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Poly(Vinyl Alcohol)/Zsm-5 Zeolite Mixed Matrix Membranes For Pervaporation Dehydration Of Ethanol And N-Propanol, Ji Ting Wang, Zhen Huang, Ya Tong Zhu, Si Ning Wang

Turkish Journal of Chemistry

In this study, mixed matrix membranes (MMMs) composed of poly(vinyl alcohol) (PVA) and porous ZSM-5 zeolite are thoroughly investigated for concentrating alcohols of ethanol and n-propanol via dewatering pervaporation. The effects of the zeolite content (10–30 wt.%), feed composition (5–30 wt.% water), and feed temperature (50–90 °C) on the pervaporation flux/separation factor and component permeance/selectivity of these MMMs are examined in detail. These MMMs achieve higher separation efficiency and pervaporation flux than their pure PVA counterparts as expected, even if the dehydration results strongly depend on the pervaporation conditions. The disparity in pervaporation performances acquired for different alcohol solutions may …

Exploring The Photocatalytic And Photodynamic Effects Of Bodipy-Linked Titanium Dioxide Nanoparticles, Seda Demi̇rel Topel

Turkish Journal of Chemistry

This study aimed to investigate the photocatalytic and photodynamic actions of a 2,6-diiodinated-BODIPY (2,6-diI2-Bod) photosensitizer (PS) covalently linked to TiO2 nanoparticles (NPs). The TiO2 NPs were synthesized utilizing the hydrothermal technique, yielding an average particle size of 4–5 nm as ascertained by transmission electron microscopy and 6.4 nm as determined by dynamic light scattering measurements. The integration of the nonsoluble Bod PS to TiO2 NPs provided increased dispersibility in physiological media, making it more applicable to photodynamic therapy applications. Bod-TiO2 NPs exhibited moderate efficiency of 56.9% in singlet oxygen generation. Additionally, the photocatalytic behavior of the TiO2 NPs was evaluated …

Scope And Limitations Of The Preparation Of Xanthones Using Eaton’S Reagent, Johann Bosson

Turkish Journal of Chemistry

Xanthones comprise a large family of heterocycles displaying fascinating biological properties. Many synthetic protocols have been developed for the preparation of natural and nonnatural xanthone derivatives. Among them, condensation reactions between salicylic acid derivatives and phenol partners are highly desirable. Those reactions can be satisfactorily performed using Eaton’s reagent (P2O5 in CH3SO3H). Despite being highly effective with a variety of substrates, this approach presents limitations that depend on the electronic nature of the reaction precursors. The scope and limitations of the Eaton’s reagent-mediated preparation of xanthones are herein presented and discussed. In short, this approach is limited to the utilization …

Comparison Of Metal-Carbenoid Reactions Of Β-2-Five-Membered Heteroaryl Substituted Α,Β-Unsaturated Ketones, Kumsal Eroğlu, Olcay Anaç, Füsun Şeyma Kişkan

Turkish Journal of Chemistry

In this study, β-2-heteroaryl substituted (N-methyl 2-pyrrolyl, 2-thiophenyl, 2-furyl) α,β-unsaturated ketones were reacted with two α-diazo carbonyl compounds that had different characteristics (dimethyl diazo malonate and 1-diazo-1-phenyl-propane-2-one) in the presence of both copper and rhodium catalysts. In the case of reactions with N-methyl 2-pyrrolyl α,β-unsaturated ketones, the major product was the insertion derivative. However, in the reactions of 2-thiophenyl and 2-furyl α,β-unsaturated ketones with dimethyl diazomalonate (acceptor-acceptor disubstituted), only dihydrofuran products were formed over carbonyl ylides. When 2-thiophenyl and 2-furyl α,β-unsaturated ketones were reacted with 1-diazo-1-phenyl-propane-2-one (donor-acceptor disubstituted), 1-phenylpropane-1,2-dione was obtained under our reaction conditions.

Photophysical, Thermal, And Dft Studies On A Tetraaryl-Azadipyrromethene Ligand And Its Zinc(Ii) Complex, Gökhan Sevi̇nç

Turkish Journal of Chemistry

An azadipyrromethene ligand (H1) and homoleptic zinc(II) (H1-Zn) complex were synthesized. The resulting structures were elucidated by NMR, FTIR, and HRMS techniques. The photophysical properties and effects of complexing the zinc(II) atom to azadipyrromethene ligands in solution were studied by means of UV-Vis absorption and fluorescence spectroscopy. Experimental findings were elucidated using density functional theory computations and interfragment charge transfer (IFCT) and electron-hole analyses. The fluorescence features were found to be negligible. The ligand molecule decayed at a rate of 3% while the complex decayed at 2% upon photoirradiation based on photostability experiments. The singlet oxygen quantum yields of the …

Synthesis And Singlet Oxygen Generation Of Boron- 2-(4,5-Dibromo-1h-Imidazole-2-Yl)-3,5-Dipyrazolopyridine Complex For Antimicrobial Photodynamic Therapy, Zeynep Ekmekçi̇, Seda Karaoğlu

Turkish Journal of Chemistry

In this study, the pyridine side of a boron 2-(2'-pyridyl) imidazole (BOPIM) core, which has very few derivatives synthesized in the literature and can show fluorescence properties in solid form, was derivatized with 1-methylpyrazole, predicted to have activity against fungi or bacteria according to the literature. Additionally, its imidazole side was brominated to increase the efficiency of singlet oxygen production by increasing the intersystem crossing. The photophysical properties of the new synthesized BOPIM derivative were investigated in general organic solvents with different polarities. While the wavelength of the maximum absorbance was determined as 406 nm in CH2Cl2 and THF, the …

Bromination And Conversion Of Tetrahydro-1h-Indene To Bisoxirane With A New Approach: Synthesis, Structural Characterization By Spectroscopic And Theoretical Methods, And Biological Analysis Supported By Dft And Docking, Raşi̇t Fi̇kret Yilmaz, Sultan Erkan, Sali̇h Ökten, Ahmet Tutar, Ertan Şahi̇n

Turkish Journal of Chemistry

In this study, a new method for synthesizing diepoxides is proposed. Tetrahydroindene 1 was brominated with NBS in the presence of LiClO4 and acetic acid, resulting in the formation of dibromodiacetate derivatives 2 and 3. Treatment of compounds 2 and 3 with NaOH in methanol produced a mixture of diepoxides 4 and 5. Additionally, direct bromination of tetrahydro-1H-indene yielded tetrabromo octahydroindene isomers 6 and 7. The structures of the compounds were characterized using spectroscopic techniques such as 1H NMR, 13C NMR, APT, COSY, and XRD. The new method provides an easy and selective route to access epoxides for the synthesis …

Removal Of Toxic Cr(Vi) From Aqueous Medium With Effective Magnetic Carbon-Based Nanocomposites, Ferda Ci̇van Çavuşoğlu, Gülsüm Özçeli̇k, Şahi̇ka Sena Bayazi̇t

Turkish Journal of Chemistry

Cr(VI), which has toxic effects, is a heavy metal and it must be removed from the environment due to the various damages it causes. In this study, the removal of Cr(VI) pollutants from aqueous solutions with Fe3O4-based materials using a batch adsorption technique was investigated. Magnetically modified graphene nanoplatelet (GNP)-based nanocomposites were prepared and their structures were characterized by FTIR, XRD, SEM, BET, and TGA techniques. The effects of various physicochemical parameters such as adsorbent dose, contact time, initial Cr(VI) solution concentration, pH, and the presence of coexisting ions (NaCl) on the adsorption process were investigated. Accordingly, the optimum conditions …

Intercalation Of Pyrazolone-Based Oxalamide Metal Complexes Into Na-Montmorillonite For Catalytic Liquid-Phase Oxidation Of Phenol Using H2o2, Serhat Uzan, Eyüp Başaran

Turkish Journal of Chemistry

The intercalation of pyrazolone-based oxalamide metal complexes into Na-montmorillonite (Na-MMT) for catalytic liquid-phase oxidation of phenol using H2O2 was undertaken by a flexible ligand method using metal ions including Mn(II), Zn(II), and Sn(II). First, the metal ions were exchanged with the sodium ions of Na-MMT, and then these metal ions were complexed with a new pyrazolone-based oxalamide ligand. The intercalated metal complexes were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental analysis, and thermogravimetric analysis. Phenol was successfully oxidized by heterogeneous catalysts based on Mn(II), Zn(II), and Sn(II) pyrazolone-based oxalamide complexes intercalated into …

Production Of Gelatin Fibrous Mats Using Different Nanofiber Production Methods For Medical Applications And Comparison Of Their Properties, Melike Güngör, Kevser Sağlamkol, Zeynep Yağmur Baydemi̇r, Ali̇ Kiliç

Turkish Journal of Chemistry

In the literature, there are studies on medical applications using different nanofiber production methods with natural polymers. However, each system has different fiber-forming capabilities. For this reason, in this study, we investigated the production of nanofibers from a biodegradable natural polymer, gelatin, using four separate nanofiber production methods, namely electrospinning (ES), electroblowing (EB), solution blowing (SB), and centrifugal spinning (CS). Our aim was to determine the most suitable fibrous web structure for medical applications and contribute to science in this respect. It was observed that the thinnest fibers (386 nm) and the heaviest mats (15.975 g m–2) were produced by …

Ph Responsive Curcumin Released From Urea-Amine Group Functionalized Mesoporous Organosilica Nanoparticles, Osman Tayyar Arli, Yaşar Gök, Hali̇l Zeki̇ Gök

Turkish Journal of Chemistry

Studies on natural products with anticancer properties have gained more importance in recent years in order to not damage healthy tissues during cancer treatments or to perform the treatment causing the least damage. Curcumin is a common natural product with anticancer properties, but its low solubility, instability, and bioavailability have limited its use in clinical applications in cancer research. As a proposed solution to this problem, a new mesoporous organosilica nanocarrier (MON-A) functionalized with a 1,2-diphenylethane-1,2-diamine structure capable of pH-controlled release was prepared in this study. MON-A was characterized by TGA, BET, XRD, FT-IR, and SEM-EDS analyses. Dispersion of MON-A …

Quaternized Chitosan/Pva/Natural Bioactive Agent Electrospun Wound Scaffolds: Production, Characterization, And Investigation Of Release Kinetics, Ezgi Eren Belgin, Cankiz Gi̇zem Deli̇balta

Turkish Journal of Chemistry

Quaternized chitosan (HTCC) was synthesized and characterized to increase chitosan solubility. Then HTCC was electrospun with poly (vinyl alcohol) (PVA) and prepared natural bioactive agent (Calendula officinalis) extract was loaded onto fibers for wound scaffold applications. Morphological, structural, and mechanical characterization of the produced wound scaffolds was performed and their in vitro bioactive component release behavior was investigated. As a result, it was observed that the degree of quaternization of chitosan was 0.89, and synthesized HTCC was soluble in acidic, basic, alkaline media and could be electrospun with PVA in the presence of a natural bioactive agent. The presence of …

Determining The Presence And Size Of Shoulder Lesions In Sows Using Computer Vision, Shubham Bery, Tami M. Brown-Bandl, Bradley T. Jones, Gary A. Rohrer, Sudhendu Raj Sharma

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Shoulder sores predominantly arise in breeding sows and often result in untimely culling. Reported prevalence rates vary significantly, spanning between 5% and 50% depending upon the type of crate flooring inside a farm, the animal’s body condition, or an existing injury that causes lameness. These lesions represent not only a welfare concern but also have an economic impact due to the labor needed for treatment and medication. The objective of this study was to evaluate the use of computer vision techniques in detecting and determining the size of shoulder lesions. A Microsoft Kinect V2 camera captured the top-down depth and …

Melittological Notes From Guatemala (Hymenoptera: Anthophila), 1. New Country Records For Centris Fabricius (Apidae) And Zikanapis Moure (Colletidae), Silas Bossert, José Monzón-Sierra, Richard S. Zack, Ana Cristina García, Elizabeth A. Murray

Insecta Mundi

Abstract

Three species of bees (Hymenoptera: Apidae, Colletidae) are newly recorded for Guatemala: Centris obscurior Michener, Centris vidua Mocsáry, and Zikanapis inbio (Michener, Engel and Ayala). We discuss aspects of their biology and circumstances of the collecting events and provide information on their presently known distribution.

Resumen

Se registran por primera vez tres especies de abejas (HymenopteraN: Apidae, Colletidae) para Guatemala: Centris obscurior Michener, Centris vidua Mocsáry, y Zikanapis inbio (Michener, Engel y Ayala). Discutimos aspectos de su biología, circunstancias bajo las cuáles fueron colectadas y se provee información en la distribución conocida actualmente.

The Assessment Of Digital Reviews By Foreign Visitors To Goreme Open Air Museum Within The Concept Of Cultural Tourism Destination, Egemen G. Tukenmez

Journal of Mediterranean Tourism Research

Cultural tourism is one of the most demanded types in tourism system by visitors and people tend to experience and witness historical and unique attractions of different types of destinations. Open-air museums constitute one of the structures that attract attention, especially for foreign visitors, within the scope of cultural tourism. With the development of technology and the increase of different channels in online travel platforms, people who visit open air museums begins to write comments about their experiences via these structures. In these comments, they possess different features of the open-air museums and factors that positively and negatively affect the …

Sparking Joy In The University Of North Florida Rare Books Collection: A Case Study In Reappraisal And Deaccessioning, Susan Swiatosz

Library Presentations & Publications

When it comes to collection reappraisal or deaccessioning, rare book or non-circulating research collections are often overlooked until space considerations bring the issue to the forefront. After all, no librarian likes discarding books, particularly historic ones. This case study shows how the Special Collections and University Archives at the University of North Florida reappraised a rare books collection and created collecting criteria to aid in the disposition of rare and non-circulating books. Although lack of space was clearly a pressing issue, the rare and non-circulating book collection at UNF lacked development guidance for many years, becoming unwieldy and no longer …

Recovery Of Cirl Bunting, Emberiza Cirlus, Song Diversity After Translocation, Sa Collins, S Croft, C Jeffs, S Brown, Sr De Kort

School of Biological and Marine Sciences

In order to improve conservation outcomes translocation or reintroduction of individuals may be necessary. When song learning birds are translocated, changes in the cultural diversity of song repertoires, or abnormal vocalizations, in the new population can be a problem. We monitored song production over 8 years in a reintroduced population of the cirl bunting (Emberiza cirlus). Chicks were removed from nests in Devon, UK, between 2006 and 2011, translocated at 6 days old to be hand-reared and released in Cornwall, UK. Recordings at the release site in 2011 showed a significantly reduced population repertoire and individuals sang abnormal song types …

Design Optimization Of The Lift Mechanism In The Robotic Walking Training Device Using The Engineering Design Methodology, Austin Bourgeois, Brian Rice, Chung-Hyun Goh

Mechanical Engineering Faculty Publications and Presentations

Partial paralysis caused by spinal cord injury (SCI) or stroke are two of the most prevalent forms of physical disability. Through proper gait training, people with incomplete SCI have more potential to retain or regain the ability to walk than those with complete SCI. To help patients who have these disabilities regain the function of walking unassisted, the robotic walking training device (RWTD) has been developed to perform gait rehabilitation. This research plays a pivotal role in advancing medical robotic technology and gait rehabilitation by conducting a comprehensive evaluation and comparison of three lift mechanisms. Specifically, the lift mechanisms are …

Polluted Soundscapes And Contrepoison In Sixteenth-Century France: The Sonic Warfare Leading To The First War Of Religion, John Romey

Yale Journal of Music & Religion

In the decades leading up to and during the first years of the Wars of Religion, Huguenots and Catholics waged audible battles over sonic territories using songs as spiritual weapons. Huguenots memorized and communally sang metrical psalms in the vernacular as sonic markers of the Reformed faith. Catholics interpreted these same sounds as pollution in need of eradication. Artus Desiré, for example, responded by producing polemical contrepoison, musical antidotes created by composing new countertexts to Marot’s Psalm tunes to “cleanse” them of their perceived heresy. While scholars have long recognized both the destructive nature of iconoclastic attacks on religious …

King’S Vibrato: Modernism, Blackness, And The Sonic Life Of Martin Luther King, Jr., Joshua Lazard

Yale Journal of Music & Religion

A book review is presented for King's Vibrato: Modernism, Blackness, and the Sonic Life of Martin Luther King, Jr., authored by Maurice O. Wallace, by Joshua Lawrence Lazard.

Enhanced Solar Tracking System Using Internet Of Things Technology, Qawiem Naif Qisti, Noramalina Abdullah, Khairul Azman Ahmad

Platform: A Journal of Engineering

Solar energy has grown in popularity in recent years. Conventional solar panels cannot provide enough energy to meet consumer demand. Therefore, more solar panels are needed to meet consumer demand. The Internet of Things (IoT) Solar Tracker maximises solar energy collecting by connecting the physical and digital worlds. This study integrates IoT to improve solar tracker performance. Blynk uses the NodeMCU ESP8266 control unit to monitor voltage, current, and power usage. This research uses the Arduino IDE, a photoresistor sensor, and a current sensor, INA219. This work advances solar energy efficiency. By comparing solar panel electrical qualities in different environments, …

Improved Design For Horizontal Axis Wind Turbine Blades With Winglets, Hamza Ben Ahmadi, Yousef Abdulbari Atfah, Catherine Kamal Samy, Lujain Subhi, Haya Fares Turkmani, Sharul Sham Dol

Platform: A Journal of Engineering

The horizontal axis wind turbine blades are modified to enhance the turbine's aerodynamic performance. The performance of the modified geometry was evaluated by comparing the lift, drag and torque findings to the same propeller with a straight leading edge. The symmetrical airfoil of NACA 0012 was chosen for the turbine blade profiles. The computational fluid dynamics (CFD) simulation was performed using the shear stress transport (SST) k-ω turbulence model to capture the vortical structures for the inlet wind speed of 20 m/s. From the simulation results, it has been shown that the four blades with winglets at 15° angle of …

Performance Analysis Of Solar Water Heater: A Case Study In Al Seeb, Oman, Zainab Albalushi, Girma T. Chala, Sreejaya K.V.

Platform: A Journal of Engineering

The 2040 vision of the Sultanate of Oman has given remarkable attention to providing green energy supplies to different sectors in the country. The solar water heater system is projected to boost Oman's renewable energy utilisation and help achieve the country’s energy sustainability. Due to extreme weather conditions, electric water heaters consume most of the electricity, mainly during the winter. In this study, the evacuated tube solar water heater was installed, and the system's performance at different inclination angles and weather conditions was investigated. The experiment was conducted during various weather conditions and at three different inclination angles, such as …

A Comparative Analysis Of Cryogenic, Adsorption And Amine-Based Absorption Techniques For Co₂ Capture, Siti Nuraishah Zuraidi, Hazlina Husin

Platform: A Journal of Engineering

Cryogenic carbon capture (CCC), adsorption-based CO2 capture and amine-based absorption are the key carbon capture and storage (CCS) technologies discussed in this review paper. This paper analysed these techniques' fundamental mechanisms, advantages, disadvantages and developments. This paper revealed the promising role of adsorption-based CO2 capture utilising solid adsorbents, emphasises the potential of cryogenic carbon capture for capturing and storing CO2, and examines widely used amine-based absorption technology. The comparison of these technologies provides insight into their efficiency, sustainability, and commercialisation potential in achieving a low-carbon future.

Influence Of Ph On The Wettability Of Carbonate Rocks For Carbon Dioxide Sequestration In Deep Saline Aquifer, Khaw Chi Foong, Sia Chee Wee, M Aslam Md Yusof

Platform: A Journal of Engineering

The escalating carbon dioxide (CO2) emissions have precipitated climate change, underscoring the urgent need for innovative solutions. Carbon Capture and Storage (CCS) represents a groundbreaking technology to mitigate carbon emissions by capturing CO2 and depositing it deep within reservoirs. This study focuses on the storage aspect of CCS by scrutinising reservoir properties. A pivotal factor influencing the geological storage of CO2 is the wettability of the rock/CO2/brine system, which is intricately linked to the contact angle. However, previous research has indicated that pH can significantly influence the wettability of this system. Acetic acid, a prevalent organic acid in the petroleum …

Buddhist Music As A Contested Site: The Transmission Of Teochew Buddhist Music Between China And Singapore, Jie Zhang

Yale Journal of Music & Religion

In the Chaozhou City Gazetteer of Buddhism & Chaozhou Kaiyuan Monastery Gazetteer published in 1992, the then Abbot of the Kaiyuan Monastery, Shi Huiyuan 释慧原 heavily condemned the Qing Dynasty (1644–1911) monk Shi Kesheng 释可声 (date unknown) for "starting the sins among laities in the Chaozhou region who dared transgressing (the Buddhist doctrines) and became chant leaders in a flaming mouth ceremony.” Why was the Abbot so upset with a fellow monk back in history? What did Kesheng do, and what were the implications of him starting this "transgression"? This article investigates the history of the international traffic of Buddhist …

(Special Section, Hymns Beyond The Congregation Ii): Spiritual Concert-Fundraisers, Singing Conventions, And Cherokee Language Learning Academies: Vernacular Southern Hymnbooks In Noncongregational Settings, Jesse P. Karlsberg, Kaylina M. Crawley, Sara S. Hopkins

Yale Journal of Music & Religion

Noncongregational settings were integral to hymnody in the postbellum settler colonial context of the southern United States during the late nineteenth and early twentieth centuries. The incorporation of hymn singing into a wide range of noncongregational settings served Black, white, and Native populations in navigating unsettled racial dynamics during this period across the US South and its diasporas. This essay features three case studies examining hymn collections intended or repurposed for a range of noncongregational uses: spiritual collections connected with the performing ensembles of black institutions, a shape-note songbook that attempted to bridge singing convention and congregational contexts, and a …

Ways Of Explaining Law, Dan Priel

Articles & Book Chapters

No abstract provided.

Viral Targeting Of Importin Alpha-Mediated Nuclear Import To Block Innate Immunity, Olivia A Vogel, Jade K Forwood, Daisy W Leung, Gaya K Amarasinghe, Christopher F Basler

2020-Current year OA Pubs

Cellular nucleocytoplasmic trafficking is mediated by the importin family of nuclear transport proteins. The well-characterized importin alpha (IMPA) and importin beta (IMPB) nuclear import pathway plays a crucial role in the innate immune response to viral infection by mediating the nuclear import of transcription factors such as IRF3, NFκB, and STAT1. The nuclear transport of these transcription factors ultimately leads to the upregulation of a wide range of antiviral genes, including IFN and IFN-stimulated genes (ISGs). To replicate efficiently in cells, viruses have developed mechanisms to block these signaling pathways. One strategy to evade host innate immune responses involves blocking …

Comparing Ait And Eft In Reduction Of Negative Emotions Associated With A Past Memory: A Randomized Control Study, Gregory Brown, Kavita Batra, Emily Dorin, Raveena Bakhru, Andrew Han, Arianna Palermini, Robert Sottile, Sherine Khanbijian, Michael Hower

Psychiatry & Behavioral Health Faculty Research

Advanced Integrative Therapy [AIT] is an Energy Psychology-based system of intervention utilized by psychotherapists since the late 1990s. Recently, a study investigated the perceptions of therapists regarding the effectiveness of AIT in reducing negative emotions related to past traumatic events. Emotional Freedom Techniques (EFT) are a set of well-researched Energy Psychology based interventions which have been established as an effective intervention for post-traumatic stress disorder. This study is the first to compare the effectiveness of AIT to EFT in reducing negative emotions associated with a particular memory in a sample of college and professional students, who were randomly assigned to …