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Graphene Aerogels: Part 1 - Derived From Graphene Oxide And Thermally Reduced Graphene Oxide Via Supercritical Carbon Dioxide Drying, Meryem Samanci, Ayşe Bayrakçeken

Turkish Journal of Chemistry

Graphene aerogels have become promising materials in many areas of industry, especially in energy applications due to their superior physical and electrochemical properties. Generally, graphene oxide (GO)-derived aerogels (A) are synthesized by using the hydrothermal method. In this study, both GO and reduced graphene oxide (RGO)-derived aerogels were synthesized by using the sol-gel method coupled with the supercritical carbon dioxide (SCCO2) drying process. It aims to examine the changes in the structure of the final aerogel by changing the amount (0.25–0.5–1% wt.) and type of graphene-based precursor materials used in the synthesis. Physical characterizations of graphene aerogels were conducted using …

Computational Drug Repurposing Effort For Identifying Novel Hits For The Treatment Of Diseases Such As Endometriosis, Uterine Fibroids, And Prostate Cancer, Ahmet Buğra Ortaakarsu, Hi̇lal Medetali̇beyoğlu

Turkish Journal of Chemistry

This research aimed to identify potential drug compounds from the ZINC15 molecule database that could effectively treat GnRH1R-related diseases. The study utilized molecular docking and molecular dynamics methods to achieve this goal, which is crucial in drug repurposing research. The virtual screening process involved analyzing known drug compounds using molecular docking. Additionally, molecular dynamics simulations and MM-GBSA were employed to evaluate the stability of the complexes and determine the interactions between the compounds and protein structure. As a result, this study provides significant insights for treating diseases such as endometriosis, uterine fibroids, and prostate cancer related to GnRH1R. The study …

Hummers’ Method-Assisted Liquid-Phase Exfoliation Enables The Fabrication Of Few-Layer Borophene From Bulk Boron, Mehmet Semih Bingöl, Mehmet Yilmaz, Ahmet Emre Kasapoğlu

Turkish Journal of Chemistry

The fabrication of few-layer borophene (BP) from bulk boron (b-B) is of great importance and still a scientific challenge due to the complex structure and crystallinity of b-B. Herein, we propose a novel technique to prepare a few-layer BP on a large scale with a large lateral size in a well-controlled manner. For this, we employed the Hummers’ method-assisted liquid-phase exfoliation. In the first step, the chemical exfoliation of the b-B as a precursor was performed by the modified Hummers’ method. After chemical exfoliation, mechanical delamination was employed by using an immersion sonicator. Finally, BP sheets were collected with dimensions …

Supramolecular Solvent-Based-Vortex-Assisted-Dispersive Liquid Liquid Microextraction Of Sudan Black B In Food Samples Prior To Spectrophotometric Detection, Fi̇gen Erek, Mustafa Tüzen

Turkish Journal of Chemistry

A new, simple and rapid spectrophotometric method was developed for determination of Sudan Black B in food products by supramolecular solvent-based-vortex-assisted-dispersive liquid liquid microextraction (SUPRAS-VA-DLLME). Extraction solvent type, volume of solvent, pH, volume of THF, centrifugation time, vortex time, and sample volume were investigated as optimization parameters of the developed method. Under the optimum conditions, limit of detection and limit of quantification, preconcentration factor and enhancement factor of the developed method were calculated to be 9.01 µg L–1, 29.73 µg L–1, 20, and 55, respectively. The developed microextraction method was successfully applied to food samples for the determination of Sudan …

Graphene Aerogels: Part 2 - Derived From Commercial Graphene And Chemically Reduced Graphene Oxide Via Supercritical Carbon Dioxide Drying, Meryem Samanci, Ayşe Bayrakçeken

Turkish Journal of Chemistry

Graphene aerogels (GAs), the most important class of carbonaceous aerogels, have attracted attention of many researchers due to their superior physical and chemical properties. In this study, commercial graphene (GR) and chemically reduced graphene oxide (RGO) were used as graphene-based precursor materials, unlike graphene oxide (GO), which is widely used in the literature in GA synthesis. GAs were synthesized using the sol-gel technique and dried with supercritical carbon dioxide (SCCO2). In addition, graphene-based materials were used in different ratios and their distribution in the aerogel matrix and its effect on surface properties were investigated. In addition, the synthesized GAs were …

Evaluation Of P(Hema-Co-Nipam) Hydrogels For Removal Of Methylene Blue From Aqueous Solution:Isotherm, Kinetic, And Thermodynamic Studies, Hayri̇ye Mi̇ne Antep, Müni̇re Nalan Demi̇r, Cevher Gündoğdu Hizliateş, Si̇mge Öztürk, Eli̇f Esen

Turkish Journal of Chemistry

In this study, a novel adsorbent material, poly (2-hydroxyethyl methacrylate-co-N-isopropyl acrylamide) (p(HEMA-co-NIPAM) hydrogel, was synthesized for the purpose of removing methylene blue (MB) from aqueous media. The synthesis of hydrogel was carefully conducted, and its properties were thoroughly examined using techniques such as Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The adsorption experiments conducted revealed a remarkable affinity of p(HEMA-co-NIPAM) hydrogel towards MB. The highest adsorption was observed when 0.05 g of the adsorbent were utilized, with optimal conditions at a pH of 6.0 and a temperature of 15 °C. This underscores the importance of …

Investigation Of Benzoic Acid And Sorbic Acid Concentrations In Tomato Paste, Pepper Paste, Ketchup, Mayonnaise, And Barbeque Sauce Samples By Headspace Gas Chromatography-Mass Spectrometry, Orhan Destanoğlu

Turkish Journal of Chemistry

In this study, it was aimed at investigating benzoic acid (BA) and sorbic acid (SoA) concentrations in tomato paste, pepper paste, ketchup, mayonnaise, and barbeque sauce samples by a validated static headspace gas chromatography–mass spectrometry (GC-MS) method. Salicylic acid (SalA) was used as internal standard and the measurements were conducted in the wide linear concentration ranges of BA and SoA which were 2.5–5000 and 12.5–5000, respectively. The limit of detections (LODs) were determined to be 1.5 and 4.5 mg/kg while the limit of quantifications (LOQs) were 2.5 and 12.5 mg/kg for BA and SoA, respectively. The average recovery% values of …

Construction Of Hyperbranched Imprinted Nanomaterials For Selective Adsorption Of Cadmium (Ii), Sheng Nan Hu, Xinyu Zhang, Ming Guo, Shengchun Wu, Wenjun Lu

Turkish Journal of Chemistry

A hyperbranched ion-imprinted polymer (IIP) material containing multiple selective adsorption sites was synthesized using halloysite nanotubes, methyl acrylate, and ethylenediamine in the presence of a template ion [i.e. Cd (II) heavy metal]. The successful preparation of the Cd-IIP composition was confirmed by FT-IR, XRD, TEM, TGA, and elemental analysis. The polymers exhibited good adsorption of Cd (II) with a maximum adsorption capacity of 64.37 mg·g–1. The imprinting factor (α) for Cd (II) was 2.62 and the selection factor (β) was 1.78, indicating a specific adsorption of Cd (II) ion. The selection coefficients of Cd-IIP for Cd (II)/Pb (II), Cd (II)/Cu …

Transdermal Delivery System To Release Phthalocyanine Photosensitizers For The Potential Treatment Of Skin Cancer With Pdt, Meryem Çamur Demi̇r, Fatma Kurşun Baysak, Caner Yahya Boyar, Ali̇han Toksoy, Fati̇h Algi

Turkish Journal of Chemistry

This research aims to examine the transdermal release of water-soluble indium and zinc metallo phthalocyanine (InPc and ZnPc) compounds from the poly(vinyl alcohol) (PVA) membrane and the cytotoxicity effect of these Pcs on normal mouse fibroblasts (L929 fibroblast) and human melanoma (SK-MEL-30) cells. For this purpose, the effects of temperature, pH, drug concentration and membrane thickness on transdermal release were investigated in order to obtain the optimum transdermal release profile by preparing PVA membranes with different thicknesses and crosslinked by heat treatment. Optimum drug release was found to be 85.36% using 6 µm thick PVA membrane at 37 ± 0.5 …

Preparation Of Cholesterol-Imprinted Polymer For Selective Adsorption Of Cholesterol From Gastrointestinal Mimicking Solution, Veyi̇s Karakoç, Erol Erçağ

Turkish Journal of Chemistry

The purpose of this study is to synthesize a highly selective adsorbent to remove cholesterol, one of the most important causes of cardiovascular diseases, from the intestinal mimic solution (IMS). For this purpose, cholesterol imprinted polymers were synthesized by suspension polymerization method using the molecular imprinting technique. In the first step, the functional monomer MATyr with hydrophobic character was synthesized. Then, the cholesterol-MATyr monomer precomplex was formed and the polymerization process was carried out by adding cross-linkers with the comonomer HEMA. The synthesized polymer poly(2-hydroxyethyl methacrylate-N-methacryloyl-(L)-tyrosine methylester) poly(HEMA–MATyr) was characterized by FTIR and SEM. The cholesterol adsorbing behavior of the …

Jtc 24: From Adversity To Achievement, Heather Shirley

University of Mississippi News

This story is part of the 2024 Journey to Commencement series, which celebrates the pinnacle of the academic year by highlighting University of Mississippi students and their outstanding academic and personal journeys from college student to college graduate.

Preliminarily Exploring The Theories And Technologies For Coalbed Methane Production Using Horizontal Wells: Comparison Of Conditions For Coalbed Methane And Shale Gas Exploitation, Wang Hongyan, Duan Yaoyao, Liu Honglin, Zhao Qun, Chen Shangbin, Lu Haibing, Shi Zhensheng, Sun Qinping, Chen Zhenhong, Zhou Shangwen, Yang Mingwei, Wang Cong

Coal Geology & Exploration

Through 30 years of unremitting explorations, coalbed methane (CBM) wells in China have gradually transitioned from vertical to horizontal wells. However, the lack of basic theories on CBM production using horizontal wells is the main challenge to current CBM development. Compared to shales, coal seams exhibit heterogeneity and a minor presence of foliations and brittle minerals, hindering the formation of volumetric fracture networks. Nevertheless, the roofs and floors of coal seams have high sealing capacities and mechanical strength, creating excellent conditions for hydraulic fracturing. Some fractures in coals are filled with calcite, rendering acidification conducive to the improvement of reservoir …

Accumulation Characteristics And Exploration Prospects Of Deep Coalbed Methane In The Longtan Formation Of The Nanchuan Block On The Southeastern Margin Of The Sichuan Basin, Guo Tao, Jin Xiaobo, Wu Didi, Xie Fei, Liu Jinxian

Coal Geology & Exploration

Vertical well Y2 in the Nanchuan bloc on the southeastern margin of the Sichuan Basin has yielded daily production of natural flowing gas of 13000 m³, signifying a strategic breakthrough in deep coalbed methane (CBM) exploration on the margin. This study aims to systematically reveal the enrichment and high-yield patterns of CBM in the Nanchuan block. Using data on the regional geology, tests, assays, and production, this study investigated the accumulation characteristic and conducted exploration potential evaluation for deep CBM in the Nanchuan block from the perspective of the quality, pore and fissure characteristics, gas content, and fracability …

Experimental Study Of The Thermal Cracking Mechanism Of Limestones During Burning, Zhang Weiqiang, Cao Zhicheng, Zhou Qizhong, Wang Zuoquan, Wu Yun

Coal Geology & Exploration

Spontaneous combustion of coal seams will cause different degrees of structural damage to surrounding rocks at different high temperatures, significantly altering their physical and mechanical properties and engineering geological effects. To delve into the structural evolution patterns of rocks during burning, this study investigated the limestones from the floor of a coal mine in Xuzhou. It conducted thermal cracking experiments under different temperatures, exploring the thermal cracking patterns of rocks on multiple scales. Furthermore, this study revealed the genetic mechanism of thermal cracking by combining numerical simulations and microstructure tests. Key findings are as follows: (1) The thermal cracking temperature …

College Of Liberal Arts Annual Awards Ceremony, 2024, Lee Cohen, University Of Mississippi. College Of Liberal Arts

Liberal Arts Awards

The College of Liberal Arts presented awards to its faculty, staff, students, and alumni in the Gertrude C. Ford Center Student Union Ballroom.

2024-April-25-P3 Honored For National Military Appreciation Month, Bill Gatton College Of Pharmacy, East Tennessee State University, University Marketing And Communication, East Tennessee State University

ETSU News

JOHNSON CITY, Tenn. (April 25, 2024) —As a currently enlisted serviceman and full-time student pharmacist, Jimmy Owens is no stranger to managing his time in the most efficient way possible. In the event he is deployed into active duty, he has to be ready; but he also has to be prepared for that next pharmacology exam.
 
“It's a lot of preparing for the weekend and then making up for the weekend at the same time,” said Owens, who is from Lewisburg, Tennessee. “It is difficult to do. But thanks to the military, I think I have the discipline to do …

The Impact Of Telemedicine On Human Immunodeficiency Virus (Hiv)-Related Clinical Outcomes During The Covid-19 Pandemic, Avery Lin Cox, Daniel Tsang, Lisa A. Spacek, Constantine Daskalakis, Dagan Coppock

Division of Infectious Diseases and Environmental Medicine Faculty Papers

The coronavirus disease of 2019 (COVID-19) pandemic exacerbated barriers to care for people living with human immunodeficiency virus (HIV) (PLWH). The quick uptake of telemedicine in the outpatient setting provided promise for care continuity. In this study, we compared appointment and laboratory no-show rates in an urban outpatient HIV clinic during three time periods: (1) Pre-COVID-19: 9/15/2019-3/14/2020 (predominately in-person), (2) "Early" COVID-19: 3/15/2020-9/14/2020 (predominately telemedicine), and (3) "Later" COVID-19: 9/15/2020-3/14/2021 (mixed in-person/telemedicine). Multivariable logistic regression models evaluated the two study hypotheses: (i) equivalence of Period 2 with Period 1 and of Period 3 with Period 1 and (ii) improved outcomes …

Sleep It Off? Exploring Sleep Duration And Bedtime Regularity As Potential Protective Moderators Of Early Adversity's Impact On Mental Health In Infancy, Childhood, And Adolescence, Sarah Lindsey Hipwell Kamhout

Theses and Dissertations

Introduction: Adverse Childhood Experiences (ACEs) are known to increase risk of mental health challenges throughout development, and sleep is known to decrease risk of mental health challenges. These have not been studied in tandem in younger cohorts. We investigated whether interactions between sleep duration and sleep regularity would moderate the impact of ACE exposure on risk for the development of mental health disorders. Methods: We conducted secondary cross-sectional analyses on the 2020-2021 waves of the National Survey of Children's Health (NSCH) (n = 92,669). We used logistic and ordinal regression to replicate known main effects of ACEs (total, household, community, …

Songs And Flowers Of The Wasatch: Rhetorical Aesthetics And Latter-Day Saint Women's Poetry, Jolyn D. Brown

Theses and Dissertations

Although the literary quality of women's poetry from the nineteenth century has long been criticized by literary scholars, recent work in reception studies has documented readers' aesthetic experiences with such poetry in order to appreciate its popularity and appeal (Stauffer). Extending this work in literary reception studies, I draw on scholarship in rhetorical studies, specifically rhetorical aesthetics (Clark), to demonstrate how conventional poetic forms and sentimental appeals can be used by marginalized communities to facilitate identification. I examine Songs and Flowers of the Wasatch, a collection of primarily Latter-day Saint women's poetry compiled by Emmaline B. Wells for the 1893 …

Information Literacy In First Year Writing: A Case Study In Instruction, Rebekah A. Jakeman

Theses and Dissertations

With the emergence of the digital age, and the convenience of producing, accessing, and disseminating information, information literacy (IL) has become a prominent topic in higher education, especially in First-Year Writing (FYW) classrooms. Although much research exists about students' struggle to acquire IL dispositions and practices, there is less scholarship about teachers' attitudes towards IL and how they implement IL concepts in the classroom. Rise Smith proposes that to ensure students master IL skills, higher education must ensure that instructors understand, value and apply IL in their teaching. Therefore, my study focuses on instructors' self-efficacy surrounding IL and how it …

Type 2 Diabetes And Marital Quality Declines Moderated By Positive Health Behaviors, Rebekah Case Fankhauser

Theses and Dissertations

Type 2 diabetes affects more than one-quarter of older adults in the United States. Many older adults manage type 2 diabetes (T2D) in the context of marriage, although few studies have acknowledged the effect the illness has on marital quality. The current study examined how the presence of T2D in later life relates to marital quality, and how positive health behaviors--diet, physical activity, and sleep--can moderate the relationship between T2D and marital quality. Data from the 1,200 married older adults in the Life and Family Legacies study were used to estimate moderation models using structural equation modeling in Mplus. Results …

Perceptions Of Tesol Instruction From Varying Feedback Sources, Kylie J. Woffinden

Theses and Dissertations

Many studies in the field of preservice TESOL teacher education focus on expert teacher feedback to preservice teachers but neglect to address other sources of classroom feedback. This study explored how alternate sources of classroom feedback, including peer teachers and students, compare to expert feedback. A total of thirty participants from three different participant groups were featured. The three participant groups were composed of students studying at an intensive English lab school, preservice teachers who worked at the lab school, and the mentors and university instructors that guided those preservice teachers. Data collection took place through feedback sessions, during which …

Ryan Greer, Junior Recital

Bailey School of Music Concert Programs

Ryan Greer, Junior Recital

Gambling On Housing: Is Adverse Possession A Valid Tool For The Reallocation Of Vacant Property?, Kelsey Dunn

Texas A&M Journal of Property Law

Adverse possession, a staple of first-year law school property classes, never fails to shock the conscience of unsuspecting law students. Some are surprised to learn that a squatter can acquire legal title to another person’s property by moving in and using it for a period of years. In recent years, housing activists have begun to view the doctrine as an outside-the-box solution to our nation’s housing crisis. There are dozens of vacant homes for every person experiencing homelessness in America. Why not give those properties to people who actually use them?

However, this well-intended impulse does not square with reality. …

Royalty Wars: The Dark Side To Raising The Minimum Royalty Rate For Oil And Gas Leasing On Federal Land, Audrey A. Helm

Texas A&M Journal of Property Law

In 2022, the Inflation Reduction Act took marked steps toward changing the course of the oil and gas industry for the first time in over 100 years, requiring that all federal oil and gas leases issued for the following decade have a minimum royalty rate of 16.67%. This paved the way for a major adjustment in the oil and gas industry, which has seen a 12.5% minimum royalty for the past century. In 2023, the Department of the Interior proposed to permanently codify these changes, citing purposes of ensuring a fair return to taxpayers and protecting the environment.

This Article …

Addressing The Physical Demands Of Caregiving Or Children With Disabilities In Nicaragua: A Quality Improvement Collaboration With Fne International, Grace Price

Entry-Level Occupational Therapy Doctorate - Doctoral Capstone Symposium

Many caregivers of children with disabilities experience chronic pain and related symptoms of cumulative physical trauma. This type of phenomenon is particularly prevalent in developing, low-income countries where environmental accommodations may not be as accessible. A quality improvement program, was conducted as a doctoral capstone project to create resources addressing the physical needs of caregivers of children with disabilities in Nicaragua. Program participants included teachers at a school for children with disabilities and special needs in Nicaragua. The primary project deliverable consisted of conducting an in-person workshop to train the teachers with evidence-based methods for preventing chronic pain and other …

Interpreting Text Messages, Emma Smith, Catherine Bohn-Gettler

Celebrating Scholarship and Creativity Day (2018-)

In today’s modern age, texting and other forms of virtual communication are extremely prevalent, but still not completely understood. The goal of this study is to examine how a reader’s emotional state interacts with text message features to influence perceptions of sarcasm. This study includes different versions of text messages that can be perceived as negative or positive. Additionally, there are different sets of text messages that end with either an emoji (😉), an ellipsis (...), or a period (.). Findings from this study will help demonstrate the different characteristics of text messages (positive versus negative valence and features such …

Annual Graduate Faculty Meeting [Program], April 25, 2024, University Of Northern Iowa. Graduate College.

Annual Graduate Faculty Meeting & Awards Ceremony Programs

No abstract provided.

How Do I Get Money? And Then Where Should I Spend It All?, Leah Pereira

Digital Edition

An independent student produced newspaper from the University of New Hampshire.

Climate Change And Implications For National Security And International Law In The Arctic, Choteau X. Kammel

Texas A&M Journal of Property Law

Climate change threatens national security due to the potential it carries to destabilize fragile regions, damage military installations, and exacerbate existing tensions between countries. While these effects will be global, the Arctic region represents a microcosm of a future where climate change affects the strategic priorities of states and renders existing governing institutions inadequate. Moreover, climate change will challenge the collage of “soft” international law that governs the Arctic, administered primarily through the Arctic Council’s collaborative forum. While this system has been effective, the opening of the Far North to increased sea passage, commercial exploitation, and great powers’ interests necessitates …