Digital Commons Network^™

Influence Of Plasticizer Type On The Structure And Drug Release Characteristics Of Lm-Pectin Hydrogels, Banu Kocaağa, Fatma Seni̇ha Güner

Turkish Journal of Chemistry

This study investigated the effects of different plasticizers—castor oil (CO), polyvinylpyrrolidone (PVP), and polyethylene glycol (PEG) with varying molecular weights (MWs)—on the structure and drug-release performance of low-methoxyl pectin (LM-pectin) hydrogels. Theophylline was used as a model drug to evaluate release behavior under physiologically relevant conditions. The incorporation of plasticizers modulated polymer–polymer interactions, swelling behavior, and thermal properties, thereby affecting drug-release kinetics. CO, a hydrophobic triglyceride, created microdomain-induced diffusion pathways; PVP, containing water-affinitive lactam units, facilitated moisture-driven plasticization; and PEG (MW 400/1000/1500), with hydroxyl-terminated chains, established hydrogen bonds with pectin. Structural analyses (FTIR and DSC) revealed that CO disrupted pectin …

Expression, Purification, And Crystallization Of Recombinant Human Abl-1 Kinase For X-Ray Crystallography, Ayça İrgi̇t, Hali̇li̇brahi̇m Çi̇ftçi̇, Hasan Demi̇rci̇

Turkish Journal of Chemistry

Abelson-1 (ABL-1) is a nonreceptor tyrosine kinase that plays essential roles in various cellular processes, including proliferation, survival, differentiation and its kinase activity is tightly regulated. The dysregulated ABL-1 kinase activity is linked to disease pathogenesis like Chronic Myeloid Leukemia (CML), where the BCR::ABL-1 fusion oncoprotein drives oncogenic signaling. Due to its central role in CML pathogenesis, understanding the structure of ABL-1 is crucial for the effective management of the disease and drug development studies. This study focuses on optimizing the expression, purification and crystallization of the recombinant human ABL-1 kinase domain for its structural analysis via X-ray crystallography and …

Antioxidant Potential Of Sulfenimides In Waste Walnut Oil Biodiesel: Kinetic Stability, Phosphomolybdenum Activity, And Reducing Power Capacity, Nalan Türköz Karakullukçu, Hasan Yakan, Volkan Murat Yilmaz, Hali̇t Muğlu, Semi̇ha Yeni̇gün, Hali̇l Kütük

Turkish Journal of Chemistry

This study investigated the influence of synthetic sulfenimides on biodiesel–diesel fuel blends. Three previously synthesized sulfenimide derivatives were structurally characterized using spectroscopic techniques. We evaluated their antioxidant properties through phosphomolybdenum activity and reducing power capacity assays. The tested fuel samples were designated as D100, B10D90, B10D90_AA (ascorbic acid), B10D90_3, B10D90_2, and B10D90_1. The effect of adding 2000 ppm of the additive was measured using an Oxifast instrument following the ASTM D7545 standard, and the results were compared to those of the chemical antioxidant ascorbic acid. Inhibition time values were derived from the oxidation stability results. The starting temperatures for crystallization …

Investigating The Structure And Bioactivity Of Lanthanum Coordination Compounds, Shantanu Kadam, Bhushan Dhale, Bapu Yamgar, Swaminath Bhattar

Turkish Journal of Chemistry

Lanthanum metal complexes were synthesized using a classical condensation method by reacting lanthanum nitrate salts with a bidentate ligand in a 1:2:1 molar ratio (M:L:L). The formation and structure of the resulting complexes were confirmed through a combination of analytical techniques, including Fourier transformation infrared spectroscopy, thermal gravimetric analysis, X-ray diffraction, elemental microanalysis, and scanning electron microscopy. The lanthanum complexes synthesized exhibited strong in vitro antimicrobial activity. Antibacterial screening showed inhibition zones of 18–26 mm against Staphylococcus aureus and Escherichia coli, surpassing those of the reference drug ciprofloxacin (16–20 mm). Antifungal studies demonstrated inhibition zones of 15–23 mm against Candida …

Comparative Computational Study Of Sulfur-Donor Additives For Stabilization Of Fapbi3 Perovskites, Ilnar Nurgaliev, Akbarxon Hamzayev, Murad Marasulov, Zavkiddin Julliev, Akhmad Oblakulov, Nigmat Ashurov

Turkish Journal of Chemistry

A multiscale computational investigation integrating density functional theory (DFT) and molecular dynamics (MD) simulations was conducted to elucidate the mechanisms through which sulfur-containing donor molecules stabilize the photoactive α-phase of formamidinium lead iodide (FAPbI3) perovskites. The binding energetics, charge-transfer behavior, and hydrogen-bonding interactions of thiourea (TU), thiosemicarbazide (TSC), thiocyanate (SCN–), and diethyldithiocarbamate (DTC) were systematically analyzed. DFT results revealed pronounced Pb–S coordination and multidentate hydrogenbonding, with binding energies following the trend SCN–>TSC>DTC>TU. Thermodynamic analysis demonstrated that these additives lower the Gibbs free energy difference, thereby stabilizing the black α-phase, with TSC, TU, and to a lesser extent …

Zoledronic Acid-Loaded Hap–Sio2–Camoo4:Eu3+ With Luminescent Properties As A Novel Drug Delivery System, Emi̇ne Kutlu, Muhammad Asim Ali, Fati̇h Mehmet Emen, Canan Vejselova Sezer, Hati̇ce Mehtap Kutlu

Turkish Journal of Chemistry

CaMoO4:Eu3+-functionalized hydroxyapatite–silica (HAp–SiO2–CaMoO4:Eu3+) core–shell nanocomposites were synthesized for the first time and evaluated as a multifunctional drug delivery and imaging platform. HAp–SiO2 nanocomposites were prepared via a hydrothermal route and subsequently functionalized with a luminescent CaMoO4:Eu3+ shell using the Pechini sol–gel method. Structural analyses confirmed the successful coexistence of HAp, SiO2, and CaMoO4:Eu3+ phases, while electron microscopy revealed spherical core–shell morphologies. Dynamic light scattering measurements showed average hydrodynamic particle sizes of approximately 1085 nm for HAp–SiO2 and 1427 nm for HAp–SiO2–CaMoO4:Eu3+ nanocomposites, indicating particle clustering in aqueous media, which is consistent with the low surface charge of the particles. The …

Development And Optimization Of A Novel Spectroscopic Method To Monitor Crystallization Behavior Of Bcs-Ii Drug, Uditi Handa, Anuj Malik, Kumar Guarve

Turkish Journal of Chemistry

This study investigated the crystallization behavior of dextromethorphan hydrobromide, a class II drug, to improve understanding of its supersaturation potential and formulation design. Conventional methods often lack the sensitivity or scalability needed for accurate detection of early nucleation events. To overcome these limitations, a novel process tracks real-time absorbance below turbidity levels to detect early molecular aggregation and phase separation. Crystallization kinetics of the drug was assessed at concentrations of 0.1, 0.2, and 0.3 mg/mL using three analytical techniques, namely, isothermal crystallization (baseline), ultraviolet (UV) absorbance (turbidity monitoring, UV-TM), and an optimized UV absorbance graphical method (UV-GM) (novel process). Induction …

Efficient Electrocatalytic Activity Of A Fe-Mof Based Cathode Catalyst In Pemfcs, Susmita Singh, Tanya Nishad, Debasmita Paul, Sumi Ganguly, Soumyabrata Goswami

Turkish Journal of Chemistry

Advancements in cost-effective and efficient alternative energy sources are critical for socioeconomic development. In this study, Iron-based metal–organic framework (Fe-MOF) electrocatalyst was fabricated using an Fe salt and ligand. Several surface characterization methods, including Fourier Transform-Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), and X-ray diffraction (XRD), were used to characterize the electrocatalyst. Additionally, using Chronoamperometry (CA), Electrochemical Impedance Spectroscopy (EIS), Linear Sweep Voltammetry (LSV), and Cyclic Voltammetry (CV), the electrocatalytic behaviour in a cathodic reaction in PEMFCs is investigated. The study showed the material’s exceptional chemical or surface stability, and great surface morphology of the material that facilitated the cathodic …

Effectiveness Of A Network Open House Model To Recruit Trainees To Post-Baccalaureate Stem Programs, Sarah Mordan-Mccombs, Scott Takeo Aoki, Lindsay Lewellyn, Sarah Justice, Neetu Tewari, Jorge Cantu, Robert Seiser, Ahmed Lakhani, Jennifer R. Kowalski

Biology Faculty publications

Post-baccalaureate (post-bac) programs can be instrumental in strengthening science training and expanding STEM career opportunities for junior trainees. Many of these sponsored programs are designed to increase research exposure for underrepresented minorities, including African American, Hispanic, Native American, and first-generation college students, among others. Recruiting trainees to post-bac programs can be challenging for reasons including a lack of awareness about available programs. To address this gap, an Open House event was created with the goal of raising awareness and generating interest among potential students for future post-bac programs. Students were recruited from partnering Minority Serving Institutions (MSIs) to attend a …

Development Potential Of The Ucg-Eg Industry In Guizhou Province, China, Wang Lingxia, Zhou Ze, Yi Tongsheng, Qin Yong, Yang Lei, Kong Weimin

Coal Geology & Exploration

Objective and Methods This study aims to promote the sustainable development of the underground coal gasification (UCG) industry and to extend the industrial chain of syngas development and utilization. To this end, this study analyzed the UCG-electricity generation (UCG-EG) potential of Guizhou Province based on the evaluation results of resources allowing UCG and the current status of energy and electric power structures of this province. A 3D analytical principle model for UCG-EG industry scenarios in Guizhou was constructed through scenario modelling. Using this model, the prospects of the UCG industry under low, medium, high, and ultra-high scenarios were quantitatively depicted. …

Factors Influencing Productivity And Production System Optimization For Deep Coalbed Methane In The Daning-Jixian Block, Ordos Basin, Zhao Haifeng, Jia Zhaojie, Chen Mengqi, Yang Ziyi, Wang Bin, Lin Hongliang, Yang Yanfeng

Coal Geology & Exploration

Objective Deep coalbed methane (CBM) reservoirs are characterized by ultra-low porosity, ultra-low permeability, and super saturation, rendering it impractical to copy the productivity models of shallow coalbed methane and shale gas. Furthermore, the production performance of deep CBM varies significantly across different well sections. However, the impacts of different factors on the productivity of deep CBM remain poorly understood. This study conducted a numerical simulation analysis of the productivity of deep CBM in the Daning-Jixian block along the eastern margin of the Ordos Basin based on the geological characteristics of the block, aiming to explore the impacts of various key …

Influence Mechanisms Of Cleats On Hydraulic Fracture Propagation In Deep Coalbed Methane Reservoirs, Wang Haiyang, Lu Chen, Su Xu, Wang Yufei, Zhou Desheng

Coal Geology & Exploration

Objective Creating large-scale fracture networks through hydraulic fracturing serves as an important approach to the commercial development of deep coalbed methane (CBM) reservoirs. However, these reservoirs contain extensively developed cleats. The significantly different cementation strengths of cleat fillings lead to complex interactions between cemented cleats and major hydraulic fractures during fracture propagation. Therefore, clarifying the mechanisms underlying the influence of cemented cleats on hydraulic fracture propagation is critical to improving the simulation effects of deep CBM reservoirs. Methods Using particle flow code (PFC) discrete element method, combined with quasi-triaxial mechanical test results of the No.8 coal seam within the Yichuan …

Seepage Dynamics And Damage Characteristics Of Shaft Lining Concrete Under Hydraulic Coupling, Xue Weipei, Zhou Yaya, Cheng Hua, Yao Zhishu, Rong Chuanxin, Wang Zhongjian, Wu Hao

Coal Geology & Exploration

Objective Concrete serves as a lining material for support structures used in vertical shafts in coal mines, and its seepage performance and mechanical characteristics play a crucial role in ensuring structural safety. Furthermore, shaft lining concrete is placed under the groundwater level, subjected to a stress environment significantly different from that of surface concrete.Methods To investigate the impacts of groundwater seepage on the performance of shaft lining concrete under triaxial stress conditions, hydraulic coupling tests were conducted using a servo pressure testing machine equipped with a seepage apparatus, yielding data on permeability, elastic volumetric strain, crack volumetric strain, and …

Evolutionary Mechanisms And Control Strategies For Surrounding Rock Stability Of Inclined Shafts Under Groundwater Seepage, Zhang Cun, Zhao Xiangyu, Chen Yanhong, Ren Zhaopeng, Wu Runze

Coal Geology & Exploration

Background The western coal mining area has emerged as China’s primary coal production base. In this area, multiple ten-million-ton-scale coal mines are constructed using inclined shafts. Since inclined shafts run through multiple aquifers, many of them are subjected to shaft wall rupture and water inrushes to varying degrees.Methods This study aims to determine the impacts of groundwater seepage on the surrounding rock stability of inclined shafts. Using field survey, theoretical analysis, and numerical simulation, this study investigated the shaft wall stability of the main inclined shaft in water-rich sections in the Xiaojihan Coal Mine.Results and Conclusions Theoretical analysis …

Surface-Borehole Resistivity Tomography For Seepage Detection In Earth-Rock Dams, Tan Lei, Hu Xiongwu, Zhang Pingsong, Jiang Xiaoyi, Dong Ya, Liu Fuda, Li Chunyang, Xu Hu

Coal Geology & Exploration

Objective Resistivity methods allow for effective detection of seepage in reservoir dams. However, when used to detect the hidden hazards of dams, the surface resistivity method fails to accurately identify vulnerable areas across an entire dam due to blind spots near both dam abutments and insufficient resolutions for deep parts. Methods This study proposed a seepage detection technique for earth-rock dams based on surface-borehole resistivity tomography, followed by the analysis of the distribution of surface-borehole resistivity under the lateral and vertical variations in a seepage zone through numerical simulations. This technique was applied to the Shibi reservoir dam. Using the …

Week 8: Weaponizing Space? Cooperation And Challenges To Arms Control, Alice Dell'era

Course Materials

This lecture examines the potential risks and consequences of weaponizing space, assesses the potential for conflict in space, and examines how international cooperation and arms control mechanisms can prevent the weaponization of outer space.

2026 February 25 - Undergraduate Curriculum Council Minutes, Undergraduate Curriculum Council, East Tennessee State University

Undergraduate Curriculum Council Minutes

No abstract provided.

Factors Associated With Substance Use Treatment Seeking During Covid-19: A Cross-Sectional Study Applying The Gelberg–Andersen Model For Vulnerable Populations, Dorothy Wallis

Social Work Faculty Publications

Treatment seeking among individuals who misuse substances can be a complex process, with many factors contributing to treatment seeking. Guided by Gelberg–Andersen’s Behavioral Model for Vulnerable Populations, this research seeks to establish predisposing, enabling, and need factors contributing to treatment seeking during COVID-19. A total of 201 individuals participated in the study. Contrary to existing literature, no predisposing factors were associated with treatment seeking during COVID-19. However, variations were seen in enabling and need factors. Perceiving a need for treatment and having reliable transportation to treatment were associated with treatment seeking during COVID-19, underlying the importance of addressing both physical …

Supporting Evidence-Based Responses To Emotional Needs In Emphysema (Serene): Protocol For A Randomized, Open-Label Mechanistic Trial Comparing Coping Skills Training And Disease-Specific Education For Depressive Symptoms Conducted In United States Health Systems, Joanna L. Hart, Daniel Carter, Chloe Hinton, James Grilli, Lily A. Brown, Nora Brier, Yingying Lu, Casey Whitman, Michael O. Harhay, Michael Sims, Carmen Alvarez, Lisa R. Miller-Matero, C. Virginia O'Hayer

Department of Psychiatry and Human Behavior Faculty Papers

BACKGROUND: Depressive symptoms and anxiety are highly prevalent among people with chronic obstructive pulmonary disease (COPD), strongly associated with poor outcomes, and rarely recognized or treated. Integrating families into interventions may amplify supportive care treatment effects and overcome common challenges, yet this strategy is understudied. The Supporting Evidence-based Responses to Emotional Needs in Emphysema (SERENE) trial's main objective is to identify the mechanisms through which a family-partnered Coping Skills Training (CST) reduces depressive symptoms among patients with COPD, testing five putative mechanisms: family relationship quality, patient and caregiver self-efficacy, patient loneliness, and caregiver psychological distress.

METHODS: SERENE will enroll 375 …

The Student Movement Volume 110 Issue 15: Entering A New Movement, Aiko J. Ayala Rios, Joey Carrion, Lia Glass, Audrey Lim, Gersh William, Megan Constantine, Jj Nixon, Anna Pak, Caleb Chung, Kyle Simpson, Anna Rybachek, Alyssa Caruthers

The Student Movement V. 110 (2025-2026)

ARTS & ENTERTAINMENT

Nature Chases the Blues Away: University Choirs' Winter Concert, Aiko J. Ayala Rios

Review of Apple TV's "Pluribus", Joey Carrion

Second Screen Viewing, Lia Glass

Meet Your Winter Olympic Influencers, Audrey Lim

HUMANS

Black History Month: Impact Vespers Spotlight, Gersh William

A Hidden Gem on Campus: Discover the AU Farm, Megan Constantine

Karis Wants to Know How You Get Your News, JJ Nixon

Senior Spotlight: Krystal Yoo, Anna Pak

NEWS

The Voice of the Students, Caleb Chung

Skywatch Awes Visitors With High-Res Astronomical Sights, Kyle Simpson

IDEAS

21st-Century Gossip: Social Media Confession Pages, Aiko J. Ayala Rios …

Examining The Impact Of Young Children’S Motor Development On Inhibitory Control And Social Skills, Ali S. Brian, Shea E. Ferguson, Angie Starrett, Emily Kallis, J. Ross Ramsey

Faculty Publications

Background/Objectives: Understanding how motor and cognitive development may contribute to prosocial behavior is essential for supporting whole-child development in early learning settings. Early childhood education settings are well-positioned to address these concerns through integrated approaches that support the whole child. Research exploring the mechanisms that link developmental domains remains limited, especially regarding how motor development may influence social outcomes through cognitive processes such as inhibitory control. Thus, the purpose of this study was to examine whether gains in motor skills were associated with prosocial behaviors indirectly through improvements in inhibitory control. Methods: Preschoolers (N = 238; Mage = 66.61, SD …

Black Women’S Critical And Racial Literacy Practices In Higher Education, Cherita Harrell

Walden Dissertations and Doctoral Studies

The problem addressed through this study was the limited understanding of how Black female college students experienced critical and racial literacy practices within college-level reading and writing courses, particularly within dominant literacy frameworks that privileged White, Eurocentric norms of language, knowledge, expression, and representation. Grounded in Luke’s critical literacy and Sealey-Ruiz’s racial literacy frameworks, the purpose of this qualitative study was to examine how Black female college students described their experiences in reading and writing courses, including how dominant literacy frameworks influenced their engagement in ways that limited expression, created barriers to participation, and shaped their academic experiences and personal …

The Lumberjack, February 25, 2026

Cal Poly Humboldt's Student Newspaper

The student newspaper of Humboldt State University.

The College Voice, Vol. 63, No. 7 [February 25, 2026], Connecticut College

2025-2026

No abstract provided.

The Bg News February 25, 2026, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. February 25, 2026. Volume 105-Issue 19.

Individualizing Social-Emotional Learning For Infants And Toddlers With Special Needs, Charlotte Marie Quiñones

Theses and Dissertations

Infants and toddlers develop socially and emotionally at different rates, and children with special needs face added challenges that require intentional support. Social-emotional learning (SEL) in the earliest years builds the foundation for school readiness, relationships, and lifelong success. This qualitative case study explored how infant and toddler teachers individualize SEL for children with special needs in one inclusive, culturally diverse early childhood program. Four teachers participated through semi-structured interviews, classroom observations, and a focus group. Program documents and lesson plans supplemented the data. Guided by the SEFEL framework, double-loop learning, and culturally responsive pedagogy, the study found that teachers …

Reconstructing Soil Conductivity Profiles From Electromagnetic Induction Data, Tyler Philip Casas

Theses and Dissertations

Construction of infrastructure in cold regions poses a significant challenge, particularly due to permafrost degradation, which can lead to significant structural damage and deterioration to facilities and transportation systems. In recent years, the issue of geophysical hazard detection has been instrumental in minimizing ground subsidence risks when con- structing infrastructure in cold regions. As a commonly used technology for geophysical applications, electromagnetic induction (EMI) can be used for (i) detecting ground subsurface layers and (ii) characterizing soil types via electrical conductivities. However, EMI technology tends to struggle with lower resolution at lower frequencies and shallow depth of penetration at higher …

Inside The System, Outside The Circle: A Parent-Educator’S Journey Of Navigating Through Systemic Oppression While Advocating For Her Son With A Learning Disability, Sanora L. White

USF Tampa Graduate Theses and Dissertations

This autoethnographic study examines how I, as a Black parent-educator, navigated racialized and ableist educational systems while advocating for my child with a learning disability. Grounded in Disability Studies in Education, DisCrit, Critical Pedagogy, Universal Design for Learning, and Black Feminist Thought, the study explores how systemic inequities shape parent–teacher collaboration and how advocacy functions as relational care and resistance. The guiding research question asked how I experienced and navigated collaboration within racialized and ableist special education systems. Data sources included reflective journals, IEP documents, personal narratives, and dialogic conversations with critical friends. Using composite narratives and thematic analysis, the …

The Lived Experiences Of Visually Impaired Professionals, Robert Anthony Hoyt

Walden Dissertations and Doctoral Studies

This qualitative phenomenological study explored the lived experiences of visually impaired professionals (VIPs) as they navigate workplace inclusion, identity, and systemic accessibility. Drawing on Giorgi’s descriptive phenomenological psychological method, the study analyzed in-depth interviews with eleven purposefully selected participants across diverse professions. The research aimed to address a gap in disability studies by centering on the psychological meanings embedded in the narratives of VIPs; voices that are often underrepresented in organizational research. Through rigorous thematic analysis, three essential themes emerged: (1) the silent erasure of competence, reflecting the emotional labor required to assert professional legitimacy in ableist environments; (2) resilience …

Barriers And Incentives For Smartphone Mhealth Adoption Among Health Care Providers In Central And Southern Appalachia, Temitope S. Ajagbe

Walden Dissertations and Doctoral Studies

Rural Appalachian communities in the United States experience disproportionately high chronic disease burden. Mobile health (mHealth) technology adoption among providers remains low despite potential to improve care access. Understanding adoption factors is critical for addressing health inequities. The purpose of this quantitative cross-sectional study was to examine whether diffusion of innovations (DOI) theory attributes predict current mHealth adoption among health care professionals involved in rural Appalachian primary care delivery and whether structural constraints moderate these relationships. Despite extensive DOI validation in well-resourced settings, its applicability to severely resource-constrained contexts remained empirically uncertain. Data from 100 health care professionals across eight …