subject:(Particulate organic matter)

University of Minnesota

1. Hamilton, Jaimie. Characterization of Emissions from Small Scale Biomass Gasifier.

Degree: M.S.M.E., Mechanical Engineering, 2013, University of Minnesota

URL: http://hdl.handle.net/11299/191283

► Gasification of biomass has the potential to address many issues related to both the world's energy future and greenhouse gas emissions. Gasification can be carried… (more)

▼ Gasification of biomass has the potential to address many issues related to both the world's energy future and greenhouse gas emissions. Gasification can be carried out in a variety of ways depending on the end-use application of the synthesis gas (syngas) or producer gas. Gasification can also use a variety of feedstocks. Gasifying agricultural waste to generate electricity or provide heating and cooling solutions has the potential to utilize waste products while providing necessary energy. Unfortunately, there are environmental and human health concerns related to the conversion of biomass to energy and the combustion of the bio-derived fuel, as well as efficiency concerns related to the technology. In this study, The Power Pallet, a commercially available integrated gasification reactor, engine and generator was used to quantify the contaminants in the unfiltered producer gas, the filtered producer gas, and the engine exhaust and determine the engine's ability to reduce contaminants through filtration and combustion. The system was also tested to determine the effect of generator loading on operating conditions, emissions, and overall efficiency. The study used a fixed-bed downdraft modified Imbert reactor with a Kubota spark-ignited natural gas engine with a Mecc Alte 10kW generator. Organic solvent, gaseous and particulate matter emissions were characterized at three locations in the gasification system to determine the packed bed filter and engine's ability to reduce concentrations of contaminants. Contaminants, such as benzene, toluene, ethylbenzene, and xylenes (BTEX) and PM, in the gasifier system were cleaned up through the packed bed filter and through combustion in the engine. PM concentrations were approximately 70 mg/Nm3 in the pre-filtered producer gas but concentrations were reduced 98-99% through the packed bed filter. PM concentrations did not change significantly during the combustion in the engine yet specific concentrations of PM were below federally mandated emissions limits for Tier 4 diesel engines. Combustible compound were 99% consumed in the engine and specific concentrations of carbon monoxide were below federally mandated levels from the engine's exhaust. Concentrations of BTEX compounds were reduced to a small degree in the packed bed filter and significantly reduced in the engine. Although concentrations of benzene in engine exhaust were greater than 10 ppm, operating the gasification system in a well-ventilated environment would ensure that the ambient air concentrations of BTEX compounds are below federal limits and protect human health and the environment from the hazards. The efficiency of the reactor increased significantly with increasing electrical load because the reactor operates at constant temperature and the higher flow rates of biomass meant that the heat loss was a smaller portion of the work from the engine. The overall system efficiency increased with increasing electrical load and the efficiency of the engine was fairly steady over the small range of generator loads…

Subjects/Keywords: biomass; downdraft; gasifier; organic solvents; particulate matter

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APA (6^th Edition):

Hamilton, J. (2013). Characterization of Emissions from Small Scale Biomass Gasifier. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/191283

Chicago Manual of Style (16^th Edition):

Hamilton, Jaimie. “Characterization of Emissions from Small Scale Biomass Gasifier.” 2013. Masters Thesis, University of Minnesota. Accessed January 17, 2021. http://hdl.handle.net/11299/191283.

MLA Handbook (7^th Edition):

Hamilton, Jaimie. “Characterization of Emissions from Small Scale Biomass Gasifier.” 2013. Web. 17 Jan 2021.

Vancouver:

Hamilton J. Characterization of Emissions from Small Scale Biomass Gasifier. [Internet] [Masters thesis]. University of Minnesota; 2013. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/11299/191283.

Council of Science Editors:

Hamilton J. Characterization of Emissions from Small Scale Biomass Gasifier. [Masters Thesis]. University of Minnesota; 2013. Available from: http://hdl.handle.net/11299/191283

Texas A&M University

2. Zuck, Nicole A. The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf.

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

URL: http://hdl.handle.net/1969.1/153667

► The Mississippi-Atchafalaya river system discharges into the northern Gulf of Mexico and peaks during the spring freshet bringing high levels of nutrients that spur eutrophication… (more)

▼ The Mississippi-Atchafalaya river system discharges into the northern Gulf of Mexico and peaks during the spring freshet bringing high levels of nutrients that spur eutrophication in surface waters, often resulting in hypoxic (dissolved oxygen concentrations less than 1.4 mL/L) sub-pycnocline conditions. Hypoxia is generally manifest seasonally along the Louisiana coast over the shelf. In summer 2011, high rainfall in the Mississippi-Atchafalaya watershed caused high discharge into the northern Gulf of Mexico. In summer 2012 drought conditions in the watershed significantly reduced the discharge. Summer 2013 conditions returned to the climatologic average river discharge. Discrete samples were collected and continuous measurements were made via an onboard surface-water flow-through system, CTD casts, and by an undulating towed vehicle. Total particulate matter and particulate organic carbon samples were obtained from Niskin bottles on CTD casts. Samples were also taken to measure dissolved oxygen concentration and nutrients along with other hydrographic parameters. Water-column particulate matter and particulate organic carbon were analyzed to investigate the relationship between hypoxia and the composition of the particulate matter along the Texas-Louisiana shelf during different discharge rates in summer 2011 (for C:N of particulate matter), 2012 and 2013 for a larger suite of particle composition and relationship to hydrographic conditions of the Mississippi-Atchafalaya river system. The goal of this research is to determine if a statistically significant relationship is manifest, between shelf hypoxia and total particulate matter, as well as between particulate organic carbon and hypoxia, during periods of different river discharge (i.e. average, flood, or drought conditions). Correlations were identified between some variables, but no direct relationship between particulate matter and hypoxia was observed. There were however, some statistically significant changes in several parameters between summer 2013 and summer 2013. Advisors/Committee Members: Gardner, Wilford (advisor), Richardson, Mary Jo (advisor), DiMarco, Steven (committee member).

Subjects/Keywords: hypoxia; shelf; Texas-Louisiana; particulate matter; PM; particulate organic carbon; POC

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APA (6^th Edition):

Zuck, N. A. (2014). The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153667

Chicago Manual of Style (16^th Edition):

Zuck, Nicole A. “The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf.” 2014. Masters Thesis, Texas A&M University. Accessed January 17, 2021. http://hdl.handle.net/1969.1/153667.

MLA Handbook (7^th Edition):

Zuck, Nicole A. “The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf.” 2014. Web. 17 Jan 2021.

Vancouver:

Zuck NA. The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1969.1/153667.

Council of Science Editors:

Zuck NA. The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153667

NSYSU

3. Shiu, Ruei-Feng. Marine microgel formation: Interferences of natural and anthropogenic substances.

Degree: PhD, Marine Environment and Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101118-095928

► Marine dissolved organic matter (DOM) can self-assemble to form microgels that aggregate into particulate organic matter (POM). The conversion between marine DOM and microgel is… (more)

▼ Marine dissolved organic matter (DOM) can self-assemble to form microgels that aggregate into particulate organic matter (POM). The conversion between marine DOM and microgel is believed to have a critical involvement in many biogeochemical reactions. At present, climate change and human activities will likely cause an increased inflow of natural and anthropogenic substances to coastal and oceanic waters, further altering the DOMâmicrogel shunt. Therefore, understanding the marine organic particle size is essential for establishing the organic matter transportation, CO2 sequestration, and biological pump. Nevertheless, the details of the DOMâPOM behavior in marine environments remain to be established. The main part of this thesis is using laboratory simulations to evaluate the possible impacts of natural (terrestrial or riverine organic matter) and anthropogenic (engineered nanoparticles and surfactants) substances on the DOM-microgel exchange. The data reveal that the release of natural and anthropogenic substances even at low concentrations into the aquatic environment could effectively hinder the self-assembly of DOM polymers, suggest that this DOM aggregation is quite sensitive to external changes. Furthermore, some materials such as riverine organic matter and surfactants can disrupt existing native microgels, converting large assemblies into smaller particles. This size reduction in microgels is closely tied to the surface chemistry of the surrounding materials, such as negative surface charge stabilization, Ca2+ competition, and surface characteristics. The input of natural and anthropogenic substances may decrease DOM polymer aggregation and disperse existing microgel, thereby disturbing the biological pump, and could potentially have far-reaching influences on marine biogeochemical processes. Additionally, riverine and marine DOM was used to examine their aggregation behavior and to evaluate the roles of microgel formation in scavenging of chromophoric dissolved organic matter (CDOM) and heavy metals in a river-sea system. The data indicate that riverine and marine microgels did not exhibit very much difference in size and self-assembly curve. However, the assembly effectiveness of marine samples was much higher than riverine. Besides concentration of dissolved organic carbon, other factors such as types and sources of DOM polymers may control the microgel abundance in aquatic environments. CDOM and metals (Cu, Ni, Mn) were found concurrently removed to an extent via DOM polymer aggregation, which also suggested that the microgels had sequestering capability in CDOM and metals. This finding provides an alternative route for CDOM and heavy metals removal from the water column. As such the process of re-aggregation into microgels should then be considered besides traditional phase (truly dissolved, traditional dissolved, and particulate phase) partitioning in the assessment of the ecological risk and fate of hazardous materials. Advisors/Committee Members: Tung-Yuan Ho (chair), Wei-Hsiang Chen (chair), Chi-Chuan Kan (chair), Chon-Lin Lee (committee member), Jen-Fon Jen (chair), Wei-Hsien Wang (chair), Huey-Ing Chen (chair).

Subjects/Keywords: Microgels; Particulate organic matter; Scavenging; Surfactants; Engineered nanoparticles; Dissolved organic matter; Self-assembly

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APA (6^th Edition):

Shiu, R. (2018). Marine microgel formation: Interferences of natural and anthropogenic substances. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101118-095928

Chicago Manual of Style (16^th Edition):

Shiu, Ruei-Feng. “Marine microgel formation: Interferences of natural and anthropogenic substances.” 2018. Doctoral Dissertation, NSYSU. Accessed January 17, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101118-095928.

MLA Handbook (7^th Edition):

Shiu, Ruei-Feng. “Marine microgel formation: Interferences of natural and anthropogenic substances.” 2018. Web. 17 Jan 2021.

Vancouver:

Shiu R. Marine microgel formation: Interferences of natural and anthropogenic substances. [Internet] [Doctoral dissertation]. NSYSU; 2018. [cited 2021 Jan 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101118-095928.

Council of Science Editors:

Shiu R. Marine microgel formation: Interferences of natural and anthropogenic substances. [Doctoral Dissertation]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0101118-095928

4. Navel, Simon. Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : .

Degree: Docteur es, Écologie, 2011, Université Claude Bernard – Lyon I

URL: http://www.theses.fr/2011LYO10291

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Les réseaux trophiques des cours d'eau de tête de bassin sont généralement dépendants d'apports extérieurs de matière organique particulaire (MOP), principalement des feuilles provenant des… (more)

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Les réseaux trophiques des cours d'eau de tête de bassin sont généralement dépendants d'apports extérieurs de matière organique particulaire (MOP), principalement des feuilles provenant des berges. Ces dernières sont dégradées par les effets conjoints de facteurs abiotiques (lessivage, abrasion, fragmentation physique) et d'un cortège d'organismes : bactéries, champignons et invertébrés. Une part importante des apports de MOP est enfouie dans la zone sédimentaire des cours d'eau (zone hyporhéique) dont les caractéristiques physiques influencent l'activité des microorganismes en contrôlant les conditions chimiques dans les sédiments et déterminent la distribution verticale des invertébrés benthiques. A l'heure actuelle, peu de travaux ont cherché à quantifier l'influence des interactions entre le milieu physique et les activités des organismes sur le processus de dégradation de la MOP enfouie dans le sédiment des cours d'eau. Dans ce contexte, cette thèse a pour but d'étudier le processus de dégradation de la MOP (sous forme de feuilles), et en particulier l'impact des caractéristiques sédimentaires sur la contribution des différentes communautés d'acteurs impliquées dans ce processus (microorganismes et invertébrés). Ma thèse a permis de montrer que la structure physique du milieu influence indirectement la dégradation en contrôlant l'accessibilité (taille des interstices) de la litière enfouie pour les déchiqueteurs, et dans une moindre mesure directement, quand les échanges avec la surface sont très fortement modifiés (colmatage). Les invertébrés déchiqueteurs peuvent accélérer directement la dégradation de la matière organique lorsque cette dernière est accessible. L'impact indirect des invertébrés est lié à leur capacité à remanier le sédiment (bioturbateur ou non) et modifier les conditions physicochimiques dans le sédiment

Pas de résumé disponible

Advisors/Committee Members: Marmonier, Pierre (thesis director), Mermillod-Blondin, Florian (thesis director).

Subjects/Keywords: Milieu hyporhéique; Matière organique particulaire; Hyporheic environment; Particulate organic matter

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APA (6^th Edition):

Navel, S. (2011). Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : . (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2011LYO10291

Chicago Manual of Style (16^th Edition):

Navel, Simon. “Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : .” 2011. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed January 17, 2021. http://www.theses.fr/2011LYO10291.

MLA Handbook (7^th Edition):

Navel, Simon. “Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : .” 2011. Web. 17 Jan 2021.

Vancouver:

Navel S. Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : . [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2011. [cited 2021 Jan 17]. Available from: http://www.theses.fr/2011LYO10291.

Council of Science Editors:

Navel S. Rôle des échanges à l’interface eau-sédiment et de l’activité des invertébrés sur la dégradation de la matière organique particulaire dans le milieu hyporhéique : . [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2011. Available from: http://www.theses.fr/2011LYO10291

University of Hawaii – Manoa

5. Fong, Allison A. Microbial diversity of sinking particulate organic matter in subtropical oceans.

Degree: 2016, University of Hawaii – Manoa

URL: http://hdl.handle.net/10125/100692

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Ph.D. University of Hawaii at Manoa 2013.

The bacterial diversity on sinking particulate organic matter (POM) from open ocean environments was characterized using gene-based sequencing… (more)

Subjects/Keywords: microbial diversity; 16S rRNA gene; marine snow; aggregate; particulate organic matter

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APA (6^th Edition):

Fong, A. A. (2016). Microbial diversity of sinking particulate organic matter in subtropical oceans. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/100692

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

Chicago Manual of Style (16^th Edition):

Fong, Allison A. “Microbial diversity of sinking particulate organic matter in subtropical oceans.” 2016. Thesis, University of Hawaii – Manoa. Accessed January 17, 2021. http://hdl.handle.net/10125/100692.

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

MLA Handbook (7^th Edition):

Fong, Allison A. “Microbial diversity of sinking particulate organic matter in subtropical oceans.” 2016. Web. 17 Jan 2021.

Vancouver:

Fong AA. Microbial diversity of sinking particulate organic matter in subtropical oceans. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10125/100692.

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

Council of Science Editors:

Fong AA. Microbial diversity of sinking particulate organic matter in subtropical oceans. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/100692

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

Universidade do Estado do Rio de Janeiro

6. Talitha Lopes Ferreira da Costa. Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares.

Degree: Master, 2010, Universidade do Estado do Rio de Janeiro

URL: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1626 ;

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O Complexo Estuarino Lagunar Mundaú-Manguaba está sofrendo um processo acelerado de degradação ambiental devido a muitas atividades antrópicas como crescimento urbano desordenado, processamento de cana-de-açúcar,… (more)

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O Complexo Estuarino Lagunar Mundaú-Manguaba está sofrendo um processo acelerado de degradação ambiental devido a muitas atividades antrópicas como crescimento urbano desordenado, processamento de cana-de-açúcar, pecuária, efluentes industriais e domésticos. O objetivo deste trabalho é avaliar a composição e distribuição do material particulado em suspensão através de traçadores geoquímicos orgânicos para identificar as fontes potenciais e os padrões de mistura da matéria orgânica no CELMM durante duas campanhas: uma realizada no período seco e a outra no período úmido. As amostras de água foram coletadas na superfície (< 1 m de profundidade), utilizando garrafas de vidro de 4L de capacidade. Os n-alcoois, esteróis e ácidos graxos foram extraídos por Soxhlet e analisados por cromatografia em fase gasosa acoplada a espectrometria de massas. Considerando os resultados obtidos, constatou-se que há uma predominância de matéria orgânica autóctona em ambos os períodos de amostragem no sistema em questão. Contudo, também foi observada a presença de fontes alóctonas e antrópicas, tendo estas uma menor influência durante o período seco.

The Mundaú-Manguaba estuarine lagoon system is located in Maceió, Alagoas, Brazil. This region has been suffering an accelerated process of environmental degradation through many antropic activities like urban growth, sugar-cane processing, cattle breeding, industrials waste and sewage. The aim of this work is to evaluate the suspended particulate matter composition and distribution with organic geochemistry markers to identify the potential sources and mixing processes in the system during the wet and the dry period. The water samples were collected at the surface (<1m of depth), using a 4L glass bottle. Lipids were extracted by Soxhlet and quantified by gas chromatography-mass spectrometry. Considering the obtained results, a predominance of autochthonous sources of organic matter was established for the system. However, the presence of alochthonous and anthropic also was observed with lower influence during the dry period.

Advisors/Committee Members: Bastiaan Adriaan Knoppers, Débora de Almeida Azevedo, Renato da Silva Carreira.

Subjects/Keywords: Lipídios; Matéria orgânica; Material particulado; Lipids; Organic matter; Particulate matter; OCEANOGRAFIA QUIMICA

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APA (6^th Edition):

Costa, T. L. F. d. (2010). Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares. (Masters Thesis). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1626 ;

Chicago Manual of Style (16^th Edition):

Costa, Talitha Lopes Ferreira da. “Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares.” 2010. Masters Thesis, Universidade do Estado do Rio de Janeiro. Accessed January 17, 2021. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1626 ;.

MLA Handbook (7^th Edition):

Costa, Talitha Lopes Ferreira da. “Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares.” 2010. Web. 17 Jan 2021.

Vancouver:

Costa TLFd. Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares. [Internet] [Masters thesis]. Universidade do Estado do Rio de Janeiro; 2010. [cited 2021 Jan 17]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1626 ;.

Council of Science Editors:

Costa TLFd. Origem e composição da matéria orgânica particulada no complexo estuarino-lagunar de Mundaú-Manguaba utilizando lipídios como marcadores moleculares. [Masters Thesis]. Universidade do Estado do Rio de Janeiro; 2010. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1626 ;

Baylor University

7. Ortiz, Stephanie M. Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX.

Degree: MS, Baylor University. Dept. of Environmental Science., 2016, Baylor University

URL: http://hdl.handle.net/2104/9808

► Carbonaceous aerosol (both fine particulate matter (PM₂.₅) and total suspended particulate (TSP)) were collected during NASA’s DISCOVER-AQ (Deriving Information on Surface Conditions from Column and… (more)

Subjects/Keywords: DISCOVER-AQ. Carbonaceous aerosols. Particulate matter. Total suspended particulate. Organic carbon. Elemental carbon. Water soluble organic carbon.

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APA (6^th Edition):

Ortiz, S. M. (2016). Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/9808

Chicago Manual of Style (16^th Edition):

Ortiz, Stephanie M. “Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX.” 2016. Masters Thesis, Baylor University. Accessed January 17, 2021. http://hdl.handle.net/2104/9808.

MLA Handbook (7^th Edition):

Ortiz, Stephanie M. “Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX.” 2016. Web. 17 Jan 2021.

Vancouver:

Ortiz SM. Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX. [Internet] [Masters thesis]. Baylor University; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2104/9808.

Council of Science Editors:

Ortiz SM. Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX. [Masters Thesis]. Baylor University; 2016. Available from: http://hdl.handle.net/2104/9808

Brigham Young University

8. Cropper, Paul Michael. Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor.

Degree: PhD, 2016, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6667&context=etd

► Tropospheric fine particulate matter (PM) poses serious health risks and has a significant impact on global climate change. The measurement of various aspects of PM… (more)

▼ Tropospheric fine particulate matter (PM) poses serious health risks and has a significant impact on global climate change. The measurement of various aspects of PM is challenging due to its complex chemical nature. This dissertation addresses various aspects of PM, including composition, measurement, and visibility. The U.S. Environmental Protection Agency (EPA) proposed a new secondary standard based on visibility in urban areas using 24-h averaged measurements of either light scatter or PM concentration. However shorter averaging times may better represent human perception of visibility. Data from two studies conducted in Lindon, UT, 2012, and Rubidoux, CA, 2003, were used to compare different techniques to estimate visibility, particularly the effect of relative humidity on visibility estimations. Particle composition was measured in Salt Lake City during January-February of 2009. One-hour averaged concentrations of several gas phase and particle phase inorganic species were measured. The results indicate ammonium nitrate averages 40% of the total PM2.5 mass in the absence of inversions and up to 69% during strong inversions. Also, the formation of ammonium nitrate is nitric acid limited, while the formation of ozone appears to be oxidant and volatile organic carbon (VOC) limited. Reduction of NOx will reduce ammonium nitrate secondary particle formation, however, a decrease in NOx may increase ozone concentration.Due to the complexity of PM it is poorly characterized. A large fraction of PM is composed of organic compounds, but these compounds are not regularly monitored due to limitations in current sampling techniques. The GC-MS Organic Aerosol Monitor (OAM) combines a collection device with thermal desorption, gas chromatography and mass spectrometry to quantitatively measure the carbonaceous components of PM on an hourly averaged basis. A compact GC and simple pre-concentrator were developed for the system to decouple separation from manual injection and enhance separation of environmentally-relevant polar organic compounds, such as levoglucosan. The GC-MS OAM is fully automated and has been successfully deployed in the field. It uses a chemically deactivated filter for collection followed by thermal desorption and GC-MS analysis. Laboratory tests show that detection limits range from 0.2 to 3 ng for many atmospherically relevant compounds. The GC-MS OAM was deployed in the field for semi-continuous measurement of the organic markers, levoglucosan, dehydroabietic acid, and several polycyclic aromatic hydrocarbons (PAHs) during winter (January to March), 2015 and 2016. Results illustrate the significance of this monitoring technique to more fully characterize the organic components of PM and identify sources of pollution.

Subjects/Keywords: air pollution; fine particulate matter; PM2.5; secondary organic aerosol; organic markers; levoglucosan; PMF; Chemistry

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APA (6^th Edition):

Cropper, P. M. (2016). Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor. (Doctoral Dissertation). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6667&context=etd

Chicago Manual of Style (16^th Edition):

Cropper, Paul Michael. “Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor.” 2016. Doctoral Dissertation, Brigham Young University. Accessed January 17, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6667&context=etd.

MLA Handbook (7^th Edition):

Cropper, Paul Michael. “Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor.” 2016. Web. 17 Jan 2021.

Vancouver:

Cropper PM. Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor. [Internet] [Doctoral dissertation]. Brigham Young University; 2016. [cited 2021 Jan 17]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6667&context=etd.

Council of Science Editors:

Cropper PM. Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor. [Doctoral Dissertation]. Brigham Young University; 2016. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6667&context=etd

Georgia Tech

9. Xu, Lu. Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States.

Degree: PhD, Chemical and Biomolecular Engineering, 2016, Georgia Tech

URL: http://hdl.handle.net/1853/55606

► Atmospheric particulate matter (PM) has substantial impacts on climate, air quality, and human health. A substantial fraction of atmospheric PM is constituted of secondary organic… (more)

▼ Atmospheric particulate matter (PM) has substantial impacts on climate, air quality, and human health. A substantial fraction of atmospheric PM is constituted of secondary organic aerosol (SOA), which is formed in the atmosphere through the oxidation of volatile organic compounds (VOCs). Formulating strategies to control SOA is highly challenging, in part, because of the numerous sources and complex formation mechanisms of SOA. In particular, to what extent human activities alter SOA formation from biogenic emissions? Although a number of mechanisms about the interactions of anthropogenic and biogenic emissions on SOA formation have been proposed from prior laboratory studies, only a few have been directly observed in the ambient environment. Moreover, the extent of such interactions in the atmosphere is unknown. This question is investigated in depth in this dissertation based on comprehensive ambient measurements and complementary laboratories studies. The southeastern US is an ideal region to study the effects of anthropogenic emissions on biogenic organic aerosol formation because this region is characterized by large emissions from both biogenic and anthropogenic sources. In this study, we applied a suite of instruments, with a focus on a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS), to extensively characterize the composition of organic aerosol (OA) in the southeastern United States (US). Multiple measurements were obtained during different seasons at both urban sites (Jefferson Street and Georgia Tech Campus in Georgia) and rural sites (Yorkville in Georgia and Centreville in Alabama), as part of Southeastern Center of Air Pollution and Epidemiology Study (SCAPE) and Southern Oxidant and Aerosol Study (SOAS). Positive Matrix Factorization (PMF) analysis was performed on the high-resolution organic mass spectra obtained by the HR-ToF-AMS for OA source apportionment. We identified various OA sources, the contribution of which to OA concentration depends on location and season. Hydrocarbon-like OA (HOA, surrogate of OA emitted directly from vehicle emissions) and cooking OA (COA) have important, but not dominant, contributions to total OA in urban sites (i.e., 21-38% of total OA depending on site and season). Biomass burning OA (BBOA) concentration shows a distinct seasonal variation with a larger enhancement in winter than summer. Isoprene SOA formed via the reactive uptake of isoprene epoxydiols (denoted as Isoprene-OA) is only resolved in warmer months and contributes 18-36% of total OA. More-oxidized and less-oxidized oxygenated organic aerosol (MO-OOA and LO-OOA, respectively) are dominant fractions (47-79%) of OA in all sites. MO-OOA correlates well with ozone in summer, but not in winter, indicating MO-OOA sources may vary with seasons. LO-OOA, which reaches a daily maximum at night, correlates well with estimated nitrate functionality from organic nitrates. These findings significantly improve our understanding of OA sources in the southeastern US and provide suggestions for… Advisors/Committee Members: Ng, Nge Lee (advisor), Jones, Christopher W. (committee member), Huey, Greg (committee member), Nenes, Athanasios (committee member), Weber, Rodney J. (committee member).

Subjects/Keywords: Fine particulate matter; Biogenic secondary organic aerosol; Anthropogenic emissions; Sulfate; Organic nitrates

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APA (6^th Edition):

Xu, L. (2016). Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/55606

Chicago Manual of Style (16^th Edition):

Xu, Lu. “Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States.” 2016. Doctoral Dissertation, Georgia Tech. Accessed January 17, 2021. http://hdl.handle.net/1853/55606.

MLA Handbook (7^th Edition):

Xu, Lu. “Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States.” 2016. Web. 17 Jan 2021.

Vancouver:

Xu L. Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1853/55606.

Council of Science Editors:

Xu L. Effects of anthropogenic emissions on biogenic organic aerosol formation in the southeastern United States. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/55606

University of Georgia

10. Devine, Scott. Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/25431

► In the Piedmont of Georgia, a long-term experiment between conventional (CT) and no-till (NT) agriculture has provided insight into the effects of tillage on biogeochemical… (more)

Subjects/Keywords: agroecosystem; no-till; conventional tillage; forest succession; soil organic matter; particulate organic matter; carbon; acidification; aggregates; biogeochemical

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APA (6^th Edition):

Devine, S. (2014). Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/25431

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

Chicago Manual of Style (16^th Edition):

Devine, Scott. “Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA.” 2014. Thesis, University of Georgia. Accessed January 17, 2021. http://hdl.handle.net/10724/25431.

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

MLA Handbook (7^th Edition):

Devine, Scott. “Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA.” 2014. Web. 17 Jan 2021.

Vancouver:

Devine S. Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10724/25431.

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

Council of Science Editors:

Devine S. Soil change after three decades of conventional till, no-till, and forest succession in the Piedmont of Georgia, USA. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/25431

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

University of Texas – Austin

11. -5457-7724. Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers.

Degree: PhD, Marine science, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/35466

► Climate-linked changes in hydrology and biogeochemical processes within Arctic watersheds are likely already affecting fluvial export of waterborne materials, including organic matter (OM) and dissolved… (more)

▼ Climate-linked changes in hydrology and biogeochemical processes within Arctic watersheds are likely already affecting fluvial export of waterborne materials, including organic matter (OM) and dissolved inorganic nitrogen (DIN). Our understanding of Arctic watershed OM and DIN export response to climate change is hampered by a lack of contemporary baselines, as well as a dearth of seasonally comprehensive studies. This work focuses on characterizing OM and DIN concentrations and sources in six streams/rivers on the North Slope of Alaska during the entirety of the hydrologic year (May through October) in 2009 and 2010. The highest OM concentrations occurred during spring snowmelt, with results indicating that terrestrial vegetation leachates are the major source of dissolved OM, while particulate OM originates from a degraded soil source. Over the hydrologic year, soils became a progressively increasing source of dissolved OM, while autochthonous production made up a sizeable proportion of particulate OM during base flow conditions. DIN concentrations were low throughout the spring and summer and increased markedly during the late summer and fall. Our findings suggest that penetration of water into thawed mineral soils, and a reduction in nitrogen assimilation relative to remineralization, may increase DIN export from Arctic watersheds during the late summer and fall. Although recent studies of Arctic rivers have emphasized the importance of the spring thaw period on OM export, our understanding of the mechanisms that control water chemistry observations during this time are still lacking. Experimental leaching results, from experiments conducted in 2014, suggest that aboveground plant biomass is a major source of dissolved OM in Arctic catchments during the spring, and that the timing of freezing and drying conditions during the fall may impact dissolved OM leaching dynamics on that same material the following snowmelt. Improved knowledge of OM and DIN temporal trends and the mechanisms that control seasonal concentrations is essential for understanding export dynamics of these water constituents in Arctic river systems. Perhaps more importantly, increased understanding of the seasonal controls on OM and DIN export in Arctic rivers is critical for predicting how these systems will respond under future climate change scenarios. Advisors/Committee Members: McClelland, James W. (advisor), Dunton, Kenneth H (committee member), Liu, Zhanfei (committee member), Shank, Gerald C (committee member), Townsend-Small, Amy (committee member).

Subjects/Keywords: Arctic; Alaska; Rivers; Dissolved organic matter; Dissolved organic carbon; Dissolved organic nitrogen; Particulate organic matter; Particulate organic carbon; Particulate organic nitrogen; Dissolved inorganic nitrogen; Nitrate; DOC; DON; POC; PON; DIN; Biogeochemistry

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APA (6^th Edition):

-5457-7724. (2015). Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/35466

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

Chicago Manual of Style (16^th Edition):

-5457-7724. “Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers.” 2015. Doctoral Dissertation, University of Texas – Austin. Accessed January 17, 2021. http://hdl.handle.net/2152/35466.

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

MLA Handbook (7^th Edition):

-5457-7724. “Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers.” 2015. Web. 17 Jan 2021.

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

Vancouver:

-5457-7724. Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2015. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2152/35466.

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

Council of Science Editors:

-5457-7724. Seasonal dynamics of organic matter and inorganic nitrogen in surface waters of Alaskan Arctic streams and rivers. [Doctoral Dissertation]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/35466

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

Texas Tech University

12. Cui, Song. Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock.

Degree: plant and soil science, 2011, Texas Tech University

URL: http://hdl.handle.net/2346/ETD-TTU-2011-08-1711

► Inclusion of legumes in pastures is becoming more important as N prices escalate; however, legumes require more water for growth than warm-season grasses in water-limited… (more)

▼ Inclusion of legumes in pastures is becoming more important as N prices escalate; however, legumes require more water for growth than warm-season grasses in water-limited semi-arid environments. Our hypothesis was that legumes could be identified for use in mixtures with warm-season grasses to increase yield, nutritive value, and N cycling without increasing irrigation appropriate to the grass-alone. Thus, in research conducted between 2007 and 2010 on the Texas Tech University Forage/Livestock Research Farm in the Texas High Plains, alfalfa (Medicago sativa L.), yellow sweetclover (Melilotus officinalis Lam.) and sainfoin (Onobrychis viciifolia Scop.) were each interseeded into three old world bluestems including ‘WW-B.Dahl’ [Bothriochloa bladhii (Retz) S.T. Blake], ‘Sparr’ [B. ischaemum (L.) Keng. var. ischaemum], and ‘Caucasian’ [B. caucasica (Trin.) C.E. Hubbard]. Additionally, no N (control) and 60 kg N ha-1 applied to the grasses alone were included as treatments. Each of the five treatments was replicated three times in a randomized complete block design with a split-plot treatment arrangement. Total irrigation water applied through subsurface drip was limited to a maximum of 250 mm, annually. Forage mass (kg ha-1) and concentrations of N and C in both the grass and the legume components were determined in late spring, mid-summer, and autumn. At the same times, forage nutritive value including calculated dry matter digestibility (DMD), and concentrations of crude protein (CP), cell wall, hemicellulose, cellulose, and lignin were determined. Soil particulate organic matter (POM) N and C concentrations were measured in composites of 10 soil cores representing the surface 5 cm of soil in each replicate at the end of 2009 and 2010. Inclusion of legumes increased total forage yield in both 2008 and 2010 (P < 0.05). Response of forage mass to N fertilization depended on precipitation distribution. Grass-legume mixtures had lower cell wall and cellulose concentrations, as well as greater DMD and CP concentrations than grass monocultures regardless of sampling date (P < 0.05). Grass N concentration was increased by inclusion of legumes in the entire growing season (P < 0.05). Additionally, inclusion of yellow sweetclover increased grass N concentration more than the other two legume species in late spring and mid-summer but not in autumn of each year. Similar effects were detected in grass C concentrations, but differences were smaller. By yr 4 (2010), legumes increased N concentration in associated grasses compared with grasses grown alone at each sampling date. Most grass species × treatment interactions were observed in autumn (P < 0.05) and were largely a result of continued effects of legume inclusions on N concentrations in associated grasses, while N fertilization effects decreased by autumn. Higher soil POM-N concentrations under grass-legume mixtures than grass monocultures were detected by 2009 and 2010 (P < 0.05). Bothriochloa ischaemum monoculture plots generally had greater soil POM-N than either B.… Advisors/Committee Members: Allen, Vivien G. (Committee Chair), Bouton, Joe (committee member), Galyean, Michael L. (committee member), Kellison, Rick (committee member), Wester, David B. (committee member).

Subjects/Keywords: Acid detergent fiber (ADF); Crude protein (CP); Dry matter (DM); Dry matter digestibility (DMD); Evapotranspiration (ET); In-vitro dry matter digestibility (IVDMD); Neutral detergent fiber (NDF); Particulate organic matter (POM); Particulate organic matter carbon (POM-C); Particulate organic matter nitrogen (POM-N); Soil organic matter (SOM); Standard error (SE)

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APA (6^th Edition):

Cui, S. (2011). Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/ETD-TTU-2011-08-1711

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

Chicago Manual of Style (16^th Edition):

Cui, Song. “Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock.” 2011. Thesis, Texas Tech University. Accessed January 17, 2021. http://hdl.handle.net/2346/ETD-TTU-2011-08-1711.

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

MLA Handbook (7^th Edition):

Cui, Song. “Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock.” 2011. Web. 17 Jan 2021.

Vancouver:

Cui S. Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock. [Internet] [Thesis]. Texas Tech University; 2011. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1711.

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

Council of Science Editors:

Cui S. Finding Forage Legumes Adapted to West Texas for Reduction of Water and Energy Use and Improvement of Nutritive value for Livestock. [Thesis]. Texas Tech University; 2011. Available from: http://hdl.handle.net/2346/ETD-TTU-2011-08-1711

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

13. Tulip, Laura. Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions.

Degree: PhD, 2019, University of Edinburgh

URL: http://hdl.handle.net/1842/35893

► The export of particulate organic matter (POM) from the surface ocean to depth forms the basis of the biological carbon pump (BCP). It is important… (more)

▼ The export of particulate organic matter (POM) from the surface ocean to depth forms the basis of the biological carbon pump (BCP). It is important for modulating atmospheric carbon dioxide concentrations, amongst a range of other significant processes. Coastal zones play a significant role in organic matter cycling and burial, and have the capacity to affect a range of important biogeochemical cycles at a global scale. Determining the source and biogeochemical composition of POM, is essential in order to determine its fate; whether POM is recycled in the water column, or exported to depth. POM is heterogeneous in nature with inputs from terrestrial, estuarine, and marine sources. Diverse sources of POM result in a wide spectrum of POM present in the water column, which can be loosely categorised into suspended particulate material (SPM) and sinking fractions. These fractions can be compositionally distinct, and contribute to carbon export to different extents. This thesis addresses key questions surrounding characterisation of POM of these different fractions, determining its origin, and reactivity. The multifaceted approach taken includes detailed micro-phytoplankton community dynamics, molecular-level biogeochemical analysis of POM, and reactivity (using oxygen consumption as a proxy for reactivity) measures across a seasonal cycle and is unprecedented. An intensive sampling campaign was carried out in highly dynamic coastal waters in the Firth of Lorne, western Scotland. Microphytoplankton community composition, biochemical composition, and environmental drivers (wind speed and pycnocline depth) were found to be related to community sedimentation rates. The origin of POM was mixed as indicated by C:N ratio, d13C values, and fatty acid biomarkers. SPM had a larger terrigenous input compared to sediment trap material and sediments. A seasonal shift in SPM source from marine dominated POM in spring, to increasing terrestrial inputs into winter, which corresponded to periods of high rainfall, was observed. SPM was more labile relative to sinking and benthic fractions, and generally concentrations of organic carbon and nitrogen, amino acids, fatty acids, and carbohydrates decreased with depth. The decreasing trend in reactivity observed in SPM and sediment trap material from summer to winter, coincided with the shift in source material, with lowest reactivity occurring when terrigenous inputs were highest. Relationships were found between SPM and sediment trap reactivity, and lability parameters such as amino acids, fatty acids, and carbohydrate concentration. The BCP is complex, and a good understanding of POM characteristics and composition is essential in order to better understand POM cycling and export efficiency. This is especially important given the predicted changes to the BCP as a result of a changing climate.

Subjects/Keywords: particulate organic matter; biological carbon pump; Firth of Lorne; microphytoplankton; suspended particulate material; terrestrial input; POM cycling

14 more images…

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APA (6^th Edition):

Tulip, L. (2019). Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/35893

Chicago Manual of Style (16^th Edition):

Tulip, Laura. “Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions.” 2019. Doctoral Dissertation, University of Edinburgh. Accessed January 17, 2021. http://hdl.handle.net/1842/35893.

MLA Handbook (7^th Edition):

Tulip, Laura. “Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions.” 2019. Web. 17 Jan 2021.

Vancouver:

Tulip L. Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions. [Internet] [Doctoral dissertation]. University of Edinburgh; 2019. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1842/35893.

Council of Science Editors:

Tulip L. Biogeochemical characterisation of particulate organic matter at sequential stages of transport in suspended, sinking, and benthic fractions. [Doctoral Dissertation]. University of Edinburgh; 2019. Available from: http://hdl.handle.net/1842/35893

14. Mankowski, Joshua. Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River.

Degree: Biological Sciences - Ecology and Natural Resources: M.S., Biology, 2017, St. Cloud State University

URL: https://repository.stcloudstate.edu/biol_etds/28

► Through the continual flow of water in lotic systems, upstream impacts may be observed in downstream reaches. The River Continuum Concept classifies and describes… (more)

Subjects/Keywords: River Continuum Concept; Serial Discontinuity Concept; Surface-Release Impoundments; Fine Particulate Organic Matter

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APA (6^th Edition):

Mankowski, J. (2017). Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River. (Masters Thesis). St. Cloud State University. Retrieved from https://repository.stcloudstate.edu/biol_etds/28

Chicago Manual of Style (16^th Edition):

Mankowski, Joshua. “Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River.” 2017. Masters Thesis, St. Cloud State University. Accessed January 17, 2021. https://repository.stcloudstate.edu/biol_etds/28.

MLA Handbook (7^th Edition):

Mankowski, Joshua. “Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River.” 2017. Web. 17 Jan 2021.

Vancouver:

Mankowski J. Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River. [Internet] [Masters thesis]. St. Cloud State University; 2017. [cited 2021 Jan 17]. Available from: https://repository.stcloudstate.edu/biol_etds/28.

Council of Science Editors:

Mankowski J. Quantity and Quality of Suspended Particulate Organic Matter Upstream and Downstream of a Series of Surface-Release Impoundments on the Upper Mississippi River. [Masters Thesis]. St. Cloud State University; 2017. Available from: https://repository.stcloudstate.edu/biol_etds/28

Virginia Tech

15. Li, Jinling. Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling.

Degree: PhD, Crop and Soil Environmental Sciences, 2013, Virginia Tech

URL: http://hdl.handle.net/10919/49585

► Land application of biosolids has been demonstrated to improve nutrient availability (mainly N and P) and improve organic matter in soils, but the effects of… (more)

▼ Land application of biosolids has been demonstrated to improve nutrient availability (mainly N and P) and improve organic matter in soils, but the effects of biosolids on C sequestration and N cycling in the Mid-Atlantic region is not well understood. The objectives were: 1) to investigate soil C sequestration at sites with a long-term history of biosolids either in repeated application or single large application; 2) to characterize and compare soil C chemistry using advanced 13C nuclear magnetic resonance (NMR) and C (1s) near edge x-ray absorption fine structure (NEXAFS) spectroscopic techniques; and 3) to compare biosolids types and tillage practices on short-term N availability in the Coastal Plain soils. Biosolids led to C accumulation in the soil surface (< 15 cm) after long-time application in both Piedmont and Coastal Plain soils. The C saturation phenomenon occurred in Coastal Plain soils, thus additional soil C accumulation was not achieved by increasing C inputs from biosolids to the Coastal Plain. Soil organic C from profiles in the field sites was not different at depths below the plow layer (15-60 cm). The quantitative NMR analyses concluded that O-alkyl C was the dominant form in the particulate organic matter (POM), followed by aromatic C, alkyl C, COO/N-C=O, aromatic C-O, OCH3 / NCH and ketones and aldehydes. The aliphatic C and aromatic C were enriched but the O-alkyl C was decreased in the biosolids-amended soils. The changes indicated that the biosolids-derived soil C was more decomposed and, thus, more stable than the control. The NEXAFS spectra showed that O-alkyl C was the dominant form in the POM extracted from biosolids-amended soils, followed by aromatic C, alkyl C, carboxylic C and phenolic C groups. These results were similar to those from NMR analysis. The regression and correlation analyses of C functional groups in the POM between NEXAFS and NMR indicated that both techniques had good sensitivity for the characterization of C from biosolids-amended soils. To evaluate short-term biosolids N availability, a three-year field study to investigate the effects of lime-stabilized (LS) and anaerobically digested (AD) biosolids on N availability in a corn-soybean rotation under conventional tillage and no-tillage practices was set up in 2009-2011. Results showed that both LS and AD biosolids increased spring soil nitrate N, plant tissue N at silking, post-season corn stalk nitrate N, grain yield, and soil total N by the end of the growing season. The same factors used to calculate plant available N for incorporated biosolids can be used on biosolids applied to no-till systems in coarse-textured soils. All these results indicated that the application of biosolids affects the long-term quantification and qualification of soil organic C and also improve short-term N availability in the Mid-Atlantic region. Advisors/Committee Members: Evanylo, Gregory K. (committeechair), Alley, Marcus M. (committee member), Spargo, John Thomas (committee member), Shang, Chao (committee member), Daniels, W. Lee (committee member).

Subjects/Keywords: biosolids; carbon sequestration; particulate organic matter; spectroscopy; nitrogen availability; anaerobic digestion; lime stab

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APA (6^th Edition):

Li, J. (2013). Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/49585

Chicago Manual of Style (16^th Edition):

Li, Jinling. “Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling.” 2013. Doctoral Dissertation, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/49585.

MLA Handbook (7^th Edition):

Li, Jinling. “Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling.” 2013. Web. 17 Jan 2021.

Vancouver:

Li J. Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling. [Internet] [Doctoral dissertation]. Virginia Tech; 2013. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/49585.

Council of Science Editors:

Li J. Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling. [Doctoral Dissertation]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/49585

University of Arizona

16. Condon, Katherine Elyse. Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes .

Degree: 2013, University of Arizona

URL: http://hdl.handle.net/10150/301557

► This study investigates translocation of particulate carbon and nitrogen from burned and unburned catchments within New Mexico's Valles Caldera National Preserve following severe wildfire. My… (more)

Subjects/Keywords: Fluvial erosion; Nitrogen; Particulate organic matter; Total suspended sediment; Wildifire; Hydrology; Carbon

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APA (6^th Edition):

Condon, K. E. (2013). Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/301557

Chicago Manual of Style (16^th Edition):

Condon, Katherine Elyse. “Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes .” 2013. Masters Thesis, University of Arizona. Accessed January 17, 2021. http://hdl.handle.net/10150/301557.

MLA Handbook (7^th Edition):

Condon, Katherine Elyse. “Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes .” 2013. Web. 17 Jan 2021.

Vancouver:

Condon KE. Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes . [Internet] [Masters thesis]. University of Arizona; 2013. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10150/301557.

Council of Science Editors:

Condon KE. Quantifying Catchment-Scale Particulate Organic Matter (POM) Loss Following Fire, Relative to Background POM Fluxes . [Masters Thesis]. University of Arizona; 2013. Available from: http://hdl.handle.net/10150/301557

University of Southern California

17. Daher, Nancy. Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications.

Degree: PhD, Environmental Engineering, 2013, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/326899/rec/5884

► Compelling epidemiological and toxicological evidence indicates consistent associations between exposure to particulate matter (PM) and increased risk of adverse health outcomes. Many of these health… (more)

▼ Compelling epidemiological and toxicological evidence indicates consistent associations between exposure to particulate matter (PM) and increased risk of adverse health outcomes. Many of these health effects may result, at least in part, from cellular oxidative stress. However, although an association between PM and health endpoints has been observed, the contribution of specific particle components to aerosol toxicity remains unknown. Most of the evidence is based on mass measures of PM albeit aerosol mass is probably only a surrogate for the real causative particle components. An accurate identification of specific agents of aerosol toxicity, with subsequent targeted emission controls, necessitates an improved characterization of PM composition (chemical and physical), variability (temporal and spatial), sources and their relation to particle oxidative potential. ❧ This dissertation focused on determining the chemical and oxidative properties of size-resolved PM (PM10-2.5, PM2.5, PM2.5-0.25, PM0.25) in distinct urban and roadway environments. Target sites ranged from highly-polluted metropolitans to desert-like locations in the Greater Beirut area, Milan and the Los Angeles basin. PM chemical composition was determined by conducting a chemical mass closure. Specific emphasis was given to the organic and elemental aerosol fractions. PM oxidative potential was quantified using a macrophage-based in vitro reactive oxygen species (ROS) assay. Its association with size-fractionated and chemically-speciated particle components was determined using linear regression analysis. The role of water-soluble metals in PM-induced redox activity was particularly investigated. At near-freeway and urban settings in the Greater Beirut area, Mn, Cu, Co, V, Ni and Zn, many of which are air toxics, were mostly distributed in PM2.5-0.25 and PM0.25, with high water-solubility in these modes (> 60%). These physico-chemical characteristics may lead to increased adverse biological effects. Of particular concern were water-soluble metals which strongly correlated with ROS formation. In PM10-2.5, Mn and Co, which are road dust components, were highly associated with ROS-activity. Cu -a tracer of vehicular abrasion- and Co -a road dust element- were potential mediators of PM2.5-0.25-based ROS-activity. In PM0.25, V and Ni, both originating from fuel oil combustion, were strongly correlated with ROS formation. Water-soluble organic carbon was also implicated in PM2.5-induced ROS generation. Moreover, intrinsic (i.e. PM-mass normalized) ROS-activity displayed a particle size-dependency, with lowest activity associated with PM10-2.5. The intrinsic ROS-activity of PM collected from a variety of worldwide urban settings, including Milan, Beirut and Los Angeles, was also quantitatively assessed and compared across areas. Additionally, monthly variation in primary and secondary PM2.5 sources was quantified using the Chemical Mass Balance (CMB) model and fixed tracer-to-OC ratios applied to fine PM collected at a centrally-located urban site in Milan… Advisors/Committee Members: Sioutas, Constantinos (Committee Chair), Henry, Ronald C. (Committee Member), Finch, Caleb E. (Committee Member), Fruin, Scott (Committee Member).

Subjects/Keywords: particulate matter; mass closure; organic speciation; redox activity; source apportionment; urban areas

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APA (6^th Edition):

Daher, N. (2013). Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/326899/rec/5884

Chicago Manual of Style (16^th Edition):

Daher, Nancy. “Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications.” 2013. Doctoral Dissertation, University of Southern California. Accessed January 17, 2021. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/326899/rec/5884.

MLA Handbook (7^th Edition):

Daher, Nancy. “Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications.” 2013. Web. 17 Jan 2021.

Vancouver:

Daher N. Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications. [Internet] [Doctoral dissertation]. University of Southern California; 2013. [cited 2021 Jan 17]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/326899/rec/5884.

Council of Science Editors:

Daher N. Size-resolved particulate matter (PM) in urban areas: toxico-chemical characteristics, sources, trends and health implications. [Doctoral Dissertation]. University of Southern California; 2013. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/326899/rec/5884

Virginia Tech

18. Guse, Paige Marie. VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions.

Degree: MS, Mining Engineering, 2020, Virginia Tech

URL: http://hdl.handle.net/10919/97993

► Diesel Particulate matter (DPM) is the solid portion of diesel exhaust and can cause chronic and acute illness. Underground miners can regularly be exposed to… (more)

▼ Diesel Particulate matter (DPM) is the solid portion of diesel exhaust and can cause chronic and acute illness. Underground miners can regularly be exposed to high concentrations of DPM over long periods of time, therefore DPM must be monitored. Total Carbon (TC) is the sum of particulate organic and elemental carbon (POC and EC) and is used as the surrogate measurement to represent DPM. The standard method of DPM sample analysis is subject to volatile organic carbon (VOC) interference, therefore a dynamic blank correction is used. However, in some cases, the dynamic blank over- or under-corrects. This thesis presents studies to better understand the source(s) of VOC interference and possible solutions. Three existing datasets containing information from blank samples and laboratory and field DPM samples were investigated for instances of VOC interference resulting in an overcorrection. Such instances were limited to blank and low mass samples. A field study looked into the possibility of sampling materials as a source of VOC that may cause overcorrection when using the dynamic blank method. Blank samples were assembled to test five sampling materials as well as various sample storage conditions. It was discovered that all of the sample materials tested contributed VOC and, as expected, higher storage temperatures and longer storage durations increase the amount of VOC. A second field study explored thermal separation of VOC and POC as a possible alternative to the dynamic blank correction method. Two sets of DPM samples were collected from two locations in an underground stone mine and one set of ambient particulate matter samples was collected from a highly trafficked truck stop. The temperature of 175°C was used for this preliminary investigation. Results indicate that the effectiveness of temperature separation may depend on sample concentration and composition. To better understand VOC and POC evolution characteristic, further testing with a wide range of sample mass and composition, as well as, different temperatures is suggested. The work presented in this thesis highlights the difficulty in accurately measuring POC. Advisors/Committee Members: Sarver, Emily Allyn (committeechair), Keles, Cigdem (committee member), Noble, Christopher Aaron (committee member).

Subjects/Keywords: Diesel Particulate Matter; DPM; Method 5040; Thermal Optical Analysis; Organic Carbon; VOC

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APA (6^th Edition):

Guse, P. M. (2020). VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/97993

Chicago Manual of Style (16^th Edition):

Guse, Paige Marie. “VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions.” 2020. Masters Thesis, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/97993.

MLA Handbook (7^th Edition):

Guse, Paige Marie. “VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions.” 2020. Web. 17 Jan 2021.

Vancouver:

Guse PM. VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions. [Internet] [Masters thesis]. Virginia Tech; 2020. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/97993.

Council of Science Editors:

Guse PM. VOC Interference with Standard Diesel Particulate Analysis for Mine Samples: Exploring Sources and Possible Solutions. [Masters Thesis]. Virginia Tech; 2020. Available from: http://hdl.handle.net/10919/97993

University of Montana

19. Ormord, James Kevin. Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska.

Degree: MS, 2011, University of Montana

URL: https://scholarworks.umt.edu/etd/723

► Ambient particulate matter (PM) levels are of great importance to many areas around the world for both environmental and health concerns. It is well known… (more)

▼ Ambient particulate matter (PM) levels are of great importance to many areas around the world for both environmental and health concerns. It is well known that many sources of PM are anthropogenic in nature, including sources such as the combustion of petroleum products and wood. As per the Clean Air Act of 1970, the US EPA has established a National Ambient Air Quality Standard (NAAQS) of 35µg/m3 for a 24 hour average and 15µg/m3 for an annual average of ambient PM2.5 to improve the quality of air and reduce occurrences of respiratory illness resulting from exposure to high levels of PM2.5. Fairbanks, the largest city in the interior of Alaska, experiences harsh winters with prolonged temperature inversions and calm winds. Due to these factors, there is an accumulation of PM in the valley, resulting in regular violations of the 24 hour NAAQS during the winter and thus in the Fairbanks North Star Borough area being considered a nonattainment area for PM2.5 by the US EPA. Previous chemical mass balance (CMB) studies have shown that the majority of the Fairbanks wintertime PM2.5 is from residential wood combustion. But these CMB studies also identified a relatively high fraction (up to 20%) of sulfate of unspecified origin. The goal of this work is to paint a clearer picture of the sources of the PM2.5 problem in Fairbanks, AK with a focus on the potential sources of sulfate. This is achieved by quantifying select organic species (hopanes, steranes, picene, and thiophenes) in Fairbanks PM2.5. These compounds have been reported to be found in emissions from combustion of various fossil fuels. The measured chemical composition of Fairbanks PM2.5 is compared to reported composition for PM2.5 in other air sheds and to published source profiles. Several fuels received from Fairbanks were analyzed as well for the selected chemical markers in an effort to identify potential sources of these markers. Fairbanks PM2.5 was found to contain relatively high levels of all of the markers analyzed. Comparisons of the chemical composition of Fairbanks PM2.5 to other air sheds and to source profiles revealed that Fairbanks PM2.5 is heavily impacted from fossil fuel use. Thus, while it remains clear that Fairbanks PM2.5 is impacted predominantly by wood smoke from residential heating, it is now also clear that fossil fuel combustion is a major contributor. High levels of picene indicate a significant contribution of coal combustion, while high levels of thiophenes very likely indicate a significant contribution from no. 2 fuel oil combustion. High levels of select organo-sulfur compounds in no. 2 Fuel oil suggest that this fuel used in Fairbanks for residential heating and power production is very likely a significant source of the sulfate.

Subjects/Keywords: chemical mass balance; GC-MS; organic tracer; particulate matter; PM chemical marker; PM2.5; source apportionment

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APA (6^th Edition):

Ormord, J. K. (2011). Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska. (Masters Thesis). University of Montana. Retrieved from https://scholarworks.umt.edu/etd/723

Chicago Manual of Style (16^th Edition):

Ormord, James Kevin. “Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska.” 2011. Masters Thesis, University of Montana. Accessed January 17, 2021. https://scholarworks.umt.edu/etd/723.

MLA Handbook (7^th Edition):

Ormord, James Kevin. “Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska.” 2011. Web. 17 Jan 2021.

Vancouver:

Ormord JK. Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska. [Internet] [Masters thesis]. University of Montana; 2011. [cited 2021 Jan 17]. Available from: https://scholarworks.umt.edu/etd/723.

Council of Science Editors:

Ormord JK. Organic Tracer Analyses and Receptor Modeling of PM2.5 in Fairbanks, Alaska. [Masters Thesis]. University of Montana; 2011. Available from: https://scholarworks.umt.edu/etd/723

Queensland University of Technology

20. Hedayat, Farzaneh. Investigation of the molecular probes for PM oxidative capacity measurements.

Degree: 2016, Queensland University of Technology

URL: https://eprints.qut.edu.au/98552/

► This thesis improved our understanding of the performance of various assays that are employed to investigate the oxidative potential (OP) of the particulate matter (PM)… (more)

Subjects/Keywords: Combustion aerosols; combustion-generated particulate matter; diesel exhaust; biodiesel exhaust; health effects of particulate matter; oxygenated organic aerosols; ROS; oxidative potential; profuorescent nitroxides; BPEA-nit

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hedayat, F. (2016). Investigation of the molecular probes for PM oxidative capacity measurements. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/98552/

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

Chicago Manual of Style (16^th Edition):

Hedayat, Farzaneh. “Investigation of the molecular probes for PM oxidative capacity measurements.” 2016. Thesis, Queensland University of Technology. Accessed January 17, 2021. https://eprints.qut.edu.au/98552/.

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

MLA Handbook (7^th Edition):

Hedayat, Farzaneh. “Investigation of the molecular probes for PM oxidative capacity measurements.” 2016. Web. 17 Jan 2021.

Vancouver:

Hedayat F. Investigation of the molecular probes for PM oxidative capacity measurements. [Internet] [Thesis]. Queensland University of Technology; 2016. [cited 2021 Jan 17]. Available from: https://eprints.qut.edu.au/98552/.

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

Council of Science Editors:

Hedayat F. Investigation of the molecular probes for PM oxidative capacity measurements. [Thesis]. Queensland University of Technology; 2016. Available from: https://eprints.qut.edu.au/98552/

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

Queensland University of Technology

21. Stevanovic, Svetlana. Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique.

Degree: 2013, Queensland University of Technology

URL: https://eprints.qut.edu.au/62029/

► Following the growing need for adoption of alternative fuels, this project aimed at getting more information on the oxidative potential of biodiesel particulate matter. Within… (more)

Subjects/Keywords: combustion aerosols; combustion-generated particulate matter; diesel exhaust; reactive oxygen species; profluorescent nitroxides; oxidative potential; oxygenated organic aerosols; volatility; health effects of particulate matter; free radicals

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APA (6^th Edition):

Stevanovic, S. (2013). Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/62029/

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

Chicago Manual of Style (16^th Edition):

Stevanovic, Svetlana. “Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique.” 2013. Thesis, Queensland University of Technology. Accessed January 17, 2021. https://eprints.qut.edu.au/62029/.

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

MLA Handbook (7^th Edition):

Stevanovic, Svetlana. “Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique.” 2013. Web. 17 Jan 2021.

Vancouver:

Stevanovic S. Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique. [Internet] [Thesis]. Queensland University of Technology; 2013. [cited 2021 Jan 17]. Available from: https://eprints.qut.edu.au/62029/.

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

Council of Science Editors:

Stevanovic S. Investigation of the chemical and physical basis of oxidative stress generated by particulate matter using the profluorescent probe technique. [Thesis]. Queensland University of Technology; 2013. Available from: https://eprints.qut.edu.au/62029/

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

22. Geetha, R. Modelling of Geochemical Processes in Mangrove Ecosystem.

Degree: 2002, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/102

► The mangrove ecosystem is one of the earth’s most endangered ecosystems. In this study, geochemical features of three mangrove ecosystems, Mangalavanam, Vypeen and Nettoor were… (more)

Subjects/Keywords: Mangrove ecosystem; Geochemical processes; Particulate organic matter; Organic compounds

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APA (6^th Edition):

Geetha, R. (2002). Modelling of Geochemical Processes in Mangrove Ecosystem. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/102

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

Chicago Manual of Style (16^th Edition):

Geetha, R. “Modelling of Geochemical Processes in Mangrove Ecosystem.” 2002. Thesis, Cochin University of Science and Technology. Accessed January 17, 2021. http://dyuthi.cusat.ac.in/purl/102.

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

MLA Handbook (7^th Edition):

Geetha, R. “Modelling of Geochemical Processes in Mangrove Ecosystem.” 2002. Web. 17 Jan 2021.

Vancouver:

Geetha R. Modelling of Geochemical Processes in Mangrove Ecosystem. [Internet] [Thesis]. Cochin University of Science and Technology; 2002. [cited 2021 Jan 17]. Available from: http://dyuthi.cusat.ac.in/purl/102.

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

Council of Science Editors:

Geetha R. Modelling of Geochemical Processes in Mangrove Ecosystem. [Thesis]. Cochin University of Science and Technology; 2002. Available from: http://dyuthi.cusat.ac.in/purl/102

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

Iowa State University

23. Long, Leigh Ann Marie. Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment.

Degree: 2015, Iowa State University

URL: https://lib.dr.iastate.edu/etd/14609

► Multispecies riparian buffers (MRBs) are a conservation practice that protects water quality and prevents soil erosion by improving soil quality including aggregate stability, particulate organic… (more)

▼ Multispecies riparian buffers (MRBs) are a conservation practice that protects water quality and prevents soil erosion by improving soil quality including aggregate stability, particulate organic matter (POM), and water infiltration. USDA Conservation Reserve Program MRB contracts last 10-15 years; evidence shows MRB soil quality may improve within 3-7 years, but there is little data on how MRB soils perform after contracts typically expire. Slaked soil aggregate stability was measured in a 20-21 year-old MRB in central Iowa at the surface (0-15 cm) and used to calculate the indices mean weight diameter (MWD), geometric mean diameter (GMD), and percent water-stable macroaggregates (%WSA). The MRB contained zones of switchgrass (Panicum virgatum L. ‘Cave-in-Rock’), hybrid poplar (Populus spp.), and cool-season grass; results were compared with an adjacent crop field, a formerly grazed pasture, and a natural riparian forest. Bulk density, total soil carbon, and POM were also measured. A Cornell sprinkle infiltrometer was used to measure infiltration in a 10-year old tree and cool-season grass MRB, and in the switchgrass, cool-season grass and silver maple zones of the MRB used in the soil aggregate study. MRBs were compared with trafficked and non-trafficked crop interrows in a nearby crop field. Perennial vegetation had greater MWD, GMD, %WSA, and total SOC compared to the crop field. Data collected in 1997 showed no significant differences in %WSA or MWD between switchgrass and crop field, but did between cool-season grasses and crop field. However, %WSA and MWD under switchgrass increased 45.8% and 120.5%, respectively, since 1997; under cool-season grasses %WSA and MWD increased 17.9% and 34.3%, respectively, since 1997, but decreased by 37.0% and 35.2% under row crops. Sixty-minute cumulative infiltration did not significantly differ among MRBs, but was greater than trafficked crop interrows, and was best explained by rainfall rate, bulk density, and initial saturation. Percent rooted vegetation was not a significant factor explaining infiltration in MRBs. Results suggest MRBs do continue to positively impact selected soil physical parameters. Switchgrass may take longer to improve soil quality parameters in MRBs. Soil quality improvements depend upon the edaphic factors and the amount of disturbance on site.

Subjects/Keywords: Sustainable Agriculture; aggregate stability; infiltration; particulate organic matter; riparian buffer; soil organic carbon; Ecology and Evolutionary Biology; Forest Sciences; Soil Science

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APA (6^th Edition):

Long, L. A. M. (2015). Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/14609

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

Chicago Manual of Style (16^th Edition):

Long, Leigh Ann Marie. “Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment.” 2015. Thesis, Iowa State University. Accessed January 17, 2021. https://lib.dr.iastate.edu/etd/14609.

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

MLA Handbook (7^th Edition):

Long, Leigh Ann Marie. “Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment.” 2015. Web. 17 Jan 2021.

Vancouver:

Long LAM. Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment. [Internet] [Thesis]. Iowa State University; 2015. [cited 2021 Jan 17]. Available from: https://lib.dr.iastate.edu/etd/14609.

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

Council of Science Editors:

Long LAM. Impacts of riparian buffer vegetation on soil quality physical parameters, 20-23 years after initial riparian buffer establishment. [Thesis]. Iowa State University; 2015. Available from: https://lib.dr.iastate.edu/etd/14609

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

Portland State University

24. Boris, Alexandra Jeanne. Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids.

Degree: MS(M.S.) in Chemistry, Chemistry, 2012, Portland State University

URL: https://pdxscholar.library.pdx.edu/open_access_etds/544

► Understanding the composition of atmospheric organic particulate matter (OPM) is essential for predicting its effects on climate, air quality, and health. However, the polar… (more)

▼ Understanding the composition of atmospheric organic particulate matter (OPM) is essential for predicting its effects on climate, air quality, and health. However, the polar oxygenated fraction (PO-OPM), which includes a significant mass contribution from carboxylic acids, is difficult to speciate and quantitatively determine by current analytical methods such as gas chromatography-mass spectrometry (GC-MS). The method of chemical derivatization and two-dimensional GC with time of flight MS (GC×GC/TOF-MS) was examined in this study for its efficacy in: 1) quantifying a high percentage of the total organic carbon (TOC) mass of a sample containing PO-OPM; 2) quantitatively determining PO-OPM components including carboxylic acids at atmospherically relevant concentrations; and 3) tentatively identifying PO-OPM components. Two derivatization reagent systems were used in this study: BF₃/butanol for the butylation of carboxylic acids, aldehydes, and acidic ketones, and BSTFA for the trimethylsilylation (TMS) of carboxylic acids and alcohols. Three α-pinene ozonolysis OPM filter samples and a set of background filter samples were collected by collaborators in a University of California, Riverside environmental chamber. Derivatization/GC×GC TOF-MS was used to tentatively identify some previously unidentified α-pinene ozonolysis products, and also to show the characteristics of all oxidation products determined. Derivatization efficiencies as measured were 40-70% for most butyl derivatives, and 50-58% for most trimethylsilyl derivatives. A thermal optical method was used to measure the TOC on each filter, and a value of the quantifiable TOC mass using a gas chromatograph was calculated for each sample using GC×GC separation and the mass-sensitive response of a flame ionization detector (FID). The TOC quantified using TMS and GC×GC-FID (TMS/TOC<sub>GC×GC FID<sub>) accounted for 15-23% of the TOC measured by the thermal-optical method. Using TMS and GC×GC/TOF-MS, 8.85% of the thermal optical TOC was measured and 48.2% of the TMS/TOC<sub>GC×GC-FID<sub> was semi-quantified using a surrogate standard. The carboxylic acids tentatively identified using TMS and GC×GC/TOF-MS accounted for 8.28% of the TOC measured by thermal optical means. GC×GC TOF-MS chromatograms of derivatized analytes showed reduced peak tailing due in part to the lesser interactions of the derivatized analytes with the stationary phase of the chromatography column as compared to the chromatograms of underivatized samples. The improved peak shape made possible the greater separation, quantification, and identification of high polarity analytes. Limits of detection using derivatization and GC×GC/TOF-MS were μL injected for a series of C2-C6 di-acids, cis-pinonic acid, and dodecanoic acid using both butylation and TMS. Derivatization with GC×GC/TOF-MS was therefore effective for determining polar oxygenated compounds at low concentrations, for determining specific oxidation products not previously identified in OPM, and also for characterizing the probable… Advisors/Committee Members: James F. Pankow.

Subjects/Keywords: Organic particulate matter; Secondary organic aerosols; BF3/Butanol; Atmospheric chemistry; Particles – Research; Atmospheric aerosols – Measurement; Derivatization

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APA (6^th Edition):

Boris, A. J. (2012). Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids. (Masters Thesis). Portland State University. Retrieved from https://pdxscholar.library.pdx.edu/open_access_etds/544

Chicago Manual of Style (16^th Edition):

Boris, Alexandra Jeanne. “Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids.” 2012. Masters Thesis, Portland State University. Accessed January 17, 2021. https://pdxscholar.library.pdx.edu/open_access_etds/544.

MLA Handbook (7^th Edition):

Boris, Alexandra Jeanne. “Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids.” 2012. Web. 17 Jan 2021.

Vancouver:

Boris AJ. Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids. [Internet] [Masters thesis]. Portland State University; 2012. [cited 2021 Jan 17]. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/544.

Council of Science Editors:

Boris AJ. Toward the Complete Characterization of Atmospheric Organic Particulate Matter: Derivatization and Two-Dimensional Comprehensive Gas Chromatography/Time of Flight Mass Spectrometry as a Method for the Determination of Carboxylic Acids. [Masters Thesis]. Portland State University; 2012. Available from: https://pdxscholar.library.pdx.edu/open_access_etds/544

University of Melbourne

25. Gonzalez-Rodriguez, Arturo Ismael. How does deforestation affect the functional links between riparian zones and stream channels?.

Degree: 2018, University of Melbourne

URL: http://hdl.handle.net/11343/234015

► Riparian vegetation is essential for headwater streams, as it regulates allochthonous inputs of coarse particulate organic matter (CPOM) delivered into streams. CPOM accumulates in patches… (more)

▼ Riparian vegetation is essential for headwater streams, as it regulates allochthonous inputs of coarse particulate organic matter (CPOM) delivered into streams. CPOM accumulates in patches across the streambed, these patches are sources of energy and shelter where ecological linkages between aquatic populations occur. This group of studies evaluate such relationships in Hughes Creek, Victoria, southern Australia. The first of these studies evaluates the evidence documented in 45 studies which were undertaken mostly in temperate or subtropical regions of the U.S.A., Canada, Spain and Australia. The main focus of these works was to evaluate the effect of deforestation upon allochthonous inputs of CPOM, often in first and second order streams. Most studies addressed airborne inputs only, while lateral surface inputs, or downstream transport of CPOM were not commonly studied. Hedges’ effect size (g) was calculated for allochthonous inputs data from the 45 articles and plotted against deforestation. A threshold for airborne inputs and benthic organic matter (BOM) standing stock was observed when deforestation reached 70%. At that level of deforestation, effect sizes decreased by up to -5 standard deviations. The second study encompassed a field survey where forested and low forested sites along the one stream were evaluated. The survey required the collection of allochthonous inputs monthly for one year, where airborne, lateral surface transfer (LST), and drifting CPOM fractions were collected in sites with contrasting forest cover. Sites with intact vegetation showed high inputs (14 kg m-2 DW year-1), while deforested reaches showed lower airborne inputs (9.25 kg m-2 DW year-1). LST inputs represented 42% of allochthonous inputs in forested reaches, and 37.5% in deforested sites. The transport of CPOM downstream was similar between forested and deforested sites (23-25 kg DW year-1). Given this similarity in CPOM transportation, and that the majority of streams in Victoria are deforested, patches of riparian forest might be an attractive management option for restoration/management of streams. However, it is necessary to be mindful of the scope and limitations of forested patches along streams, as they might not provide resources to neighbouring areas. Rather, forested sections tend to retain most of their allochthonous inputs within their boundaries. The third study of this thesis comprises a field survey where patches of CPOM, located on the streambed of forested and deforested reaches, were collected in Summer, Spring and Winter. CPOM was separated intro fractions of leaves, bark and twigs. It was found that the type of cover did not modify the mass of CPOM fractions between forested and deforested reaches (p > 0.05). However, the results show significant differences between Sites within Forest Cover for all fractions, with exception of leaf material. The dominant patterns suggest high variation between sites and shifts between seasons. In relation to the contribution of each fraction provided to CPOM benthic…

Subjects/Keywords: CPOM; coarse particulate organic matter; allochthonous inputs; benthic organic matter; deforestation; riparian vegetation; headwater streams; deforestation; Density; patch; size; orientation; stream; macroinvertebrates

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APA (6^th Edition):

Gonzalez-Rodriguez, A. I. (2018). How does deforestation affect the functional links between riparian zones and stream channels?. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/234015

Chicago Manual of Style (16^th Edition):

Gonzalez-Rodriguez, Arturo Ismael. “How does deforestation affect the functional links between riparian zones and stream channels?.” 2018. Doctoral Dissertation, University of Melbourne. Accessed January 17, 2021. http://hdl.handle.net/11343/234015.

MLA Handbook (7^th Edition):

Gonzalez-Rodriguez, Arturo Ismael. “How does deforestation affect the functional links between riparian zones and stream channels?.” 2018. Web. 17 Jan 2021.

Vancouver:

Gonzalez-Rodriguez AI. How does deforestation affect the functional links between riparian zones and stream channels?. [Internet] [Doctoral dissertation]. University of Melbourne; 2018. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/11343/234015.

Council of Science Editors:

Gonzalez-Rodriguez AI. How does deforestation affect the functional links between riparian zones and stream channels?. [Doctoral Dissertation]. University of Melbourne; 2018. Available from: http://hdl.handle.net/11343/234015

University of South Florida

26. Hoare, Ana Maria. From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay.

Degree: 2011, University of South Florida

URL: https://scholarcommons.usf.edu/etd/3151

► Increasing human populations and activities in coastal areas have led to high nutrient loading and estuarine ecosystem decline. Natural hydrological patterns in South Florida have… (more)

▼ Increasing human populations and activities in coastal areas have led to high nutrient loading and estuarine ecosystem decline. Natural hydrological patterns in South Florida have been drastically altered by changes in water management and land use practices. As a result Florida Bay has experienced a series of negative ecosystem effects including hypersalinity events, degradation of water quality, and harmful algal blooms and declines in upper trophic level populations. To remediate ecosystem decline in Florida's coastal ecosystems, the Comprehensive Everglades Restoration Plan proposes to restore a more natural hydrologic flow in the Everglades. It is expected hydrologic restoration efforts will change the amount, sources and ratios of dissolved nutrients (organic and inorganic) delivered to the bay potentially inducing an ecosystem response of changing structure and function in both planktic and benthic habitats. Identifying biogeochemical linkages between external nutrient inputs from the Everglades and internal cycling processes of Florida Bay is critical to understanding the effects of hydrological restoration and changing nutrient regimes on Florida Bay. A nitrogen (δ15N) and carbon (δ13C ) stable isotopic approach affords an effective means of assessing the fate of varying nutrient sources and delineating the dominant biogeochemical processes governing nutrient cycling in the bay. This study's main goals were to use stable isotopic analyses of C and N in dissolved and particulate materials to determine spatial and seasonal relationships between Everglades nutrient sources and their biological sinks in Florida Bay, examine the biogeochemical relationships among inorganic and organic components of the water column and benthos in Florida Bay, and assess future ecological response to changing nutrient inputs resulting from restoration efforts. A large east to west gradient from more enriched to more depleted δ15N values was noted in both dissolved nitrogen pools and organic components of the bay. This trend indicates that there are differing nutrient sources and biogeochemical processes influencing the various regions of the bay. Isotopic similarity of the dissolved nitrogen pools from the Everglades and particulate organic matter in the bay points to a strong relationship between both ecosystems. Everglades nutrient inputs delivered to the bay in the wet season directly influence ecological responses in the bay, in some cases increases in algal biomass. Seasonality also influences nitrogen transformations in the dissolved nitrogen pools and the sediments. During dry periods when there is little or no hydrologic flow from the Everglades into the bay, denitrification is a major process affecting nitrogen cycling in the eastern and central regions of the bay. During the wet periods, denitrification becomes suppressed and dissimilatory nitrate reduction (DNRA) is favored. Increased hydrologic flow brings fresh organic matter that fuels DNRA. There was a consistent spatial pattern from more depleted to more…

Subjects/Keywords: carbon isotopes; dissolved organic matter; nitrogen cycling; nitrogen isotopes; particulate organic matter; American Studies; Arts and Humanities; Other Oceanography and Atmospheric Sciences and Meteorology

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APA (6^th Edition):

Hoare, A. M. (2011). From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/3151

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

Chicago Manual of Style (16^th Edition):

Hoare, Ana Maria. “From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay.” 2011. Thesis, University of South Florida. Accessed January 17, 2021. https://scholarcommons.usf.edu/etd/3151.

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

MLA Handbook (7^th Edition):

Hoare, Ana Maria. “From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay.” 2011. Web. 17 Jan 2021.

Vancouver:

Hoare AM. From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay. [Internet] [Thesis]. University of South Florida; 2011. [cited 2021 Jan 17]. Available from: https://scholarcommons.usf.edu/etd/3151.

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

Council of Science Editors:

Hoare AM. From Source to Sink: An Isotopic Perspective on the Biogeochemical Relationship between the Everglades and Florida Bay. [Thesis]. University of South Florida; 2011. Available from: https://scholarcommons.usf.edu/etd/3151

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

27. Liu, Qiyuan, active 2013. Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries.

Degree: MSin Marine Science, Marine Science, 2013, University of Texas – Austin

URL: http://hdl.handle.net/2152/22098

► Dissolved organic matter (DOM) is crucial to carbon and nutrient biogeochemical cycling in the marine environment because it helps fuel heterotrophic microbial activity by providing… (more)

▼ Dissolved organic matter (DOM) is crucial to carbon and nutrient biogeochemical cycling in the marine environment because it helps fuel heterotrophic microbial activity by providing substrates for degradation and remineralization. This study shows that substantial production of DOM in Texas estuaries can result from the solar radiation-enhanced dissolution (photodissolution) of particulate organic matter (POM). Experimental results showed that 0.4-6.6 mg C L⁻¹gsed⁻¹ of dissolved organic carbon (DOC) and 0.03-0.93 mg N L⁻¹gsed⁻¹ of total dissolved nitrogen (TDN) can be produced from irradiated sediment suspensions within 24 hours, and further that photodissolution may augment DOC and TDN loads in Texas estuarine waters by as much as 3-85% and 4-75%, respectively. Photodissolution can also enhance the optical thickness of the water column via the release of chromophoric dissolved organic matter (CDOM), which may subsequently further enhance photochemical processes in surrounding waters. Photoproduced CDOM appears to be of relatively high molecular weight and dominantly exhibits humic-like fluorescence, suggesting that photodissolution primarily occurs for humic moieties. Photodissolution was also observed for sterilized sediment suspensions, indicating that photochemical degradation of POM is the primary pathway of DOM production during photodissolution, as opposed to microbial mediated degradation or stimulation of benthic primary production by benthic phytoplankton or algae. Environmental and mechanistic factors controlling the extent of photodissolution in Texas estuaries may include sediment desiccation, water organic content, and sediment characteristics (organic content and lability of POM). Desiccated-rewetted sediments suspended in artificial seawater under solar irradiation produced ~40% more DOC and TDN than wet sediments, indicating the sediment dry-wet cycle may alter the 3-D structure of sediment grain matrices and thus might be a major controlling factor of photodissolution in salt marsh systems. The organic content of water used in sediment suspensions did not significantly influence DOC or TDN photoproduction by itself, but the combined influence of water organic content and sediment dry-rewet event played a substantial role in controlling the extent of photodissolution. In contrast to the results in artificial seawater, wet sediments produced slightly more DOC ([Delta]DOC=0.10 mg C gsed⁻¹) and substantially more TDN ([Delta]TDN=0.14 mg N gsed⁻¹) than dry-rewetted sediments in organic-rich Nueces Marsh water during 24 hours of photoincubation. Photodissolution dominantly produced humic-like DOM even though biologically labile organic matter was available in sediments, indicating that photochemical reactions preferentially occur with humic-like rather than protein-like organic matter. DOC and TDN production during photodissolution was strongly proportional to the amount of POC in sediment suspensions. On average, 69.2 ± 11.0 mg C of DOC and 9 ± 3.1 mg N of TDN was produced from 1 g of organic carbon in… Advisors/Committee Members: Shank, Gerald Christopher (advisor).

Subjects/Keywords: Photochemistry; Dissolved organic matter; Particulate organic matter; Texas estuaries

…Particulate Organic Matter from Estuarine Suspended Sediments and the Mechanisms .1 1 Introduction… …Particulate Organic Matter in Texas Estuaries..............................................51 1… …Radiation-enhanced Dissolution (Photodissolution) of Particulate Organic Matter from… …Dissolved organic matter (DOM), primarily quantified as dissolved organic carbon (… …of the DOM pool is labeled as chromophoric dissolved organic matter (CDOM). CDOM…

10 more images…

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APA (6^th Edition):

Liu, Qiyuan, a. 2. (2013). Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/22098

Chicago Manual of Style (16^th Edition):

Liu, Qiyuan, active 2013. “Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries.” 2013. Masters Thesis, University of Texas – Austin. Accessed January 17, 2021. http://hdl.handle.net/2152/22098.

MLA Handbook (7^th Edition):

Liu, Qiyuan, active 2013. “Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries.” 2013. Web. 17 Jan 2021.

Vancouver:

Liu, Qiyuan a2. Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries. [Internet] [Masters thesis]. University of Texas – Austin; 2013. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2152/22098.

Council of Science Editors:

Liu, Qiyuan a2. Solar radiation-enhanced dissolution (photodissolution) of particulate organic matter in Texas estuaries. [Masters Thesis]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/22098

28. Martins, Bruno Henrique. Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo.

Degree: PhD, Química Analítica e Inorgânica, 2013, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24022014-111711/ ;

► O objetivo do presente estudo foi avaliar a dinâmica e reatividade da matéria orgânica do solo (MOS) e substâncias húmicas (SH) em duas situações distintas,… (more)

▼ O objetivo do presente estudo foi avaliar a dinâmica e reatividade da matéria orgânica do solo (MOS) e substâncias húmicas (SH) em duas situações distintas, no que concerne ao manejo de solo, práticas agroflorestais e condições climáticas, avaliando o potencial de sequestro de C e mitigação de efeitos do aumento do efeito estufa. O estudo foi conduzido em dois campos experimentais, sendo o primeiro, instalado em Beltsville - Maryland, Estados Unidos, sob coordenação do Departamento de Agricultura norte-americano (USDA/ARS), composto por sistemas agrícolas convencionais com manejo mínimo (PC), plantio direto sem manejo (PD) e orgânicos com plantio direto (2, 3 e 6 anos, com adição de esterco aviário). O segundo campo experimental, instalado em Itatinga - São Paulo, Brasil, compreende área de reflorestamento de floresta de eucalipto, em duas fazendas (Entre Rios - ER - e Areona - AN) com perfis de solo diferentes (Latossolo e Neossolo quartzarênico, respectivamente) com e sem adição de biossólido. Para o primeiro campo foram coletadas amostras de solo até 30 cm em 5 incrementos, sendo realizado, em seguida, o fracionamento físico da MOS, em matéria orgânica particulada livre (MOPl) e oclusa (MOPo) para análises de espectroscopia na região do infravermelho (MIR) e pirólise acoplada a GC/MS (PY-GC/MS). Para o segundo campo experimental foram coletadas amostras de solo até 20 cm, seguindo de extração de SH para análises espectroscópicas. No campo experimental americano, observou-se maior teor de C nos sistemas de plantio direto, sobretudo nos sistemas orgânicos, em comparação ao sistema convencional (cerca de 24% de aumento). Os dados obtidos através da espectroscopia de MIR mostraram maiores graus de condensação e hidrofobicidade, influindo em maior humificação e resistência à atividade microbiana para as amostras nos sistemas orgânicos. Os resultados de PY-GC/MS foram analisados por testes não paramétricos de Kruskal-Wallis e Mann-Whitney, sendo observada a maior incidência de estruturas moleculares de caráter fenólico aromático em amostras de MOPo para os sistemas orgânicos considerados, e a maior ocorrência de núcleos condensados, oriundos de lignina e outras fontes, ligados a cadeias alifáticas em amostras de MOPl para os mesmos sistemas, em relação aos demais analisados em estudo. Os resultados obtidos para o campo experimental americano ilustrou maior impacto do manejo orgânico do solo, frente aos demais considerados, no que concerne ao potencial acumulo de carbono e incidência de estruturas mais condensadas e de maior recalcitrância. Os dados do segundo campo experimental, em áreas de reflorestamento de eucalipto no estado de São Paulo, demonstraram comportamentos distintos com maior teor de C e menor grau de humificação (cerca de 25 e 30%, respectivamente) para áreas submetidas à adição de biossólido para a fazenda Areona (AN), sendo observado perfil inverso para a fazenda Entre Rios (ER) (decréscimo de cerca de 20% para C e aumento de, aproximadamente, 100% no grau de humificação). Através dos dados obtidos… Advisors/Committee Members: Martin Neto, Ladislau.

Subjects/Keywords: humic substances; matéria orgânica particulada; particulate organic matter; sistemas de manejo; soil tillage systems; substâncias húmicas

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APA (6^th Edition):

Martins, B. H. (2013). Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24022014-111711/ ;

Chicago Manual of Style (16^th Edition):

Martins, Bruno Henrique. “Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo.” 2013. Doctoral Dissertation, University of São Paulo. Accessed January 17, 2021. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24022014-111711/ ;.

MLA Handbook (7^th Edition):

Martins, Bruno Henrique. “Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo.” 2013. Web. 17 Jan 2021.

Vancouver:

Martins BH. Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo. [Internet] [Doctoral dissertation]. University of São Paulo; 2013. [cited 2021 Jan 17]. Available from: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24022014-111711/ ;.

Council of Science Editors:

Martins BH. Aspectos químicos e potencial de sequestro de carbono em áreas sob diferentes manejos de solo. [Doctoral Dissertation]. University of São Paulo; 2013. Available from: http://www.teses.usp.br/teses/disponiveis/75/75135/tde-24022014-111711/ ;

Virginia Commonwealth University

29. Schlegel, Anne. Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River.

Degree: MS, Biology, 2011, Virginia Commonwealth University

URL: https://doi.org/10.25772/W8M9-1J79 ; https://scholarscompass.vcu.edu/etd/2591

► Investigating linkages between the compositions of suspended (seston) and benthic particulate matter is important to the understanding of organic matter (OM) cycling and nutrient retention… (more)

Subjects/Keywords: Suspended sediments; Settling rate; Sinking; Benthic sediments; Particulate organic matter; James River; Estuaries; Biology; Life Sciences

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APA (6^th Edition):

Schlegel, A. (2011). Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River. (Thesis). Virginia Commonwealth University. Retrieved from https://doi.org/10.25772/W8M9-1J79 ; https://scholarscompass.vcu.edu/etd/2591

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

Chicago Manual of Style (16^th Edition):

Schlegel, Anne. “Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River.” 2011. Thesis, Virginia Commonwealth University. Accessed January 17, 2021. https://doi.org/10.25772/W8M9-1J79 ; https://scholarscompass.vcu.edu/etd/2591.

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

MLA Handbook (7^th Edition):

Schlegel, Anne. “Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River.” 2011. Web. 17 Jan 2021.

Vancouver:

Schlegel A. Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River. [Internet] [Thesis]. Virginia Commonwealth University; 2011. [cited 2021 Jan 17]. Available from: https://doi.org/10.25772/W8M9-1J79 ; https://scholarscompass.vcu.edu/etd/2591.

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

Council of Science Editors:

Schlegel A. Composition of Suspended and Benthic Particulate Matter in the Tidal Freshwater James River. [Thesis]. Virginia Commonwealth University; 2011. Available from: https://doi.org/10.25772/W8M9-1J79 ; https://scholarscompass.vcu.edu/etd/2591

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

Université de Lorraine

30. Le Meur, Mathieu. Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants.

Degree: Docteur es, Géosciences, 2016, Université de Lorraine

URL: http://www.theses.fr/2016LORR0161

►

Les matières en suspension (MES) sont constituées de colloïdes et particules et sont couramment décrites comme des agrégats hétérogènes formées de phases minérales, organiques et… (more)

▼

Les matières en suspension (MES) sont constituées de colloïdes et particules et sont couramment décrites comme des agrégats hétérogènes formées de phases minérales, organiques et biologiques et possédant une forte réactivité de surface. Cette étude vise à étudier l’évolution de composition spatiale et temporelle des MES de la rivière Moselle (Lorraine, France) et également d’étudier la réactivité des MES vis-à-vis de contaminants métalliques. Les MES ont été collectées à différentes stations le long de la rivière Moselle et selon différents régimes hydriques. Des études microscopiques et macroscopiques ont été réalisées dans le but de caractériser les MES. Les résultats ont montré que la composition minérale des MES était relativement constante (1) le long de la Moselle (2) durant différents régimes hydriques et que la géologie du bassin versant contribuait grandement à la composition des MES. Les affluents de la Fensch et de l’Orne, deux rivières impactées par l’héritage industriel ont cependant montré la présence de particules d’origine anthropique. Cette étude a également montré le rôle majeur des MES dans le transport des TMEs et REEs quel que soit le débit. La caractérisation organique des MES a également montré des variations atténuées révélant l’aspect intégrateur d’un bassin versant de cette taille. Des variations saisonnières ont tout de même été observées avec une production autochtone plus élevée durant l’été. L’augmentation du débit a engendré une diminution de la teneur en matière organique ainsi que la présence d’une matière organique plus dégradée. Hormis les stations sur la Fensch et l’Orne, les propriétés de surface des MES sont homogènes, en relation avec la composition des particules. Les études ont également montré que le zinc s’associait de manière différente selon la quantité de zinc en solution. Enfin, l’étude comparée du mode d’association du zinc sur les composés modèles et les MES naturelles a montré la contribution des phyllosilicates dans le transport du zinc

Suspended Particulate Matter (SPM) in rivers, are constituted of colloidal and particulate matter, and described as heterogeneous aggregates of mineral, organic and biological phases which display high and reactive surface area. This study aimed to investigate the spatial and temporal composition evolution (Mineral and organic) of SPM along the Moselle River (Lorraine, France). SPM were collected at different stations along the river and at different regime flow. Macroscopic and microscopic studies were performed in order to characterize natural SPM. The second objective was to investigate the reactivity of SPM toward metallic contaminants. The results showed that the grain size distribution, elemental composition and mineralogy of SPM along the Moselle River and during different regime flow showed only slight variations, except for the Fensch and Orne tributaries, two rivers that were impacted by inherited steel making industrialization and different land use. The results also revealed that the catchment geology greatly…

Advisors/Committee Members: Villiéras, Frédéric (thesis director), Montargès-Pelletier, Emmanuelle (thesis director).

Subjects/Keywords: Matières en suspension; Moselle; Caractérisation organique; Caractérisation minérale; Réactivité; Suspended Particulate Matter; Moselle River; Organic characterization; Mineral characterization; Reactivity; 551.353; 628.168

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APA (6^th Edition):

Le Meur, M. (2016). Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2016LORR0161

Chicago Manual of Style (16^th Edition):

Le Meur, Mathieu. “Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants.” 2016. Doctoral Dissertation, Université de Lorraine. Accessed January 17, 2021. http://www.theses.fr/2016LORR0161.

MLA Handbook (7^th Edition):

Le Meur, Mathieu. “Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants.” 2016. Web. 17 Jan 2021.

Vancouver:

Le Meur M. Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants. [Internet] [Doctoral dissertation]. Université de Lorraine; 2016. [cited 2021 Jan 17]. Available from: http://www.theses.fr/2016LORR0161.

Council of Science Editors:

Le Meur M. Matières en suspension de la Moselle (Lorraine, France) : caractérisation minérale et organique et réactivité vis-à-vis des contaminants métalliques : Suspended Particulate Matter from Moselle River (Lorraine, France) : Mineral, organic characterization and reactivity towards contaminants. [Doctoral Dissertation]. Université de Lorraine; 2016. Available from: http://www.theses.fr/2016LORR0161

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Open Access Theses and Dissertations