subject:(manganese)

Virginia Tech

1. Hoyland, Victoria Wheaton. Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants.

Degree: MS, Environmental Engineering, 2013, Virginia Tech

URL: http://hdl.handle.net/10919/19226

► Soluble manganese (Mn) presents a significant treatment challenge to many water utilities, causing aesthetic and operational concerns. Surface water treatment plants using ozonation followed by… (more)

Subjects/Keywords: manganese; biofilters; manganese-oxidizing bacteria

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APA (6^th Edition):

Hoyland, V. W. (2013). Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/19226

Chicago Manual of Style (16^th Edition):

Hoyland, Victoria Wheaton. “Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants.” 2013. Masters Thesis, Virginia Tech. Accessed March 07, 2021. http://hdl.handle.net/10919/19226.

MLA Handbook (7^th Edition):

Hoyland, Victoria Wheaton. “Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants.” 2013. Web. 07 Mar 2021.

Vancouver:

Hoyland VW. Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10919/19226.

Council of Science Editors:

Hoyland VW. Evaluating the use of manganese-oxidizing bacteria in surface water treatment plants. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/19226

2. Desai, Ishan. Manganese Based Oxidative Technologies For Water/Wastewater Treatment.

Degree: 2013, Texas Digital Library

URL: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66536

► Manganese is a commonly occurring mineral found in soil and sediments that takes part in chemical reactions in groundwater and soil systems. It plays a… (more)

▼ Manganese is a commonly occurring mineral found in soil and sediments that takes part in chemical reactions in groundwater and soil systems. It plays a significant role in controlling the environmental fate and transport of organic and inorganics by facilitating redox reactions. The reactivity of manganese oxides with some emerging contaminants like 4-tert octylphenol (OP) in aqueous systems is yet to be explored. Additionally, manganese's use within treatment systems designed to remove trace organics is yet to be fully developed. This research work explores the reactivity of manganese oxide to degrade OP in aqueous systems. The rate equation has been determined by conducting experiments at various conditions of oxide and organic loading as well as different pH's. The reaction order was found to be ??? 1.1 for both oxide as well as the organic. The reactivity was much higher under acidic conditions. The presence of metals and humic acids greatly reduced the reactivity. The primary reaction by-product observed in the system was 4-(2,4,4-trimethylpentan-2yl)benzene-1,2-diol. Magnetic manganese ferrites were further created in the laboratory using a novel combustion method in order to blend the catalytic properties of manganese with the magnetic and structural properties of ferrites. These laboratory prepared catalysts were thoroughly characterized using XRD, SEM, TEM, HR-TEM, and BET. Their magnetic properties have also been studied. These manganese ferrites offer the potential to enhance hydroxyl radical production within catalytic ozonation systems. Thus their catalyst effectiveness was determined by measuring R_(ct), ozone exposure, hydroxyl radical production, and ozone decomposition. The effect of catalyst type, catalyst dosage, pre-ozonation, pH, and presence of dissolved organic matter (DOM) on the hydroxyl radical production during catalytic ozonation was also explored. An increase in ozone dosage, catalyst dosage, and PVA content enhanced organic removal in the system. Organic removal was lower at a decreased system pH, in the presence of DOM, and with increasing levels of Mn incorporated into the catalyst. Pre-ozonation of the catalyst at lower dosages did not have an effect on the system, though extensive pre-ozonation greatly reduced catalyst activity. Overall, R_(ct) and organic removal were not correlated. Advisors/Committee Members: Boulanger, Bryan (advisor).

Subjects/Keywords: manganese oxide

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APA (6^th Edition):

Desai, I. (2013). Manganese Based Oxidative Technologies For Water/Wastewater Treatment. (Thesis). Texas Digital Library. Retrieved from http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66536

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

Chicago Manual of Style (16^th Edition):

Desai, Ishan. “Manganese Based Oxidative Technologies For Water/Wastewater Treatment.” 2013. Thesis, Texas Digital Library. Accessed March 07, 2021. http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66536.

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

MLA Handbook (7^th Edition):

Desai, Ishan. “Manganese Based Oxidative Technologies For Water/Wastewater Treatment.” 2013. Web. 07 Mar 2021.

Vancouver:

Desai I. Manganese Based Oxidative Technologies For Water/Wastewater Treatment. [Internet] [Thesis]. Texas Digital Library; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66536.

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

Council of Science Editors:

Desai I. Manganese Based Oxidative Technologies For Water/Wastewater Treatment. [Thesis]. Texas Digital Library; 2013. Available from: http://hdl.handle.net/1969; http://hdl.handle.net/2249.1/66536

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

Oregon State University

3. Westermann, D. T. (Dale Thomas), 1941-. The effect of chloride on the uptake of manganese by bush beans and sweet corn.

Degree: MS, Soils, 1965, Oregon State University

URL: http://hdl.handle.net/1957/48019

Subjects/Keywords: Manganese

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APA (6^th Edition):

Westermann, D. T. (Dale Thomas), 1. (1965). The effect of chloride on the uptake of manganese by bush beans and sweet corn. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/48019

Chicago Manual of Style (16^th Edition):

Westermann, D. T. (Dale Thomas), 1941-. “The effect of chloride on the uptake of manganese by bush beans and sweet corn.” 1965. Masters Thesis, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/48019.

MLA Handbook (7^th Edition):

Westermann, D. T. (Dale Thomas), 1941-. “The effect of chloride on the uptake of manganese by bush beans and sweet corn.” 1965. Web. 07 Mar 2021.

Vancouver:

Westermann, D. T. (Dale Thomas) 1. The effect of chloride on the uptake of manganese by bush beans and sweet corn. [Internet] [Masters thesis]. Oregon State University; 1965. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/48019.

Council of Science Editors:

Westermann, D. T. (Dale Thomas) 1. The effect of chloride on the uptake of manganese by bush beans and sweet corn. [Masters Thesis]. Oregon State University; 1965. Available from: http://hdl.handle.net/1957/48019

Oregon State University

4. Mannion, William Alphonsus. A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides.

Degree: PhD, Chemistry, 1969, Oregon State University

URL: http://hdl.handle.net/1957/46051

Subjects/Keywords: Manganese

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APA (6^th Edition):

Mannion, W. A. (1969). A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/46051

Chicago Manual of Style (16^th Edition):

Mannion, William Alphonsus. “A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides.” 1969. Doctoral Dissertation, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/46051.

MLA Handbook (7^th Edition):

Mannion, William Alphonsus. “A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides.” 1969. Web. 07 Mar 2021.

Vancouver:

Mannion WA. A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides. [Internet] [Doctoral dissertation]. Oregon State University; 1969. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/46051.

Council of Science Editors:

Mannion WA. A study of the Mn⁺² and Pb⁺²-Mn⁺² impurity systems in alkali chlorides. [Doctoral Dissertation]. Oregon State University; 1969. Available from: http://hdl.handle.net/1957/46051

Montana State University

5. Stensland, Gary Joel. Photoemission investigation of the electronic structure of manganese.

Degree: MS, College of Letters & Science, 1969, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/6157

Subjects/Keywords: Manganese.

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APA (6^th Edition):

Stensland, G. J. (1969). Photoemission investigation of the electronic structure of manganese. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/6157

Chicago Manual of Style (16^th Edition):

Stensland, Gary Joel. “Photoemission investigation of the electronic structure of manganese.” 1969. Masters Thesis, Montana State University. Accessed March 07, 2021. https://scholarworks.montana.edu/xmlui/handle/1/6157.

MLA Handbook (7^th Edition):

Stensland, Gary Joel. “Photoemission investigation of the electronic structure of manganese.” 1969. Web. 07 Mar 2021.

Vancouver:

Stensland GJ. Photoemission investigation of the electronic structure of manganese. [Internet] [Masters thesis]. Montana State University; 1969. [cited 2021 Mar 07]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6157.

Council of Science Editors:

Stensland GJ. Photoemission investigation of the electronic structure of manganese. [Masters Thesis]. Montana State University; 1969. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6157

University of Arizona

6. Felber, Danielle Maya. Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice .

Degree: 2019, University of Arizona

URL: http://hdl.handle.net/10150/632599

► Manganese (Mn) is an essential trace mineral vital for many biological processes. ZIP14, ZnT10, and ZIP8 are proteins first identified as transporters for iron (Fe)… (more)

Subjects/Keywords: Manganese; Transporters

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APA (6^th Edition):

Felber, D. M. (2019). Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/632599

Chicago Manual of Style (16^th Edition):

Felber, Danielle Maya. “Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice .” 2019. Masters Thesis, University of Arizona. Accessed March 07, 2021. http://hdl.handle.net/10150/632599.

MLA Handbook (7^th Edition):

Felber, Danielle Maya. “Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice .” 2019. Web. 07 Mar 2021.

Vancouver:

Felber DM. Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice . [Internet] [Masters thesis]. University of Arizona; 2019. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10150/632599.

Council of Science Editors:

Felber DM. Regulation of Metal Transporters, ZIP14 and ZnT10, by Manganese Intake in Mice . [Masters Thesis]. University of Arizona; 2019. Available from: http://hdl.handle.net/10150/632599

University of Arizona

7. Ormsby, Walter Blackstone. The crystal structure of manganese dioxide .

Degree: 1930, University of Arizona

URL: http://hdl.handle.net/10150/553088

Subjects/Keywords: Manganese.

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APA (6^th Edition):

Ormsby, W. B. (1930). The crystal structure of manganese dioxide . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/553088

Chicago Manual of Style (16^th Edition):

Ormsby, Walter Blackstone. “The crystal structure of manganese dioxide .” 1930. Masters Thesis, University of Arizona. Accessed March 07, 2021. http://hdl.handle.net/10150/553088.

MLA Handbook (7^th Edition):

Ormsby, Walter Blackstone. “The crystal structure of manganese dioxide .” 1930. Web. 07 Mar 2021.

Vancouver:

Ormsby WB. The crystal structure of manganese dioxide . [Internet] [Masters thesis]. University of Arizona; 1930. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10150/553088.

Council of Science Editors:

Ormsby WB. The crystal structure of manganese dioxide . [Masters Thesis]. University of Arizona; 1930. Available from: http://hdl.handle.net/10150/553088

Georgia Tech

8. Wiedeman, John Herman. The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity.

Degree: MS, Public health engineering, 1956, Georgia Tech

URL: http://hdl.handle.net/1853/25344

Subjects/Keywords: Manganese

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APA (6^th Edition):

Wiedeman, J. H. (1956). The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/25344

Chicago Manual of Style (16^th Edition):

Wiedeman, John Herman. “The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity.” 1956. Masters Thesis, Georgia Tech. Accessed March 07, 2021. http://hdl.handle.net/1853/25344.

MLA Handbook (7^th Edition):

Wiedeman, John Herman. “The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity.” 1956. Web. 07 Mar 2021.

Vancouver:

Wiedeman JH. The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity. [Internet] [Masters thesis]. Georgia Tech; 1956. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1853/25344.

Council of Science Editors:

Wiedeman JH. The reduction of manganese in reservoirs by the gaseous by-products of anaerobic bacterial activity. [Masters Thesis]. Georgia Tech; 1956. Available from: http://hdl.handle.net/1853/25344

University of British Columbia

9. Byfleet, Colin Russell. An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment.

Degree: PhD, Chemistry, 1969, University of British Columbia

URL: http://hdl.handle.net/2429/35954

► An electron spin resonance study has been carried out at room temperature, on a magnetically dilute single crystal of ammonium 9-molybdomanganate. A general method for… (more)

Subjects/Keywords: Manganese

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APA (6^th Edition):

Byfleet, C. R. (1969). An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment. (Doctoral Dissertation). University of British Columbia. Retrieved from http://hdl.handle.net/2429/35954

Chicago Manual of Style (16^th Edition):

Byfleet, Colin Russell. “An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment.” 1969. Doctoral Dissertation, University of British Columbia. Accessed March 07, 2021. http://hdl.handle.net/2429/35954.

MLA Handbook (7^th Edition):

Byfleet, Colin Russell. “An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment.” 1969. Web. 07 Mar 2021.

Vancouver:

Byfleet CR. An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment. [Internet] [Doctoral dissertation]. University of British Columbia; 1969. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2429/35954.

Council of Science Editors:

Byfleet CR. An electron paramagnetic resonance study of a manganese (IV) ion in a trigonal environment. [Doctoral Dissertation]. University of British Columbia; 1969. Available from: http://hdl.handle.net/2429/35954

University of Texas – Austin

10. -0092-6316. Cell and molecular mechanism of manganese transport by human SLC30A10.

Degree: PhD, Biochemistry, 2018, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/9332

► Manganese is an essential element, but overexposure is cytotoxic and has adverse effects on neurological health. In humans, manganese-induced neurotoxicity generally occurs due to exposure… (more)

▼ Manganese is an essential element, but overexposure is cytotoxic and has adverse effects on neurological health. In humans, manganese-induced neurotoxicity generally occurs due to exposure under occupational or environmental settings and resembles idiopathic Parkinson’s disease. In some cases, patients with compromised liver function due to diseases, such as cirrhosis, fail to excrete manganese and may develop manganese-induced parkinsonism in the absence of high exposure. While the nutritional and clinical significance of manganese is established, cellular mechanisms of manganese homeostasis are still unknown. A breakthrough in manganese metabolism came from the identification of a familial form of parkinsonism reported to occur due to mutations in SLC30A10. Findings in our lab have since determined that SLC30A10 acts as the primary manganese efflux transporter protein to protect cells against manganese-induced toxicity. Interestingly, SLC30A10 disease-causing mutants from parkinsonian patients discussed above were unable protect against high manganese. As manganese is ubiquitous in the environment, the long-term goal is to elucidate SLC30A10’s role in metal-induced neurodegenerative processes, which in turn lead to Parkinson-like symptoms in patients. This gap in knowledge hinders treatment development and will persist if molecular mechanisms of SLC30A10 are not understood. Our hypothesis is that SLC30A10 binds and transports manganese with higher affinity than other essential metals and that this activity is sensitive to cellular environment. Thus, the focus of this work was to determine the transport mechanism of SLC30A10 [subscript WT] using a combination of in vitro studies and physiologically relevant cell-based assays. A structure-function based mutagenesis strategy was used to target residues required for manganese efflux. Confocal microscopy was employed to assess subcellular localization of SLC30A10 in hepatic HepG2 cells, neuronal AF5 cells, fibroblasts from Slc30a10 [superscript -/-] mice, as well as in HeLa and HEK cell lines. Cell viability assays were used to compare efflux activity of SLC30A10 mutants, and quantitative metal measurement using inductively-coupled plasma mass spectrometry was used to measure intracellular manganese content and corroborate viability results. Taken together, findings from this study improve our understanding of cellular manganese homeostasis as it relates to neurotoxicity and provide biochemical data on SLC30A10 important for developing therapies against manganese toxicity Advisors/Committee Members: Mukhopadhyay, Somshuvra (advisor), Appling, Dean (committee member), Fast, Walter (committee member), Keatinge-Clay, Adrian (committee member), Messing, Robert (committee member).

Subjects/Keywords: Manganese; Transporter

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APA (6^th Edition):

-0092-6316. (2018). Cell and molecular mechanism of manganese transport by human SLC30A10. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/9332

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-0092-6316. “Cell and molecular mechanism of manganese transport by human SLC30A10.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://dx.doi.org/10.26153/tsw/9332.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-0092-6316. “Cell and molecular mechanism of manganese transport by human SLC30A10.” 2018. Web. 07 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-0092-6316. Cell and molecular mechanism of manganese transport by human SLC30A10. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Mar 07]. Available from: http://dx.doi.org/10.26153/tsw/9332.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-0092-6316. Cell and molecular mechanism of manganese transport by human SLC30A10. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://dx.doi.org/10.26153/tsw/9332

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Purdue University

11. O'Neal, Stefanie. Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis.

Degree: PhD, Health Sciences, 2015, Purdue University

URL: https://docs.lib.purdue.edu/open_access_dissertations/1138

O’Neal, Stefanie L. Ph.D., Purdue University, December 2015. Manganese Toxicity: Accumulation in Bone, Effect on Neurochemistry, Impact on Adult Neurogenesis. Major Professor: Wei Zheng. Advisors/Committee Members: Wei Zheng, Jason R Cannon, Ulrike Dydak, Yansheng Du.

Subjects/Keywords: manganese; neurogenesis

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APA (6^th Edition):

O'Neal, S. (2015). Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis. (Doctoral Dissertation). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_dissertations/1138

Chicago Manual of Style (16^th Edition):

O'Neal, Stefanie. “Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis.” 2015. Doctoral Dissertation, Purdue University. Accessed March 07, 2021. https://docs.lib.purdue.edu/open_access_dissertations/1138.

MLA Handbook (7^th Edition):

O'Neal, Stefanie. “Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis.” 2015. Web. 07 Mar 2021.

Vancouver:

O'Neal S. Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis. [Internet] [Doctoral dissertation]. Purdue University; 2015. [cited 2021 Mar 07]. Available from: https://docs.lib.purdue.edu/open_access_dissertations/1138.

Council of Science Editors:

O'Neal S. Manganese Toxicity: Accumulation in Bone, Effect on Brain Neurochemistry, and Impact on Adult Neurogenesis. [Doctoral Dissertation]. Purdue University; 2015. Available from: https://docs.lib.purdue.edu/open_access_dissertations/1138

Michigan State University

12. Hoffman, James I. The electrochemical deposition of manganese from an aqueous solution.

Degree: MS, Dept. of Geology, 1965, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:11289

Subjects/Keywords: Manganese

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APA (6^th Edition):

Hoffman, J. I. (1965). The electrochemical deposition of manganese from an aqueous solution. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:11289

Chicago Manual of Style (16^th Edition):

Hoffman, James I. “The electrochemical deposition of manganese from an aqueous solution.” 1965. Masters Thesis, Michigan State University. Accessed March 07, 2021. http://etd.lib.msu.edu/islandora/object/etd:11289.

MLA Handbook (7^th Edition):

Hoffman, James I. “The electrochemical deposition of manganese from an aqueous solution.” 1965. Web. 07 Mar 2021.

Vancouver:

Hoffman JI. The electrochemical deposition of manganese from an aqueous solution. [Internet] [Masters thesis]. Michigan State University; 1965. [cited 2021 Mar 07]. Available from: http://etd.lib.msu.edu/islandora/object/etd:11289.

Council of Science Editors:

Hoffman JI. The electrochemical deposition of manganese from an aqueous solution. [Masters Thesis]. Michigan State University; 1965. Available from: http://etd.lib.msu.edu/islandora/object/etd:11289

Rutgers University

13. Lefkowitz, Joshua, 1977-. Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite.

Degree: PhD, Environmental Science, 2016, Rutgers University

URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50538/

►

This dissertation examines Mn(II)-birnessite interactions to improve understanding of the geochemical cycling of manganese, their influence on other elemental cycles, and the fate and solubility… (more)

▼

This dissertation examines Mn(II)-birnessite interactions to improve understanding of the geochemical cycling of manganese, their influence on other elemental cycles, and the fate and solubility of trace metals through three studies that determined: (1) the influence of pH on Mn(II)-birnessite interactions under oxic and anoxic conditions, (2) how Zn(II) impacts Mn(II)-birnessite interactions, and (3) how Ni(II) impacts Mn(II)-birnessite interactions. UV-Vis spectroscopy and flame AAS were used in conjunction with XRD, XAS, ATR-FTIR and SEM to determine changes in solution chemistry concomitant with the reaction substrate in batch sorption experiments. Birnessite reacted at pH < 7.0 exhibited no bulk mineralogical transformation products. At pH 7.0-8.5, reaction with Mn(II) under anoxic conditions caused reductive transformation of birnessite into different end products contingent upon pH, the concentration of Mn(II) and/or the presence of either Zn(II) or Ni(II). For binary Mn(II)-birnessite systems, formation of feitknechtite (β-MnOOH) and manganite (γ-MnOOH) were observed at pH 7-8. At pH 8.0-8.5, Mn(II)-birnessite interactions produced hausmannite (Mn3O4). In oxic systems, reductive transformation of birnessite is complemented by surface catalyzed oxidation of Mn(II) by O2. Mn(II) was found to compete for sorption sites with Zn(II) at pH 6.5. At pH 7.5, Zn(II) and Mn(II) sorption were observed to be enhanced relative to the corresponding experiments where only one aqueous divalent metal was present. The speciation of Zn(II) was different than at pH 6.5 and XAS results in combination with XRD data demonstrate formation of spinel Zn(II)1-xMn(II)xMn(III)2O4. When Mn(II) is present in systems containing Ni(II)-birnessite at pH 6.5, Ni(II) edge-sharing surface complexes form. At pH 7.5, Mn(II) has a distinct impact on Ni(II) speciation. Transformation of Ni(II)-birnessite, following introduction of Mn(II), to a feitnechtite-like phase containing Ni(II) was evident by XRD and ATR-FTIR analyses; further conversion to manganite was inhibited. XAS, FTIR, and XRD analyses suggest that Ni(II) is incorporated into the feitknechtite-like structure. The results of this dissertation suggest that aqueous Mn(II) is an important control on the mineralogy and reactivity of natural Mn-oxides, as well as the fate and solubility of trace metals, particularly in aqueous geochemical environments with neutral to alkaline pH values.

Advisors/Committee Members: Lefkowitz, Joshua, 1977- (author), Elzinga, Evert (chair), Keating, Kristina (internal member), Ntarlagiannis, Dimitrios (internal member), Axe, Lisa (outside member).

Subjects/Keywords: Manganese oxides

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APA (6^th Edition):

Lefkowitz, Joshua, 1. (2016). Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50538/

Chicago Manual of Style (16^th Edition):

Lefkowitz, Joshua, 1977-. “Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite.” 2016. Doctoral Dissertation, Rutgers University. Accessed March 07, 2021. https://rucore.libraries.rutgers.edu/rutgers-lib/50538/.

MLA Handbook (7^th Edition):

Lefkowitz, Joshua, 1977-. “Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite.” 2016. Web. 07 Mar 2021.

Vancouver:

Lefkowitz, Joshua 1. Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2021 Mar 07]. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50538/.

Council of Science Editors:

Lefkowitz, Joshua 1. Impacts of Mn(II) on Mn-oxide mineralogy and trace metal solubility and speciation in reaction systems containing birnessite. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50538/

University of Utah

14. Hwang, Su Hyun. Phosphorus removal from manganese ore by plasma treatment.

Degree: MS, Metallurgical Engineering, 2011, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/218/rec/1851

► The contents of impurities, especially that of phosphorus, in manganese metal or in ferromanganese used in steelmaking are an important factor that affects product quality.… (more)

Subjects/Keywords: Ferro-manganese; Manganese ore; Phosphorus; Plasma

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APA (6^th Edition):

Hwang, S. H. (2011). Phosphorus removal from manganese ore by plasma treatment. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/218/rec/1851

Chicago Manual of Style (16^th Edition):

Hwang, Su Hyun. “Phosphorus removal from manganese ore by plasma treatment.” 2011. Masters Thesis, University of Utah. Accessed March 07, 2021. http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/218/rec/1851.

MLA Handbook (7^th Edition):

Hwang, Su Hyun. “Phosphorus removal from manganese ore by plasma treatment.” 2011. Web. 07 Mar 2021.

Vancouver:

Hwang SH. Phosphorus removal from manganese ore by plasma treatment. [Internet] [Masters thesis]. University of Utah; 2011. [cited 2021 Mar 07]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/218/rec/1851.

Council of Science Editors:

Hwang SH. Phosphorus removal from manganese ore by plasma treatment. [Masters Thesis]. University of Utah; 2011. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/218/rec/1851

15. Drahoš, Bohuslav. Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II).

Degree: Docteur es, Chimie inorganique, 2011, Orléans; Univerzita Karlova (Prague)

URL: http://www.theses.fr/2011ORLE2039

►

La thèse se concentre sur la synthèse et la caractérisation de nouveaux complexes de manganèse comme alternative possible aux complexes de gadolinium, actuellement les agents… (more)

▼

La thèse se concentre sur la synthèse et la caractérisation de nouveaux complexes de manganèse comme alternative possible aux complexes de gadolinium, actuellement les agents de contraste de choix pour l’Imagerie par Résonance Magnétique (IRM). Dans cette perspective, nous nous sommes intéressés à trois groupes de ligands pentadentés pour la complexation de Mn2+. Des nombres de coordination de 6 ou 7 ont été déterminés par cristallographie pour ces complexes, permettant la coordination d’une ou deux molécules d’eau en première sphère de coordination de Mn2+. La stabilité thermodynamique de ces complexes est plus faible que celle de complexes polyaminocarboxylates et leur dissociation est très rapide comparée à [Mn(nota)] et [Mn(dota)]2-. Seuls les complexes de Mn2+ avec des ligands macrocycliques à 12 atomes sont oxydés en Mn3+ à l’air. Les relaxivités des complexes bishydratés sont deux fois plus élevées que celles des complexes monohydratés et elles sont comparables à celles des agents de contraste commerciaux. Les données de RMN d’17O mesurées à différentes températures ont montré que l’échange d’eau peut être lent, intermédiaire, ou rapide selon le ligand. Les mesures à hautes pressions ont confirmé que le mécanisme d’échange est de type dissociatif pour les complexes avec un nombre de coordination de 7 et de type associatif pour les complexes avec un nombre de coordination de 6. Les petits anions bidentés endogènes peuvent remplacer une molécule d’eau dans les complexes bishydratés de macrocycles pentaazotés à 15 atomes, alors que pour les autres soit le complexe se décompose, soit il n’y a pas d’influence.

The thesis is focused on the synthesis and characterization of novel manganese complexes as alternative to Gd3+ chelates which are wide-spread contrast agents in Magnetic Resonance Imaging (MRI). In this perspective, three structurally different groups of pentadentate ligands for Mn2+ complexation have been investigated. Coordination numbers of 6 or 7 were determined in the crystal structure of the Mn2+ complexes enabling one or two water molecules in the first sphere. The thermodynamic stability of the chelates is lower than that of polyaminocarboxylate complexes and their dissociation is very fast in comparison to [Mn(nota)] and [Mn(dota)]2–. Only Mn2+ complexes with 12- membered ligands undergo oxidation in air to Mn3+ species. The proton relaxivities of the bishydrated complexes are two times higher than those for monohydrated complexes and are comparable to those of commercial contrast agents. Variable-temperature 17O NMR data revealed that the water exchange varies from slow to intermediate or to extremely fast, depending on the ligand. High-pressure 17O NMR measurements confirmed dissociative water exchange mechanism on complexes with CN = 7 and associative mechanism on complexes with CN = 6. Small endogenous bidentate anions are capable of replacing only one water molecule in the bishydrated complex with the 15-membered pentaaza ligand (L2), while in other cases the complex is decomposed or no…

Advisors/Committee Members: Jakab-Toth, Eva (thesis director), Lukeš, Ivan (thesis director).

Subjects/Keywords: Complexes de manganese(II); Manganese(II) complexes

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APA (6^th Edition):

Drahoš, B. (2011). Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II). (Doctoral Dissertation). Orléans; Univerzita Karlova (Prague). Retrieved from http://www.theses.fr/2011ORLE2039

Chicago Manual of Style (16^th Edition):

Drahoš, Bohuslav. “Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II).” 2011. Doctoral Dissertation, Orléans; Univerzita Karlova (Prague). Accessed March 07, 2021. http://www.theses.fr/2011ORLE2039.

MLA Handbook (7^th Edition):

Drahoš, Bohuslav. “Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II).” 2011. Web. 07 Mar 2021.

Vancouver:

Drahoš B. Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II). [Internet] [Doctoral dissertation]. Orléans; Univerzita Karlova (Prague); 2011. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2011ORLE2039.

Council of Science Editors:

Drahoš B. Potential contrast agents for MRI based on manganese (II) complexes : Les agents de contrast potentiels pour MRI derivé par les complexes de manganese(II). [Doctoral Dissertation]. Orléans; Univerzita Karlova (Prague); 2011. Available from: http://www.theses.fr/2011ORLE2039

Texas A&M University

16. Smyth, Alison Michelle. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.

Degree: MS, Oceanography, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153557

► Despite the known reactivity of ozone (O_(3)) in water and ozone’s environmental importance in the atmosphere, there are relatively few studies published examining the chemistry… (more)

Subjects/Keywords: Manganese; Seawater; Ozone

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APA (6^th Edition):

Smyth, A. M. (2014). The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153557

Chicago Manual of Style (16^th Edition):

Smyth, Alison Michelle. “The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.” 2014. Masters Thesis, Texas A&M University. Accessed March 07, 2021. http://hdl.handle.net/1969.1/153557.

MLA Handbook (7^th Edition):

Smyth, Alison Michelle. “The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.” 2014. Web. 07 Mar 2021.

Vancouver:

Smyth AM. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1969.1/153557.

Council of Science Editors:

Smyth AM. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153557

Northeastern University

17. Alsulimani, Helal. Effect of hemochromatosis on manganese neurotoxicity.

Degree: PhD, School of Pharmacy, 2017, Northeastern University

URL: http://hdl.handle.net/2047/D20261904

► Manganese (Mn) is an essential element for normal brain function, but excess levels of Mn in the brain are associated with a number of behavioral… (more)

Subjects/Keywords: hemochromatosis; manganese; neurotoxicity

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APA (6^th Edition):

Alsulimani, H. (2017). Effect of hemochromatosis on manganese neurotoxicity. (Doctoral Dissertation). Northeastern University. Retrieved from http://hdl.handle.net/2047/D20261904

Chicago Manual of Style (16^th Edition):

Alsulimani, Helal. “Effect of hemochromatosis on manganese neurotoxicity.” 2017. Doctoral Dissertation, Northeastern University. Accessed March 07, 2021. http://hdl.handle.net/2047/D20261904.

MLA Handbook (7^th Edition):

Alsulimani, Helal. “Effect of hemochromatosis on manganese neurotoxicity.” 2017. Web. 07 Mar 2021.

Vancouver:

Alsulimani H. Effect of hemochromatosis on manganese neurotoxicity. [Internet] [Doctoral dissertation]. Northeastern University; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2047/D20261904.

Council of Science Editors:

Alsulimani H. Effect of hemochromatosis on manganese neurotoxicity. [Doctoral Dissertation]. Northeastern University; 2017. Available from: http://hdl.handle.net/2047/D20261904

University of Johannesburg

18. Gutzmer, Jens. Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa.

Degree: PhD, 2012, University of Johannesburg

URL: http://hdl.handle.net/10210/5803

► The economically important sedimentary manganese deposits of the Paleoproterozoic Kalahari and Postmasburg manganese fields, are situated in close geographic vicinity to each other in the… (more)

▼ The economically important sedimentary manganese deposits of the Paleoproterozoic Kalahari and Postmasburg manganese fields, are situated in close geographic vicinity to each other in the Griqualand West region of the Northern Cape Province, South Africa. This thesis describes aspects of mineralogy, petrography and geochemistry of the manganese ores with the purpose to establish genetic models for genesis and alteration of manganese ores of both manganese fields. The Kalahari manganese field, situated some 60 km northwest of Kuruman, is the largest known land-based manganese deposit. Manganese ores occur interbedded with iron-formations of the Hotazel Formation of the Voelwater Subgroup of the Late Archean-Paleoproterozoic Transvaal Supergroup. The sediments of the Voelwater Subgroup are preserved in five erosional relics, of which the Kalahari manganese deposit is by far the largest and the only one of economic importance. Two types of ore are mined, low-grade sedimentary Mamatwan-type ore and high-grade Wesselstype ore. Mamatwan-type ore is represented by microcrystalline laminated braunite-lutite composed of kutnahorite, Mn-calcite, braunite and hematite, modified by the occurrence of late diagenetic or metamorphic hausmannite, partridgeite, manganite and calcite. Mamatwan-type ore contains up to 38 mass % Mn and constitutes about 97 % of the ore reserves in the Kalahari manganese deposit. High-grade Wessels-type ore, with a manganese content of between 42 to 48 mass % Mn (on average), constitutes about 3 % of the ore reserves. It occurs only in the northwestern part of the main Kalahari deposit, and in small deposits at Hotazel and Langdon, in association with a system of north-south striking normal faults. The Wessels alteration event is thought to be related to the Kibaran orogenetic event (about 1.1 Ga). Fault zones are ferruginized and alongside faults sedimentary Mamatwan-type ore has been hydrothermally upgraded to Wessels-type ore. Metasomatic fronts are defined by changing mineral associations. These associations clearly illustrate that decreasing degrees of alteration relate to increasing distance from the fluid feeders. Areas of unaltered Mamatwan-type ore are preserved in the core of fault blocks. Wessels-type ore consists mostly of hausmannite, bixbyite, braunite II and manganite and subordinate gangue minerals such as clinochlore and andradite but the mineral assemblage associated with the Wessels alteration event is unusually diverse. More than 100 minerals have been identified, amongst them 8 new mineral species and an unusual, ferrimagnetic, Fe-rich variety of hausmannite. Mass balance calculations illustrate that the upgrading of the Wessels-type manganese ore is a consequence of leaching of CaO, MgO, CO 2, and Si02 from a low-grade Mamatwan-type precursor. This metasomatic process results in increasing secondary porosities, compaction of the orebody to two thirds of its original thickness and consequently residual enrichment of manganese in the ores. Three younger alteration events are observed…

Subjects/Keywords: Manganese ores - South Africa; Manganese - South Africa; Manganese ores - Geology

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APA (6^th Edition):

Gutzmer, J. (2012). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa. (Doctoral Dissertation). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/5803

Chicago Manual of Style (16^th Edition):

Gutzmer, Jens. “Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa.” 2012. Doctoral Dissertation, University of Johannesburg. Accessed March 07, 2021. http://hdl.handle.net/10210/5803.

MLA Handbook (7^th Edition):

Gutzmer, Jens. “Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa.” 2012. Web. 07 Mar 2021.

Vancouver:

Gutzmer J. Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa. [Internet] [Doctoral dissertation]. University of Johannesburg; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10210/5803.

Council of Science Editors:

Gutzmer J. Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa. [Doctoral Dissertation]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/5803

University of Johannesburg

19. Coertzen, Wouter Johan. A proposed TQM model for a cellhouse producing electrolytic manganese.

Degree: 2014, University of Johannesburg

URL: http://hdl.handle.net/10210/8945

►

M.Tech. (Operations Management)

Total Quality Management is a management philosophy embracing all activities through which the needs and requirements of customers and the objectives of… (more)

Subjects/Keywords: Total quality management; Electrolytic manganese; Manganese; Manganese Metal Company (Firm : South Africa)

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APA (6^th Edition):

Coertzen, W. J. (2014). A proposed TQM model for a cellhouse producing electrolytic manganese. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/8945

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

Chicago Manual of Style (16^th Edition):

Coertzen, Wouter Johan. “A proposed TQM model for a cellhouse producing electrolytic manganese.” 2014. Thesis, University of Johannesburg. Accessed March 07, 2021. http://hdl.handle.net/10210/8945.

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

MLA Handbook (7^th Edition):

Coertzen, Wouter Johan. “A proposed TQM model for a cellhouse producing electrolytic manganese.” 2014. Web. 07 Mar 2021.

Vancouver:

Coertzen WJ. A proposed TQM model for a cellhouse producing electrolytic manganese. [Internet] [Thesis]. University of Johannesburg; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10210/8945.

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

Council of Science Editors:

Coertzen WJ. A proposed TQM model for a cellhouse producing electrolytic manganese. [Thesis]. University of Johannesburg; 2014. Available from: http://hdl.handle.net/10210/8945

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

Universiteit Utrecht

20. Nawrocki, R.P. Role of manganese: Are welders at risk?.

Degree: 2012, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/253889

► Serious concerns exist among welders and occupational health investigators on the possible association between exposure to manganese via welding fumes and neurological effects. One suggestion… (more)

Subjects/Keywords: manganese; parkinsons disease; welders

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APA (6^th Edition):

Nawrocki, R. P. (2012). Role of manganese: Are welders at risk?. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/253889

Chicago Manual of Style (16^th Edition):

Nawrocki, R P. “Role of manganese: Are welders at risk?.” 2012. Masters Thesis, Universiteit Utrecht. Accessed March 07, 2021. http://dspace.library.uu.nl:8080/handle/1874/253889.

MLA Handbook (7^th Edition):

Nawrocki, R P. “Role of manganese: Are welders at risk?.” 2012. Web. 07 Mar 2021.

Vancouver:

Nawrocki RP. Role of manganese: Are welders at risk?. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Mar 07]. Available from: http://dspace.library.uu.nl:8080/handle/1874/253889.

Council of Science Editors:

Nawrocki RP. Role of manganese: Are welders at risk?. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/253889

21. Kachhawaha, M S. Physico chemical studies of manganese complexes; -.

Degree: Chemistry, 1961, INFLIBNET

URL: http://shodhganga.inflibnet.ac.in/handle/10603/41898

None

Bibliography given

Advisors/Committee Members: Bhattacharya, A K.

Subjects/Keywords: manganese complexes

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APA (6^th Edition):

Kachhawaha, M. S. (1961). Physico chemical studies of manganese complexes; -. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/41898

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

Chicago Manual of Style (16^th Edition):

Kachhawaha, M S. “Physico chemical studies of manganese complexes; -.” 1961. Thesis, INFLIBNET. Accessed March 07, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/41898.

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

MLA Handbook (7^th Edition):

Kachhawaha, M S. “Physico chemical studies of manganese complexes; -.” 1961. Web. 07 Mar 2021.

Vancouver:

Kachhawaha MS. Physico chemical studies of manganese complexes; -. [Internet] [Thesis]. INFLIBNET; 1961. [cited 2021 Mar 07]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/41898.

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

Council of Science Editors:

Kachhawaha MS. Physico chemical studies of manganese complexes; -. [Thesis]. INFLIBNET; 1961. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/41898

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

University of Alberta

22. Zhang, Lin. Thin film manganese silicides: mechanisms of formation and optical properties.

Degree: MS, Department of Mining, Metallurgical and Petroleum Engineering, 1990, University of Alberta

URL: https://era.library.ualberta.ca/files/hd76s254k

Subjects/Keywords: Manganese silicide.

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APA (6^th Edition):

Zhang, L. (1990). Thin film manganese silicides: mechanisms of formation and optical properties. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/hd76s254k

Chicago Manual of Style (16^th Edition):

Zhang, Lin. “Thin film manganese silicides: mechanisms of formation and optical properties.” 1990. Masters Thesis, University of Alberta. Accessed March 07, 2021. https://era.library.ualberta.ca/files/hd76s254k.

MLA Handbook (7^th Edition):

Zhang, Lin. “Thin film manganese silicides: mechanisms of formation and optical properties.” 1990. Web. 07 Mar 2021.

Vancouver:

Zhang L. Thin film manganese silicides: mechanisms of formation and optical properties. [Internet] [Masters thesis]. University of Alberta; 1990. [cited 2021 Mar 07]. Available from: https://era.library.ualberta.ca/files/hd76s254k.

Council of Science Editors:

Zhang L. Thin film manganese silicides: mechanisms of formation and optical properties. [Masters Thesis]. University of Alberta; 1990. Available from: https://era.library.ualberta.ca/files/hd76s254k

Oregon State University

23. Murphy, Kim Marie. Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis.

Degree: MS, Oceanography, 1984, Oregon State University

URL: http://hdl.handle.net/1957/29593

► Transition metal and rare earth element (REE) data are presented for various sedimentary materials from two Manganese Nodule Program (MANOP) sites in the eastern tropical… (more)

▼ Transition metal and rare earth element (REE) data are presented for various sedimentary materials from two Manganese Nodule Program (MANOP) sites in the eastern tropical Pacific. These data constrain the sources of elemental supply to the seafloor and the processes that control ferromanganese nodule genesis. Investigation of elemental partitioning between suspended particles, sediments, ferromanganese nodules, crusts, and micronodules indicates that particle settling dominates REE supply to the seafloor at MANOP site H. Partitioning of the particle flux reveals that although detrital and labile particles both convey REE to H sediments and nodules, labile biogenic debris is the primary source of REE accreted by site H nodules. Evidence from REE abundance patterns and correlations of REE with other elements define three basic processes of nodule accretion: (1) hydrogenous or direct seawater precipitation; (2) oxic diagenesis, referring to a variety of ferromanganese accretion processes which occur in oxic sediments; and (3) suboxic diagenesis, in which Mn is mobilized by the oxidation of sedimentary organic matter. The REE geochemistry of site H nodules suggests an additional accretionary process, resulting from the degradation of labile organic matter in an oxic environment. Contrasts in REE patterns, major element compositions, and fluxes of various elements in sedimentary samples from MANOP site H (a nodule-bearing site) with site M (a nodule-free site) reveal differences in the sources of material to the seafloor in the two environments. Geochemical data imply a greater hydrothermal influence and a greater accumulation of organic carbon in site M sediments relative to those at site H. Comparisons of the REE and major element geochemistry of H and M sediment traps, sediments, and crusts, as well as nodules from site H, imply that the reductive mobilization of Mn and geochemically similar elements is controlled primarily by surface water biological productivity and the accumulation of organic carbon in the sediments. The organic flux to the sediments determines the degree of depletion of oxidants, which governs the reduction, mobilization, and supply of metals to nodule surfaces. It appears that the depth to the Mn redox boundary and possibly seasonal variations in the flux of organic material to the seafloor determine whether nodules grow or whether Mn is exported to bottom waters. Advisors/Committee Members: Dymond, Jack (advisor), Heath, Ross (committee member).

Subjects/Keywords: Manganese nodules

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APA (6^th Edition):

Murphy, K. M. (1984). Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/29593

Chicago Manual of Style (16^th Edition):

Murphy, Kim Marie. “Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis.” 1984. Masters Thesis, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/29593.

MLA Handbook (7^th Edition):

Murphy, Kim Marie. “Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis.” 1984. Web. 07 Mar 2021.

Vancouver:

Murphy KM. Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis. [Internet] [Masters thesis]. Oregon State University; 1984. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/29593.

Council of Science Editors:

Murphy KM. Transition metal and rare earth element fluxes at two sites in the eastern tropical Pacific : relationship to ferromanganese nodule genesis. [Masters Thesis]. Oregon State University; 1984. Available from: http://hdl.handle.net/1957/29593

Cornell University

24. Bocioaga, Daniela. Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1.

Degree: PhD, Microbiology, 2013, Cornell University

URL: http://hdl.handle.net/1813/34222

► The purpose of this research is to understand the molecular mechanism of manganese oxidation in Leptothrix discophora SS1 which until now has been hampered by… (more)

▼ The purpose of this research is to understand the molecular mechanism of manganese oxidation in Leptothrix discophora SS1 which until now has been hampered by the lack of a genetic system. Leptothrix discophora SS1 is an important model organism that has been used to study the mechanism and consequences of biological manganese oxidation. In this study we report on the development of a genetic system for L. discophora. First, the antibiotic sensitivity of L. discophora was characterized and a procedure for transformation with exogenous DNA via conjugation was developed and optimized, resulting in a maximum transfer frequency of 5.2*10-1 (transconjugant/donor). Genetic manipulation of Leptothrix was demonstrated by disrupting pyrF via chromosomal integration of a plasmid with an R6Kɣ ori through homologous recombination. This resulted in resistance to fluoroorotidine which was abolished by complementation with an ectopically expressed copy of pyrF cloned into pBBR1MCS-5. This genetic system was further used to disrupt five genes in Leptothrix discophora SS1, which were considered to be the best candidates for the enzyme encoding the manganese oxidizing activity in this bacterium. All of the disrupted mutants continued to oxidize manganese, suggesting that these genes may not play a role in manganese oxidation, as hypothesized. MofA a putative muticopper oxidase, identified from the oxidizing fraction of Leptothrix discophora SS1 supernatant to encode the manganese oxidizing activity, was deleted from the genome and the cells lacking mofA did not lose the ability to oxidize manganese. This finding suggests that mofA is dispensable to Mn oxidation in Leptothrix. Transposon mutagenesis performed on a [INCREMENT]mofA Leptothrix strain resulted in the isolation of white, non-manganese oxidizing mutants. Mapping of the transposon insertions identified insertions in 4 genes located in 2 regions on the chromosome. One of the genes, named mnxG2 is a putative multicopper oxidase similar to the manganese oxidizing enzyme in Bacillus sp SG-1. The other three genes with insertions encode a hypothetical protein, a putative cytochrome c next to a putative copper metallochaperone (Sco1/SenC/PrrC) involved in the biogenesis of cytochrome oxidase. Further analysis of the nonmanganese oxidizing mutants identified through transposon mutagenesis coupled with the draft genome sequence of Leptothrix discophora SS1 should provide information about the number and the nature of proteins involved in manganese oxidation in this bacterium. The draft genome of Leptothrix discophora SS1 contains 4.2Mb with 3,791 identified protein coding sequences. In contrast with previous information of Leptothrix as an obligate aerobic heterotroph, functional analysis of the draft genome revealed the potential for a diverse metabolism such as fermentation, anaerobic respiration with nitrate and arsenate, sulfur oxidation and carbon fixation. The information provided by the draft genome about the metabolism of L. discophora SS1 as well as genomic context… Advisors/Committee Members: Hay, Anthony G. (chair), Lion, Leonard William (committee member), Helmann, John D (committee member), Ghiorse, William Cushing (committee member).

Subjects/Keywords: manganese oxidation; leptothrix; sheathed bacteria

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APA (6^th Edition):

Bocioaga, D. (2013). Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/34222

Chicago Manual of Style (16^th Edition):

Bocioaga, Daniela. “Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1.” 2013. Doctoral Dissertation, Cornell University. Accessed March 07, 2021. http://hdl.handle.net/1813/34222.

MLA Handbook (7^th Edition):

Bocioaga, Daniela. “Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1.” 2013. Web. 07 Mar 2021.

Vancouver:

Bocioaga D. Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1813/34222.

Council of Science Editors:

Bocioaga D. Understanding The Molecular Mechanism Of Manganese Oxidation In Leptothrix Discophora Ss1. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/34222

25. Caldera, Emmanuel. Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese.

Degree: PhD, Animal Sciences, 2015, Colorado State University

URL: http://hdl.handle.net/10217/166925

► Trace minerals have long been identified as essential components in the diets of domestic livestock species. The mechanisms underlying Cu, Zn, and Mn absorption are… (more)

▼ Trace minerals have long been identified as essential components in the diets of domestic livestock species. The mechanisms underlying Cu, Zn, and Mn absorption are complex, but research has demonstrated interesting opportunities to optimize the involvement of trace minerals in ruminant nutrition. To further our understanding of absorption and retention of modern forms of trace minerals 4 experiments were conducted to examine in vitro and in vivo characteristics of Intellibond (IB) and sulfate forms of copper (Cu), zinc (Zn), and manganese (Mn). In experiment 1, in vitro incubations were used to examine the effects of pH and mineral concentration and source (IB vs sulfate) on Cu, Zn, and Mn solubility. Solubility was measured at elemental concentrations ranging from 0.1 to 10.0 mg of product/ml (0.1, 1.0, and 10.0 mg/ml) at: 1) pH 5.5 (in McDougal's artificial saliva mixture 0.1 M NaHCO3-Na2HPO4KCl- MgSO4*7H2O-urea buffer) and 2) pH 2.0 (in McDougal's artificial saliva mixture 0.1 M NaHCO3-Na2HPO4KCl- MgSO4*7H2O-urea buffer). On average, the overall solubility of Cu, Zn, and Mn, from both trace mineral sources were similar at a pH 5.0 and 2.0. In Experiment 2 eight cross-bred steers were utilized to estimate the duodenal appearance of Cu, Zn, and Mn in steers post ruminal administration of IB and sulfate forms of Cu, Zn, and Mn in steers fed a corn silage and steam flaked corn-based diet. Treatments consisted of 1) 60 mg of Zn/kg DM from ZnSO4; 20 mg of Cu/kg DM from CuSO4; 40 mg of Mn/kg DM from MnSO4, and 2) 60 mg of Zn/kg DM from tetra-basic ZnCl; 20 mg of Cu/kg DM from tri-basic CuCl; 40 mg of Mn/kg DM from tri-basic MnCl. Individual trace mineral treatments were thoroughly mixed with 0.23 kg of ground corn and administered as a single dose via the rumen fistula. Rumen and duodenal samples were obtained at -4, -2, 0 h, pre dosing and at 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, and 42 h post dosing. Duodenal appearance of Cu, Mn, and Zn post ruminal administration of different trace mineral sources were similar across treatments. In experiment 3, eight cross-bred steers were utilized in a 19 d experiment to investigate the effects of trace mineral source on apparent absorption and retention of Cu, Zn, and Mn in steers fed a corn silage and steam flaked corn-based diet. Steers were blocked by BW and randomly assigned to one of the 2 treatments. Treatments consisted of: 1) 30 mg of Zn/kg DM from ZnSO4; 10 mg of Cu/kg DM from CuSO4; 20 mg of Mn/kg DM from MnSO4; and 2) 30 mg of Zn/kg DM from tetra-basic ZnCl; 10 mg of Cu/kg DM from tri-basic CuCl; 20 mg of Mn/kg DM from tri-basic MnCl. Total fecal and urine output was measured daily for all steers during the 5 d collection period. Dry matter disappearance, apparent absorption, and apparent retention of Cu, Zn, and Mn were similar across treatments. In experiment 4, four-hundred cross-bred steers (initial BW 335 ± 9.6 kg) were utilized to investigate the effects of supplemental Zn, Cu, and Mn concentration and source on… Advisors/Committee Members: Engle, Terry E. (advisor), Wagner, John J. (committee member), Archibeque, Shawn L. (committee member), Rollin, Bernard (committee member).

Subjects/Keywords: cattle; manganese; beef; zinc; copper

2 more images…

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APA (6^th Edition):

Caldera, E. (2015). Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/166925

Chicago Manual of Style (16^th Edition):

Caldera, Emmanuel. “Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese.” 2015. Doctoral Dissertation, Colorado State University. Accessed March 07, 2021. http://hdl.handle.net/10217/166925.

MLA Handbook (7^th Edition):

Caldera, Emmanuel. “Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese.” 2015. Web. 07 Mar 2021.

Vancouver:

Caldera E. Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese. [Internet] [Doctoral dissertation]. Colorado State University; 2015. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10217/166925.

Council of Science Editors:

Caldera E. Examining in vitro and in vivo characteristics of Intellibond and sulfate forms of copper, zinc, and manganese. [Doctoral Dissertation]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/166925

Texas A&M University

26. Lee, Bo Yeon. Action of manganese on puberty.

Degree: PhD, Toxicology, 2007, Texas A&M University

URL: http://hdl.handle.net/1969.1/5871

► Manganese (Mn) is considered important for normal growth and reproduction. Because Mn can cross the blood brain barrier and accumulate in the hypothalamus, and because… (more)

▼ Manganese (Mn) is considered important for normal growth and reproduction. Because Mn can cross the blood brain barrier and accumulate in the hypothalamus, and because it has been suggested that infants and children are potentially more sensitive to Mn than adults, we wanted to determine the effects of Mn exposure on puberty-related hormones and the onset of puberty, and discern the site and mechanism of Mn action. We demonstrated that the central administration of manganese chloride (MnCl2) stimulated luteinizing hormone (LH) release in prepubertal rats. Incubation of medial basal hypothalamus (MBH) in vitro showed this effect was due to a Mn-induced stimulation of luteinizing hormone releasing hormone (LHRH). Further demonstration that this is a hypothalamic site of action was shown by in vivo blockade of LHRH receptors and the lack of a direct pituitary action of Mn to stimulate LH release in vitro. Chronic supplementation of low dose of MnCl2 caused elevated serum levels of LH, follicle stimulating hormone (FSH) and estradiol or testosterone. Importantly, Mn supplementation advanced the timing of puberty in both sexes. We investigated the mechanism by which Mn induces LHRH/LH release from the hypothalamus. Blocking the NMDA receptor, IGF1 receptor, or inhibiting nitric oxide synthase in vivo was ineffective in altering Mn-induced LH release. Dose-response, pharmacological blockade and nitrite assessments indicated that the lowest doses of Mn used stimulated LHRH release, but did not induce nitric oxide (NO) production, while only the highest dose of Mn stimulated NO. Conversely, a dose-dependent inhibition of Mn-induced LHRH release was observed in the presence of ODQ, a specific blocker of soluble guanylyl cyclase. Furthermore, Mn stimulated the release of cyclic GMP (cGMP) and LHRH from the same MBH, and a protein kinase G (PKG) inhibitor, KT5823, blocked Mn-induced LHRH release. Collectively, these data demonstrate that Mn can stimulate specific puberty-related hormones both acutely and chronically, and furthermore, suggest that low levels of Mn facilitate the normal onset of puberty. The principal action of Mn within the hypothalamus is to facilitate the activation of guanylyl cyclase, which subsequently stimulates the cGMP/PKG pathway resulting in the stimulation of prepubertal LHRH secretion. Advisors/Committee Members: Dees, William Les (advisor), Bratton, Gerald R. (committee member), Porter, Weston William (committee member), Ramaiah, Shashi (committee member).

Subjects/Keywords: Manganese; Puberty

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APA (6^th Edition):

Lee, B. Y. (2007). Action of manganese on puberty. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/5871

Chicago Manual of Style (16^th Edition):

Lee, Bo Yeon. “Action of manganese on puberty.” 2007. Doctoral Dissertation, Texas A&M University. Accessed March 07, 2021. http://hdl.handle.net/1969.1/5871.

MLA Handbook (7^th Edition):

Lee, Bo Yeon. “Action of manganese on puberty.” 2007. Web. 07 Mar 2021.

Vancouver:

Lee BY. Action of manganese on puberty. [Internet] [Doctoral dissertation]. Texas A&M University; 2007. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1969.1/5871.

Council of Science Editors:

Lee BY. Action of manganese on puberty. [Doctoral Dissertation]. Texas A&M University; 2007. Available from: http://hdl.handle.net/1969.1/5871

University of Newcastle

27. Bailey, Mark Robert. Improving energy efficiency in the manganese dioxide cathode.

Degree: PhD, 2014, University of Newcastle

URL: http://hdl.handle.net/1959.13/1044991

►

Research Doctorate - Doctor of Philosophy (PhD)

In this thesis the relationship between the physico-chemical properties of manganese dioxide and its electrochemical behaviour has been… (more)

▼

Research Doctorate - Doctor of Philosophy (PhD)

In this thesis the relationship between the physico-chemical properties of manganese dioxide and its electrochemical behaviour has been investigated with the aim to improve the rechargeability of the alkaline Zn/MnO2 system. The project work was carried out in two broad areas, the first focusing on fundamental electrochemical and structural studies of γ-MnO2, and the second investigating the role of Ti(IV) and Ba(II) additives in improving cathode cyclability. The electrochemical and structural studies revealed that regardless of initial material properties, the capacity loss in γ-MnO2 during cycling can be primarily assigned to the lower potential (pyrolusite) region. To understand the underlying cause of this capacity loss, heat treatment of γ-MnO2 was used to prepare a structural series of material with increasing pyrolusite content. These studies revealed that heat treatment resulted in materials less able to accommodate proton insertion, with these materials expanding to a greater degree upon reduction and thus being more susceptible to mechanical breakdown. Electrochemical cycling revealed that as the pyrolusite content increases beyond 0.5, these changes act to destabilise the entire structure and result in material failure. The first section was brought to conclusion through the electrochemical characterisation of proton diffusion, calculated as A√D values, during the discharge and cycling of a standard γ-MnO2 material. This was achieved by the application of an appropriate model to the electrode response during step potential electrochemical spectroscopy (SPECS) and electrochemical impedance spectroscopy (EIS) experiments. By comparing the penetration depth of protons during these experiments with the nanostructure of the material, imaged via high-resolution transmission electron microscopy, it was shown that A√D values determined via SPECS represent the movement of protons through the bulk of the material, whereas EIS values focus on diffusion localised at the surface (penetrating <1 nm into the material). In this manner, each set of values provided key insights into different aspects of the material: the SPECS results suggestive of a reasonable degree of stability in the bulk of the material, and the EIS results indicative of significant degradation of the surface resulting from dissolution processes. The thesis then shifts its focus to understanding the role of Ti(IV) and Ba(II) additives in improving cathode cyclability. Electrochemical studies revealed that the inclusion of titanium dioxide improves electrode performance by lowering the resistance to charge transfer at the γ-MnO2 particle surface. A consideration of proton diffusivity in the presence of titanium dioxide indicated that Ti(IV) also becomes incorporated into the bulk γ-MnO2 structure upon cycling. The association of Ti(IV) with the particle surface and its incorporation into the bulk structure were confirmed through via imaging and depth profiling carried out using time-of-flight secondary…

Advisors/Committee Members: University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Sciences.

Subjects/Keywords: electrochemistry; manganese dioxide; battery materials

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APA (6^th Edition):

Bailey, M. R. (2014). Improving energy efficiency in the manganese dioxide cathode. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1044991

Chicago Manual of Style (16^th Edition):

Bailey, Mark Robert. “Improving energy efficiency in the manganese dioxide cathode.” 2014. Doctoral Dissertation, University of Newcastle. Accessed March 07, 2021. http://hdl.handle.net/1959.13/1044991.

MLA Handbook (7^th Edition):

Bailey, Mark Robert. “Improving energy efficiency in the manganese dioxide cathode.” 2014. Web. 07 Mar 2021.

Vancouver:

Bailey MR. Improving energy efficiency in the manganese dioxide cathode. [Internet] [Doctoral dissertation]. University of Newcastle; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1959.13/1044991.

Council of Science Editors:

Bailey MR. Improving energy efficiency in the manganese dioxide cathode. [Doctoral Dissertation]. University of Newcastle; 2014. Available from: http://hdl.handle.net/1959.13/1044991

University of Wollongong

28. Hejazi, Daniel. Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement.

Degree: Doctor of Philosophy, 2014, University of Wollongong

URL: ; https://ro.uow.edu.au/theses/4275

► A wide range of ferrite-based microstructures were produced for high strength pipeline steels with standard X70 (1.2 wt.%) and lowered MX70 (0.5wt.%) Mn content.… (more)

▼ A wide range of ferrite-based microstructures were produced for high strength pipeline steels with standard X70 (1.2 wt.%) and lowered MX70 (0.5wt.%) Mn content. These include as-processed X70 and MX70 strips, as well as X70 transfer bar in the asprocessed and normalised conditions. In addition, simulated coarse grain heat affected zone (CGHAZ) microstructures were produced. The main objective of the research was to establish and rationalise the differences in hydrogen pick-up and susceptibility to hydrogen embrittlement (HE), both under three point bending (TPB) of notched hydrogen-charged samples and tensile testing of tubular samples pressurized with hydrogen. A particular concern was whether the susceptibility to hydrogen induced cracking (HIC) was compromised by design of a lower Mn steel meeting X70 mechanical property specifications. The effects of electrolytic hydrogen charging on surface and internal damage, as well as fracture toughness, were studied in relation to grain size, microstructure, composition and the type and distribution of non-metallic inclusions and precipitates. The X70 steel consistently exhibited higher J_Q fracture toughness values (derived from TPB tests) than the MX70 strip, both before and after hydrogen charging. Electrolytic hydrogen charging experiments on thin strip samples (about 1 mm thick) indicated that the most rapid formation of surface blisters and HIC occurred for the banded ferrite-pearlite microstructures of the as-processed strip, followed by equiaxed TB ferritepearlite microstructure in the normalised condition, and then by the as-received TB sample with a ferrite-bainite microstructure, no blistering was observed in the heat affected zone (HAZ) samples for up to 24 hours charging. In terms of measured diffusible hydrogen content after charging, the equiaxed (normalised) microstructure showed the lowest diffusible hydrogen content, followed by the banded ferrite-pearlite microstructures, the quasi-polygonal ferrite with bainite microstructure and finally the HAZ samples. In relation to residual hydrogen monitored after its release from stronger traps, the HAZ microstructures exhibited the lowest hydrogen content; followed by the equiaxed (normalized TB) microstructure; the quasi-polygonal ferrite and bainite microstructure of the as-received TB; and the banded ferritepearlite microstructures of the as-received strip steels. HIC in these charged samples often initiated from oxide particles and propagated mainly along intragranular paths,…

Subjects/Keywords: pipeline; hydrogen; steel; manganese

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APA (6^th Edition):

Hejazi, D. (2014). Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement. (Doctoral Dissertation). University of Wollongong. Retrieved from ; https://ro.uow.edu.au/theses/4275

Chicago Manual of Style (16^th Edition):

Hejazi, Daniel. “Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement.” 2014. Doctoral Dissertation, University of Wollongong. Accessed March 07, 2021. ; https://ro.uow.edu.au/theses/4275.

MLA Handbook (7^th Edition):

Hejazi, Daniel. “Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement.” 2014. Web. 07 Mar 2021.

Vancouver:

Hejazi D. Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement. [Internet] [Doctoral dissertation]. University of Wollongong; 2014. [cited 2021 Mar 07]. Available from: ; https://ro.uow.edu.au/theses/4275.

Council of Science Editors:

Hejazi D. Effect of manganese content and microstructure on the susceptibility of x70 pipeline steel to hydrogen embrittlement. [Doctoral Dissertation]. University of Wollongong; 2014. Available from: ; https://ro.uow.edu.au/theses/4275

Oregon State University

29. Glibert, Kenneth Malcolm. Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51.

Degree: PhD, Physics, 1965, Oregon State University

URL: http://hdl.handle.net/1957/47588

► The decay scheme of Mn⁵¹ has been investigated using gamma-ray and beta-ray scintillation spectrometers and a fast coincidence spectrometer. A half-life value of 46.5 ±… (more)

Subjects/Keywords: Manganese – Spectra

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APA (6^th Edition):

Glibert, K. M. (1965). Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/47588

Chicago Manual of Style (16^th Edition):

Glibert, Kenneth Malcolm. “Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51.” 1965. Doctoral Dissertation, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/47588.

MLA Handbook (7^th Edition):

Glibert, Kenneth Malcolm. “Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51.” 1965. Web. 07 Mar 2021.

Vancouver:

Glibert KM. Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51. [Internet] [Doctoral dissertation]. Oregon State University; 1965. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/47588.

Council of Science Editors:

Glibert KM. Gamma- and beta-ray spectroscopy studies of the radioactive decay of Mn-51 to Cr-51. [Doctoral Dissertation]. Oregon State University; 1965. Available from: http://hdl.handle.net/1957/47588

Oregon State University

30. Yee, Kelsey L. The role of manganese peroxidase in biomass conversion technologies.

Degree: PhD, Chemical Engineering, 2010, Oregon State University

URL: http://hdl.handle.net/1957/17700

► Currently, the technologies used to separate lignocellulosic biomass into its component parts (cellulose, hemicellulose, and lignin) and enzymatically hydrolyze the cellulose to glucose for conversion… (more)

▼ Currently, the technologies used to separate lignocellulosic biomass into its component parts (cellulose, hemicellulose, and lignin) and enzymatically hydrolyze the cellulose to glucose for conversion to ethanol could be improved economically and in terms of efficiency. A major impediment to utilizing the biomass is the presence of residual lignin. The residual lignin "poisons" the cellulase enzymes and as a result, a lower glucose yield is obtained. A higher titer of cellulases could be used to increase the yield of glucose, but cellulases are expensive. A possibility to reduce the cost of cellulase enzymes and improve the efficiency, economics, extent and/or rate of hydrolysis is to use lignin-degrading fungal heme peroxidase such as manganese peroxidases. An efficient and economical glucose assay was developed to monitor the rate and extent of enzymatic hydrolysis of cellulose. The glucose assay is based on the glucose oxidase horseradish peroxidase enzymatic method, but uses bulk enzymes making it more economical than commercial kits. The glucose assay also has a higher throughput rate and is more economical than HPLC. In order to evaluate possible synergistic effects between cellulases and manganese peroxidase (MnP), rMnP was produced in high cell density fed-batch cultivations by the genetically engineered yeast, P. pastoris. In addition, a mathematic model was developed to describe the temperature dependant growth of P. pastoris and consumption of glucose and the production and temperature dependent degradation of rMnP in the bioreactor broth. The model successfully predicted the cell growth, substrate consumption, and rMnP production for the base case and also for cultivations with varying fed-batch air flow rates (k[subscript L]a) and temperatures. The production of rMnP requires cultures amended with exogenous heme and there are several sources of heme. Through shake flask experiments and bioreactor cultivations it was determined that 0.1 g/L of heme was necessary for producing high titers of rMnP (4,500 U/L). It was also determined that not all types of heme will yield the same rMnP titer. The water soluble fraction post pretreatment of lignocellulosic biomass contains inhibitors to fermentation such as 5-hydroxymethyl furfural (HMF) and furfural. rMnP was shown to degrade HMF (1 g/L) and furfural (1 g/L) and detoxify medium containing these inhibitors. The rMnP reduced furfural and HMF, measured by absorbance at 276 and 286 nm respectively and the degree of absorbance decrease was dependent on rMnP concentration. Furfural was more readily degraded by rMnP than HMF. Growth assays using S. cerevisiae indicated rMnP treatment detoxified medium containing furfural and HMF. The optimal conditions (temperature, pH, and buffer) for enzyme activity were determined for both AccelleraseTM 1000 (commercially available combination of cellulases) and rMnP using filter paper as a substrate. Woody biomass and corn stover were pretreated and then exposed to simultaneous or… Advisors/Committee Members: Kelly, Christine J. (advisor), Lajoie, Curtis (committee member).

Subjects/Keywords: Manganese Peroxidase; Biomass conversion

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APA (6^th Edition):

Yee, K. L. (2010). The role of manganese peroxidase in biomass conversion technologies. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/17700

Chicago Manual of Style (16^th Edition):

Yee, Kelsey L. “The role of manganese peroxidase in biomass conversion technologies.” 2010. Doctoral Dissertation, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/17700.

MLA Handbook (7^th Edition):

Yee, Kelsey L. “The role of manganese peroxidase in biomass conversion technologies.” 2010. Web. 07 Mar 2021.

Vancouver:

Yee KL. The role of manganese peroxidase in biomass conversion technologies. [Internet] [Doctoral dissertation]. Oregon State University; 2010. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/17700.

Council of Science Editors:

Yee KL. The role of manganese peroxidase in biomass conversion technologies. [Doctoral Dissertation]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/17700

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