135 results on '"Ahmadi, Y."'
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2. Scalar spinor fields interaction in de Sitter ambient space formalism
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Ahmadi, Y., Jalilifard, F., and Takook, M. V.
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General Relativity and Quantum Cosmology ,81T20 ,J.2 - Abstract
In de Sitter ambient space formalism, the massless minimally coupled scalar field can be constructed from a massless conformally coupled scalar field and a constant five-vector $A^{\alpha}$. Also, a constant five-vector $B^{\alpha}$ appears in the interaction Lagrangian of massless minimally coupled scalar and spinor fields in this formalism. These constant five-vector fields can be fixed in the interaction case in the null curvature limit. Here we will calculate the $\cal S$ matrix elements of scalar-spinor fields interaction in the tree level approximation. Then the constant five-vectors $A^{\alpha}$ and $B^{\alpha}$, will be fixed by comparing the $\cal S$ matrix elements in the null curvature limits with the Minkowskian counterparts., Comment: 10 pages, 1 figure
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- 2021
- Full Text
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3. Electron-photon interaction in de Sitter ambient space formalism
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Jalilifard, F., Ahmadi, Y., and Takook, M. V.
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General Relativity and Quantum Cosmology ,81T20 ,J.2 - Abstract
The electron-photon interaction (the spinor-vector field interaction) in the de Sitter ambient space formalism is investigated in the first (leading order) approximation. The interaction Lagrangian and the scattering matrix are presented. In this approximation, the scattering matrix can be written as a expansion of the interaction Lagrangian. The tree-diagram of electron-photon scattering amplitude is calculated. Finally the Minkowski limit is considered., Comment: 10 pages, 1 figure
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- 2021
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4. De Sitter scalar-spinor interaction in Minkowski limit
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Ahmadi, Y.
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General Relativity and Quantum Cosmology ,81T20 ,J.2 - Abstract
The scalar-spinor interaction Lagrangian is presented by the Yukawa potential. In dS ambient space formalism, the interaction Lagrangian of scalar-spinor fields was obtained from a new transformation which is very similar to the guage theory. The interaction of massless minimally coupled scalar and spinor fields was investigated. The Minkowski limit of the massless minimally coupled scalar field and massive spinor field interaction in the ambient space formalism of de Sitter space time is calculated. The interaction Lagrangian and massless minimally coupled scalar field in the null curvature limit become zero and the local transformation in the null curvature limit become a constant phase transformation and the interaction in this limit become zero. The covariant derivative reduces to ordinary derivative too. Then we conclude that this interaction is due to the curvature of space time and then the massless minimally coupled scalar field may be a part of a gravitational field., Comment: 5 pages
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- 2021
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5. Photon decaying in de Sitter universe
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Ahmadi, Y. and Takook, M. V.
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- 2019
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6. An assessment of Gulf States' perceptions of US hegemony and security in the Persian/Arabian Gulf
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Ahmadi, Y. A.
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300 - Abstract
This thesis assesses the Gulf states’ perceptions towards US hegemony security in the Persian/Arabian Gulf. A number of questions are asked regarding security and stability in the Gulf, the tools, means and objectives of the USA in the region, regional powers and their role in achieving stability in the Gulf. Special references is given to the perspectives of the Gulf Cooperation Council (GCC) states, Iraq and Iran regarding regional security, stability, the role of US hegemony, and their roles in building a new security system in the region. Moreover questions addressed include the occupation of Iraq by the USA and how it has impacted the Gulf region and the capabilities of the Gulf states to build a regional security system independent of US protection. The aim of this study is to provide a conceptual foundation for a discussion about the future shape of security and stability arrangements in the Gulf. Secondly, this research aims to analyse the role of the USA in the regional security complex, its key interests in the region, and its means to achieving its objectives there. Finally, this thesis examines the perceptions of the GCC states, Iraq and Iran toward the role of the USA and its hegemony in the Gulf. Furthermore, this research project also aims to study the failure of the region's states to develop a regional security regime and their perceptions of this failure. The Persian/Arabian Gulf is a strategic economic, political and military region that has increased its vital significance to neighbouring regions and the world as a whole in the past two decades or more. In particular its important position as a source of gas and oil for the global energy market has caused this region to be of interest to state and non-state actors around the world, and arguably has made the region more unstable. The hypothesis tested in this work is, that consider the importance of the Gulf states perception of the security and stability and the US hegemony and its role, as the only possible way to stabilize the region. as well as considering the Gulf states perception of protect themselves and build their own regional security system. That the USA has succeeded to a great extent in controlling and exercising hegemony over the Persian/Arabian Gulf region in a way compatible with its interests and objectives, which are: primarily, guaranteeing the flow of oil and gas, protecting current regimes in the GCC and guaranteeing the security and supremacy of Israel. The originality of this thesis in part lies in focus on the Gulf states’ perceptions of US hegemony in the Gulf and its impact on security there., By employing a constructivist approach and combining it with a theory of Hegemonic Stability, an alternative understanding of the capabilities of the USA as hegemonic state in the Gulf is developed to examine its ability to control and gain support from states in the Gulf.
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- 2014
7. Comparison of physicochemical, microbial and sensory properties of Huso huso fillets smoked and flavored with brine and sauce for 30 days in the refrigerator
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B. Latifi; M. Ahmadi; Y. Etemadian; V. Ghaemi; S.J. Abolghasemi; A.R. Shaviklo
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Hot smoking ,Flavored ,Fillet ,Cultured H. huso ,Shelf life ,Agriculture ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
In the present study, the physicochemical, microbial and sensory changes of Huso huso fillets smoked and flavored with brine and sauce for 30 days in the refrigerator were investigated. For this purpose, H.huso was filleted after harvesting and preparation. The fillets were immersed in saturated brine with a concentration of 6.34% NaCl and the sauce for one hour and smoked by hot smoky machine. Then, the samples were packed and stored for 30 days at refrigerator. The results showed that the percentage of protein in the smoked and flavored with sauce (32.28-32.32%) were higher than the brine treatment (27.84-28.29%), and there was a significant difference between TBA and TVB-N (p0.05). The amount of total bacteria and coliform was negative during the period; but, mold was observed in both samples of smoked and flavored with brine (8 colonies per ml sample) and sauce (6 colonies per ml sample) at the end of storage period. The sensory evaluation results indicate that the both samples were not significantly different in terms of packaging. Therefore, based on sensory and microbiological evaluations, the shelf-life of hot smoked and flavored fillets with brine and sauce was 20 days in usual packages.
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- 2019
8. Fish length estimation of free-swimming grouper in the cage culture using Underwater Televisual System (UTS), De-haze water correction, and deep learning methods.
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Ahmadi, Y, Jaya, I, Rahmat, A, and Iqbal, M
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- 2023
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9. Three decades after Baby Doe: how neonatologists and bioethicists conceptualize the Best Interests Standard
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Placencia, F X, Ahmadi, Y, and McCullough, L B
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- 2016
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10. Investigating the Relationship between Demographic Characteristics and Life Style of Medical University Students in a Military Medical University
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Asadzandi. M, Ahmadi. Y, Sepandi. M, and Babatabar H
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Medical education ,Life style ,General Engineering ,Psychology - Published
- 2020
11. The effects of Ramadan fasting on endothelial function in patients with cardiovascular diseases
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Yousefi, B., Faghfoori, Z., Samadi, N., Karami, H., Ahmadi, Y., Badalzadeh, R., Shafiei-Irannejad, V., Majidinia, M., Ghavimi, H., and Jabbarpour, M.
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Cardiovascular diseases -- Demographic aspects ,Cardiac patients -- Food and nutrition ,Fasting -- Health aspects ,Food/cooking/nutrition ,Health - Abstract
BACKGROUND/OBJECTIVES: Endothelial dysfunction, which can be manifested by loss of nitric oxide bioavailability, is an increasingly recognized cause of cardiovascular diseases. Previous studies showed that diets affect endothelial function and modify cardiovascular risks. This study aimed to assess the effects of Ramadan fasting, as a diet intervention, on endothelial function. SUBJECTS/METHODS: The study population consisted of 21 male patients (mean age: 52[+ or -]9 years) with cardiovascular risks (coronary artery disease, cerebrovascular or peripheral arterial diseases). The biochemical variables in serum of patients were measured 2 days before and after Ramadan fasting. The levels of asymmetric dimethylarginine (ADMA) and vascular endothelial growth factor (VEGF) were evaluated using the enzyme-linked immunosorbent assay. Nitric oxide (NO) and Malondialdehyde (MDA) levels were measured by the Griess and thiobarbituric acid reaction substances assay, respectively. RESULTS: NO levels in patients after Ramadan fasting were significantly higher compared with the baseline value (85.1 [+ or -]11.54 vs 75.8 [+ or -]10.7 [micro]mol/l) (P < 0.05). Post-Ramadan levels of ADMA decreased significantly in comparison with pre-Ramadan levels (802.6 [+ or -] 60.9 vs 837.6 [+ or -] 51.0 nmol/l) (P < 0.05). In addition, the levels of VEGF and MDA changed during Ramadan fasting, but these changes were not statistically significant (228.1 [+ or -] 27.1 vs 222.7 [+ or -] 22.9 pg/ml and 3.2 [+ or -]0.7 vs 3.6 [+ or -]1.1 [micro]mol/l, respectively). CONCLUSIONS: Ramadan fasting may have beneficial effects on endothelial function and can modulate cardiovascular risks. Further studies are needed to confirm the clinical significance of Ramadan fasting on cardiovascular health. doi:10.1038/ejcn.2014.61;published online 23 April 2014, INTRODUCTION Ramadan is a lunar month during which Muslims are prescribed fasting for moral and spiritual reasons. As more than one billion people worldwide believe in Islam, it is estimated [...]
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- 2014
12. Elective cancer surgery in COVID-19–Free surgical pathways during the SARS-cov-2 pandemic: An international, multicenter, comparative cohort study
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James C Glasbey, Dmitri Nepogodiev, Joana Ff Simoes, Omar Omar, Elizabeth Li, Mary L Venn, Mohammad Abou Chaar, Vita Capizzi, Daoud Chaudhry, Anant Desai, Jonathan G Edwards, Jonathan P Evans, Marco Fiore, Jose Flavio Videria, Samuel J Ford, Ian Ganyli, Ewen A Griffiths, Rohan R Gujjuri, Angelos G Kolias, Haytham Ma Kaafarani, Ana Minaya-Bravo, Siobhan C McKay, Helen M Mohan, Keith Roberts, Carlos San Miguel-Méndez, Peter Pockney, Richard Shaw, Neil J Smart, Grant D Stewart, Sudha Sundar, Raghavan Vidya, Aneel A Bhangu, James C Glasbey, Omar Omar, Aneel A Bhangu, Kwabena Siaw-Acheampong, Ruth A Benson, Edward Bywater, Daoud Chaudhry, Brett E Dawson, Jonathan P Evans, James C Glasbey, Rohan R Gujjuri, Emily Heritage, Conor S Jones, Sivesh K Kamarajah, Chetan Khatri, Rachel A Khaw, James M Keatley, Andrew Knight, Samuel Lawday, Elizabeth Li, Harvinder S Mann, Ella J Marson, Kenneth A McLean, Siobhan C McKay, Emily C Mills, Dmitri Nepogodiev, Gianluca Pellino, Maria Picciochi, Elliott H Taylor, Abhinav Tiwari, Joana Ff Simoes, Isobel M Trout, Mary L Venn, Richard Jw Wilkin, Aneel A Bhangu, James C Glasbey, Neil J Smart, Ana Minaya-Bravo, Jonathan P Evans, Gaetano Gallo, Susan Moug, Francesco Pata, Peter Pockney, Salomone Di Saverio, Abigail Vallance, Dale Vimalchandran, Ewen A Griffiths, Sivesh K Kamarajah, Richard Pt Evans, Philip Townend, Keith Roberts, Siobhan McKay, John Isaac, Sohei Satoi, John Edwards, Aman S Coonar, Adrian Marchbank, Edward J Caruana, Georgia R Layton, Akshay Patel, Alessandro Brunelli, Samuel Ford, Anant Desai, Alessandro Gronchi, Marco Fiore, Max Almond, Fabio Tirotta, Sinziana Dumitra, Angelos Kolias, Stephen J Price, Daniel M Fountain, Michael D Jenkinson, Peter Hutchinson, Hani J Marcus, Rory J Piper, Laura Lippa, Franco Servadei, Ignatius Esene, Christian Freyschlag, Iuri Neville, Gail Rosseau, Karl Schaller, Andreas K Demetriades, Faith Robertson, Alex Alamri, Richard Shaw, Andrew G Schache, Stuart C Winter, Michael Ho, Paul Nankivell, Juan Rey Biel, Martin Batstone, Ian Ganly, Raghavan Vidya, Alex Wilkins, Jagdeep K Singh, Dinesh Thekinkattil, Sudha Sundar, Christina Fotopoulou, Elaine Leung, Tabassum Khan, Luis Chiva, Jalid Sehouli, Anna Fagotti, Paul Cohen, Murat Gutelkin, Rahel Ghebre, Thomas Konney, Rene Pareja, Rob Bristow, Sean Dowdy, T S Shylasree, R Kottayasamy Seenivasagam, Joe Ng, Keiiji Fujiwara, Grant D Stewart, Benjamin Lamb, Krishna Narahari, Alan McNeill, Alexandra Colquhoun, John McGrath, Steve Bromage, Ravi Barod, Veeru Kasivisvanathan, Tobias Klatte, Joana Ff Simoes, Tom Ef Abbott, Sadi Abukhalaf, Michel Adamina, Adesoji O Ademuyiwa, Arnav Agarwal, Murat Akkulak, Ehab Alameer, Derek Alderson, Felix Alakaloko, Markus Albertsmeiers, Osaid Alser, Muhammad Alshaar, Sattar Alshryda, Alexis P Arnaud, Knut Magne Augestad, Faris Ayasra, José Azevedo, Brittany K Bankhead-Kendall, Emma Barlow, David Beard, Ruth A Benson, Ruth Blanco-Colino, Amanpreet Brar, Ana Minaya-Bravo, Kerry A Breen, Chris Bretherton, Igor Lima Buarque, Joshua Burke, Edward J Caruana, Mohammad Chaar, Sohini Chakrabortee, Peter Christensen, Daniel Cox, Moises Cukier, Miguel F Cunha, Giana H Davidson, Anant Desai, Salomone Di Saverio, Thomas M Drake, John G Edwards, Muhammed Elhadi, Sameh Emile, Shebani Farik, Marco Fiore, J Edward Fitzgerald, Samuel Ford, Tatiana Garmanova, Gaetano Gallo, Dhruv Ghosh, Gustavo Mendonça Ataíde Gomes, Gustavo Grecinos, Ewen A Griffiths, Madalegna GrÜndl, Constantine Halkias, Ewen M Harrison, Intisar Hisham, Peter J Hutchinson, Shelley Hwang, Arda Isik, Michael D Jenkinson, Pascal Jonker, Haytham Ma Kaafarani, Debby Keller, Angelos Kolias, Schelto Kruijff, Ismail Lawani, Hans Lederhuber, Sezai Leventoglu, Andrey Litvin, Andrew Loehrer, Markus W Löffler, Maria Aguilera Lorena, Maria Marta Modolo, Piotr Major, Janet Martin, Hassan N Mashbari, Dennis Mazingi, Symeon Metallidis, Ana Minaya-Bravo, Helen M Mohan, Rachel Moore, David Moszkowicz, Susan Moug, Joshua S Ng-Kamstra, Mayaba Maimbo, Ionut Negoi, Milagros Niquen, Faustin Ntirenganya, Maricarmen Olivos, Kacimi Oussama, Oumaima Outani, Marie Dione Parreno-Sacdalanm, Francesco Pata, Carlos Jose Perez Rivera, Thomas D Pinkney, Willemijn van der Plas, Peter Pockney, Ahmad Qureshi, Dejan Radenkovic, Antonio Ramos-De la Medina, Keith Roberts, April C Roslani, Martin Rutegård, Juan José Segura-Sampedro, Irène Santos, Sohei Satoi, Raza Sayyed, Andrew Schache, Andreas A Schnitzbauer, Justina O Seyi-Olajide, Neil Sharma, Richard Shaw, Sebastian Shu, Kjetil Soreide, Antonino Spinelli, Grant D Stewart, Malin Sund, Sudha Sundar, Stephen Tabiri, Philip Townend, Georgios Tsoulfas, Gabrielle H van Ramshorst, Raghavan Vidya, Dale Vimalachandran, Oliver J Warren, Duane Wedderburn, Naomi Wright, C Allemand, L Boccalatte, M Figari, M Lamm, J Larrañaga, C Marchitelli, F Noll, D Odetto, M Perrotta, J Saadi, L Zamora, C Alurralde, E L Caram, D Eskinazi, J P Mendoza, M Usandivaras, R Badra, A Esteban, J S García, P M García, J I Gerchunoff, S M Lucchini, M A NIgra, L Vargas, T Hovhannisyan, A Stepanyan, T Gould, R Gourlay, B Griffiths, S Gananadha, M McLaren, J Cecire, N Joshi, S Salindera, A Sutherland, J H Ahn, G Charlton, S Chen, N Gauri, R Hayhurst, S Jang, F Jia, C Mulligan, W Yang, G Ye, H Zhang, M Ballal, D Gibson, D Hayne, J Moss, T Richards, P Viswambaram, U G Vo, J Bennetts, T Bright, M Brooke-Smith, R Fong, B Gricks, Y H Lam, B S Ong, M Szpytma, D Watson, K Bagraith, S Caird, E Chan, C Dawson, D Ho, E Jeyarajan, S Jordan, A Lim, G J Nolan, A Oar, D Parker, H Puhalla, A Quennell, L Rutherford, P Townend, M Von Papen, M Wullschleger, A Blatt, D Cope, N Egoroff, M Fenton, J Gani, N Lott, P Pockney, N Shugg, M Elliott, D Phung, D Phan, D Townend, C Bong, J Gundara, A Frankel, S Bowman, G R Guerra, J Bolt, K Buddingh, N N Dudi-Venkata, S Jog, H M Kroon, T Sammour, R Smith, C Stranz, M Batstone, K Lah, W McGahan, D Mitchell, A Morton, A Pearce, M Roberts, G Sheahan, B Swinson, N Alam, S Banting, L Chong, P Choong, S Clatworthy, D Foley, A Fox, M W Hii, B Knowles, J Mack, M Read, A Rowcroft, S Ward, G Wright, M Lanner, I Königsrainer, M Bauer, C Freyschlag, M Kafka, F Messner, D Öfner, I Tsibulak, K Emmanuel, M Grechenig, R Gruber, M Harald, L Öhlberger, J Presl, A Wimmer, I Namazov, E Samadov, D Barker, R Boyce, S Corbin, A Doyle, A Eastmond, R Gill, A Haynes, S Millar, M O'Shea, G Padmore, N Paquette, E Phillips, S St John, K Walkes, N Flamey, P Pattyn, W Oosterlinck, J Van den Eynde, R Van den Eynde, A Gatti, C Nardi, R Oliva, R De Cicco, I Cecconello, P Gregorio, L Pontual Lima, U Ribeiro Junior, F Takeda, R M Terra, M Sokolov, B Kidane, S Srinathan, M Boutros, N Caminsky, G Ghitulescu, G Jamjoum, J Moon, J Pelletier, T Vanounou, S Wong, M Boutros, S Dumitra, A Kouyoumdjian, B Johnston, C Russell, M Boutros, S Demyttenaere, R Garfinkle, J Abou-Khalil, C Nessim, J Stevenson, F Heredia, A Almeciga, A Fletcher, A Merchan, L O Puentes, J Mendoza Quevedo, G Bacic, D Karlovic, D Krsul, M Zelic, I Luksic, M Mamic, B Bakmaz, I Coza, E Dijan, Z Katusic, J Mihanovic, I Rakvin, K Frantzeskou, N Gouvas, G Kokkinos, P Papatheodorou, I Pozotou, O Stavrinidou, A Yiallourou, L Martinek, M Skrovina, I Szubota, J Žatecký, V Javurkova, J Klat, T Avlund, P Christensen, J L Harbjerg, L H Iversen, D W Kjaer, Hø Kristensen, M Mekhael, A L Ebbehøj, P Krarup, N Schlesinger, H Smith, A Abdelsamed, A Y Azzam, H Salem, A Seleim, A Abdelmajeed, M Abdou, N E Abosamak, M Al Sayed, F Ashoush, R Atta, E Elazzazy, M Elhoseiny, M Elnemr, M S Elqasabi, M E Elsayed Hewalla, I Elsherbini, E Essam, M Eweda, I Ghallab, E Hassan, M Ibrahim, M Metwalli, M Mourad, M S Qatora, M Ragab, A Sabry, H Saifeldin, M Saleh Mesbah Mohamed Elkaffas, A Samih, A Samir Abdelaal, S Shehata, K Shenit, D Attia, N Kamal, N Osman, A M Abbas, Has Abd Elazeem, M M Abdelkarem, S Alaa, A K Ali, A Ayman, M G Azizeldine, H Elkhayat, S M Elghazaly, F A Monib, M A Nageh, M M Saad, M Salah, M Shahine, E A Yousof, A Youssef, A Eldaly, M ElFiky, A Nabil, G Amira, I Sallam, M Sherief, A Sherif, A Abdelrahman, H Aboulkassem, G Ghaly, R Hamdy, A Morsi, H Salem, G Sherif, H Abdeldayem, I Abdelkader Salama, M Balabel, Y Fayed, A E Sherif, D Bekele, J Kauppila, E Sarjanoja, O Helminen, H Huhta, J H Kauppila, C Beyrne, L Jouffret, L Lugans, L Marie-Macron, E Chouillard, B De Simone, J Bettoni, S Dakpé, B Devauchelle, N Lavagen, S Testelin, S Boucher, R Breheret, A Gueutier, A Kahn, J KÜn-Darbois, A Barrabe, Z Lakkis, A Louvrier, S Manfredelli, P Mathieu, A Chebaro, V Drubay, M El Amrani, C Eveno, K Lecolle, G Legault, L Martin, G Piessen, F R Pruvot, S Truant, P Zerbib, Q Ballouhey, B Barrat, J Laloze, H Salle, A Taibi, J Usseglio, D Bergeat, A Merdrignac, Roy B Le, L O Perotto, A Scalabre, A Aimé, A Ezanno, B Malgras, P Bouche, S Tzedakis, E Cotte, O Glehen, V Kepenekian, J Lifante, G Passot, A D'Urso, E Felli, D Mutter, P Pessaux, B Seeliger, J Bardet, R Berry, G Boddaert, S Bonnet, E Brian, C Denet, D Fuks, D Gossot, M Grigoroiu, A Laforest, Y Levy-Zauberman, C Louis-Sylvestre, A Moumen, G Pourcher, A Seguin-Givelet, E Tribillon, E Duchalais, F Espitalier, C Ferron, O Malard, U Bork, M Distler, J Fritzmann, J Kirchberg, C Praetorius, C Riediger, J Weitz, T Welsch, P Wimberger, K Beyer, C Kamphues, J Lauscher, F N Loch, C Schineis, M Albertsmeier, M Angele, A Kappenberger, H Niess, T Schiergens, J Werner, R Becker, J Jonescheit, I Pergolini, D Reim, C Boeker, I Hakami, J Mall, P Liokatis, W Smolka, K Nowak, T Reinhard, F Hölzle, A Modabber, P Winnand, M Knitschke, P Kauffmann, S Wolfer, J Kleeff, K Lorenz, C Michalski, U Ronellenfitsch, R Schneider, E Bertolani, A Königsrainer, M W Löffler, M Quante, C Steidle, L ÜberrÜck, C Yurttas, C S Betz, J Bewarder, A Böttcher, S Burg, C Busch, M Gosau, A Heuer, J Izbicki, T O Klatte, D Koenig, N Moeckelmann, C Nitschke, M Priemel, R Smeets, U Speth, S Thole, F G Uzunoglu, T Vollkommer, N Zeller, M J Battista, K Gillen, A Hasenburg, S Krajnak, V Linz, R Schwab, K Angelou, D Haidopoulos, A Rodolakis, P Antonakis, K Bramis, L Chardalias, I Contis, N Dafnios, D Dellaportas, G Fragulidis, A Gklavas, M Konstadoulakis, N Memos, I Papaconstantinou, A Polydorou, T Theodosopoulos, A Vezakis, M I Antonopoulou, D K Manatakis, N Tasis, N Arkadopoulos, N Danias, P Economopoulou, P Kokoropoulos, A Larentzakis, N Michalopoulos, J Selmani, T Sidiropoulos, V Tsaousis, P Vassiliu, K Bouchagier, S Klimopoulos, D Paspaliari, G Stylianidis, K Baxevanidou, K Bouliaris, P Chatzikomnitsa, M Efthimiou, A Giaglaras, C Kalfountzos, G Koukoulis, A M Ntziovara, K Petropoulos, K Soulikia, I Tsiamalou, K Zervas, S Zourntou, I Baloyiannis, A Diamantis, E Gkrinia, J Hajiioannou, C Korais, O Koukoura, K Perivoliotis, A Saratziotis, C Skoulakis, D Symeonidis, K Tepetes, G Tzovaras, D Zacharoulis, V Alexoudi, K Antoniades, I Astreidis, P Christidis, D Deligiannidis, T Grivas, O Ioannidis, I Kalaitsidou, L Loutzidou, A Mantevas, D Michailidou, K Paraskevopoulos, S Politis, A Stavroglou, D Tatsis, I Tilaveridis, K Vahtsevanos, G Venetis, I Karaitianos, T Tsirlis, A Charalabopoulos, T Liakakos, E Mpaili, D Schizas, E Spartalis, A Syllaios, C Zografos, C Anthoulakis, C Christou, V Papadopoulos, A Tooulias, D Tsolakidis, G Tsoulfas, D Zouzoulas, E Athanasakis, E Chrysos, J Tsiaoussis, S Xenaki, E Xynos, K Futaba, M F Ho, S F Hon, Twc Mak, Ssm Ng, C C Foo, B Banky, N Suszták, M Aremu, A Canas-Martinez, O Cullivan, C Murphy, P Owens, L Pickett, L Akmenkalne, J Byrne, M Corrigan, C Cullinane, A Daly, C Fleming, P Jordan, S Killeen, N Lynch, A McCarthy, H Mustafa, S O'Brien, P O'Leary, Was Syed, L Vernon, D Callanan, L Huang, A Ionescu, P Sheahan, I Balasubramanian, M Boland, K Conlon, D Evoy, N Fearon, T Gallagher, J Geraghty, H Heneghan, N Kennedy, D Maguire, D McCartan, E W McDermott, R S Prichard, D Winter, D Alazawi, C Barry, T Boyle, W Butt, E M Connolly, N Donlon, C Donohue, B A Fahey, R Farrell, C Fitzgerald, J Kinsella, J O Larkin, P Lennon, P J Maguire, P Mccormick, B J Mehigan, H Mohan, T Nugent, H O'Sullivan, N Ravi, J V Reynolds, A Rogers, P Shokuhi, J Smith, L A Smith, C Timon, Y Bashir, G Bass, T Connelly, B Creavin, H Earley, J A Elliott, A Gillis, D Kavanagh, P Neary, J O'riordan, I S Reynolds, D Rice, P Ridgway, M Umair, M Whelan, P Carroll, C Collins, K Corless, L Finnegan, A Fowler, A Hogan, M Kerin, A Lowery, P McAnena, K McKevitt, K Nizami, É Ryan, A Samy, J C Coffey, R Cunningham, M Devine, D Nally, C Peirce, S Tormey, N Hardy, P Neary, S O'Malley, M Ryan, S Macina, N M Mariani, E Opocher, A Pisani Ceretti, F Ferrari, F Odicino, E Sartori, C Cotsoglou, S Granieri, F Bianco, A Camillo, M Colledan, S Tornese, M F Zambelli, G Bissolotti, S Fusetti, F Lemma, M V Marino, A Mirabella, G Vaccarella, C Agostini, G Alemanno, I Bartolini, C Bergamini, A Bruscino, C Checcucci, R De Vincenti, A Di Bella, M Fambrini, L Fortuna, G Maltinti, P Muiesan, F Petraglia, P Prosperi, M N Ringressi, M Risaliti, F Sorbi, A Taddei, R 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Walker, S Waseem, S Yordanov, T Jones, A Kattakayam, C Loh, R Lunevicius, S Pringle, A Schache, R Shaw, A Sheel, C Rossborough, D Angelou, M Choynowski, B McAree, A McCanny, D Neely, G Tutoveanu, S Ahad, Mfi De La Cruz Monroy, F Mosley, V Oktseloglou, A Alanbuki, M Patel, A Shabana, E Perera, D Raveendran, K Ravi-Shankar, J Thiruchelvam, L Arrowsmith, W Campbell, T Grove, C Kontovounisios, O Warren, P Rolland, A Aggarwal, S Brown, C Jelley, N Neal, R Clifford, N Eardley, E Krishnan, N Manu, E Martin, S Roy Mahapatra, O L Serevina, C Smith, D Vimalachandran, M Bordenave, R Houston, G Putnam, A Robson, H Tustin, K Emslie, P L Labib, A Marchbank, D Miller, G Minto, J Natale, H Nwinee, P Panahi, L Rogers, A Abubakar, M M Akhter Rahman, E Chan, Kyk Ko, H O'Brien, K Sasapu, H Woodun, R Inglis, H J Ng, A De Gea Rico, N Ghazali, J Lambert, G Markose, S Math, I Sarantitis, D Shrestha, A Sultana, M Taggarsi, S Timbrell, O P Vaz, L Vitone, A Day, H Dent, M Fahim, S Waheed, A Hunt, N Laskar, A Gupta, J Steinke, S Thrumurthy, E Massie, K McGivern, D Rutherford, M Wilson, J Hardie, S Kazzaz, S Handa, M Kaushal, A Kler, P Patel, J Redfern, S Tezas, Y Aawsaj, S Amonkar, C Barry, L Blackwell, D Blake, J Carter, H Emerson, A Fisher, M Katory, P Korompelis, W McCormick, A Mustafa, L Pearce, N Ratnavelu, R Reehal, L Kretzmer, L Lalou, B Manku, I Parwaiz, J Stafford, M Abdelkarim, A Asqalan, T Gala, S Ibrahim, A Maw, R Mithany, R Morgan, G Sundaram Venkatesan, K Ang, E J Caruana, M F Chowdhry, A Mohammad, A Nakas, S Rathinam, M Boal, O Brown, S Dwerryhouse, S Higgs, A Vallance, E Boyd, V Irvine, A Kirk, G Bakolas, A Boulton, A Chandock, T Khan, M Kumar, P Agoston, A Bille, B Challacombe, S Fraser, K Harrison-Phipps, J King, G Mehra, L Mills, M Najdy, R Nath, L Okiror, J Pilling, V Rizzo, T Routledge, A Sayasneh, L Stroman, A Wali, M Fehervari, C Fotopoulou, N Habib, S Hamrang-Yousefi, Z Jawad, L Jiao, M Pai, J Ploski, P Rajagopal, S Saso, M Sodergren, D Spalding, S Laws, C Hardie, C McNaught, R Alam, A Budacan, J Cahill, M Kalkat, S Karandikar, L Kenyon, D Naumann, A Patel, J Ayorinde, T Chase, T Cuming, A Ghanbari, L Humphreys, S Tayeh, A Aboelkassem Ibrahim, R Bichoo, H Cao, Akw Chai, J Choudhury, C Evans, H Fitzjohn, H Ikram, M Langstroth, M Loubani, A McMillan, S Nazir, Ssa Qadri, A Robinson, E Ross, T Sehgal, A Wilkins, J Dixon, J Dunning, K Freystaetter, M Jha, S Lester, A Madhavan, S V Thulasiraman, Y Viswanath, T Curl-Roper, C Delimpalta, Ccl Liao, V Velchuru, E Westwood, E Belcher, G Bond-Smith, S Chidambaram, F Di Chiara, K Fasanmade, L Fraser, H Fu, M Ganau, S Gore, J Graystone, D Jeyaretna, H Khatkar, M Lami, M Maher, S Mastoridis, R Mihai, R Piper, S Prabhu, Obf Risk, U Selbong, K Shah, R Smillie, H Soleymani Majd, S Sravanam, D Stavroulias, G D Tebala, M Vatish, C Verberne, K Wallwork, S Winter, M I Bhatti, H Boyd-Carson, E Elsey, E Gemmill, P Herrod, M Jibreel, E Lenzi, T Saafan, D Sapre, T Sian, N Watson, A Athanasiou, G Bourke, L Bradshaw, A Brunelli, J Burke, P Coe, F Costigan, H Elkadi, M Ho, J Johnstone, A Kanatas, V Kantola, A Kaufmann, A Laios, S Lam, E MacInnes, S Munot, C Nahm, M Otify, C Pompili, I Smith, G Theophilou, G Toogood, R Wade, D Ward, C West, S Annamalai, C Ashmore, A Boddy, T Hossain, A Kourdouli, A Gvaramadze, A Jibril, L Prusty, D Thekkinkattil, A Harky, M Shackcloth, A Askari, C Chan, N Cirocchi, S Kudchadkar, K Patel, J Sagar, S Shaw, R Talwar, M Abdalla, R Edmondson, O Ismail, D Jones, K Newton, N Stylianides, A Aderombi, U Andaleeb, O Bajomo, K Beatson, W Garrett, M Mehmood, V Ng, R Al-Habsi, G S Divya, B Keeler, B Al-Sarireh, R Egan, R Harries, A Henry, M Kittur, Z Li, K Parkins, F Soliman, N Spencer, D Thompson, C Burgess, C Gemmell, C Grieco, M Hollyman, L Hunt, J Morrison, S Ojha, N Ryan, F Abbadessa, S Barnard, C Chan, N Dawe, J Hammond, Ali F Mahmoud, I McPherson, C Mellor, J Moir, S Pandanaboyana, J Powell, B Rai, A Rogers, C Roy, A Sachdeva, C Saleh, S Tingle, T Williams, J Manickavasagam, C McDonald, N McGrath, N McSorley, K Ragupathy, L Ramsay, A Solth, O Kakisi, K Seebah, I Shaikh, L Sreedharan, M Youssef, J Shah, P Ameerally, N McLarty, S Mills, A Shenfine, K Sahnan, J Abu, E Addae-Boateng, D Bratt, L Brock, N Burnside, S Cadwell-Sneath, K Gajjar, C Gan, C Grundy, K Hallam, K Hassell, M Hawari, A Joshi, H Khout, K Konstantinidi, Rxn Lee, D Nunns, R Schiemer, T Walton, H Weaver, L Whisker, K Williamson, J McVeigh, R Myatt, M A Williams, R Kaur, E Leung, S Sundar, M Michel, S Patil, S Ravindran, J Sarveswaran, L Scott, M Edmond, E King, M Almond, A Bhangu, O Breik, L D Cato, A Desai, S Ford, E Griffiths, M Idle, M Kamal, A Kisiel, R Kulkarni, Jkc Mak, T Martin, P Nankivell, A Parente, S Parmar, A M Pathanki, L Phelan, P Praveen, S Saeed, N Sharma, J Singh, F Tirotta, D Vijayan, A Geddes, J McCaul, J McMahon, A H Khan, F Khan, A Mansuri, S Mukherjee, M Patel, M Sarigul, S Singh, K L Tan, A Woodham, A Adiamah, H Brewer, A Chowdhury, J Evans, D Humes, J Jackman, A Koh, C Lewis-Lloyd, O Oyende, J Reilly, D Worku, P Cool, G Cribb, K Shepherd, C Bisset, S Moug, N Elson, G Faulkner, P Saleh, C Underwood, G Brixton, L Findlay, T Klatte, A Majkowska, J Manson, R Potter, A Bhalla, Z Chia, P Daliya, A Goyal, E Grimley, A Hamad, A Kumar, F L Malcolm, E Theophilidou, J Bowden, N Campain, I Daniels, C Evans, G Fowler, J John, L Massey, F McDermott, J McGrath, A McLennan, M Ng, J Pascoe, N Rajaretnam, S Bulathsinhala, B Davidson, G Fusai, C Hidalgo Salinas, N Machairas, T Pissanou, J M Pollok, D A Raptis, F Soggiu, H Tzerbinis, S E Xyda, A Beamish, E Davies, R Foulkes, D Magowan, H Nassa, R Ooi, C Price, L Smith, F Solari, A Tang, G Williams, Y Al-Tamimi, A Bacon, N Beasley, D Chew, M Crank, N Ilenkovan, M Macdonald, B Narice, O Rominiyi, A Thompson, I Varley, T Drake, E Harrison, G Linder, J Mayes, R McGregor, R Skipworth, V Zamvar, E Davies, P Hawkin, T Raymond, O Ryska, R Baron, D Dunne, S Gahunia, C Halloran, N Howes, R McKinney, F McNicol, J Russ, P Szatmary, J R Tan, A Thomas, P Whelan, A Anzak, A Banerjee, O Fuwa, F Hughes, J D Jayasinghe, C Knowles, H Kocher, I Leal Silva, F S Ledesma, A Minicozzi, L Navaratne, R Rahman, R Ramamoorthy, C Sohrabi, M Thaha, B Thakur, M Venn, V Yip, R Baumber, J Parry, S Evans, L Jeys, G Morris, M Parry, J Stevenson, N Ahmadi, G Aresu, Z M Barrett-Brown, A S Coonar, H Durio Yates, D Gearon, J Hogan, M King, A Peryt, I S Pradeep, C Smith, M Adishesh, R Atherton, K Baxter, M Brocklehurst, M Chaudhury, N Krishnamohan, J McAleer, G Owens, E Parkin, P Patkar, I Phang, A Aladeojebi, M Ali, B Barmayehvar, A Gaunt, M Gowda, E Halliday, M Kitchen, F Mansour, M Thomas, D Zakai, N Abbassi-Ghadi, H Assalaarachchi, A Currie, M Flavin, A Frampton, M Hague, C Hammer, J Hopper, J Horsnell, S Humphries, A Kamocka, T K Madhuri, S Preston, P Singh, J Stebbing, A Tailor, D Walker, F Aljanadi, M Jones, P Mhandu, C O'Donnell, R Turkington, Z Al-Ishaq, S Bhasin, A S Bodla, A Burahee, A Crichton, R Fossett, N Pigadas, S Pickford, E Rahman, D Snee, R Vidya, N Yassin, F Colombo, D Fountain, M T Hasan, K Karabatsou, R Laurente, O Pathmanaban, A Al-Mukhtar, S Brown, J Edwards, A Giblin, C Kelty, M Lee, G Lye, T Newman, A Sharkey, C Steele, N Sureshkumar Shah, E Whitehall, R Athwal, A Baker, L Jones, C Konstantinou, S Ramcharan, S Singh, J Vatish, R Wilkin, M Ethunandan, G K Sekhon, H Shields, R Singh, F Wensley, S Lawday, A Lyons, T Abbott, S Anwar, K Ghufoor, C Sohrabi, E Chung, R Hagger, A Hainsworth, A Karim, H Owen, A Ramwell, K Williams, C Baker, A Davies, J Gossage, M Kelly, W Knight, J Hall, G Harris, G James, C Kang, D J Lin, A D Rajgor, T Royle, R Scurrah, B Steel, L J Watson, D Choi, R Hutchison, A Jain, V Luoma, H Marcus, R May, A Menon, B Pramodana, L Webber, I A Aneke, P Asaad, B Brown, J Collis, S Duff, A Khan, F Moura, B Wadham, H Warburton, T Elmoslemany, M Jenkinson, C Millward, R Zakaria, S Mccluney, C Parmar, S Shah, J Allison, M S Babar, B Collard, S Goodrum, K Lau, A Patel, R Scott, E Thomas, H Whitmore, D Balasubramaniam, B Jayasankar, S Kapoor, A Ramachandran, A Elhamshary, Smb Imam, K Kapriniotis, V Kasivisvanathan, J Lindsay, S Rakhshani-Moghadam, N Beech, M Chand, L Green, N Kalavrezos, H Kiconco, R McEwen, C Schilling, D Sinha, J Pereca, J Singh, S Chopra, D Egbeare, R Thomas, T Combellack, Sef Jones, M Kornaszewska, M Mohammed, A Sharma, G Tahhan, V Valtzoglou, J Williams, P Eskander, K Gash, L Gourbault, M Hanna, T Maccabe, C Newton, J Olivier, S Rozwadowski, E Teh, D West, H Al-Omishy, M Baig, H Bates, G Di Taranto, K Dickson, N Dunne, C Gill, D Howe, D Jeevan, A Khajuria, K Martin-Ucar AMcEvoy, P Naredla, V Ng, S Robertson, M Sait, D R Sarma, S Shanbhag, T Shortland, S Simmonds, J Skillman, N Tewari, G Walton, M A Akhtar, A Brunt, J McIntyre, K Milne, M M Rashid, A Sgro, K E Stewart, A Turnbull, M Aguilar Gonzalez, S Talukder, C Boyle, D Fernando, K Gallagher, A Laird, D Tham, M Bath, P Patki, C Sohrabi, C Tanabalan, T Arif, C Magee, T Nambirajan, S Powell, R Vinayagam, I Flindall, A Hanson, V Mahendran, S Green, M Lim, L MacDonald, V Miu, L Onos, K Sheridan, R Young, F Alam, O Griffiths, C Houlden, R Jones, V S Kolli, A K Lala, S Leeson, R Peevor, Z Seymour, L Chen, E Henderson, A Loehrer, K Brown, D Fleming, A Haynes, C Heron, C Hill, H Kay, E Leede, K McElhinney, K Olson, E C Osterberg, C Riley, P Srikanth, M Thornhill, D Blazer, G DiLalla, E S Hwang, W Lee, M Lidsky, J Plichta, L Rosenberger, R Scheri, K Shah, K Turnage, J Visgauss, S Zani, J Farma, J Clark, D Kwon, E Etchill, H E Gabre-Kidan AJenny, A Kent, M Ladd, C Long, H Malapati, A Margalit, S Rapaport, J Rose, K Stevens, L Tsai, D Vervoort, P Yesantharao, A Dehal, D Klaristenfeld, K Huynh, L Brown, I Ganly, J Mullinax, N Gusani, J Hazelton, J Maines, J S Oh, A Ssentongo, P Ssentongo, M Azam, A Choudhry, W Marx, J Fleming, A Fuson, J Gigliotti, A Ovaitt, Y Ying, M K Abel, V Andaya, K Bigay, M A Boeck, L Chen, H Chern, C Corvera, I El-Sayed, A Glencer, P Ha, Bcs Hamilton, C Heaton, K Hirose, D M Jablons, K Kirkwood, L Z Kornblith, J R Kratz, R Lee, P N Miller, E Nakakura, B Nunez-Garcia, R O'Donnell, D Ozgediz, P Park, B Robinson, A Sarin, B Sheu, M Varma, K Wai, R Wustrack, M J Xu, D Beswick, J Goddard, J Manor, J Song, T Fullmer, C Gaskill, N Gross, K Kiong, C L Roland, S N Zafar, M Abdallah, A Abouassi, M Almasri, G Kulkarni, H Marwan, M Mehdi, S Aoun, V S Ban, H H Batjer, J Caruso, D Abbott, A Acher, T Aiken, J Barrett, E Foley, P Schwartz, S N Zafar, A Hawkins, A Maiga, J Laufer, S Scasso
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Aged, 80 and over ,Male ,Critical Care ,SARS-CoV-2 ,International Cooperation ,COVID-19 ,Middle Aged ,Cohort Studies ,Logistic Models ,Postoperative Complications ,Elective Surgical Procedures ,Neoplasms ,Outcome Assessment, Health Care ,Humans ,Female ,Epidemics ,Aged - Abstract
PURPOSE As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19–free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19–free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19–free surgical pathways. Patients who underwent surgery within COVID-19–free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19–free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score–matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19–free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION Within available resources, dedicated COVID-19–free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks.
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- 2021
13. Interaction of massless minimally coupled scalar field with spinor field in de Sitter universe
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Ahmadi, Y., primary
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- 2021
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14. The effect of online mathematics learning on junior high school mathematic resilience during covid-19 pandemic
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Amelia, R, primary, Kadarisma, G, additional, Fitriani, N, additional, and Ahmadi, Y, additional
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- 2020
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15. De Sitter scalar–spinor interaction in Minkowski limit
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Ahmadi, Y., primary
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- 2020
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16. Comparison of the Quality of Breastfeeding in Postpartum Mothers Undergone Cesarean and Vaginal Delivery in Selected Military Hospitals of Tehran
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Ahmadi. Y, Sharififar. S, Pishgooie. Sah, Hoseyni. Ms, Teymori. F, and Yari. M
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Pediatrics ,medicine.medical_specialty ,business.industry ,Obstetrics ,Vaginal delivery ,media_common.quotation_subject ,General Engineering ,medicine ,Breastfeeding ,Quality (business) ,business ,media_common - Published
- 2017
17. Scalar–spinor fields interaction in de Sitter ambient space formalism
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Ahmadi, Y., primary, Jalilifard, F., additional, and Takook, M. V., additional
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- 2019
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18. Analysis of high school students’ errors in mathematical proving: the case of mathematical induction
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Ahmadi, Y, primary, Kusumah, Y S, additional, and Jupri, A, additional
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- 2019
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19. P014/O04 Phenotypic heterogeneity of regulatory T cells in rheumatoid arthritis
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El Ahmadi, Y, primary, Cren, M, additional, Pers, Y-M, additional, Dufourq-Lopez, E, additional, Jorgensen, C, additional, Fereirra, R, additional, and Louis-Plence, P, additional
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- 2019
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20. Electron–photon interaction in de Sitter ambient space formalism
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Jalilifard, F., primary, Ahmadi, Y., additional, and Takook, M. V., additional
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- 2018
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21. A Comparison of Natural Depletion and Different Scenarios of Injection in the Reservoir From the Beginning of Oil Production
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Ahmadi, Y., primary, Hasanbaygi, M., additional, and Kharrat, R., additional
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- 2014
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22. A Compositional Reservoir Simulation and Experimental Investigation of Asphaltene Onset Pressure
- Author
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Ahmadi, Y., primary and Kharrat, R., additional
- Published
- 2014
- Full Text
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23. The Effect of Temperature and Pressure on the Reversibility of Asphaltene Precipitation
- Author
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Ahmadi, Y., primary, Kharrat, R., additional, Hashemi, A., additional, Bahrami, P., additional, and Mahdavi, S., additional
- Published
- 2014
- Full Text
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24. Picosecond Wavelength Conversion Using Semiconductor Optical Amplifier Integrated with Microring Resonator Notch Filter
- Author
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Razaghi, M., Gandomkar, M., Ahmadi, Y., Das, Narottam, Connelly, M., Razaghi, M., Gandomkar, M., Ahmadi, Y., Das, Narottam, and Connelly, M.
- Abstract
In this paper, we analyse the picosecond wavelength conversion using semiconductor optical amplifier (SOA) with a novel technique. For an accurate and precise modelling, all the nonlinear effects that are relevant to picosecond and subpicosecond pulse regime, such as, self-phase modulation, nonlinear Kerr effect, spectral hole burning, carrier heating, carrier depletion, two-photon absorption and group velocity dispersion are taken into account in the SOA model. We integrate the structure with a microring resonator notch filter to eliminate the unwanted pump and probe signals at the output of the system. It shows that with the three coupled microring resonators, output four-wave mixing (FWM) signal generated by the SOA can be filtered accurately. Moreover, our results demonstrate that the microring resonator can be used for modifying the shape and spectrum of the output FWM signal. Simulation results show that this new technique enhances the output time bandwidth product.
- Published
- 2012
25. Four-component Synthesis of 1,3,4-Oxadiazole Derivatives from (N-Isocyanimino)triphenylphosphorane, (E)-Cinnamic Acids, Acetaldehyde and Secondary Amines
- Author
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Ramazani, A., primary, Ahmadi, Y., additional, and Nasrabadi, F. Z., additional
- Published
- 2011
- Full Text
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26. 54 VARIATION OF LEPTIN LEVELS IN SPERMATIC VEIN BLOOD, PERIPHERAL BLOOD AND SEMEN OF VARICOCELE PATIENTS
- Author
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Zarghami, N., primary, Nejati, K., additional, Ahmadi, Y., additional, and Pourhasan, M., additional
- Published
- 2010
- Full Text
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27. An open-source applied simulation framework for performance evaluation of QRS complex detectors
- Author
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Ghaffari, A., primary, Homaeinezhad, M.R., additional, and Ahmadi, Y., additional
- Published
- 2010
- Full Text
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28. Measuring the productivity of higher education institutions by Data Envelopment Analysis (DEA).
- Author
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Yazdi, E. and Ahmadi, Y.
- Subjects
DATA envelopment analysis ,EDUCATIONAL productivity ,EDUCATIONAL accountability ,ACHIEVEMENT gains (Education) ,EDUCATIONAL innovations ,UNIVERSITIES & colleges - Abstract
Aims: Since efficiency improvement in service organizations is one of the features of today's developed societies, evaluating the function of higher education systems is of great importance. The aim of this study was to measure the efficiency of higher education institutions of Sirjan. Methods: This descriptive retrograde study was carried out in Sirjan in 2010. The research population was all 6 higher education institutions within the city of Sirjan. The Data Envelopment Analysis technique and the Malmquist Total Factor Efficiency Index were employed to measure the efficiency and variables such as the number of academic staff, number of graduates, number of courses offered in the education sector, number of library books, number of workshops and laboratories, number of research plans and books and articles in the research sector were taken into account. The data envelopment analysis and DEAP2 software were used for the measurement of amounts and the Excel software was used for information organizing. Results: The total factor efficiency mean in research sector was 0.989 indicating a decrease of 1.1% in efficiency within the studied period. The total factor efficiency mean in the education sector was 1.312 indicating an increase of 31.2% in efficiency within the studied period. Conclusion: On the whole, the total factors efficiency shows a decreased efficiency in the research sector of Sirjan's higher education institutions that can be mainly due to technological changes and the total factors efficiency in education sector shows efficiency improvement that can be largely due to managerial efficiency changes. [ABSTRACT FROM AUTHOR]
- Published
- 2011
29. An open-source computer model for visualization of artificial abnormal multi-Lead electrocardiographic phenomena
- Author
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Ghaffari, A., Homaeinezhad, M. R., Ahmadi, Y., Rahnavard, M., and Reza Rahmani
30. Assessment and analysis of the effect of ncovid-19 on different body organs of the patients at tertiary care hospital of quetta, pakistan
- Author
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Arain, S. P., Qureshi, A., Mangi, A. A., Shah, K., Khan, H., Shah, S. S. A., Al Ahmadi, Y. M., Shehzad, M. A., YASER ALAHMADI, Dar, E., Batool, F., Ahmed, N. J., Memon, B. M., Juna, A. A., and E-Hira, M.
31. VARIATION OF LEPTIN LEVELS IN SPERMATIC VEIN BLOOD, PERIPHERAL BLOOD AND SEMEN OF VARICOCELE PATIENTS.
- Author
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Zarghami, N., Nejati, K., Ahmadi, Y., and Pourhasan, M.
- Subjects
- *
LEPTIN , *INFERTILITY , *VARICOCELE , *HORMONES , *SPERMATIC cord diseases , *VARICOSE veins - Abstract
Introduction: Varicocele is one of the main causes of infertility. Varicoceles are found in 20 to 40% of men. It is shown that leptin affects Leydig cells and spermatic cells in animal models. In addition, the presence of leptin in human and boar seminal plasma and in human spermatozoa has been demonstrated. Considering the effect of Varicocele on the sperm motility and morphology, the aim of this study was to find the any variations in the leptin levels in spermatic vein blood, peripheral blood and semen of varicocele patients, and probable relations among them and sperm characteristics. Methods: 30 patients, who had the inclusion criteria for the study, with varicocele grades II and III with the complaint of infertility or testis pain were studied. Semen samples were evaluated with the WHO criteria. Leptin levels were measured by immonoassay method in the serum and semen samples. Results: A significant correlation was founded between serum levels of leptin and spermatic vein levels of leptin in the study group (P < 0.005). Serum Leptin had significant relation with only motility of sperm and morphology in infertile patients and semen leptin levels had a positive correlation with sperm concentration. Wherase, semen levels of leptin had only significant relation with sperm concentration in fertile individuals. The testoterone concentration in spermatic vein was significantly correlated with sperm concentration, morphology and motility in control group. There was also a linear relationship between serum and semen leptin levels. Conclusion: In summary, it is speculated that leptin could affect sperm motility by influencing potency and production of that and also spermatic vein testosterone needed to be evaluated along with leptin levels in infertility prediction. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
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32. Reactive adsorption and catalytic oxidation of gaseous hydrogen sulfide using a prototype air purifier built with bismuth-doped titanium dioxide.
- Author
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Wang X, Boukhvalov DW, Ahmadi Y, Younis SA, Szulejko JE, Maitlo HA, and Kim KH
- Abstract
A prototype air purifier (AP) module has been constructed using bismuth-doped titanium dioxide (Bi
x -P25: x(%) as Bi/Ti molar ratios of 1.1, 2.1, 3.3, 5.3, and 8.7). The reactive adsorption property of Bix -P25 materials is evaluated against H2 S gas at a recirculation rate of 160 L min-1 in a 17 L closed chamber. The AP (Bi5.3 -P25) exhibits superior performance against 10 ppm H2 S in dry air under dark conditions (i.e., without light irradiation), with a removal efficiency (XH2S )= 99% in 5 mins, reaction kinetic rate (r (at X = 10%))= 7.3 mmol h-1 g-1 , and partition coefficient= 0.18 mol kg-1 Pa-1 . As such, its superiority is evident over the reference AP (P25) filter with XH2S < 10%. The clean air delivery rate (CADR) of AP (Bi5.3 -P25) increases noticeably from 9.9 to 17.8 L min-1 with increasing relative humidity (RH) from 0 to 80%, respectively. In contrast, the CADR decreases from 9.9 to 5.8 L min-1 as the H2 S increases from 10 to 20 ppm. According to density functional theory (DFT), the presence of H2 O vapor enhances the hydroxylation of Bix -P25 surface to promote H2 S mineralization through the formation of TiS3 (i.e., thermodynamic reaction of S atom with the catalytic surface). Complete removal of H2 S on the Bi5.3 -P25 surface is also confirmed consistently through gas chromatography-mass spectrometry (GC-MS), in-situ diffuse reflection infrared spectroscopy (in-situ DRIFTS), and elemental analysis (EA). This work represents the first utilization of Bix -P25 materials fabricated on an AP platform toward the desulfurization of H2 S at room temperature (RT). The practical utility of Bix -P25 is overall validated by its eminent role in reactive adsorption and catalytic oxidation (RACO) of H2 S from the air., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
- Full Text
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33. Short-term storability of volatile organic compounds in bag sampling systems under ambient conditions.
- Author
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Ha SH, Ahmadi Y, Shin HJ, and Kim KH
- Subjects
- Air Pollutants analysis, Reproducibility of Results, Time Factors, Volatile Organic Compounds analysis, Environmental Monitoring methods
- Abstract
Although bag sampling is a common quantification tool for volatile organic compounds (VOCs), it can serve as a major source of experimental bias, when storing even over a short duration (<24 h). To learn more about the reliability of the bag sampling method, the temporal stability of 27 VOCs (classified into five groups (i.e., aldehydes, nonpolar aromatic hydrocarbons, aliphatic carboxylic acids, phenol and methylphenols, and miscellaneous odorants) is assessed using poly-ester aluminum (PEA) bags at five intervals over a day (0.17, 1, 2, 6, and 24 h). In terms of reproducibility (e.g., relative standard error [RSE
t , %]), nonpolar aromatic hydrocarbons (BTXS) exhibit the highest consistency (e.g., average RSE <1.55%). Considerable loss of VOCs is observed in the preparation of gaseous standards from a liquid phase standard when assessed by gas/liquid (G/L) ratio. Further, VOCs with lower molecular weights (e.g., propionaldehyde: 77%-94.4%) and branched molecular structures (e.g., isovaleraldehyde: 67.2%-78.9%) tend to have high G/L ratio (e.g., relative to valeraldehyde: 55.1%-66%). The overall relative recovery (RR; %) values of VOCs indicate an exponential decrease over 24 h. BTXS maintain fairly good RR values (above 94.3% at all intervals), possibly due to the nonpolar structure with uniform distribution of π electrons. In contrast, indole and skatole show the least preservation after 24 h (e.g., RR4 values of 10.9% and 24.6%, respectively) due to their highly reactive characteristics. The storability of VOCs appears to be affected by a number of variables (e.g., molecular weight, presence of ethyl branch, and time: e.g., R2 > 0.9). The results of this study offer valuable guidelines for the accurate quantification of VOC levels in air., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
34. Increase in the specificity of immunoassay methods by direct targeting different epitopes; sequential chain reactions.
- Author
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Ahmadi Y, Ahmadi H, and Aghebati-Maleki L
- Abstract
Background: Immunoassay methods typically involve the use of antibodies, which are either labeled with an enzyme to generate a detectable product or directly tagged with a radioactive or fluorescent substrate., Methods: One approach to enhance the specificity of immuno-detection methods is by employing a combination of different antibodies, such as primary and secondary., Results: However, relying solely on one antibody targeting another may not offer the highest level of precision for improving immunoassay specificity; A novel strategy for enhancing the specificity of immunoassay techniques involves directly targeting different epitopes of an antigen., Conclusions: This approach entails utilizing sequential chain reactions facilitated by distinct enzymes bound to various antibodies, each directed at specific epitopes on the antigen. Such an innovative method holds promise for advancing the specificity of immunoassay methods.
- Published
- 2024
- Full Text
- View/download PDF
35. Tuning strategies of MIL metal organic frameworks for adsorptive removal of formaldehyde in air.
- Author
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Sun Y, Ahmadi Y, and Kim KH
- Subjects
- Adsorption, Titanium chemistry, Aluminum chemistry, Spectroscopy, Fourier Transform Infrared, Iron chemistry, Formaldehyde chemistry, Metal-Organic Frameworks chemistry, Air Pollutants chemistry
- Abstract
Materials Institute Lavoisier (MIL) metal organic frameworks (MOFs) are known for their potential to adsorb gaseous organic pollutants. This study explores the synergistic effects between the selection of central metals (e.g., titanium, iron, and aluminum) and the incorporation of -NH
2 groups in terms of adsorption efficiency against gaseous formaldehyde (FA). A group of the pristine MIL MOFs is synthesized using three different metals (i.e., titanium, iron, and aluminum) and terephthalic acid along with their NH2 derivatives using 2-aminoterephthalic acid. Among the pristine forms, MIL-125(Ti) achieves the highest FA adsorption capacity (Q) of 26.96 mg g-1 and a partition coefficient (PC) of 0.0898 mol kg-1 Pa-1 . Further, amination significantly improves the FA adsorption potential of NH2 -MIL-125(Ti) with a Q value of 91.22 mg g-1 (PC = 0.3038 mol kg-1 Pa-1 ). In situ diffuse reflectance infrared Fourier-transform spectroscopy reveals that the FA adsorption of plain MILs should be governed primarily by physisorption. In contrast, FA adsorption of NH2 -MILs appears to be regulated by both physisorption and chemisorption, while the latter being affected mainly through FA-NH2 interactions (Schiff base reactions). These findings provide valuable insights into the utility of aminated MIL sorbents, possibly toward the efficient management of indoor air quality., Competing Interests: Declaration of competing interest The author has declared no conflict of interest., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
36. The selection of a nitrogen precursor for the construction of N-doped titanium dioxide with enhanced photocatalytic activity for the removal of gaseous toluene.
- Author
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Sun Y, Ahmadi Y, and Kim KH
- Subjects
- Catalysis, Air Pollutants chemistry, Air Pollutants analysis, Triazines chemistry, Photochemical Processes, Photolysis, Titanium chemistry, Toluene chemistry, Nitrogen chemistry
- Abstract
The preparation of nitrogen-doped TiO
2 (i.e., N-TiO2 ) catalysts is a highly effective option to improve the photocatalytic activity of TiO2 . Nonetheless, relatively little is known about the effects of dopant precursors selected for their preparation with regard to the photocatalytic efficacy. In this study, three types of dopants are selected and used as N sources (urea (U), melamine (M), and aqueous ammonia (A)) for N-TiO2 samples with the name codes of NTU, NTM, and NTA, respectively. The photocatalytic efficacy of these N-TiO2 samples is examined against toluene in a packed bed flow reactor. Under optimal conditions (e.g., relative humidity (RH) = 20% and gas hourly space velocity (GHSV) = 1698 h-1 ), the superiority of NTA is evident over others with a quantum efficiency (QE) of 7.03 × 10-4 molecules photon-1 , a space time yield (STY) of 1.38 × 10-4 molecules photon-1 mg-1 , and a specific clean air delivery rate (SCADR) of 1148.8 L g-1 h-1 . The analysis based on in-situ diffuse reflectance infrared Fourier transform spectroscopy and gas chromatography-mass spectrometry confirms the formation of several intermediates such as benzyl alcohol, benzaldehyde, benzoic acid, and alkane species through ring opening reactions. In addition, the prepared NTA photocatalyst exhibits the highest toluene photocatalytic degradation efficiency among all TiO2 -based catalysts surveyed to date. Overall, this study offers as a valuable guideline for the development of advanced TiO2 catalytic systems (such as N-TiO2 ) for the treatment of aromatic hydrocarbons in indoor air., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
37. Mammary Paget's Disease Mimicking Benign and Malignant Dermatological Conditions: Clinical Challenges and Diagnostic Considerations.
- Author
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Scott-Emuakpor R, Reza-Soltani S, Altaf S, Nr K, Kołodziej F, Sil-Zavaleta S, Nalla M, Ullah MN, Qureshi MR, Ahmadi Y, Rezvani A, and Siddiqui HF
- Abstract
Mammary Paget's disease (MPD) or Paget's disease of the breast is a rare dermatological malignancy of the nipple-areolar complex that manifests with a spectrum of symptoms spanning from itching and redness to more severe indications such as breast lump, nipple-areolar complex destruction, or nipple discharge. It is predominantly associated with an underlying ductal carcinoma in situ or invasive ductal carcinoma. MPD often masquerades as other benign and malignant dermatological conditions, including eczema, atopic dermatitis, psoriasis, and squamous and basal cell carcinomas, leading to delayed diagnosis and inappropriate treatment. Only one-third of the patients present with a palpable lump; therefore, advanced age with chronic and unilateral lesions should raise concern for MPD. Our review article presents case reports of MPD imitating other skin conditions and underscores the key findings of clinical features and diagnostic workup to help differentiate the condition. A literature review revealed that studies emphasize caution regarding the sole use of mammography and ultrasound in diagnosing MPD, particularly in cases lacking a palpable lump. This highlights the MRI as a superior and more accurate imaging tool. However, any suspicious lesion must be biopsied to allow histopathological and immunohistochemical examination, since there are some cases where MRI findings were negative in the presence of a biopsy-proven MPD. This highlights the need for clinicians to investigate any suspicious lesion of the nipple or breast using the complete triple assessment approach to exclude an underlying malignancy. It is imperative to establish therapeutic guidelines to approach any nipple lesion to minimize the risk of misdiagnosing any underlying cancer, which can be potentially fatal if left alone., Competing Interests: Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Scott-Emuakpor et al.)
- Published
- 2024
- Full Text
- View/download PDF
38. Role of Artificial Intelligence in the Diagnosis of Gastroesophageal Reflux Disease.
- Author
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Kommuru S, Adekunle F, Niño S, Arefin S, Thalvayapati SP, Kuriakose D, Ahmadi Y, Vinyak S, and Nazir Z
- Abstract
Gastroesophageal reflux disease (GERD) is a disorder that usually presents with heartburn. GERD is diagnosed clinically, but most patients are misdiagnosed due to atypical presentations. The increased use of artificial intelligence (AI) in healthcare has provided multiple ways of diagnosing and treating patients accurately. In this review, multiple studies in which AI models were used to diagnose GERD are discussed. According to the studies, using AI models helped to diagnose GERD in patients accurately. AI, although considered one of the most potent emerging aspects of medicine with its accuracy in patient diagnosis, presents limitations of its own, which explains why healthcare providers may hesitate to use AI in patient care. The challenges and limitations should be addressed before AI is fully incorporated into the healthcare system., Competing Interests: Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Kommuru et al.)
- Published
- 2024
- Full Text
- View/download PDF
39. The effects of metal-oxide content in MnO 2 -activated carbon composites on reactive adsorption and catalytic oxidation of formaldehyde and toluene in air.
- Author
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Kim WK, Verma S, Ahmadi Y, Cho MS, and Kim KH
- Abstract
The deterioration in air quality caused by volatile organic compounds (VOCs) has become an important environmental issue. Here, activated carbon (AC) composites with manganese oxide (MnO
2 : 1 % to 50 %) are synthesized as MAC for the removal of formaldehyde (FA) and toluene in air through a combination of reactive adsorption and catalytic oxidation (RACO) at room temperature (RT). The best-performing composite (MAC-20: 20 % of MnO2 ) exhibits a 10 % breakthrough volume (BTV10%) of FA and toluene at 41.2 and 377 L g-1 , respectively while realizing complete oxidation of FA and toluene into carbon dioxide (CO2 ) at 100 °C and 275 °C, respectively. The reaction kinetic rates (r) for 10 % removal efficiency of FA and toluene (XFA or T ) at RT are estimated as 9.82E-02 and 3.20E-02 mmol g-1 h-1 , respectively. The high performance of MAC-20 can be attributed to its enriched adsorption capacity of oxygen vacancy (OV ) and the presence of adsorbed oxygen (OA ), as shown by an Mn3+ /Mn4+ ratio of 0.729 and an OA /lattice‑oxygen (OL ) ratio of 1.50. The results of this study highlight the interactive roles of oxygen abundance and temperature in the generation of distinctive oxidation patterns for FA in reference to toluene. This study is expected to offer practical guidance for the implementation of RACO against diverse VOCs for efficient management of air quality., Competing Interests: Declaration of competing interest The authors declare no competing interests with the publication of this manuscript., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
40. Site-specific mutagenesis on Mnemiopsin 2: Calcium coordination and substrate binding properties of new variants.
- Author
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Ahmadi Y, Jafarian V, and Shirdel A
- Subjects
- Mutagenesis, Site-Directed, Luminescent Proteins chemistry, Luminescent Proteins genetics, Luminescent Proteins metabolism, Circular Dichroism, Thermodynamics, Protein Denaturation, Calcium chemistry
- Abstract
We used site-specific mutagenesis by targeting E179 and F190 on the structure of photoprotein Mnemiopsin 2 (Mn2) from Mnemiopsis leidyi. The tertiary structure of E179S and F190L mutants was made by the MODELLER program. Far-ultraviolet circular dichroism data showed that the overall secondary structural content of photoprotein is not changed upon mutation, however the helicity and stabilizing interactions in helical structure decreases in mutants as compared with the wild-type (WT) photoprotein. Fluorescence spectra data revealed that the tertiary structure of the mutants is more compact than that of WT Mn2. According to the heat-induced denaturation experiments data, the melting temperature (T
m ) for the unfolding of tertiary structure of the F190L variant increases by 3°C compared with that of the WT and E179S mutant. Interestingly, the conformational enthalpy of the F190L mutant (86 kcal mol-1 ) is considerably lower than those in the WT photoprotein (102 kcal mol-1 ) and E179S mutant (106 kcal mol-1 ). The significant difference in the enthalpy of the thermal unfolding process could be explained by considering that the thermally denatured state of the F190L mutant is structurally less expanded than the WT and E179S variants. Bioluminescence activity data showed that the maximum characteristic wavelengths of the mutants undergo blue shift as compared with the WT protein. Initial intensity of the F190L and E179S variants was recorded to be 137.5% and 55.9% of the WT protein, respectively., (© 2024 John Wiley & Sons Ltd.)- Published
- 2024
- Full Text
- View/download PDF
41. Isolation and Identification of Effective Probiotics on Drug-Resistant Acinetobacter baumannii Strains and Their Biofilms.
- Author
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Abbasi Z, Ghasemi SM, Ahmadi Y, and Shokri D
- Abstract
Introduction: This study aimed to identify, assess, and isolate strong lactobacilli demonstrating broad antibacterial and anti-biofilm activity against drug-resistant strains of Acinetobacter baumannii . Additionally, the mechanism of inhibition of these organisms was to be determined., Methods: Over a 6-month period (from December 2021 to June 2022), 53 clinical A. baumannii strains were collected from clinical samples. Twenty probiotic strains were isolated from local dairy products. Antibacterial activity of Lactobacillus strains' cell-free supernatant (CFS) was identified using the agar well diffusion method and the microbroth dilution test. Anti-biofilm effect was performed by the microtiter plate assay. The MTT assay was also used to look into the probiotics' cytotoxic effects on the L929 fibroblast cell line., Results: During the 6-month period, 53 clinical A. baumannii strains were obtained and identified. Out of 20 lactobacillus strains, the CFS of a lactobacillus strain (named L9) showed an inhibitory effect against all A. baumannii strains. Using the broth microdilution method, it was shown that the minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of CFS extracts of L9 strains against A. baumannii strains were both ¼ mg/mL. The result of the anti-biofilm showed that the selected probiotic could inhibit biofilm formation. The most common organic acid produced by all Lactobacillus strains, according to the HPLC method, was lactic acid, which was followed by acetic acid. The L929 fibroblast cell line was used in the cytotoxicity assay, which revealed that 100% of the cells in the L929 fibroblast cell line survived treatment with successive doses of CFSs for a full day., Conclusion: The probiotic strain isolated from local yogurt in this study showed potential anti-biofilm and antimicrobial properties against all drug-resistant Acinetobacter isolates. Given the increasing interest in probiotic microorganisms based on their high health benefits, further studies are recommended on the mechanisms of action between probiotics and A. baumannii strains to find new solutions for biological control and treatment of these infections without the use of antibiotics., Competing Interests: The authors declare that they have no conflicts of interest., (Copyright © 2024 Zahra Abbasi et al.)
- Published
- 2024
- Full Text
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42. Enhanced oil recovery by using modified ZnO nanocomposites in sandstone oil reservoirs.
- Author
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Ahmadi Y, Mansouri M, and Pourafshary P
- Abstract
Recently, nanocomposites were employed to improve the extraction of oil in different reservoirs. Due to the unique characteristics of nanoparticles such as small size, efficient altering main mechanisms such as IFT, CA, and viscosity reduction, have received wide attention among researchers. This study investigated the application of a newly designed ZnO-cerium N-composite for EOR at reservoir conditions, and the performance was compared to the standalone ZnO nanoparticles. After performing the morphology of the N-composite, the effect of the N-composites on the wettability alteration, interfacial tension, viscosity, Zeta potential, pH, and density was studied at different N-composites concentrations at reservoir conditions. Based on the results of rock/fluid interactions at the static phase, an optimum concentration was chosen for performing dynamic core flooding experiments. At 100 ppm, the highest stability and the highest reduction in capillary force were observed. The presence of Ce in the structure of the N-composite changes the pore volume of ZnO-Ce compared to ZnO nanoparticles, which affects the surface charge. IFT (mN/m), CA (°), and zeta potential (mV) were (22.51, 40.83, and - 44.36), and (30.50, 50.21, and - 31.05) for ZnO-Ce and ZnO, respectively at 100 ppm. By application of the optimized nanofluid in an oil displacement study, RF in the presence of ZnO-Ce, and ZnO were 37.11% and 71.40%, respectively., (© 2024. The Author(s).)
- Published
- 2024
- Full Text
- View/download PDF
43. Application of Antimicrobial Peptides as Diagnostic Biosensors.
- Author
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Ahmadi Y, Savini F, Mutter N, and Barišić I
- Subjects
- Humans, Pandemics, Bacteria, Peptides, Anti-Bacterial Agents chemistry, Antimicrobial Peptides, Biosensing Techniques
- Abstract
The COVID-19 pandemic has shown how emerging infectious diseases could quickly affect the global health and economy. New pathogens with pandemic potential are also expected to appear soon. Moreover, the large use of antibiotics has led to the development of different so-called "superbugs" capable of escaping all of the current antibiotics. In this context, the early and cost-effective detection of pathogens is crucial to avoid the spreading of new pathogens. Here, we present molecular sensors for the recognition of a broad panel of different bacterial species. The detection is based on the use of bacteria-binding peptides (BBPs) in combination with horseradish peroxidase (HRP). We developed a reliable ELISA-like assay that permits us to study the affinity of different BBPs toward some of the most important bacterial pathogens.
- Published
- 2024
- Full Text
- View/download PDF
44. The relative dominance of surface oxygen content over pore properties in controlling adsorption and retrograde behavior of gaseous toluene over microporous carbon.
- Author
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Liu L, Ahmadi Y, Kim KH, Kukkar D, and Szulejko JE
- Abstract
The adsorption potential of activated carbon (AC) derived from macadamia nut shells (product code of Procarb-900: namely, AC-P) has been investigated using gaseous toluene as the target pollutant. The powder AC-P with high-microporosity (96%) and oxygen content (5.62%) exhibited very high adsorption capacity (214 mg·g
-1 ) and partition coefficient (PC: 25 mol·kg-1 ·Pa-1 ) against 100 ppm (10 Pa) toluene at 99% breakthrough levels (1 atm dry N2 ). The factors governing toluene adsorption were explored with respect to the key variables such as surface functional groups, pore size distribution, sorbent bed mass (50, 100, and 150 mg), and particle size (i.e., 0.212-0.6 mm (powder AC: PAC)) vs. 0.6-2.36 mm (granular AC: GAC)). Accordingly, the adsorption process was physical, mainly due to the non-polar interactions (i.e., π-π interactions) between the adsorbent and adsorbate molecules. The high affinity of AC-P at low breakthrough levels was obtained through a combination of smaller particle size (PAC) and larger adsorbent mass (i.e., 150 mg) with the appearance of a very pronounced retrograde phenomenon (e.g., at < 1% breakthrough level). As such, toluene adsorption appeared to be affected more sensitively by particle size and adsorbent mass (especially at low breakthrough levels) than by high microporosity. Most importantly, the oxygen content of AC emerges as one of the key factors governing the maximum capacity, as the changes in pore volume are not crucial to explain the observed adsorption patterns of toluene., Competing Interests: Declaration of competing interest Younes Ahmadi reports financial support was provided by National Research Foundation of Korea. Ki-Hyun Kim reports financial support was provided by Korea Ministry of Science and ICT., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
45. Recyclable mesalamine-functionalized magnetic nanoparticles (mesalamine/GPTMS@SiO 2 @Fe 3 O 4 ) for tandem Knoevenagel-Michael cyclocondensation: grinding technique for the synthesis of biologically active 2-amino-4 H -benzo[ b ]pyran derivatives.
- Author
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Partovi M, Rezayati S, Ramazani A, Ahmadi Y, and Taherkhani H
- Abstract
In the present study, mesalamine-functionalized on magnetic nanoparticles (mesalamine/GPTMS@SiO
2 @Fe3 O4 ) is fabricated as an efficient and magnetically recoverable nanocatalyst. The as-prepared nanocatalyst was successfully synthesized in three steps using a convenient and low-cost method via modification of the surface of Fe3 O4 nanoparticles with silica and GPTMS, respectively, to afford GPTMS@SiO2 @Fe3 O4 . Finally, treatment with mesalamine as a powerful antioxidant generates the final nanocatalyst. Then, its structure was characterized by FT-IR, SEM, TEM, EDX, XRD, BET, VSM, and TGA techniques. The average size was found to be approximately 38 nm using TEM analysis and the average crystallite size was found to be approximately 27.02 nm using XRD analysis. In particular, the synthesized nanocatalyst exhibited strong thermal stability up to 400 °C and high magnetization properties. The activity of the synthesized nanocatalyst was evaluated in the tandem Knoevenagel-Michael cyclocondensation of various aromatic aldehydes, dimedone and malononitrile under a dry grinding method at room temperature to provide biologically active 2-amino-4 H -benzo[ b ]pyran derivatives products in a short time with good yields. The presented procedure offers several advantages including gram-scale synthesis, good green chemistry metrics (GCM), easy fabrication of the catalyst, atom economy (AE), no use of column chromatography, and avoiding the generation of toxic materials. Furthermore, the nanocatalyst can be reused for 8 cycles with no loss of performance by using an external magnet., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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46. Schiff base-functionalized metal-organic frameworks as an efficient adsorbent for the decontamination of heavy metal ions in water.
- Author
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Kaur M, Kumar S, Yusuf M, Lee J, Malik AK, Ahmadi Y, and Kim KH
- Subjects
- Water, Schiff Bases chemistry, Decontamination, Adsorption, Metal-Organic Frameworks, Metals, Heavy chemistry, Water Pollutants, Chemical analysis
- Abstract
Adsorptive removal of heavy metal ions from water is an energy- and cost-effective water decontamination technology. Schiff base functionalities can be incorporated into the pore cages of metal-organic frameworks (MOFs) via direct synthesis, post-synthetic modification, and composite formation. Such incorporation can efficiently enhance the interactions between the MOF adsorbent and target heavy metal ions to promote the selective adsorption of the latter. Accordingly, Schiff base-functionalized MOFs have great potential to selectively remove a particular metal ion from the aqueous solutions in the presence of coexisting (interfering) metal ions through the binding sites within their pore cages. Schiff base-functionalized MOFs can bind divalent metal ions (e.g., Pb(II), Co(II), Cu(II), Cd (II), and Hg (II)) more strongly than trivalent metal ions (e.g., Cr(III)). The adsorption capacity range of Schiff base-functionalized MOFs for divalent ions is thus much more broad (22.4-713 mg g
-1 ) than that of trivalent metal ions (118-127 mg g-1 ). To evaluate the adsorption performance between different adsorbents, the two parameters (i.e., adsorption capacity and partition coefficient (PC)) are derived and used for comparison. Further, the possible interactions between the Schiff base sites and the target heavy metal ions are discussed to help understand the associated removal mechanisms. This review delivers actionable knowledge for developing Schiff-base functionalized MOFs toward the adsorptive removal of heavy metal ions in water in line with their performance evaluation and associated removal mechanisms. Finally, this review highlights the challenges and forthcoming research and development needs of Schiff base-functionalized MOFs for diverse fields of operations., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)- Published
- 2023
- Full Text
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47. Autosomal Dominant Intellectual Development Disorder-6 (MRD6) Without Seizures Linked to a De Novo Mutation in the grin2b Gene Revealed by Exome Sequencing: A Case Report of a Moroccan Child.
- Author
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El Mouhi H, Abbassi M, Sayel H, Trhanint S, Natiq A, El Hejjioui B, Jalte M, Ahmadi Y, and Chaouki S
- Abstract
Autosomal dominant intellectual development disorder-6 (MRD6) arises from a grin2b gene mutation, inducing neurodevelopmental issues. The effects of MRD6 encompass cognitive disabilities, seizures, muscle tone decline, and autism-like traits. Its severity ranges from mild impairment to severe epilepsy. The disorder's rarity is emphasized by roughly 100 reported GRIN2B-related cases, spotlighting the gene's significance in brain development. We present the case of a three-year-old Moroccan boy who was referred to a neuropediatric department for a molecular diagnosis. Initial genetic testing yielded inconclusive results, and subsequent tests for Angelman syndrome and metabolic diseases showed no abnormalities. Given the complexity of the disorder, exome sequencing was employed to identify the underlying genetic cause. Exome sequencing identified a nonsense (STOP) mutation c.3912C>G (p.Tyr1304Ter) in the grin2b gene in the heterozygous state known to be present in MRD6 (Online Mendelian Inheritance in Man (OMIM) 613970). The family segregation study shows that this is a de novo variant, which is confirmed by Sanger sequencing. This variant has not been previously reported in the GnomAD database. Based on current scientific knowledge, the variant is considered pathogenic (PVS1, PS2, PM2, PP3, PP5) according to the criteria of the American College of Medical Genetics and Genomics (ACMG). The mutation in the grin2b gene (p.Tyr1304Ter) was predicted to be deleterious through bioinformatics analysis tools. This study highlights the crucial role of the grin2b gene in normal brain development and communication within the nervous system. It also sheds light on the impact of a novel genetic mutation, identified through exome sequencing, on causing an intellectual developmental disorder in a child patient from Morocco., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, El Mouhi et al.)
- Published
- 2023
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48. A Narrative Review of Parameters Influencing Preeclampsia in the COVID-19 Era.
- Author
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Modi NM, Afrah H, Baldeon Chavez O, Barboza Rojas MD, Lapsiwala BJ, Ahmadi Y, Moonnumackel SJ, and Nair A
- Abstract
The COVID-19 outbreak has emerged as one of the most profound medical events of the 21st century, leaving an indelible impact on a global scale. The widespread prevalence causing significant illness and death needs collaborative and inventive efforts to deal with this challenge. One of the particular subset of the general population that had endured a significant impact was the pregnant population. A key complication of pregnancy seen in patients with a COVID-19 infection was the increased risk of developing preeclampsia. The angiotensin-converting enzyme 2 (ACE2) receptor is an important part of the renin-angiotensin system, which has been implicated in the control of blood flow and also is a key receptor in the pathogenesis of the multitude of symptoms of COVID-19. This study aimed to evaluate the psychiatric, hematological, neurological, and social factors influenced by the COVID-19 virus and its subsequent effect on the development of preeclampsia. Increased rates of anxiety and depression were seen globally during the COVID-19 pandemic and due to the following physiological response of anxiety and depression, elevated blood pressure levels and development of preeclampsia were noted. Neurological factors such as the development of posterior reversible encephalopathy syndrome and its relationship between COVID-19 and preeclampsia were also strongly observed. The observation suggested biomarkers such as serum neurofilament light may be used as a screening tool to stratify the severity of preeclampsia. Hematological parameters observed were most notable for the presence of thrombocytopenia, which itself is a marker of the severity of preeclampsia. The numerous effects of COVID-19 on preeclampsia have proven to have a tremendous impact on the healthcare burden. Careful analysis and prevention strategies, if implemented, will contribute to reducing the morbidity and mortality of patients with preeclampsia and COVID-19 infections., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Modi et al.)
- Published
- 2023
- Full Text
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49. Application of Green Polymeric Nanocomposites for Enhanced Oil Recovery by Spontaneous Imbibition from Carbonate Reservoirs.
- Author
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Ahmadi Y, Ayari MA, Olfati M, Hosseini SH, Khandakar A, Vaferi B, and Olazar M
- Abstract
This study experimentally investigates the effect of green polymeric nanoparticles on the interfacial tension (IFT) and wettability of carbonate reservoirs to effectively change the enhanced oil recovery (EOR) parameters. This experimental study compares the performance of xanthan/magnetite/SiO
2 nanocomposites (NC) and several green materials, i.e., eucalyptus plant nanocomposites (ENC) and walnut shell ones (WNC) on the oil recovery with performing series of spontaneous imbibition tests. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDAX), and BET (Brunauer, Emmett, and Teller) surface analysis tests are also applied to monitor the morphology and crystalline structure of NC, ENC, and WNC. Then, the IFT and contact angle (CA) were measured in the presence of these materials under various reservoir conditions and solvent salinities. It was found that both ENC and WNC nanocomposites decreased CA and IFT, but ENC performed better than WNC under different salinities, namely, seawater (SW), double diluted salted (2 SW), ten times diluted seawater (10 SW), formation water (FW), and distilled water (DIW), which were applied at 70 °C, 2000 psi, and 0.05 wt.% nanocomposites concentration. Based on better results, ENC nanofluid at salinity concentrations of 10 SW and 2 SW ENC were selected for the EOR of carbonate rocks under reservoir conditions. The contact angles of ENC nanocomposites at the salinities of 2 SW and 10 SW were 49 and 43.4°, respectively. Zeta potential values were -44.39 and -46.58 for 2 SW and 10 SW ENC nanofluids, which is evidence of the high stability of ENC nanocomposites. The imbibition results at 70 °C and 2000 psi with 0.05 wt.% ENC at 10 SW and 2 SW led to incremental oil recoveries of 64.13% and 60.12%, respectively, compared to NC, which was 46.16%.- Published
- 2023
- Full Text
- View/download PDF
50. Thermocatalytic Degradation of Gaseous Formaldehyde Using Transition Metal-Based Catalysts.
- Author
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Hua Y, Ahmadi Y, and Kim KH
- Abstract
Formaldehyde (HCHO: FA) is one of the most abundant but hazardous gaseous pollutants. Transition metal oxide (TMO)-based thermocatalysts have gained much attention in its removal due to their excellent thermal stability and cost-effectiveness. Herein, a comprehensive review is offered to highlight the current progress in TMO-based thermocatalysts (e.g., manganese, cerium, cobalt, and their composites) in association with the strategies established for catalytic removal of FA. Efforts are hence made to describe the interactive role of key factors (e.g., exposed crystal facets, alkali metal/nitrogen modification, type of precursors, and alkali/acid treatment) governing the catalytic activity of TMO-based thermocatalysts against FA. Their performance has been evaluated further between two distinctive operation conditions (i.e., low versus high temperature) based on computational metrics such as reaction rate. Accordingly, the superiority of TMO-based composite catalysts over mono- and bi-metallic TMO catalysts is evident to reflect the abundant surface oxygen vacancies and enhanced FA adsorptivity of the former group. Finally, the present challenges and future prospects for TMO-based catalysts are discussed with respect to the catalytic oxidation of FA. This review is expected to offer valuable information to design and build high performance catalysts for the efficient degradation of volatile organic compounds., (© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.)
- Published
- 2023
- Full Text
- View/download PDF
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