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Rural School Wastewater Treatment System, Parker J. Dulin, Payton M. Smith, James W. Swart 2016 University of Tennessee, Knoxville

Rural School Wastewater Treatment System, Parker J. Dulin, Payton M. Smith, James W. Swart

University of Tennessee Honors Thesis Projects

No abstract provided.


Carbon Nanotubes Affect The Toxicity Of Cuo Nanoparticles To Denitrification In Marine Sediments By Altering Cellular Internalization Of Nanoparticle, Xiong Zheng, Yinglong Su, Yinguang Chen, Rui Wan, Mu Li, Haining Huang, Xu Li 2016 Tongji University, Shanghai, China

Carbon Nanotubes Affect The Toxicity Of Cuo Nanoparticles To Denitrification In Marine Sediments By Altering Cellular Internalization Of Nanoparticle, Xiong Zheng, Yinglong Su, Yinguang Chen, Rui Wan, Mu Li, Haining Huang, Xu Li

Civil Engineering Faculty Publications

Denitrification is an important pathway for nitrate transformation in marine sediments, and this process has been observed to be negatively affected by engineered nanomaterials. However, previous studies only focused on the potential effect of a certain type of nanomaterial on microbial denitrification. Here we show that the toxicity of CuO nanoparticles (NPs) to denitrification in marine sediments is highly affected by the presence of carbon nanotubes (CNTs). It was found that the removal efficiency of total NOX-N (NO3-N and NO2-N) in the presence of CuO NPs was only 62.3%, but it increased to ...


Evaluating Soil Tillage Practices Using X-Ray Computed Tomography And Conventional Laboratory Methods, Maria Ambert-Sanchez, Steven K. Mickelson, Syed I. Ahmed, Joseph N. Gray, David F. Webber 2016 Peace Corps

Evaluating Soil Tillage Practices Using X-Ray Computed Tomography And Conventional Laboratory Methods, Maria Ambert-Sanchez, Steven K. Mickelson, Syed I. Ahmed, Joseph N. Gray, David F. Webber

Steven K. Mickelson

Using x-ray computed tomography (CT) for non-destructive 3-D imaging and analysis of soil physical properties has been investigated for over 30 years. However, applying this system in soil science has remained a specialized research area using primarily low-resolution medical-grade x-ray CT units that were not designed for soil analysis applications. The main research objectives were to characterize and compare physical properties of soil core samples from long-term chisel plow (CP) and no-till (NT) agricultural field management sites using a high-resolution industrial-grade x-ray CT unit and two conventional soil laboratory method (SLM) soil macroporosity analysis procedures. Field research activities during 1999 ...


Successful Strategies For Engaging Community Colleges And Universities In Transfer Partnership, Marcia R. Laugerman, Diane T. Rover, Steven K. Mickelson, Mack C. Shelley, Kari Hensen 2016 University of Iowa

Successful Strategies For Engaging Community Colleges And Universities In Transfer Partnership, Marcia R. Laugerman, Diane T. Rover, Steven K. Mickelson, Mack C. Shelley, Kari Hensen

Steven K. Mickelson

In order to increase the number of students (U.S. citizens or permanent residents) receiving associate or baccalaureate degrees in established or emerging fields within science, technology, engineering, and mathematics (STEM), the National Science Foundation (NSF) established the Science, Technology, Engineering, and Mathematics Talent Expansion Program (STEP).

The Student Enrollment and Engagement through Connections (SEEC) project is a collaboration between Iowa State University (ISU) and Des Moines Area Community College (DMACC) funded by a STEP grant to increase the number of students graduating with a bachelor's degree in engineering at ISU and the number of students in pre-engineering study ...


Holistic Student Professional Development And Assessment: A Backward Design Approach, Jacqulyn A. Baughman, Thomas J. Brumm, Steven K. Mickelson 2016 Iowa State University

Holistic Student Professional Development And Assessment: A Backward Design Approach, Jacqulyn A. Baughman, Thomas J. Brumm, Steven K. Mickelson

Steven K. Mickelson

No abstract provided.


Buffer Strips For Controlling Herbicide Losses, Steven K. Mickelson, James L. Baker 2016 Iowa State University

Buffer Strips For Controlling Herbicide Losses, Steven K. Mickelson, James L. Baker

Steven K. Mickelson

Buffer strips are considered effective for reducing runoff of sediment and agricultural chemicals from cropland. In fact, buffer strips, or vegetative filter strips, have been suggested as a Best Management Practice to reduce nonpoint source pollution from cropland. This pollution can be great, especially if rainfall occurs shortly after a chemical has been applied.


Impacts Of Cattle Grazing Management On Sediment And Phosphorus Loads In Surface Waters, M. M. Haan, J. R. Russell, Wendy J. Powers, J. L. Kovar, J. L. Boehm, Steven K. Mickelson, R. Schultz 2016 Iowa State University

Impacts Of Cattle Grazing Management On Sediment And Phosphorus Loads In Surface Waters, M. M. Haan, J. R. Russell, Wendy J. Powers, J. L. Kovar, J. L. Boehm, Steven K. Mickelson, R. Schultz

Steven K. Mickelson

In 2001 (yr 1), 2002 (yr 2), and 2003 (yr 3), three blocks of five 1-ac paddocks were grazed by beef cows on hills at the Iowa State University Rhodes Research and Demonstration Farm to determine the effects of grazing management on phosphorus (P) and sediment runoff from pastureland. Grazing management treatments included an ungrazed control (UG), summer hay harvest with winter stockpiled grazing (HS), grazing by continuous stocking to a residual sward height of 2 in. (2C), rotational stocking to a residual sward height of 2 in. (2R), and rotational stocking to a residual sward height of 4 in ...


The Engineering Admissions Partnership Program: A Navigation Strategy For Community College Students Seeking A Pathway Into Engineering, Marcia R. Laugerman, Mack C. Shelley, Steven K. Mickelson, Diane T. Rover 2016 University of Iowa

The Engineering Admissions Partnership Program: A Navigation Strategy For Community College Students Seeking A Pathway Into Engineering, Marcia R. Laugerman, Mack C. Shelley, Steven K. Mickelson, Diane T. Rover

Steven K. Mickelson

This paper presents the evaluation of a program designed to improve transfer outcomes for community college students pursuing an engineering degree. The program, the Engineering Admissions Partnership Program (E-APP), was designed to improve the navigational success of community college transfer students through connections to the university. These connections include coordinated academic advising, peer-mentoring, campus visits, and online social and professional networks. The objective of the study is to determine the efficacy of the E-APP and its interventions, which will be measured by increased participation rates and increased university retention rates for E-APP participants. Outcome data for the students are analyzed ...


Efficient Herbicide Application To Reduce Environmental Losses, James L. Baker, Steven K. Mickelson 2016 Iowa State University

Efficient Herbicide Application To Reduce Environmental Losses, James L. Baker, Steven K. Mickelson

Steven K. Mickelson

Media reports of atrazine in rainwater and surface and groundwater resources have prompted a concerned public, which includes farmers, to find more efficient, environmentally sound ways to apply pesticides and fertilizer.


Livestock Manure Windrow Composting Runoff And Infiltration Characteristics From Laboratory Rainfall Simulations, David F. Webber, Steven K. Mickelson, Bryan D. Whitman, T. L. Richard, Heekwon Ahn 2016 Iowa State University

Livestock Manure Windrow Composting Runoff And Infiltration Characteristics From Laboratory Rainfall Simulations, David F. Webber, Steven K. Mickelson, Bryan D. Whitman, T. L. Richard, Heekwon Ahn

Steven K. Mickelson

Windrow-composted livestock manure has been shown to be less hazardous to the environment compared to manure directly applied to cropland and other agricultural areas. Although offsite contaminant losses through runoff and leaching can occur during the composting process, these losses are suspected to increase under different compost moisture conditions and as composted materials mature. This research quantified the effects of windrow-composted livestock manure and straw bedding components on runoff and infiltration characteristics from laboratory rainfall simulations. Compost samples collected on three dates at approximately the beginning (day 0), middle (day 30), and end (day 60) of a June-July 2004 field ...


Impacts Of Cattle Grazing Management On Sediment And Phosphorus Loads In Surface Waters, Mathew M. Haan, James R. Russell, Wendy Powers, John Kovar, Richard C. Schultz, Steven K. Mickelson 2016 Iowa State University

Impacts Of Cattle Grazing Management On Sediment And Phosphorus Loads In Surface Waters, Mathew M. Haan, James R. Russell, Wendy Powers, John Kovar, Richard C. Schultz, Steven K. Mickelson

Steven K. Mickelson

The amounts of sediment and phosphorus (P) in water runoff from agricultural lands are of concern because of the potential for siltation and eutrophication of surface waters. There is limited information about the total sediment and P loads in runoff from pastureland in the Midwest. Because vegetation limits soil disruption caused by the impact of raindrops and forage roots hold soil particles, pastures grazed using suitable management practices should maintain water infiltration and minimize sediment and P losses in water runoff. Once sediment and P have been dislodged from the landscape, vegetative buffers can be an effective tool for reducing ...


Determining The Most Efficient Type Of Growth Light For An Aquaponics System Using Yellow Lantern Chilies (Capsicum Chinense), Travis McEachern 2016 Bellarmine University

Determining The Most Efficient Type Of Growth Light For An Aquaponics System Using Yellow Lantern Chilies (Capsicum Chinense), Travis Mceachern

Undergraduate Theses

Abstract

Aquaponics, a type of urban agriculture, shows potential to produce large amounts of food with little water and land requirements. Thus, aquaponics could help address the issue of feeding the growing worldwide population. However, multiple challenges, both technical and economical, are associated with aquaponics, making large-scale implementation of these systems difficult – these systems can require tremendous amounts of energy. This study sought to determine the most efficient types grow lights in aquaponics systems by comparing the growth rates of yellow lantern chilies (Capsicum chinense) when grown under four different types of growth lights: light-emitting diode (LED), metal halide, fluorescent ...


Minimizing Ethanol Concentration In Organosolv Pretreatment For The Saccharification Of Loblolly Pine, Nelson B. Heringer 2016 University of Arkansas, Fayetteville

Minimizing Ethanol Concentration In Organosolv Pretreatment For The Saccharification Of Loblolly Pine, Nelson B. Heringer

Biological and Agricultural Engineering Undergraduate Honors Theses

Organic solvent pretreatment, commonly known as organosolv, is a method used to prepare biomass for enzymatic hydrolysis for the production of biofuels. This method common uses ethanol as the organic solvent. However, this creates an economic issue with the product stream, as ethanol becomes a product and input. This project sought to explore how decreasing the use of ethanol in organosolv pretreatment affected the recoverability of sugars after enzymatic hydrolysis. Loblolly pine (Pinus taeda L.) was pretreated at 170 °C for 60 minutes in 1% dilute sulfuric acid and an ethanol concentration varying from 65% to 35%. Compositional analysis was ...


Cfd Model For Ventilation In Broiler Holding Sheds, Christian Heymsfield 2016 University of Arkansas, Fayetteville

Cfd Model For Ventilation In Broiler Holding Sheds, Christian Heymsfield

Biological and Agricultural Engineering Undergraduate Honors Theses

Broiler production in Arkansas was valued at over $3.6 billion in 2013 (University of Arkansas Extension of Agriculture). Consequently, improvement in any phase of the production process can have significant economic impact and animal welfare implications. From the time poultry leave the farm and until they are slaughtered, they can be exposed to harsh environmental conditions, both in winter and in summer. After road transportation, birds are left to wait in holding sheds once they arrive at the processing plant, for periods of approximately 30 minutes to two hours. This project was interested in this holding shed waiting time ...


Municipal Composting And Organic Waste Diversion: The Case Of Fayetteville, Arkansas, Michael E. Hoppe 2016 University of Arkansas, Fayetteville

Municipal Composting And Organic Waste Diversion: The Case Of Fayetteville, Arkansas, Michael E. Hoppe

Biological and Agricultural Engineering Undergraduate Honors Theses

It is estimated that 40% of food is wasted in the United States; representing $165 billion in wasted resources. A vast majority of that wasted food is ultimately placed in landfills where it decomposes and releases harmful greenhouse gases (GHGs). In fact, food waste alone is responsible for 23% of annual methane emissions for the US. This has a huge impact on global climate change due to the potency of methane as a greenhouse gas. Currently only 5% of the food waste produced is recovered across the nation. Source reduction would be the best solution to reducing this food waste ...


A Mobile Canoe-Mounted, Geo-Referenced, 3-D Water Quality Analyzer, Alex Shpik, Alysse Ness, Ryan Vernich 2016 University of Tennessee - Knoxville

A Mobile Canoe-Mounted, Geo-Referenced, 3-D Water Quality Analyzer, Alex Shpik, Alysse Ness, Ryan Vernich

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Water quality analysis is vital to ensure the health of water sources, as well as identifying pollutants and modeling how they affect a river system. Current methods of collecting water samples consist of stationary samplers that measure changes in water quality at only one location over time. We have designed a mobile, canoe-mounted, water quality analyzing system that will enable researchers to efficiently collect a large number of water quality samples with an associated GPS location and depth for each data point. While the canoe travels in parallel swaths bank to bank, the unit will alternately collect samples from 3 ...


Fate And Transport Of Tylosin-Resistant Bacteria And Macrolide Resistance Genes In Artificially Drained Agricultural Fields Receiving Swine Manure, Elizabeth M. Luby, Thomas B. Moorman, Michelle L. Soupir 2016 Iowa State University

Fate And Transport Of Tylosin-Resistant Bacteria And Macrolide Resistance Genes In Artificially Drained Agricultural Fields Receiving Swine Manure, Elizabeth M. Luby, Thomas B. Moorman, Michelle L. Soupir

Agricultural and Biosystems Engineering Publications

Application of manure from swine treated with antibiotics introduces antibiotics and antibiotic resistance genes to soil with the potential for further movement in drainage water, which may contribute to the increase in antibiotic resistance in non-agricultural settings. We compared losses of antibiotic-resistant Enterococcus and macrolide-resistance (erm and msrA) genes in water draining from plots with or without swine manure application under chisel plow and no till conditions. Concentrations of ermB,ermC and ermF were all > 109 copies g− 1 in manure from tylosin-treated swine, and application of this manure resulted in short-term increases in the abundance of these genes ...


Effects Of Tillage And Poultry Manure Application Rates On Salmonella And Fecal Indicator Bacteria Concentrations In Tiles Draining Des Moines Lobe Soils, C. E. Hruby, M. L. Soupir, T. B. Moorman, M. Shelley, R. S. Kanwar 2016 Iowa State University

Effects Of Tillage And Poultry Manure Application Rates On Salmonella And Fecal Indicator Bacteria Concentrations In Tiles Draining Des Moines Lobe Soils, C. E. Hruby, M. L. Soupir, T. B. Moorman, M. Shelley, R. S. Kanwar

Agricultural and Biosystems Engineering Publications

Application of poultry manure (PM) to cropland as fertilizer is a common practice in artificially drained regions of the Upper Midwest United States. Tile-waters have the potential to contribute pathogenic bacteria to downstream waters. This 3-year study (2010–2012) was designed to evaluate the impacts of manure management and tillage practices on bacteria losses to drainage tiles under a wide range of field conditions. PM was applied annually in spring, prior to planting corn, at application rates ranging from 5 to 40 kg/ha to achieve target rates of 112 and 224 kg/ha nitrogen (PM1 and PM2). Control plots ...


Design Of A Mobile Shade And Cooling Structure For Grazing Dairy Herds, William Barbour, Ellen Moore, Jay McMillan 2016 University of Tennessee, Knoxville

Design Of A Mobile Shade And Cooling Structure For Grazing Dairy Herds, William Barbour, Ellen Moore, Jay Mcmillan

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

The U.S. organic dairy industry has experienced significant growth in recent years: over 10% growth annually since 2009 and 14.5% from 2010 to 2011; total market share is approximately 5% in the United States. The USDA places certain requirements on diary products that are certified organic, some of which are aimed at grazing practices. One challenge farmers must overcome to comply is keeping the cows in optimum conditions in a free-range grazing scenario; poor conditions such as excessive heat can decrease milk production and pose an economic burden on the dairy. The proposed system intends to control environmental ...


Science-Informed Arguments In Undergraduates' Opinions About Biofuels, Olivia Straka, Jenny Dauer 2016 University of Nebraska - Lincoln

Science-Informed Arguments In Undergraduates' Opinions About Biofuels, Olivia Straka, Jenny Dauer

UCARE Research Products

Socioscientific issues (SSIs) are complex, multifaceted issues with components of science as well as components of values requiring evaluation of social, political, and ethical concerns (Nichols & Zeidler, 2009). • However, many students do not possess a fundamental understanding of the underlying scientific foundations of SSIs (NRC, 1998), or may evaluate issues based on personal relevance as opposed to contemplation of evidence presented (Sadler et al., 2004). • This study examined how undergraduate students chose to substantiate their opinions on the SSI of using biofuels as a fuel source before and after taking a semester long course, AGRI/NRES 103. • The AGRI/NRES ...


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