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Mississippi State University
1.
LIU, Fangzhu.
Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil.
Degree: MS, Chemical Engineering, 2002, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-12032002-152100/ 
;
► 2,4,6-trinitrotoluene (TNT) is of environmental concern because it?s a possible human carcinogen and it also remains potentially explosive. The Department of the Army (DA) estimates…
(more)
▼ 2,4,6-trinitrotoluene (
TNT) is of environmental concern because it?s a possible human carcinogen and it also remains potentially explosive. The Department of the Army (DA) estimates that there are 540,000 cubic meters (700,000 cubic yards) of explosives-contaminated soil at over 2,000 sites that require remediation. Biological treatment of
TNT results in the production of the reduced intermediates (such as aminonitrotoluenes). When using chemical oxidation processes to treat
TNT, 1,3,5-trinitrobenzene (TNB) is produced. The by-products of both biological and oxidation treatment processes are resistant to further treatment thus they require extensive treatment times. This study evaluated the use of biotic mechanisms that can be used to reduce
TNT into aminodinitrotoluenes, which then are oxidized using Fenton?s Reagent oxidation process. Integration experimental results showed that Fenton?s Reagent was capable of degrading
TNT, though not as fast as ADNTs. The optimal Fe2+/H2O2 ratio appears to be less than 10:1. The
TNT biodegradation rate was higher than the
TNT oxidation rate and was biodegraded at a faster rate compared to the ADNTs. It was concluded that the integrated technology showed promise as an effective and innovative technology for treating
TNT contaminated soil.
Advisors/Committee Members: Mark E. Zappi (chair), R. Mark Bricka (committee member), Chiang H. Kuo (committee member), W. Todd French (committee member).
Subjects/Keywords: TNT
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APA (6th Edition):
LIU, F. (2002). Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-12032002-152100/ ;
Chicago Manual of Style (16th Edition):
LIU, Fangzhu. “Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil.” 2002. Masters Thesis, Mississippi State University. Accessed April 20, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-12032002-152100/ ;.
MLA Handbook (7th Edition):
LIU, Fangzhu. “Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil.” 2002. Web. 20 Apr 2021.
Vancouver:
LIU F. Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil. [Internet] [Masters thesis]. Mississippi State University; 2002. [cited 2021 Apr 20].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-12032002-152100/ ;.
Council of Science Editors:
LIU F. Integration of Chemical Oxidation and Biotreatment for Removal of TNT from Explosives Contaminated Soil. [Masters Thesis]. Mississippi State University; 2002. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-12032002-152100/ ;
Brno University of Technology
2.
Číhalová, Martina.
Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/10733
Literature overview of aerobic biotransformation pathways of polynitro aromates and methods of detection and analytical determination their transformation intermediates.
Advisors/Committee Members: Friedl, Zdeněk (advisor), Bednařík, Karel (referee).Subjects/Keywords: TNT; biotransformace; biodegradace; TNT; biotransformation; biodegradation
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APA (6th Edition):
Číhalová, M. (2019). Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/10733
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):
Číhalová, Martina. “Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds.” 2019. Thesis, Brno University of Technology. Accessed April 20, 2021.
http://hdl.handle.net/11012/10733.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Číhalová, Martina. “Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds.” 2019. Web. 20 Apr 2021.
Vancouver:
Číhalová M. Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/11012/10733.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Číhalová M. Biotransformace aromatických nitrolátek: Biotransformation of aromatic nitro compounds. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/10733
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
3.
Fahrenfeld, Nicole Leah.
Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.
Degree: PhD, Civil Engineering, 2012, Virginia Tech
URL: http://hdl.handle.net/10919/37811
► The nitroaromatic explosive 2,4,6-trinitrotoluene is a widespread, toxic groundwater contaminant. The objective of this work was to describe TNT fate in contaminated aquifer sediments. A…
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▼ The nitroaromatic explosive 2,4,6-trinitrotoluene is a widespread, toxic groundwater contaminant. The objective of this work was to describe
TNT fate in contaminated aquifer sediments. A series of bench scale experiments and model simulations were performed to evaluate the fate of
TNT in historically contaminated aquifer sediments. A
TNT contaminated site on the National Priorities List, Former Nansemond Ordnance Depot (FNOD), Suffolk, VA, served as the model site for this work. To describe desorption rate in contaminated sediments, two approaches for a first order single-site desorption were evaluated. In Model 1, the driving force for desorption is mathematically related to the sorbed phase concentrations, whereas in Model 2 the rate is based on aqueous phase concentrations. Two data sets were used to evaluate the models: (1) batch draw-and-fill experiments using FNOD sediment and (2) results from a previously published report from the Louisiana Army Ammunition Plant. Both models provided adequate fit, but Model 2 was better behaved and first order parameters fell within a smaller confidence interval. Draw-and-fill experiments were observed to yield first-order mass transfer coefficients well aligned with those derived from column experiments.
The effect of organic amendments on anaerobic
TNT degradation rate and microbial community structure in culture enriched from the FNOD site was studied in batch anaerobic microcosms.
TNT readily degraded under all experimental conditions. A reductive pathway of
TNT degradation was observed across all conditions, however, denaturing gradient gel electrophoresis (DGGE) analysis revealed distinct bacterial community compositions. In all microcosms, Gram-negative γ- or β-Proteobacteria and Gram-positive Negativicutes or Clostridia were observed. According to non-metric multidimensional scaling analysis of DGGE profiles, the microcosm communities were most similar to field site sediment corresponding to the highest
TNT concentration, relative to moderately and uncontaminated sediments, suggesting that
TNT contamination itself is a major driver of microbial community structure. Candidate degraders were identified and a Pseudomonas sp. was observed to be stimulated under all conditions, which was confirmed to rapidly degrade
TNT in pure culture.
Mathematical modeling of the batch microcosm results revealed that
TNT degraded 1.7 times faster in lactate amended microcosms than in ethanol amended microcosms, which degraded 3.0 times faster than natural organic matter amended microcosms. Simulation of the
TNT degradation pathway included determination of branching coefficients representing whether the first reduction of nitro group occurred in the ortho or para position or whether
TNT was removed from the aqueous phase (i.e. bound to dissolved organic matter). Branching coefficients were greater for initial reduction of para (17-27% initial
TNT concentration) over ortho (3-9% initial
TNT concentration) for all test conditions. However, a greater degradate recovery and a different…
Advisors/Committee Members: Schreiber, Madeline E. (committee member), Vikesland, Peter J. (committee member), Widdowson, Mark A. (committeecochair), Pruden, Amy (committeecochair).
Subjects/Keywords: sorption; bioremediation; TNT
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APA (6th Edition):
Fahrenfeld, N. L. (2012). Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/37811
Chicago Manual of Style (16th Edition):
Fahrenfeld, Nicole Leah. “Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.” 2012. Doctoral Dissertation, Virginia Tech. Accessed April 20, 2021.
http://hdl.handle.net/10919/37811.
MLA Handbook (7th Edition):
Fahrenfeld, Nicole Leah. “Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.” 2012. Web. 20 Apr 2021.
Vancouver:
Fahrenfeld NL. Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/10919/37811.
Council of Science Editors:
Fahrenfeld NL. Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/37811
Vanderbilt University
4.
Daniel, Aaron William.
Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation.
Degree: PhD, Chemistry, 2018, Vanderbilt University
URL: http://hdl.handle.net/1803/13281
► Vanadium dioxide (VO2) is a unique transition metal oxide that undergoes a first-order phase transition at 68°C from a semiconducting monoclinic phase (M) to a…
(more)
▼ Vanadium dioxide (VO2) is a unique transition metal oxide that undergoes a first-order phase transition at 68°C from a semiconducting monoclinic phase (M) to a metallic rutile phase (R). This has made VO2 of great interest in the field of condensed matter physics, but its potential applications as a chemical sensor or catalyst have been relatively ignored. VO2(M) nanoparticles were hydrothermally synthesized on a gram scale without the need for additional treatments as with other known synthesis methods. Particle films were analyzed via four-point resistivity to determine the collective phase transition behavior. Glassy carbon electrodes were modified with VO2 particles and used to detect 2,4,6-trinitrotoluene (
TNT) in solution with a limit of detection of 5 parts per billion. VO2 particles were also incorporated into carbon paste electrodes and used to reduce CO2 in a solution of sodium bicarbonate. Inclusion of VO2 shifted the onset of CO2 reduction 200 mV more positive than carbon paste alone.
Advisors/Committee Members: Richard F. Haglund, Jr. (committee member), David W. Wright (committee member), Timothy P. Hanusa (committee member), David E. Cliffel (Committee Chair).
Subjects/Keywords: Chemistry; TNT; Phase Transition; Electrochemistry
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APA (6th Edition):
Daniel, A. W. (2018). Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13281
Chicago Manual of Style (16th Edition):
Daniel, Aaron William. “Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation.” 2018. Doctoral Dissertation, Vanderbilt University. Accessed April 20, 2021.
http://hdl.handle.net/1803/13281.
MLA Handbook (7th Edition):
Daniel, Aaron William. “Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation.” 2018. Web. 20 Apr 2021.
Vancouver:
Daniel AW. Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation. [Internet] [Doctoral dissertation]. Vanderbilt University; 2018. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/1803/13281.
Council of Science Editors:
Daniel AW. Hydrothermal Synthesis of Phase-Changing Vanadium Dioxide Nanoparticles and Their Use in Environmental Remediation. [Doctoral Dissertation]. Vanderbilt University; 2018. Available from: http://hdl.handle.net/1803/13281
Oregon State University
5.
De Lorme, Marthah J. M.
Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms.
Degree: PhD, Microbiology, 2008, Oregon State University
URL: http://hdl.handle.net/1957/8655
► 2,4,6-Trinitrotoluene (TNT) has been the common munitions used in the world and is an environmental contaminant that is amendable to reductive transformation reactions. The rumen…
(more)
▼ 2,4,6-Trinitrotoluene (
TNT) has been the common munitions used in the world and is an environmental contaminant that is amendable to reductive transformation reactions. The rumen is an extremely reductive environment containing diverse microbial populations. There are 21 pure culture ruminal bacteria species in culture collection, these were tested for the ability to degrade
TNT. Of the 21 bacterial strains tested, 12 showed > 90% degradation of
TNT, 5 strains showed 80-90% degradation, 3 strains only had low
TNT degrading ability and one organism was completely inhibited by
TNT concentrations of 100 mg/l. Of the 12 strains able to transform >90% of the
TNT, 7 showed evidence of degradation of aminodinitrotoluene (ADNTs) and were subsequently tested for the ability to degrade ADNTs and diaminonitrotoluene (DANTs). Four were able to completely transform all these compounds, one was able to degrade all but 2,4-diaminonitrotoluene and the remaining two were able to degrade the ADNTs but were unable to transform the DANTs at a concentration of 50 mg/l. Degradation constants ranged from 0.31-11.39 h⁻¹ and the Michaelis-Menten constant ranged from 20-739 mg/l. Inhibition was detected for two of the organisms tested at levels of
TNT higher than 50 mg/l. In order to determine the effect of
TNT on rumen bacterial populations, rumen fluid was collected from three sheep before and after feeding
TNT at a dose of 35.5 mg/day and compared to a control animal. Clone libraries were constructed for each rumen fluid sample and compared for changes in microbial populations. Several clones from the pre-
TNT clustered with clones from the end of the experiment. The diversity and richness indices reveal that the number of clones sequenced were not enough to completely describe the populations found in the rumen. A limited number of shifts in populations between the pre- and post-treatment were detected within animals. However, there was no pattern in population fluxes detected in relationship to
TNT treatment. These results indicate that a broad range of ruminal bacteria can degrade
TNT and that feeding
TNT at levels found in plant material to sheep does not affect the bacterial populations.
Advisors/Committee Members: Craig, A Morrie (advisor), Stone, Jeffrey (committee member).
Subjects/Keywords: Rumen; TNT (Chemical) – Biodegradation
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APA (6th Edition):
De Lorme, M. J. M. (2008). Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/8655
Chicago Manual of Style (16th Edition):
De Lorme, Marthah J M. “Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms.” 2008. Doctoral Dissertation, Oregon State University. Accessed April 20, 2021.
http://hdl.handle.net/1957/8655.
MLA Handbook (7th Edition):
De Lorme, Marthah J M. “Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms.” 2008. Web. 20 Apr 2021.
Vancouver:
De Lorme MJM. Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms. [Internet] [Doctoral dissertation]. Oregon State University; 2008. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/1957/8655.
Council of Science Editors:
De Lorme MJM. Biotransformation of 2,4,6-trinitrotoluene by ruminal organisms. [Doctoral Dissertation]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/8655
University of New Orleans
6.
Jarand, Curtis William.
Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions.
Degree: PhD, Chemistry, 2011, University of New Orleans
URL: https://scholarworks.uno.edu/td/1319
► Nitroaromatic explosives, such as trinitrotoluene (TNT), are of particular environmental concern due to their recalcitrance in soils and their potent toxicity and mutagenicity to both…
(more)
▼ Nitroaromatic explosives, such as trinitrotoluene (
TNT), are of particular environmental concern due to their recalcitrance in soils and their potent toxicity and mutagenicity to both aquatic and mammalian species.
TNT was the most widely used military explosive through the era encompassing both the First and Second World Wars. As a result, there is widespread contamination of soils by
TNT around weapons manufacture, testing, and disposal facilities. Fenton chemistry (ferrous ion catalyzed generation of hydroxyl radicals) has shown utility in the remediation of
TNT in soils but it suffers from non-specificity and the need for acidic conditions to prevent loss of iron as iron hydroxides. Cyclodextrins (CDs) have demonstrated the ability to increase the efficiency of Fenton degradation of aromatic pollutant species. The increase in degradation efficiency observed in the CD Fenton reaction systems has been credited to the formation of a pollutant/CD/ferrous ion ternary complex which has the ability to produce hydroxyl radicals at the site of bound ferrous ions during Fenton reactions. This results in an increase in hydroxyl radical concentration near the target guest molecule relative to the bulk solution, leading to a targeted degradation of the complexed guest molecule. In order to assess the viability of CD assisted Fenton reactions for the remediation of
TNT, a thorough knowledge of the kinetics, degradation products, and role of binary and ternary complexes is required. Research presented in this dissertation examined the role of CDs in the Fenton oxidation of
TNT, specifically: 1) the kinetics of
TNT degradation in the presence of CDs for a Fenton reaction system, 2) the products of these reactions through chromatographic and mass spectrometric methods, and 3) NMR and binding studies of binary and ternary complexes.
Advisors/Committee Members: Tarr, Matthew, Cole, Richard, Cai, Yang.
Subjects/Keywords: TNT; Nitroaromatic; Cyclodextrin; Fenton; Remediation
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APA (6th Edition):
Jarand, C. W. (2011). Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions. (Doctoral Dissertation). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/1319
Chicago Manual of Style (16th Edition):
Jarand, Curtis William. “Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions.” 2011. Doctoral Dissertation, University of New Orleans. Accessed April 20, 2021.
https://scholarworks.uno.edu/td/1319.
MLA Handbook (7th Edition):
Jarand, Curtis William. “Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions.” 2011. Web. 20 Apr 2021.
Vancouver:
Jarand CW. Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions. [Internet] [Doctoral dissertation]. University of New Orleans; 2011. [cited 2021 Apr 20].
Available from: https://scholarworks.uno.edu/td/1319.
Council of Science Editors:
Jarand CW. Complexation of Organic Guests and Coordination of Metal Ions by Cyclodextrins: Role of Cyclodextrins in Metal-Guest Interactions. [Doctoral Dissertation]. University of New Orleans; 2011. Available from: https://scholarworks.uno.edu/td/1319
7.
ARAUJO, B. C.
Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae).
Degree: 2014, Universidade Federal do Espírito Santo; Doutorado em Biologia Animal; Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal); UFES; BR
URL: http://repositorio.ufes.br/handle/10/4370
► Made available in DSpace on 2016-08-29T15:33:50Z (GMT). No. of bitstreams: 1 tese_7769_Bruno Cancian de Araujo.pdf: 14411584 bytes, checksum: b064981d037df6effd664835b257b5d9 (MD5) Previous issue date: 2014-05-30
A…
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▼ Made available in DSpace on 2016-08-29T15:33:50Z (GMT). No. of bitstreams: 1 tese_7769_Bruno Cancian de Araujo.pdf: 14411584 bytes, checksum: b064981d037df6effd664835b257b5d9 (MD5) Previous issue date: 2014-05-30
A primeira análise cladística supraespecífica de Hybothoracini é apresentada. São testados 21 gêneros e 92 UTOs. Com base em 91 caracteres morfológicos, foram realizadas 11 análises de parcimônia, sendo uma com pesagem igual e 10 com pesagem implícita para valores de k entre 1 e 300. As análises de pesagem igual resultaram em quatro árvores igualmente parcimoniosas sob as quais foi gerada uma árvore de consenso estrito. As 10 análises de pesagem implícita geraram uma árvore cada, com basicamente três topologias distintas, para k variando entre 1 e 10, entre 16 e 50, e entre 100 e 300. Hybothoracini é monofilético em todas as análises e inclui Tropimeris e Zavoya como proposto por Wijesekara (1997). Os seguintes gêneros são mantidos:
Hastius Schmitz, Hybothorax Ratzeburg, Irichohalticella, Cameron, Lasiochalcidia Masi, Nearretocera Girault, Nipponochalcidia Habu, Notaspidiella Bouček, Notaspidium Dalla Torre, Proconura Dodd, Psilochalcis Kieffer, Schwarzella Ashmead, Solenochalcidia Steffan, Steninvreia Bouček, Xenarretocera Girault, Tropimeris Steffan. São propostas nove sinonímias genéricas, a citar: Hayatiella Narendran, sin. nov. e Neohybothorax Nikol'skaya, sin. nov. sob Hybothorax Ratzeburg; Bucekia Steffan, sin. nov. e Indoinvreia Roy & Farooqi, sin. nov. sob Lasiochalcidia Masi; Halsteadium Bouček, sin. nov. sob Notaspidium Dalla Torre; Cephalochalcidia Nikolskaya, sin. nov., Euchalcidiella Masi, sin. nov., Hyperchalcidia Steffan, sin. nov., Peltochalcidia Steffan, sin. nov. sob Xenarretocera Girault. São propostas 32 combinações novas e uma revalidação de combinação, a citar: Hybothorax aligarhensis (Narendran, 1989), comb. nov., Hybothorax hetera Walker, 1834, comb. nov.,
Hybothorax imitator (Nikol'skaya, 1960) comb. nov., Lasiochalcidia bouceki (Nikol'skaya, 1960) comb. nov., Lasiochalcidia differens Bouček, 1949, comb. rev., Lasiochalcidia dissimilis (Nikol'skaya, 1960) comb. nov., Psilochalcis erythropus (Cameron, 1897) comb. nov., Lasiochalcidia turkomana (Nikol'skaya, 1960) comb. 9 nov., Lasiochalcidia carinigena (Cameron, 1907) comb. nov., Lasiochalcidia zdenekia (Roy & Farooqi, 1984) comb. nov., Notaspidium alterum (Bouček, 1992) comb. nov., Notaspidium petiolatum (Bouček, 1992) comb. nov., Proconura menoni (Roy & Farooqi, 1984) comb. nov., Psilochalcis merita (Nikol'skaya, 1960) comb. nov., Xenarretocera capitata (Nikol'skaya, 1960) comb. nov., Xenarretocera levis (Nikol'skaya, 1960) comb. nov., Xenarretocera bardiensis (Masi, 1929b) comb. nov., Xenarretocera benoisti (Steffan, 1948) comb. nov., Xenarretocera capensis (Steffan, 1948) comb. nov., Xenarretocera clypeata (Bouček, 1952) comb. nov.,
Xenarretocera frontalis (Askew, 1994) comb. nov., Xenarretocera nigerrima (Masi, 1929c) comb. nov., Xenarretocera nitens (Steffan, 1948) comb. nov.,…
Advisors/Committee Members: KAWADA, R., FEITOSA, R. S. M., NOLL, F. B., LEITE, Y. L. R., TAVARES, M. T..
Subjects/Keywords: Haltichellinae; Chalcidoidea; TNT; pesagem implícita
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APA (6th Edition):
ARAUJO, B. C. (2014). Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae). (Doctoral Dissertation). Universidade Federal do Espírito Santo; Doutorado em Biologia Animal; Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal); UFES; BR. Retrieved from http://repositorio.ufes.br/handle/10/4370
Chicago Manual of Style (16th Edition):
ARAUJO, B C. “Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae).” 2014. Doctoral Dissertation, Universidade Federal do Espírito Santo; Doutorado em Biologia Animal; Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal); UFES; BR. Accessed April 20, 2021.
http://repositorio.ufes.br/handle/10/4370.
MLA Handbook (7th Edition):
ARAUJO, B C. “Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae).” 2014. Web. 20 Apr 2021.
Vancouver:
ARAUJO BC. Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae). [Internet] [Doctoral dissertation]. Universidade Federal do Espírito Santo; Doutorado em Biologia Animal; Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal); UFES; BR; 2014. [cited 2021 Apr 20].
Available from: http://repositorio.ufes.br/handle/10/4370.
Council of Science Editors:
ARAUJO BC. Estudo das relações filogenéticas supraespecíficas de Hybothoracini Boucek (Hymenoptera, Chalcididae, Haltichellinae). [Doctoral Dissertation]. Universidade Federal do Espírito Santo; Doutorado em Biologia Animal; Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal); UFES; BR; 2014. Available from: http://repositorio.ufes.br/handle/10/4370
Oregon State University
8.
Cruz-Uribe, Octavio T.
The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT).
Degree: PhD, Chemical Engineering, 2007, Oregon State University
URL: http://hdl.handle.net/1957/7614
► The capability of the marine red macroalga Portieria hornemannii to remove and detoxify the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT) in a seawater environment was evaluated using…
(more)
▼ The capability of the marine red macroalga Portieria hornemannii to remove and detoxify the nitroaromatic explosive 2,4,6-trinitrotoluene (
TNT) in a seawater environment was evaluated using an axenic microplantlet suspension culture system. Microplantlets were challenged with
TNT dissolved in seawater at concentrations of 1 to 50 mg L-1 in well-mixed photobioreactors under both batch and continuous additions. Photosynthetic activity was monitored by chlorophyll a fluorescence and oxygen evolution rate (OER) to determine the effects of
TNT on the microplantlet photosynthetic viability.
Microplantlets in 1.1 gFW L-1 suspension effectively removed 100% of
TNT from seawater medium at concentrations under 10 mg L-1 within approximately 72 h of exposure. First-order rate constants for
TNT uptake were 0.025 to 0.037 L g FW-1 h-1 under both illuminated and dark conditions. Biotransformation products of
TNT, 2-ADNT and 4-ADNT, were identified as the immediate transformation products. However, these products only accounted for 29% of initial
TNT. A mass balance of 14C-labeled
TNT in radioisotope tracer studies however, indicated that over 60% of 14C-label taken up by microplantlets was released back into the liquid medium, primarily in the form of polar and ionic metabolites. Polar metabolites were responsible for a change in liquid medium to a yellow color. These metabolites were tentatively identified by mass spectrometry to be Meisenheimer
TNT complex (H-
TNT) and tetranitro-hydrazotoluene (TN-HydrazoT) dimerization products. In contrast, only 26% of the 14C-label, primarily as solvent-extactable compounds, accumulated within the biomass tissue. Futhermore, bound residues of
TNT metabolites accounted for less than 5% of initial
TNT added.
Exposure to
TNT inhibited photosynthetic activity in microplantlets by a rapid reversible mechanism. The extent of inihibition was dependent on
TNT concentration, with higher concentrations causing permanent damage to the photosynthetic apparatus. A flow-recirulation bioreactor was developed to monitor real-time oxygen OER of microplantlets exposed to pulse and continuous additions of
TNT. Pulse additions of
TNT caused a rapid decrease in oxygen evolution by microplantlets, with the recovery of OER following
TNT uptake dependent on the intial concentration. Microplantlets were able to continuously take up and transform
TNT during 20 d perfusion additions of 0.35 and 2.5 mg
TNT d-1, even though at the higher concentration photosynthesis was significantly suppressed.
Advisors/Committee Members: Rorrer, Gregory (advisor), Mcguire, Joseph (committee member).
Subjects/Keywords: TNT; TNT (Chemical) – Biodegradation
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APA (6th Edition):
Cruz-Uribe, O. T. (2007). The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT). (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/7614
Chicago Manual of Style (16th Edition):
Cruz-Uribe, Octavio T. “The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT).” 2007. Doctoral Dissertation, Oregon State University. Accessed April 20, 2021.
http://hdl.handle.net/1957/7614.
MLA Handbook (7th Edition):
Cruz-Uribe, Octavio T. “The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT).” 2007. Web. 20 Apr 2021.
Vancouver:
Cruz-Uribe OT. The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT). [Internet] [Doctoral dissertation]. Oregon State University; 2007. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/1957/7614.
Council of Science Editors:
Cruz-Uribe OT. The uptake, transformation, and physiological response of the marine red macroalga Portieria hornemannii to the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT). [Doctoral Dissertation]. Oregon State University; 2007. Available from: http://hdl.handle.net/1957/7614
RMIT University
9.
Georgie, N.
Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes.
Degree: 2011, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:160048
► Â The nitroaromatic compound 2, 4, 6-trinitrotoluene (TNT) and the nitrate esters glycerol trinitrate (GTN) and pentaerythritol tetranitrate (PETN) are high explosives that have been produced…
(more)
▼  The nitroaromatic compound 2, 4, 6-trinitrotoluene (TNT) and the nitrate esters glycerol trinitrate (GTN) and pentaerythritol tetranitrate (PETN) are high explosives that have been produced on a massive scale for use in industrial and military applications. Through many years of production and use of these explosives, large quantities of toxic wastes have been generated, which has resulted in extensive contamination of soil and groundwater. These organic nitrate contaminants are highly recalcitrant and not normally found in the environment, thus classifying these compounds as xenobiotics. During this study, 36 bacterial species were isolated from contaminated soil and water that were able to utilize either TNT or PETN as a sole source of nitrogen. These were identified as Arthrobacter sp. (Pa-3, Pb-5, ST12, ST13, ST14, ST17, ST23, ST26), Pseudomonas sp. (ST1, ST2, ST15, ST18, ST19,ST22), Enterobacter sp. (ST3, ST5, ST6, ST8 , ST11), Klebsiella sp. (ST4, ST10, ST16, ST20, ST21, ST28, ST29), Microbacterium sp. (ST7, Pa-4, Pb-6,ST9, ST24, ST25 ST27,ST30), and Achromobacter xylosoxidans (TNT1, TNT2). Six representative isolates were selected from the 36 isolates for further analysis of growth and enzyme activity. The isolates were found to catalyse the NAD(P)H- dependent reductive cleavage/breakdown of GTN and PETN in a manner that was similar to a class of previously described oxidoreuctase flavoproteins. These include Old Yellow Enzyme (OYE), PETN reductase, GTN reductase, xenobiotic reductases A and B and N-ethyl maleimide reductas. This is the first report of nitroaromatic degradation by Achromobacter xylosoxidans as per the author’s knowledge. The aim of this study was to isolate bacteria able to degrade TNT and PETN and to characterize these bacteria and the enzymes produced by them. Thirty-six bacteria were isolated from contaminated soil and water that were able to utilize either TNT or PETN as a sole source of nitrogen. Identification was based on 16S rRNA gene sequences and biochemical testing. Studies investigating co-metabolism of the explosives in the presence of Tween-80 was performed. Triton X-100 was also evaluated as co-metabolic substrate. It was demonstrated that the addition of Tween- 80 as a co-substrate assisted in the co-metabolism of explosives and did improve the growth and therefore the degradation of the explosive. However, Triton X-100 did not result in co-metabolism of the explosives since an improvement in growth was not observed. The information acquired in this study can assist in the further characterization, optimization and production of explosive-degrading enzymes.
Subjects/Keywords: Fields of Research; TNT; PETN; Pentolite; Bioremediation
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APA (6th Edition):
Georgie, N. (2011). Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160048
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):
Georgie, N. “Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes.” 2011. Thesis, RMIT University. Accessed April 20, 2021.
http://researchbank.rmit.edu.au/view/rmit:160048.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Georgie, N. “Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes.” 2011. Web. 20 Apr 2021.
Vancouver:
Georgie N. Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes. [Internet] [Thesis]. RMIT University; 2011. [cited 2021 Apr 20].
Available from: http://researchbank.rmit.edu.au/view/rmit:160048.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Georgie N. Biodegradation of 2, 4, 6-Trinitrotoulene (TNT), Pentaerythritol Tetranitrate (PETN) & Pentolite by environmental microbes. [Thesis]. RMIT University; 2011. Available from: http://researchbank.rmit.edu.au/view/rmit:160048
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
10.
Nail, Jason Daniel.
Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/25586
► A bulk reductant (dithionite) was evaluated for its effectiveness to degrade TNT and associated nitroaromatic compounds in soils collected from the Longhorn Army Ammunition Plant.…
(more)
▼ A bulk reductant (dithionite) was evaluated for its effectiveness to degrade TNT and associated nitroaromatic compounds in soils collected from the Longhorn Army Ammunition Plant. Optimum conditions for degradation of the target
nitroaromatics by dithionite were investigated in batch tests and packed infiltration column tests. An increase in pH via application of a pH buffer prior to reagent addition led to increased rates of nitroaromatic transformation and a greater overall
percentage of contaminant degraded. Mineralogical changes during chemical reduction were monitored through the use of X-ray diffraction techniques. Although further studies are recommended to clearly understand the abiotic degradation products of
nitroaromatics using bulk reductants, the data obtained from this study provides evidence of the potential effectiveness of dithionite to treat nitroaromatics and other oxidized organic compounds in soil.
Subjects/Keywords: 2; 4; 6-Trinitrotoluene; dithionite; nitroaromatics; TNT; ADNT
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APA (6th Edition):
Nail, J. D. (2014). Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/25586
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):
Nail, Jason Daniel. “Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant.” 2014. Thesis, University of Georgia. Accessed April 20, 2021.
http://hdl.handle.net/10724/25586.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nail, Jason Daniel. “Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant.” 2014. Web. 20 Apr 2021.
Vancouver:
Nail JD. Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/10724/25586.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nail JD. Dithionite mediated degradation of 2,4,6-trinitrotoluene in soils from a former Department of Defense ammunition plant. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/25586
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
11.
Gupta, Ankit.
Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants.
Degree: MS, Environmental Planning, 2011, Virginia Tech
URL: http://hdl.handle.net/10919/45045
► Groundwater contaminants such as chlorinated ethenes, chlorinated ethanes and nitroaromatic explosive compounds (e.g. 2,4,6-Trinitrotoluene (TNT)) degrade in the subsurface primarily by microbially catalyzed reductive transformation…
(more)
▼ Groundwater contaminants such as chlorinated ethenes, chlorinated ethanes and nitroaromatic explosive compounds (e.g. 2,4,6-Trinitrotoluene (
TNT)) degrade in the subsurface primarily by microbially catalyzed reductive transformation reactions. From a regulatory point of view, the capability to simulate the kinetics of these reductive transformation reactions coupled with other attenuation processes in the subsurface (e.g., sorption, advection, and dispersion) is required for site-specific solute transport models. A kinetic model based on Michaelis-Menten type equations (Widdowson 2004) has been successfully validated for the linear reductive dechlorination pathway of chlorinated ethenes, and implemented in solute transport codes such as SEAM3D (Waddill and Widdowson 2000). However,
TNT degrades through more complex branched pathways, and kinetic models are lacking in the current literature.
This research study was undertaken with the objective of extending the kinetic model developed for the linear reductive pathway of chlorinated ethenes to branched pathways. The proposed extended kinetic model was validated with experimental concentration-time data of
TNT and its metabolites from two prior published laboratory studies (Daun et al. 2000; Hwang et al. 2000), both in the presence and absence of sorption. The model-predicted concentrations with time of
TNT and its degradation intermediates and end-products correlated well with the experimental data. The model is further compatible with and can be easily incorporated into solute transport codes (e.g., SEAM3D), and used to evaluate the fate and transport of
TNT and other similar contaminants in the subsurface.
Advisors/Committee Members: Widdowson, Mark A. (committeechair), Pruden, Amy (committee member), Schreiber, Madeline E. (committee member).
Subjects/Keywords: Sorption; TNT; Biodegradation; Branched Pathways; Reductive Transformation
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APA ·
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Export
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APA (6th Edition):
Gupta, A. (2011). Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/45045
Chicago Manual of Style (16th Edition):
Gupta, Ankit. “Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants.” 2011. Masters Thesis, Virginia Tech. Accessed April 20, 2021.
http://hdl.handle.net/10919/45045.
MLA Handbook (7th Edition):
Gupta, Ankit. “Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants.” 2011. Web. 20 Apr 2021.
Vancouver:
Gupta A. Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/10919/45045.
Council of Science Editors:
Gupta A. Mathematical Modeling of Reductive Transformation Kinetics of Branched Degradation Pathways of Groundwater Contaminants. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/45045
Brno University of Technology
12.
Tomeček, Jaromír.
Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/11604
► Contamination by nitroaromatic compounds, such as explosives, pesticides or other nitroaromatic compounds, is worldwide environmental problem. This text focuses on contamination by compounds from military…
(more)
▼ Contamination by nitroaromatic compounds, such as explosives, pesticides or other nitroaromatic compounds, is worldwide environmental problem. This text focuses on contamination by compounds from military and ammunition industry, most especially 2,4,6-trinitrotoluene (
TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX). First goal of this work is to provide the reader with a aerobic biodegradation and transformation processes of nitroaromatic compounds named above. The second goal is to compare the toxicity of initial nitroaromates and their transformation intermediates.
Advisors/Committee Members: Friedl, Zdeněk (advisor), Bednařík, Karel (referee).
Subjects/Keywords: polynitroaromáty; TNT; RDX; HMX; biodegradace; biotranformace; toxicita; polynitroaromates; TNT; RDX; HMX; biodegradation; biotransformation; toxicity
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APA (6th Edition):
Tomeček, J. (2018). Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/11604
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):
Tomeček, Jaromír. “Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates.” 2018. Thesis, Brno University of Technology. Accessed April 20, 2021.
http://hdl.handle.net/11012/11604.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tomeček, Jaromír. “Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates.” 2018. Web. 20 Apr 2021.
Vancouver:
Tomeček J. Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/11012/11604.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tomeček J. Biotransformace aromatických nitrolátek: Biotransformation of nitro aromates. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/11604
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Bem, Vanessa Rodrigues.
Síntese e fotosensibilização de nanotubos de titanatos.
Degree: 2011, Repositório Científico do Instituto Politécnico de Lisboa
URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/1123
► Nesta tese é descrita a preparação de nanotubos de titanatos (TNT) via síntese hidrotérmica alcalina, usando uma nova metodologia que evita a utilização de TiO2…
(more)
▼ Nesta tese é descrita a preparação de nanotubos de titanatos (TNT) via síntese hidrotérmica alcalina, usando uma nova metodologia que evita a utilização de TiO2 cristalino como precursor.
Foi estudada a influência da substituição sódio/protão na estrutura, morfologia e
propriedades ópticas dos materiais preparados. Os resultados mostraram que a substituição Na+ → H+ resulta numa redução na distância intercamadas dos TNTs, tendo sido medidos valores entre 1.13±0.03 nm e 0.70±0.02 nm para aquele parâmetro. O comportamento óptico dos TNTs foi estudado na região UV-vis, estimando-se um hiato óptico de energia 3.27±0.03 eV para a amostra com maior teor de sódio enquanto que para a amostra protonada foi determinado um valor de 2.81±0.02 eV. Estes valores mostram que a troca iónica Na+ → H+ teve influência no desvio da banda de absorção dos TNTs para a região do visível próximo. A actividade fotocatalítica dos TNTs na degradação do corante rodamina 6G (R6G) foi posteriormente estudada. Verificou-se que, apesar de a amostra com maior teor de sódio ter sido a que exibiu maior capacidade para adsorver o R6G, foi a amostra protonada que apresentou a actividade catalítica mais elevada na fotodegradação deste corante.
Numa segunda fase, e com o objectivo de preparar novos materiais nanoestruturados fotosensíveis, procedeu-se à decoração dos TNTs protonados com semicondutores (SC) nanocristalinos usando um método novo. Para o efeito os TNTs foram decorados com nanocristalites de ZnS, CdS e Bi2S3. Foi estudada a influência do tipo de semicondutor na estrutura, morfologia e propriedades ópticas dos SC/TNTs obtidos. Verificou-se que, para qualquer dos semicondutores usados no processo de decoração, a estrutura dos TNTs é preservada e não ocorre segregação do SC. Verificou-se ainda que a morfologia dos nanocompósitos
preparados depende fortemente da natureza do semicondutor. No que respeita ao comportamento óptico destes materiais, foram determinados hiatos ópticos de energia 3.67±0.03 eV, 2.47±0.03 eV e 1.35±0.01 eV para as amostras ZnS/TNT, CdS/TNT e Bi2S3/TNT, respectivamente.
Estes resultados mostram que através do processo de decoração de TNTs com semicondutores podem ser preparados materiais nanocompósitos inovadores, com
propriedades ópticas novas e/ou pré-definidas numa gama alargada do espectro electromagnético.
This thesis reports on the synthesis of titanate nanotubes (TNT) with different sodium contents using a new hydrothermal approach avoiding the use of crystalline TiO2as precursor material. The influence of the sodium/proton replacement on the structural and morphological characteristics of the prepared materials was studied. XRD and high resolution TEM analyses showed that the Na+→H+replacement leads to a shortening TNT interlayer distance. Values ranging from 1.13±0.03 nm to 0.70±0.02 nm were measured for that structural parameter. The UV-vis optical behaviour of the TNTs samples was studied. Depending on the samples’ Na+/H+content a different optical behaviour was observed. A band gap energy of 3.27±0.03 eV was…
Advisors/Committee Members: Silvestre, António Jorge, Monteiro, Olinda Coelho.
Subjects/Keywords: Nanotubos de titanatos; Troca iónica sódio/protão; Energia do hiato óptico; Fotocatálise; Nanocompósitos SC/TNT; Titanate nanotubes (TNT); Sodium/proton exchange; Band gap energy; Photocatalysis; SC/TNT nanocomposites
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APA (6th Edition):
Bem, V. R. (2011). Síntese e fotosensibilização de nanotubos de titanatos. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/1123
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):
Bem, Vanessa Rodrigues. “Síntese e fotosensibilização de nanotubos de titanatos.” 2011. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed April 20, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/1123.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bem, Vanessa Rodrigues. “Síntese e fotosensibilização de nanotubos de titanatos.” 2011. Web. 20 Apr 2021.
Vancouver:
Bem VR. Síntese e fotosensibilização de nanotubos de titanatos. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2011. [cited 2021 Apr 20].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/1123.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bem VR. Síntese e fotosensibilização de nanotubos de titanatos. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/1123
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Université de Lorraine
14.
Risse, Benedikt.
Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash.
Degree: Docteur es, Génie des Procédés et des Produits, 2012, Université de Lorraine
URL: http://www.theses.fr/2012LORR0144
► Sous l'effet d'une forte impulsion mécanique, d'une chaleur très forte ou d'une décharge électrostatique, un explosif comme le TNT ou le RDX peut accidentellement être…
(more)
▼ Sous l'effet d'une forte impulsion mécanique, d'une chaleur très forte ou d'une décharge électrostatique, un explosif comme le TNT ou le RDX peut accidentellement être initié. L'énergie apportée à l'explosif est convertie en chaleur, appelée point-chaud, dans des endroits spécifiques, contenant des impuretés, bulles de gaz, pores ouverts ou autres hétérogénéités. La taille d'un point-chaud de quelques micromètres peut être déjà suffisante pour initier une déflagration ou même une détonation. En réduisant la taille des particules de l'explosif, la formation des points-chauds est empêchée conduisant à un matériau moins sensible. Au sein de ce travail, un procédé continu est développé, fondé sur le principe de la cristallisation-flash, et permettant la préparation de particules énergétiques submicroniques en quantité de plusieurs grammes. Le procédé repose sur une opération de séchage par atomisation, au cours de laquelle une solution surchauffée est atomisée d'une manière continue. Afin de diminuer la taille moyenne des particules et d'obtenir une distribution de taille des particules très étroite, une étude paramétrique est réalisée. Au moyen de la cristallisation-flash, la préparation de composites énergétiques de haute qualité en grandes quantités est un succès. La qualité et quantité de ce composite énergétique sont uniques. Grâce au potentiel de ce procédé, la cristallisation-flash peut permettre la préparation de nombreuses substances et compositions énergétiques ou inertes
High explosives, such as TNT or RDX, may be accidentally initiated under the influence of a strong mechanical impulse, great heat or an electrostatic discharge. Smallest impurities, open pores, entrapped gases or other inhomogeneities within the explosive matrix may convert the delivered energy into heat, causing the formation of a so called hot-spot. A hot-spot size of a few micrometers can already be sufficient to initiate a deflagration or even a detonation of the explosive. By decreasing the particle size of the explosive, the formation of hot-spots is inhibited, resulting in a less sensitive material. In this work, a continuous operating flash-crystallization process was developed, being able to produce energetic submicron particles in a multigram scale. The process bases on a spray drying process where superheated solutions are continuously atomized. A parametric study was performed on this process in order to decrease the particle size and obtaining a narrower particle size distribution. By means of this flash-crystallization process, highly homogeneous energetic composites were prepared in a large scale. The quality and amount of the energetic composite are unique. The versatility of the flash-crystallization process allows the preparation of a large number of energetic and inert substances and compositions
Advisors/Committee Members: Muhr, Hervé (thesis director), Spitzer, Denis (thesis director).
Subjects/Keywords: Nanocristallisation; RDX; TNT; Cristallisation-flash; Procédé; Matériaux énergétiques; Nanocrystallization; RDX; TNT; Flash-Crystallization; Process; Energetic Materials; 662.2; 660.284 298
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APA (6th Edition):
Risse, B. (2012). Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2012LORR0144
Chicago Manual of Style (16th Edition):
Risse, Benedikt. “Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash.” 2012. Doctoral Dissertation, Université de Lorraine. Accessed April 20, 2021.
http://www.theses.fr/2012LORR0144.
MLA Handbook (7th Edition):
Risse, Benedikt. “Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash.” 2012. Web. 20 Apr 2021.
Vancouver:
Risse B. Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash. [Internet] [Doctoral dissertation]. Université de Lorraine; 2012. [cited 2021 Apr 20].
Available from: http://www.theses.fr/2012LORR0144.
Council of Science Editors:
Risse B. Continuous crystallization of ultra-fine energetic particles by the Flash-Evaporation Process : Cristallisation continue des particules énergétiques ultra-fines par Évaporation-Flash. [Doctoral Dissertation]. Université de Lorraine; 2012. Available from: http://www.theses.fr/2012LORR0144
Universiteit Utrecht
15.
Ruiter, R.C. de.
Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post.
Degree: 2010, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/205280
► Een kwalitatief onderzoek naar de betekenisgeving aan vrijwillige uitstroom bij TNT Post. Het volledige uitstroomproces wordt in kaart gebracht door middel van een exploratief content-…
(more)
▼ Een kwalitatief onderzoek naar de betekenisgeving aan vrijwillige uitstroom bij
TNT Post.
Het volledige uitstroomproces wordt in kaart gebracht door middel van een exploratief content- en procesonderzoek. Het contentonderzoek kent de acht factoren van Maertz (2001) als basis terwijl het procesonderzoek gebruik maakt van de beslissingsprocessen van Lee e.a. (1999). Er wordt bijzondere aandacht besteed aan de relatie tussen de content- en procesaspecten.
Op basis van de betekenisgeving van de postbode worden er aanbevelingen gedaan op het gebied van de communicatie van aankomende reorganisaties en het functioneren van
TNT Mobility, het HR instrument dat externe mobiliteit stimuleert.
Advisors/Committee Members: Berkel, R. van, Knies, E..
Subjects/Keywords: Externe mobiliteit; contentonderzoek; procesonderzoek; TNT Post; Vrijwillige uitstroom
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APA (6th Edition):
Ruiter, R. C. d. (2010). Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/205280
Chicago Manual of Style (16th Edition):
Ruiter, R C de. “Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post.” 2010. Masters Thesis, Universiteit Utrecht. Accessed April 20, 2021.
http://dspace.library.uu.nl:8080/handle/1874/205280.
MLA Handbook (7th Edition):
Ruiter, R C de. “Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post.” 2010. Web. 20 Apr 2021.
Vancouver:
Ruiter RCd. Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post. [Internet] [Masters thesis]. Universiteit Utrecht; 2010. [cited 2021 Apr 20].
Available from: http://dspace.library.uu.nl:8080/handle/1874/205280.
Council of Science Editors:
Ruiter RCd. Het is tijd voor een nieuwe post!
Een onderzoek naar de betekenisgeving aan vrijwillige uitstroom onder postbodes van TNT Post. [Masters Thesis]. Universiteit Utrecht; 2010. Available from: http://dspace.library.uu.nl:8080/handle/1874/205280
University of Michigan
16.
Landenberger, Kira Beth.
Cocrystallization of Energetic Materials.
Degree: PhD, Chemistry, 2013, University of Michigan
URL: http://hdl.handle.net/2027.42/98068
► Here cocrystallization, the formation of crystals containing two or more neutral molecular components in a defined ratio within a crystal lattice, is explored as a…
(more)
▼ Here cocrystallization, the formation of crystals containing two or more neutral molecular components in a defined ratio within a crystal lattice, is explored as a means to alter and improve the properties of energetic materials, including explosives, propellants and pyrotechnics. To develop cocrystal engineering principles for energetic materials, model cocrystal systems between energetic and non-energetic materials were studied. Series of cocrystals were formed with 2,4,6-trinitrotoluene (
TNT) and 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX) to investigate cocrystallization of aromatic and aliphatic energetic materials respectively. These model systems demonstrated the ability to cocrystallize energetic materials and provided insight on favorable interactions for the formations of these cocrystals.
TNT formed cocrystals exclusively with electron-rich aromatic compounds through donor acceptor pi-pi interactions, while HMX formed cocrystals with a wide variety of cocrystal formers primarily through electrostatic interactions. The structures of these cocrystals were dictated by the size, shape and electronic character of the cocrystal formers. Properties relevant to energetic materials were altered through cocrystallization including the melting point, decomposition temperature, density, oxygen balance and impact sensitivity. The principles developed from these two model energetic cocrystal systems led to the formation of novel energetic-energetic cocrystals between diacetone diperoxide (DADP) and a series of halogenated trinitrobenzenes: 1,3,5-trichloro-2,4,6-trinitrobenzene (TCTNB), 1,3,5-tribromo-2,4,6-trinitrobenzene (TBTNB) and 1,3,5-triiodo-2,4,6-trinitrobenzene (TITNB). Like the
TNT and HMX cocrystals, the DADP cocrystals showed altered materials properties. Unlike the previously discovered energetic cocrystals, impact sensitivity was not improved with respect to the most sensitive component, DADP, even after cocrystallization, suggesting that the peroxide moiety is inherently unstable. This result suggests that cocrystallization can be used as an experimental means to probe causes of sensitivity for energetic materials. Finally, the DADP/TBTNB cocrystal was discovered to be a kinetic cocrystal. The existence of a kinetic cocrystal is relevant for the development of cocrystallization because it highlights the need to ensure that potential kinetic cocrystals are not overlooked during the cocrystal screening process by employing methods that only favor thermodynamically stable forms.
Advisors/Committee Members: Matzger, Adam J. (committee member), Rodriguez-Hornedo, Nair (committee member), Banaszak Holl, Mark M. (committee member), McNeil, Anne Jennifer (committee member).
Subjects/Keywords: Energetic Cocrystal; Explosive; TNT; HMX; DADP; Energetic Co-crystal; Chemistry; Science
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APA (6th Edition):
Landenberger, K. B. (2013). Cocrystallization of Energetic Materials. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/98068
Chicago Manual of Style (16th Edition):
Landenberger, Kira Beth. “Cocrystallization of Energetic Materials.” 2013. Doctoral Dissertation, University of Michigan. Accessed April 20, 2021.
http://hdl.handle.net/2027.42/98068.
MLA Handbook (7th Edition):
Landenberger, Kira Beth. “Cocrystallization of Energetic Materials.” 2013. Web. 20 Apr 2021.
Vancouver:
Landenberger KB. Cocrystallization of Energetic Materials. [Internet] [Doctoral dissertation]. University of Michigan; 2013. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/2027.42/98068.
Council of Science Editors:
Landenberger KB. Cocrystallization of Energetic Materials. [Doctoral Dissertation]. University of Michigan; 2013. Available from: http://hdl.handle.net/2027.42/98068
Vanderbilt University
17.
Gulka, Christopher Peter.
Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers.
Degree: PhD, Chemistry, 2014, Vanderbilt University
URL: http://hdl.handle.net/1803/14626
► Gold’s resistance to oxidation and exhibition of unique chemical and physical properties enable the development of current sensor and diagnostic platforms. This dissertation elucidates novel…
(more)
▼ Gold’s resistance to oxidation and exhibition of unique chemical and physical properties enable the development of current sensor and diagnostic platforms. This dissertation elucidates novel sensor platforms for the rapid detection of explosives and malarial biomarkers, respectively, by exploiting the catalytic and chromogenic properties of nanoscale gold. Initially, bulk gold serves as a substrate to biomimetically recognize explosive small molecules with peptide ligands at the cost of sensitivity. To enhance detection, immobilized gold nanoparticles electrocatalytically facilitate explosive molecule detection in a size-dependent manner. Taking advantage of gold’s optical properties, a colorimetric proof-of-concept assay amenable to the developing world is presented by capturing a malarial protein biomarker, inducing a red-to-purple color change and overcoming many obstacles associated with low-resource diagnostics. To increase biomarker sensitivity, gold-plated polystyrene microspheres mimic the phenomenon elicited by coffee rings to capture and concentrate the protein, allowing for the rapid interpretation of results and providing a simple user interface.
Advisors/Committee Members: Richard Haglund (committee member), Timothy Hanusa (committee member), Darryl Bornhop (committee member), David Wright (Committee Chair).
Subjects/Keywords: coffee ring; malaria; HRP-II; TNT; gold nanoparticles
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APA (6th Edition):
Gulka, C. P. (2014). Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14626
Chicago Manual of Style (16th Edition):
Gulka, Christopher Peter. “Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed April 20, 2021.
http://hdl.handle.net/1803/14626.
MLA Handbook (7th Edition):
Gulka, Christopher Peter. “Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers.” 2014. Web. 20 Apr 2021.
Vancouver:
Gulka CP. Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/1803/14626.
Council of Science Editors:
Gulka CP. Gold as a Sensing Platform for the Rapid Detection of Explosives and Malarial Biomarkers. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/14626
Vanderbilt University
18.
Casey, Matthew Curtis.
Investigations of Vanadium Dioxide as a Catalytic Electrode and Support.
Degree: PhD, Chemistry, 2015, Vanderbilt University
URL: http://hdl.handle.net/1803/14656
► Vanadium dioxide (VO2) is a material that undergoes a phase transition at 68 °C which corresponds to interesting changes in its optical and electronic properties,…
(more)
▼ Vanadium dioxide (VO2) is a material that undergoes a phase transition at 68 °C which corresponds to interesting changes in its optical and electronic properties, including a decrease in resistivity of up to five orders of magnitude. While the physical properties of this material have long been studied, the ability of VO2 to detect various analytes has been largely ignored. This work utilizes films and particles of VO2 and related materials in the study of two analytes with potential real-world applicability, 2,4,6-trinitrotoluene (
TNT) and carbon monoxide. The electrochemical reduction of
TNT was investigated using films of vanadium dioxide. Three distinct reduction peaks were observed in the potential range of −0.50 to −0.90 V (vs Ag/AgCl), corresponding to the electrochemical reduction of the three nitro-groups on the
TNT molecule and demonstrating a linear response to
TNT concentration. Furthermore, the use of adsorptive stripping voltammetry allowed detection of
TNT as low as 1 μg/L (4.4 nM), which is comparable to the lowest concentrations of
TNT detection currently available in the literature.
Vanadium dioxide materials were further used as supports for the gold-catalyzed oxidation of carbon monoxide. Although other metal oxides such as titanium dioxide (TiO2) have been well documented in their ability to act as supports for this reaction at temperatures close to or at room temperature, VO2 has not yet been pursued as a possible support. This work demonstrates for the first time the ability of VO2 to act as a support for gold nanoparticle catalysts, using V2O4 and TiO2 as controls. The findings of this work reveal catalytic activity of these materials that does not directly correlate to gold nanoparticle size, despite what has been published previously. The basis for this discrepancy is still unclear and warrants further investigation. However, the results described in this work are the first describing the use of VO2 materials as gold nanoparticle supports for CO oxidation, and open further avenues of research using this unique material.
Advisors/Committee Members: Sandra J. Rosenthal, Ph.D. (committee member), Eva M. Harth, Ph.D. (committee member), Richard F. Haglund, Ph.D. (committee member), David E. Cliffel, Ph.D. (Committee Chair).
Subjects/Keywords: VO2; catalysis; vanadium oxide; TNT; metal oxide; gold nanoparticles
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APA (6th Edition):
Casey, M. C. (2015). Investigations of Vanadium Dioxide as a Catalytic Electrode and Support. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14656
Chicago Manual of Style (16th Edition):
Casey, Matthew Curtis. “Investigations of Vanadium Dioxide as a Catalytic Electrode and Support.” 2015. Doctoral Dissertation, Vanderbilt University. Accessed April 20, 2021.
http://hdl.handle.net/1803/14656.
MLA Handbook (7th Edition):
Casey, Matthew Curtis. “Investigations of Vanadium Dioxide as a Catalytic Electrode and Support.” 2015. Web. 20 Apr 2021.
Vancouver:
Casey MC. Investigations of Vanadium Dioxide as a Catalytic Electrode and Support. [Internet] [Doctoral dissertation]. Vanderbilt University; 2015. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/1803/14656.
Council of Science Editors:
Casey MC. Investigations of Vanadium Dioxide as a Catalytic Electrode and Support. [Doctoral Dissertation]. Vanderbilt University; 2015. Available from: http://hdl.handle.net/1803/14656
19.
Lindmark, Johan.
Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken.
Degree: Sustainable Development of Society and Technology, 2008, Mälardalen University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4480
► A bioslurry reactor was built for the bioremediation of TNT contaminated waste from the demilitarization industry. The field test was conducted at Vingåkersverken in…
(more)
▼ A bioslurry reactor was built for the bioremediation of TNT contaminated waste from the demilitarization industry. The field test was conducted at Vingåkersverken in Vingåker, Sweden, to see if results from laboratory studies could be repeated in a full scale reactor. The goal of the project was to optimize the reactor to such a degree that it could be used to handle the waste produced at Vingåkersverken and also that this technique could be applied for remediation of contaminated soils. Unfortunately the samples taken during the full scale field test were destroyed by the shipping company and no analysis was possible. A later attempt by the Biorex research group has also been unsuccessful to reduce the amount of TNT using the bioreactor. How are we going to reach the results from the laboratory studies? The work continues.
Subjects/Keywords: TNT; Bioreaktor; anaerob; slurry; BIOREX
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APA (6th Edition):
Lindmark, J. (2008). Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken. (Thesis). Mälardalen University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4480
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):
Lindmark, Johan. “Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken.” 2008. Thesis, Mälardalen University. Accessed April 20, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4480.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lindmark, Johan. “Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken.” 2008. Web. 20 Apr 2021.
Vancouver:
Lindmark J. Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken. [Internet] [Thesis]. Mälardalen University; 2008. [cited 2021 Apr 20].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4480.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lindmark J. Anaerob nedbrytning av TNT : Ett bioreaktorförsök på Vingåkersverken. [Thesis]. Mälardalen University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-4480
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New Orleans
20.
Wei, Bo.
Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems.
Degree: MS, Chemistry, 2003, University of New Orleans
URL: https://scholarworks.uno.edu/td/59
► Residues of 2,4,6-trinitrotoluene (TNT) in soil and groundwater near former production and processing plants generate large environmental concerns. A cyclodextrin (CD) mediated Fenton remediation of…
(more)
▼ Residues of 2,4,6-trinitrotoluene (
TNT) in soil and groundwater near former production and processing plants generate large environmental concerns. A cyclodextrin (CD) mediated Fenton remediation of
TNT contaminated water and sand (soil analogy) is presented. Kinetic studies were performed to elucidate the role of cyclodextrin in Fenton remediation of
TNT contaminated water. The rate and extent of
TNT degraded by Fe2+- CD-H2O2 systems were significantly enhanced as compared to the classic Fenton method. Further, in water system with interfering substance - humic acid, which tends to associate with
TNT, the addition of cyclodextrin helped to improve the efficiency of Fenton degradation. This technique has also been successfully applied to remediate
TNT contaminated soil systems (sand). Four systems were investigated: clean sand, sand and humic acid, sand and fulvic acid, sand and natural organic matter. This technique has shown superior performance than classic Fenton method in all of the four above systems.
Advisors/Committee Members: Tarr, Matthew, Wang, Guijun, Evilia, Ronald.
Subjects/Keywords: Remediation; Fenton reaction; TNT; Cyclodextrin
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APA (6th Edition):
Wei, B. (2003). Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems. (Thesis). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/59
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):
Wei, Bo. “Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems.” 2003. Thesis, University of New Orleans. Accessed April 20, 2021.
https://scholarworks.uno.edu/td/59.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wei, Bo. “Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems.” 2003. Web. 20 Apr 2021.
Vancouver:
Wei B. Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems. [Internet] [Thesis]. University of New Orleans; 2003. [cited 2021 Apr 20].
Available from: https://scholarworks.uno.edu/td/59.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wei B. Targeted Degradation of Trinitrotoluene Using Iron (II)-Cyclodextrin-Peroxide Systems. [Thesis]. University of New Orleans; 2003. Available from: https://scholarworks.uno.edu/td/59
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
21.
Shuler, Sarah Ruth.
Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/21982
► Historic handling of explosives has led to worldwide contamination of soils with 2,4,6-trinitrotoluene (TNT) and heavy metals as well. In this study, the combined effects…
(more)
▼ Historic handling of explosives has led to worldwide contamination of soils with 2,4,6-trinitrotoluene (TNT) and heavy metals as well. In this study, the combined effects of TNT and lead on soil microbial communities were analyzed. Theresa
and Appling soil samples were spiked with up to 365 mg kg-1 TNT, 25 mg kg-1 Pb, and a mixture of both compounds at similar concentrations and incubated for 15 d. Changes in microbial respiration, biomass, total and bioavailable TNT, bioavailable Pb, and
community composition with time were monitored. The presence of Pb did not affect TNT transformation at a concentration less than 365 mg kg-1. All treatments negatively affected biomass production in Appling soil, while Theresa biomass production
increased with increasing TNT concentration. Fatty acid methyl ester (FAME) analysis showed that 365 mg kg-1 TNT negatively affected bacteria and fungi in both soils. In Appling soil, 365 mg kg-1 TNT mixed with Pb favored an increase in bacteria while
fungi decreased. Mixes of 25 mg kg-1 Pb and 365 mg kg-1 TNT negatively affected bacterial and fungal abundance in Theresa soil. This study showed that different soil microbial communities respond differently to TNT and Pb contamination.
Subjects/Keywords: 2,4,6-trinitrotoluene (TNT); Lead; FAME; Contamination; Microbial community; Soil; Microbial biomass
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APA (6th Edition):
Shuler, S. R. (2014). Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/21982
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):
Shuler, Sarah Ruth. “Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil.” 2014. Thesis, University of Georgia. Accessed April 20, 2021.
http://hdl.handle.net/10724/21982.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shuler, Sarah Ruth. “Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil.” 2014. Web. 20 Apr 2021.
Vancouver:
Shuler SR. Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/10724/21982.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shuler SR. Microbial community response to 2,4,6-trinitrotoluene and lead mixtures in soil. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/21982
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
22.
Liu, Xiaoyang.
Generation of Heptagon-Containing Fullerene Structures by Computational Methods.
Degree: MS, Chemistry, 2016, Virginia Tech
URL: http://hdl.handle.net/10919/83480
► Since the discovery three decades ago, fullerenes as well as metallofullerenes have been extensively investigated. However, almost all known fullerenes follow the classical definition, that…
(more)
▼ Since the discovery three decades ago, fullerenes as well as metallofullerenes have been extensively investigated. However, almost all known fullerenes follow the classical definition, that is, classic fullerenes are comprised of only pentagons and hexagons. Nowadays, more and more evidence, from both theoretical and experimental studies, suggests that non-classical fullerenes, especially heptagon-containing fullerenes, are important as intermediates in fullerene formation mechanisms. To obtain fundamental understandings of fullerenes and their formation mechanisms, new systematic studies should be undertaken. Although necessary tools, such as isomer generating programs, have been developed for classical fullerenes, none of them are able to solve problems related to non-classical fullerenes. In this thesis, existing theories and algorithms of classical fullerenes are generalized to accommodate non-classical fullerenes. A new program based on these generalized principles is provided for generating non-classical isomers. Along with this program, other tools are also attached for accelerating future investigations of non-classical fullerenes. In addition, research to date is also reviewed.
Advisors/Committee Members: Dorn, Harry C. (committeechair), Madsen, Louis A. (committee member), Valeyev, Eduard Faritovich (committee member).
Subjects/Keywords: Fullerene; TNT-EMFs; Spiral Algorithm; Geometry; Structure Generation
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APA (6th Edition):
Liu, X. (2016). Generation of Heptagon-Containing Fullerene Structures by Computational Methods. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/83480
Chicago Manual of Style (16th Edition):
Liu, Xiaoyang. “Generation of Heptagon-Containing Fullerene Structures by Computational Methods.” 2016. Masters Thesis, Virginia Tech. Accessed April 20, 2021.
http://hdl.handle.net/10919/83480.
MLA Handbook (7th Edition):
Liu, Xiaoyang. “Generation of Heptagon-Containing Fullerene Structures by Computational Methods.” 2016. Web. 20 Apr 2021.
Vancouver:
Liu X. Generation of Heptagon-Containing Fullerene Structures by Computational Methods. [Internet] [Masters thesis]. Virginia Tech; 2016. [cited 2021 Apr 20].
Available from: http://hdl.handle.net/10919/83480.
Council of Science Editors:
Liu X. Generation of Heptagon-Containing Fullerene Structures by Computational Methods. [Masters Thesis]. Virginia Tech; 2016. Available from: http://hdl.handle.net/10919/83480
Rutgers University
23.
Gallagher, Erin Maureen, 1980-.
Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways.
Degree: PhD, Environmental Sciences, 2010, Rutgers University
URL: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052111
► Nitroaromatic compounds have been historically used as dyes, explosives and pesticides. The disposal of these products has caused widespread contamination of both soil and groundwater.…
(more)
▼ Nitroaromatic compounds have been historically used as dyes, explosives and pesticides. The disposal of these products has caused widespread contamination of both soil and groundwater. 2,4,6-trinitrotoluene (TNT) has been known as the worst of these contaminants because of the mutagenic properties of the compound, its persistence in the environment, and the wide range of sites that are contaminated with TNT. It is not only harmful to humans but it is also harmful to organisms in the lower trophic levels of ecosystems, and can affect the primary production of phytoplankton in the oceans.
The following series of experiments looks to determine ways that 2,4,6-trinitrotoluene could be biologically degraded in contaminated anaerobic environments. The experiments use dilution culturing, molecular techniques, and chemical analysis. Cultures were made from 3 different geographical sites (Arthur Kill, Norfolk Harbor, and an unexploded ordnance site in Hawaii) under both sulfidogenic and methanogenic conditions. The experiments demonstrate that there are bacteria present in the environment that could degrade TNT and the use of stable-isotope probing (SIP) in dilution cultures allowed the bacteria that are able to initially degrade TNT to be identified. The stable-isotope fed dilution cultures produced samples that were used for chemical analysis to determine pieces of the biological degradation pathway. These experiments determined that 1) there are bacteria that are able to utilize both the carbon and/or nitrogen present in TNT for growth and 2) toluene, methylphloroglucinol, benzoate or a benzoate derivative, and a cresol are all metabolites of anaerobic TNT degradation.
Advisors/Committee Members: Young, Lily (chair), Kerkhof, Lee (co-chair), Reinfelder, John (internal member), Jaffe, Peter (outside member).
Subjects/Keywords: Biodegradation; TNT (Chemical); Nitroaromatic compounds
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APA (6th Edition):
Gallagher, Erin Maureen, 1. (2010). Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways. (Doctoral Dissertation). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052111
Chicago Manual of Style (16th Edition):
Gallagher, Erin Maureen, 1980-. “Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways.” 2010. Doctoral Dissertation, Rutgers University. Accessed April 20, 2021.
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052111.
MLA Handbook (7th Edition):
Gallagher, Erin Maureen, 1980-. “Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways.” 2010. Web. 20 Apr 2021.
Vancouver:
Gallagher, Erin Maureen 1. Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways. [Internet] [Doctoral dissertation]. Rutgers University; 2010. [cited 2021 Apr 20].
Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052111.
Council of Science Editors:
Gallagher, Erin Maureen 1. Anaerobic degradation of 2,4,6- trinitrotoluene (TNT): molecular analysis of active degraders and metabolic pathways. [Doctoral Dissertation]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000052111
24.
SANTOS, Taciana Rocha dos.
Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo.
Degree: 2012, Universidade Federal de Pernambuco
URL: https://repositorio.ufpe.br/handle/123456789/10267
► CNPq
O reconhecimento de áreas de endemismo é essencial para entender a evolução espaço-temporal. Neste trabalho objetivei identificar as áreas de endemismo para mamíferos terrestres…
(more)
▼ CNPq
O reconhecimento de áreas de endemismo é essencial para entender a evolução espaço-temporal. Neste trabalho objetivei identificar as áreas de endemismo para mamíferos terrestres do Novo Mundo, e investigar os fatores biogeográficos e metodológicos envolvidos neste endemismo. Com dados de distribuição geográfica da IUCN, eu realizei uma PAE com todos os mamíferos excluindo as ordens Sirenia e Cetacea. Testei quadrículas de 1° ou 2°, com todos os mamíferos não aquáticos e com apenas terrestres (sem morcegos), com todas as quadrículas e removendo as ilhas, e dobrando o peso para surgimento do táxon (caractere) ou mantendo peso igual para todos os estados de caracteres. Apliquei algoritmos de parcimônia com o TNT (New Technology Search) usando em cada matriz o melhor nível de busca reconhecido em testes preliminares (encontrou a melhor resolução de árvore), e identifiquei a melhor árvore: a mais curta, e com Índice de Consistência (IC) e de
Retenção (IR) mais altos. Listei os clados com valores de bootstrap ≥ 75 e com no mínimo duas sinapomorfias autênticas, e reconheci no mapa as áreas de endemismo. Buscando a árvore mais parcimoniosa com todas as matrizes do Novo Mundo, com quadrículas de 1° e 2°, removendo os táxons de ampla vagilidade ou não, excluindo as ilhas ou não, em todos os níveis de buscas testados a melhor árvore foi encontrada com quadrículas de 2° removendo os morcegos, incluindo as ilhas e não alterando o peso dos estados dos caracteres (matriz NM2°Terrestres) tendo IC = 0,13 e IR = 0,87. Identifiquei oito áreas de endemismo representando as três Américas, predominantemente na latitude tropical, em florestas de altas altitudes, com 32 espécies endêmicas representando as ordens Rodentia, Soricomorpha, Lagomorpha, Carnivora, Artiodactyla e Primates. Três espécies estão classificadas como “dados deficientes” pela IUCN e não assumi serem espécies endêmicas. Das outras 27, duas de médio porte e as outras são
pequenos mamíferos. Mamíferos podem explorar vários nichos ecológicos, porém, nas áreas de endemismo no Novo Mundo percebi que fatores ecológicos, geográficos ou evolutivos devem interferir na distribuição de alguns táxons, formando as áreas de endemismo, pois existe uma forte relação dos mamíferos endêmicos do Novo Mundo com o habitat e o relevo das áreas. Reconheci que a quantidade e qualidade dos dados (tamanho e número das quadrículas, e excesso de quadrículas com mesma composição) influenciam os IC e IR da árvore, e possivelmente o excesso de táxons que ocorrem em muitas células interfira no arranjo da árvore mais parcimoniosa desvalorizando o bootstrap dos ramos e consequentemente prejudicando a identificação das áreas de endemismo.
Advisors/Committee Members: MORAES, Diego Astúa de.
Subjects/Keywords: TNT; IUCN; Áreas de endemismo; New Technology Search; Quadrículas; Repesagem
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APA (6th Edition):
SANTOS, T. R. d. (2012). Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo. (Masters Thesis). Universidade Federal de Pernambuco. Retrieved from https://repositorio.ufpe.br/handle/123456789/10267
Chicago Manual of Style (16th Edition):
SANTOS, Taciana Rocha dos. “Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo.” 2012. Masters Thesis, Universidade Federal de Pernambuco. Accessed April 20, 2021.
https://repositorio.ufpe.br/handle/123456789/10267.
MLA Handbook (7th Edition):
SANTOS, Taciana Rocha dos. “Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo.” 2012. Web. 20 Apr 2021.
Vancouver:
SANTOS TRd. Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo. [Internet] [Masters thesis]. Universidade Federal de Pernambuco; 2012. [cited 2021 Apr 20].
Available from: https://repositorio.ufpe.br/handle/123456789/10267.
Council of Science Editors:
SANTOS TRd. Análise parcimoniosa de endemismo (PAE) dos mamíferos terrestres do Novo Mundo. [Masters Thesis]. Universidade Federal de Pernambuco; 2012. Available from: https://repositorio.ufpe.br/handle/123456789/10267
25.
MATTOS, Alessandra Batista de.
Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo.
Degree: 2007, Universidade Federal de Pernambuco
URL: https://repositorio.ufpe.br/handle/123456789/1774
► Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
As determinações da troponina cardíaca T (TnT) podem contribuir para o diagnóstico e tratamento de infarto agudo…
(more)
▼ Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
As determinações da troponina cardíaca T (TnT) podem contribuir para o diagnóstico e tratamento de infarto agudo do miocárdio e para a estratificação dos riscos dos pacientes com síndromes coronárias agudas no que respeita ao risco relativo de mortalidade. Neste trabalho, um sistema de microbalança de quartzo por injeção de fluxo baseado na alteração de freqüência elétrica em resposta à ligação antígeno-anticorpo foi empregado para determinação da TnT cardíaca. As variações de freqüências foram registradas por um contador de freqüência acoplado a um microcomputador. O anticorpo monoclonal específico foi imobilizado sobre a superfície de um eletrodo de cristal de quartzo por ligação irreversível via monocamadas auto-organizadas. O adsorbato composto por filme de alcanotiól foi formado incubando uma solução de 2-aminoetanotiol (cisteamina) por 2 h, seguido por glutaraldeído a 2,5% (v/v).
Em seguida, anticorpos monoclonais anti- troponina T (anti-TnT) foram covalentemente imobilizados sobre o eletrodo de ouro do cristal de quartzo e foi usada uma solução de glicina (10mM) como agente bloqueante. Com o imunossensor desenvolvido foi possivel medir concentrações de troponina T com limite de detecção de 0,025 ng/mL. A superfície do sensor pode ser regenerada por injeção de uma solução do dodecil-sulfato de sódio 1% (p/v). A determinação da TnT foi realizada em amostras de soros humanos permitindo seu uso nas aplicações clínicas para diagnóstico do IAM
Advisors/Committee Members: SILVA, Valdinete Lins da.
Subjects/Keywords: TnT; SAM; QCM imunossensor
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APA (6th Edition):
MATTOS, A. B. d. (2007). Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo. (Masters Thesis). Universidade Federal de Pernambuco. Retrieved from https://repositorio.ufpe.br/handle/123456789/1774
Chicago Manual of Style (16th Edition):
MATTOS, Alessandra Batista de. “Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo.” 2007. Masters Thesis, Universidade Federal de Pernambuco. Accessed April 20, 2021.
https://repositorio.ufpe.br/handle/123456789/1774.
MLA Handbook (7th Edition):
MATTOS, Alessandra Batista de. “Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo.” 2007. Web. 20 Apr 2021.
Vancouver:
MATTOS ABd. Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo. [Internet] [Masters thesis]. Universidade Federal de Pernambuco; 2007. [cited 2021 Apr 20].
Available from: https://repositorio.ufpe.br/handle/123456789/1774.
Council of Science Editors:
MATTOS ABd. Determinação da troponina T cardíaca humana empregando sistema de microbalança de quartzo por injeção de fluxo. [Masters Thesis]. Universidade Federal de Pernambuco; 2007. Available from: https://repositorio.ufpe.br/handle/123456789/1774
Montana State University
26.
Pannier, Andy Joseph.
Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite.
Degree: MS, College of Letters & Science, 2009, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/2007
► Batch and column studies were conducted to examine the difference in the transformation pathways of 2,4,6-trinitrotoluene (TNT) reduction by a hemiascomycetous yeast (Yarrowia lipolytica AN-L15)…
(more)
▼ Batch and column studies were conducted to examine the difference in the transformation pathways of 2,4,6-trinitrotoluene (
TNT) reduction by a hemiascomycetous yeast (Yarrowia lipolytica AN-L15) under conditions of different initial pH of the culture medium or in the presence or absence of ferrihydrite. Using high performance liquid chromatography (HPLC), it was observed that Y. lipolytica AN-L15 was able to transform
TNT at three different initial proton concentrations of the culture medium: pH 7.0, pH 6.5, and pH 4.5. In the presence of
TNT, Y. lipolytica AN-L15 showed preferential growth (OD₆₀₀) at the lower initial pH of 4.5. The increased growth (OD₆₀₀) resulted in increased reduction of
TNT-metabolites in the culture medium with an initial pH of 4.5, as compared to, the culture medium with an initial pH of 6.5 or the culture medium with an initial pH of 7.0.
TNT transformation via aromatic ring reduction was the major transformation pathway observed, with the major metabolite being 3-H -̄
TNT. 4-hydroxylaminodinitrotoluene (4-HADNT) was the major metabolite of the nitro-group reduction pathway. In the presence of ferrihydrite at a pH of 7.0, the transformation of
TNT by Y. lipolytica AN-L15 showed a change in the transformation pathway. Nitro-group reduction was the major pathway of
TNT transformation in the presence of ferrihydrite with 4-HADNT and 2-aminodinitrotoluene (4-ADNT) being the major metabolites formed. The time it took to reduce
TNT was longer and the concentrations of
TNT-metabolites were lower in the presence of ferrihydrite than in its absence. This may have been due to competition for available electrons between
TNT and
TNT-metabolites and Fe(III). It is also possible that some of the intermediate products of
TNT transformation were oxidized back to
TNT-metabolites by Fe(III) resulting in lower concentrations of
TNT-metabolites and increased concentrations of Fe(II). This study demonstrates the complexity of the interactions of various environmental parameters, under controlled laboratory conditions, in the transformation of
TNT by Y. lipolytica AN-L15.
Advisors/Committee Members: Chairperson, Graduate Committee: Robin Gerlach (advisor).
Subjects/Keywords: TNT (Chemical); Nitroaromatic compounds
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APA (6th Edition):
Pannier, A. J. (2009). Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/2007
Chicago Manual of Style (16th Edition):
Pannier, Andy Joseph. “Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite.” 2009. Masters Thesis, Montana State University. Accessed April 20, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/2007.
MLA Handbook (7th Edition):
Pannier, Andy Joseph. “Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite.” 2009. Web. 20 Apr 2021.
Vancouver:
Pannier AJ. Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite. [Internet] [Masters thesis]. Montana State University; 2009. [cited 2021 Apr 20].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/2007.
Council of Science Editors:
Pannier AJ. Reductive transformation of 2,4,6-Trinitrotoluene by Yarrowia lipolytica AN-L15 under conditions of different initial pH of the culture medium or in the presence of ferrihydrite. [Masters Thesis]. Montana State University; 2009. Available from: https://scholarworks.montana.edu/xmlui/handle/1/2007
Montana State University
27.
VanEngelen, Catherine Elizabeth.
Alkaline hydrolysis of explosives.
Degree: PhD, College of Engineering, 2010, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/2465
► In the United States, ammunitions testing and manufacturing facilities must transform unused explosives into non-hazardous materials for disposal. 2,4,6- trinitrotoluene (TNT) is an explosive that…
(more)
▼ In the United States, ammunitions testing and manufacturing facilities must transform unused explosives into non-hazardous materials for disposal. 2,4,6- trinitrotoluene (
TNT) is an explosive that has been found as a soil and groundwater contaminant at numerous ammunitions testing sites. Unused quantities of nitrocellulose (NC), another explosive, have also been accumulating at ammunitions manufacturing facilities. Transformation of both
TNT and NC to non-explosive compounds has been studied using either chemical or biological approaches, each with limited success. With respect to
TNT, the use of alkaline hydrolysis (degradation at high pH) as a chemical treatment had been tested at room temperature (20°C) under conditions where the hydroxide concentration exceeded that of
TNT (pH > 10). These high hydroxide conditions were not directly amenable to biological treatment of the hydrolysis products. This study found that alkaline hydrolysis was effective for complete degradation of
TNT at elevated temperatures (60°C and 80°C) when the concentration of
TNT was less than the hydroxide concentration (pH 9 and 10). The resulting solution, or hydrolysate, contained no
TNT. This hydrolysate was used as the carbon and nitrogen source for an aerobic bacterial enrichment from the Bozeman wastewater treatment plant. With respect to NC, the back-log of accumulated NC necessitates a degradation method that will process high NC concentrations (200g/L). Alkaline hydrolysis at 60°C was used with very high hydroxide concentrations to rapidly degrade high concentrations of NC, producing high nitrate and nitrite concentrations. The NC hydrolysate was neutralized and spiked into a denitrifying culture which was able to reduce both nitrate and nitrite. The goal of this work was to develop a dual component chemical-biological system for complete degradation of the explosives
TNT and NC, which was achieved using alkaline hydrolysis as the chemical component and bacterial wastewater treatment enrichments as the biological component.
Advisors/Committee Members: Chairperson, Graduate Committee: Brent M. Peyton (advisor).
Subjects/Keywords: Hydrolysis; Bioremediation; TNT (Chemical); Nitrocellulose
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APA (6th Edition):
VanEngelen, C. E. (2010). Alkaline hydrolysis of explosives. (Doctoral Dissertation). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/2465
Chicago Manual of Style (16th Edition):
VanEngelen, Catherine Elizabeth. “Alkaline hydrolysis of explosives.” 2010. Doctoral Dissertation, Montana State University. Accessed April 20, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/2465.
MLA Handbook (7th Edition):
VanEngelen, Catherine Elizabeth. “Alkaline hydrolysis of explosives.” 2010. Web. 20 Apr 2021.
Vancouver:
VanEngelen CE. Alkaline hydrolysis of explosives. [Internet] [Doctoral dissertation]. Montana State University; 2010. [cited 2021 Apr 20].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/2465.
Council of Science Editors:
VanEngelen CE. Alkaline hydrolysis of explosives. [Doctoral Dissertation]. Montana State University; 2010. Available from: https://scholarworks.montana.edu/xmlui/handle/1/2465
Indian Institute of Science
28.
Madan, Aditi.
Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants.
Degree: PhD, Faculty of Science, 2018, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/3601
► Muscle contraction is a highly fine-tuned process that requires the precise and timely construction of large protein sub-assemblies to form sarcomeres, the individual contractile units.…
(more)
▼ Muscle contraction is a highly fine-tuned process that requires the precise and
timely construction of large protein sub-assemblies to form sarcomeres, the
individual contractile units. Mutations in many of the genes encoding constituent
proteins of this macromolecular machine result in defective functioning of the
muscle tissue, and in humans, often lead to myopathic conditions like cardiomyopathies and muscular dystrophies, which affect a considerable number of people the world over. As more information regarding causative mutations becomes available, it becomes imperative to explore mechanisms of muscle
development, maintenance and pathology.
In striated muscles, contraction is regulated by the thin filament-specific
tropomyosin (Tm) – troponin (Tn) complex (Ca2+-binding troponin-C, inhibitory
troponin-I and tropomyosin-binding troponin-T). These troponin subunits are
present in 1:1:1 ratio on thin filaments, with 1 Tm-Tn complex present on every
7th actin molecule. This stoichiometry is tightly regulated, and disturbances have
been associated with functional defects. Each of these proteins has multiple
isoforms, whose expression is controlled both spatially and temporally. The expression of specific combination of isoforms confers specific contractile properties to each muscle subtype.
Drosophila melanogaster has been a preferred model of choice to study various
aspects of muscle development for decades. In this study, the Indirect Flight
Muscles (IFMs) of Drosophila have been used to investigate developmental and
functional roles of two temporally regulated isoforms of a vital structural and
regulatory component of the sarcomere – Troponin T (
TnT). On a larger scale,
whole genome expression profiles of mutants that are null for major myofbrillar
proteins have also been discussed. IFMs serve as an excellent model system to
address these questions, owing to the extreme ease of genetic manipulability in
this system, and high degree of homology between mammalian and Dipteran
cytoskeletal proteins.
Chapter 1 covers basics of muscle biology, and the role of
TnT in muscle contraction. Phenomena responsible for generating diversity in genes encoding muscle proteins – alternative splicing and isoform switching – have also been discussed. These mechanisms are highly conserved, as are patterns of
TnT splicing and isoform expression across phyla. Mutations leading to altered splicing
patterns lead to myopathic conditions, and the importance of model systems to
study muscle biology has been emphasized. The advantages of studying Drosophila IFMs and a comprehensive overview of IFM development has been covered. The resources and experimental tools used have been described in
Chapter 2.
Two isoforms of
TnT are alternatively spliced in the Drosophila thorax – one containing alternative exon 10a (expressed in adult IFMs and jump muscle); and one containing alternative exon 10b (expressed in pupae and newly eclosed flies).
These exons are spliced in a mutually exclusive manner, and defects in splicing
have been reported to cause…
Advisors/Committee Members: Nongthomba, Upendra (advisor).
Subjects/Keywords: Troponin-T Isoforms; Indirect Flight Muscle Mutants; Drosophila melanogaster Model; Myopathies; GAL4; Troponin T (TnT); Drosophila Indirect Flight Muscles (IFMs); UAS-TnT; Molecular Genetics
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APA (6th Edition):
Madan, A. (2018). Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3601
Chicago Manual of Style (16th Edition):
Madan, Aditi. “Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed April 20, 2021.
http://etd.iisc.ac.in/handle/2005/3601.
MLA Handbook (7th Edition):
Madan, Aditi. “Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants.” 2018. Web. 20 Apr 2021.
Vancouver:
Madan A. Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Apr 20].
Available from: http://etd.iisc.ac.in/handle/2005/3601.
Council of Science Editors:
Madan A. Developmental and Functional Roles of Troponin-T Isoforms, and Exploring Genome-Wide Alterations in Drosophila Indirect Flight Muscle Mutants. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3601
University of North Texas
29.
Tsui-Bowen, Alethea.
Solid phase microextraction of amino-dinitrotoluenes in tissue.
Degree: 2004, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc4649/
► TNT (2,4,6-trinitrotoluene) readily and predominantly transforms to 2ADNT (2-amino-4,6-dinitrotoluene) and 4ADNT (4-amino-2,6-dinitrotoluene) in environmental matrixes and tissues. Solid phase microextraction (SPME) was used to extract…
(more)
▼ TNT (2,4,6-trinitrotoluene) readily and predominantly transforms to 2ADNT (2-amino-4,6-dinitrotoluene) and 4ADNT (4-amino-2,6-dinitrotoluene) in environmental matrixes and tissues. Solid phase microextraction (SPME) was used to extract ADNTs (amino-dinitrotoluenes) from tissue as a potential method to investigate the recalcitrance of metabolically-generated ADNTs versus absorbed ADNTs. Tubifex tubifex was allowed to metabolize
TNT into ADNTs in 24-hr static non-renewal exposure test followed by 24-hr depuration in clean reconstituted hard water. Polyacrylate-coated (PA) SPME fibers were then deployed and agitated in tissue homogenates containing metabolically-generated ADNTs for 48 hr to provide a measure of available ADNTs. Extractability of ADNTs from T. tubifex tissue containing metabolically-generated ADNTs was significantly less than extractability of ADNTs from T. tubifex tissue containing absorbed ADNTs: 50-60% and 81-90% of expected extractability based on fiber-water partition ratio. The lower SPME extractability of metabolically-generated ADNTs may stem from the unavailability of metabolically-generated ADNTs sequestered in tissue or bound to tissue macromolecules during metabolism of
TNT to ADNT. Tissue extractions using SPMEs may be able to estimate such bound organic residues in tissue and serve as potential indicators of toxicological bioavailability and biomagnification potential of tissue-associated organic compounds.
Advisors/Committee Members: La Point, Thomas W., 1949-, Waller, William T., Venables, Barney J..
Subjects/Keywords: TNT (Chemical) – Toxicology.; TNT (Chemical) – Environmental aspects.; amino-dinitrotoulene; extractability; metabolically-generated
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30.
Mendes, André Luiz Milhardes.
Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo.
Degree: 2012, :Coordenação de Mestrado em Engenharia Agrícola; Brasil; UEG; Programa de Pós-Graduação Stricto sensu em Engenharia Agrícola
URL: http://www.bdtd.ueg.br/handle/tede/178
► O crescimento da população, a expansão da agricultura, indústria, a degradação do meio ambiente, a disponibilidade e a má distribuição de água, motivam a reutilização…
(more)
▼ O crescimento da população, a expansão da agricultura, indústria, a degradação do meio ambiente, a disponibilidade e a má distribuição de água, motivam a reutilização de água para fins agrícolas principalmente em culturas que não são consumidas cruas. O objetivo deste trabalho foi avaliar o desenvolvimento da cultura de couve-flor irrigada por gotejamento superficial e subsuperficial utilizando água residuária como fertirrigação em diferentes coberturas de solo. O experimento foi realizado na Universidade Estadual de Goiás - UnUCET entre os meses de abril a julho de 2012 em Anápolis, Goiás. O experimento foi conduzido em esquema fatorial 2 x 2 x 3, em blocos casualizados, com três repetições, totalizando 36 parcelas experimentais, sendo 2 tipos de água, 2 tipos de sistemas de irrigação localizada e 3 tipos de cobertura de solo. As parcelas experimentais (tratamentos) são as águas (natural de poço profundo e residuária), os sistemas de irrigação
(gotejamento superficial e subsuperficial) e as coberturas de solo (Mulching, TNT e solo descoberto). Para a verificação da qualidade da água residuária e da água natural, foram analisados os seguintes parâmetros: pH, condutividade elétrica, temperatura, oxigênio dissolvido, turbidez. Para as análises quantitativas da água residuária foram analisados ainda: nitrato, nitrito, amônia, potássio, manganês, fosfato total, sódio, ferro total, ferro2+, ferro3+, dureza total, dureza de cálcio, dureza de magnésio, cálcio, magnésio, DQO, DBO, sólidos totais, coliformes totais e Escherichia coli. Como forma de analisar a cultura foram utilizados os seguintes parâmetros: área foliar da planta, altura de planta, teor de clorofila na folha, número de folhas por planta, peso médio da inflorescência, diâmetro transversal da inflorescência e análise microbiológica da inflorescência para verificar possíveis contaminações. Os sistemas de irrigação foram avaliados quanto à eficiência de aplicação e
distribuição da água. A tensão de água no solo foi determinada por um tensímetro digital de punção. Os dados obtidos foram submetidos à análise de variância por meio do teste F a 5% de significância e quando pertinente realizou-se o teste de Tukey para comparação de médias com mesmo nível de significância. Os resultados mais significativos apontaram a interação entre os tipos de água e o sistema de irrigação localizada por gotejamento superficial foram os que mais influenciaram as variáveis analisadas. O uso da água residuária resultou em economia de nutrientes comerciais. Os índices de uniformidade de distribuição da água de irrigação pelos gotejadores no início e no final do ciclo foram excelentes em todos os tratamentos. A tensão de água no solo foi mantida dentro de intervalo aceitável para o cultivo de couve-flor. A água residuária pode ser aplicada como fertirrigação na produção de couve-flor.
Population growth, the expansion of agriculture, industry, environmental
degradation, availability and poor water distribution, motivate the reuse of water for agricultural purposes especially in…
Advisors/Committee Members: Ferreira, Anamaria Achtschin, http://lattes.cnpq.br/1027301772032263, Avelino Neto, Sebastião, http://lattes.cnpq.br/2575723632599683, Seleguini, Alexsander, Campos, André Jose de, Pacco, Honorato Ccalli.
Subjects/Keywords: Fertirrigação; Mulching; TNT; Brassica Oleracea var; Botrytis; Fertigation; Mulching; TNT; Brassica oleracea var; Botrytis; CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA; ENGENHARIA DE AGUA E SOLO::IRRIGACAO E DRENAGEM; ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL
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APA (6th Edition):
Mendes, A. L. M. (2012). Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo. (Masters Thesis). :Coordenação de Mestrado em Engenharia Agrícola; Brasil; UEG; Programa de Pós-Graduação Stricto sensu em Engenharia Agrícola. Retrieved from http://www.bdtd.ueg.br/handle/tede/178
Chicago Manual of Style (16th Edition):
Mendes, André Luiz Milhardes. “Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo.” 2012. Masters Thesis, :Coordenação de Mestrado em Engenharia Agrícola; Brasil; UEG; Programa de Pós-Graduação Stricto sensu em Engenharia Agrícola. Accessed April 20, 2021.
http://www.bdtd.ueg.br/handle/tede/178.
MLA Handbook (7th Edition):
Mendes, André Luiz Milhardes. “Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo.” 2012. Web. 20 Apr 2021.
Vancouver:
Mendes ALM. Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo. [Internet] [Masters thesis]. :Coordenação de Mestrado em Engenharia Agrícola; Brasil; UEG; Programa de Pós-Graduação Stricto sensu em Engenharia Agrícola; 2012. [cited 2021 Apr 20].
Available from: http://www.bdtd.ueg.br/handle/tede/178.
Council of Science Editors:
Mendes ALM. Cultivo de couve-flor em função da utilização de água residuária, sistemas de gotejamento e coberturas do solo. [Masters Thesis]. :Coordenação de Mestrado em Engenharia Agrícola; Brasil; UEG; Programa de Pós-Graduação Stricto sensu em Engenharia Agrícola; 2012. Available from: http://www.bdtd.ueg.br/handle/tede/178
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