Digital Commons Network^™

Development Of Solution Blow Spun Nanofibers As Electrical And Whole Cell Biosensing Interfaces, Craig Levar Miller

All Dissertations

Infectious pathogens place a huge burden on the US economy with more than $120 billion spent annually for direct and indirect costs for the treatment of infectious diseases. Rapid detection schemes continue to evolve in order to meet the demand of early diagnosis. In chronic wound infections, bacterial load is capable of impeding the healing process. Additionally, bacterial virulence production works coherently with bacterial load to produce toxins and molecules that prolongs the healing cycle. This work examines the use of nonwoven polymeric conductive and non-conductive nanofiber mats as synthetic biosensor scaffolds, drug delivery and biosensor interface constructs. A custom-made …

Evapotranspiration In Mid-South Rice Production, Colby Wade Reavis

Graduate Theses and Dissertations

Rice provides much needed sustenance to a large portion of the global population, particularly in the developing world. With stress placed on food production systems under the reality of climate change and an increasing global population, rice production systems require solutions to a number of issues, including a limited water supply. As producers explore new strategies for conserving local water resources to continue to maintain yields, new irrigation strategies and technologies are being developed and validated for use at commercial production scales. Alternate wetting and drying (AWD) is an irrigation practice that provides water savings through the capture of rainfall …

Northern Bobwhite Occupancy Patterns On Multiple Spatial Scales Across Arkansas, Ellery V. Lassiter, Marcus Asher, Grace Christie, Connor Gale, Andrhea Massey, Cody Massery, Christopher R. Middaugh, John T. Veon, Brett A. Degregorio

Biological Sciences Faculty Publications and Presentations

Northern bobwhite Colinus virginianus populations have been rapidly declining in the eastern, central, and southern United States for decades. Land use change and an incompatibility between northern bobwhite resource needs and human land use practices have driven declines. Here, we applied occupancy analyses on two spatial scales (state level and ecoregion level) to more than 5,000 northern bobwhite surveys conducted over 6 y across the entire state of Arkansas to explore patterns in occupancy and land use variables, and to identify priority areas for management and conservation. At the state level, northern bobwhite occupied 29% of sites and northern bobwhite …

Proof Positive: Applications Of Chemical Analysis Techniques In Art Forgery Detection, Joseph Fryc

Museum Studies Theses

In response to the subjective nature of older forgery detection techniques, modern forgery detection methods rely heavily on chemical analysis of the materials utilized in a given piece of work in order to make authenticity determinations. Chemical methods of detection at their core provide an objective determination of facts regarding the composition of materials utilized in contested pieces and provide a relative date of production for those materials. In this way, chemical analysis helps service the field of modern forgery detection as a direct compliment to traditional stylistic analysis, by providing extra data on the piece that can often be …

Field Evaluation Of A New Third Generation Push-Pull Technology For Control Of Striga Weed, Stemborers, And Fall Armyworm In Western Kenya, Duncan Cheruiyot, Frank Chidawanyika, Charles A.O. Midega, Jimmy O. Pittchar, John A. Pickett, Zeyaur R. Khan

All Peer-Reviewed Publications

Production of cereal crops in sub-Saharan Africa is threatened by parasitic striga weeds and attack by stemborers and the invasive fall armyworm (FAW), compounded by increasing hot and dry conditions. A climate-smart push-pull technology (PPT) significantly reduces effects of these biotic challenges. To improve further resilience of the system to climate change, more adapted and suitable companion plants were identified and integrated in a new version of PPT, termed 'third generation PPT'. Our study evaluates field performance and farmer opinions of this new version in comparison with the earlier version, climate-smart PPT, and farmers' own practices of growing maize in …

The Dilemma Of Guinea Grass (Megathyrsus Maximus): A Valued Pasture Grass And A Highly Invasive Species, Aaron C. Rhodes, Robert M. Plowes, John A. Goolsby, John F. Gaskin, Boaz Musyoka, Paul André Calatayud, Massimo Cristofaro, Eric D. Grahmann, Dino J. Martins, Lawrence E. Gilbert

All Peer-Reviewed Publications

On a global scale, invasive grasses threaten biodiversity and ecosystem function. Nevertheless, the importation of forage grasses is a significant economic force driven by globalization. Pastureland and rangeland are of critical economic and ecological importance, but novel grass species may lead to invasion. Recognizing that economically important species can also be ecologically damaging creates a contentious debate for land managers, policymakers, and ecologists alike. Many Afrotropical perennial grass species have been intentionally introduced pantropically given their high forage production and resistance to stress. However, these traits may also confer competitive ability, increasing the possibility of unintended escape and invasion. Further, …

An Update On The Distribution Of Glossina (Tsetse Flies) At The Wildlife-Human-Livestock Interface Of Akagera National Park, Rwanda, Richard S. Gashururu, Samuel M. Githigia, Methode N. Gasana, Richard Habimana, Ndichu Maingi, Giuliano Cecchi, Massimo Paone, Weining Zhao, Daniel K. Masiga, James Gashumba

All Peer-Reviewed Publications

Background: Glossina (tsetse flies) biologically transmit trypanosomes that infect both humans and animals. Knowledge of their distribution patterns is a key element to better understand the transmission dynamics of trypanosomosis. Tsetse distribution in Rwanda has not been well enough documented, and little is known on their current distribution. This study determined the current spatial distribution, abundance, diversity, and seasonal variations of tsetse flies in and around the Akagera National Park. Methods: A longitudinal stratified sampling following the seasons was used. Biconical traps were deployed in 55 sites for 6 consecutive days of each study month from May 2018 to June …

Tomb And Temple : The Poet’S Use Of Positive Body Imagery To Communicate Messages Of Psychological Wellbeing, Shelby Elizabeth Poulin

Masters Theses

Mary Oliver writes that imagery is the texture of a poem, and the “detailed, sensory language incorporating images . . . gives the poem dash and tenderness” (Oliver 92). Imagery brings poetry to life, offering the reader a whole-body experience over simple description. Oliver cautions, however, that imagery is powerful and should be used responsibility, further implying that this texture can also become jolting, harsh, or offensive if used incorrectly (Oliver 107-108). With this caution in mind, the purpose of my forty-six poem collection—Tomb and Temple: Letters to the Body—is to use images of the body responsibly, in a way …

Biological Evaluation And Theoretical Study Of Bi-Dentate Ligand For Amoxicillin Derivative With Some Metal Ions, Sahar S. Hassan, Nidhal M. Hassan, Shaymaa Rajab Baqer, Asmaa M. Saleh

Baghdad Science Journal

In this paper, the complexes of Shiff base of Methyl -6-[2-(diphenylmethylene)amino)-2-(4-hydroxyphenyl)acetamido]-2,2-dimethyl-5-oxo-1-thia-4-azabicyclo[3.2.0]heptane-3-carboxylate (L) with Cobalt(II), Nickel(II), Cupper(II) and Zinc(II) have been prepared. The compounds have been characterized by different means such as FT-IR, UV-Vis, magnetic moment, elemental microanalyses (C.H.N), atomic absorption, and molar conductance. It is obvious when looking at the spectral study that the overall complexes obtained as monomeric structure as well as the metals center moieties are two-coordinated with octahedral geometry excepting Co complexes that existed as a tetrahedral geometry. Hyper Chem-8.0.7 program was employed, after calculating the heat of formation (ΔH°f), binding energy (ΔEb), dipole moment( µ ), …

Drinking Water Quality Evaluation Of Hand Pumping Wells Using Water Quality Index And Standard Algal Toxicity Testing In Mansoura And Talkha Cities, Egypt, Marriam M. Ismail, Ahmed M. El-Naggar, Mai I. El-Gammal, Ahmed E. Hagras

Baghdad Science Journal

Six house-hold Abyssinian pumps distributed in different villages of Mansoura (Mans-I, Mans-II and Mans-III) and Talkha (Talk-I, Talk-II and Talk-III) cities, Egypt, have been selected for regular seasonal water quality assessment during 2017. Water samples have been collected within the mid-periods of four seasons Standard assessment tools were employed for the integrated water quality assessment including Water Quality Index (WQI) and ISO standard algal toxicity test. WQI displayed remarkable local and seasonal variations with excellent (≥ 90) and good (70 - 89) only recorded for water samples collected from Mans-I pump located in sparsely populated area and far 50 meters …

Designing Primers With A Plant Signal Peptide To Enhance The Expression Of Gba1 In Transgenic Soybean Plants, Zainab Tuama Al-Dallee

Baghdad Science Journal

Transgenic plants offer advantages for the manufacture of recombinant proteins with terminalmannose residues on their glycan chains. So plants are chosen as source of pharmaceutical products and forthe development of alternative expression systems to produce recombinant lysosomal enzymes. In thepresent study the sequence of the natural cDNA encoding for the human lysosomal enzymeglucocerebrosidase (GCD) was modified to enhance its expression in soybean plants. The glucocerebrosidasegene signal peptide was substituted with that signal peptide for the Arabidopsis thaliana basic endochitinasegene to support the co-translational translocation into the endoplasmic reticulum (ER), and the storagevacuole. So, targeting signal from tobacco chitinase A, to …

Antimicrobial Effect Of Eco- Friendly Silver Nanoparticles Synthesis By Iraqi Date Palm (Phoenix Dactylifera) On Gram-Negative Biofilm-Forming Bacteria, Shaimaa Obaid Hasson, Sumod Abdul Kadhem Salman, Shurooq Falah Hassan, Shatha Mohammed Abbas

Baghdad Science Journal

Date palm silver nanoparticles are a green synthesis method used as antibacterial agents. Today, there is a considerable interest in it because it is safe, nontoxic, low costly and ecofriendly. Biofilm bacteria existing in marketed local milk is at highly risk on population health and may be life-threatening as most biofilm-forming bacteria are multidrug resistance. The goal of current study is to eradicate biofilm-forming bacteria by alternative treatment green synthesis silver nanoparticles. The biofilm formation by bacterial isolates was detected by Congo red method. The silver nanoparticles were prepared from date palm(khestawy) fruit extract. The formed nanoparticles were characterized with …

A Prevalence Study Of Entamoeba Spp. In Basrah Province Using Different Detection Methods, Athraa Abdulameer Al-Hilfi, Maha Khalil Al-Malak, Muslim Abdulrahman Al-Tomah

Baghdad Science Journal

This study aims to determine the prevalence of Entamoeba histolytica, Entamoeba dispar andEntamoeba moshkovskii by three methods of diagnosis (microscopic examination, cultivation and PCR) thatwere compared to obtain an accurate diagnosis of Entamoeba spp. during amoebiasis. Total (n=150) stoolsamples related to patients were (n = 100) and healthy controls (n= 50). Clinically diagnosed stool samples(n=100) were collected from patients attending the consultant clinics of different hospitals in Basrah duringthe period from January 2018 to January 2019. The results showed that 60% of collected samples werepositive in a direct microscopic examination. All samples were cultivated on different media; the Brain heartinfusion …

Qtaim Study Of The Bonding In Triosmium Trihydridecluster[Os3(Μ-H)3(Μ3-ɳ2-Cc7h3(2-Ch3)Ns)(Co)8], Nadia Ezzat Al-Kirbasee, Shatha Raheem Helal Alhimidi, Muhsen Abood Muhsen Al-Ibadi

Baghdad Science Journal

The Atoms in Molecules (AIM) analysis for triosmium cluster, which contains trihydridede, carbon, carbonyl and 2-methylbenzothiazolide ligands, [Os3(µ-H)3(µ3-ɳ2-CC7H3(2-CH3)NS)(CO)8] is reported. Bonding features in this cluster has been analyzed based on QTAIM ("Quantum Theory of Atoms in Molecules") in this work. The topological indices derived from electron density of relevant interactions in triosmium compound have been studied. The major interesting point of the AIM analyses is that the core of part (Os3H3) reveals the absence of any critical points and bond paths connecting any pairs of Os metal atoms. However, bond critical points with their bond paths occurring between all Os-H …

Toward Lignin Valorization: Development Of Rhodococcus Opacus Pd630 As A Chassis For Triacylglycerol (Tag) Production From Recalcitrant Aromatic Feedstocks, Rhiannon R. Carr

McKelvey School of Engineering Graduate Student Theses & Dissertations

The advent of the industrial era was precipitated by the discovery of fossil fuels, and ushered in unprecedented changes for humanity included but not limited to the development of rapid transit and communications, improvements to food distribution and preservation, the mass production of goods, and a radical rearrangement of communities from relatively small enclaves to metropolises. With all the benefits, however, come considerable costs, especially to the global environment. Greenhouse gas emissions, built up over centuries of unregulated combustion, have precipitated a rate of global temperature change unparalleled in the 4.5 billion-year history of this planet. In order to preserve …

Computational Design Of Β-Fluorinated Morphine Derivatives For Ph-Specific Binding, Makena Augenstein, Nayiri Alexander, Matthew Gartner

Student Scholar Symposium Abstracts and Posters

Molecular extension and dissection techniques are used to design a morphine derivative that promotes selective binding in inflamed tissue due to its lower pH while avoiding dangerous activation in the brain. Morphine is used to treat pain associated with inflammation. While being effective analgesics, opioids carry the risk of central side effects, including addiction, respiratory depression, and sedation. Opioids are agonists that bind to the μ-opioid peptide receptor (MOR) within central and peripheral nerves and act via a G-protein coupled receptor pathway.

Deprotonation of the tertiary amine induces a negative charge on the nitrogen, discouraging binding at physiological pH (pH=7.4). …

Development Of Comprehensive Theoretical Morphospaces For Canine Cranial Morphology, Alexa Ortega, Nicholas Hebdon, Lindsay Waldrop

Student Scholar Symposium Abstracts and Posters

Throughout the evolution of the family Canidae, there is a continuous belief that canines have an exceptional olfactory system which allows them to have a heightened sense of smell. Because of this olfactory sophistication, canines have become prevalent as detection animals in the military, homeland security, law enforcement, forensics, and civilian applications. However, while the trait is highly regarded, the exact role of nasal morphology is understudied. We aim to investigate the influences of nasal cavity and internal structure morphology in odor detection. However, nasal structure is a sophisticated morphological target and requires innovative solutions to capture the key variables …

Thinkmed: Providing An Environment For Disadvantaged Students To Explore Stem, Steven Trinh, Lauren Dudley, Peter Chang

Student Scholar Symposium Abstracts and Posters

ThinkMED is a nonprofit initiative offering a four-week curriculum specifically designed to develop critical thinking and encourage evidence-based decision making. Each week’s content material revolves around the use of a ThinkMED Science Kit containing a wet lab experiment designed to supplement the content curriculum. Each experiment is formulated to be inclusive of all California Next Generation Science Standards K through 5. Contained within each week’s ThinkMED Science Kit is a unique QR code that directs the student to an interactive simulation of the experiment created by our team of computer scientists and graphic designers. At the end of each week, …

Fall 2021 Student Scholar Symposium Abstract Volume, Chapman University Center For Undergraduate Excellence

Student Scholar Symposium Abstracts and Posters

No abstract provided.

Eye-Transcriptome And Genome-Wide Sequencing For Scolecophidia: Implications For Inferring The Visual System Of The Ancestral Snake, David J. Gower, James F. Fleming, Davide Pisani, Freek J. Vonk, Harald M.I. Kerkkamp, Leo Peichl, Sonja Meimann, Nicholas R. Casewell, Christiaan V. Henkel, Michael K. Richardson, Kate L. Sanders, Bruno F. Simões

More Faculty of Science and Engineering Research

Molecular genetic data have recently been incorporated in attempts to reconstruct the ecology of the ancestral snake, though this has been limited by a paucity of data for one of the two main extant snake taxa, the highly fossorial Scolecophidia. Here we present and analyze vision genes from the first eye-transcriptomic and genome-wide data for Scolecophidia, for Anilios bicolor, and A. bituberculatus, respectively. We also present immunohistochemistry data for retinal anatomy and visual opsin-gene expression in Anilios. Analyzed in the context of 19 lepidosaurian genomes and 12 eye transcriptomes, the new genome-wide and transcriptomic data provide evidence for a much …

Current Status And Natural History Of The Critically Endangered Variable Harlequin Toad (Atelopus Varius) In Costa Rica, C Barrio-Amorós, G Chaves, R Puschendorf

School of Biological and Marine Sciences

No abstract provided.

Economic Forecasting In An Epidemic: A Break From The Past?, Hwee Kwan Chow, Keen Meng Choy

Research Collection School Of Economics

This paper aims to investigate whether the predictive ability and behaviour of professional forecasters are different during the Covid-19 epidemic as compared with the global financial crisis of 2008 and normal times. To this end, we utilise a survey of professional forecasters in Singapore collated by the central bank to analyse the forecasting record for GDP growth and CPI inflation. We first examine the point forecasts to document the extent of forecast failure in the pandemic crisis and test for behavioural explanations of the possible sources of forecast errors such as leader following and herding behaviour. Using percentile-based summary measures …

Modeling The Spatial Distribution Of The Current And Future Ecosystem Services Of Urban Tree Planting In Chicopee And Fall River, Massachusetts, R. Moody, N. Geron, M. Healy, J. Rogan, Deborah Martin

Geography

Mature urban tree canopy cover disrupts the local effects of urban heat islands and provides important ecosystem services such as energy savings through evaporation and shading, pollution removal, storm runoff control, and carbon sequestration. Sustainable urban tree canopy relies on the planting of juvenile trees. Typically, tree planting programs are only evaluated by the number of trees planted and there is a lack of analysis of juvenile trees post-planting. This study examines the value and distribution of energy savings provided by juvenile trees and how that value changes considering predicted tree growth and mortality by 2050. Using i-Tree Eco software, …

Nest Sanitation Behavior Does Not Increase The Likelihood Of Parasitic Egg Rejection In Herring Gulls, James B. Stratton, Donald C. Dearborn

All Faculty Scholarship

Birds’ behavioral response to brood parasitism can be influenced not only by evolution but also by context and individual experience. This could include nest sanitation, in which birds remove debris from their nests. Ultimately, nest sanitation behavior might be an evolutionary precursor to the rejection of parasitic eggs. Proximately, the context or experience of performing nest sanitation behavior might increase the detection or prime the removal of parasitic eggs, but evidence to date is limited. We tested incubation-stage nests of herring gulls Larus argentatus to ask whether nest sanitation increased parasitic egg rejection. In an initial set of 160 single-object …

School District Leadership And Racial Justice: Examining The Use Of A Culturally Responsive-Sustaining Framework To Advance Equity Between Black And White Student Populations Within New York State Public Education, Diane M. Wynne

Education Doctoral

The current climate in the United States reflects a heightened focus on examining and challenging systemic inequities that have long impacted Black individuals. Culturally responsive education efforts have increased as schools experience increasingly diverse populations. The purpose of this study was to gain an understanding of how district leaders are implementing the New York State Education Department (NYSED) Culturally Responsive-Sustaining (CR-S) Education Framework in advancing equity between their Black and White student populations. Challenges and barriers experienced in the implementation of this framework, and approaches and strategies needed to overcome these were also explored. Interviews with six school district leaders …

Mathematical Modelling Of Gene Regulatory Networks, Ruaa Rifaat Al-Shykhly, Lamyaa Mohammed Hameed

Journal of Economics and Administrative Sciences

This research includes the use of an artificial intelligence algorithm, which is one of the algorithms of biological systems which is the algorithm of genetic regulatory networks (GRNs), which is a dynamic system for a group of variables representing space within time. To construct this biological system, we use (ODEs) and to analyze the stationarity of the model we use Euler's method. And through the factors that affect the process of gene expression in terms of inhibition and activation of the transcription process on DNA, we will use TF transcription factors. The current research aims to use the latest methods …

An Assessment Of The Neurovascular Structures Of The Trigeminal Nerve And Their Relationship To Diet In Primates, Caitlin Yoakum

Graduate Theses and Dissertations

The inferior alveolar nerve (IAN) enters the mandible via the mental foramen, supplies nervous sensation to the mandibular teeth as it travels through the mandibular canal, and exits the mandibular foramen to send information to the brain to maintain chewing cycles and protect the teeth from damage. Although bony canals and foramina have been shown to form around soft-tissue structures, there are some examples (e.g., the hypoglossal nerve/canal) where the nervous structures do not comprise most of the canal/foramina space. It is important to know the size of nerves because it has been established that larger nerves convey more information …

Canine Microwear In Relation To Diet In Sumatran Primates And African Great Apes, Putu Pujiantari

Graduate Theses and Dissertations

This thesis considers canine microwear in relation to diet in five Sumatran primates (Pongo abelii, Hylobates lar, Hylobates agilis, Presbytis thomasi, and Macaca fascicularis) and two African great apes (Pan paniscus and Pan troglodytes schweinfurthii) using both microwear texture analysis and microwear feature analysis techniques. Statistical results for texture analysis show that there are significant differences in scale of maximum and heterogeneity. This indicates that some species have large pits on their canine surfaces, having these dominated by deep features at coarse scale yet have a slight microwear heterogeneity. For feature analysis, all variables show statistically significant variation. Variance in …

The Relationship Of Hospital Ceo Gender And The Patient Experience: The Role Of The Mediating Effects Of Hospital Characteristics, Lanean M. Lang

Electronic Theses and Dissertations

In this quantitative study, I investigated CEO gender and the patient experience in acute care hospitals in Texas for 2019. As the patient-experience has been the metric for quality patient care and hospital reimbursements, hospital CEOs play an important role in promoting positive patient experience as they lead the organization in strategic goals. The study is relevant as a shortage of experienced and qualified healthcare leaders is expected as baby-boomers retire. The lack of women leaders remains a challenging issue. The purpose of the study was to assess the gender differences of the CEO on the impact of patient experience …

Agents Of Bioshield: The Fda, Emergency Use Authorizations, And Public Trust, Kirstiana Perryman

Georgia Law Review

The SARS-CoV-2 pandemic spurred the U.S. Food & Drug Administration (FDA) to utilize the Emergency Use Authorization (EUA) procedure more than ever before. The pandemic pushed the relatively obscure procedure into public consciousness, making it a frequent topic of discussion and debate. The EUA procedure permits the FDA Commissioner to authorize the introduction of drugs, devices, or biological products into interstate commerce for use in an actual or potential emergency. To issue an authorization, the FDA Commissioner must determine that it is “reasonable to believe,” based on the “totality of the evidence,” that the product “may be effective.” This standard …