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Journal articles on the topic 'FTACV'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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Elbaz, Lior, and Rifael Z. Snitkoff-Sol. "(Invited) Elucidating the Electrochemically Active Site Density of PGM-Free ORR Catalysts in Situ Fuel Cells Using Fourier Transform Alternating Current Voltammetry." ECS Meeting Abstracts MA2022-01, no. 49 (July 7, 2022): 2059. http://dx.doi.org/10.1149/ma2022-01492059mtgabs.

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The rising interest in polymer electrolyte fuel cell (PEFC) technology, part of the global shift in energy production to clean sources, is accompanied by efforts to drive down the cost of this technology, which focus primarily on the cathode catalyst, the most expensive PEFC component. While platinum-group metals (PGMs) continues to be the materials of choice for oxygen reduction reaction (ORR) catalysts, use of these materials in PEFCs must be significantly reduced or eliminated without a penalty in the overall cell performance for PEFC technology to become fully viable. The most promising class ORR catalysts that do not utilize PGMs (i.e., PGM-free catalysts), involve first-row transition metals, such as iron and cobalt incorporated in a nitrogen-doped carbon (M-N-C catalysts). While advancements in M-N-C activity have been impressive, the much sought-after improvement in durability has been impeded by limited information on changes in the PGM-free catalyst active site density, activity and its degradation rate during fuel cell testing. Currently, degradation of PGM-free catalysts during fuel cell operation is often quantified using the low-current region of polarization curves. While this approach is well established, it neglects complications from such factors as catalyst pore structure, membrane conductivity, ionomer content, nature of the support, and the inhomogeneity of active sites. Hence, there exists a critical need for a method with high specificity towards catalytic activity. In this presentation we will report for the first time on the use of Fourier-transform alternating current voltammetry (FTacV) as an electrochemical method for accurately quantifying the electrochemically active site density of PGM-free ORR catalysts and following their degradation in situ during operation of polymer electrolyte fuel cells. Using this method, we were able to detect changes in performance of electrochemically active species (electrocatalytic centers in this case), allowing us to calculate the electrochemical active site density (EASD) for the first time, which is necessary to elucidate the degradation mechanisms of PGM-free ORR catalysts that occur in situ fuel cells. large-amplitude FTacV, a well-established electrochemical method with distinct advantages over dc methods, was utilized to quantify the electrochemically active site density of PGM-free FeNC catalysts in situ in PEFC. First, we will demonstrate that an accurate measurement of the EASD can be made using this method. To further emphasize the strength of the technique, we will present our findings during degradation of commercial FeNC catalysts in operating PEFC. The peak currents from higher harmonics produced by this method are correlated to the fuel cell performance, and decrease after durability tests in a manner that indicates EASD loss may not be the only catalyst degradation mechanism, thus inviting further studies of yet-unknown degradation pathway(s).

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Zouraris, D., S. Kiafi, A. Zerva, E. Topakas, and A. Karantonis. "FTacV study of electroactive immobilized enzyme/free substrate reactions: Enzymatic catalysis of epinephrine by a multicopper oxidase from Thermothelomyces thermophila." Bioelectrochemistry 134 (August 2020): 107538. http://dx.doi.org/10.1016/j.bioelechem.2020.107538.

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Elbaz, Lior, and Ariel Friedman. "Fourier Transform Alternating Current Voltammetry (FTacV) As a Tool for in-Operando Study of PGM-Free ORR Catalysts' Durability in Pemfcs." ECS Meeting Abstracts MA2020-02, no. 33 (November 23, 2020): 2172. http://dx.doi.org/10.1149/ma2020-02332172mtgabs.

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Barry-Walsh, Justin, David V. James, and Paul E. Mullen. "Fixated Threat Assessment Centers: preventing harm and facilitating care in public figure threat cases and those thought to be at risk of lone-actor grievance-fueled violence." CNS Spectrums 25, no. 5 (April 7, 2020): 630–37. http://dx.doi.org/10.1017/s1092852920000152.

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The rediscovery of the importance of mental illness in the risk assessment and management of those who threaten, approach, and harm public figures has led to a new way of dealing with those that threaten public figures. This approach emphasises the role of “fixation” which may be defined as an intense preoccupation pursued to an abnormally intense degree. It integrates a threat assessment paradigm with the literature on stalking. The need for such an approach was highlighted in research on the prevalence of harassment of public figures. Psychiatry has a key role in this approach which sees mental health clinicians and Police work together in Fixated Threat Assessment Centres (FTACs). An FTAC functions by assessing the level of concern and sharing information to facilitate interventions that are often mental health based. The purpose is not the hopeless task of identifying those who will go on to perpetrate serious violence, rather to intervene in the group they emerge from, to prevent harm. As well as decreasing risk to the persons fixated upon, this approach improves care to the mentally disordered people who harass and threaten them and, in doing so, decreases the likelihood of their criminalization while enhancing their quality of life. As expertise in the area has grown, policing and security agencies in several countries have expanded the FTAC model to cover individuals thought at risk of lone-actor grievance-fueled violence, a term that captures both different forms of mass killing and lone actor terrorism.

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Byness, Aschalew Ashagre. "Tax Appeal Proceedings before the Federal Tax Appeal Commission in Ethiopia: Critical Reflections." Mizan Law Review 14, no. 2 (December 31, 2020): 201–38. http://dx.doi.org/10.4314/mlr.v14i2.2.

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Under the 2016 Federal Tax Administration Proclamation (FTAP), it is by way of appeal that taxpayers reach the judiciary when they can show that the Federal Tax Appeal Commission (FTAC) has committed an error of law. As far as factual issues are concerned, the decision of the FTAC is thus final and conclusive. Ethiopia’s tax dispute resolution system has made improvements although there has been discontent on the part of taxpayers. This article examines the tax appeal processes at the federal level to see whether the processes enhance fair play between taxpayers and the tax authority. Specifically, the article evaluates whether there are clear and adequate procedural rules that ensure access to justice for aggrieved taxpayers and fair treatment by the Federal Tax Appeal Commission (FTAC). I argue that although there have been certain improvements made by the FTAP (as far as administrative appeal before the FTAC is concerned), there are still some critical shortcomings that have to be reconsidered.

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., Syed KashifHussain. "WEIGHT OPTIMIZATION OF FTAC SECONDARY STRUCTURE OF AN AIRCRAFT." International Journal of Research in Engineering and Technology 05, no. 08 (August 25, 2016): 238–44. http://dx.doi.org/10.15623/ijret.2016.0508042.

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Hiss, Michele Daniela Borges Santos, Victor Ribeiro Neves, Flávio Cantarelli Hiss, Ester Silva, Audrey Borghi e. Silva, and Aparecida Maria Catai. "Segurança da intervenção fisioterápica precoce após o infarto agudo do miocárdio." Fisioterapia em Movimento 25, no. 1 (March 2012): 153–63. http://dx.doi.org/10.1590/s0103-51502012000100015.

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INTRODUÇÃO: A fisioterapia na fase I da reabilitação cardiovascular (FTCV) pode ser iniciada de 12 a 24 horas após o infarto agudo do miocárdio (IAM), no entanto, é comum o repouso prolongado no leito em razão do receio de instabilização do paciente. OBJETIVOS: Avaliar as respostas autonômicas e hemodinâmicas de pacientes pós-IAM submetidos ao primeiro dia de protocolo de FTCV fase I, bem como sua segurança. MATERIAIS E MÉTODOS: Foram estudados 51 pacientes com primeiro IAM não complicado, 55 ± 11 anos, 76% homens. Foram submetidos ao primeiro dia do protocolo de FTCV fase I, em média 24 horas pós-IAM. A frequência cardíaca (FC) instantânea e os intervalos R-R do ECG foram captados pelo monitor de FC (Polar®S810i) e a pressão arterial (PA) aferida pelo método auscultatório. A variabilidade da FC foi analisada nos domínios do tempo (RMSSD e RMSM dos iR-R em ms) e da frequência. A densidade espectral de potência foi expressa em unidades absolutas (ms²/Hz) e normalizada (un) para as bandas de baixa (BF) e alta frequência (AF) e pela razão BF/AF. RESULTADOS: O índice RMSSD, a AF e a AFun apresentaram redução na execução dos exercícios em relação ao repouso pré e pós-exercício (p < 0,05), a BFun e a razão BF/AF aumentaram (p < 0,05). A FC e a PA sistólica apresentaram aumento durante a execução dos exercícios em relação ao repouso (p < 0,05). Não foi observado qualquer sinal e/ou sintoma de intolerância ao esforço. CONCLUSÕES: O exercício realizado foi eficaz, pois promoveu alterações hemodinâmicas e na modulação autonômica nesses pacientes, sem ocasionar qualquer intercorrência clínica.

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Thunsiri, Kittiya, Siwasit Pitjamit, Peraphan Pothacharoen, Dumnoensun Pruksakorn, Wasawat Nakkiew, and Wassanai Wattanutchariya. "The 3D-Printed Bilayer’s Bioactive-Biomaterials Scaffold for Full-Thickness Articular Cartilage Defects Treatment." Materials 13, no. 15 (August 3, 2020): 3417. http://dx.doi.org/10.3390/ma13153417.

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The full-thickness articular cartilage defect (FTAC) is an abnormally severe grade of articular cartilage (AC) injury. An osteochondral autograft transfer (OAT) is the recommended treatment, but the increasing morbidity rate from osteochondral plug harvesting is a limitation. Thus, the 3D-printed bilayer’s bioactive-biomaterials scaffold is of major interest. Polylactic acid (PLA) and polycaprolactone (PCL) were blended with hydroxyapatite (HA) for the 3D-printed bone layer of the bilayer’s bioactive-biomaterials scaffold (B-BBBS). Meanwhile, the blended PLA/PCL filament was 3D printed and combined with a chitosan (CS)/silk firoin (SF) using a lyophilization technique to fabricate the AC layer of the bilayer’s bioactive-biomaterials scaffold (AC-BBBS). Material characterization and mechanical and biological tests were performed. The fabrication process consists of combining the 3D-printed structure (AC-BBBS and B-BBBS) and a lyophilized porous AC-BBBS. The morphology and printing abilities were investigated, and biological tests were performed. Finite element analysis (FEA) was performed to predict the maximum load that the bilayer’s bioactive-biomaterials scaffold (BBBS) could carry. The presence of HA and CS/SF in the PLA/PCL structure increased cell proliferation. The FEA predicted the load carrying capacity to be up to 663.2 N. All tests indicated that it is possible for BBBS to be used in tissue engineering for AC and bone regeneration in FTAC treatment.

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Adolphsen, Caroline. "Use of Force in Somatic Treatment of Adults in Denmark." European Journal of Health Law 26, no. 4 (October 4, 2019): 331–47. http://dx.doi.org/10.1163/15718093-12264433.

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Abstract The article provides a critical analysis of the new Danish Act on Use of Force in Somatic Treatment of Adults with a Permanently Impaired Ability to Give Consent (FTAC, Act no. 655 of 8 June 2017), which covers adults unable to give an informed consent. The rules in the Act are included in the legal framework governing medical treatment with and without consent in Denmark, and the article draws on international human rights in connection with the subject matter. The aim of the article is also to highlight the grey areas that still exist despite the new rules and to provide legal argumentation for solutions to the issues that can arise in these legal grey areas.

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Wilson, Simon, Frank Farnham, Alice Taylor, and Richard Taylor. "Reflections on working in public-figure threat management." Medicine, Science and the Law 59, no. 4 (August 28, 2019): 275–81. http://dx.doi.org/10.1177/0025802419861168.

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The Fixated Threat Assessment Centre (FTAC) manages the risk posed to public figures by fixated individuals by paying attention to their correspondence and approaches and liaising with the mental health and criminal justice agencies responsible for their management. This paper offers a narrative reflection on the clinical experience of this unusual work. The clinical population is significantly different from that seen in mainstream mental health services, with a preponderance of delusional disorders and paraphrenias. The interface with mental health and criminal justice systems around the UK and internationally also offers a unique perspective on the functioning and malfunctioning of these services, and we attempt to describe and make sense of these experiences.

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Ghosh, Kanjaksha. "Fast Track Anaemia Clinic (FTAC) and Intravenous Iron Administration: Its Relevance and Application Today in India." Indian Journal of Hematology and Blood Transfusion 34, no. 2 (October 13, 2017): 343–44. http://dx.doi.org/10.1007/s12288-017-0878-9.

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Lorton, Orane, Pauline C. Guillemin, Ryan Holman, Stéphane Desgranges, Laura Gui, Lindsey A. Crowe, Sylvain Terraz, et al. "Enhancement of HIFU thermal therapy in perfused tissue models using micron-sized FTAC-stabilized PFOB-core endovascular sonosensitizers." International Journal of Hyperthermia 37, no. 1 (January 1, 2020): 1116–30. http://dx.doi.org/10.1080/02656736.2020.1817575.

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Johnson, SA, Y. Kalairajah, P. Moonot, N. Steele, and RE Field. "Fast-Track Aassessment Clinic: Selection of Patients for a One-Stop Hip Assessment Clinic." Annals of The Royal College of Surgeons of England 90, no. 3 (April 2008): 208–12. http://dx.doi.org/10.1308/003588408x242024.

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INTRODUCTION The fast-track assessment clinic (FTAC) is a process to select patients who are very likely to require primary total hip replacement. Selected patients can then be seen in a one-off clinic reducing the number of hospital visits, cost to primary care trusts and delay between referral and treatment. PATIENTS AND METHODS Fifty patients on the waiting list for hip replacement were analysed to see if there were common parameters that led to their inclusion. From these data, fast-track selection criteria (FTSCs) were generated. These FTSCs were used to make a dual comparison of outcomes between 52 patients seen in a traditional clinic. Finally, a pilot study was conducted in which patients fulfilling FTSCs were seen in a designated clinic. RESULTS An Oxford hip score (OHS) of 34 and above combined with severe loss of joint space, severe marginal osteophytes, or both was common to most patients on the waiting list (84%). FTSCs correctly predicted the outcome of the orthopaedic clinic in 38 patients out of a total of 52. During the pilot stage, positive FTSCs were shown to have a positive predictive value of 92% for joint replacement being carried out and a negative predictive value of 46%. CONCLUSIONS An OHS of 34 or above combined with complete loss of joint space and/or severe marginal osteophyte formation can be used to select patients who are very likely to need total hip replacement. These patients can be seen in a clinic that combines assessment of surgical indication with medical fitness for surgery.

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Dale-Evans, Alister R., Martin J. Robinson, Henry O. Lloyd-Laney, David J. Gavaghan, Alan M. Bond, and Alison Parkin. "A Voltammetric Perspective of Multi-Electron and Proton Transfer in Protein Redox Chemistry: Insights From Computational Analysis of Escherichia coli HypD Fourier Transformed Alternating Current Voltammetry." Frontiers in Chemistry 9 (June 14, 2021). http://dx.doi.org/10.3389/fchem.2021.672831.

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This paper explores the impact of pH on the mechanism of reversible disulfide bond (CysS-SCys) reductive breaking and oxidative formation in Escherichia coli hydrogenase maturation factor HypD, a protein which forms a highly stable adsorbed film on a graphite electrode. To achieve this, low frequency (8.96 Hz) Fourier transformed alternating current voltammetric (FTACV) experimental data was used in combination with modelling approaches based on Butler-Volmer theory with a dual polynomial capacitance model, utilizing an automated two-step fitting process conducted within a Bayesian framework. We previously showed that at pH 6.0 the protein data is best modelled by a redox reaction of two separate, stepwise one-electron, one-proton transfers with slightly “crossed” apparent reduction potentials that incorporate electron and proton transfer terms (Eapp20 > Eapp10). Remarkably, rather than collapsing to a concerted two-electron redox reaction at more extreme pH, the same two-stepwise one-electron transfer model with Eapp20 > Eapp10 continues to provide the best fit to FTACV data measured across a proton concentration range from pH 4.0 to pH 9.0. A similar, small level of crossover in reversible potentials is also displayed in overall two-electron transitions in other proteins and enzymes, and this provides access to a small but finite amount of the one electron reduced intermediate state.

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"From the AOU Check-list Committee." Auk 124, no. 4 (2007): 1472. http://dx.doi.org/10.1642/0004-8038(2007)124[1472:ftacc]2.0.co;2.

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