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Oklahoma State University
1.
Wilkins, Jerod Laurence.
Automated Rapid Particle Investigation Using Scanning Electron Microscopy.
Degree: Civil & Environmental Engineering, 2013, Oklahoma State University
URL: http://hdl.handle.net/11244/15187 
► The chemical composition of fly ash particles has been known to vary significantly depending on a number of factors. Current bulk methods of investigation including…
(more)
▼ The chemical composition of fly
ash particles has been known to vary significantly depending on a number of factors. Current bulk methods of investigation including X-Ray Fluorescence and X-Ray Diffraction are thought to be inadequate in determining the performance of fly
ash in concrete. It is the goal of this research to develop a method of Automated Rapid Particle Investigation that will not look at fly
ash as a bulk material but as individual particles. By examining each particle individually scientists and engineers will have the ability to study the variation in chemical composition by comparing the chemistry present in each particle. The method of investigation developed by this research provides a practical technique that will allow the automated chemical analysis of hundreds, or even thousands, of fly
ash particles in a matter of minutes upon completion of sample preparation and automated scanning electron microscope (ASEM) scanning. This research does not examine the significance of the chemical compounds discovered; rather, only the investigation methodology is discussed. Further research will be done to examine the importance of the chemistry discovered with this automated rapid particle investigation technique.
Advisors/Committee Members: Ley, Tyler (advisor), Russell, Bruce (committee member), Cross, Stephen (committee member).
Subjects/Keywords: fly ash
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APA (6th Edition):
Wilkins, J. L. (2013). Automated Rapid Particle Investigation Using Scanning Electron Microscopy. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/15187
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):
Wilkins, Jerod Laurence. “Automated Rapid Particle Investigation Using Scanning Electron Microscopy.” 2013. Thesis, Oklahoma State University. Accessed April 12, 2021.
http://hdl.handle.net/11244/15187.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wilkins, Jerod Laurence. “Automated Rapid Particle Investigation Using Scanning Electron Microscopy.” 2013. Web. 12 Apr 2021.
Vancouver:
Wilkins JL. Automated Rapid Particle Investigation Using Scanning Electron Microscopy. [Internet] [Thesis]. Oklahoma State University; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11244/15187.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wilkins JL. Automated Rapid Particle Investigation Using Scanning Electron Microscopy. [Thesis]. Oklahoma State University; 2013. Available from: http://hdl.handle.net/11244/15187
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Macquarie University
2.
Safa, Zahra Khamseh.
Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates.
Degree: 2017, Macquarie University
URL: http://hdl.handle.net/1959.14/1277795
► Theoretical thesis.
Bibliography: pages 227-237
Chapter 1. Introduction to biosorbents and coal fly ash – Chapter 2. Leaching properties of fly ash – Chapter 3.…
(more)
▼ Theoretical thesis.
Bibliography: pages 227-237
Chapter 1. Introduction to biosorbents and coal fly ash – Chapter 2. Leaching properties of fly ash – Chapter 3. Evaluation of tree barks as a biosorbent for As(V) – Chapter 4. Assessing tree barks as a Se biosorbent – Chapter 5. Conclusion and future directions.
Coal fly ash is generated during the combustion of coal for energy production in thermal power plants. Approximately more than 50% worldwide of all coal fly ashes is either stored in stockpiles, or disposed in ash landfills or lagoons. Fly ash is recognised as an environmental contaminants because of its high concentration of trace elements, such as As and Se, and the potential for leaching these elements into the wider environment. Several methods, excluding biosorption have already been reported for elemental removal from fly ash. Biosorbents, which refer to a group of compounds derived from the inactive, dead or microbial biomass, have the capacity to bind and potential utility in removing trace elements from wastewater systems. Tree bark as non-living biomass materials, contain proteins, carbohydrates and phenolic compounds, which can provide a wide variety of ion exchange sites. Additionally, tree barks as an environmentally friendly low cost biosorbents are readilyavailable, renewable resource with a large surface area, andable to potentially regenerateformetal recovery.In this study, the feasibilityof using the outer layer of selected tree barks as biosorbents for removing the most abundantarsenic and selenium speciation, arsenic(V) and selenium(IV), from fly ash leachate was investigated, and the results reveal that the selected tree barks are well effective for specified biosorption. In the beginning, three class F fly ash samples, including two acidic and one alkaline samples, have been assessed to characterise their physical(pH, moisture%, Brunauer-Emmett-Teller (BET)surface area and percentage of loss on ignition (LOI%)), chemical(major and minor elements)and morphological properties. Additionally, we have performed in this study a selection of leaching experiments under variableconditions (pH: 4, 7 and 11, solid: liquid ratios of 1:3.5 and 1:10, and contact time1 and 24 h) in order to determine the amount of As(V) and iiiSe(IV) present in fly ash leachates. Acidic fly ashes were found to release nearly 10% of As, twice the corresponding level in the alkaline fly ash leachate, whilst more than 50% of Se was removable from alkaline fly ash, nearly 10-fold the level in acidic fly ash leachate. Leaching experiments determined that fly ashes would tend to maintain its natural pH level regardless of the initial pH of the solutions used in leaching test. However,the initial pH exhibiteda major but variable effect on As(V) and Se(IV) mobility. Themobility of both As(V) and Se(IV) at a lower solid-to-liquid ratio of 1: 10 was found to be reduced by half in some cases. Nonetheless, during the early stage of leaching, As(V) and Se(IV) were quickly removed from enriched fine particles with…
Advisors/Committee Members: Macquarie University. Department of Chemistry and Biomolecular Sciences.
Subjects/Keywords: Fly ash; Coal ash; Coal ash industry; coal ash; fly ash; tree barks; biosorbents
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APA (6th Edition):
Safa, Z. K. (2017). Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates. (Doctoral Dissertation). Macquarie University. Retrieved from http://hdl.handle.net/1959.14/1277795
Chicago Manual of Style (16th Edition):
Safa, Zahra Khamseh. “Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates.” 2017. Doctoral Dissertation, Macquarie University. Accessed April 12, 2021.
http://hdl.handle.net/1959.14/1277795.
MLA Handbook (7th Edition):
Safa, Zahra Khamseh. “Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates.” 2017. Web. 12 Apr 2021.
Vancouver:
Safa ZK. Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates. [Internet] [Doctoral dissertation]. Macquarie University; 2017. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1959.14/1277795.
Council of Science Editors:
Safa ZK. Application of tree barks to the removal of arsenic(V) and selenium(IV) species from coal fly ash leachates. [Doctoral Dissertation]. Macquarie University; 2017. Available from: http://hdl.handle.net/1959.14/1277795
University of Utah
3.
Caton, Jasmin Chamney.
Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah.
Degree: MS;, Geology & Geophysics;, 2008, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1808/rec/423
► Stable isotope variations in laminated tufa deposits have provided valuable archives of paleoenvironmental conditions; however few detailed investigations on how specific environmental variables are integrated…
(more)
▼ Stable isotope variations in laminated tufa deposits have provided valuable archives of paleoenvironmental conditions; however few detailed investigations on how specific environmental variables are integrated into a tufa's isotopic signal have been completed. To better understand environmental controls on tufa isotopic composition in Red Butte Canyon, Utah, one year of geochemical monitoring of the tufa-bearing stream Parley's Fork, groundwater and carbonate collected on artificial substrate was performed. Seasonal variations in temperature, Mg/Ca and Sr/Ca in the stream were not captured in the Mg/Ca or Sr/Ca of the temporally corresponding carbonate. Degassing of CO2 from the stream, possibly by ebullition of gas bubbles, is the most important process leading to tufa deposition, compared to temperature changes and biological activity. Equilibrium fractionation from stream DIC accounts for the delta 13 C of tile calcites during the summer and early fall, but in the winter and spring tile calcites are more enriched, possibly due to the microenvironmental influence of photosynthetic organisms. Seasonal variations of delta 18 O in Parley's Fork are correlated with stream discharge, and temperature dependent equilibrium fractionation appears to account for the observed variations in tile calcite delta 18 O. Based on these observations, periods of enriched delta 13 C and delta 18 O in tufa laminae likely correspond to cool or wet climatic intervals. Stable isotope and trace element analysis and radiocarbon dating was completed on two tufa specimens collected from Parley's Fork. The largest tufa specimen spanned the time interval from A.D. 990 to 1990. Evidence of the past 150 years of fossil fuel emission induced changes to the delta 13 C of the atmosphere exists in the tufa delta 13 C signature. The Little Ice Age (1600 to 1800) portion of the tufa displays large oscillations in isotopic composition, possibly indicating numerous rapid (decade-scale) shifts in local climate. In the early part of the last millennium, suppressed isotopic variations appear to correspond with significant drought events. The Medieval Warm Period (800 to 1200) is evidenced by a distinct change to lighter values of delta 13 C and delta 18 O, and a corresponding decrease in the Mg/Ca and Sr/Ca ratios.
Subjects/Keywords: Volcanic ash; Paleoecology
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APA (6th Edition):
Caton, J. C. (2008). Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1808/rec/423
Chicago Manual of Style (16th Edition):
Caton, Jasmin Chamney. “Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah.” 2008. Masters Thesis, University of Utah. Accessed April 12, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1808/rec/423.
MLA Handbook (7th Edition):
Caton, Jasmin Chamney. “Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah.” 2008. Web. 12 Apr 2021.
Vancouver:
Caton JC. Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah. [Internet] [Masters thesis]. University of Utah; 2008. [cited 2021 Apr 12].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1808/rec/423.
Council of Science Editors:
Caton JC. Environmental controls on the formation and isotopic composition of a laminated tufa in Red Butte Canyon, Utah. [Masters Thesis]. University of Utah; 2008. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1808/rec/423
Michigan State University
4.
Ellison, Dana Suzanne.
Pre-plant storage and handling of difficult to transplant ash alternatives.
Degree: 2012, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:400
► Thesis M.S. Michigan State University. Horticulture 2012.
The loss of ash (Fraxinus spp.) trees in the midwestern United States due to emerald ash borer has…
(more)
▼ Thesis M.S. Michigan State University. Horticulture 2012.
The loss of ash (Fraxinus spp.) trees in the midwestern United States due to emerald ash borer has emphasized the need for more diversity in urban and community forests. However, nursery growers report that many Fraxinus spp. alternatives are difficult to transplant. Understanding the physiological reasons why one tree species has superior transplantability over another is an important factor in increasing production of Fraxinus spp. replacements. In this study, we examined five difficult to transplant ash alternatives; Celtis occidentalis, Quercus bicolor, Quercus ellipsoidalis, Quercus rubra, Taxodium distichum, and Fraxinus americana. To mimic nursery grower practices, trees were assigned at random to one of four treatments: 1) control, 2) heeled–in, 3) cold storage, or 4) sweating. After treatment, trees were assigned at random to one of three evaluations: root growth potential (RGP) test, container planting or field planting. Root growth potential was very low for Quercus spp. trees and varied by treatment for C. occidentalis. Taxodium distichum trees had a relatively high root growth potential in all treatments. Stem water potential measured immediately before and after pre–plant treatments suggest that Quercus spp. trees and T. distichum trees were able to rehydrate during sweating while water stress levels in C. occidentalis trees remained high. The results suggest that poor transplanting success reported for Quercus spp. trees may be related to low root growth potential, whereas poor success of C. occidentalis trees may be due to shoot desiccation during storage and handling.
Description based on online resource; title from PDF t.p. (ProQuest, viewed Oct. 28, 2013)
Advisors/Committee Members: Cregg, Bert, Schutzki, Robert, Nzokou, Pascal.
Subjects/Keywords: Ash (Plants) – Transplanting; Ash (Plants) – Seedlings – Evaluation; Ash (Plants) – Growth; Emerald ash borer; Horticulture
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APA (6th Edition):
Ellison, D. S. (2012). Pre-plant storage and handling of difficult to transplant ash alternatives. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:400
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):
Ellison, Dana Suzanne. “Pre-plant storage and handling of difficult to transplant ash alternatives.” 2012. Thesis, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:400.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ellison, Dana Suzanne. “Pre-plant storage and handling of difficult to transplant ash alternatives.” 2012. Web. 12 Apr 2021.
Vancouver:
Ellison DS. Pre-plant storage and handling of difficult to transplant ash alternatives. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:400.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ellison DS. Pre-plant storage and handling of difficult to transplant ash alternatives. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:400
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Michigan State University
5.
Robinett, Molly A.
White ash survival in the core of the emerald ash borer invasion area.
Degree: 2017, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:6941
► The invasive emerald ash borer (EAB); (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae), a secondary pest of stressed or declining ash (Fraxinus) trees in its native Asia,…
(more)
▼ The invasive emerald
ash borer (EAB); (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae), a secondary pest of stressed or declining
ash (Fraxinus) trees in its native Asia, is the most destructive forest insect to ever invade North America. Since its arrival in the Detroit metropolitan area in the early 1990’s, EAB has established in 31 states and three Canadian provinces. To date, hundreds of millions of
ash trees have been killed and nearly 8 billion trees are threatened in U.S. forests. While all North American
ash species are susceptible to EAB, white
ash (Fraxinus americana L.) appears to be an intermediate host that is not highly preferred, but still becomes infested and succumbs. Catastrophic levels of
ash mortality, ranging from 80% to 99% of stems, were recorded in forested sites located in southeast Michigan and Ohio. Despite these reports, we have observed an unexpectedly high proportion of overstory white
ash trees alive in southeast and south central Michigan with the longest history of EAB infestation. To quantify this survival, I intensively surveyed 28 sites in this region. I recorded 821 white
ash trees ≥ 10 cm (DBH) in fixed radius plots (18 m) in a 1 ha site. Most (75%) white
ash stems are alive and in good condition. More than half (68%) of the live white
ash trees had external bark cracks left from previous EAB larval feeding, however, 91% of these trees recovered. In contrast, 95% of the 373 green
ash (F. pennsylvanica Marsh.) trees recorded in the 28 sites are dead. This supports findings from previous plantation and urban
ash tree studies reporting the preference of green
ash trees over white
ash trees where they co-occur. Stand-level variables that could predict the percentage of white
ash stems and basal area alive were evaluated. White
ash stem density and distance from sites to the EAB origin were positively related to white
ash survival, while total basal area of all overstory species and white
ash were negatively related to white
ash survival. Density of white
ash stems and distance from sites to the EAB origin were positively related to the proportion of white
ash basal area alive. White
ash basal area averaged 1.5 ± 0.2 m2·ha–1, and ranged from 0.3 to 3.5 m2·ha–1 within sites, totaling 42.7 m2·ha–1 across sites. I also tallied regeneration and found white
ash accounted for 64%, 79%, and 74% of the total recruits, saplings, and seedlings recorded across the 28 sites. Given the impact and ongoing spread of this highly destructive pest, effective monitoring techniques are critical. I established two double decker (DD) trap types in 30 post-invasion sites located in the EAB origin in 2014, 2015, and 2016; one DD comprised of a dark green upper prism and a light purple lower prism (PG) baited with cis-3-hexanol, and one DD comprised of a dark purple prism on top and bottom (PP) baited with cis-3-hexanol and Manuka oil. A total of 580, 585, and 932 EAB adults were captured in 2014, 2015, and 2016, respectively. The PG trap captured significantly more EAB adults than the PP trap.…
Advisors/Committee Members: McCullough, Deborah G., Montgomery, Robert A., Rothstein, David E., Poland, Therese M..
Subjects/Keywords: White ash – Mortality – Mathematical models; White ash – Diseases and pests – Michigan; White ash – Mortality – Michigan; Emerald ash borer – Michigan; White ash – Diseases and pests; Emerald ash borer; Ecology
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APA (6th Edition):
Robinett, M. A. (2017). White ash survival in the core of the emerald ash borer invasion area. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:6941
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):
Robinett, Molly A. “White ash survival in the core of the emerald ash borer invasion area.” 2017. Thesis, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:6941.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Robinett, Molly A. “White ash survival in the core of the emerald ash borer invasion area.” 2017. Web. 12 Apr 2021.
Vancouver:
Robinett MA. White ash survival in the core of the emerald ash borer invasion area. [Internet] [Thesis]. Michigan State University; 2017. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:6941.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Robinett MA. White ash survival in the core of the emerald ash borer invasion area. [Thesis]. Michigan State University; 2017. Available from: http://etd.lib.msu.edu/islandora/object/etd:6941
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Louisville
6.
Pfeiffer, Jack Anthony.
Coal ash exposure and asthma in children.
Degree: MS, 2017, University of Louisville
URL: 10.18297/etd/2806
;
https://ir.library.louisville.edu/etd/2806
► This study examined the association between exposure to coal ash in the home among children aged 6-14 and asthma. Data was collected using personal…
(more)
▼ This study examined the association between exposure to coal
ash in the home among children aged 6-14 and asthma. Data was collected using personal modular impactors, lift tape samples, toe/finger nail samples, questionnaires, and peak flow meters. Laboratory methods used to analyze the samples included gravimetric analysis, scanning electron microscopy (SEM) / energy dispersive x-ray (EDX), and proton-induced x-ray emission (PIXE). Statistical methods used to analyze the data included the Chi Square Test of Independence, logistic regression, the Hosmer-Lemeshow Goodness of Fit test, Fisher’s Exact Test, and the Anderson-Darling Normality Test. Sample size was small, making statistical significance in calculated values unachievable. Though statistical results were not significant, it was suggested that a relationship between asthma risk and exposure was possible. In particular, it was noted that male participants averaged lower peak flow values when compared to the pediatric norm. It was also noted that mean residential distances from the studied power plants were lower in asthma cases than for non-asthma cases. Although results are preliminary and findings were inconsistent, asthma prevalence within the study group was high, compared to the national average in children and requires further study.
Advisors/Committee Members: Zierold, Kristina, Baumgartner, Kathy, Baumgartner, Kathy, Lorenz, Douglas, Hanchette, Carol.
Subjects/Keywords: fly ash; coal fly ash and asthma; coal fly ash and children; Epidemiology
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APA (6th Edition):
Pfeiffer, J. A. (2017). Coal ash exposure and asthma in children. (Masters Thesis). University of Louisville. Retrieved from 10.18297/etd/2806 ; https://ir.library.louisville.edu/etd/2806
Chicago Manual of Style (16th Edition):
Pfeiffer, Jack Anthony. “Coal ash exposure and asthma in children.” 2017. Masters Thesis, University of Louisville. Accessed April 12, 2021.
10.18297/etd/2806 ; https://ir.library.louisville.edu/etd/2806.
MLA Handbook (7th Edition):
Pfeiffer, Jack Anthony. “Coal ash exposure and asthma in children.” 2017. Web. 12 Apr 2021.
Vancouver:
Pfeiffer JA. Coal ash exposure and asthma in children. [Internet] [Masters thesis]. University of Louisville; 2017. [cited 2021 Apr 12].
Available from: 10.18297/etd/2806 ; https://ir.library.louisville.edu/etd/2806.
Council of Science Editors:
Pfeiffer JA. Coal ash exposure and asthma in children. [Masters Thesis]. University of Louisville; 2017. Available from: 10.18297/etd/2806 ; https://ir.library.louisville.edu/etd/2806
Michigan Technological University
7.
Stimmel, Elisabeth.
THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS.
Degree: MS, College of Forest Resources and Environmental Science, 2020, Michigan Technological University
URL: https://digitalcommons.mtu.edu/etdr/1063
► Black ash (Fraxinus nigra Marshall) wetlands are at risk of significant ecological and functional changes due to the invasive emerald ash borer (EAB) (Agrilus…
(more)
▼ Black
ash (
Fraxinus nigra Marshall) wetlands are at risk of significant ecological and functional changes due to the invasive emerald
ash borer (EAB) (
Agrilus planipennis Fairmaire (Coleoptera: Buprestidae)), which kills trees in the
Fraxinus (
ash) genus. Simulated EAB infestations consisting of girdle treatments and
ash cut treatments have been implemented in black
ash wetlands to study the impacts of black
ash canopy dieoff in these systems. Initial findings include ground layer vegetation shifts and impacts to carbon dioxide (CO
2) and methane (CH
4) release from soils, but these factors and their interactions with microtopography in these systems are not well understood. The objectives of this study were to explore how vegetation and greenhouse gas fluxes (GHGs) are currently responding to simulated EAB treatments in the Ottawa National Forest in the Great Lakes Region of North America six years after initial treatment implementation, and to determine how microtopography affects them as well.
Tree seedling counts and diversity were not found to be affected by treatments alone. Microtopography, however, had a larger impact and showed more seedlings and a higher diversity of seedlings growing on hummocks. Seedlings over one year of age were also found in greater numbers and with more diversity on top of hummocks. Herbaceous species have continued their trend of increased cover in treated sites, with higher cover of obligate wetland species and graminoids in treated sites as well. Increased herbaceous cover was found on top of hummocks rather than in hollows. These findings suggest that herbaceous cover is influenced by both treatments and microtopography, while tree regeneration is more influenced by microtopography. The implications of the lack of response between treatments for seedlings is that the increase in water levels at our wetland sites may be buffered by microtopography and our sites could continue to stay forested following an EAB infestation.
CO
2 and CH
4 fluxes showed different responses to treatment and microtopography. CO
2 flux was highest in control sites and on top of hummocks, while CH
4 was not found to be different between treatments or microtopography. The postulated reasons for these findings are depth to water table and root respiration. For CO
2, the lower water levels allowed for more soil to be aerated and decomposed, and there is more root respiration in control sites because of a higher volume of living trees. For CH
4, the low water levels created an environment where little CH4 was produced at all. When landscape-scale estimates of GHG fluxes were created using weighted fluxes from hummocks and hollows, CO
2 fluxes were overestimated and CH
4 fluxed were underestimated when the elevation-based flux differences due to microtopography were not factored in. These findings suggest that microtopography should be included when scaling up gas flux…
Advisors/Committee Members: Fengjing Liu.
Subjects/Keywords: Forest Wetland; Black Ash; Emerald Ash Borer; Wetland; Black Ash Wetland; Forest Management
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APA (6th Edition):
Stimmel, E. (2020). THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/1063
Chicago Manual of Style (16th Edition):
Stimmel, Elisabeth. “THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS.” 2020. Masters Thesis, Michigan Technological University. Accessed April 12, 2021.
https://digitalcommons.mtu.edu/etdr/1063.
MLA Handbook (7th Edition):
Stimmel, Elisabeth. “THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS.” 2020. Web. 12 Apr 2021.
Vancouver:
Stimmel E. THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS. [Internet] [Masters thesis]. Michigan Technological University; 2020. [cited 2021 Apr 12].
Available from: https://digitalcommons.mtu.edu/etdr/1063.
Council of Science Editors:
Stimmel E. THE INTERACTIVE EFFECTS OF MICROTOPOGRAPHY AND HYDROLOGY ON GROUND LAYER VEGETATION AND SOIL GAS FLUX RESPONSES TO A SIMULATED EMERALD ASH BORER INFESTATION IN BLACK ASH WETLANDS. [Masters Thesis]. Michigan Technological University; 2020. Available from: https://digitalcommons.mtu.edu/etdr/1063
University of Louisville
8.
Tompkins, Lindsay Koloff.
Memory and fine motor skill test performance among children living near coal ash storage sites.
Degree: MS, 2016, University of Louisville
URL: 10.18297/etd/2499
;
https://ir.library.louisville.edu/etd/2499
► Coal ash, a byproduct of coal combustion,is reduced in 47 U.S. states andfrequently contains heavy metals, some of which are known neurotoxins. An estimated…
(more)
▼ Coal
ash, a byproduct of coal combustion,is reduced in 47 U.S. states andfrequently contains heavy metals, some of which are known neurotoxins. An estimated 1.5 million children live near sites where coal
ash is produced andstored, yet there have been no studies assessing coal
ash exposure and children’s neuro behavioral health. This study is part of a larger cross-sectional study, Coal
Ash and Neuro behavioral Symptoms in Children Aged 6- 14 Years Old, and aimed to determine the relationship between children’s memory and fine motor skill test performance and the proximity of the home to coal
ash storage sites, the participants’ heavy metal body burdens, and presence of fly
ash in the home. Children aged 6 to14 years who lived near coal
ash storage sites in Louisville, Kentucky were recruited to participate. Participation involved the completion of a battery of neurobehavioral tests, the collection of toenails and fingernails, and air and lift sampling inthe home. Neurobehavioral test data and home distance to
ash landfill were available for 55 participants, while nail analysis was available for 32 participants and fly
ash data were available for 49 participants. The results of this study were impacted by a small sample size; however, several patterns were identified. Though not significant, the odds of abnormal or low performance on five neurobehavioral tests were higher among those who lived closer to an
ash landfill (OR range = 1.035 -4.549). The presence of titanium, manganese, and strontium in nail samples were each significantly related to abnormal performance on certain neurobehavioral tests, while higher levels of zinc and copper were significantly related to abnormal or low test performance. Fly
ash was confirmed in 42.9% of homes, and though not significant, the odds of abnormal or low performance on seven neurobehavioral tests were higher among those with fly
ash in their homes (AOR range = 1.150-2.134). The relationship between memory and fine motor skill test performance should be further evaluated as the overarching study’s sample size continues to grow.
Advisors/Committee Members: Zierold, Kristina, Baumgartner, Kathy, Baumgartner, Kathy, Sears, Lonnie, Lorenz, Doug, Hanchette, Carol.
Subjects/Keywords: fly ash; coal fly ash and neurobehavioral health; coal fly ash and children; Epidemiology
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APA (6th Edition):
Tompkins, L. K. (2016). Memory and fine motor skill test performance among children living near coal ash storage sites. (Masters Thesis). University of Louisville. Retrieved from 10.18297/etd/2499 ; https://ir.library.louisville.edu/etd/2499
Chicago Manual of Style (16th Edition):
Tompkins, Lindsay Koloff. “Memory and fine motor skill test performance among children living near coal ash storage sites.” 2016. Masters Thesis, University of Louisville. Accessed April 12, 2021.
10.18297/etd/2499 ; https://ir.library.louisville.edu/etd/2499.
MLA Handbook (7th Edition):
Tompkins, Lindsay Koloff. “Memory and fine motor skill test performance among children living near coal ash storage sites.” 2016. Web. 12 Apr 2021.
Vancouver:
Tompkins LK. Memory and fine motor skill test performance among children living near coal ash storage sites. [Internet] [Masters thesis]. University of Louisville; 2016. [cited 2021 Apr 12].
Available from: 10.18297/etd/2499 ; https://ir.library.louisville.edu/etd/2499.
Council of Science Editors:
Tompkins LK. Memory and fine motor skill test performance among children living near coal ash storage sites. [Masters Thesis]. University of Louisville; 2016. Available from: 10.18297/etd/2499 ; https://ir.library.louisville.edu/etd/2499
Dalhousie University
9.
MacEachern, Daniel.
An Assessment of Wood Ash on Perennial Forage Stands.
Degree: MS, Faculty of Agriculture, 2012, Dalhousie University
URL: http://hdl.handle.net/10222/15827
► Agricultural soils in Nova Scotia are usually limed in order to raise soil pH to ensure optimum availability of soil nutrients. Wood ash, produced by…
(more)
▼ Agricultural soils in Nova Scotia are usually limed in
order to raise soil pH to ensure optimum availability of soil
nutrients. Wood
ash, produced by burning wood-based fuels, is
promoted as a substitute for agricultural lime. This study
individually assessed two wood
ash sources available to Nova Scotia
producers through on-farm sampling as well as greenhouse bioassay
and incubation experiments. The variables measured were soil pH,
plant-available and total element concentrations in soil, total
element concentrations in above ground plant tissue, botanical
composition and pasture condition scores (PCS). Soil pH was
significantly increased after the application of wood ashes,
however the effect was short-lived for one
ash (NewPage).
Agricultural lime was the most effective at increasing pH. Total
soil concentrations of Al, Cr, K and Na remained elevated one year
after
ash application to NewPage sites. Brooklyn Power
ash
contained excessive levels of Zn, Cd, Pb and As.
Advisors/Committee Members: n/a (external-examiner), Dr. Dian Patterson (graduate-coordinator), Dr. Gordon Brewster (thesis-reader), Dr. Ralph Martin (thesis-reader), Dr. James Braid (thesis-reader), Dr. Nancy McLean (thesis-reader), Dr. Nancy McLean (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).
Subjects/Keywords: Wood ash; forage; soil amendment
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APA (6th Edition):
MacEachern, D. (2012). An Assessment of Wood Ash on Perennial Forage Stands. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/15827
Chicago Manual of Style (16th Edition):
MacEachern, Daniel. “An Assessment of Wood Ash on Perennial Forage Stands.” 2012. Masters Thesis, Dalhousie University. Accessed April 12, 2021.
http://hdl.handle.net/10222/15827.
MLA Handbook (7th Edition):
MacEachern, Daniel. “An Assessment of Wood Ash on Perennial Forage Stands.” 2012. Web. 12 Apr 2021.
Vancouver:
MacEachern D. An Assessment of Wood Ash on Perennial Forage Stands. [Internet] [Masters thesis]. Dalhousie University; 2012. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10222/15827.
Council of Science Editors:
MacEachern D. An Assessment of Wood Ash on Perennial Forage Stands. [Masters Thesis]. Dalhousie University; 2012. Available from: http://hdl.handle.net/10222/15827
University of Utah
10.
Butler, Earl B.
Ash analysis and clinker formation of Utah coals.
Degree: MS;, Metallurgical Engineering;, 1936, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1653/rec/121
► The object of this investigation was to find if there is a relation between the analysis of coal ash and clinker formation and to determine…
(more)
▼ The object of this investigation was to find if there is a relation between the analysis of coal ash and clinker formation and to determine if the use of additional agents in coal will improve clinker formation. The conclusions reached are that a monosilicate or high silicate ash will give the most desirable kind of clinker and that the addition of finely divided silicia or of limestone can be used to control clinker formation. The addition of these agents indiscriminately will not be of any value.
Subjects/Keywords: Coal ash
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APA (6th Edition):
Butler, E. B. (1936). Ash analysis and clinker formation of Utah coals. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1653/rec/121
Chicago Manual of Style (16th Edition):
Butler, Earl B. “Ash analysis and clinker formation of Utah coals.” 1936. Masters Thesis, University of Utah. Accessed April 12, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1653/rec/121.
MLA Handbook (7th Edition):
Butler, Earl B. “Ash analysis and clinker formation of Utah coals.” 1936. Web. 12 Apr 2021.
Vancouver:
Butler EB. Ash analysis and clinker formation of Utah coals. [Internet] [Masters thesis]. University of Utah; 1936. [cited 2021 Apr 12].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1653/rec/121.
Council of Science Editors:
Butler EB. Ash analysis and clinker formation of Utah coals. [Masters Thesis]. University of Utah; 1936. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd2/id/1653/rec/121
University of Manchester
11.
Lee, Kuan-I.
Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings.
Degree: 2014, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:237168
► Thermal barrier coatings (TBCs) made of yttria stabilized zirconia (YSZ) have been applied to aero engines industry since 1970s. However, because of the increasing operational…
(more)
▼ Thermal barrier coatings (TBCs) made of yttria
stabilized zirconia (YSZ) have been applied to aero engines
industry since 1970s. However, because of the increasing
operational temperature, TBCs are suffering from molten foreign
deposits known as calcium-magnesium-alumino-silicate (CMAS). Molten
CMAS sinters YSZ top coat and shortens the lifetime of TBCs.
Alumina has been widely proved to prevent CMAS from degradation and
is the most common material chosen to avert a CMAS attack in
state-of-the-art TBC technology.This study uses real volcanic ash
to study the degradation process of TBCs and potential mitigation
mechanisms. The results show that, similar to CMAS, volcanic ash
severely penetrates the thickness and fills the columnar gaps of
the TBC top coat. It is also found that the yttria content of the
YSZ top coat decreases substantially with high temperature exposure
to volcanic ash, which has a detrimental effect on the phase
stability of YSZ. In terms of mitigation, volcanic ash reacts with
alumina around 1310 °C, forming anorthite (CaAl2Si2O8), magnetite
(Fe3O4), and spinel (Al1.75Mg0.889Mn0.351O4) as reactive products,
which, according to the literature, have melting temperatures above
that of the volcanic ash studied and the typical values reported
for CMAS. Since the new melting temperatures are now above the
typical surface operating temperature of turbine components, the
melting-induced penetration of volcanic ash and CMAS can be
considerably suppressed.For the protective coatings, both YSZ and
Al2O3 could be made by using sol-gel based spray coating. However,
different grade of thermal expansion between TBC layers and
protective coating during heat treatment will break the structure
of protective coating which is needed to be conquered in the
future.
n/a
figures, tables (inside of text)
Advisors/Committee Members: Xiao, Ping.
Subjects/Keywords: Thermal barrier coatings; volcanic ash
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APA (6th Edition):
Lee, K. (2014). Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:237168
Chicago Manual of Style (16th Edition):
Lee, Kuan-I. “Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings.” 2014. Doctoral Dissertation, University of Manchester. Accessed April 12, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:237168.
MLA Handbook (7th Edition):
Lee, Kuan-I. “Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings.” 2014. Web. 12 Apr 2021.
Vancouver:
Lee K. Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Apr 12].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:237168.
Council of Science Editors:
Lee K. Volcanic Ash Degradation on Thermal Barrier Coatings and
Preliminary Fabrication of Protective Coatings. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:237168
Vanderbilt University
12.
Gray, Tami Michelle.
Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network.
Degree: MS, Earth and Environmental Sciences, 2015, Vanderbilt University
URL: http://hdl.handle.net/1803/10948
► Due to the climate effects and aviation threats of volcanic eruptions, it is important to accurately locate ash in the atmosphere. This study aims to…
(more)
▼ Due to the climate effects and aviation threats of volcanic eruptions, it is important to accurately locate
ash in the atmosphere. This study aims to explore the accuracy and reliability of training a neural network to identify cases of
ash using observations from the Moderate Resolution Imaging Spectroradiometer (MODIS). Satellite images were obtained for the following eruptions: Kasatochi, Aleutian Islands, 2008; Okmok, Aleutian Islands, 2008; Grímsvötn, northeastern Iceland, 2011; Chaitén, southern Chile, 2008; Puyehue-Cordón Caulle, central Chile, 2011; Sangeang Api, Indonesia, 2014; and Kelut, Indonesia, 2014. The Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) was used to obtain
ash concentrations for the same archived eruptions. A back-propagation neural network was then trained using brightness temperature differences as inputs obtained via the following band combinations: 12-11-μm, 11-8.6-μm, 11-7.3-μm, and 11-μm. Using the
ash concentrations determined via HYSPLIT, a flag was created to differentiate between
ash (1) and no
ash (0) and used as output. When neural network output was compared to the test dataset, 93% of pixels containing
ash were correctly identified and 7% were missed. Nearly 100% of pixels containing SO2-rich
ash were correctly identified.
Advisors/Committee Members: David Jon Furbish, Ph.D. (committee member), Calvin Miller, Ph.D. (committee member), Ralf Bennartz, Ph.D. (Committee Chair).
Subjects/Keywords: neural network; volcanic ash; MODIS
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APA (6th Edition):
Gray, T. M. (2015). Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/10948
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):
Gray, Tami Michelle. “Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network.” 2015. Thesis, Vanderbilt University. Accessed April 12, 2021.
http://hdl.handle.net/1803/10948.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gray, Tami Michelle. “Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network.” 2015. Web. 12 Apr 2021.
Vancouver:
Gray TM. Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network. [Internet] [Thesis]. Vanderbilt University; 2015. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1803/10948.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gray TM. Automatic Volcanic Ash Detection from MODIS Observations using a Back-Propagation Neural Network. [Thesis]. Vanderbilt University; 2015. Available from: http://hdl.handle.net/1803/10948
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Vanderbilt University
13.
Roper, Angela Ruby.
Analysis of naturally occurring radionuclides in fly ash and gypsum samples.
Degree: MS, Physics, 2012, Vanderbilt University
URL: http://hdl.handle.net/1803/13022
► Coal combustion residues from coal fired power plants are advantageous for use in building and construction materials. These by-products contain trace quantities of natural radionuclides…
(more)
▼ Coal combustion residues from coal fired power plants are advantageous for use in building and construction materials. These by-products contain trace quantities of natural radionuclides from the uranium and thorium series, as well as naturally occurring radionuclides such as 40K. Analysis was performed for samples of coal fly
ash, flue gas desulfurization (FGD) gypsum, and scrubber sludge from the United States. The radioactive content of 234U and 232Th decay series nuclides was determined using gamma photopeaks from progeny 213Pb at 352 keV and 208Tl at 583 keV, respectively; 40K concentrations were determined using the 1461 keV photopeak. The samples were hermetically sealed for several weeks to allow for secular equilibrium between the radium parents and the radon and subsequent progeny. Samples were analyzed in a common geometry using two high purity Germanium photon detectors with low energy detection capabilities. The specific activities (Bq kg-1) were compared to results from literature studies including different building materials and fly
ash concentrations. Fly
ash bituminous 238U concentrations varied from 30 to 217 Bq kg-1 (mean + 1 sd 119 ± 45 Bq kg-1), and sub-bituminous concentrations varied from 72 to 209 Bq kg-1 (115 ± 40 Bq kg-1); bituminous 232Th concentrations varied from 10 to 120 Bq kg-1 (73 ± 26 Bq kg-1), and sub–bituminous concentrations varied from 53 to 110 Bq kg-1 (81 ± 18 Bq kg-1); bituminous 40K concentrations varied from 177 to 928 Bq kg-1 (569 ± 184 Bq kg-1), and sub-bituminous concentrations varied from 87 to 303 Bq kg-1 (171 ± 69 Bq kg-1). A dosimetric analysis was performed for both external and internal dose components for persons inhabiting buildings with fly
ash incorporated in the building materials. The internal dose was calculated for 222Rn using results from pervious literature and the results of the specific activity from study. The external dose was calculated using GEometry ANd Tracking 4 GEant4 Monte Carlo radiation transport simulation environment.
Advisors/Committee Members: Dr. David S. Kosson (committee member), Dr. Micheal G. Stabin (Committee Chair).
Subjects/Keywords: gypsum; coal; fly ash
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Manager
APA (6th Edition):
Roper, A. R. (2012). Analysis of naturally occurring radionuclides in fly ash and gypsum samples. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13022
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):
Roper, Angela Ruby. “Analysis of naturally occurring radionuclides in fly ash and gypsum samples.” 2012. Thesis, Vanderbilt University. Accessed April 12, 2021.
http://hdl.handle.net/1803/13022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roper, Angela Ruby. “Analysis of naturally occurring radionuclides in fly ash and gypsum samples.” 2012. Web. 12 Apr 2021.
Vancouver:
Roper AR. Analysis of naturally occurring radionuclides in fly ash and gypsum samples. [Internet] [Thesis]. Vanderbilt University; 2012. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1803/13022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roper AR. Analysis of naturally occurring radionuclides in fly ash and gypsum samples. [Thesis]. Vanderbilt University; 2012. Available from: http://hdl.handle.net/1803/13022
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
Sunilaa george.
Flexural behaviour and corrosion potential of activated
fly ash concrete;.
Degree: Flexural behaviour and corrosion potential of
activated fly ash concrete, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/16146
► Flexural behaviour and corrosion potential of activated fly ash concrete The conventional binding agent in concrete is Ordinary Portland newlineCement (OPC). However, cement production is…
(more)
▼ Flexural behaviour and corrosion potential of
activated fly ash concrete The conventional binding agent in
concrete is Ordinary Portland newlineCement (OPC). However, cement
production is highly energy intensive and newlineinvolved in CO2
emission to the atmosphere. The search for a cementitious
newlinematerial which resists against nature has started long back.
On the other hand newlinedisposal of solid wastes from power plants
that use coal for production poses newlinegreat environmental
problem for India and requires a mission-mode approach. newlineThe
development and use of mineral admixture for cement
newlinereplacement is growing in construction industry mainly due
to the newlineconsideration of cost saving, energy saving,
environmental protection and newlineconservation of resources. But
the utilization of fly ash in construction is newlinelimited only
to road works and for the manufacture of fly ash bricks and
newlinePortland Pozzolanic cements in India. The cement production
consumes vast newlineamounts of limestone and clay, besides being
energy-intensive. Fly ash in newlinecement concrete is one of the
areas where huge potential exists for large-scale newlinevalue
added fly ash utilization on sustainable basis as in India,
concrete newlineindustry is the largest consumer of Portland and
modified Portland cements at newlinean annual rate of about 320
million tons. The utilization of fly ash as construction material
largely depends newlineon its mineral structure and pozzolanic
property. These two properties of fly newlineash can be enhanced by
different methods of activation. Mechanical newlineactivation by
grinding and thermal activation by heating needs advanced and
costly equipments. At the same time the chemical properties like pH
and newlinecorrosion inhibition are not improved much. Whereas
chemical activation by newlineadding chemicals like gypsum, sodium
hydroxide, sodium silicate, calcium newlineoxide is cheap and
economical.
Advisors/Committee Members: Thenmozhi R.
Subjects/Keywords: Civil engineering; Fly ash concrete
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Manager
APA (6th Edition):
george, S. (2014). Flexural behaviour and corrosion potential of activated
fly ash concrete;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/16146
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):
george, Sunilaa. “Flexural behaviour and corrosion potential of activated
fly ash concrete;.” 2014. Thesis, Anna University. Accessed April 12, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/16146.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
george, Sunilaa. “Flexural behaviour and corrosion potential of activated
fly ash concrete;.” 2014. Web. 12 Apr 2021.
Vancouver:
george S. Flexural behaviour and corrosion potential of activated
fly ash concrete;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 12].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/16146.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
george S. Flexural behaviour and corrosion potential of activated
fly ash concrete;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/16146
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
15.
Braun, Gregory David.
Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/14845
► Over 130 million tons of coal combustion products (CCPs) are produced each year in the U.S. Less than half of these CCPs will be utilized…
(more)
▼ Over 130 million tons of coal combustion products (CCPs) are produced each year in the U.S. Less than half of these CCPs will be utilized in beneficial use projects, such as mine land reclamation, an important practice in Pennsylvania. The remainder will be landfilled. Yet, CCPs are an ideal fill material due to their abundance and their desirable engineering characteristics. The main disadvantage of utilizing CCPs is the variability in material properties seen between differing CCP sources and the change in material behavior over time. This variability makes predicting CCP behavior as an engineered fill difficult. One approach for minimizing the risk associated with CCP variability is to catalog all available data on CCPs, including formation processes, chemical properties, material characteristics, and mechanical behavior. Once this catalog of data has been developed, common trends in material characteristics and mechanical behavior between CCP sources may be identified. Therefore, the purposes of this study are to collect and organize all existing data on Pennsylvania CCPs into an electronic database as well as contribute to the database by obtaining properties of two additional CCPs. An attempt was made to use this data gathered in the database and the results from additional CCP testing to identify trends in material properties and behavior. The testing of the additional CCPs followed a CCP testing framework developed in a previous study. This work focuses on the creation and utilization of this database along with the findings of this additional CCP testing.
The sources of the collected CCP data included published literature and results from years of the Pennsylvania Department of Environmental Protection (DEP) regulatory testing. The collected data was organized into a database designed in Filemaker Pro 11 and then launched as a website. For the additional CCP testing, two fly
ash materials from two different power plants were selected for this study: a class F fly
ash and an FBC fly
ash. The testing methodology for the additional CCPs included general material characterization, such as compaction characteristics, particle size distribution, and specific surface area. Other tests focused on the mechanical behavior of these CCPs over time and included unconfined compression (UC) strength and hydraulic conductivity testing. The tests used to classify CCP mechanical behavior showed that the UC strength and hydraulic conductivity of the material may change, depending on the type of CCP tested. The results of quantitative x-ray diffraction and PHREEQCI modeling show that the formation of ettringite dictates CCP behavior. That is, as the amount of ettringite formed in FBC-PC increases, the strength of the CCP also increases. The lack of strength gain observed for the class F fly
ash was due to the lack of formation of hydration products. In addition, ettringite formation over time reduced the void ratio of the FBC
ash, and thus reduced the hydraulic conductivity.
One important finding of this…
Advisors/Committee Members: Angelica M Palomino, Thesis Advisor/Co-Advisor.
Subjects/Keywords: CCPs; Coal Ash; Ettringite; Database
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APA (6th Edition):
Braun, G. D. (2012). Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14845
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):
Braun, Gregory David. “Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation.” 2012. Thesis, Penn State University. Accessed April 12, 2021.
https://submit-etda.libraries.psu.edu/catalog/14845.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Braun, Gregory David. “Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation.” 2012. Web. 12 Apr 2021.
Vancouver:
Braun GD. Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Apr 12].
Available from: https://submit-etda.libraries.psu.edu/catalog/14845.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Braun GD. Characterization of Pennsylvania Coal Combustion Products for Beneficial Use in Mine Land Reclamation. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/14845
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Toronto
16.
Dong, Fang Hui.
Controlling Biomass Ash Alkalinity for Land Application.
Degree: 2014, University of Toronto
URL: http://hdl.handle.net/1807/68002
► Burning biomass wastes generates large quantities of ash products which contain plant nutrients, such as Ca, Mg, K, and P. These nutrients could be returned…
(more)
▼ Burning biomass wastes generates large quantities of ash products which contain plant nutrients, such as Ca, Mg, K, and P. These nutrients could be returned for reforestation. However, the ash high alkalinity presents some challenges in terms of direct land application. The high alkalinity affects the leachability of various ash components and adversely affects ground vegetation. In this thesis, it will be shown that CO2 can effectively decrease ash alkalinity at room temperature. From the study, it was found that the rate carbonation depends heavily on the moisture content of the ash and the CO2 partial pressure. From a practical point of view, a combined process of ash pelletization and carbonation was tested to have some potential for industrial application. It was found that the time required for carbonation equals the time it takes for the wetted pellet, regardless of the size, to dry at 15 vol% of CO2.
M.A.S.
Advisors/Committee Members: Kirk, W Donald, Chemical Engineering Applied Chemistry.
Subjects/Keywords: Ash alkalinity; Carbonation; 0542
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APA (6th Edition):
Dong, F. H. (2014). Controlling Biomass Ash Alkalinity for Land Application. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/68002
Chicago Manual of Style (16th Edition):
Dong, Fang Hui. “Controlling Biomass Ash Alkalinity for Land Application.” 2014. Masters Thesis, University of Toronto. Accessed April 12, 2021.
http://hdl.handle.net/1807/68002.
MLA Handbook (7th Edition):
Dong, Fang Hui. “Controlling Biomass Ash Alkalinity for Land Application.” 2014. Web. 12 Apr 2021.
Vancouver:
Dong FH. Controlling Biomass Ash Alkalinity for Land Application. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1807/68002.
Council of Science Editors:
Dong FH. Controlling Biomass Ash Alkalinity for Land Application. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/68002
University of Namibia
17.
Epafras, Andreas.
Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
.
Degree: 2019, University of Namibia
URL: http://hdl.handle.net/11070/2857
► The objectives of this study were to quantify and characterize the nutritional content of milled Senegalia mellifera milled biomass obtained from nine blocks at Neudamm…
(more)
▼ The objectives of this study were to quantify and characterize the nutritional content of milled Senegalia mellifera milled biomass obtained from nine blocks at Neudamm farm and to determine the dry matter intake (DMI), apparent digestibility and nitrogen retention in female Boer goats fed with Senegalia mellifera bush based feeds. Wood ash (WA), Polyethylene glycol (PEG, 6 000) and Biochar were evaluated as tannin deactivation methods. The milled biomass of S. mellifera was mixed using a clean concrete mixer with the following ingredients: yellow maize meal, liquid molasses; Marula oil press cake and coarse salt to formulate a complete diet with 14%CP and 11MJ ME/kg. Detannification treatments methods were added at a level of 5 g per day during feeding time. Eight (8) female Boer goats, with an average initial body mass of 31.5 kg (± 2.5 kg), were used in the feeding experiment. The goats were penned individually in metabolic cages measuring 120 cm long, 54 cm wide and 90 cm above the ground, allowing for the total collection of faeces and urine separately. Clean water was available ad libitum to the goats during the entire feeding experiment. The goats were fed in a 4x4 cross over Latin square design with four periods of experimental feeding. Each period lasted for 17 days, resulting in 68 days of experimental feeding. The goats were fed twice daily at 09:00h and 16:00h. The level of dry matter (DM) of feed offered was 4% of body weight. The results obtained in this study showed that there was a significant difference (p <0.05) in the chemical composition of Senegalia mellifera milled biomass harvested from the nine blocks at Neudamm farm. The CP content of Senegalia mellifera milled biomass ranged from 9.39 to 9.68 %DM while the NDF and ADF ranged from 59.17 to 64.33%DM and 43.77 to 48.01%DM, respectively. The condensed tannins (CT) content from all blocks did not differ (p >0.05) and had a mean of 0.02 to 0.03%DM as leucocyanidin equivalent (LE Absorbance at 550 nm).
The results obtained from the feeding trial showed that there was significant difference (p <0.05) in the organic matter (OM) and ash content of different treatment diets. The apparent digestibility coefficient of DM, OM and NDF were not significantly different among treatments and the control diet (p >0.05). Goats fed Biochar treated diet had the highest nitrogen intake (13.74g/d (p <0.05), faecal nitrogen of 8.43g/d (p <0.05) and nitrogen retention of 5.11g/d (p <0.05), while goats fed the control feed (CNT), PEG and WA were similar (p >0.05). All treatments resulted in a positive nitrogen retention (p >0.05) with mean values ranging from 3.79 to 5.11 g/d. The study concluded that, there was a significant difference (p <0.05) in the chemical composition of S. mellifera milled biomass collected from nine blocks at Neudamm farm. Given the high CP content of the S. mellifera, this fodder resource can be considered a suitable supplement for poor quality (low N content) natural pastures and crop residues such as grass hay, straw and stover. The study…
Subjects/Keywords: Wood ash;
Biochar;
Nitrogen
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APA (6th Edition):
Epafras, A. (2019). Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
. (Thesis). University of Namibia. Retrieved from http://hdl.handle.net/11070/2857
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):
Epafras, Andreas. “Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
.” 2019. Thesis, University of Namibia. Accessed April 12, 2021.
http://hdl.handle.net/11070/2857.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Epafras, Andreas. “Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
.” 2019. Web. 12 Apr 2021.
Vancouver:
Epafras A. Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
. [Internet] [Thesis]. University of Namibia; 2019. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11070/2857.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Epafras A. Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
. [Thesis]. University of Namibia; 2019. Available from: http://hdl.handle.net/11070/2857
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Central Connecticut State University
18.
Gaciarz, Rafal, 1972-.
Stabilization of silty soil using fly ash.
Degree: Department of Engineering Technology, 2012, Central Connecticut State University
URL: http://content.library.ccsu.edu/u?/ccsutheses,1788
► Soil Stabilization occupies an important role in all Civil Engineering works. Now with the scarcity of good building sites, engineers are forced to use the…
(more)
▼ Soil Stabilization occupies an important role in all Civil Engineering works. Now with the scarcity of good building sites, engineers are forced to use the available sites, modify their geotechnical properties and build facilities. In these direction different methods of soil stabilization offers them inexpensive but efficient solutions. Soil stabilization is the process of increasing strength and bearing capacity of soils either by mechanical or chemical methods. Stabilization also eliminates or decreases settlements, hydraulic conductivity and swell and shrinkage potential. The mechanical method of stabilization involves the change of gradation of the soil and densifying the soil by mechanical methods such as rollers. Chemical stabilization involves altering the properties by adding cement, lime or any other cementations material. In this study an attempt has made to investigate the efficacy of class C Fly
Ash to stabilize silty soils. Varying proportions of fly
ash was added and determined the basic geotechnical properties such as, specific gravity, plasticity, compaction characteristics, unconfined compression strength and stress-strain modulus. It has been observed that the addition of fly
ash did not alter significantly the plasticity characteristics of the soil. Standard Proctor and Harvard Miniature Compaction Tests revealed that maximum dry density increases with increasing fly
ash content and optimum moisture contents decreased with increasing in
ash contents. Unconfined compression tests were conducted on compacted specimens corresponding water contents of optimum moisture contents (OMC), OMC-2%, and OMC+2%. It has been observed that the unconfined compressive strength (qu) and consequently the undrained shear strength (SuƠ) which is half the unconfined compressive strength increased moderately with increasing fly
ash content for all the 3 moisture content conditions. However, the stress-strain modulus decreased with increasing
ash content. The modulus and the unconfined compressive strengths of soil-fly
ash mixtures can be expressed by an approximate formula: E=15 to 100qu Where, E = Stress-Strain modulus (either Tangent or Secant Modulus) qu = Unconfined compressive strength. From the analysis of the results of this study, it appears that fly
ash is not an effective stabilizer to stabilize silty soils. This may be due to the fact that both silt particles and fly-
ash particles have approximately same size. This might result in poor gradation that is deficient in particle interlocking in silt-fly
ash mixtures. Another important property required for effective stabilization is plasticity. Unlike lime, fly
ash is a low or non-plastic material and is not effective in binding the soil particles together
Advisors/Committee Members: ;, Basim, Swamy.
Subjects/Keywords: Soil stabilization; Fly ash
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APA (6th Edition):
Gaciarz, Rafal, 1. (2012). Stabilization of silty soil using fly ash. (Thesis). Central Connecticut State University. Retrieved from http://content.library.ccsu.edu/u?/ccsutheses,1788
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):
Gaciarz, Rafal, 1972-. “Stabilization of silty soil using fly ash.” 2012. Thesis, Central Connecticut State University. Accessed April 12, 2021.
http://content.library.ccsu.edu/u?/ccsutheses,1788.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gaciarz, Rafal, 1972-. “Stabilization of silty soil using fly ash.” 2012. Web. 12 Apr 2021.
Vancouver:
Gaciarz, Rafal 1. Stabilization of silty soil using fly ash. [Internet] [Thesis]. Central Connecticut State University; 2012. [cited 2021 Apr 12].
Available from: http://content.library.ccsu.edu/u?/ccsutheses,1788.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gaciarz, Rafal 1. Stabilization of silty soil using fly ash. [Thesis]. Central Connecticut State University; 2012. Available from: http://content.library.ccsu.edu/u?/ccsutheses,1788
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Central Connecticut State University
19.
Saiki, Khelifa, 1971-.
Stabilization of Clay Using Fly Ash.
Degree: Department of Engineering Technology, 2014, Central Connecticut State University
URL: http://content.library.ccsu.edu/u?/ccsutheses,2002
► Soil stabilization is a technique to improve soil properties. Currently many methods are available to stabilize soils and improve their engineering properties. The soil type,soilstructure…
(more)
▼ Soil stabilization is a technique to improve soil properties. Currently many methods are available to stabilize soils and improve their engineering properties. The soil type,soilstructure and economic factors govern the decision to select an appropriate single or a combination of two or more methods. The stabilization of soil can be accomplished by adding cementing material, or some other chemical material to change engineering property of soil. After this addition of stabilizer to soil, engineering properties of soil such as increases strength, load bearing capacity, durability, workability and etc. Stabilization can be achieved by mechanically mixing the natural soil and stabilizer together to reach desired improvement. There are many types of additives which can be used for stabilization. There are Portland cement, lime and fly
ash. This project focuses on the effectiveness of fly
ash as stabilizer. Fly
ash is a waste material produced by combustion of pulverized coal in thermal power plants. Since many years fly
ash has been used as a construction material. Thermal power plants produce two kinds of fly
ash; class F and class C. Class F fly
ash is more popular than class C and contains less amount of lime. Class C fly
ash has a large amount of lime, (more than 20%), so it has a better cementing characteristic. Class F
ash are used in Portland cement production. While class C fly
ash is more suitable in soil stabilization because of high percentage of lime and its cementing characteristics. In this project we used fly
ash of class C as soil stabilizer, by adding a varying proportions of fly
ash we determined the basic geotechnical properties such as, specific gravity, plasticity, compaction characteristics, unconfined compression strength and stress-strain modulus. Addition of small percentage of fly
ash (about 3 %) decrease plasticity characteristics of clay. Beyond this percentage, addition of fly-
ash tends to increase the plasticity. Harvard Miniature Compaction Tests indicate that maximum dry density increases with increasing fly
ash content and optimum moisture contents decrease with increase in
ash contents. Unconfined compressive tests were conducted on compacted specimens corresponding water content of optimum moisture contents (OMC), OMC-2%, and OMC +2%. The unconfined compressive strength (qu) and consequently the undrained shear strength (Su) which is half the unconfined compressive strength show a steep increase at 6% fly
ash, beyond that increased moderately with increasing fly
ash content for all the 3 moisture content conditions. However, the stress-strain moduli with increases with increasing fly
ash contents. However it appears that there is no correlation between the modulus of elasticity ant the unconfined compressive strength. The result analysis of this study, it appears that fly
ash class "C" is not an effective stabilizer to stabilize clay. This may be due to the fact that both clay particles and fly-
ash particle have approximately same size. This might result in poor gradation that is…
Advisors/Committee Members: Basim, Swamy.
Subjects/Keywords: Soil stabilization.; Fly ash.
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APA ·
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Manager
APA (6th Edition):
Saiki, Khelifa, 1. (2014). Stabilization of Clay Using Fly Ash. (Thesis). Central Connecticut State University. Retrieved from http://content.library.ccsu.edu/u?/ccsutheses,2002
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):
Saiki, Khelifa, 1971-. “Stabilization of Clay Using Fly Ash.” 2014. Thesis, Central Connecticut State University. Accessed April 12, 2021.
http://content.library.ccsu.edu/u?/ccsutheses,2002.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Saiki, Khelifa, 1971-. “Stabilization of Clay Using Fly Ash.” 2014. Web. 12 Apr 2021.
Vancouver:
Saiki, Khelifa 1. Stabilization of Clay Using Fly Ash. [Internet] [Thesis]. Central Connecticut State University; 2014. [cited 2021 Apr 12].
Available from: http://content.library.ccsu.edu/u?/ccsutheses,2002.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Saiki, Khelifa 1. Stabilization of Clay Using Fly Ash. [Thesis]. Central Connecticut State University; 2014. Available from: http://content.library.ccsu.edu/u?/ccsutheses,2002
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Michigan State University
20.
Someshwar, Arun V.
Fly-ash resistivity : its measurement and correct interpretation.
Degree: PhD, Department of Chemical Engineering, 1979, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:41895
Subjects/Keywords: Fly ash
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APA ·
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Export
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APA (6th Edition):
Someshwar, A. V. (1979). Fly-ash resistivity : its measurement and correct interpretation. (Doctoral Dissertation). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:41895
Chicago Manual of Style (16th Edition):
Someshwar, Arun V. “Fly-ash resistivity : its measurement and correct interpretation.” 1979. Doctoral Dissertation, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:41895.
MLA Handbook (7th Edition):
Someshwar, Arun V. “Fly-ash resistivity : its measurement and correct interpretation.” 1979. Web. 12 Apr 2021.
Vancouver:
Someshwar AV. Fly-ash resistivity : its measurement and correct interpretation. [Internet] [Doctoral dissertation]. Michigan State University; 1979. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:41895.
Council of Science Editors:
Someshwar AV. Fly-ash resistivity : its measurement and correct interpretation. [Doctoral Dissertation]. Michigan State University; 1979. Available from: http://etd.lib.msu.edu/islandora/object/etd:41895
Michigan State University
21.
Guenther, Kenneth Wayne.
An investigation of the tolerance of white ash reproduction.
Degree: MS, 1950, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:7193
Subjects/Keywords: White ash
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APA (6th Edition):
Guenther, K. W. (1950). An investigation of the tolerance of white ash reproduction. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:7193
Chicago Manual of Style (16th Edition):
Guenther, Kenneth Wayne. “An investigation of the tolerance of white ash reproduction.” 1950. Masters Thesis, Michigan State University. Accessed April 12, 2021.
http://etd.lib.msu.edu/islandora/object/etd:7193.
MLA Handbook (7th Edition):
Guenther, Kenneth Wayne. “An investigation of the tolerance of white ash reproduction.” 1950. Web. 12 Apr 2021.
Vancouver:
Guenther KW. An investigation of the tolerance of white ash reproduction. [Internet] [Masters thesis]. Michigan State University; 1950. [cited 2021 Apr 12].
Available from: http://etd.lib.msu.edu/islandora/object/etd:7193.
Council of Science Editors:
Guenther KW. An investigation of the tolerance of white ash reproduction. [Masters Thesis]. Michigan State University; 1950. Available from: http://etd.lib.msu.edu/islandora/object/etd:7193
Southern Cross University
22.
Arif, Elisabeth.
Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes.
Degree: 2016, Southern Cross University
URL: https://epubs.scu.edu.au/theses/486
► Sugar-cane bagasse ash (SCBA), from combustion of bagasse fibre at co-generation sugar-cane mills, is an aluminosilicate waste material suitable for studies in concrete as a…
(more)
▼ Sugar-cane bagasse ash (SCBA), from combustion of bagasse fibre at co-generation sugar-cane mills, is an aluminosilicate waste material suitable for studies in concrete as a pozzolanic supplementary cementitious material and/or a filler. The use of waste materials as supplementary materials in concretes reduces the problems associated with waste disposal and helps to reduce the environmental impact of the cement industry. The use of waste materials as fillers also alleviates waste disposal and reduces the environmental impacts associated with mining natural resources. However, SCBA must be high in amorphous silica to be pozzolanic and have a small particle size (< 63 μm) to be an effective filler material. The SCBA from a high-efficiency co-generation boiler contains high amounts of silica (78.498%) which is substantially crystalline α-quartz rather than amorphous. The mean particle volume was 56.963 μm hence may be a suitable filler. Pozzolanic reactivity of the SCBA in lime-SCBA pastes confirmed the SCBA had little to no pozzolanic activity. Cement pastes made with partial replacement of cement with the SCBA showed pozzolanic strength gains at 5% replacement. However, at higher replacement levels the comparative strengths were lower than controls, hence the filler effect of the SCBA contributes to strength gain through pore refining. Compressive strengths of standard mortars with partial cement replacement confirmed that the SCBA acts primarily as a pore filler. Hence, the SCBA as a filler replacing sand in concretes up to 20% (by weight of the cement) improved concrete 7, 14, and 28 day strengths. The 90-day strengths were also improved except for the 20% SCBA concrete but was still above the target strength of 40 MPa. The 28 day flexural strength of concretes increased with increasing SCBA. Drying shrinkage of the SCBA concretes improved particularly at 5% replacement level. The SCBA had a large proportion of irregular and porous particles and an LOI of 7.150% hence superplasticizer was required to maintain workability in SCBA concretes. The SCBA pore refining effect improved the acid resistance of standard mortars and concretes submerged in a 1% sulphuric acid solution. However, the Rapid Chloride Penetrability Test (RCPT) test suggests increased permeability to chloride ingress but is possibly a misleading result from interference from SCBA and/or superplasticizer. The use of high volumes of unprocessed SCBA in concretes as filler is a promising solution to SCBA waste disposal and environmental impacts of sand mining. Further the use of low volumes of SCBA as supplementary cementitious materials lessens the environmental impact of concrete and provides alternative income for the sugar-cane industry.
Subjects/Keywords: Concrete; bagasse ash; mortar; pozzolan
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APA (6th Edition):
Arif, E. (2016). Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes. (Thesis). Southern Cross University. Retrieved from https://epubs.scu.edu.au/theses/486
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):
Arif, Elisabeth. “Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes.” 2016. Thesis, Southern Cross University. Accessed April 12, 2021.
https://epubs.scu.edu.au/theses/486.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Arif, Elisabeth. “Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes.” 2016. Web. 12 Apr 2021.
Vancouver:
Arif E. Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes. [Internet] [Thesis]. Southern Cross University; 2016. [cited 2021 Apr 12].
Available from: https://epubs.scu.edu.au/theses/486.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Arif E. Development of value added products from sugarcane boiler ashes: utilisation in cements, mortars and concretes. [Thesis]. Southern Cross University; 2016. Available from: https://epubs.scu.edu.au/theses/486
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Georgia Tech
23.
Telling, Jennifer Whitney.
Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics.
Degree: PhD, Earth and Atmospheric Sciences, 2013, Georgia Tech
URL: http://hdl.handle.net/1853/52925
► Although numerous hazard models exist to assess possible ash fallout from explosive volcanic eruptions around the world, these models frequently neglect to consider ash aggregation…
(more)
▼ Although numerous hazard models exist to assess possible
ash fallout from explosive volcanic eruptions around the world, these models frequently neglect to consider
ash aggregation or use a simple percent proxy to represent aggregation, without considering the varying processes at work throughout the volcanic flow. Eruption dynamics are sensitive to
ash aggregation, and
ash aggregates are commonly found in eruptive deposits, yet few experiments have been conducted on aggregation phenomena using natural materials. In this work, experiments were developed to produce both probabilistic and process-based relationships for the efficiency of
ash aggregation with respect particle size, collision kinetic energy, atmospheric water vapor and residence time. A synthetic
ash proxy, ballotini, and
ash from the 2006 eruption of Tungurahua, Ecuador, and the 1980 eruption of Mount St. Helens, WA, were examined for their aggregation potential.
Two aggregation regimes, wet and dry, were identified based on their potential for aggregation. The wet flow regime occurs when particles are circulated in high relative humidity environments long enough to develop a water layer with a thickness that exceeds the particle roughness scale. Hydrodynamic forces control aggregation in the wet flow regime. The dry flow regime includes particles in low relative humidity environments as well as those that circulate too briefly in high humidity environments to fully develop a water layer. Electrostatic forces control aggregation in the dry flow regime. Aggregation efficiency in both regimes was dominantly controlled by collision kinetic energy; however, this effect is significantly dampened in the wet flow regime. Equations governing the relationships between aggregation efficiency, collision kinetic energy and the related forcings in the wet or dry flow regimes have been developed for implementation into large-scale numerical volcanic models.
The results of this experimental work have been developed into a probability distribution that has been integrated and incorporated into a multifluid numerical model. The numerical simulation was tested on a range of explosive depths and overpressure estimates from the 1790 eruption of Kilauea volcano, HI. The model output was compared to field data collected on the deposit thickness moving away from the source and the distribution, including both size and density, of aggregates. The mass fraction of
ash removed from the eruption column in the form of aggregates was also calculated to examine how efficiently aggregation processes remove
ash throughout the eruption. Cumulatively, the work presented here furthers our understanding of aggregation processes and the role they play in volcanic eruptions.
Advisors/Committee Members: Dufek, Josef (advisor), Newman, Andrew (committee member), Nenes, Athanasios (committee member), Wray, James (committee member), Huber, Christian (committee member).
Subjects/Keywords: Volcanology; Aggregation; Ash; Experiments
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APA (6th Edition):
Telling, J. W. (2013). Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/52925
Chicago Manual of Style (16th Edition):
Telling, Jennifer Whitney. “Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics.” 2013. Doctoral Dissertation, Georgia Tech. Accessed April 12, 2021.
http://hdl.handle.net/1853/52925.
MLA Handbook (7th Edition):
Telling, Jennifer Whitney. “Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics.” 2013. Web. 12 Apr 2021.
Vancouver:
Telling JW. Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics. [Internet] [Doctoral dissertation]. Georgia Tech; 2013. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/1853/52925.
Council of Science Editors:
Telling JW. Microphysical processes of volcanic ash aggregation and their implications for volcanic eruption dynamics. [Doctoral Dissertation]. Georgia Tech; 2013. Available from: http://hdl.handle.net/1853/52925
University of New South Wales
24.
Fang, Yuan.
Structure and development of fly ash and red mud-based geopolymers.
Degree: Engineering & Information Technology, 2013, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53146
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11832/SOURCE01?view=true
► This research explores the role of water in fly ash-based geopolymers using the less conventional activators; Na2CO3 and Ca(OH)2. It included the determination of evaporable…
(more)
▼ This research explores the role of water in fly
ash-based geopolymers using the less conventional activators; Na2CO3 and Ca(OH)2. It included the determination of evaporable and combined water at ambient, 105°C and 1050 °C, and characterization of the micro-structure using SEM, XRD, IR, TGA and NMR. The results obtained suggested that the resulting geopolymer compounds contain a measurable amount of non-evaporable/combined water (which escapes at and above 105 °C) as distinguished from structural water which is rigidly bound, mainly by hydrogen bonding and constitutes an integral part of the geopolymer matrix in the form of molecular water. The backbone structure of Si-O-T (T=Si, Al) bonds was formed and developed as the reaction proceeds. The majority of the water escapes at below 200 °C, which enables the geopolymer to maintain its structural integrity at 1050 °C. The perception of whether Na-geopolymer is sodium aluminosilicate hydrate (N-A-S-H) was discussed, however, no sufficient evidence from IR, TGA and NMR was found in this research to prove that the geopolymer is a hydrate.The research also addresses the possibility of using red mud as an activator and a filler for fly
ash-based geopolymers. The effect of activators such as Ca(OH)2, waterglass and NaOH on fly
ash and red mud-based geopolymers were investigated. The micro-structure of such geopolymers was examined using techniques mentioned above. The results obtained suggested that red mud is not efficient as an activator for fly
ash based-geopolymers; NaOH (above 4 M) causes the leaching of sodium resulting in formation of Na2CO3 in red mud-based geopolymers; water glass (mass ratio of SiO2 to Na2O is 2), which is effective for activating fly
ash, led to unsatisfactory results with red mud based-geopolymers; 10% addition of Ca(OH)2 proved to be effective for red mud and fly
ash based-geopolymers.This research provides an in-depth investigation on whether geopolymeric product is a hydrate. It also explores the possibility of non-traditional activators, such as red mud, from a novel angle. Further, it investigates the micro-structure of geopolymers using red mud which is a high Fe containing material, as a raw material.
Advisors/Committee Members: Kayali, Obada, Engineering & Information Technology, UNSW Canberra, UNSW, Shankar, Krishna, Engineering & Information Technology, UNSW Canberra, UNSW.
Subjects/Keywords: red mud; geopolymer; fly ash
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APA (6th Edition):
Fang, Y. (2013). Structure and development of fly ash and red mud-based geopolymers. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53146 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11832/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Fang, Yuan. “Structure and development of fly ash and red mud-based geopolymers.” 2013. Doctoral Dissertation, University of New South Wales. Accessed April 12, 2021.
http://handle.unsw.edu.au/1959.4/53146 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11832/SOURCE01?view=true.
MLA Handbook (7th Edition):
Fang, Yuan. “Structure and development of fly ash and red mud-based geopolymers.” 2013. Web. 12 Apr 2021.
Vancouver:
Fang Y. Structure and development of fly ash and red mud-based geopolymers. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2021 Apr 12].
Available from: http://handle.unsw.edu.au/1959.4/53146 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11832/SOURCE01?view=true.
Council of Science Editors:
Fang Y. Structure and development of fly ash and red mud-based geopolymers. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53146 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11832/SOURCE01?view=true
University of New South Wales
25.
Xie, Jiting.
Synthesis and Performance of Lightweight Geopolymer Concrete.
Degree: Engineering & Information Technology, 2015, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/55224
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36829/SOURCE02?view=true
► A lightweight concrete (LWC) displays physical, mechanical and structural features preferred in contemporary concrete industry. A major synthetic method for manufacturing high-performance LWCs is to…
(more)
▼ A lightweight concrete (LWC) displays physical, mechanical and structural features preferred in contemporary concrete industry. A major synthetic method for manufacturing high-performance LWCs is to use fly
ash-based lightweight aggregates (FA-LWAs). However, the high-powered FA-L.WA manufacture, in combination with the mounting criticism to the high CO₂ emission of cement industry, will bring in problems of energy consumption, production cost and ecological and environmental defects, and therefore hinder the promotion of high-performance LWCs in current concrete market. For this case, this research investigated a LWC synthesis which consumed less energy but still possessed the desired features, by exploring the employment of a fly
ash-derived geopolymer technology capable of generating lightweight and high-strength materials under mild-temperature conditions. An in-depth investigation on the mechanism of geopolymerisation, including the aspects of raw materials, mix design, and curing temperature, moisture and curing period conditions, was conducted based on mechanical and chemical techniques for synthesizing desired geopolymer materials. Then, the synthetic procedures for LWCs, which consumed less energy compared to the traditional ones, were researched and utilised. The LWCs using both OPC-based and geopolymer binder-based cementitious systems were considered. The physical, mechanical and microstructural performance of produced LWCs was later evaluated, which indicated that these LWCs were of sufficient qualities for high- or medium-strength structural applications. These outcomes confirmed the possibility of producing a low-cost, eco-friendly structural LWC based on the geopolymer technology proposed in this research.
Advisors/Committee Members: Kayali, Obada, Engineering & Information Technology, UNSW Canberra, UNSW, Morozov, Evgeny, Engineering & Information Technology, UNSW Canberra, UNSW.
Subjects/Keywords: fly ash; geopolymer; lightweight
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APA (6th Edition):
Xie, J. (2015). Synthesis and Performance of Lightweight Geopolymer Concrete. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55224 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36829/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Xie, Jiting. “Synthesis and Performance of Lightweight Geopolymer Concrete.” 2015. Doctoral Dissertation, University of New South Wales. Accessed April 12, 2021.
http://handle.unsw.edu.au/1959.4/55224 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36829/SOURCE02?view=true.
MLA Handbook (7th Edition):
Xie, Jiting. “Synthesis and Performance of Lightweight Geopolymer Concrete.” 2015. Web. 12 Apr 2021.
Vancouver:
Xie J. Synthesis and Performance of Lightweight Geopolymer Concrete. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2021 Apr 12].
Available from: http://handle.unsw.edu.au/1959.4/55224 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36829/SOURCE02?view=true.
Council of Science Editors:
Xie J. Synthesis and Performance of Lightweight Geopolymer Concrete. [Doctoral Dissertation]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/55224 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:36829/SOURCE02?view=true
University of New South Wales
26.
Bandyopadhyay, Rakhi.
Effect of coal properties on scaffold formation in rotary kilns.
Degree: Materials Science & Engineering, 2016, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/55906
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39637/SOURCE02?view=true
► The effect of fuel properties on ash deposition behaviour in a coal fired Rotary kiln, used for preparing iron rich pellets from virgin iron ore,…
(more)
▼ The effect of fuel properties on
ash deposition behaviour in a coal fired Rotary kiln, used for preparing iron rich pellets from virgin iron ore, was examined using simulated combustion conditions combined with a range of analytical techniques. A new index based on
ash melting during thermo-mechanical analysis of coal
ash is developed to predict
ash deposition potential in a Rotary kiln, and related to
ash deposition trend near the kiln entrance. Iron dust was found to consist of mainly hematite. Iron dust presence in coal increases
ash agglomeration tendency such that agglomeration intensity increases with increasing concentration of iron dust. The study also established that intensity of iron dust impact is influenced by parent coal chemistry such that iron and calcium rich coals displayed greater intensity of iron dust impact. It seems external iron presence has a stronger effect on
ash agglomeration compared to inherent coal iron minerals as confirmed by TMA index and
ash agglomerate plot. The interfacial examination of iron dust and
ash particles did not show any apparent evidence of chemical interactions which implies that iron dust mainly participated physically for the evolution of agglomerate at least under tested conditions. This suggests that in Rotary kiln, inertial impaction of iron dust may be determining intensity of deposit formation. Increasing kaolinite concentration in coal did not show any apparent change on the agglomeration tendency for low to medium slagging coals. It is possible that due to smaller particle size and lower density, their contribution to possible inertial impaction may be not significant. The study further highlighted that increase in mullite presence in high slagging coals mainly seems to be attributed to addition of external kaolinite in specimens. Like iron dust, kaolinite particles did not appear to show any chemical interaction with coal
ash particles, even though occurs as mullite in the agglomerate. The interfacial studies supported the
ash deposition prediction based on TMA index such that coals with high TMA index displayed high agglomeration index with exception of kaolinite rich coals.The study suggests that physical properties of coal minerals particularly iron bearing phases in coals may have strong effect on the growth of agglomeration. Therefore, future studies may focus on establishing the effect of physical properties of additive as well as variation of coal mineral chemistry with coal grain size.
Advisors/Committee Members: Gupta, Sushil, Materials Science & Engineering, Faculty of Science, UNSW, Sahajwalla, Veena, Materials Science & Engineering, Faculty of Science, UNSW, Lindblom, Bo, LTU, Lulea, Sweden, Ohman, Marcus, LTU, Lulea, Sweden.
Subjects/Keywords: Rotary Kiln; Coal; Ash Deposition
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
Bandyopadhyay, R. (2016). Effect of coal properties on scaffold formation in rotary kilns. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55906 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39637/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Bandyopadhyay, Rakhi. “Effect of coal properties on scaffold formation in rotary kilns.” 2016. Doctoral Dissertation, University of New South Wales. Accessed April 12, 2021.
http://handle.unsw.edu.au/1959.4/55906 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39637/SOURCE02?view=true.
MLA Handbook (7th Edition):
Bandyopadhyay, Rakhi. “Effect of coal properties on scaffold formation in rotary kilns.” 2016. Web. 12 Apr 2021.
Vancouver:
Bandyopadhyay R. Effect of coal properties on scaffold formation in rotary kilns. [Internet] [Doctoral dissertation]. University of New South Wales; 2016. [cited 2021 Apr 12].
Available from: http://handle.unsw.edu.au/1959.4/55906 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39637/SOURCE02?view=true.
Council of Science Editors:
Bandyopadhyay R. Effect of coal properties on scaffold formation in rotary kilns. [Doctoral Dissertation]. University of New South Wales; 2016. Available from: http://handle.unsw.edu.au/1959.4/55906 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:39637/SOURCE02?view=true
Oklahoma State University
27.
Lloyd, Zane.
Investigation of the Quality Control of Waste Products for Concrete.
Degree: Civil Engineering, 2019, Oklahoma State University
URL: http://hdl.handle.net/11244/323418
► This work uses testing for the quality of waste products in the production of concrete. This work will look at two different waste products. The…
(more)
▼ This work uses testing for the quality of waste products in the production of concrete. This work will look at two different waste products. The first is Pulp Cure, a recently developed method for wet curing concrete. The other material is the usage of fly
ash, a waste product from the coal power plant industry in higher volumes than is typically used in modern construction. A range of test methods were used on these materials. Some tests were novel and were developed and refined for this work and others were established ASTM methods. The test methods for Pulp Cure were developed and tested in the laboratory that could determine the quality of a Pulp Cure mixture through numerical data and visual observations. The performance of high volume fly
ash, both class C and class F (ASTM C618), concrete was tested using ASTM methods for slump, strength, resistivity, and isothermal calorimetry. Comparisons were made to the bulk chemistry and particle size distribution of the fly
ash in order to find correlations between oxide content and performance in order to promote the understanding of this material.
Advisors/Committee Members: Ley, Tyler (advisor), Russell, Bruce (committee member), Hartell, Julie (committee member).
Subjects/Keywords: concrete; fly ash; pulp cure
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APA ·
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CSE |
Export
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APA (6th Edition):
Lloyd, Z. (2019). Investigation of the Quality Control of Waste Products for Concrete. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/323418
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):
Lloyd, Zane. “Investigation of the Quality Control of Waste Products for Concrete.” 2019. Thesis, Oklahoma State University. Accessed April 12, 2021.
http://hdl.handle.net/11244/323418.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lloyd, Zane. “Investigation of the Quality Control of Waste Products for Concrete.” 2019. Web. 12 Apr 2021.
Vancouver:
Lloyd Z. Investigation of the Quality Control of Waste Products for Concrete. [Internet] [Thesis]. Oklahoma State University; 2019. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/11244/323418.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lloyd Z. Investigation of the Quality Control of Waste Products for Concrete. [Thesis]. Oklahoma State University; 2019. Available from: http://hdl.handle.net/11244/323418
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Naíla Kelly do Nascimento Lima.
BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte.
Degree: 2007, Universidade Federal do Rio Grande do Norte
URL: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=1588
► This paper aims to verify the Burnouts possibilities of incidence, finding the creating dimensions and comparing with the socio-demographics characteristics of the researched professionals. This…
(more)
▼ This paper aims to verify the Burnouts possibilities of incidence, finding the creating dimensions and comparing with the socio-demographics characteristics of the researched professionals. This quantitative-descriptive search has a population of 197 workers of 23 nourishing companies in Rio Grande do Norte. This population is predominantly male, younger than 28 years old, single, relatively instructed (57,07% with complete high school) and having just started their current job since 79% of the interviewees are in the company less than six years. The AUDITORIA DO SISTEMA HUMANO (ASH) model, utilized for investigation and developed for the Spaniards Quijano and Navarro in 1999, has several dimensions about human resources management and the organizational effectiveness, but only makes part of the research in 19 questions Burnout referring. It was used factorial analyses with extraction method, varimax rotation and Kaiser normalization with the intuition to define the creating dimensions of the syndrome, they were evaluated with Cronbach Alpha coefficient after extraction. The dimensions found through the factorial analyses were: emotional exhaustion, physical exhaustion and vitality. The accumulated explanation value reached 65,30% of total variation. The data socio-demographics dont justify the syndrome appearance, because the T test and ANOVA showed irrelevant values. It has been also observed that the founded dimensions were different of the Maslach sociopsychological perspective (emotional exhaustion, depersonalization and low professional realization) allowing comparison with others researches and the possibility to develop new ones with workers from different assistance areas. These new researches are important, since the syndrome refers to chronic labor stress consequences and any professional is favorable to Burnout, harmful to the company as to the collaborators
Este estudo objetiva verificar a possibilidade de incidência da síndrome de burnout, encontrando as dimensões formadoras e comparando com as características sóciodemográficas dos profissionais pesquisados. A pesquisa de cunho quantitativodescritiva tem como população 197 funcionários de 23 empresas do setor alimentício do Estado do Rio Grande do Norte e é predominantemente masculina, com idade inferior a 28 anos, solteira, relativamente culta (57,07% possuem ensino médio completo) e com pouco tempo no emprego, já que 79% dos entrevistados estão na empresa a menos de seis anos. O modelo da Auditoria do Sistema Humano (ASH), instrumento de investigação utilizado que foi desenvolvido pelos espanhóis Quijano e Navarro em 1999, possui várias dimensões sobre a gestão da qualidade dos Recursos Humanos e a efetividade organizacional, mas só fizeram parte da pesquisa as 19 questões referentes ao burnout. Com intuito de definir as dimensões formadoras da síndrome, foi utilizada a análise fatorial com método de extração, rotação varimax e normalização Kaiser, sendo avaliadas, após a extração, com o coeficiente Alpha de Cronbach. As dimensões encontradas…
Advisors/Committee Members: José Arimatés de Oliveira, Carlos Alberto Freire Medeiros, Tereza de Souza.
Subjects/Keywords: Burnout; ASH; Indústrias alimentícias; ADMINISTRACAO; Burnout; ASH; Nourishing companies
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to Zotero / EndNote / Reference
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APA (6th Edition):
Lima, N. K. d. N. (2007). BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte. (Thesis). Universidade Federal do Rio Grande do Norte. Retrieved from http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=1588
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):
Lima, Naíla Kelly do Nascimento. “BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte.” 2007. Thesis, Universidade Federal do Rio Grande do Norte. Accessed April 12, 2021.
http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=1588.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lima, Naíla Kelly do Nascimento. “BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte.” 2007. Web. 12 Apr 2021.
Vancouver:
Lima NKdN. BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte. [Internet] [Thesis]. Universidade Federal do Rio Grande do Norte; 2007. [cited 2021 Apr 12].
Available from: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=1588.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lima NKdN. BURNOUT: analisando a síndrome do ramo das indústrias alimentícias do Rio Grande do Norte. [Thesis]. Universidade Federal do Rio Grande do Norte; 2007. Available from: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=1588
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
29.
Mitchell, Jessica Elaine.
Application of somatic embryogenesis for propagation of white ash and white oak trees.
Degree: 2016, University of Georgia
URL: http://hdl.handle.net/10724/35435"
► Somatic embryogenesis in vitro propagation systems were used to clonally propagate two significant species of hardwood trees, white ash (Fraxinus americana) and white oak (Quercus…
(more)
▼ Somatic embryogenesis in vitro propagation systems were used to clonally propagate two significant species of hardwood trees, white ash (Fraxinus americana) and white oak (Quercus alba). North America's native ash resource is threatened by
emerald ash borer (Agrilus planipennis Fairmaire; EAB). Via somatic embryogenesis, we clonally propagated white ash genotypes in vitro that have demonstrated resistance to EAB, by initiating embryogenic cultures from zygotic embryos collected from
putatively EAB-resistant trees, potentially eliminating the need to hybridize white ash with EAB-resistant Asian species or to employ gene transfer techniques to produce transgenic trees carrying genes for resistance to EAB. We also demonstrated the
ability to clonally propagate white oak in vitro via somatic embryogenesis, and successfully applied a cryostorage and recovery protocol to embryogenic white oak tissues, providing a base system to which a gene transfer techniques could be applied to
potentially accelerate production of genetically improved white oak trees.
Subjects/Keywords: somatic embryogenesis; tissue culture; white ash; emerald ash borer; white oak
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APA (6th Edition):
Mitchell, J. E. (2016). Application of somatic embryogenesis for propagation of white ash and white oak trees. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/35435"
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):
Mitchell, Jessica Elaine. “Application of somatic embryogenesis for propagation of white ash and white oak trees.” 2016. Thesis, University of Georgia. Accessed April 12, 2021.
http://hdl.handle.net/10724/35435".
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mitchell, Jessica Elaine. “Application of somatic embryogenesis for propagation of white ash and white oak trees.” 2016. Web. 12 Apr 2021.
Vancouver:
Mitchell JE. Application of somatic embryogenesis for propagation of white ash and white oak trees. [Internet] [Thesis]. University of Georgia; 2016. [cited 2021 Apr 12].
Available from: http://hdl.handle.net/10724/35435".
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mitchell JE. Application of somatic embryogenesis for propagation of white ash and white oak trees. [Thesis]. University of Georgia; 2016. Available from: http://hdl.handle.net/10724/35435"
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Padmanaban, I.
Studies on the properties of high and low volume fly ash
concrete; -.
Degree: Civil Engineering, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/27246
► Construction industry is a fast growing sector to meet the current trends of industralisation and infrastructure development and concrete forms a non detachable module of…
(more)
▼ Construction industry is a fast growing sector to
meet the current trends of industralisation and infrastructure
development and concrete forms a non detachable module of
construction the principal binder in concrete is Portland cement
the production of which is a major contributor to greenhouse gas
emissions that are implicated in global warming and climate change
fly ash is an industrial by product generated from combustion of
coal in the thermal power plants and its disposal is a major
problem faced by all the nations across the globe high volume fly
ash concrete HVFAC wil be the solution for the above mentioned
problems and its adoption will enable the construction industry to
become more sustainable in the resource depleting environment there
are no IS codes which specify guidelines on the mixing and
production of HVFAC Hence it requires a detailed investigation
newline
reference p.224-230
Advisors/Committee Members: Kandasamy, S.
Subjects/Keywords: high volume fly ash concrete; low volume fly ash concrete
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APA (6th Edition):
Padmanaban, I. (2014). Studies on the properties of high and low volume fly ash
concrete; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/27246
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):
Padmanaban, I. “Studies on the properties of high and low volume fly ash
concrete; -.” 2014. Thesis, Anna University. Accessed April 12, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/27246.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Padmanaban, I. “Studies on the properties of high and low volume fly ash
concrete; -.” 2014. Web. 12 Apr 2021.
Vancouver:
Padmanaban I. Studies on the properties of high and low volume fly ash
concrete; -. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 12].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27246.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Padmanaban I. Studies on the properties of high and low volume fly ash
concrete; -. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27246
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
