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University of Arkansas, Fayetteville

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Full-Text Articles in Environmental Public Health

Spatial Targeting Of Irrigation Development And Water Resource Management To Mitigate Vector-Borne Disease, April Frake, Brad Peter, Grivin Chipula, Joseph Messina Jun 2024

Spatial Targeting Of Irrigation Development And Water Resource Management To Mitigate Vector-Borne Disease, April Frake, Brad Peter, Grivin Chipula, Joseph Messina

Geosciences Faculty Publications and Presentations

Scaling irrigated agriculture is a global strategy to mitigate food insecurity concerns. While expanding irrigated agriculture is critical to meeting food production demands, it is important to consider how these land use and land cover changes (LULCC) may alter the water resources of landscapes and impact the spatiotemporal epidemiology of disease. Here, a generalizable method is presented to inform irrigation development decision-making aimed at increasing crop production through irrigation while simultaneously mitigating malaria risk to surrounding communities. Changes to the spatiotemporal patterns of malaria vector (Anopheles gambiae s.s.) suitability, driven by irrigated agricultural expansion, are presented for Malawi's rainy and …


Examining Media Reports Of Pediatric Unintentional Firearm Injury Deaths For Prevention Messaging Concerning Secured Storage Of Firearms: Us, 2021-2022, Bart Hammig, Abigali Bordelon, Corrine Chandler Feb 2024

Examining Media Reports Of Pediatric Unintentional Firearm Injury Deaths For Prevention Messaging Concerning Secured Storage Of Firearms: Us, 2021-2022, Bart Hammig, Abigali Bordelon, Corrine Chandler

Public Policy Faculty & Graduate Student Publications and Presentations

Background

Media outlets that report on firearm injuries and deaths may provide an important role in emphasizing safe storage practices, particularly when unintentional firearm injuries and deaths occur among young children. There has been a scarcity of research on aspects of media reports on injuries, particularly concerning prevention messaging. The objective of the present study was to examine prevention messaging on the safe storage of firearms among media outlets when reporting on unintentional firearm injury deaths among children aged 0–11.

Methods

The Gun Violence Archive collects information from media sources regarding firearm injuries and deaths. We analyzed data from 2021 …


Preemption In State Tobacco Minimum Legal Sales Age Laws In The Us, 2022: A Policy Analysis Of State Statutes And Case Laws, Page D. Dobbs, Ginny Chadwich, Eric Crosbie, Jessica Breslin, Lisa Henriksen May 2023

Preemption In State Tobacco Minimum Legal Sales Age Laws In The Us, 2022: A Policy Analysis Of State Statutes And Case Laws, Page D. Dobbs, Ginny Chadwich, Eric Crosbie, Jessica Breslin, Lisa Henriksen

Health, Human Performance and Recreation Faculty Publications and Presentations

Preemptive statutory language within tobacco minimum legal sales age (MLSA) laws has prohibited localities from enacting stricter laws than state statutes. With the recent uptake of state Tobacco 21 laws in the US, the current landscape of preempted MLSA laws is unknown. This study sought to update the status of preemption in MLSA laws enacted in US states between 2015–2022. A public health attorney reviewed state tobacco MLSA laws (n = 50) and state tobacco control codes, searching for language regarding preemption. When statutes were unclear, case law was reviewed by examining local ordinances that were invalidated by state court …


Environmental Communication: Changing The Attitude-Behavioral Gap In Science Communication Utilizing Strategic Messaging, Carrie Helgeson Nelms Aug 2022

Environmental Communication: Changing The Attitude-Behavioral Gap In Science Communication Utilizing Strategic Messaging, Carrie Helgeson Nelms

Graduate Theses and Dissertations

National Polls in the United States consistently find the public’s beliefs and attitudes about climate change and other environmental issues significantly diverge from those held by the science community. A communication gap between the findings on the causes and effects of environmental issues and the public’s inability to interpret or refuse to accept these findings are possible causes of this divergence. This communication gap constitutes a threat to society because of inaction to environmental problems and points to needed changes in scientific messaging that better informs and motivates behavioral change. The present research employed a strategic message design to affect …


Transmission Risk Of Malaria Via Gas Flares In Africa, Elle Blake May 2022

Transmission Risk Of Malaria Via Gas Flares In Africa, Elle Blake

Health, Human Performance and Recreation Undergraduate Honors Theses

Gas flaring occurs at oil drilling sites around the world. It is a method to get rid of the extra gas, as well as to release pressure in emergency situations. The pollutants that are contributed to the air through routine gas flaring can be extremely harmful. Chemicals such as sulfur dioxide and methane are burned into the air we breathe (Baker Hughes, 2019). Not only does this have a direct impact on our health, but also on greenhouse gas emissions. The effects on greenhouse gas emissions impact diseases such as Malaria by increasing the temperature of our planet. The purpose …


The Effect Of A Health Educational Program On Sleep Related Health Outcomes, Swetha Sirigineedi May 2022

The Effect Of A Health Educational Program On Sleep Related Health Outcomes, Swetha Sirigineedi

Biological Sciences Undergraduate Honors Theses

Sleep quality has effects on both physical and mental health. Because of this, sleep hygiene is an important health goal. Participation in health programs promoting healthy behaviors has helped people reach their health goals and elicited positive behavior change. Because of this, it was of interest to determine if participation in a virtual, multi-media health education program improved health and wellbeing outcomes of Arkansans. The main objective of this study was to determine the effect of a 20-week behavior and health educational program on the ability of participants to achieve their health goals and improve their health behaviors related to …


Monkeypox Virus Hosts And Transmission Routes: A Systematic Review Of A Zoonotic Pathogen, Mary Walker May 2022

Monkeypox Virus Hosts And Transmission Routes: A Systematic Review Of A Zoonotic Pathogen, Mary Walker

Biological Sciences Undergraduate Honors Theses

Monkeypox virus (MPXV) is an etiological agent of Monkeypox with origins believed to be of Central/West Africa. As a member of the orthopoxvirus family and due to its increasing emergence, it has become a pathogen in need of research. This paper works to find common trends of transmission routes and reservoir hosts in previous publications through a systematic review. Articles found on Web of Science containing the search term “Monkeypox” were sorted based on relevance to the review topics of potential reservoir hosts and transmission routes of Monkeypox virus. Through Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), 1,036 …


Root Phenotyping Of Peptide-Treated Glycine Max, Salem Jackson, Fiona Goggin Jan 2022

Root Phenotyping Of Peptide-Treated Glycine Max, Salem Jackson, Fiona Goggin

Inquiry: The University of Arkansas Undergraduate Research Journal

Plant elicitor peptides (Peps) – endogenous chains of amino acids involved in natural plant defense – have been shown to decrease damage from herbivores and pathogens by inducing an immune response, increasing the emission of volatile organic compounds (VOCS), transcripts, and metabolites. Exogenous treatment of soybean seeds with plant elicitor peptide GmPep3 has been shown to induce these broad-spectrum defenses and offers a new method for increasing crop yield. However, the effects of GmPep3 on indicators of soybean health – root characteristics, growth stages, etc. – have not been fully realized. Using the root-phenotyping platform RhizoVision Explorer, several root traits …


Trajectories Of Covid-19 Vaccine Intentions Among Us Adults: The Role Of Race And Ethnicity, Michael D. Niño, Brittany N. Hearne, Tianji Cai Sep 2021

Trajectories Of Covid-19 Vaccine Intentions Among Us Adults: The Role Of Race And Ethnicity, Michael D. Niño, Brittany N. Hearne, Tianji Cai

Sociology and Criminology Faculty Publications and Presentations

Research examining whether intentions to get a COVID-19 vaccine change over time is scarce. Moreover, the deep and pervasive history of medical racism in the U.S. has created a context in which some racial and ethnic groups exhibit greater levels of COVID-19 vaccine hesitancy; yet few researchers have attempted to determine whether these patterns persist with time. The purpose of this study was twofold: (a.) assess the role of time in COVID-19 vaccine intentions from April 2020 to January 2021, and (b.) examine whether race and ethnicity shape COVID-19 vaccine intention trajectories. Data were drawn from 9 waves of the …


Regional Covid-19 Dynamics: Surrogate Synchrony In Case Infection Rates, Samantha Robinson Aug 2021

Regional Covid-19 Dynamics: Surrogate Synchrony In Case Infection Rates, Samantha Robinson

Mathematical Sciences Faculty Publications and Presentations

As many jurisdictions consider in-person learning strategies (including at Institutions of Higher Education, IHE), implementing travel restrictions or quarantines, and/or establishing interstate pacts to reduce COVID-19 spread, this study explores the degree to which COVID-19 case infection rates in a group of neighboring, Southern and Midwestern U.S. states (namely, Arkansas and its contiguous neighbors) are patterned in a non-random way known as synchrony. Utilizing surrogate synchrony (SUSY) to estimate the dyadic coupling between the COVID-19 case infection rate processes in this region from March to December 2020, results indicate that significant synchrony is present between Arkansas and three of its …


Optimization Of Vaccine Supply Chains In Low- And Middle-Income Countries Utilizing Drones, Maximilian Kolter Jul 2021

Optimization Of Vaccine Supply Chains In Low- And Middle-Income Countries Utilizing Drones, Maximilian Kolter

Graduate Theses and Dissertations

Despite tremendous efforts from governments and humanitarian organizations, millions of children in low- and low-middle-income countries (LICs and LMICs) are still excluded from the benefits of immunization. The vaccine distribution in LICs and LMICs is challenging for several reasons, such as limited cold chain capacities, vaccine wastage, uncertain demand, and lack of access to immunization services. A promising avenue to address these issues is the utilization of drones for vaccine delivery. Drones can fly at high speed on direct paths and could enable on-demand deliveries to mitigate limited storage capacities. Further, their independence of road networks could allow them reaching …


Hpv Vaccine Hesitancy, Ellen Fountain May 2021

Hpv Vaccine Hesitancy, Ellen Fountain

Health, Human Performance and Recreation Undergraduate Honors Theses

Human papillomavirus (HPV) is a virus spread through close contact, often sexual contact. Those infected will be at high risk of developing HPV-related cancers later in life. In 2006, the HPV vaccine was approved for use in the United States, but many were, and continue to be, hesitant to vaccinate their children. While other factors come into play, many times there are misconceptions contributing to hesitancy and ultimate refusal of the vaccine. The goal of this analysis is to review these factors and misconceptions and explore education-based interventions designed to minimize HPV vaccine hesitancy.


The Efficacy Of A Communication Guide On Stress Experienced By Family Members Of Patients Admitted In The Intensive Care Unit With Covid-19, Kandace Williams Apr 2021

The Efficacy Of A Communication Guide On Stress Experienced By Family Members Of Patients Admitted In The Intensive Care Unit With Covid-19, Kandace Williams

The Eleanor Mann School of Nursing DNP Capstone Projects

Coronavirus disease (COVID-19), first introduced in the United States on January 20, 2020, has created worldwide panic due insufficient research and understanding of the nature of this new disease. Patients suffering from COVID-19 often require intensive care unit (ICU) admissions, resulting in stress and confusion amongst patients and their families. The high transmissibility of the disease has caused hospitals to adopt firm visitor restrictions to protect the public from exposure and spread. Families experience increased anxiety and stress due to ineffective communication with staff and restricted access to their hospitalized loved ones. A needs assessment revealed a gap in care …


Improving Sepsis Bundle Compliance In The Emergency Department, Meredith Burkhart Apr 2021

Improving Sepsis Bundle Compliance In The Emergency Department, Meredith Burkhart

The Eleanor Mann School of Nursing DNP Capstone Projects

Sepsis is one of the leading causes of death in hospitals across the nation. It is also the costliest condition a patient can be admitted to the hospital for. This proposal discussed the significance of sepsis in the local, national, and international level. It also covered the SEP-1 guidelines given by the Centers for Medicare and Medicaid. Prior to project implementation, the clinical site had at least one sepsis bundle fall out every month, meaning that a portion of the SEP-1 guideline was not met. This project introduced an alert system for the emergency department to respond to patients with …


The Lost “Doe”: A Quality Improvement Project For Unidentified Patients, Brendi Gale Apr 2021

The Lost “Doe”: A Quality Improvement Project For Unidentified Patients, Brendi Gale

The Eleanor Mann School of Nursing DNP Capstone Projects

A Mass Casualty Incident (MCI) describes any natural or manmade disaster that stresses a community beyond their normal resources (CMS, 2019). Across the globe, populations have grappled with an increased frequency of natural disasters and a surge of critically ill secondary to pandemic SARs-CoV-2 (Cavallo, Donoho, & Forman, 2020; Smith, 2020; US Global Change Research Program, 2018). In addition, the incidence and severity of mass shootings has risen in the United States with a reported 277 active shooter events between the years of 2000-2018 (Federal Bureau of Investigation, 2018; Smith et al., 2019). An Emergency Department (ED) in Northwest Arkansas …


Race And Ethnicity, Gender, And Age On Perceived Threats And Fear Of Covid-19: Evidence From Two National Data Sources, Michael D. Niño, Casey Harris, Grant Drawve, Kevin M. Fitzpatrick Mar 2021

Race And Ethnicity, Gender, And Age On Perceived Threats And Fear Of Covid-19: Evidence From Two National Data Sources, Michael D. Niño, Casey Harris, Grant Drawve, Kevin M. Fitzpatrick

Sociology and Criminology Faculty Publications and Presentations

Previous studies find preventative behaviors designed to reduce the number of infections during emerging disease outbreaks are associated with perceived risk of disease susceptibility. Few studies have attempted to identify underlying factors that explain differences in perceptions of risk during an infectious disease outbreak. Drawing from two early waves of American Trends Panel (n=7,441), as well as a National Science Foundation funded, Qualtrics national panel survey from the early stages of the pandemic (n=10,368), we test whether race and ethnicity, gender, and age were associated with six perceived threat and fear outcomes related to COVID-19. Results …


Conceptualization Of College Students' Covid-19 Related Mask-Wearing Behaviors Using The Multi-Theory Model Of Health Behavior Change, Robert E. Davis, Manoj Sharma, Kayla E. Simon, Amanda H. Wilkerson Jan 2021

Conceptualization Of College Students' Covid-19 Related Mask-Wearing Behaviors Using The Multi-Theory Model Of Health Behavior Change, Robert E. Davis, Manoj Sharma, Kayla E. Simon, Amanda H. Wilkerson

Health, Human Performance and Recreation Faculty Publications and Presentations

Background: Recommendations and policies, regarding the use of face coverings, have been instituted to control transmission of coronavirus disease 2019 (COVID-19). Understanding of psychosocial factors related to the use of face coverings within the context of COVID-19 is needed. This study aimed to conceptualize mask-wearing behavior among students using the Multi-theory Model (MTM) of behavior change.

Methods: In October 2020, students (n = 595) enrolled in a large public southeastern US university were recruited to participate in a cross-sectional survey, using a valid and reliable instrument. Univariate, bivariate, and multivariate techniques described mask-wearing behavior and differentiated theoretical drivers of mask-wearing …


Respiratory Illness And Household Air Pollution: Problem Identification And Intervention, Hannah Flournoy Dec 2020

Respiratory Illness And Household Air Pollution: Problem Identification And Intervention, Hannah Flournoy

The Eleanor Mann School of Nursing Undergraduate Honors Theses

This study is an expanded literature review that identifies the key concepts of Household Air Pollution (HAP) and the relationship it has with respiratory illness. This study identifies twenty research studies that inspect HAP and respiratory symptoms across a number of communities that utilize biomass fuel as their primary fuel source. It seeks to identify the problems that come with HAP, such as childhood respiratory infection, COPD, and other respiratory illnesses. This review seeks to identify if people in low to middle income countries, who utilize biomass fuel sources, see and improved respiratory outcome from using modern cookstoves and other …


Food Safety Risk In An Indoor Microgreen Cultivation System, Gina Marie Misra May 2020

Food Safety Risk In An Indoor Microgreen Cultivation System, Gina Marie Misra

Graduate Theses and Dissertations

Microgreens are immature sprouts of edible plants, sharing some similarities with sprouted seeds and petite leafy greens. Since they are most often grown in containers in buildings or greenhouses, they present a new area for food safety research at the intersection of the built environment and produce farming. Contamination by human pathogens has been extensively studied in other types of produce typically eaten raw, including sprouted seeds, which have been implicated in numerous outbreaks of salmonellosis over the last several decades. There is a paucity of knowledge about the microgreen sector of the fresh-cut industry; thus, it was determined that …


Landscapes Of Danger: A Geospatial Analysis Of Perceived And Realistic Risk In Bryce Canyon National Park, Tia Francis May 2020

Landscapes Of Danger: A Geospatial Analysis Of Perceived And Realistic Risk In Bryce Canyon National Park, Tia Francis

Graduate Theses and Dissertations

The quantification of risk has inspired a wide breath of literature from the physical sciences, social sciences, and interdisciplinary disciplines like geography. Many attempts to estimate risk via natural hazards either focus on quantifying realistic risk or perceived risk of lay persons, with very little overlap between these paradigms. Due to this, a considerable knowledge gap exists within perceived risk and natural hazards research. This study aims to provide a comprehensive, risk estimation and assessment strategy through a multi-hazard risk assessment of Bryce Canyon National Park (BRCA). This case study analyzed knowledge of risk among visitors with perception surveys and …


The Potential Of Pay‑For‑Success As A Financing Strategy For Evidence‑Based Practices: An Illustration With Multisystemic Therapy, Alex R. Dopp, Cameron M. Perrine, Samantha Iovan, Paula M. Lantz Sep 2019

The Potential Of Pay‑For‑Success As A Financing Strategy For Evidence‑Based Practices: An Illustration With Multisystemic Therapy, Alex R. Dopp, Cameron M. Perrine, Samantha Iovan, Paula M. Lantz

Psychological Science Faculty Publications and Presentations

There is a critical need to identify strategies for financing the implementation of evidence-based practices. We illustrate the potential of pay-for-success financing (PFS)—a strategy in which private investors fund implementation and receive a return on investment from a government payer—using multisystemic therapy as an example. We argue that standard multisystemic therapy (for serious juvenile offenders) and several of its adaptations (for other complex behavioral problems in youth) would be good candidates for PFS in the right contexts. Despite some challenges for policymakers and administrators, PFS has significant potential as a financing strategy for evidence-based practices.


Geospatial Analysis Of Rickettsial Species In Arkansas, Amy D. Frank, Ashley P.G. Dowling Jan 2019

Geospatial Analysis Of Rickettsial Species In Arkansas, Amy D. Frank, Ashley P.G. Dowling

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Rickettsia species are obligate intracellular, arthropod-borne bacteria with a potential to cause multiple diseases including Rocky Mountain spotted fever (RMSF). Fleas, mites, and ticks serve as vectors for Rickettsia, but ticks are the primary vector of interest. RMSF and other rickettsial diseases have continued to gain importance in both human and veterinary medicine as RMSF is the most common tick-borne disease within the United States according to the Lyme and Tick-Borne Disease Research Center. A statewide citizen science project was utilized to determine the prevalence of Spotted Fever Group (SFG) Rickettsia in Arkansas. This project yielded results in 64 …


Young Adult E-Cigarette Exposure: Implications For Policy And Prevention, Monica Page Daniel Dobbs Aug 2016

Young Adult E-Cigarette Exposure: Implications For Policy And Prevention, Monica Page Daniel Dobbs

Graduate Theses and Dissertations

Objective. The purpose of this study is to examine factors associated with e-cigarette use among college students to better understand their behavior. Using Ajzen’s Reasoned Action Approach, this study sought to better understanding the influence of attitudes, Social norms, and perceived behavioral controls (PBCs) on college students’ intention to try e-cigarettes (even one puff) in the next 30 days.

Methodology. This study employed three phases for a mixed methods design that took place between December 2015 and April 2016. Phase 1 used Middlestadt’s salient belief elicitation procedure to capture responses through an open ended survey (n=58). Phase 2, a pilot …


Evaluation Of Protein Source At Breakfast On Energy Metabolism, Metabolic Health, And Food Intake: A Pilot Study, Lauren A. Cambias May 2016

Evaluation Of Protein Source At Breakfast On Energy Metabolism, Metabolic Health, And Food Intake: A Pilot Study, Lauren A. Cambias

Human Nutrition and Hospitality Management Undergraduate Honors Theses

Abstract

Over 30% of adults in the US are obese. A primary contributor to obesity is an unhealthy diet related to imbalanced macronutrients. Diets higher in protein (PRO) are associated with increased energy expenditure (EE) and reduced food intake. The objective of this pilot study was to determine if protein source at breakfast influences EE in young men (n=4; ages 18-35). Participants consumed three isocaloric (whey (WP), pea (PP), beef (BP); 275 kcal, 62% PRO, 23% CHO, 15% Fat) drinks in randomized, crossover design with a one-week washout period. Each test day EE, appetite, and cravings were assessed at 0, …


Power To The People? An Evaluation Of State-Level Environmental Justice Policies, Angela Michelle Hines May 2014

Power To The People? An Evaluation Of State-Level Environmental Justice Policies, Angela Michelle Hines

Graduate Theses and Dissertations

Communities of color in America lacking economical, educational, and political power have been largely invisible in the process of making major policy decisions. This is lack of access to decision-making venues has been viewed by many as the reason behind marginalized populations bearing the brunt of many societal burdens. The Environmental Justice Movement legitimized the claims of inadequate access to the decision-making process concerning environmental conditions in which African-Americans lived and worked. Through the use of disruptive actions reminiscent of those used throughout the Civil Rights Movement, the plight of communities plagued by the daily presence of hazardous waste gained …


Dilute-Acid-Extractable Phosphorus, Arsenic, And Selenium In Weathered And Fresh Coal Fly Ash, Chris Wilbanks, Kristofor Brye, David Miller Jan 2014

Dilute-Acid-Extractable Phosphorus, Arsenic, And Selenium In Weathered And Fresh Coal Fly Ash, Chris Wilbanks, Kristofor Brye, David Miller

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Fly ash is a byproduct of the combustion of coal, primarily by coal-fired power plants. Over 97.8 million tonnes of fly ash are produced each year in the United States. Fly ash can contain trace elements in concentrations that can cause health risks. Recent spills have highlighted that fly ash disposal is problematic. The objective of this study was to evaluate the effects of fly-ash type (fresh and weathered) from a local coal-burning power plant and extraction time (2 and 6 h) on dilute-acid extractable concentrations of phosphorus (P), arsenic (As), and selenium (Se). Ash samples were extracted with 0.1 …


Presence Of Antibiotic Resistance Genes From Wastewater Treatment Plant Effluent In Northwest Arkansas, Ryan Macleod, Mary Savin Jan 2014

Presence Of Antibiotic Resistance Genes From Wastewater Treatment Plant Effluent In Northwest Arkansas, Ryan Macleod, Mary Savin

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Antibiotic resistance genes (ARGs) among bacterial populations are causing increasing concern with medical and agricultural implications. While the effluent of wastewater treatment plants (WWTPs) is treated with a variety of antimicrobial methods, bacteria and the genetic material that is able to pass on antibiotic resistance to environmental populations are not completely destroyed. Ampicillin (amp), tetracycline (tet), and sulfonamide (sul) antibiotics have been detected in Northwest Arkansas (NWA) streams, and IncP plasmids—which are especially notorious for containing antibiotic resistance genes and have been detected after disinfection in NWA WWTPs—are known to carry ARGs for those antibiotics. The objective of this inquiry …


The Potential Environmental Benefits Of Hybrid Rice Varieties, Haxhire Myrteza Aug 2012

The Potential Environmental Benefits Of Hybrid Rice Varieties, Haxhire Myrteza

Graduate Theses and Dissertations

With water insufficiency being already a major issue and potential carbon policies on greenhouse gas (GHG) emissions, Arkansas rice producers may need to undergo some changes in regards to rice cultivar selection. The purpose of this study is to estimate the environmental benefits of cultivating hybrid rice varieties as opposed to conventional and Clearfield rice varieties. To accomplish this goal, water use and GHG emissions were estimated on per acre (ac) and per bushel (bu) basis for most commonly cultivated rice varieties in Arkansas. The study focuses particularly on six main rice stations in the State of Arkansas. The hypothesis …


E-85 Vs. Regular Gasoline: Effects On Engine Performance, Fuel Efficiency, And Exhaust Emissions, Jordan W. Steinhaus, Donald M. Johnson, George W. Wardlow Jan 2009

E-85 Vs. Regular Gasoline: Effects On Engine Performance, Fuel Efficiency, And Exhaust Emissions, Jordan W. Steinhaus, Donald M. Johnson, George W. Wardlow

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

This study compared the performance, fuel efficiency, and exhaust emissions of a 2.61 kW engine fueled with regular unleaded gasoline (87 octane) and an 85% ethanol blend (E85) under two load conditions. Four 1-h tests were conducted with each fuel at both governor’s maximum (3400 rpm) and peak torque (2800 rpm) conditions for a total of 16 tests. At governor’s maximum engine speed, there were no significant differences (p>0.05) between fuels for engine torque, power, specific carbon dioxide (sCO2 ), specific carbon monoxide (sCO), specific hydrocarbons (sHC), or specific oxides of nitrogen (sNOX) emissions. However, there was a significant …


Measurement Of Transient Smoke Emissions From Diesel And Biodiesel Fuel Blends In An Agricultural Tractor, Kristin M. Pennington, Sonia R. Munoz, Donald M. Johnson, George Wardlow Jan 2009

Measurement Of Transient Smoke Emissions From Diesel And Biodiesel Fuel Blends In An Agricultural Tractor, Kristin M. Pennington, Sonia R. Munoz, Donald M. Johnson, George Wardlow

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Transient smoke emissions pose potential hazards to human health and the environment. With the increased popularity of biodiesel, there is a need to determine if these fuels produce different levels of particulate matter in exhaust emissions. This study examined the transient smoke emissions of three fuels: No. 2 petroleum diesel fuel (D2, ASTM D 975), a blend of 20% biodiesel and 80% petroleum diesel (B20, ASTM 6751), and a 100% pure biodiesel derived from animal fats (B100, ASTM D 6751). Measurements of smoke emissions were taken using the SAE J1677 snap acceleration test procedure on a John Deere 3203 compact …