmental concerns associated with the use of fossil fuels as the main source of global energy is…
(more)
▼ The rapid depletion of natural resources and the environmental concerns associated with the use of fossil fuels as the main source of global energy is leading to an increased interest in alternative and renewable energy sources. Lignocellulosic biomass is the most abundant source of organic materials that can be utilized as an energy source. Anaerobic digestion has been proven to be an effective technology for converting organic material into energy products such as biogas. However, the nature of lignocellulosic materials hinders the ability of microorganisms in an anaerobic digestion process to degrade and convert organic material to biogas. Therefore, a pretreatment step is necessary to improve the degradability of lignocellulosic materials and achieve higher biogas yield. Several pretreatment methods have been studied over the past few years including physical, thermal, chemical and biological pretreatment. This paper reviews biological and thermal pretreatment as two main promising methods used to improve biogas production from lignocelluloses. A greater focus is given on enzymatic pretreatment which is one of the promising yet under-researched biological pretreatment method. The paper addresses challenges in degrading lignocellulosic materials and the current status of research to improve biogas yield from lignocelluloses through biological and thermal pretreatment.
Subjects/Keywords: Biogas; Biodegradation; Renewable energy sources; Lignocellulose – Biodegradation
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APA (6th Edition):
Dahahda, S. (2017). Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A7118
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):
Dahahda, Samer. “Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production.” 2017. Thesis, Ryerson University. Accessed March 02, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A7118.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dahahda, Samer. “Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production.” 2017. Web. 02 Mar 2021.
Vancouver:
Dahahda S. Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production. [Internet] [Thesis]. Ryerson University; 2017. [cited 2021 Mar 02].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A7118.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dahahda S. Biological And Thermal Pretreatment Of Lignocellulosic Materials For Enhanced Biogas Production. [Thesis]. Ryerson University; 2017. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A7118
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Ryerson University
9.
Amin, Zeid.
Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production.
Degree: 2017, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A7117
► Lignocellulosic substrate is a resource that contains a locked energy reserve that is normally lost during anaerobic digestion. Lignocellulosic substrate is one of the most…
(more)
▼ Lignocellulosic substrate is a resource that contains a locked energy reserve that is normally lost during anaerobic digestion. Lignocellulosic substrate is one of the most abundant sources of organic matter available and yet its energy recovery has much room for improvement. Lignocellulosic substrate has cellular properties that are deemed extremely difficult to degrade due to complexity which is why this energy reserve is never unlocked during anaerobic digestion. There are several successful pretreatment methods that are used to degrade this lignocellulosic substrate and unlock this energy reserve. This paper will focus on the methods that include mechanical, irradiation, chemical and combined pretreatment processes. Analysis is conducted on all the studies that are obtained to compare the successes of the different types of pretreatment processes used. Each of the different listed pretreatment processes have different energy requirements, treatment times, and solvent requirement and are acting to enhancing methane production. The improvement in methane production varies from process to process and study to study creating a need to compile all of this valuable data into this research report. This will help future researchers in navigating the available studies of pretreatment of lignocellulosic substrate for improving methane production.
Subjects/Keywords: Lignocellulose – Biotechnology; Biodegradation; Methane; Lignocellulose – Biodegradation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Amin, Z. (2017). Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A7117
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):
Amin, Zeid. “Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production.” 2017. Thesis, Ryerson University. Accessed March 02, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A7117.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Amin, Zeid. “Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production.” 2017. Web. 02 Mar 2021.
Vancouver:
Amin Z. Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production. [Internet] [Thesis]. Ryerson University; 2017. [cited 2021 Mar 02].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A7117.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Amin Z. Evaluation Of Mechanical, Irradiation And Chemical Pretreatment Lignocelulosic Substrate For Enhanced Methane Production. [Thesis]. Ryerson University; 2017. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A7117
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Oklahoma
10.
Beasley, Keisha Kohler.
Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation.
Degree: PhD, 2012, University of Oklahoma
URL: http://hdl.handle.net/11244/318823
The results in these studies provide information that advances our understanding of anaerobic hydrocarbon biodegradation. Ultimately, this information can be used to address questions about mechanism preferences, substrate preferences, biodegradation rates, and energy requirements for conversions in systems worldwide.
Advisors/Committee Members: Nanny, Mark A (advisor).
Subjects/Keywords: Hydrocarbons – Biodegradation; Bioremediation; Biodegradation; Anaerobic bacteria
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Beasley, K. K. (2012). Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/318823
Chicago Manual of Style (16th Edition):
Beasley, Keisha Kohler. “Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed March 02, 2021.
http://hdl.handle.net/11244/318823.
MLA Handbook (7th Edition):
Beasley, Keisha Kohler. “Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation.” 2012. Web. 02 Mar 2021.
Vancouver:
Beasley KK. Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11244/318823.
Council of Science Editors:
Beasley KK. Modeling Rates and Energetics of Anaerobic Hydrocarbon Biodegradation. [Doctoral Dissertation]. University of Oklahoma; 2012. Available from: http://hdl.handle.net/11244/318823

Oregon State University
11.
Goby, Jeffrey Dean.
Experimental approach for the determination of lignin modification by manganese peroxidase.
Degree: MS, Chemical Engineering, 2010, Oregon State University
URL: http://hdl.handle.net/1957/13827
► Degradation of lignin to simpler compounds is desirable for removing residual lignin during paper manufacture and accessing biomass carbohydrates for biofuel production, among other purposes.…
(more)
▼ Degradation of lignin to simpler compounds is desirable for removing residual lignin during paper manufacture and accessing biomass carbohydrates for biofuel production, among other purposes. Lignin transformation using enzymes found in white rot fungi, some of nature's most efficient lignin-degrading organisms, offers a more environmentally benign, selective, and possibly less costly alternative to purely thermochemical means. One type of enzyme used by white rot fungi to degrade lignin in vivo is manganese peroxidase (MnP), which has been successfully purified from the native fungi and produced recombinantly in high yields. To facilitate investigation of lignin transformation by recombinant manganese peroxidase (rMnP), reaction systems were developed and assays refined to detect lignin transformation products. The systems were tested with different solid lignin substrates and sets of components that affect the ability of rMnP to degrade the solid substrate. In several experiments, the dye methylene blue was used as an rMnP substrate and lignin surrogate to rapidly determine the oxidative capacity of rMnP systems containing different short chain organic acids (malonate or oxalate), fatty acids (oleic, linoleic, or linolenic acids), and iron reducing agents (3,4-dihydroxyphenyl acetic acid, vanillic acid, wheat straw extracts). The dye was also used to determine the effect of a Fenton pretreatment on the ability of a subsequent rMnP treatment to degrade a substrate.
Two solid wheat straw lignin substrates were used in the reaction system tests: acid insoluble lignin (AIL) and lignin remaining after dilute acid pretreatment, and cellulase saccharification and desorption (mild acid lignin, MAL). Degradation of AIL was undetected in an rMnP system containing malonate and hydrogen peroxide at several concentrations, but a colored high molecular weight (>10 kDa) Mn(III)-malonate complex was generated in the system with 0.1 mM hydrogen peroxide. Degradation of MAL or improved glucose yield due to synergy between
cellulases and rMnP were also not definitively detected in a system containing rMnP, cellulases, and linoleic acid. On the other hand, rMnP-induced cellulase inhibition did appear to occur.
The rMnP systems containing an emulsified polyunsaturated fatty acid (linoleic acid or linolenic acid) were more effective at degrading methylene blue dye than rMnP systems containing malonate or oxalate in place of the fatty acid. This was likely due to formation of reactive lipid peroxyl radicals which oxidized the dye by hydrogen or electron abstraction. Addition of malonate, oxalate, or iron reducing agent to the rMnP system with emulsified linoleic acid resulted in variable dye degradation. Each iron reducing agent inhibited degradation, oxalate had no effect, and malonate drastically increased the degradation rate. It is likely that malonate increased the degradation rate because it promoted rMnP production of Mn(III) chelates. Degradation in this rMnP system depended on the presence of rMnP and manganese, but occurred…
Advisors/Committee Members: Kelly, Christine J. (advisor), Kamke, Frederick A. (committee member).
Subjects/Keywords: lignin; Lignin – Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Goby, J. D. (2010). Experimental approach for the determination of lignin modification by manganese peroxidase. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/13827
Chicago Manual of Style (16th Edition):
Goby, Jeffrey Dean. “Experimental approach for the determination of lignin modification by manganese peroxidase.” 2010. Masters Thesis, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/13827.
MLA Handbook (7th Edition):
Goby, Jeffrey Dean. “Experimental approach for the determination of lignin modification by manganese peroxidase.” 2010. Web. 02 Mar 2021.
Vancouver:
Goby JD. Experimental approach for the determination of lignin modification by manganese peroxidase. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/13827.
Council of Science Editors:
Goby JD. Experimental approach for the determination of lignin modification by manganese peroxidase. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/13827

Ryerson University
12.
Kakar, Durkhani.
Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂.
Degree: 2010, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A6278
► The oxidation of benzene, toluene, ethylbenzene, and xylenes (BTEX) by advanced oxidation processes in water was investigated. The degradation of BTEX by UV-185 and UV-254…
(more)
▼ The oxidation of benzene, toluene, ethylbenzene, and xylenes (BTEX) by advanced oxidation processes in water was investigated. The degradation of BTEX by UV-185 and UV-254 nm in conjunction with H₂O₂ was studied. It was observed that the recommended H₂0₂ concentration to degrade 100 mgTOC/L of BTEX was 250 mg/L and 300 mg/L for UV-185 and UV-254 nm, respectively. In addition, it was observed that using the lamps in series did not have any advantages in the TOC removal of BTEX. Under acidic condition, pH 3, UV-185/H₂O₂ removed 10% more than UV-254/H₂O₂. At the recommended H₂O₂ concentration, 90% of BTEX mineralization was occurred with UV-185 nm/HO₂ under acidic condition of pH 3. It was observed that 21-32% BOD/TOC ratio of BTEX was decreased with an increase in residence time (within 140 min) in the photoreactor.
Subjects/Keywords: Organic photochemistry – Methodology.; Benzene – Biodegradation; Toluene – Biodegradation; Ethylbenzene – Biodegradation; Xylene – Biodegradation; Water – Purification
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kakar, D. (2010). Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A6278
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):
Kakar, Durkhani. “Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂.” 2010. Thesis, Ryerson University. Accessed March 02, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A6278.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kakar, Durkhani. “Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂.” 2010. Web. 02 Mar 2021.
Vancouver:
Kakar D. Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂. [Internet] [Thesis]. Ryerson University; 2010. [cited 2021 Mar 02].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6278.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kakar D. Photochemical degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) using UV/H₂0₂. [Thesis]. Ryerson University; 2010. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A6278
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology
13.
Gallagher, Noreen Anne.
Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents.
Degree: MS, Thomas H. Gosnell School of Life Sciences (COS), 2016, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9296
► Many wastewater treatment plants (WWTPs) are not properly equipped for the removal of various compounds, including non-steroidal anti-inflammatory drugs (NSAIDs), analgesics, and hormones. These…
(more)
▼ Many wastewater treatment plants (WWTPs) are not properly equipped for the removal of various compounds, including non-steroidal anti-inflammatory drugs (NSAIDs), analgesics, and hormones. These compounds are continually discharged into surface waters, which has become an emerging issue for environmental and public health. Microorganisms in the natural environment may play a crucial role in ecosystem self-purification processes such as contaminant degradation. The aim of this research was to determine if there were microorganisms from water and sediment samples located near wastewater effluent outfalls in Central and Western New York capable of degrading ibuprofen, naproxen, acetaminophen, and 17β-estradiol, and if the degradation capability of microorganisms varied by sampling site. An isolation approach was developed using serial enrichment in mineral medium containing each individual pharmaceutical as the sole carbon source available to heterotrophs. After four weeks of enrichment, bacteria were isolated and the growth of each isolate on its selected pharmaceutical source was measured. The
biodegradation of pharmaceuticals was then examined with the isolates that showed the most consistent growth. Results from the various enrichment experiments have led to the isolation of several heterotrophic bacteria capable of utilizing the compounds as their sole carbon sources. An isolate cultured from Payne Beach had the ability to remove up to 40.1% ± 3.9% of acetaminophen, 23.2% ± 5.7% of ibuprofen, and 18.6% ± 5.3% of 17β-estradiol and an isolate cultured from Charlotte Beach had the ability to remove up to 23.4% ± 3.5% of ibuprofen, 32.2% ± 2.5% of naproxen, and 29.1% ± 1.9% of 17β-estradiol. The data suggests that there are endogenous heterotrophs located near wastewater outfalls that can degrade various pharmaceuticals, and that the degradation capability of microorganisms on certain compounds may be site specific.
Advisors/Committee Members: Jeffrey Lodge.
Subjects/Keywords: Biodegradation; Bioremediation; Pharmaceuticals
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gallagher, N. A. (2016). Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9296
Chicago Manual of Style (16th Edition):
Gallagher, Noreen Anne. “Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents.” 2016. Masters Thesis, Rochester Institute of Technology. Accessed March 02, 2021.
https://scholarworks.rit.edu/theses/9296.
MLA Handbook (7th Edition):
Gallagher, Noreen Anne. “Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents.” 2016. Web. 02 Mar 2021.
Vancouver:
Gallagher NA. Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents. [Internet] [Masters thesis]. Rochester Institute of Technology; 2016. [cited 2021 Mar 02].
Available from: https://scholarworks.rit.edu/theses/9296.
Council of Science Editors:
Gallagher NA. Isolation of Pharmaceutical-Degrading Bacteria from Lake Sediments Associated with Wastewater Effluents. [Masters Thesis]. Rochester Institute of Technology; 2016. Available from: https://scholarworks.rit.edu/theses/9296

Texas A&M University
14.
Lee, Do Gyun.
Biodegradation of Triclosan by Aerobic Microorganisms.
Degree: PhD, Civil Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11865
► Triclosan, a synthetic antimicrobial agent, is an emerging environmental contaminant. Due to incomplete removal of triclosan by wastewater treatment plants, treated wastewater is one major…
(more)
▼ Triclosan, a synthetic antimicrobial agent, is an emerging environmental contaminant. Due to incomplete removal of triclosan by wastewater treatment plants, treated wastewater is one major source of environmental triclosan.
Biodegradation of triclosan has been observed in activated sludge and the environment, suggesting that it is possible to develop a cost-effective biotreatment strategy for triclosan removal from wastewater. However, current knowledge on triclosan
biodegradation is scarce and limited. To bridge this knowledge gap, this dissertation characterized cultivable triclosan-degrading microorganisms, identified uncultivable triclosan-utilizing bacteria, and elucidated triclosan
biodegradation pathways. Furthermore, two treatment strategies were examined to enhance triclosan
biodegradation in nitrifying activated sludge (NAS).
A wastewater bacterial isolate, Sphingopyxis strain KCY1 (hereafter referred as strain KCY1), can completely degrade triclosan with a stoichiometric release of chloride. This strain can retain its degradation ability toward triclosan when after grown in complex nutrient medium containing triclosan as low as 5 micrograms/L. Based on five identified metabolites, a meta-cleavage pathway was proposed for triclosan
biodegradation by strain KCY1. By using [13C12]-triclosan stable isotope probing, eleven uncultured triclosan-utilizing bacteria in a triclosan-degrading microbial consortium were identified. These clones are distributed among alpha-, beta-, or gamma-Proteobacteria, suggesting that triclosan-utilizing bacteria are phylogenetically diverse. None of these clone sequences were similar to known triclosan degraders.
Growth substrates affected the triclosan degradation potential of four selected oxygenase-expressing bacteria. Biphenyl-grown Burkholderia xenovorans LB400 and propane-grown Rhodococcus ruber ENV425 cannot degrade triclosan. On the other hand, propane- and 2-propanol-grown Mycobacterium vaccae JOB5 can degrade triclosan completely. Due to product toxicity, finite transformation capacities for triclosan were observed for Rhodococcus jostii RHA1 grown on biphenyl, propane, and LB medium with dicyclopropylketone (alkane monooxygenase inducer). Four chlorinated metabolites were detected during triclosan degradation by biphenyl-grown RHA1 and a meta-cleavage pathway was proposed.
Complete triclosan (5 mg/L) degradation was observed within 96 hrs in NAS receiving ammonia amendment (0 to 75 mg/L of NH4-N). The fastest triclosan degradation was observed in the NAS exhibiting the highest amount of ammonia. When ammonia oxidation was active in NAS, the amendment of strain KCY1 did not further enhance triclosan removal. Overall, the results suggested that triclosan
biodegradation can be enhanced by increasing the activity of ammonia oxidation in NAS.
Advisors/Committee Members: Chu, Kung-Hui (advisor), Autenrieth, Robin (committee member), McDonald, Thomas (committee member), Jayaraman, Arul (committee member).
Subjects/Keywords: Triclosan; biodegradation; cometbolism
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee, D. G. (2012). Biodegradation of Triclosan by Aerobic Microorganisms. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11865
Chicago Manual of Style (16th Edition):
Lee, Do Gyun. “Biodegradation of Triclosan by Aerobic Microorganisms.” 2012. Doctoral Dissertation, Texas A&M University. Accessed March 02, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11865.
MLA Handbook (7th Edition):
Lee, Do Gyun. “Biodegradation of Triclosan by Aerobic Microorganisms.” 2012. Web. 02 Mar 2021.
Vancouver:
Lee DG. Biodegradation of Triclosan by Aerobic Microorganisms. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11865.
Council of Science Editors:
Lee DG. Biodegradation of Triclosan by Aerobic Microorganisms. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11865

Texas Tech University
15.
-0881-9948.
Master of Science.
Degree: MSin Civil Engineering, Environmental Engineering, 2018, Texas Tech University
URL: http://hdl.handle.net/2346/82106
► Sediment capping is currently considered one of the most convenient and efficient risk containment strategy for conatminated sediments. Conventional capping consists of placing one or…
(more)
▼ Sediment capping is currently considered one of the most convenient and efficient risk
containment strategy for conatminated sediments. Conventional capping consists of
placing one or more layers of inert materials on top of the contaminated sediment,
retarding the flux of the pollutants to the water body and shielding the sediments from
erosion or resuspension. The introduction of adsorbent materials promotes
sequestration of the contaminants onto the capping media, but aging or leaks can affect
the efficiency of such a reactive-cap. In a bioreactive capping, the use of an adsorbent
material suitable for microbial colonization, facilitates both sequesteration and
biodegradation of the contaminant. The aim of study is to experimentally evaluate the
extent to which capping media selection affects bioactivity in model capping systems.
Bench top laboratory studies investigated biological activity in model systems consisting
of conventional capping materials (granular activated carbon [GAC], organoclay, and
sand), mineral media, pore water extracted from contaminated sediments, electron
acceptors (oxygen, nitrate, sulfate and iron) and the electron donor, naphthalene (a
model polycyclic aromatic hydrocarbon). Microcosms were prepared and inoculated
with microbial enrichements prepared with contaminated sediments collected from a
river adjacent to a former manufactured gas plant. Concentrations of naphthalene and
nahAc gene (encoding a dioxygenase associated with aerobic biotransformation of
PAHs), were monitored for 100. Experimental data were collected and modeled; the
relative kinetic rates were used to evaluate efficiencies of the different capping
materials.
Results suggest that GAC was the most efficient of the capping materials tested. Data
showed that naphthalene concentration decreases only in oxic sediment-cap systems
during the observation time, and naphthalene decay was statistically significant in oxic
microcosms prepared with GAC. Abundance of the nahAc gene was sustained in oxic
microcosms prepared with GAC and sand. Within oxic sediment-cap systems, a
relationship between the naphthalene mass in solution and the gene copy numbers was
observed in the microcosms prepared with activated carbon. This suggests that the
nature of the capping material affected the interaction between abundance of a
catabolic gene (nahAc) and concentration of the substrate (naphthalene).
Advisors/Committee Members: Millerick, Kayleigh (advisor), Reible, Danny D. (committee member), Jackson, W. Andrew (committee member).
Subjects/Keywords: Biodegradation; sediment; capping
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-0881-9948. (2018). Master of Science. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/82106
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-0881-9948. “Master of Science.” 2018. Masters Thesis, Texas Tech University. Accessed March 02, 2021.
http://hdl.handle.net/2346/82106.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-0881-9948. “Master of Science.” 2018. Web. 02 Mar 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-0881-9948. Master of Science. [Internet] [Masters thesis]. Texas Tech University; 2018. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/2346/82106.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-0881-9948. Master of Science. [Masters Thesis]. Texas Tech University; 2018. Available from: http://hdl.handle.net/2346/82106
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Oregon State University
16.
Weber, Ryan A.
Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii.
Degree: MS, Chemical Engineering, 2008, Oregon State University
URL: http://hdl.handle.net/1957/8937
► This study examines the interactions between explosive environmental contaminants and marine seaweeds. The scope of this thesis includes studies done on the explosive RDX with…
(more)
▼ This study examines the interactions between explosive environmental contaminants and marine seaweeds. The scope of this thesis includes studies done on the explosive RDX with tissue cultures of marine seaweeds, as well as studies on the explosive TNT with seaweed extracts.
The ability of two different marine species of macroalgae to take up and metabolize the nitroheterocyclic explosive RDX was examined. RDX uptake was analyzed using axenic microplantlet suspension culture systems of the red tropical seaweed Portieria hornemannii and the green temperate seaweed Acrosiphonia coalita. Algal tissue cultures were challenged with seawater containing an RDX concentration of 9.0 mg/L for an exposure time of 170 hours. The photosynthetic viability of the two different marine seaweeds was monitored using chlorophyll a fluorescence techniques. The photosynthetic viability study subjected suspension cultures of algal biomass to RDX concentrations of 9.0 and 18 mg/L for a duration of 40 minutes.
Algal suspensions of the marine seaweeds Portieria and Acrosiphonia did not take up or metabolize the nitroheterocyclic explosive RDX. Furthermore RDX was not shown
to have any effect on the photosynthetic viability of chlorophyll a fluorescence. The photosynthetic fluorescence parameter Fv/Fm did not change over short time periods of exposure to RDX. None of the associated chlorophyll a fluorescence parameters changed upon exposure to RDX concentrations of 9.0 mg/L and 18 mg/L. In conclustion these studies suggest that RDX cannot be bioremediated by macroalgae. Furthermore, RDX poses no toxic threat to photosynthesis of macroalgae.
The ability of crude and soluble extracts of the red tropical marine seaweed Portieria hornemannii to biotransform the aromatic explosive TNT into reductive metabolites was investigated. Crude extracts are defined as ground and homogenized algal tissue in phosphate buffer. Soluble extracts are defined as the decanted supernatant of crude extracts that have been centrifuged at 15,000 g for 10 minutes. The coenzymes NADPH and NADH were added as reducing agents to both the soluble and crude extracts. Crude and water soluble extracts of Portieria were shown to take up the aromatic explosive TNT. However no reductive biotransformation products of TNT, 2-ADNT and 4-ADNT were found in the liquid phase.
A simple model for TNT binding to amine-rich proteins in the algal biomass constituents was developed to account for removal of TNT from the liquid phase by both soluble and crude extracts of Portieria. TNT binding in crude extracts accounted for 92 % of the TNT in the liquid phase, whereas 34% of the TNT could be accounted for in crude extracts containing the coenzyme NADPH. The binding model accounted for all the TNT removal in soluble extracts. The addition of the coenzymes NADPH and NADH was shown to have no effect on TNT reduction by soluble extracts. In conclusion, these studies suggest that Portieria extracts are not capable of metabolizing TNT. However algal detritus does have a finite capacity for TNT…
Advisors/Committee Members: Rorrer, Gregory L (advisor), Kelly, Christine (committee member).
Subjects/Keywords: Explosive; Explosives – Biodegradation
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Chicago ·
MLA ·
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APA (6th Edition):
Weber, R. A. (2008). Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/8937
Chicago Manual of Style (16th Edition):
Weber, Ryan A. “Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii.” 2008. Masters Thesis, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/8937.
MLA Handbook (7th Edition):
Weber, Ryan A. “Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii.” 2008. Web. 02 Mar 2021.
Vancouver:
Weber RA. Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/8937.
Council of Science Editors:
Weber RA. Uptake and metabolism of the explosive RDX by the marine seaweeds Portieria hornemannii and Acrosiphonia coalita, and uptake of the explosive TNT by algal extracts of Portieria hornemannii. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/8937

Montana State University
17.
Cornachione, Matthew Aaron.
Reversible fuel cell performance and degradation.
Degree: MS, College of Engineering, 2011, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/1111
► This thesis presents the development of a test stand to characterize the performance of reversible solid oxide fuel cells. The test stand was used in…
(more)
▼ This thesis presents the development of a test stand to characterize the performance of reversible solid oxide fuel cells. The test stand was used in two different studies to determine the behavior of commercially available solid oxide fuel cells under varying steam percentage input and to compare the degradation incurred during fuel cell operation to that during electrolysis operation. The development of this test stand included construction of a water vapor delivery system using steam entrained in a hydrogen flow and a circuit built from high power op-amps to allow biasing of the fuel cell in both fuel cell and electrolysis mode. The test stand allows the steady state characteristics to be evaluated over a wide voltage range through current/voltage sweeps and the small signal behavior to be examined in-situ through the use of electrochemical impedance spectroscopy. These tests, as well as post-operation field emission scanning electron microscope observation, were used to determine that the cells perform comparably in both modes of operation though the cell resistance tends to be higher in electrolysis mode. It was also found that during extended operation these cells degrade significantly to the point of mechanical failure in electrolysis mode and thus may not be suitable for long term electrolysis operation. The equipment developed here can perform similar tests on newly designed reversible fuel cells to determine whether different materials choices or cell construction provide superior reversible performance and durability.
Advisors/Committee Members: Chairperson, Graduate Committee: Steven R. Shaw (advisor).
Subjects/Keywords: Fuel cells.; Biodegradation.
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APA ·
Chicago ·
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APA (6th Edition):
Cornachione, M. A. (2011). Reversible fuel cell performance and degradation. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/1111
Chicago Manual of Style (16th Edition):
Cornachione, Matthew Aaron. “Reversible fuel cell performance and degradation.” 2011. Masters Thesis, Montana State University. Accessed March 02, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/1111.
MLA Handbook (7th Edition):
Cornachione, Matthew Aaron. “Reversible fuel cell performance and degradation.” 2011. Web. 02 Mar 2021.
Vancouver:
Cornachione MA. Reversible fuel cell performance and degradation. [Internet] [Masters thesis]. Montana State University; 2011. [cited 2021 Mar 02].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/1111.
Council of Science Editors:
Cornachione MA. Reversible fuel cell performance and degradation. [Masters Thesis]. Montana State University; 2011. Available from: https://scholarworks.montana.edu/xmlui/handle/1/1111

University of North Texas
18.
Vidhate, Shailesh.
Biodegradable Poly(hydroxy Butyrate-co-valerate) Nanocomposites And Blends With Poly(butylene Adipate-co-terephthalate) For Sensor Applications.
Degree: 2011, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc103405/
► The utilization of biodegradable polymers is critical for developing “cradle to cradle” mindset with ecological, social and economic consequences. Poly(hydroxy butyrate-co-valerate) (PHBV) shows significant potential…
(more)
▼ The utilization of biodegradable polymers is critical for developing “cradle to cradle” mindset with ecological, social and economic consequences. Poly(hydroxy butyrate-co-valerate) (PHBV) shows significant potential for many applications with a polypropylene equivalent mechanical performance. However, it has limitations including high crystallinity, brittleness, small processing window, etc. which need to be overcome before converting them into useful products. Further the development of biodegradable strain sensing polymer sensors for structural health monitoring has been a growing need. In this dissertation I utilize carbon nanotubes as a self sensing dispersed nanofiller. The impact of its addition on PHBV and a blend of PHBV with poly(butylene adipate-co-terephthalate) (PBAT) polymer was examined. Nanocomposites and blends of PHBV, PBAT, and MWCNTs were prepared by melt-blending. The effect of MWCNTs on PHBV crystallinity, crystalline phase, quasi-static and dynamic mechanical property was studied concurrently with piezoresistive response. In PHBV/PBAT blends a rare phenomenon of melting point elevation by the addition of low melting point PBAT was observed. The blends of these two semicrystalline aliphatic and aromatic polyesters were investigated by using differential scanning calorimetry, small angle X-ray scattering, dynamic mechanical analysis, surface energy measurement by contact angle method, polarized optical and scanning electron microscopy, and rheology. The study revealed a transition of immiscible blend compositions to miscible blend compositions across the 0-100 composition range. PHBV10, 20, and 30 were determined to be miscible blends based on a single Tg and rheological properties. The inter-relation between stress, strain, morphological structure and piezoresistive response of MWCNT filled PHBV and PHBV/PBAT blend system was thoroughly investigated. The outcomes of piezoreistivity study indicated MWCNT filled PHBV and PHBV/PBAT blend system as a viable technology for structural health monitoring. Finally, the compostability of pure polymer, blend system, and MWCNT filled system was studied indicating that PBAT and CNT decreased the biodegradability of PHBV with CNT being a better contributor than PBAT.
Advisors/Committee Members: D'Souza, Nandika Anne, 1967-, Vaidyanathan, Vijay, Brostow, Witold, 1934-, Shepherd, Nigel, Bouanani, Mohamed El.
Subjects/Keywords: PHBV; blends; biodegradation
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Queens University
19.
Sun, Bozhi.
Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
.
Degree: Chemical Engineering, 2015, Queens University
URL: http://hdl.handle.net/1974/13474
► Biphenyl and dioxane biodegradation by poplar and willow rhizosphere microorganisms was studied in a phytoremediation test-plot contaminated with biphenyl and dioxane. A dioxane-degrading consortium enriched…
(more)
▼ Biphenyl and dioxane biodegradation by poplar and willow rhizosphere microorganisms was studied in a phytoremediation test-plot contaminated with biphenyl and dioxane. A dioxane-degrading consortium enriched from the contaminated rhizosphere soil did not use dioxane as the sole source of carbon and energy, but did co-metabolize dioxane in the presence of tetrahydrofuran (THF). An isolate obtained on agar plates containing basal salts and glucose grew on glucose and co-metabolically degraded dioxane after THF degradation. The rate and extent of dioxane degradation by this particular isolate increased with increasing THF concentration. This isolate was subsequently identified as a Flavobacterium by 16S rDNA sequencing. This is the first report of a dioxane-degrading Flavobacterium which is phylogenetically distinct from any previously identified dioxane degrader.
Rhizosphere microorganisms in the phytoremediation test-plot were capable of degrading biphenyl in the presence of the terminal electron acceptors (TEAs) nitrate, sulfate or carbon dioxide. TEAs (sulfate and carbon dioxide), nutrients in basal salts medium (BSM) or fertilizer enhanced biphenyl degradation. Although root exudates appeared to enhance biphenyl degradation slightly, it was not statistically significant (p > 0.10). A fungus enriched and isolated from the rhizosphere soil, was found to degrade biphenyl under anaerobic conditions only. The fungus was identified by a primer pair ITS4 and ITS1F as Pseudallescheria boydii.
The microbial community in the rhizosphere of the poplar and willow trees was sampled from different soil locations in the test-plot over a 5-year period. The denaturing gradient gel electrophoresis (DGGE) results indicated that soil type had a significant impact on microbial community composition with a more diverse microbial population in native soil samples than in engineered soil samples. Although tree type had less influence on microbial diversity, diversity did decrease with time in the engineered soil of the willow rhizosphere. There was no significant influence of soil depth on the microbial community. Three aerobic biphenyl-degrading consortia were enriched from different rhizosphere soils, and the major microorganisms found in the enriched consortia were identified by 16S DNA sequencing as being in the family of Flavobacteriaceae, Alcaligenaceae, and Mycobacteriaceae.
Direct polymerase chain reaction (DPCR) without prior DNA extraction and DGGE yielded the same results as PCR assays using extracted DNA in the analysis of microbial populations in dioxane- and biphenyl-degrading consortia. Therefore, the combination of DPCR and DGGE has the potential for the fast analysis of the microbial populations of environmental and clinical samples with limited diversity.
Subjects/Keywords: Chemical Engineering
;
Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sun, B. (2015). Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13474
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):
Sun, Bozhi. “Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
.” 2015. Thesis, Queens University. Accessed March 02, 2021.
http://hdl.handle.net/1974/13474.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sun, Bozhi. “Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
.” 2015. Web. 02 Mar 2021.
Vancouver:
Sun B. Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1974/13474.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sun B. Rhizosphere/Soil Microorganisms in the Phytoremediation of Biphenyl and Dioxane
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13474
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rutgers University
20.
LIU, JIE, 1988-.
Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments.
Degree: PhD, Microbial Biology, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/60034/
► Organohalides are widespread in the environment from both anthropogenic and natural sources. The marine environment is a major reservoir of organohalides, particularly organobromides. Organohalide respiration…
(more)
▼ Organohalides are widespread in the environment from both anthropogenic and natural sources. The marine environment is a major reservoir of organohalides, particularly organobromides. Organohalide respiration is the process mediated by bacteria that utilize organohalides as electron acceptors for energy conservation. This process is of importance in the degradation organohalide pollutants and the overall organohalide cycle. The objective of this study was to investigate the ecophysiology of organohalide respiring bacteria (OHRBs) with a focus on examining their utilization of organobromine compounds, evaluating their substrate range and activity under different conditions, and determining their reductive dehalogenase gene diversity and gene expression.
Investigation of Desulfoluna spongiiphila, a marine sponge associated organobromide-respiring bacterium, revealed that the expression of one reductive dehalogenase gene was significantly upregulated in response to bromophenol and sponge extracts. The transcriptomic and proteomic analysis further confirmed the function of this reductive dehalogenase gene in reductive dehalogenation of bromophenol. Two bacterial strains with organobromide respiring ability were isolated from New Jersey estuarine sediments, which are representatives of a novel Halodesulfovibrio species. Three reductive dehalogenase genes are present in their genomes, one of which showed significant upregulation in gene expression in response to bromophenols. In addition, the overall organohalide respiring capacity of members of the Class Deltaproteobacteria was evaluated by surveying the genome database for the prevalence of reductive dehalogenase genes in their genomes. Result showed that approximately 10% of Deltaproteobacteria contain reductive dehalogenase genes in their genomes, which is an indicator for potential organohalide respiring ability. Three of these strains were experimentally confirmed to have organobromide respiring ability. In total, six organobromide respiring Deltaproteobacteria, all marine or estuarine origin, were investigated in this study. One common reductive dehalogenase gene cluster (namely brp gene) was present in all the genomes and the expression of brpA gene was significantly upregulated in the presence of bromophenols in all the strains. This study highlights the potential role of Deltaproteobacteria in the marine organohalide cycle.
Advisors/Committee Members: Häggblom, Max M (chair), Kerkhof, Lee (internal member), Vetriani, Costantino (internal member), Fennell, Donna (outside member), School of Graduate Studies.
Subjects/Keywords: Biodegradation; Bacteria – Morphology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
LIU, JIE, 1. (2019). Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/60034/
Chicago Manual of Style (16th Edition):
LIU, JIE, 1988-. “Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments.” 2019. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/60034/.
MLA Handbook (7th Edition):
LIU, JIE, 1988-. “Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments.” 2019. Web. 02 Mar 2021.
Vancouver:
LIU, JIE 1. Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments. [Internet] [Doctoral dissertation]. Rutgers University; 2019. [cited 2021 Mar 02].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60034/.
Council of Science Editors:
LIU, JIE 1. Discovering the organohalide respiring capacity of Deltaproteobacteria in marine and estuarine environments. [Doctoral Dissertation]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60034/

Rutgers University
21.
Heenan, Jeffrey William, 1987-.
Geo-electrical monitoring of hydrocarbon degradation.
Degree: PhD, Environmental Science, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/61580/
► The current focus on identifying and remediating contamination calls for further investigation into methods that can be used to efficiently characterize subsurface conditions and monitor…
(more)
▼ The current focus on identifying and remediating contamination calls for further investigation into methods that can be used to efficiently characterize subsurface conditions and monitor degradation processes. The primary focus of this research is the latter. Electrical geophysical methods have been well documented as a tool to map aquifers and contaminant plumes, and the same principles that allow for those surveys to be successful allow for these methods to be beneficial for monitoring the progress of remediation. Chemical and physical changes in the subsurface, known to result from biodegradation processes, could be monitored using these methods in situ.This research provides several examples of these methods being effective in monitoring biodegradation. Spectral induced polarization measurements collected over time in a column experiment demonstrate the sensitivity of the method to processes related to microbial induced oil break up, as a result of microbial enhanced oil recovery processes. In another study taking place over the course of approximately 18 months, a progressive decrease in the resistivity of a massive oil spill (Deepwater Horizon) impacted region was observed. Advanced analysis of resistivity variations within the imaged area showed that long-term decreases in resistivity were largely associated with the impacted sediments. Finally, self potential measurements collected at a mature oil spill site, where bioremediation is known to have occurred, showed a measureable, biogeobattery related, response. In all cases, these methods showed the sensitivity of electrical geophysical methods to biodegradation processes. This demonstrates the potential utility of these methods being used an effect monitoring tool to be used in complement with more invasive and expensive chemical/biological testing.
Advisors/Committee Members: Heenan, Jeffrey William, 1987- (author), Ntarlagiannas, Dimitrios (chair), Slater, Lee (internal member), Atekwana, Estella (outside member), Werkema, Dale (outside member).
Subjects/Keywords: Biogeophyiscs; Biodegradation; Bioremediation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Heenan, Jeffrey William, 1. (2017). Geo-electrical monitoring of hydrocarbon degradation. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/61580/
Chicago Manual of Style (16th Edition):
Heenan, Jeffrey William, 1987-. “Geo-electrical monitoring of hydrocarbon degradation.” 2017. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/61580/.
MLA Handbook (7th Edition):
Heenan, Jeffrey William, 1987-. “Geo-electrical monitoring of hydrocarbon degradation.” 2017. Web. 02 Mar 2021.
Vancouver:
Heenan, Jeffrey William 1. Geo-electrical monitoring of hydrocarbon degradation. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2021 Mar 02].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61580/.
Council of Science Editors:
Heenan, Jeffrey William 1. Geo-electrical monitoring of hydrocarbon degradation. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61580/

University of Manchester
22.
Mollasalehi, Somayeh.
Fungal biodegradation of polyvinyl alcohol in soil and compost environments.
Degree: PhD, 2013, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/fungal-biodegradation-of-polyvinyl-alcohol-in-soil-and-compost-environments(83f0d3a8-c24a-400b-b297-57d165fbd97c).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588131
► For over 50 years, synthetic petrochemical-based plastics have been produced in ever growing volumes globally and since their first commercial introduction; they have been continually…
(more)
▼ For over 50 years, synthetic petrochemical-based plastics have been produced in ever growing volumes globally and since their first commercial introduction; they have been continually developed with regards to quality, colour, durability, and resistance. With some exceptions, such as polyurethanes, most plastics are very stable and are not readily degraded when they enter the ground as waste, taking decades to biodegrade and therefore are major pollutants of terrestrial and marine ecosystems. During the last thirty years, extensive research has been conducted to develop biodegradable plastics as more environmentally benign alternatives to traditional plastic polymers. Polyvinyl alcohol (PVA) is a water-soluble polymer which has recently attracted interest for the manufacture of biodegradable plastic materials. PVA is widely used as a paper coating, in adhesives and films, as a finishing agent in the textile industries and in forming oxygen impermeable films. Consequently, waste-water can contain a considerable amount of PVA and can contaminate the wider environment where the rate of biodegradation is slow. Despite its growing use, relatively little is known about its degradation and in particular the role of fungi in this process. In this study, a number of fungal strains capable of degrading PVA from uncontaminated soil from eight different sites were isolated by enrichment in mineral salts medium containing PVA as a sole carbon source and subsequently identified by sequencing the ITS and 5.8S rDNA region. The most frequently isolated fungal strains were identified as Galactomyces geotrichum, Trichosporon laibachii, Fimetariella rabenhorsti and Fusarium oxysporum. G. geotrichum was shown to grow and utilise PVA as the sole carbon source with a mean doubling time of ca. 6-7 h and was similar on PVA with molecular weight ranges of 13-23 KDa, 30-50 KDa and 85-124 KDa. When solid PVA films were buried in compost, Galactomyces geotrichum was also found to be the principal colonizing fungus at 25°C, whereas at 45°C and 55°C, the principle species recovered was the thermophile Talaromyces emersonii. ESEM revealed that the surface of the PVA films were heavily covered with fungal mycelia and DGGE analysis of the surface mycelium confirmed that the fungi recovered from the surface of the PVA film constituted the majority of the colonising fungi. When PVA was added to soil at 25°C, and in compost at 25°C and 45°C, terminal restriction fragment length polymorphism (T-RFLP) revealed that the fungal community rapidly changed over two weeks with the appearance of novel species, presumably due to selection for degraders, but returned to a population that was similar to the starting population within six weeks, indicating that PVA contamination causes a temporary shift in the fungal community.
Subjects/Keywords: 620.1; fungal biodegradation; biodeterioration; biodegradation; biodegradation of polyvinyl alcohol; polyvinyl alcohol
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mollasalehi, S. (2013). Fungal biodegradation of polyvinyl alcohol in soil and compost environments. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/fungal-biodegradation-of-polyvinyl-alcohol-in-soil-and-compost-environments(83f0d3a8-c24a-400b-b297-57d165fbd97c).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588131
Chicago Manual of Style (16th Edition):
Mollasalehi, Somayeh. “Fungal biodegradation of polyvinyl alcohol in soil and compost environments.” 2013. Doctoral Dissertation, University of Manchester. Accessed March 02, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/fungal-biodegradation-of-polyvinyl-alcohol-in-soil-and-compost-environments(83f0d3a8-c24a-400b-b297-57d165fbd97c).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588131.
MLA Handbook (7th Edition):
Mollasalehi, Somayeh. “Fungal biodegradation of polyvinyl alcohol in soil and compost environments.” 2013. Web. 02 Mar 2021.
Vancouver:
Mollasalehi S. Fungal biodegradation of polyvinyl alcohol in soil and compost environments. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Mar 02].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/fungal-biodegradation-of-polyvinyl-alcohol-in-soil-and-compost-environments(83f0d3a8-c24a-400b-b297-57d165fbd97c).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588131.
Council of Science Editors:
Mollasalehi S. Fungal biodegradation of polyvinyl alcohol in soil and compost environments. [Doctoral Dissertation]. University of Manchester; 2013. Available from: https://www.research.manchester.ac.uk/portal/en/theses/fungal-biodegradation-of-polyvinyl-alcohol-in-soil-and-compost-environments(83f0d3a8-c24a-400b-b297-57d165fbd97c).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588131

Rutgers University
23.
Roberts, Aakansha Jessica.
Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation.
Degree: PhD, Microbial Biology, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62983/
► Diphenylmethane, biphenyl, and diphenylether are common contaminants in a former industrial site along the Passaic River with similar structures that are of interest due to…
(more)
▼ Diphenylmethane, biphenyl, and diphenylether are common contaminants in a former industrial site along the Passaic River with similar structures that are of interest due to their toxicity. This work identifies strains involved in their degradation, and the genes involved in the pathways for their degradation. Based on 16s rRNA analysis three phylogenetically diverse Pseudomonas species were isolated from the contaminated site based on their ability to grow on diphenylmethane. They were named Pseudomonas sp. AJR09, Pseudomonas stutzeri AJR13, and Pseudomonas sp. AJR20. The strains were later tested on biphenyl and were found to be able to metabolize it using the same pathway as for diphenylmethane degradation. All three strains were found to contain identical dioxygenase gene sequences. The presence of the identical genes in three diverse species led us to the conclusion that the genes must be horizontally transferred in the environment. Based on the phenotype conferred by the element and the fact that one strain had previously lost the ability to grow on the substrates tested, we hypothesized that the element was an Integrative and Conjugative Element. Integrative and Conjugative Elements (ICE) are a family of mobile genetic elements that can be transferred between different cells/organisms, and once in the recipient they integrate into the host’s chromosome using specific recombination sites. One of the three strains, the P. stutzeri AJR13, was successfully mated with the well characterized P. putida KT2440 which subsequently gained the ability to grow on biphenyl, diphenylmethane, and salicylate. This demonstrated the ability of the genes to self-mobilize leading us to believe that the genes for degradation of the three compounds must be horizontally transferred in the environment. The whole genomes of the three Passaic River strains and the KT2440 recipient were sequenced and assembled to reveal that the degradative genes are indeed present on an ICE. The ICE is about 128 kb in length and inserts at a short sequence at the end of a tRNA Gly (CCC). It contains an integrase and other genes involved in the transfer of the ICE, and genes for diphenylmethane/biphenyl and salicylate degradation. It also contains a number of repeated sequences. We noticed that mutations in the ICE were necessary in order to demonstrate growth similar to the wildtype. Our work demonstrates that integrative and conjugative elements play a large role in the spread of biodegradative genes in the environment. Another aim was to characterize a dioxygenase gene involved in the degradation of diphenylether. Only a few bacteria have been isolated for growth on diphenylether (DPE) as the sole carbon and energy source. Sphingobium sp. strain SS3 is perhaps the best studied diphenylether degrading strain with characterization of the catabolic pathway in the 1990s by investigators at the University of Hamburg. The DPE catabolic pathway is initiated by a dioxygenase attack resulting in the formation of catechol and phenol. We have sequenced the SS3…
Advisors/Committee Members: Zylstra, Gerben J (chair), Barkay, Tamar (internal member), Fennell, Donna E (internal member), Kukor, Jerome J (outside member), School of Graduate Studies.
Subjects/Keywords: Diphenylmethane; Biphenyl compounds – Biodegradation; Methane – Biodegradation; Ethers – Biodegradation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
Roberts, A. J. (2020). Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62983/
Chicago Manual of Style (16th Edition):
Roberts, Aakansha Jessica. “Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation.” 2020. Doctoral Dissertation, Rutgers University. Accessed March 02, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62983/.
MLA Handbook (7th Edition):
Roberts, Aakansha Jessica. “Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation.” 2020. Web. 02 Mar 2021.
Vancouver:
Roberts AJ. Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation. [Internet] [Doctoral dissertation]. Rutgers University; 2020. [cited 2021 Mar 02].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62983/.
Council of Science Editors:
Roberts AJ. Genetic and functional characterization of biphenyl, diphenylmethane, and diphenylether degradation. [Doctoral Dissertation]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62983/

NSYSU
24.
Yu, Tsung-Lin.
Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment.
Degree: Master, Marine Environment and Engineering, 2003, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0629103-171040
► Taiwan is an island country. Therefore, it must depend on sea and air transport to communicate with other countried. Especially, the import and export of…
(more)
▼ Taiwan is an island country. Therefore, it must depend on sea and air transport to communicate with other countried. Especially, the import and export of cargo rely on the sea transport. Nowadays, some ships still use diesel oil as fuel. During the transport, the ship is inevitable for leak, or accidents happening in marine environment. Therefore, in this research, through the man-made sifting way, we will sieve and purify the pure species bacteria, which can degrade the PAHs in diesel fuel floating on the sea surface to decrease its pollution to the marine environment.
In this research, eight species of pure bacteria will be sifted to purify. After primarily degrading experiment, we found that the second species of the bacteria performed the best degrading effect. After further identification, it was known that the second species of bacteria was yeast with name of Candida viswanathii. The bacteria were then used to in this study on
biodegradation of PAHs in the diesel fuel. According to the experimental results, we found that bacteria could degrade diesel fuel. The OD value and total amount of the bacteria were found to be increased, but showed less degrading effect on PAHs in diesel fuel. However, in the experiment regarding the bacteria against single kind of PAHs, it showed excellent degrading effect on Naphthalene. When the initial concentration of Napthalene was controlled at 10 mg/L, the degrading rates were 0.3 and 0.24 mg/L-day respectively, in two separate experiments. Concerned with the degrading experiment against Anthracene, learned from the chromatography diagram it was observed that the concentration controlled at 10 and 5 mg/L, the production rate of Naphthalene were measured equal to 0.049 and 0.028 mg/L-day respectively. Thus, it was concluded that Anthracene can be degraded by the bacteria, but the degrading rate was slow, and the metabolite might be Naphthalene. As for the Flouranthene, the bacteria presented no degrading effect on it. It was concluded that the bacteria might not degrading ability toward four-ring or above PAHs.
In conclusion, it is quite difficult to use single species of bacteria to deal with highly-complicated organic. It is suggested that we should study more about the degrading character of every species of bacteria. After that, we can get better effect by using similar compound bacteria to deal with the PAHs in the diesel oil.
Advisors/Committee Members: Ming-Shean Chou (chair), Pear-Hsiu-Ping Lin (chair), Lei Yang (committee member).
Subjects/Keywords: Biodegradation; PAHs
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yu, T. (2003). Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0629103-171040
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):
Yu, Tsung-Lin. “Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment.” 2003. Thesis, NSYSU. Accessed March 02, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0629103-171040.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yu, Tsung-Lin. “Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment.” 2003. Web. 02 Mar 2021.
Vancouver:
Yu T. Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment. [Internet] [Thesis]. NSYSU; 2003. [cited 2021 Mar 02].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0629103-171040.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yu T. Biodegradation of PAHs in Diesel Fuel by Candida viswanathii in Salty Environment. [Thesis]. NSYSU; 2003. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0629103-171040
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
25.
Taylor, Anne Elizabeth.
Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria.
Degree: PhD, Civil Engineering, 2008, Oregon State University
URL: http://hdl.handle.net/1957/9557
► This thesis explores the factors limiting the alkene substrate range of the vinyl chloride (VC)-utilizing bacteria, and describes a method for measuring VC transformation in…
(more)
▼ This thesis explores the factors limiting the alkene substrate range of the vinyl chloride (VC)-utilizing bacteria, and describes a method for measuring VC transformation in situ. Vinyl fluoride (VF) was evaluated as a surrogate for monitoring aerobic VC-transformation utilizing three isolates, Mycobacterium EE13a, Mycobacterium JS60 and Nocardioides JS614. JS614 grew on VF in addition to VC, making it the first bacterium reported to use VF as a sole carbon and energy source. There was little difference among the three strains in Ks or kmax for VC or VF. Rates of VF transformation and F- accumulation were correlated with the rate of VC transformation through a competitive inhibition model, and showed promise for estimating VC rates in situ.
Addition of supplemental ethene oxide (EtO) extended the growth substrate range of JS614 to propene, butene, and vinyl bromide (VB), whereas propene oxide (PrO) and butene oxide had no effect. Despite EtO and PrO being both inducers of AkMO and EaCoMT and intermediates in the alkene metabolic pathway, they exerted reversible inhibition on growth. Poor growth on propene was likely caused by the low rate of PrO consumption compared to PrO production which caused PrO accumulation to inhibitory levels; and reduced net reductant gain caused by a combination of PrO consumption "bottleneck" and the requirement of a NADPH-dependent CoM-carboxylase for metabolism of ≥C₃ alkenes. EtO consumption was inhibited by PrO, but overall the combined rate of EtO plus PrO consumption was better than that of PrO alone, perhaps explaining the beneficial effect of EtO as generating reductant to support growth on propene.
EtO-stimulated growth on VB was significantly slower than growth rates on VF and VC, but the maximum rate of VB consumption by Eth-grown cells was actually ~50% greater. Since 30% of the maximum rate of EtO consumption accompanied the maximum rate of VB consumption, it indicated that the "epoxide consumption bottle neck" must also apply to VB-epoxide, and is likely a factor limiting effective VB metabolism. VB was more inhibitory to growth of JS614 both on acetate and during active turnover than either VC and VF.
Advisors/Committee Members: Semprini, Lewis (advisor), Bottomley, Peter J (committee member).
Subjects/Keywords: Nocardioides JS614; Vinyl chloride – Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Taylor, A. E. (2008). Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/9557
Chicago Manual of Style (16th Edition):
Taylor, Anne Elizabeth. “Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria.” 2008. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/9557.
MLA Handbook (7th Edition):
Taylor, Anne Elizabeth. “Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria.” 2008. Web. 02 Mar 2021.
Vancouver:
Taylor AE. Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria. [Internet] [Doctoral dissertation]. Oregon State University; 2008. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/9557.
Council of Science Editors:
Taylor AE. Factors controlling halogenated and nonhalogenated alkene growth
substrate range of vinyl chloride-utilizing bacteria. [Doctoral Dissertation]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/9557
26.
Zaheer, rehan.
Photochemical studies on photosensitizing
drugs; -.
Degree: Chemistry, 2014, Aligarh Muslim University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/28510
Abstract available newline
Bibliography p.i-xv
Advisors/Committee Members: Jawaid, Iqbal.
Subjects/Keywords: biodegradation; chlorophenols
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zaheer, r. (2014). Photochemical studies on photosensitizing
drugs; -. (Thesis). Aligarh Muslim University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/28510
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):
Zaheer, rehan. “Photochemical studies on photosensitizing
drugs; -.” 2014. Thesis, Aligarh Muslim University. Accessed March 02, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/28510.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zaheer, rehan. “Photochemical studies on photosensitizing
drugs; -.” 2014. Web. 02 Mar 2021.
Vancouver:
Zaheer r. Photochemical studies on photosensitizing
drugs; -. [Internet] [Thesis]. Aligarh Muslim University; 2014. [cited 2021 Mar 02].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28510.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zaheer r. Photochemical studies on photosensitizing
drugs; -. [Thesis]. Aligarh Muslim University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/28510
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Irvine
27.
Cheung, Yuen Ming.
Biodegradation of Microcystins by Bacterial Consortia.
Degree: Engineering, 2015, University of California – Irvine
URL: http://www.escholarship.org/uc/item/8c01g1jj
► Increases in frequency and intensity of freshwater cyanobacterial blooms (cyanoHABs) place significant challenges to drinking water plants for human health protection from exposure to algal…
(more)
▼ Increases in frequency and intensity of freshwater cyanobacterial blooms (cyanoHABs) place significant challenges to drinking water plants for human health protection from exposure to algal toxins. Specifically, microcystins (MC), the hepatotoxin produced by cyanobacteria, is not effectively removed by the current water treatment processes. The goal of this study is to isolate and characterize bacteria that are capable of degrading MC in order to develop biofilters that can effectively remove the toxin. Water and sediment samples from a drinking water reservoir and a freshwater pond were collected and enriched for MC degrading bacteria. Among nearly 100 fast growing bacterial isolates were obtained from the enrichment culture and identified by gene sequencing, none were MC degraders due to the carryover of the trace amount of ethanol in the MC stock that were used by fast growing non-degraders. On the contrary, the bacterial consortia obtained from enrichment cultures can efficiently degrade MC. Although both consortia enriched in the presence or absence of ethanol can perform MC degradation, the degradation rates were improved for most of the consortia when the ethanol was removed from the enrichment culture in spite of lower cell growth rate. This indicates that the fast growing bacteria in the enrichment culture are not the key players in the degradation of MC. Bacterial community analysis also confirmed the higher diversity in consortia associated with ethanol. However, there is not a clear separation of bacterial diversity between the MC degrading and non-degrading consortia, indicating the complexity of consortia in MC degradation.
Subjects/Keywords: Environmental engineering; Biodegradation; Consortia; Microcystins
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cheung, Y. M. (2015). Biodegradation of Microcystins by Bacterial Consortia. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/8c01g1jj
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):
Cheung, Yuen Ming. “Biodegradation of Microcystins by Bacterial Consortia.” 2015. Thesis, University of California – Irvine. Accessed March 02, 2021.
http://www.escholarship.org/uc/item/8c01g1jj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cheung, Yuen Ming. “Biodegradation of Microcystins by Bacterial Consortia.” 2015. Web. 02 Mar 2021.
Vancouver:
Cheung YM. Biodegradation of Microcystins by Bacterial Consortia. [Internet] [Thesis]. University of California – Irvine; 2015. [cited 2021 Mar 02].
Available from: http://www.escholarship.org/uc/item/8c01g1jj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cheung YM. Biodegradation of Microcystins by Bacterial Consortia. [Thesis]. University of California – Irvine; 2015. Available from: http://www.escholarship.org/uc/item/8c01g1jj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta
28.
Zhao, Yi.
Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada.
Degree: MS, Department of Earth and Atmospheric
Sciences, 2009, University of Alberta
URL: https://era.library.ualberta.ca/files/xk81jm35n
► The Upper Devonian Grosmont reservoir in Alberta, Canada, is the single largest carbonate bitumen reservoir in the world, with an estimated 400 billion barrels of…
(more)
▼ The Upper Devonian Grosmont reservoir in Alberta,
Canada, is the single largest carbonate bitumen reservoir in the
world, with an estimated 400 billion barrels of bitumen in place.
The Grosmont bitumen formed from light crude oil via extensive
biodegradation, which produced extremely high in-situ viscosities
of >1 million cP. Forty nine samples from fifteen wells were
selected for rheological behavior, viscosity, and biodegradation
pattern analysis. In addition, various methods of viscosity
determination were compared. Results indicate that the Grosmont
bitumen is essentially a non-Newtonian fluid at in-situ conditions,
exhibiting a distinctive shear-thinning behavior at T <
40°C. Neglecting this character will cause inaccurate viscosity
measurements. The viscosity variations in the Grosmont reservoir
are cyclic with depth and are stratigraphically controlled. The
bitumen exhibits 3 levels of biodegradation. Biodegradation
parameters from hopanes and tricyclic terpanes may potentially be
used for bitumen quality prediction.
Subjects/Keywords: Biodegradation; Viscosity; Bitumen; Grosmont; Rheology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhao, Y. (2009). Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/xk81jm35n
Chicago Manual of Style (16th Edition):
Zhao, Yi. “Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada.” 2009. Masters Thesis, University of Alberta. Accessed March 02, 2021.
https://era.library.ualberta.ca/files/xk81jm35n.
MLA Handbook (7th Edition):
Zhao, Yi. “Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada.” 2009. Web. 02 Mar 2021.
Vancouver:
Zhao Y. Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada. [Internet] [Masters thesis]. University of Alberta; 2009. [cited 2021 Mar 02].
Available from: https://era.library.ualberta.ca/files/xk81jm35n.
Council of Science Editors:
Zhao Y. Petrophysical properties of bitumen from the Upper Devonian
Grosmont reservoir, Alberta, Canada. [Masters Thesis]. University of Alberta; 2009. Available from: https://era.library.ualberta.ca/files/xk81jm35n

University of Alberta
29.
Wang, Nan.
Ozonation and biodegradation of oil sands process
water.
Degree: MS, Department of Civil and Environmental
Engineering, 2011, University of Alberta
URL: https://era.library.ualberta.ca/files/5x21tg63p
► To ensure oil sands process water (OSPW) is suitable for discharge into the environment, advanced water treatment technologies are required. In this study, integrated ozonation-biodegradation…
(more)
▼ To ensure oil sands process water (OSPW) is suitable
for discharge into the environment, advanced water treatment
technologies are required. In this study, integrated
ozonation-biodegradation was investigated as a potential treatment
option for OSPW. The treatment efficiency was evaluated in terms of
naphthenic acid (NA) degradation, chemical oxygen demand (COD),
carbonaceous Biological oxygen demand (CBOD), and acute toxicity
reduction. Degradation of NAs of more than 99% was achieved using a
semi-batch ozonation system at a utilized ozone dose of 80 mg/L
combined with subsequent biodegradation. The results also show that
ozone decreased the amount of COD while increasing the
biodegradability of COD. It was noted that the carbon number and
number of NA rings influenced the level of NA oxidation. With a
utilized ozone dose of approximately 100 mg/L, the ozonated and
biodegraded treated OSPW showed no toxic effect towards bacterium
Vibrio fischeri. The results of this study indicate that integrated
ozonation-biodegradation is a promising treatment technology for
OSPW.
Subjects/Keywords: ozonation; naphthenic acid; toxicity; biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, N. (2011). Ozonation and biodegradation of oil sands process
water. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/5x21tg63p
Chicago Manual of Style (16th Edition):
Wang, Nan. “Ozonation and biodegradation of oil sands process
water.” 2011. Masters Thesis, University of Alberta. Accessed March 02, 2021.
https://era.library.ualberta.ca/files/5x21tg63p.
MLA Handbook (7th Edition):
Wang, Nan. “Ozonation and biodegradation of oil sands process
water.” 2011. Web. 02 Mar 2021.
Vancouver:
Wang N. Ozonation and biodegradation of oil sands process
water. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2021 Mar 02].
Available from: https://era.library.ualberta.ca/files/5x21tg63p.
Council of Science Editors:
Wang N. Ozonation and biodegradation of oil sands process
water. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/5x21tg63p

Oregon State University
30.
McAuliffe, David.
Interaction of ethofumesate with dry soil.
Degree: PhD, Crop Science, 1983, Oregon State University
URL: http://hdl.handle.net/1957/41416
► Previous studies have shown loss of ethofumesate activity when the herbicide was applied to dry soil (2% w/w moisture content) in both field and greenhouse…
(more)
▼ Previous studies have shown loss of ethofumesate activity when
the herbicide was applied to dry soil (2% w/w moisture content) in
both field and greenhouse studies, even when rainfall or irrigation
was received within a few days. Laboratory studies were conducted to
determine the mechanism for this activity loss. Dry soils (Woodburn
silt loam, 2% moisture) were treated with 20 ppmw radiolabeled ethofumesate
and were either wetted immediately to 35% moisture or remained
dry for 4 days before wetting. After equilibration, the soil
samples were centrifuged to extract the soil solution for analysis.
Radiolabeled ethofumesate and degradation products in the soil
solution were separated by thin-layer and column chromatography and
assayed by liquid scintillation. Ethofumesate and metabolites also
were extracted with methanol 4 days after herbicide application from
both dry and wetted soils. After extraction, the soil samples were
oxidized to determine the quantity of radioactivity remaining in the
soil.
Ethofumesate degradation, as affected by soil moisture, pH,
temperature, and the length of time soils remained dry after herbicide
application, was studied in a Woodburn soil. Several soil
moisture levels were maintained between 0.7 and 6.7% (w/w) by placing
soil samples in desiccators at various relative humidities. To
ascertain the effect of pH, the soil reaction was adjusted to 3.9,
4.9, 7.0, 8.0, and 9.0 prior to drying and treatment. The influence
of soil temperature on degradation was determined by incubating dry
soil samples at temperatures from 20 to 50 C and constant relative
humidity. The time period between ethofumesate application and soil
wetting was varied between 0 and 8 days to study the rate of ethofumesate
degradation. To determine the effect of soil type, the
herbicide was applied to air-dried Woodburn, Dayton, Madras, and
Agency soils. All soil samples were treated with 20 ppmw ethofumesate.
Ethofumesate applied to soil that remained dry for 4 days
degraded in significant quantities to two metabolites, while little
ethofumesate degraded in soils wetted immediately. The major metabolite
accounted for more than 80% of the degradation products and
was identified by gas chromatography and mass spectroscopy to be an
oxidation product, 2, 3- dihydro- 3,3- dimethyl- 2- oxo -5- benzofuranyl
methanesulfonate. The second metabolite was not identified.
The percentage of applied ethofumesate that was tightly
adsorbed, not extracted with methanol, was at least 5% greater for
applications to soils that remained dry than for soils that were
wetted immediately..
Soil moisture levels substantially influenced metabolite formation.
Increasing moisture contents to greater than 3% (w/w) reduced
degradation to negligible levels. Rapid ethofumesate degradation
occurred at soil moisture levels between 1 and 3%. Metabolites were detected 1 day after application to soils at 2% moisture content and
as much as 18% of the ethofumesate was degraded in 4 days.
Degradation was four to five…
Advisors/Committee Members: Appleby, Arnold P. (advisor), Moore, Thomas (committee member).
Subjects/Keywords: Herbicides – Biodegradation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
McAuliffe, D. (1983). Interaction of ethofumesate with dry soil. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/41416
Chicago Manual of Style (16th Edition):
McAuliffe, David. “Interaction of ethofumesate with dry soil.” 1983. Doctoral Dissertation, Oregon State University. Accessed March 02, 2021.
http://hdl.handle.net/1957/41416.
MLA Handbook (7th Edition):
McAuliffe, David. “Interaction of ethofumesate with dry soil.” 1983. Web. 02 Mar 2021.
Vancouver:
McAuliffe D. Interaction of ethofumesate with dry soil. [Internet] [Doctoral dissertation]. Oregon State University; 1983. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1957/41416.
Council of Science Editors:
McAuliffe D. Interaction of ethofumesate with dry soil. [Doctoral Dissertation]. Oregon State University; 1983. Available from: http://hdl.handle.net/1957/41416
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