|August 2004 ‐ Present||Associate Professor, Iowa State University ‐ Department of Agricultural and Biosystems Engineering|
|August 2000 ‐ August 2004||Assistant Professor, Texas A&M University ‐ Agricultural Research and Extension Center|
|August 1998 ‐ August 2000||Postdoctoral Fellowship, University of Waterloo ‐ Department of Chemistry|
|2017 - Present||Evaluation of current products for use in deep pit swine manure storage structures for mitigation of odors and reduction of NH3, H2S, and VOC emissions from stored swine manure|
|National Pork Board|
|Colleague(s): Dan Andersen, David B. Parker|
|2016 - Present||INFEWS/T4: The INFEWS-ER: a Virtual Resource Center Enabling Graduate Innovations at the Nexus of Food, Energy, and Water Systems.|
|National Science Foundation - 1639340|
|Colleague(s): Luis Rodriguez, Deanne Meyer, Anna-Maria Marshall, Rick Koelsch|
Honors and Awards
- Outstanding Toxicology Faculty Mentor Award, Iowa State University, 2011
- Nomination for the Grand Prize Katerva Award, 2011
- Multistate Research Award for Project S-1032—Improving the sustainability of livestock and poultry production in the United States, 2011
- The Best Paper Award—1st World Conference PETrA (Pollution and Environment—Treatment of Air), 2011
- Alpha Epsilon Agricultural Engineering Society, Honorary Member, 2011
- ISU College of Agriculture and Life Sciences Mid-Career Achievement in Research Award, 2010
|1994 ‐ 1998||PhD, PhD, University of Texas at Austin ‐ Civil and Environmental Engineering|
|August 1991 ‐ December 1993||MS, MS in Environmental Quality Engineering, University of Alaska Anchorage ‐ Civil Engineering|
4350 Elings Hall
605 Bissell Rd
Ames, IA 50011-1098
Peer-Reviewed Articles (41)
Farm-scale testing of soybean peroxidase and calcium peroxide for surficial swine manure treatment and mitigation of odorous VOCs, ammonia and hydrogen sulfide emissions Atmospheric Environment (2017)
The swine industry, regulatory agencies, and the public are interested in farm-tested methods for controlling gaseous emissions from swine barns. In earlier lab- and pilot-scale studies, a renewable catalyst consisting of soybean peroxidase (SBP) mixed ...
Use of fecal volatile organic compound analysis to discriminate between non-vaccinated and BCG—Vaccinated cattle prior to and after Mycobacterium bovis challenge PLoS ONE (2017)
Bovine tuberculosis is a zoonotic disease of global public health concern. Development of diagnostic tools to improve test accuracy and efficiency in domestic livestock and enable surveillance of wildlife reservoirs would improve disease management and ...
Development of an Automated Method for Selected Aromas of Red Wines from Cold-Hardy Grapes Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry-Olfactometry Separations (2017)
The aroma profile of red wine is complex and research focusing on aroma compounds and their links to viticultural and enological practices is needed. Current research is limited to wines made from cold-hardy cultivars (interspecific ...
Mitigation of Livestock Odors Using Black Light and a New Titanium Dioxide-Based Catalyst: Proof-of-Concept Atmosphere (2017)
Concentrated livestock feeding operations have become a source of odorous gas emissions that impact air quality. Comprehensive and practical technologies are needed for a sustainable mitigation of the emissions. In this study, we advance the ...
Efficacy of NH3 as a secondary barrier treatment for inactivation of Salmonella Typhimurium and methicillin-resistant Staphylococcus aureus in digestate of animal carcasses: Proof-of-concept PLoS ONE (2017)
Managing the disposal of infectious animal carcasses from routine and catastrophic disease outbreaks is a global concern. Recent research suggests that burial in lined and aerated trenches provides the rapid pathogen containment provided by burial, ...
Pilot-scale testing of renewable biocatalyst for swine manure treatment and mitigation of odorous VOCs, ammonia and hydrogen sulfide emissions Atmospheric Environment (2017)
Comprehensive control of odors, hydrogen sulfide (H2S), ammonia (NH3), and greenhouse gas (GHG) emissions associated with swine production is a critical need. A pilot-scale experiment was conducted to evaluate surface-applied soybean peroxidase (SBP) and calcium ...
Characterizing the scent and chemical composition of Panthera leo marking fluid using solid-phase microextraction and multidimensional gas chromatography–mass spectrometry-olfactometry Scientific Reports (2017)
Lions (Panthera leo) use chemical signaling to indicate health, reproductive status, and territorial ownership. To date, no study has reported on both scent and composition of marking fluid (MF) from P. leo. The objectives of ...
Evaluation of Tannins and Anthocyanins in Marquette, Frontenac, and St. Croix Cold-Hardy Grape Cultivars Fermentation (2017)
Cold-hardy grape cultivars have become popular in northern regions. Wines from these cultivars are low in tannins and lighter in color compared to Vitis vinifera. The northern regions are striving to enhance desired ″full body″ ...
Passive Sampling and Analysis of Naphthalene in Internal Combustion Engine Exhaust with Retracted SPME Device and GC-MS Atmosphere (2017)
Exhaust gases from internal combustion engines are the main source of urban air pollution. Quantification of Polycyclic aromatic hydrocarbons (PAHs) in the exhaust gases is needed for emissions monitoring, enforcement, development, and testing of control ...
Pilot-Scale Testing of Non-Activated Biochar for Swine Manure Treatment and Mitigation of Ammonia, Hydrogen Sulfide, Odorous Volatile Organic Compounds (VOCs), and Greenhouse Gas Emissions Sustainability (2017)
Managing the environmental impacts associated with livestock production is a challenge for farmers, public and regulatory agencies. Sustainable solutions that take into account technical and socioeconomic factors are needed. For example, the comprehensive control of ...
Successful grant-writing strategies for junior scientists: An American public university perspective Puls Uczelni (2016)
The objective of this article was to summarize selected successful grant writing strategies from the perspective of an American public university faculty member. Early sections focused on describing the American public university system aspects that ...
Summary of performance data for technologies to control gaseous, odor, and particulate emissions from livestock operations: Air management practices assessment tool (AMPAT) Data in Brief (2016)
The livestock and poultry production industry, regulatory agencies, and researchers lack a current, science-based guide and data base for evaluation of air quality mitigation technologies. Data collected from science-based review of mitigation technologies using practical, ...
Analysis of Odorants in Marking Fluid of Siberian Tiger (Panthera tigris altaica) Using Simultaneous Sensory and Chemical Analysis with Headspace Solid-Phase Microextraction and Multidimensional Gas Chromatography-Mass Spectrometry-Olfactometry Molecules (2016)
Scent-marking is the most effective method of communication in the presence or absence of a signaler. These complex mixtures result in a multifaceted interaction triggered by the sense of smell. The objective was to identify ...
Surface Application of Soybean Peroxidase and Calcium Peroxide for Reducing Odorous VOC Emissions from Swine Manure Slurry Applied Engineering in Agriculture (2016)
A laboratory experiment was conducted to evaluate and compare surface-applied versus fully-mixed treatments of soybean peroxidase (SBP) plus calcium peroxide (CaO2) for reducing odorous volatile organic compound (VOC) emissions from swine manure slurry. Industrial-grade SBP ...
Urease Inhibitor for Reducing Ammonia Emissions from an Open-Lot Beef Cattle Feedyard in the Texas High Plains Applied Engineering in Agriculture (2016)
Reducing ammonia (NH3) emissions from animal feeding operations is important from the perspective of environmental policy and its impact on agriculture. In laboratory studies, urease inhibitors have been effective in reducing NH3 emissions from beef ...
Characterizing the Smell of Marijuana by Odor Impact of Volatile Compounds: An Application of Simultaneous Chemical and Sensory Analysis PLoS One (2015)
Recent US legislation permitting recreational use of marijuana in certain states brings the use of marijuana odor as probable cause for search and seizure to the forefront of forensic science, once again. This study showed ...
Odor impact of volatiles emitted from marijuana, cocaine, heroin and their surrogate scents Data in Brief (2015)
Volatile compounds emitted into headspace from illicit street drugs have been identified, but until now odor impact of these compounds have not been reported. Data in support of identification of these compounds and their odor ...
Studying Plant–Insect Interactions with Solid Phase Microextraction: Screening for Airborne Volatile Emissions Response of Soybeans to the Soybean Aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) Chromatography (2015)
Insects trigger plants to release volatile compounds that mediate the interaction with both pest and beneficial insects. Soybean aphids (Aphis glycines) induces soybean (Glycine max) leaves to produce volatiles that attract predators of the aphid. ...
Odor and Odorous Chemical Emissions from Animal Buildings: Part 3. Chemical Emissions Transactions of the ASABE (2015)
The objective of this study was to measure the long-term odor emissions and corresponding concentrations and emissions of 20 odorous volatile organic compounds (VOCs). This study was an add-on study to the National Air Emission ...
Odor and Odorous Chemical Emissions from Animal Buildings: Part 5. Simultaneous Chemical and Sensory Analysis with Gas Chromatography-Mass Spectrometry-Olfactometry Transactions of the ASABE (2015)
Simultaneous chemical and sensory analyses using gas chromatography-mass spectrometry-olfactometry (GC-MS-O) for air samples collected at barn exhaust fans were used for quantification and ranking of the odor impacts of target odorous gases. Fifteen target odorous ...
Quantification of Carbonyl Compounds Generated from Ozone-Based Food Colorants Decomposition Using On-Fiber Derivatization-SPME-GC-MS Chromatography (2015)
Fruit leathers (FLs) production produces some not-to-specification material, which contains valuable ingredients like fruit pulp, sugars and acidulates. Recovery of FL for product recycling requires decolorization. In earlier research, we proved the efficiency of an ...
Reducing Bacterial Contamination in Fuel Ethanol Fermentations by Ozone Treatment of Uncooked Corn Mash Journal of Agricultural and Food Chemistry (2015)
Ozonation of uncooked corn mash from the POET BPX process was investigated as a potential disinfection method for reducing bacterial contamination prior to ethanol fermentation. Corn mash (200 g) was prepared from POET ground corn ...
Определение фенола в почвах с использованием твердофазной микроэкстракции, газовой хромато-масс-спектрометрии и метода добавок Chemical Bulletin of Kazakh National University (2015)
Фенол является веществом второго класса опасности, обладает канцерогенными и мутагенными свойствами. Определение фенола в почвах стандартными методами требует длительную и трудоемкую пробоподготовку. Метод твердофазной микроэкстракции (ТФМЭ) позволяет существенно упростить определение загрязнителей почв, однако его применение ...
Analytical Methods for Chemical and Sensory Characterization of Scent-Markings in Large Wild Mammals: A Review Sensors (2014)
In conjoining the disciplines of “ethology” and “chemistry” the field of “Ethochemistry” has been instituted. Ethochemistry is an effective tool in conservation efforts of endangered species and the understanding of behavioral patterns across all species. ...
Ozonation-Based Decolorization of Food Dyes for Recovery of Fruit Leather Wastes Journal of Agricultural and Food Chemistry (2013)
Commercial manufacture of fruit leathers (FL) usually results in a portion of the product that is out of specification. The disposition of this material poses special challenges in the food industry. Because the material remains ...