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Design, Synthesis, And Spasmolytic Activity Of Thiophene-Based Derivatives Via Suzukicross-Coupling Reaction Of 5-Bromothiophene-2-Carboxylic Acid: Their Structural Andcomputational Studies, Nasir Rasool, Hafiz Mansoor Ikram, Ammara Rashid, Nazia Afzal, Muhammad Ali Hashmi, Muhammad Naeem Khan, Ayesha Khan, Imran Imran, Hafiz Muhammad Abdur Rahman, Syed Adnan Ali Shah

Turkish Journal of Chemistry

In the current research work, a facile synthesis of a series of novel thiophene-based derivatives of 5-bromothiophene-2- carboxylic acid (1) have been synthesized. All analogs (5a-5e, 10a-10f) were obtained from the coupling reaction of 5-bromothiophene- 2-carboxylic acid (1) and different arylboronic acids with moderate-to-good yields under controlled and optimal conditions. The structures of the newly synthesized compounds were characterized through spectral analysis and their spasmolytic activity, and most of the compounds exhibited potentially good spasmolytic effect. Among the synthesized analogs, compound phenethyl 5-(3,4-dichlorophenyl)thiophene-2-carboxylate (10d) particular showed an excellent spasmolytic effect with an EC$_{50}$ value of 1.26. All of the compounds …

Synthesis And Structural Analysis Of Nonstoichiometric Ternary Fulleride K1.5ba0.25csc60, Havva Esma Okur Kutay

Turkish Journal of Chemistry

The existence of cation-vacancy sites in fullerides might lead to long-range ordering and generate a new vacancy-ordered superstructure. The purpose of this work is to search whether or not long-range ordering of vacant tetrahedral sites, namely superstructure emerges in nonstoichiometric K1.5Ba0.25CsC60 fulleride. Therefore, K1.5Ba0.25CsC60 with cation-vacancy sites is synthesized using a precursor method to avoid inadequate stoichiometry control and formation of impurity phases within the target composition. For this purpose, first, phase-pure K6C60, Ba6C60 and Cs6C60 precursors are synthesized. Stoichiometric quantities of these precursors are used for further reaction with C60 to afford K1.5Ba0.25CsC60. Rietveld analysis of the high-resolution synchrotron …

Evaluation Of Carbonic Anhydrase And Paraoxonase Inhibition Activities And Molecular Docking Studies Of Highly Water-Soluble Sulfonated Phthalocyanines, Emre Güzel, Fati̇h Sönmez, Sultan Erkan, Kübra Çikrikci, Adem Ergün, Nahi̇t Gençer, Oktay Arslan, Makbule Koçak

Turkish Journal of Chemistry

The investigation of carbonic anhydrase and paraoxonase enzyme inhibition properties of water-soluble zinc and gallium phthalocyanine complexes (1 and 2) are reported for the first time. The binding of p-sulfonylphenoxy moieties to the phthalocyanine structure favors excellent solubilities in water, as well as providing an inhibition effect on carbonic anhydrase (CA) I and II isoenzymes and paraoxonase (PON1) enzyme. According to biological activity results, both complexes inhibited hCA I, hCA II, and PON1. Whereas 1 and 2 showed moderate hCA I and hCA II (off-target cytosolic isoforms) inhibitory activity (Ki values of 26.09 μM and 43.11 μM for hCA I …

Structural Insights Of Two Novel N-Acetyl-Glucosaminidase Enzymes Through In Silico Methods, Ari̇f Sercan Şahutoğlu, Hati̇ce Duman, Steven Alex Frese, Sercan Karav

Turkish Journal of Chemistry

EndoBI-1 and EndoBI-2 are two endo-β-N-acetylglucosaminidase isoenzymes that cleave N-N'-diacetylchitobiosyl moieties found in various types of native N-glycans. These N-glycans are indigestible by human infants and adults due to the lack of responsible glycosyl hydrolases and they act as selective prebiotics for a probiotic microorganism, Bifidobacterium longum subsp. infantis, in the large intestine. The selectivity and the thermostability of EndoBI-1 and EndoBI-2 suggest that these enzymes may be useful for many scientific and industrial applications. In this study, the growing numbers of homologous sequences in different databases were exploited in a comparative approach to investigate structural properties of EndoBI-1 and …

Highly Luminescent Water-Dispersed Silicon Quantum Dots For Fluorometric Determination Of Oxytetracycline In Milk Samples, Hayri̇ye Eda Şatana Kara, Burak Demi̇rhan, Buket Er Demi̇rhan

Turkish Journal of Chemistry

A fluorescent probe based on silicon quantum dots (SiQDs) was developed for the selective and sensitive detection of oxytetracycline (OTC) via the inner filter effect (IFE). The water-soluble fluorescent SiQD was synthesized based on the reaction of 3-Aminopropyltriethoxysilane (APTES) and sodium citrate as precursors by the one-pot hydrothermal process. The strong fluorescence emission of quantum dots (QDs) was obtained at 440 nm when excited at 350 nm and OTC had a broad absorption band between 200 and 400 nm. The excitation spectrum of SiQDs was completely overlapped with the absorption spectrum of OTC. The light at an excitation wavelength of …

Proline-Based Organocatalyst-Mediated Asymmetric Aldol Reaction Of Acetone With Substituted Aromatic Aldehydes: An Experimental And Theoretical Study, Nevi̇n Arslan, Selami̇ Ercan, Necmetti̇n Pi̇ri̇nççi̇oğlu

Turkish Journal of Chemistry

This work involves a facile synthesis of three (S)-proline-based organocatalysts with C$_{2}$ symmetry and their effects in enantioselective aldol reaction of acetone with substituted aromatic aldehydes. Moderate enantioselectivities (up to 61% ee) were obtained depending on the nature of the substituents on the aryl ring. Computational calculations at HF/6-31 + G(d) level were employed to underline the enantioselectivity imposed by all the organocatalysts. Higher calculations at B3LYP/6-311 ++ G(d,p) scrf=(solvent=dichloromethane)//B3LYP/6-31 + G(d) levels of theory were also performed for the aldol reaction of acetone with benzaldehyde and 4-nitrobenzaldehyde catalyzed by 1. The computationaloutcomeswereconsistentwiththoseproducedbyexperimentalresultsandtheywerevaluabletoelucidate the mechanism for the observed stereoselectivity.

Effect Of Various G-C3n4 Precursors On The Catalytic Performance Of Alkylorganotin-Based Catalysts In Acetylene Hydrochlorination, Yibo Wu, Fuxiang Li, Jianwei Xue, Zhiping Lv

Turkish Journal of Chemistry

A series of alkylorganotin-based catalysts (Sn-g-C$_{3}$N$_{4}$/AC) was prepared by wet impregnation in ethanol using different g-C$_{3}$N$_{4}$ precursors and alkylorganotin compounds. The structure, texture, surface composition, and adsorption properties of the as-prepared catalysts were extensively characterized. Then, the obtained samples were evaluated for their catalytic performance in hydrochlorination of acetylene. The results provided by the X-ray photoelectron spectroscopy, acetylene temperature-programmed desorption, and HCl adsorption confirmed the nature of the active sites (i.e. Sn-N$_{x}$ ) involved in the reactant adsorption, and hence in the improved catalytic performance. These active sites were also related to the improved lifetime of alkylorganotin-based catalysts in the …

Sensitive Determination Of Hydrogen Peroxide In Real Water Samples By High Spin Peroxo Complex, Tuğba Yavuz, Levent Peli̇t

Turkish Journal of Chemistry

In this paper, a fast, cheap, simple, sensitive and selective spectrophotometric method based on high spin peroxo-Fe(III)-EDTAcomplexinthealkalinemediumwasdevelopedforthedeterminationofhydrogenperoxide(H$_{2}$O$_{2}$) in real water samples. The purple-coloured complex with a maximum absorbance at a wavelength of 525 nm was formed. Various parameters such as type of stabilizer reagent and its concentration, reaction time, Fe(III), EDTA and NH3 concentration were optimized. The method was confirmed with the Beer?s law with a molar absorption coefficient of267.36Lmol$^{-1}$ cm$^{-1}$ in the 8.3×10$^{-6}$ -4.08×10$^{3}$ mol/L concentrationrange. Sandell's sensitivityoftheproposed method was also calculated as 0.188 µg/cm2. LOD and LOQ were determined as 2.5 ×10$^{-6}$ and 8.3 ×10$^{-6}$ mol/L, respectively. Intraday …

Combined Computational And Experimental Studies On Cysteine-Sulfadiazine Adduct Formation, Nursel Açar Selçuki̇, Emi̇ne Coşkun, Ender Bi̇çer

Turkish Journal of Chemistry

The electrochemical characterization of sulfadiazine-cysteine (SD-CYS) adduct formation was performed in phosphatebuffer(pH7)onthebasisofvoltammetriccurrentandpeakpotentialmeasurements. Duetotheassociationof cysteine with sulfadiazine, the reduction peak currents of mercuric and mercurous cysteine thiolates decreased and their peak potentials simultaneously shifted to less negative potentials. By using the current changes of mercurous cysteine thiolate, it was determined that cysteine and sulfadiazine are associated with a 1:1 stoichiometry with a conditional association constant of 1.99 ×10$^{4}$ M$^{-1}$. In addition to experimental studies, a computational approach was carried out to study the geometrical parameters, electron densities, and UV-Vis absorption spectra of sulfadiazine and SDCYS adduct in water. Calculated (B3LYP/6-311++G(d,p) level) …

2-[(3-Aminoalkyl-(Alkaryl-,Aryl-))-1 H-1,2,4-Triazol-5-Yl]Anilines: Synthesis And Anticonvulsant Activity, Yulya Martynenko, Galina Berest, Nina Bukhtiayrova, Igor Belenichev, Oleksiy Voskoboinik, Sergiy Kovalenko

Turkish Journal of Chemistry

The presented work is devoted to the development of synthesis methods for novel 2-[(3-aminoalkyl-(alkaryl-, aryl-))-1$H$-1,2,4-triazolo]anilines. Abovementioned compounds were obtained via hydrazinolysis (Ing-Manske procedure) and acid hydrolysis of corresponding $N$-acylated {([1,2,4]triazolo[1,5-$c$]quinazolin-2-yl)alkyl-(alkaryl-, aryl-)} amines. The regioselectivity of hydrazinolysis and hydrolysis were established. The features of spectral characteristics were studied and discussed. Characteristic patterns of protons signals splitting in $^{1}$H NMR of the synthesized compounds were established. The effect of the synthesized compounds on the pentylenetetrazol seizures was studied. It was found that according to some indicators, anticonvulsant activity of 2-[(3-aminoalkyl-(alkaryl-, aryl-))-1$H$-1,2,4-triazolo]anilines superior or comparable with effect of the reference drug "Lamotrigine". It …

An Anthracene Based Fluorescent Probe For The Selective And Sensitive Detection Of Chromium (Iii) Ions In An Aqueous Medium And Its Practical Application, Erman Karakuş

Turkish Journal of Chemistry

An anthracene based fluorescent probe, integrated with thiophene moiety, exhibited selective and sensitive detection of chromium (III) ions over other metal ions. Its synthesis was achieved by simple mixing of two commercially available compounds, 2-aminoanthracene, and 2-thiophenecarboxaldehyde, in onestep without the needed complex purification process. The probe molecule (ANT-Th) offered exceptional features such as "turn-on" fluorescence response, low detection limit (0.4 μM), and fast response time (< 1 min) via C$=$N bond hydrolysis. Also, a simple test paper system was developed for the rapid detection of chromium (III) ions with the naked eye.

Effects Of Composition On Catalytic Activities Of Molybdenum Doped Platinum Nanoparticles, Aslihan Sümer

Turkish Journal of Chemistry

The physical and chemical properties of bimetallic nanoparticles can be optimized by tuning the particle composition. In this study, we identified CO adsorption and dissociation energetics on five Pt-Mo nanoparticles at different concentrations, the lowest energy Pt$_{7}$, Pt$_{6}$Mo, Pt$_{5}$Mo$_{2}$, Pt$_{4}$Mo$_{3}$, and Mo$_{7}$ clusters. We have shown that the CO adsorption and dissociation energies and preferred CO adsorption sites are largely dependent on the composition of the nanoparticles. As the Mo concentration increases, the strength of the C-O internal bond in the adsorption complex decreases, as indicated by a decrease in the C-O stretching frequency. Also, more Mo sites in the …

Modeling And Optimization Of Simultaneous Degradation Of Rhodamine B And Acid Red 14 Binary Solution By Homogeneous Fenton Reaction: A Chemometrics Approach, Nasrin Aliasgharlou, Morteza Bahram, Pezhman Zolfaghari, Naiemeh Mohseni

Turkish Journal of Chemistry

This study aimed to propose a mathematical method to investigate and optimize the simultaneous elimination process of multiple organic pollutants using the Fenton process. Hence, the treatment of rhodamine B (RB) and acid red 14 (AR14) dyes in their binary solution was studied. Multivariate curve resolution alternating least square (MCR-ALS), a novel chemometric method, was applied along with correlation constraints to resolute the UV-Vis spectrophotometric data, enabling quantification of investigated dyes despite a high spectral overlapping. Response surface methodology was adopted to assess the model and optimize individual and interactive effects of three independent factors (Fe$^{2+}$, H$_{2}$O$_{2}$ and initial pH) …

A Comparative Study On The Monovalent And Divalent Cation Separation Of Polymeric Films And Membranes From Salt Solutions Under Diffusion-Dialysis, Serkan Acar, Hacer Yeşi̇m Cengi̇z, Ayça Ergün, Eymen Konyali, Hüseyi̇n Deli̇göz

Turkish Journal of Chemistry

This study deals with selective separation of mono- and divalent cations from aqueous salt solutions using polymeric films based on polyethylene (PE) and polyamide6 (PA6), and two different commercial nanofiltration (NF) membranes. The diffusion rates (D) of ions (Na$^{+}$ and Ca$^{2+})$, separation factors ($\alpha )$ and ion rejections (R) of the films and NF membranes are examined comparatively as well as their surface morphology and hydrophilicity. It is observed that the diffusion rates of Na$^{+}$are in the range of 0.7-1.8 $\times $ 10$^{-8}$cm$^{2}$.s$^{-1\, }$in the decreasing order of PE $>$ NF90 $>$ NF270 $>$ PA6 while Ca$^{2+\, …

Synthesis Of New Cyclotriphosphazene Derivatives Bearing Schiff Bases And Theirthermal And Absorbance Properties, Semi̇h Doğan, Süreyya Oğuz Tümay, Ceylan Mutlu Balci, Serkan Yeşi̇lot, Serap Beşli̇

Turkish Journal of Chemistry

In this study, a series of cyclotriphosphazene derivatives containing a Schiff base (3a-3d) were synthesized by the reactions of hexachlorocyclotriphosphazene (1) with bis-aryl Schiff bases (2a-2d) having different terminal groups (H, F, Cl, and Br). The products (3a-3d) were characterized by elemental and mass analyses, FT-IR, and $^{1}$H, $^{13}$C, and 31 P NMR spectroscopies. Furthermore, the structure of compound 3a was also determined by X-ray crystallography. The thermal behaviors and the spectral properties of the new cyclotriphosphazene compounds (3a-3d) were investigated and the results were compared in the series.

Synthesis And Spectroscopic Properties Of (N/O) Mono- Anddispirocyclotriphosphazene Derivatives With Benzyl Pendant Arms: Study Ofbiological Activity?, Özlem İşcan, Reşi̇t Cemaloğlu, Nuran Asmafi̇li̇z, Zeynel Kiliç, Leyla Açik, Peli̇n Özbeden, Tuncer Hökelek

Turkish Journal of Chemistry

The Cl replacement reactions of hexachlorocyclotriphosphazene (trimer; N3 P3 Cl6) with sodium (N-benzyl)- aminopropanoxides (1 and 2) produced monospiro- (3 and 4), cis-, and trans-dispirocyclotriphosphazenes (13-16). The monospiro tetrakis-aminocyclotriphosphazenes (5-12) were obtained by the Cl substitutions of 3 and 4 with different secondary amines. The cis- (13 and 14) and trans-dispirophosphazenes (15 and 16) possessed 2 chiral P centers, and they were able to present meso and racemic forms, respectively. Moreover, the structures of compounds 5 and 14 were designated using X-ray data. The absolute configuration of compound 14 was found as SR in the solid state. Analytical and spectroscopic …

Chemosensor Properties Of 7-Hydroxycoumarin Substituted Cyclotriphosphazenes?, Gönül Yeni̇lmez Çi̇ftçi̇, Sergen Yilmaz, Nagi̇han Bayik, Eli̇f Şenkuytu, Esra Nur Kaya, Mahmut Durmuş, Mustafa Bulut

Turkish Journal of Chemistry

The newly synthesized cyclotriphosphazene cored coumarin chemosensors 5, 6, and 7 were successfully characterized by $^{1}$H NMR, $^{31}$P NMR, and MALDI-TOF mass spectrometry. Additionally, the photophysical and metal sensing properties of the targeted compounds were determined by fluorescence spectroscopy in the presence of various metals (Li$^{+}$, Na$^{+}$ , K$^{+}$ , Cs$^{+}$ , Mg2$^{+}$ , Ca2$^{+}$ , Ba2$^{+}$ , Cr3$^{+}$ , Mn2$^{+}$ , Fe3$^{+}$ , Co2$^{+}$ , Al3$^{+}$ , Hg$^{+}$ , Cu2$^{+}$ , Zn2$^{+}$ , Ag$^{+}$ , and Cd2$^{+}$) . The fluorescence titration results showed that compounds 5, 6, and 7 could be employed as fluorescent chemosensors for Fe3$^{+}$ ions with …

Nucleophilic Substitution Reactions Of Monofunctional Nucleophilic Reagents Withcyclotriphosphazenes Containing 2,2-Dioxybiphenyl Units, Esra Tanriverdi̇ Eçi̇k, Hani̇fe İbi̇şoğlu, Gönül Yeni̇lmez Çi̇ftçi̇, Gi̇zem Demi̇r, Eda Erdemi̇r, Fatma Yüksel

Turkish Journal of Chemistry

The nucleophilic substitution reactions of mono- and bis-spiro-2,2' -dioxybiphenyl cyclotriphosphazenes (3 and 4) with cyclopropanemethylamine (5) and aniline (6) were performed in the presence of trimethylamine in THF. Five novel cyclopropanemethylamino- and anilino-substituted spiro-2,2' -dioxybiphenyl cyclotriphosphazene derivatives (7-11) were obtained from these reactions. The molecular structures of the new cyclotriphosphazene derivatives (7- 11) were characterized by elemental analysis, MALDI-TOF MS, FT-IR, and NMR ( $^{31}$P and $^{1}$H) spectroscopies. The structure of the spiro-(2,2' -dioxybiphenyl)-bis-(anilino)-cyclotriphosphazene (11) was also determined by single-crystal X-ray crystallography.

Hearing Care And Management Priority Among Parents Of Children With Down Syndrome: A Grounded Theory, John J. Whicker, Karen F. Muñoz, Nicole J. Pearson, Trenton J. Landon, Lauri H. Nelson, Karl R. White, Michael P. Twohig

Communicative Disorders and Deaf Education Faculty Publications

Objective: This study qualitatively explored the factors that influence how parents of children who are Deaf or hard-of-hearing with Down syndrome prioritize hearing care and management and developed an associated theory to explain that priority.

Design: Grounded theory was used for the purposes of this qualitative study. Data were collected using in-depth interviews which were analyzed using a three-tiered qualitative coding process.

Study Sample: Eighteen mothers of children who are Deaf or hard-of-hearing with Down syndrome participated in this study.

Results: The higher the extent of engaged professional support, perception of benefit for child, parent activation, and family engagement, the …

Moderators And Processes Of Change In Traditional Exposure And Response Prevention (Erp) Versus Acceptance And Commitment Therapy-Informed Erp For Obsessive-Compulsive Disorder, Clarissa W. Ong, Shannon M. Blakey, Brooke M. Smith, Kate L. Morrison, Ellen J. Bluett, Jonathan S. Abramowitz, Michael P. Twohig

Psychology Faculty Publications

The present study evaluated moderators and processes of change in a randomized controlled trial comparing exposure and response prevention (ERP) delivered from a traditional framework versus ERP from an acceptance and commitment therapy framework (ACT+ERP) for obsessive-compulsive disorder (OCD). This paper presents baseline, weekly session, posttreatment, and follow-up data from the study. We examined (a) moderation effects of anxiety, depression, psychological inflexibility, and interpretation of intrusions and (b) the role of psychological inflexibility and interpretation of intrusions respectively as processes of change. Participants with less dysfunctional appraisals at pretreatment performed consistently better in ERP relative to ACT+ERP. In process analyses, …

A Randomized Dismantling Trial Of The Open And Engaged Components Of Acceptance And Commitment Therapy In An Online Intervention For Distressed College Students, Michael E. Levin, Jennifer Krafft, Elizabeth T. Hicks, Michael P. Twohig, Benjamin G. Pierce

Psychology Faculty Publications

This dismantling trial compared the effects of a full online Acceptance and Commitment Therapy (ACT) intervention to the isolated effects of the Open (i.e., acceptance, cognitive defusion) and Engaged (i.e., values, committed action) components of ACT. A sample of 181 distressed college students were randomized to one of four conditions: a 12-session full ACT website (Full), a version targeting the Open components (Open), a version targeting the Engaged components (Engaged), or waitlist. Participants in active conditions were also randomized to receive phone coaching or just email prompts to increase program adherence. All three ACT conditions significantly improved over time relative …

Implementing A Web-Based Cognitive Defusion Program To Target Negative Self-Referential Thoughts In College Students: A Pilot Study, Clarie-Ann Henriques Wollach, Leeann Cardaciotto, Michael E. Levin, Sharon Lee Armstrong

Psychology Faculty Publications

Cognitive defusion may enhance healthy coping with negative self-referential thoughts amongst college students. However, research is needed to examine how to effectively introduce and teach defusion to this population. The current pilot study tested the usability of and satisfaction with the D-FUSE program, a single-session, web-based program for a mixed sample of undergraduates and its effectiveness in producing improvements in cognitive defusion and self-criticism. In an undergraduate sample (N = 141), the D-FUSE program was found to be usable and satisfactory. Program engagement rendered significant reductions in the believability of and emotional discomfort produced by negative self-referential thoughts. Further improvements …

An Examination Of The Relationship Between Perfectionism And Neurological Functioning, Julie M. Petersen, Clarissa W. Ong, Allison S. Hancock, Ronald B. Gillam, Michael E. Levin, Michael P. Twohig

Psychology Faculty Publications

Clinical perfectionism is the rigid pursuit of high standards, interfering with functioning. Little research has explored neural patterns in clinical perfectionism. The present study explores neural correlates of clinical perfectionism, before and after receiving ten 50-minute, weekly sessions of acceptance and commitment therapy (ACT), as compared to low-perfectionist controls, in specific cortical structures: the dorsolateral prefrontal cortex (DLPFC), medial prefrontal cortex (MPFC), right inferior parietal lobule (IPL). Participants in the perfectionist condition (n = 43) were from a randomized controlled trial evaluating ACT for clinical perfectionism and low-perfectionist controls were undergraduate students (n = 12). Participants completed three tasks (editing …

A Preliminary Investigation Of The Effect Of Acceptance And Commitment Therapy On Neural Activation In Clinical Perfectionism, Clarissa W. Ong, Allison S. Hancock, Tyson S. Barrett, Eric B. Lee, Nicholas Wan, Ronald B. Gillam, Michael E. Levin, Michael P. Twohig

Psychology Faculty Publications

Clinical perfectionism is associated with various cognitive processes including performance monitoring and emotion regulation. This exploratory study analyzed neurological data from a randomized controlled trial for clinical perfectionism that compared acceptance and commitment therapy (ACT) to a waitlist control. The objective was to assess the effect of ACT on neural activation. Twenty-nine participants underwent a functional near-infrared spectroscopy assessment during which they completed behavioral tasks designed to elicit error detection and error generation at pre- and posttreatment. The hemodynamic response function (HRF) in the dorsolateral prefrontal cortex, dorsomedial prefrontal cortex, and right inferior parietal lobe was analyzed using mixed effects …

A Crucial Aspect Of National Security In Need Of Reform: Section 702 Of The Fisa Amendments Act, Stephen Gemar

South Dakota Law Review

No abstract provided.

Joint Dedication To Professor Emeritus Frank Pommersheim & Justice Steven L. Zinter, Matthew L.M. Fletcher, Alex M. Hagen, Chris Hutton, Michael Mckey, Danelle Mcquilen, Stephanie E. Pochop, Angela R. Riley, Michael P. Roche, Mark Barnett, Ronald A. Parsons Jr., Bobbi J. Rank, Charles P. Schroyer, Lori S. Wilbur

South Dakota Law Review

No abstract provided.

The Life And Legal Legacy Of Justice Steven L. Zinter, Neil Fulton

South Dakota Law Review

No abstract provided.

A Statistical Analysis Of Trans-Resveratrol In Grape Cane From Ten Varieties Of Cultivated Wine Grapes (Vitus Spp.), Harold Rathburn, Peter Bell, Scott Cook, Darrell D. Mayberry, Emryse Geye, Ryann Goodrich

Chemistry Faculty Publications and Presentations

trans-Resveratrol (resveratrol) has been shown to have various health benefits. As a consequence, there is an effort to determine plentiful sources of this molecule. Certain plants, such as grapes, synthesize resveratrol and therefore appear to be an excellent source of this chemical. Annual pruning of grapevine yields significant amounts of cane material that is normally mulched or simply burned. Previous studies have shown this grape cane to contain economically useful resveratrol. Texas is the seventh largest producer of grapes in the USA with over 162 ha currently under cultivation. As a result it is estimated that more than $3.2 …

Pass The Faa Drone Pilot Test—Remote Pilot Exam Preparation 2020, Nicolas R. Malloy

Textbooks and Manuals Series

Part 107 is the subdivision of Subchapter F of Chapter 1 of Title 14 that pertains to small unmanned aircraft systems (sUAS). To legally fly a small unmanned aircraft for non-hobby, non-recreational use, remote pilots must abide by these regulations. This book is intended to explain the Part 107 regulations in a short and easy to read format. Additionally, this book also covers other areas of knowledge required by the FAA, including airspace and requirements, weather, loading and performance, and operations. Readers also have access to a series of sample test questions. Because the FAA does not provide specific test-questions …

Design, Construction And Testing Of A 3-Component Force Balance For Educational Wind Tunnels In Undergraduate Aerodynamics, Milan Tomin, Marco Scipioni, Benjamin Gatti

Journal of Aviation/Aerospace Education & Research

This article is focused on providing detailed instructions on how to build and use a force balance for educational wind tunnels. The article’s objective is to encourage undergraduate students in underfunded programs to engage in the field of aerodynamics. The discussed force balance represents an affordable device that only requires basic components like Arduino board, a servo motor, and acrylic and aluminum as construction materials. A simple data collection example is included at the end of the article showing that this simple force balance can collect meaningful data about lift, drag, and moment coefficient of a tested airfoil.