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Full-Text Articles in Life Sciences

An Investigation Of Quality Climate And Its Association With Implementation Of Quality Management System, Sai K. Ramaswamy, Gretchen A. Mosher Nov 2014

An Investigation Of Quality Climate And Its Association With Implementation Of Quality Management System, Sai K. Ramaswamy, Gretchen A. Mosher

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Quality management and continuous improvement are paramount for businesses to survive and thrive in today’s competitive landscape (Goetsch & Davis, 2003; Abdullah et al., 2009). One effective approach to operationalize quality processes and continuous improvement goals is a formalized quality management system (Khanna et al., 2010; Mosher et al., 2013). Quality management systems are embodiments of the organization’s policies, procedures, plans, resources, processes and delegation of responsibility and authority designed to achieve customer satisfaction within the boundaries of organizational objectives (Goetsch & Davis, 2003). While these systems are being used extensively across many industries, the ideas are relatively new to the bulk commodity handling and processing industries (Hurburgh & Lawrence, 2003). Although factors such as globalization and legislation have been external drivers for the adoption of quality management systems in these industries, internal benefits have also been noted as a result of these systems (Laux, 2007; Laux & Hurburgh, 2010).


Use Of Risk Mapping Tools To Identify Hazards In Bulk Material Handling, Saxon J. Ryan, Gretchen A. Mosher Nov 2014

Use Of Risk Mapping Tools To Identify Hazards In Bulk Material Handling, Saxon J. Ryan, Gretchen A. Mosher

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The identification, assessment, and mitigation of risk in complex systems are challenging tasks. Risk analysis is often used in complex systems to reduce the probability of negative events occurring in such systems, and to enhance the decisions made under uncertain conditions (Clemons & Simmons, 1998). The conventional risk analysis framework includes three sub-components: assessment of risk, management of risk, and communication of risk (Codex, 2007). Mapping the risk analysis process within a specific system allows for the identification of the most high-stakes hazards, allowing an efficient application of management and mitigation activities (Clemons & Simmons, 1998; Stamatelatos et al., 2002).


Enhancing Team-Based Senior Capstone Projects: Opportunities And Challenges, Gretchen A. Mosher Oct 2014

Enhancing Team-Based Senior Capstone Projects: Opportunities And Challenges, Gretchen A. Mosher

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Generally, capstone courses focus on the integration and application of technical knowledge and skills acquired in previous coursework along with a consideration of multiple realistic constraints. However, capstone courses also require students to focus on a variety of professional skills, including teamwork, unstructured task completion, and project management. Because students are often new at these skills, they may find it difficult to resolve issues as they arise, particularly when working with an actual industrial client.

Capstone courses also pose challenges to faculty. Finding a consistent stream of projects that are at the appropriate level for senior level students can be ...


Quantifying Cognitive Processes In Virtual Learning Simulations, Michael P. Thornton, Gretchen A. Mosher Oct 2014

Quantifying Cognitive Processes In Virtual Learning Simulations, Michael P. Thornton, Gretchen A. Mosher

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Virtual learning simulations have received increasing attention due various proposed educational, instructional, and institutional advantages; with literature focusing largely on perceptions of this technology and empirical comparisons to other instructional methods. Compared to traditional learning environments, virtual learning environments may present methodological advantages in studying learning processes through applying behavioral tracing techniques.

This paper will discuss behavioral indicators of cognitive learning processes used in virtual decision scenarios designed for third year engineering and engineering technology students. Behavioral measures to quantitatively analyze the learning process will be presented. Implications for assessing student learning, instructional strategy selection, and improving higher education quality ...


Understanding Engineering Students' Perceptions And Knowledge About Sustainable Development And Sustainability, Bhavna Sharma, Brian L. Steward, Say K. Ong, Fernando E. Miguez Oct 2014

Understanding Engineering Students' Perceptions And Knowledge About Sustainable Development And Sustainability, Bhavna Sharma, Brian L. Steward, Say K. Ong, Fernando E. Miguez

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The Sustainable Engineering and International Development course was first offered to engineering majors at the Iowa State University (ISU) in 2005. The course is focused on describing, discussing and comparing the key concepts of sustainability, sustainable development and sustainable engineering. In 2005, sustainability was not a major part of the engineering curricula and students had little to no knowledge about these concepts. Nine years later, sustainability has become an integral part of our daily lives. In this study, we wanted to understand student perceptions, knowledge, and understanding of sustainability, sustainable development and its implementation across various engineering systems. The assessment ...


Fractionation Of Distillers Dried Grains With Solubles (Ddgs) By Combination Of Sieving And Aspiration, Ming-Hsun Cheng, Samantha M. Riess, Kurt A. Rosentrater Jul 2014

Fractionation Of Distillers Dried Grains With Solubles (Ddgs) By Combination Of Sieving And Aspiration, Ming-Hsun Cheng, Samantha M. Riess, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The high protein and oil contents of Distiller’s dried grains with solubles (DDGS) can be obtained by separating raw DDGS into different particle sizes fractions. The separation processes included four sieving and aspiration procedures. Sieving was able to produce fractions with different compositions. As the particle size decreased, the protein and oil content of DDGS increased. For aspiration, that separated DDGS into different fractions depending upon different gravity profiles of protein, oil and fiber basically. The terminal velocity of airflow was determined for each sieving fraction. Large and heavy fractions consisted of mainly protein and oil; light fractions were ...


Economic And Environmental Analysis Of Extrusion Processing Of Grains Into Foods And Feeds, Hilary N. Kletscher, Jacob Venner, Xin Jiang, Kurt A. Rosentrater Jul 2014

Economic And Environmental Analysis Of Extrusion Processing Of Grains Into Foods And Feeds, Hilary N. Kletscher, Jacob Venner, Xin Jiang, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

One of the major problems facing our planet with such a rapidly growing population is a need for cheap and healthy food in developing countries. Although there have already been many valiant attempts at helping this crisis, a "cure-all" solution is still not likely. A common nutrient lacking from many people's diets in developing countries is protein. One way in which this problem can be mitigated is through the use of Textured Vegetable Protein (TVP). This product is produced from the grain extrusion process, is lightweight, and carries high-protein content. It is important to analyze if this product can ...


Techno-Economic Analysis (Tea) And Life Cycle Assessment (Lca) Of Maize Storage In Developing Countries, Rashid A. Suleiman, Kurt A. Rosentrater Jul 2014

Techno-Economic Analysis (Tea) And Life Cycle Assessment (Lca) Of Maize Storage In Developing Countries, Rashid A. Suleiman, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Techno-Economic Analysis (TEA) plays an important role in assessing economic performance and potential market acceptance for new technologies. Previous work has shown that the construction and operation of a cellulosic bioethanol plant can be very expensive. One of the largest cost categories is pretreatment processing. The purpose of this study was to conduct a detailed cost analysis to assess low moisture anhydrous ammonia (LMAA) pretreatment process at the commercial-scale, and to estimate the breakeven point in large-scale production. In this study, capital expenses, including annualized purchase and installation fees, and annual operating costs associated with each unit operation were determined ...


Economic And Environmental Analysis Of Farm-Scale Integrated Ethanol And Biodiesel Production Using Locally-Available Biomass, Bailley A. Richardson, Patrick J. Benson, Kurt A. Rosentrater Jul 2014

Economic And Environmental Analysis Of Farm-Scale Integrated Ethanol And Biodiesel Production Using Locally-Available Biomass, Bailley A. Richardson, Patrick J. Benson, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

With increased technology and economic opportunities, demand for energy and fuels in developing countries is growing exponentially to run processes and improve lifestyles, but rural areas may not have access. It is thus important to identify possible sources of energy for developing rural areas, especially those sources which are renewable and locally produced. The objective of this study was to develop a computer model to assess the viability of developing integrated biofuel production systems using biomass materials specific to Mozambique and India. The models considered various system capacities and production scenarios. Estimates of processing costs, along with other economic factors ...


Mortality Rate Of Weaned And Feeder Pigs As Affected By Ground Transportation Conditions, Yang Zhao, Hongwei Xin, Jay D. Harmon, Steven J. Hoff, Thomas J. Baas Jul 2014

Mortality Rate Of Weaned And Feeder Pigs As Affected By Ground Transportation Conditions, Yang Zhao, Hongwei Xin, Jay D. Harmon, Steven J. Hoff, Thomas J. Baas

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Ground transportation of pigs at early ages is typical in modern swine production because the young animals are often produced in one part of the country and finished in another. One challenge associated with this practice is the profit-stripping incidence of mortality and compromised animal welfare due to stress stemming from unfavorable transporting conditions. The objective of this study was to examine possible causative relationships of mortality rate of weaned and feeder pigs to ground transportation conditions. Records of weaned and feeder pig transportation for the period of April 2012 – January 2014 were provided by a U.S. swine ...


Evaluation Of Hermetic Maize Storage For Smallholder Farmers, Denis Bbosa, Thomas J. Brumm, Carl J. Bern, Kurt A. Rosentrater Jul 2014

Evaluation Of Hermetic Maize Storage For Smallholder Farmers, Denis Bbosa, Thomas J. Brumm, Carl J. Bern, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Maize is an important crop for many smallholder farmers in the world. Maize weevils (Sitophilus zeamais) cause a significant loss in quality and quantity during maize storage in tropical regions. Hermetic storage of maize has been shown to be effective in controlling maize weevils in laboratory settings. The objective of this research was to test the effectiveness of hermetic storage containers that could be used by smallholder farmers. Six 208-L (55-gallon) steel barrels were filled with 170 kg (375 lb) of maize with initial weevil populations of 25 live weevils/kg of maize (11 live weevils/lb). The barrels were ...


Narasin As A Manure Additive To Reduce Methane Production From Swine Manure, Daniel S. Andersen, Kelsey B. Regan Jul 2014

Narasin As A Manure Additive To Reduce Methane Production From Swine Manure, Daniel S. Andersen, Kelsey B. Regan

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Animal production systems are an important source of anthropogenic methane emissions. Production of methane results from microbial activity by anaerobic bacteria populations within the stored manure that breaks down organic material and converts it to biogas. Swine manures obtained from three deep pit storages in Central Iowa were dosed with Narasin, an ionophore, to evaluate its inhibitory effects on methane and biogas production. Four Narasin dosing rates were evaluated, these included 0 (Control), 7.5, 15, and 30 mg Narasin/kg of manure. Overall, the results indicated that Narasin had an inhibitory effect on methane and biogas production, with greater ...


Laboratory-Scale Fractionation Of Distillers Dried Grains With Solubles (Ddgs), Congmu Zhang, Kun Xie, Ming-Hsun Cheng, Kurt A. Rosentrater Jul 2014

Laboratory-Scale Fractionation Of Distillers Dried Grains With Solubles (Ddgs), Congmu Zhang, Kun Xie, Ming-Hsun Cheng, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The objective of this project was to separate distillers dried grains with solubles (DDGS) into high protein and high fiber fractions, in order to improve value and utility as a livestock feed. This project used a laboratory-scale cylindrical blower (Iowa blower) and a laboratory-scale gravity table (Whippet V-80 separator, Sutton, Steele & Steele, Inc.). The raw DDGS was sieved into multiple streams using 10 mesh, 20 mesh and 40 mesh screens. The 10-20 mesh fraction and 20-40 mesh fraction were then run on the blower and the separator separately, using the same settings for air velocity in the range of 0 ...


Fractionation Of Distillers Dried Grains With Solubles (Ddgs) Through A Gravity Separator: Life Cycle Assessment And Techno-Economic Analysis, Kun Xie, Kurt A. Rosentrater Jul 2014

Fractionation Of Distillers Dried Grains With Solubles (Ddgs) Through A Gravity Separator: Life Cycle Assessment And Techno-Economic Analysis, Kun Xie, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

DDGS could have higher market price and wider use if it could be separated into higher protein and higher fiber fractions. In our work, DDGS was firstly sieved into three size categories, and one category was further separated into light, midlight, midheavy and heavy fractions using a gravity separator. This process was effective in getting enhanced DDGS with increased protein and oil. In this study, both Life Cycle Assessment (LCA) and Techno-Economic Analysis (TEA) of our approach to DDGS fractionation were conducted. Three scales, including lab scale, pilot scale, and commercial scale of DDGS fractionation were considered and analyzed. All ...


Techno-Economic Analysis (Tea) Of Using A Destoner To Fractionate Distillers Dried Grains With Solubles (Ddgs), Weitao Zhang, Kurt A. Rosentrater Jul 2014

Techno-Economic Analysis (Tea) Of Using A Destoner To Fractionate Distillers Dried Grains With Solubles (Ddgs), Weitao Zhang, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

With the rapid development of the ethanol industry in recent years, various studies have examined distillers dried grains with solubles (DDGS), the main co-product from ethanol production. Previous studies have examined fractionating DDGS using sieves and aspirators. However, information about the cost effectiveness is lacking. The objective of this project was to determine techno-economics of DDGS fractionation using a destoner to separate nutrients. Mathematical models were built for conducting techno-economic analysis (TEA), which allowed for estimations of capital costs, annual operating costs, annual revenues, and net profits. The techno-economics of the base case ethanol plant were examined by adjusting material ...


Dielectric Spectroscopic Sensor For Particle Contaminant Detection In Hydraulic Fluids, Safal Kshetri, Brian L. Steward, Stuart J. Birrell Jul 2014

Dielectric Spectroscopic Sensor For Particle Contaminant Detection In Hydraulic Fluids, Safal Kshetri, Brian L. Steward, Stuart J. Birrell

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Particulate contamination of hydraulic fluids is one of the major causes of mechanical wear of hydraulic components resulting in system inefficiency and failure. Potential failures of hydraulic systems could be avoided through continuously monitoring the condition of the fluid. A practical contaminant sensor was developed to estimate the level of particulate contamination in hydraulic fluids. The sensor was designed to be installed on vehicle and provide in-line measurements of contaminated hydraulic fluid. The sensor used dielectric spectroscopy for measuring contaminants. To investigate the performance of the dielectric sensor two tests were performed with different diameter central rods using iron particles ...


Techno-Economic Analysis (Tea) Of Extruded Aquafeeds, Rashid A. Suleiman, Chenxu Yu, Kurt A. Rosentrater Jul 2014

Techno-Economic Analysis (Tea) Of Extruded Aquafeeds, Rashid A. Suleiman, Chenxu Yu, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The worldwide decline and overexploitation of ocean fisheries stocks had provided incentive for rapid growth of aquaculture. The aquaculture industry has been recognized as the fastest-growing food production system globally, with a 10% increases in production per year, and is one of the most reliable and sustainable growth markets for manufactured feeds. Extrusion technology has been extensively used in the modern aquatic feed manufacturing, due to nutritional, physical properties improvements and cost effectiveness of feeds. Cost related to aquatic feed remains the biggest challenge, especially for small-scale producers. In this study a single screw extruders and three different scenarios (i ...


Techno-Economic Analysis (Tea) Of Low-Moisture Anhydrous Ammonia (Lmaa) Pretreatment Method For Corn Stover, Minliang Yang, Kurt A. Rosentrater Jul 2014

Techno-Economic Analysis (Tea) Of Low-Moisture Anhydrous Ammonia (Lmaa) Pretreatment Method For Corn Stover, Minliang Yang, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Techno-Economic Analysis (TEA) plays an important role in assessing economic performance and potential market acceptance for new technologies. Previous work has shown that the construction and operation of a cellulosic bioethanol plant can be very expensive. One of the largest cost categories is pretreatment processing. The purpose of this study was to conduct a detailed cost analysis to assess low moisture anhydrous ammonia (LMAA) pretreatment process at the commercial-scale, and to estimate the breakeven point in large-scale production. In this study, capital expenses, including annualized purchase and installation fees, and annual operating costs associated with each unit operation were determined ...


Life Cycle Assessment (Lca) And Techno Economic Analysis (Tea) Of Algal Biomass And Biodiesel Production From Pyrolytic Substrate, Xuefei Zhao, Zhiyou Wen, Kurt A. Rosentrater Jul 2014

Life Cycle Assessment (Lca) And Techno Economic Analysis (Tea) Of Algal Biomass And Biodiesel Production From Pyrolytic Substrate, Xuefei Zhao, Zhiyou Wen, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Hybrid processing of cellulosic biomass, composed of thermochemical-based pyrolysis of biomass into fermentative substrates followed by biochemical-based algal fermentation into lipid-rich biomass was developed. The hybrid process has proven an effective way for producing biofuel from lignocellulosic biomass. In this work, life cycle assessment and techno economic analysis were performed for algal fermentation of the acetic-acid rich stage fraction of bio-oil under different scales and fermentation conditions. These results will provide guidance for choosing optimal algal fermentation parameters. Moreover, with more biodiesel produced, increased environmental and economic benefits per gallon of biodiesel can be expected.


Is Flint Corn Naturally Resistant To Maize Weevil Infestation?, Rashid A. Suleiman, Dennis Williams, Aaron Nissen, Carl J. Bern, Kurt A. Rosentrater Jul 2014

Is Flint Corn Naturally Resistant To Maize Weevil Infestation?, Rashid A. Suleiman, Dennis Williams, Aaron Nissen, Carl J. Bern, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Sitophilus zeamais (maize weevil) is one of the most destructive pests of maize stored in tropical and subtropical regions. This study determined the resistance of flint corn and dent corn to infestation by S. zeamais (Motschulsky), the maize weevil. Improved King Philip hybrid flint corn and Fontanelle 6T-510 hybrid dent corn were used in this experiment. Two temperature conditions (10 °C and 27 °C) and two storage times (15 days and 30 days) were used. Results showed that flint corn was more resistant to insect damage than dent corn at 27 °C and 30 day storage time. After 30 days ...


Energy Use For Field Operations, Crop Drying, And Swine Housing On University Farms, H. Mark Hanna, Jay D. Harmon, Dana D. Schweitzer Jul 2014

Energy Use For Field Operations, Crop Drying, And Swine Housing On University Farms, H. Mark Hanna, Jay D. Harmon, Dana D. Schweitzer

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Energy is an input cost to agricultural production. Knowing typical values can help farmers evaluate management options. Diesel, propane, and electrical energy used on the farm during selected field operations, crop drying, and in swine housing were measured on Iowa State University farms. Baseline values were measured and for tractor operation management styles were compared.

Fuel use was reduced in five of six comparisons (18 to 34%) when operating the tractor in a higher gear and at reduced engine speed while maintaining travel speed. Fuel use also reduced with disking depth, but varied with travel speed during chisel plowing. Energy ...


Optimization Of Low-Moisture Anhydrous Ammonia (Lmaa) Pretreatment Of Corn Stover, Minliang Yang, Kurt A. Rosentrater Jul 2014

Optimization Of Low-Moisture Anhydrous Ammonia (Lmaa) Pretreatment Of Corn Stover, Minliang Yang, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

With many environmental benefits, corn-based ethanol has been widely used in recent years. Cellulosic ethanol, however, will require pretreatment to break down lingo-cellulosic structures prior to fermentation. Among all the pretreatment reagents which can be used, ammonia has been shown to be one of the most effective, because it can readily delignify, swell, and preserve the cellulose. Previous work evaluated the effectiveness of the LMAA pretreatment method. The purpose of this study was to determine optimal conditions (i.e. highest glucose yield) using the LMAA pretreatment process. In this experiment, corn stover was prepared with different moisture contents (20%, 50 ...


Techno-Economic Analysis Of Future Precision Field Robots, Olga M. Toledo, Brian L. Steward, Jingyao Gai, Lie Tang Jul 2014

Techno-Economic Analysis Of Future Precision Field Robots, Olga M. Toledo, Brian L. Steward, Jingyao Gai, Lie Tang

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Precision agriculture (PA) technology provides a means to increase equipment productivity and field efficiency, and input efficiency; however, the potential of PA technologies to enable smaller, autonomous machines has yet not been realized in the market place. In developed countries, the size of tractors and implements continue to increase. Such trend cannot continue indefinitely because of size, technical and cost constraints. A long operating life for agricultural equipment enables a greater benefit relative to the high initial cost and investment. However, long equipment life can lead to technologically obsolete machines with potential incompatibility and sub-optimality, since machinery and PA technology ...


Economic And Environmental Analysis Of Farm-Scale Biodigesters To Produce Energy For Kitchen Stove Use, Zachary P. Bartlett, Alexandra Olivares, Yang Lu, Kurt A. Rosentrater Jul 2014

Economic And Environmental Analysis Of Farm-Scale Biodigesters To Produce Energy For Kitchen Stove Use, Zachary P. Bartlett, Alexandra Olivares, Yang Lu, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Developing countries throughout the world currently fuel kitchen stoves for cooking by burning wood which is responsible for many health and environmental problems. Producing fuel for cooking via anaerobic digestion is a very ecofriendly and resourceful solution that is being explored. To determine the sustainability of anaerobic digestion throughout these regions, multiple biodigester designs were tested under conditions specific to various third-world countries; the countries tested were Nicaragua, Bolivia, Nigeria, India and Indonesia. Factors to be considered included the use of local biomass resources and building materials. Determining the fueling efficiency of anaerobic digestion in comparison to burning wood consisted ...


Determination Of Minimum Horizontal Distance Between Laying-Hen Perches, Kai Liu, Hongwei Xin, Timothy A. Shepherd, Yang Zhao Jul 2014

Determination Of Minimum Horizontal Distance Between Laying-Hen Perches, Kai Liu, Hongwei Xin, Timothy A. Shepherd, Yang Zhao

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The objective of the study was to determine minimum horizontal distance (HD) between perches for laying hens using qualitative and quantitative behavioral analysis. A real-time monitoring system was developed to record hen’s perching behaviors, such as the number of perching hens, perching duration, perching trips, and the pattern of perch occupancy. Three groups of sixteen W-36 laying hens (68 weeks old at test onset) with prior perching experience were used. For each group, hens were kept in an enriched wire-mesh floor pen (1.2×1.2×1.2m) equipped with two parallel perches (15 cm perch space/hen). The ...


Fractionation Of Distillers Dried Grains With Solubles (Ddgs) Through A Gravity Separator: Process Optimization, Kun Xie, Congmu Zhang, Kurt A. Rosentrater Jul 2014

Fractionation Of Distillers Dried Grains With Solubles (Ddgs) Through A Gravity Separator: Process Optimization, Kun Xie, Congmu Zhang, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Distillers Dried Grains with Solubles (DDGS) mainly contains protein, oil, fiber, and ash. DDGS could have more economic value and wider use if it could be separated into higher protein fraction and higher fiber fraction. Various ways have been explored in recent years, and two of the most effective processes are sieving and winnowing. In the present work, the optimization of three parameters of a gravity separator (side slope, eccentric shaft vibration, and the air flow rate), was conducted to separate DDGS. DDGS was firstly sieved into five size categories, then three categories and raw DDGS were further separated into ...


Extrusion Processing Of Amaranth And Quinoa, Caitlin M. Gearhart, Kurt A. Rosentrater Jul 2014

Extrusion Processing Of Amaranth And Quinoa, Caitlin M. Gearhart, Kurt A. Rosentrater

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Because of the growing epidemic of gluten intolerance, there is growing interest in gluten-free foods. Beyond just being gluten-free, such foods can have other positive nutritional benefits to human health. Extrusion processing is commonly used to produce a wide variety of human food products. Gluten-free grains can be a processing challenge, however, due to lack of proper binding, which can lead to poor quality food products. This research explores how extrusion parameters impacted the quality of amaranth- and quinoa-based extrudates. The specific objectives of this project included extruding each of the grains, then measuring extrudate properties, such as color, unit ...


Designing A Low Cost Biogas Pressurizing System In Nicaragua, Linda R. Geiger, Kelsey B. Regan Jul 2014

Designing A Low Cost Biogas Pressurizing System In Nicaragua, Linda R. Geiger, Kelsey B. Regan

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Plug flow biodigesters are popular in developing countries due to their low cost and ability to adapt to microclimates to produce biogas for cooking. These biodigesters are primarily composed of a polyethylene bag and PVC, and, typically, cattle or hog manure is used as both the organic and microbe source for gas production. The biogas is piped to a gas stove to be used for cooking. The digesters are intended to replace traditional wood burning stoves prevalent in developing countries, which are attributed to over two million deaths per year. However, due to pressure limitations due to the plastic bag ...


Concentrations Of Ammonia, Greenhouse Gases And Particulate Matters In Conventional Cage, Aviary, And Enriched Colony Laying-Hen Houses, Yang Zhao, Hongwei Xin, Timothy A. Shepherd, Hong Li Jun 2014

Concentrations Of Ammonia, Greenhouse Gases And Particulate Matters In Conventional Cage, Aviary, And Enriched Colony Laying-Hen Houses, Yang Zhao, Hongwei Xin, Timothy A. Shepherd, Hong Li

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

No abstract provided.


A Case For A Reform In Teaching Introductory, Fundamental Engineering Mechanics Courses, Peggy C. Boylan-Ashraf, Steven A. Freeman, Mack C. Shelley Jun 2014

A Case For A Reform In Teaching Introductory, Fundamental Engineering Mechanics Courses, Peggy C. Boylan-Ashraf, Steven A. Freeman, Mack C. Shelley

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Introductory, fundamental engineering mechanics (IFEM) courses, such as statics of engineering, mechanics of materials, dynamics, and mechanics of fluids, have far too long been focused on intense mathematical and theoretical concepts. Bold new methodologies that connect science to life using active learning pedagogies need to be emphasized more in engineering classrooms. This study investigated the role of a new paradigm in teaching IFEM courses and attempts to contribute to the current national conversation in engineering curriculum development of the need to change engineering education—from passive learning to active learning. Demographic characteristics in this study included a total of 4 ...