Digital Commons Network^™

Insects For Sustainable Animal Feed: Inclusive Business Models Involving Smallholder Farmers, Shaphan Y. Chia, Chrysantus M. Tanga, Joop Ja Van Loon, Marcel Dicke

All Peer-Reviewed Publications

Global population growth, an increasing demand for animal products and scarcity of conventional feed ingredients drive the search for alternative protein sources for animal feed. Extensive research indicates that insects provide good opportunities as a sustainable, high quality and low-cost component of animal feed. Here, we discuss how insect farming can promote inclusive business for smallholder farmers in the agribusiness value chain. Inclusive business models involving insects as ingredients in feed may contribute to solving socio-economic and environmental problems in developing countries, aligning with the United Nations’ Sustainable Development Goals. With low initial capital investments, smallholder insect farmers have good …

Towards A Global Dna Barcode Reference Library For Quarantine Identifications Of Lepidopteran Stemborers, With An Emphasis On Sugarcane Pests, Timothy R.C. Lee, Stacey J. Anderson, Lucy T.T. Tran-Nguyen, Nader Sallam, Bruno P. Le Ru, Desmond Conlong, Kevin Powell, Andrew Ward, Andrew Mitchell

All Peer-Reviewed Publications

Lepidopteran stemborers are among the most damaging agricultural pests worldwide, able to reduce crop yields by up to 40%. Sugarcane is the world’s most prolific crop, and several stemborer species from the families Noctuidae, Tortricidae, Crambidae and Pyralidae attack sugarcane. Australia is currently free of the most damaging stemborers, but biosecurity efforts are hampered by the difficulty in morphologically distinguishing stemborer species. Here we assess the utility of DNA barcoding in identifying stemborer pest species. We review the current state of the COI barcode sequence library for sugarcane stemborers, assembling a dataset of 1297 sequences from 64 species. Sequences were …

Egg-Laying Decisions Based On Olfactory Cues Enhance Offspring Fitness In Stomoxys Calcitrans L. (Diptera: Muscidae), Steve B.S. Baleba, Baldwyn Torto, Daniel Masiga, Christopher W. Weldon, Merid N. Getahun

All Peer-Reviewed Publications

Selection of oviposition substrate is critical in holometabolous insects. Female stable flies, Stomoxys calcitrans, locate and select vertebrate herbivore dung in which they lay their eggs. However, the preference for vertebrate herbivore dung by S. calcitrans females, its fitness consequences for offspring, and the semiochemicals used to locate and select oviposition substrates remain unclear. Using oviposition choice tests and life table bioassays we found that gravid female S. calcitrans prefer to oviposit on donkey and sheep dung, which also improves the performance of their offspring. GC-MS analysis followed by random forest classification identified β-citronellene and carvone as the most important …

Molasses Grass Induces Direct And Indirect Defense Responses In Neighbouring Maize Plants, Tigist A. Tolosa, Amanuel Tamiru, Charles A.O. Midega, Johnnie Van Den Berg, Michael A. Birkett, Christine M. Woodcock, Toby J.A. Bruce, Segenet Kelemu, John A. Pickett, Zeyaur R. Khan

All Peer-Reviewed Publications

Plants have evolved intricate defence strategies against herbivore attack which can include activation of defence in response to stress-related volatile organic compounds (VOCs) emitted by neighbouring plants. VOCs released by intact molasses grass (Melinis minutiflora), have been shown to repel stemborer, Chilo partellus (Swinhoe), from maize and enhance parasitism by Cotesia sesamiae (Cameron). In this study, we tested whether the molasses grass VOCs have a role in plant-plant communication by exposing different maize cultivars to molasses grass for a 3-week induction period and then observing insect responses to the exposed plants. In bioassays, C. partellus preferred non-exposed maize landrace plants …

Ethylene Response Factor (Erf) Genes Modulate Plant Root Exudate Composition And The Attraction Of Plant Parasitic Nematodes, Steven Dyer, Ryan Weir, Deborah Cox, Xavier Cheseto, Baldwyn Torto, Johnathan J. Dalzell

All Peer-Reviewed Publications

Plant root exudates are compositionally diverse, plastic and adaptive. Ethylene signalling influences the attraction of plant parasitic nematodes, presumably through the modulation of root exudate composition. Understanding this pathway could lead to new sources of crop parasite resistance. Here we used Virus-Induced Gene Silencing to knock down the expression of two Ethylene Response Factor (ERF) genes, ERF-E2 and ERF-E3, in tomato. Root exudates were significantly more attractive to the PPNs Meloidogyne incognita and Globodera pallida following knockdown of ERF-E2, which had no impact on the attraction of Meloidogyne javanica. Knockdown of ERF-E3 had no impact on the attraction of Meloidogyne …

Species-Specific Transcriptional Profiles Of The Gut And Gut Microbiome Of Ceratitis Quilicii And Ceratitis Rosa Sensu Stricto, Fathiya M. Khamis, Paul O. Mireji, Fidelis L.O. Ombura, Anna R. Malacrida, Erick O. Awuoche, Martin Rono, Samira A. Mohamed, Chrysantus M. Tanga, Sunday Ekesi

All Peer-Reviewed Publications

The fruit fly species, Ceratitis rosa sensu stricto and Ceratitis quilicii, are sibling species restricted to the lowland and highland regions, respectively. Until recently, these sibling species were considered as allopatric populations of C. rosa with distinct bionomics. We used deep Next Generation Sequencing (NGS) technology on intact guts of individuals from the two sibling species to compare their transcriptional profiles and simultaneously understand gut microbiome and host molecular processes and identify distinguishing genetic differences between the two species. Since the genomes of both species had not been published previously, the transcriptomes were assembled de novo into transcripts. Microbe-specific transcript …

Differential Response To Plant- And Human-Derived Odorants In Field Surveillance Of The Dengue Vector, Aedes Aegypti, Wyckliff P. Omondi, Eunice A. Owino, David Odongo, Joseph M. Mwangangi, Baldwyn Torto, David P. Tchouassi

All Peer-Reviewed Publications

Linalool oxide (LO) and hexanoic acid (HA) represent plant- and human-derived odorants, respectively, previously found as attractants for the dengue vector Aedes aegypti. Here, we investigated if a blend of both compounds can improve captures of this mosquito species in field trials in two dengue endemic sites, Kilifi and Busia Counties in Kenya. Ae. aegypti captures were significantly higher in Kilifi than Busia (χ21,142 = 170.63, P < 0.0001) and varied by treatments (χ25,137 = 151.19, P = 0.002). We found that CO2-baited BG Sentinel traps combined with a blend of both odorants decreased Ae. aegypti captures about 2- to 4-fold compared to captures with the individual compounds (LO or HA) used as positive controls. This was the case for all blends of LO and HA, irrespective of the doses tested. Our findings indicate that combining plant- and human-derived odors may elicit a masking effect in trapping Ae. aegypti. These results partly corroborate previous findings for malaria mosquitoes which showed that combining lures from both host sources either decreases or increases trap catches depending on the dose. Further investigations in the usefulness of combining plant and animal odorants in mosquito trapping are therefore necessary.

Ample Glycosylation In Membrane And Cell Envelope Proteins May Explain The Phenotypic Diversity And Virulence In The Mycobacterium Tuberculosis Complex, Alemayehu Godana Birhanu, Solomon Abebe Yimer, Shewit Kalayou, Tahira Riaz, Ephrem Debebe Zegeye, Carol Holm-Hansen, Gunnstein Norheim, Abraham Aseffa, Markos Abebe, Tone Tønjum

All Peer-Reviewed Publications

Multiple regulatory mechanisms including post-translational modifications (PTMs) confer complexity to the simpler genomes and proteomes of Mycobacterium tuberculosis (Mtb). PTMs such as glycosylation play a significant role in Mtb adaptive processes. The glycoproteomic patterns of clinical isolates of the Mycobacterium tuberculosis complex (MTBC) representing the lineages 3, 4, 5 and 7 were characterized by mass spectrometry. A total of 2944 glycosylation events were discovered in 1325 proteins. This data set represents the highest number of glycosylated proteins identified in Mtb to date. O-glycosylation constituted 83% of the events identified, while 17% of the sites were N-glycosylated. This is the first …

Computing Maximum And Minimum With Privacy Preservation And Flexible Access Control, Wenxiu Ding, Zheng Yan, Xinren Qian, Robert H. Deng

Research Collection School Of Computing and Information Systems

With the fast development of Internet of Things, huge volume of data is being collected from various sensors and devices, aggregated at gateways, and processed in the cloud. Due to privacy concern, data are usually encrypted before being outsourced to the cloud. However, encryption seriously impedes both computation over the data and sharing of the computation results. Computing maximum and minimum among a data set are two of the most basic operations in machine learning and data mining algorithms. In this paper, we study how to compute maximum and minimum over encrypted data and control the access to the computation …

Mammalian Artificial Chromosomes As A Synthetic Biology Tool For Transgene Expression, Charles Wang

All Theses

Mammalian artificial chromosomes, or MACs, have been studied as a potential avenue for hosting large numbers of transgenes in mammalian cells. MACs have several advantages over viral-based methods for transgene expression, including a lack of limits on loading capacity, which bypasses issues associated with integration into the genome. One area of research in which MACs can be applied is the biomanufacturing of protein-based therapeutics, where reported genome instability in Chinese hamster ovary (CHO) cells can lead to reduced product titer. MACs can potentially aid in solving this issue by providing alternate hosting sites for transgenes for integration of protein-based therapeutic …

The Case Against Expanding Defamation Law, Yonathan A. Arbel, Murat C. Mungan

Faculty Scholarship

It is considered axiomatic that defamation law protects reputation. This proposition—commonsensical, pervasive, and influential—is faulty. Underlying this fallacy is the failure to appreciate audience effects: the interaction between defamation law and members of the audience.

Defamation law seeks to affect the behavior of speakers by making them bear a cost for spreading untruthful information. Invariably, however, the law will also affect members of the audience, as statements made in a highly regulated environment tend to appear more reliable than statements made without accountability. Strict defamation law would tend to increase the perceived reliability of statements, which in some cases can …

A Natural Right To Copy, Glynn Lunney

Faculty Scholarship

In this symposium, we gather to celebrate the work of Wendy Gordon. In this essay, I revisit her article, A Property Right in Self-Expression: Equality and Individualism in the Natural Law of Intellectual Property. In the article, Professor Gordon first used the "no-harm" principle of John Locke to justify copyright as natural right and then used his “enough-and-as-good” proviso to limit that right. Her second step turned natural rights approaches to copyright on its head. Through it, she showed that even if we accept copyright as natural right, that acceptance does not necessarily lead to a copyright of undue breadth …

Better Together? Combining Cover Crop Mulches, Organic Herbicides, And Weed Seed Biological Control In Reduced-Tillage Crop Systems, Danielle Gray Lewis

All Theses

Weed management in organic agriculture is one of the greatest challenges farmers face and many rely heavily on mechanical tactics that are labor-intensive and negatively impact the environment. Although more complex, farmers could integrate various cultural, chemical, and biological weed management tools to potentially reduce the need for tillage. A weed management system that incorporates the use of cover crop mulch could suppress weeds and promote weed seed predation services by granivorous insects. Since cover crops decompose as the season progresses, precise applications of organic herbicides could extend weed management towards the end of the season. In our studies, we …

Theory Of Extreme Optical Concentration In All-Dielectric Waveguides, Nazmus Sakib

All Theses

Dielectric waveguides are the solution to the ultra-fast optical communication. In all-dielectric waveguide systems, the boundary condition of Maxwell’s electromagnetic equation can be exploited. Crucially dielectric materials have very low optical losses compared to metal hence the plasmonic structures. Due to very high losses, plasmonic structures are not suitable for practical usage. Achieving small mode dimensions has become an important factor in modern devices since smaller mode dimensions fosters high device density, efficiency, and or performance in a wide array of photonic systems. Keeping these criteria in focus, a transversely structured all-dielectric waveguide has been introduced in this thesis which …

Reverse Contributors? African State Parties, Icsid, And The Development Of International Investment Law, Olabisi D. Akinkugbe

Articles, Book Chapters, & Popular Press

International investment disputes involving African states before the International Centre for Settlement of Investment Disputes (ICSID) have generated significant critical inquiry. Yet, accounts of their contribution to the development of international investment law as a result of these dispute are limited. This article addresses this gap. It examines the contribution of some of the high-profile ICSID disputes involving African states to the development of international investment law. Notwithstanding the charges against African States in ICSID, I contend that the involvement of African States in ICSID Disputes has contributed to the development of international investment law. In particular, the jurisprudence that …

Simulation Model To Evaluate Effectiveness Of Queue Management Tool In Supermarket Retail Chain, Michelle L. F. Cheong, Yong Qing Chia

Research Collection School Of Computing and Information Systems

As part of its continuous process to improve operational excellence and productivity, a retail company in South East Asia trialed the usage of a commercial market retail tool, known as Queue Buster, to improve queue management processes in its physical stores. We employed Queuing Theory to determine the effectiveness of implementing the Queue Buster. Specifically, we constructed a queuing simulation model based on input parameters derived from queuing data collected at a pilot store. Three main performance metrics - Wait Time, System Time and System Length were measured fortwo different queue systems, with and without the implementation of Queue Buster. …

Little Farm Hands: Rural Child Labor, Family, And Memory In The U.S. Southwest, 1890-1940, Jairo E. Marshall

History ETDs

Child labor was a traditional subsistence and agricultural practice throughout the rural Southwest. Between 1890 and 1940 a series of changes occurred within agriculture, ranching, and rural land/labor patterns in New Mexico and Texas. However, child labor remained a useful economic strategy for families well into this period, because it remained grounded in environmental challenges, cultural practices, agrarian ideologies, and children’s social and physical development. Agribusinesses took advantage of this labor pool, while schools and communities continued to allow children to labor, believing it to be either necessary or beneficial.

Families and children continued to have agency to determine the …

The Cognition Of Controversy: Examining Policy Elites’ Narrative Cognition And Communication Around Hydraulic Fracturing Practices In The U.S., Rachael M. Moyer

Graduate Theses and Dissertations

The use of hydraulic fracturing (HF) technologies to extract oil and gas in the United States has sparked contentious policy debates, producing inconsistent and inefficient policies that have done little to address the impacts of HF in any comprehensive way. Debates are accompanied by competing policy narratives that position HF as either an environmental threat or an economic opportunity, but little is known about how policy narratives around HF are used by individuals. This dissertation systematically examines how individuals cognitively internalize elements of competing HF policy narratives. Organized into three empirical chapters, this dissertation analyzes narrative cognition (Jones, Shanahan, and …

Evaluation Of A Proprietary Slow-Release Oxytocin Therapy And Return Of The Luteolytic Mechanism In Mares, Brendan Andrew Sarnecky

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Prolonging function of the corpus luteum (CL) is a method of suppressing estrus that maintains secretion of endogenous progesterone to keep mares out of heat naturally. The use of oxytocin to prolong CL function is becoming more popular. In these therapies, upregulation of cyclooxygenase-2 is inhibited, which impairs prostaglandin F2α ( PGF2α) production. Intramuscular (IM) administration of 60 IU of oxytocin once daily from 7 to 14 days after ovulation is currently the most common treatment protocol. Although that protocol is efficacious in ≥70% of treated mares, the need for daily administration is a drawback to its use. A proprietary …

A Comparison Of Cognitive Restructuring And Thought Listing For Excessive Acquiring In Hoarding Disorder, Hannah C. Levy, Randy O. Frost, Elizabeth A. Offermann, Gail Steketee, David F. Tolin

Psychology: Faculty Publications

Excessive acquiring is a common symptom of hoarding disorder (HD). Little is known about subjective distress associated with acquiring in HD. The present study examined acquiring-related distress and reactions to cognitive restructuring (CR) in 92 individuals with HD and 66 community control (CC) participants. All participants identified an item of interest at a high-risk acquiring location and then decided whether or not to acquire the item. HD participants completed the acquiring task while receiving a CR-based intervention or a thought-listing (TL) control condition. Results showed that HD participants reported more severe distress and greater urges to acquire the item of …

Electrocoagulation As A Pretreatment For Electroxidation Of E. Coli, William Lynn, Joe Heffron, Brooke K. Mayer

Civil and Environmental Engineering Faculty Research and Publications

Insufficient funding and operator training, logistics of chemical transport, and variable source water quality can pose challenges for small drinking water treatment systems. Portable, robust electrochemical processes may offer a strategy to address these challenges. In this study, electrocoagulation (EC) and electrooxidation (EO) were investigated using two model surface waters and two model groundwaters to determine the efficacy of sequential EC-EO for mitigating Escherichia coli. EO alone (1.67 mA/cm², 1 min) provided 0.03 to 3.9 logs mitigation in the four model waters. EC alone (10 mA/cm², 5 min) achieved ≥1 log E. coli mitigation in all …

Sustainable Flowers, Fall 2019, Rose Ho, Annie Yaris, Maia Sanders, Sophie Watterson

Sustainability Exchange Projects

The Sustainable Flowers Initiative, led by Professor Suzanne Langlois of Arts & Sciences, aimed to shift the supply chain of floral arrangements on campus from depending upon resource-intensive, chemical-heavy international suppliers. Students developed a strategy for working collaboratively with campus event organizers, local floral suppliers, and WU Grounds & Maintenance to make floral arrangements more sustainable.

Stl Energy Project, Fall 2019, Kk Cyrus, Lulu Feldman, Samantha Wiebe, Daniel Lee, Sam Movius, Lianghao Tang

Sustainability Exchange Projects

Objectives: 1. Understand the motivations of benchmarking 2. Create video case studies featuring energy efficient buildings to improve the public's understanding of benchmarking 3. Promote engagement in benchmarking to assist St. Louis's energy reduction targets. Case Studies: Embassy Suites in Downtown St. Louis; 500 N. Broadway, Old Post Office.

Sustainability Exchange, Washington University in St. Louis, Fall 2019

Examining Pediatric Tourette Syndrome, Alyssa Orlando

Honors Projects

Pediatric Tourette Syndrome is a complex neurological disorder. Many people associate it with swearing, however in reality it is very rarely associated with that. This paper entails my own personal experiene with Tourette Syndrome and examines potential treatment options in the pediatric population.

Comparing The Care Of Pregnant Women In Ghana And The United States, Olivia Zander

Honors Projects

During pregnancy, factors such as maternal nutrition, location of delivery, the number of antenatal care visits, maternal age, and more can all impact the health of both the mother and the developing fetus. All of these factors are subject to change based on where the mother lives and the resources that her country has to offer her. The objective of this paper was to compare and contrast the nutritional and non-nutritional care of pregnant women in Ghana and the United States and its impact on maternal/child mortality in the two countries. The information collected for this project was taken from …

Exploration Of Naturopathic Medicine For Pregnant And Laboring Women, Megan Latreille

Honors Projects

Exploration of natural medicine has become increasingly common among individuals. With proper use, natural medicine can help treat many common ailments experienced during pregnancy, delivery, and postpartum. This paper serves to shed light on naturopathic medicinal techniques for expectant mothers and families, so that they may implement such in their own lives throughout pregnancy, during labor, and after birth. Yoga can be adapted and utilized during antenatal and postpartum periods to help with stress levels, depression, and physical health. Hypnosis, meditation, and hypnobirthing provide similar effects such as decreased stress and increased contentment; promoting a smoother and more effective labor …

A Simulation To Improve Nursing Students’ Understanding Of The Experience Of Middle Eastern Refugees, Ibtisam Matta

Honors Projects

A simulation was constructed with the aim of improving nursing students’ understanding of the needs of Middle Eastern refugees.

The research questions were: what are student nurses’ perceptions on the unique culture of the Middle Eastern refugee population after participating in a simulation of this populations’ experiences, and how will these influence the students’ interactions with this population in their nursing career?

Approval was granted from the Grand Valley State University (GVSU) Internal Review Board (IRB) to conduct the research. Student nurses were recruited through GVSU Kirkhoff College of Nursing (KCON) Student Nursing Association (SNA); the event was one of …

Pediatric Acute Lymphoblastic Leukemia: A Review, Luke Geierman

Honors Projects

Acute Lymphoblastic Leukemia (ALL) is the most commonly diagnosed pediatric cancer and the most frequent cancer-induced cause of death among young people. Despite this fact, tremendous progress in treating the disease has been made in the last 50 years. This systematic literature review examines the incidence of the disease as well as the importance of risk stratification in treatment planning. The role of genetics in ALL risk stratification, specifically hypodiploidy and hyperdiploidy, is also considered. Finally, current treatment protocols, treatment failure, and the future of research and treatments are all each examined.

Biochar As A Means Of Water Purification In Haiti, Caolan Keenan

Honors Projects

Our research set out to determine if biochar, a compound made by burning organic plant matter in a low oxygen environment, would be a suitable means of removing E. coli populations from contaminated water collected from the Grand River in Allendale, MI using simple materials to construct a filter that could be constructed and used in Haiti. Previous research has shown biochar to be effective at trapping bacteria and other contaminants in the porous surface and by binding other non organic contaminants. We constructed multiple iterations of these filters using gravel, sand, and biochar and ran three live tests with …

Laker Survival Guide, Clara Bernal

Honors Projects

It was not until her Junior year of college when she became a Peer Mentor for incoming freshman students, that Clara created a mini guide to GVSU's long list of resources for students. She prepared this guide for her mentees as initially what she called, "Things you'll want to use to survive college." Clara wanted to hand her mentees all of the resources she had learned in three years on day one. This list included various academic support resources, places to feel culturally accepted, and resources for non-traditional students. After receiving a lot of positive feedback from her mentees, peers, …