3286 research outputs found
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Community Conversations- The Green Book in Fayetteville, NC
No full textDr, Francena Turner, Dr. Crystal Edmonds of Fayetteville State University and Natalie Rodriguez, Associate Director of the North Carolina African American Heritage Commission, speak at the Chesnutt Library of Fayetteville State University about the history and importance of The Green Book in Fayetteville, North Carolina and surrounding areas.
Presented live on October 20, 2025 as part of Chesnutt Library\u27s Faculty Author Series and Community Conversations Program.https://digitalcommons.uncfsu.edu/faculty_author/1025/thumbnail.jp
Dr. Robert W. McGee - The Ethics of Tax Evasion, Philosophy of Taxation and Public Finance, The Ethics of Bribery and The Health Benefits of Tai Chi and Qigong
No full textDr. Robert McGee speaks at the Chesnutt Library of Fayetteville State University about his recent publications on tax evasion, bribery, and ethics.
Presented live on April 10, 2025 as part of Chesnutt Library\u27s Faculty Author Series.https://digitalcommons.uncfsu.edu/faculty_author/1013/thumbnail.jp
Criminal Justice Resources- August 2025
No full textA video describing and demonstrating the various resources offered by Chesnutt Library to students in the Criminal Justice program.https://digitalcommons.uncfsu.edu/tutorial_videos/1003/thumbnail.jp
Social engagement and health in an aging society: Impact of Basic Old-Age Pension in Korea
No full textDespite older people\u27s notable contributions to economic growth in Korea, a significant proportion of them were left financially unprepared for old age and faced a high risk of poverty after retirement. In 2007, the National Pension was reformed to gradually lower the income replacement ratio from 60 % to 40 %. The Korean government implemented the Basic Old-Age Pension (BOAP) to compensate for the loss in pension income in 2008. While the BAOP benefits mitigate income poverty, it may also have spillover effects on social activities and health outcomes that older people are likely to be deprived of. We use the 2006–2020 Korean Longitudinal Study of Aging for the analysis. Using a doubly robust difference-in-differences model and event study, we investigate the impact of BOAP on social engagement and the health of older people. The results show that BOAP recipients tend to have more frequent meetings with children and are likely to have a better relationship with children while they are less likely to participate in social groups and have fewer social group meetings. These results are more evident among those recipients who have received pension benefits for longer years. We find a greater positive impact of BOAP on the health of non-employed, non-married, and poor recipients and the social activities of women, employed, and non-poor recipients. The impact of BOAP may vary by gender, employment status, marital status, and poverty status but the overall results emphasize the continual assistance of BOAP in promoting the social engagement and health of older Koreans. © 2025 Elsevier B.V., All rights reserved
A Sensitive Electrochemical Cholinesterase-Inhibiting Biosensor for Organophosphorus Pesticides Based on Ti3C2TX MXene Quantum Dots
No full textOrganophosphorus pesticides (OPs) pose significant environmental and health risks due to their widespread use and toxicity, primarily by inhibiting acetylcholinesterase. Traditional detection methods are often slow and costly, highlighting the urgent need for advanced, sensitive, and accessible technologies. This study developed a highly sensitive electrochemical cholinesterase-inhibiting biosensor for OP pesticides, utilizing Ti3C2Tx MXene Quantum Dots (MQDs), which was synthesized via a hydrothermal method. The biosensor’s performance was characterized using electrochemical impedance spectroscopy, differential pulse voltammetry (DPV), and cyclic voltammetry. DPV proved to be the optimal technique, exhibiting an ultralow detection limit of 1 × 10−17 M and a wide linear range (10−14–10−8 M) for chlorpyrifos (a model OP) with an estimated inhibition constant of 62 nM. The biosensor demonstrated high selectivity for OPs (chlorpyrifos, acephate, glyphosate) over a non-target pyrethroid (permethrin), confirmed by distinct electrochemical signatures and compared to in vitro cholinergic activity assays in bean beetle homogenates. The enhanced performance is attributed to the high surface-to-volume ratio, quantum confinement effects, and superior conductivity of the MQDs, as well as the robust enzyme immobilization facilitated by glutaraldehyde cross-linking and a chitosan matrix. This work presents a promising platform for rapid, sensitive, and selective detection of OP pesticides, with potential applications in environmental monitoring and public health protection. © 2025 Elsevier B.V., All rights reserved
Bimetallic Nickel-Palladium Nanoparticles Supported on Multiwalled Carbon Nanotubes for Suzuki Cross-Coupling Reactions in Continuous Flow
No full textAn efficient Suzuki cross-coupling reaction under continuous flow conditions was developed utilizing an immobilized solid supported catalyst consisting of bimetallic nickel-palladium nanoparticles (Ni-Pd/MWCNTs). In this process, the reactants can be continuously pumped into a catalyst bed at a high flow rate of 0.6 mL/min and the temperature of 130 °C while the Suzuki products are recovered in high steady-state yields for prolonged continuous processing. The catalyst was prepared by mechanical shaking of the appropriate nickel and palladium salts using ball-mill energy without the requirement of any solvent or reducing agent. This straightforward, facile, and simple method allows for bulk production of Ni-Pd/MWCNTs nanoparticles with a small particle size ideal for application in continuous flow cross-coupling catalysis. The as-prepared catalyst mostly contains nickel (7.9%) with a very small amount of palladium (0.81%) according to ICP-OES analysis. This remarkable immobilized catalyst can be used several times for different Suzuki reactions with a minimum loss of reactivity and no detectable leaching of the metal nanoparticles. Notably, by modifying the groups on both aryl halides and phenylboronic acids, the method provides access to a diverse array of the Suzuki products in flow with high steady-state yield, making it suitable for applications in industrial and pharmaceutical scales. Moreover, several spectroscopic techniques were employed to identify the structure and composition of the as-prepared Ni-Pd/MWCNTs nanoparticles before and after the reaction in flow such as transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), BET surface area (physisorption), and FTIR spectroscopy. © 2025 Elsevier B.V., All rights reserved
Computer Vision-Based Multiple-Width Measurements for Agricultural Produce
No full textThe most common size measurements for agricultural produce, including fruits and vegetables, are length and width. While the length of any agricultural produce can be unique, the width varies continuously along its length. Single-width measurements alone are insufficient for accurately characterizing varying width profiles, resulting in an inaccurate representation of the shape or mean dimension. Consequently, the manual measurement of multiple mean dimensions is laborious or impractical, and no information in this domain is available. Therefore, an efficient alternative computer vision measurement tool was developed utilizing ImageJ (Ver. 1.54p). Twenty sample sets, comprising fruits and vegetables, with each representing different shapes, were selected and measured for length and multiple widths. A statistically significant minimum number of multiple widths was determined for practical measurements based on an object’s shape. The “aspect ratio” (width/length) was identified to serve as an effective indicator of the minimum multiple width measurements. In general, 50 multiple width measurements are recommended; however, even 15 measurements would be satisfactory ((Formula presented.) deviation from 50 widths). The developed plugin was fast (734 ms ± 365 ms CPU time/image), accurate (\u3e99.6%), and cost-effective, and it incorporated several user-friendly and helpful features. This study’s outcomes have practical applications in the characterization, quality control, grading and sorting, and pricing determination of agricultural produce. © 2025 Elsevier B.V., All rights reserved
Fabrication of antimicrobial nanocomposite mat using Lokta fiber
No full textLignocellulose biomass is being used in a wide range of applications including packaging materials, biofuels, paper, and cardboard. In Nepal, the biomass obtained from Lokta bushes (Daphne bhoula and Daphne papyracea) is traditionally being used by local paper industries and enterprises to make handmade paper and other value-added products. To increase the trade value of handmade paper and increase the sustainability of local industries, it is important to explore next-generation applications. In this study, lignocellulose biomass obtained from Lokta bushes was processed chemo-mechanically, pulped, and converted to a cellulose mat. The caliper, grammage, apparent density, Cobb 60, brightness, opacity, and tensile strength properties of the cellulose mat were systematically measured. The mat was then doped with Cu and Ag/ZnO nanoparticles following traditional reduction and hydrothermal methods to get a nanocomposite mat. The nanocomposite mat was characterized using UV–Vis, XRD, SEM, and TGA techniques. Characteristic features of the nanoparticles were confirmed through the obtained data. The antimicrobial activity of the nanocomposite mat was tested against two bacterial strains (Escherichia coli and Bacillus subtilis) and one fungal strain (Candida albicans), demonstrating significant antimicrobial activity, as indicated by zones of inhibition. The results obtained from this study suggested that Lokta lignocellulose biomass can be used in laboratory settings for the fabrication of a nanocomposite mat and the mat can be potentially used for antimicrobial packaging applications. © 2025 Elsevier B.V., All rights reserved
Twists of graded Poisson algebras and related properties
No full textWe introduce a Poisson version of the graded twist of a graded associative algebra and prove that every graded Poisson structure on a connected graded polynomial ring A:=k[x1,…,xn] is a graded twist of a unimodular Poisson structure on A, namely, if π is a graded Poisson structure on A, then π has a decomposition [Formula presented] where E is the Euler derivation, πunim is the unimodular graded Poisson structure on A corresponding to π, and m is the modular derivation of (A,π). This result is a generalization of the same one in the quadratic setting. The rigidity of graded twisting, PH1-minimality, and H-ozoneness are studied. As an application, we compute the Poisson cohomologies of the quadratic Poisson structures on the polynomial ring of three variables when the potential is irreducible, but not necessarily having an isolated singularity. © 2024 Elsevier B.V., All rights reserved
