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18. Earth and Space Science Informatics Perspectives on Integrated, Coordinated, Open, Networked (ICON) Science.

Author

Hills, D. J., Damerow, J. E., Ahmmed, B., Catolico, N., Chakraborty, S., Coward, C. M., Crystal‐Ornelas, R., Duncan, W. D., Goparaju, L. N., Lin, C., Liu, Z., Mudunuru, M. K., Rao, Y., Rovetto, R. J., Sun, Z., Whitehead, B. P., Wyborn, L., and Yao, T.

Subjects
SPACE sciences, EARTH sciences, MULTISCALE modeling, INFORMATION modeling, DATA management, MACHINE learning, MEDICAL informatics
Abstract

This article is composed of three independent commentaries about the state of Integrated, Coordinated, Open, Networked (ICON) principles (Goldman, et al., 2021b, https://doi.org/10.1029/2021EO153180) in Earth and Space Science Informatics (ESSI) and includes discussion on the opportunities and challenges of adopting them. Each commentary focuses on a different topic: (Section 2) Global collaboration, cyberinfrastructure, and data sharing; (Section 3) Machine learning for multiscale modeling; (Section 4) Aerial and satellite remote sensing for advancing Earth system model development by integrating field and ancillary data. ESSI addresses data management practices, computation and analysis, and hardware and software infrastructure. Our role in ICON science therefore involves collaborative work to assess, design, implement, and promote practices and tools that enable effective data management, discovery, integration, and reuse for interdisciplinary work in Earth and space science disciplines. Networks of diverse people with expertise across Earth, space, and data science disciplines are essential for efficient and ethical exchanges of findable, accessible, interoperable, and reusable (FAIR) research products and practices. Our challenge is then to coordinate the development of standards, curation practices, and tools that enable integrating and reusing multiple data types, software, multi‐scale models, and machine learning approaches across disciplines in a way that is as open and/or FAIR as ethically possible. This is a major endeavor that could greatly increase the pace and potential of interdisciplinary scientific discovery. Plain Language Summary: We present commentaries on the state of "Integrated, Coordinated, Open, Networked (ICON) principles" in Earth and Space Science Informatics. ICON principles are meant to improve the research experience for all. Ultimately, data standardized according to community conventions and formats lead to more effective and efficient collaboration, data discovery, integration, and analyses. Data standards, tools, and machine learning developed using ICON principles enhance our understanding of Earth processes. Using ICON principles improves model results and efficacy, fosters interdisciplinary research, and provides a framework by which non‐experts can confidently contribute volunteered data and findings. Standardized data also provides reliable common resources to help train and benchmark machine learning algorithms. When networked communities work together to standardize and share data openly, the resulting web of research products is more readily findable, accessible, interoperable, and reusable. Ongoing support is crucial to develop and sustain the people, systems, and tools necessary to embrace ICON principles in Earth and Space Science Informatics now and in the future. Key Points: Networks across communities, with Coordinated data and information modeling practices, improve scientific outcomes for all involvedIntegrated, Coordinated, and Open data requires sustainable support to create and maintain infrastructure for interdisciplinary NetworksIntegrated and Coordinated use of data in machine learning calls for Open benchmark datasets shared across Networks for improved outcomes [ABSTRACT FROM AUTHOR]

Published
2022
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19. Oxidation behaviour of borided Incoloy 909.

Author

Gaona-Martínez, M. J., Puente-Ornelas, R., Gallardo-Hernández, E. A., Ramírez-Ramírez, J. H., Pérez-González, F. A., Colás, R., and Garza-Montes-de-Oca, N. F.

Subjects
OXIDATION, OXIDATION kinetics, ACTIVATION energy
Abstract

The oxidation behaviour of Incoloy 909 superalloy subjected to diffusion boronizing treatments was studied at 750 and 850°C in atmospheres of dry air and a mixture of dry air + water vapour for times up to 10 h. The oxidation behaviour of the coated samples was described by the parabolic rate law with activation energies of 26 and 21 kJ mol−1 when oxidation was conducted in dry air or in the mixture dry air + water vapour respectively. Oxidation kinetics of the boronized coatings were sensitive to temperature and the oxidation environment promoting the development of a thick SiO2 layer on top of the coatings which also included minor additions of other oxides that acted as a barrier that reduced oxidation. However, in the conditions that included water vapour boron-rich oxides were also formed and a different oxidation behaviour was experienced. [ABSTRACT FROM AUTHOR]

Published
2020
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20. NONFERROUS WASTE FOUNDRY SAND AND MILLING FLY ASH AS ALTERNATIVE LOW MECHANICAL STRENGTH MATERIALS FOR CONSTRUCTION INDUSTRY: EFFECT ON MORTARS AT EARLY AGES.

Author

VÁZQUEZ-RODRIGUEZ, F. J., VALADEZ-RAMOS, J., PUENTE-ORNELAS, R., CONTRERAS, J. E., ARATO, A., and RODRÍGUEZ, EDÉN A.

Subjects
FLY ash, FOUNDRY waste, MECHANICAL behavior of materials, CONSTRUCTION industry, NONFERROUS metals
Abstract

An alternative solution to reduce environmental pollution using aluminum waste foundry sand (AWFS) and fly ash (FA) to produce sustainable construction materials was studied. New mortars were prepared by partially replacing ordinary Portland cement with fly ash at 5, 10 and 15 % mass. and a total replace of Ottawa sand (OS) with AWFS. The specimens were cured at 25°C with a 100% relative humidity. The mechanical behavior was evaluated by compression test at the ages of 7, 14 and 28 days. The microstructural characteristics were analyzed by scanning electron microscopy (SEM). The results indicate that the addition of milling fly ash in AWFS mortars increases the mechanical resistance, mostly at 5% mass reaching the maximum value of 10 MPa at 28 days of age. Microstructurally, it was found a porous cement matrix with some cracking caused by the reaction of portland cement with the metallic aluminum remaining in the waste sand, which is correlated to the low mechanical resistance obtained. The final mechanical characteristic makes this new product a serious candidate to be used as a sustainable building material working at low load. [ABSTRACT FROM AUTHOR]

Published
2018

21. Progress in development of copper antimony sulfide thin films as an alternative material for solar energy harvesting.

Author

Krishnan, B., Shaji, S., and Ernesto Ornelas, R.

Subjects
THIN films, HAZARDOUS substances, PHOTOVOLTAIC power generation, OPTOELECTRONICS, SOLAR cells
Abstract

The increasing energy demand and the limitations of the existing technologies due to the scarcity, cost and toxicity of the materials urge the researchers to hunt for efficient thin film solar cells based on earth-abundant, inexpensive and less toxic materials. For a decade, binary and ternary antimony based sulfides have gained attention due to their possible applications in solar cells. This interest is the basis of this review. In this review article, we describe basic properties of copper antimony sulfide (CuSbS) thin films to investigate their photovoltaic applications. A detailed description of the preparation methods, studies on morphologies and optoelectronic properties based on published work, including our experience are presented. A systematic review is done to demonstrate emerging interest in the photovoltaic performance of this compound. This review gives an in depth discussion on the structure, morphology, optical and electrical properties of copper antimony sulfide thin films. [ABSTRACT FROM AUTHOR]

Published
2015
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22. EFFECT OF THE IRON ORE ON MICROSTRUCTURAL CHANGES OF A REFRACTORY CONCRETE MAGNESIUM ALUMINATE BASE.

Author

Puente-Ornelas, R., Zambrano, P. C., Frausto-Reyes, C., Rodríguez, E., Lizcano-Zuláica, C. J., Guzmán, A. M., Trujillo-Sánchez, G., and Delgadillo-Guerra, H. M.

Subjects
*IRON ores, *MICROSTRUCTURE, *REFRACTORY materials, *CONCRETE, *SPINEL, *X-ray diffraction
Abstract

In this study, it was evaluated the chemical interaction between iron ore (Fe2O3) and a refractory concrete based on Al2O3- MgAl2O4 at 1650 °C for 4 h using an air atmosphere, in order to determine the chemical behavior and possible reactions between these materials. After testing, the refractory concrete was microstructurally characterized by optical microscopy and scanning electron microscopy (SEM-EDS), as well as X-ray diffraction and Raman spectroscopy. The results showed that magnesium aluminate phase incorporates in solid solution Fe+2 ions, resulting in the formation of (Fe, Mg) (Al2O4) spinels and after their saturation, the rest of Fe+2 ions tends to precipitate at the grain boundaries of alumina and magnesium aluminate phases. This fact promotes during the concrete cooling, the formation of wustite, hematite and magnetite phases (detected in the microstructure as a dendritic and widmanstätten morphologies). The presence of hematite phase was corroborated by X-ray diffraction; likewise the presence of modified spinel phase whose hkl reflections width is higher compared with the original spinel, due to the incorporation of Fe+2 in the initial MgAl2O4 phase. For Raman spectroscopy, it was confirmed the presence of corundum (alumina) phase at characteristic frequencies of 378, 416 and 644 cm-1, hematite phase at 226, 292, 411 and 612 cm-1, magnetite phase at 520 and 668 cm-1 and spinel MgAl2O4 and (Fe, Mg) (Al2O4) ) with its main frequencies at 406 and 666 major cm-1. [ABSTRACT FROM AUTHOR]

Published
2012

23. Investigation of IrO2/Pt Electrocatalysts in Unitized Regenerative Fuel Cells.

Author

Baglio, V., D'Urso, C., Di Blasi, A., Ornelas, R., Arriaga, L. G., Antonucci, V., and Aricò, A. S.

Abstract

IrO2/Pt catalysts (at different concentrations) were synthesized by incipient wetness technique and characterized by XRD, XRF, and SEM. Water electrolysis/fuel cell performances were evaluated in a 5 cm2 single cell under Unitized Regenerative Fuel Cell (URFC) configuration. The IrO2/Pt composition of 14/86 showed the highest performance for water electrolysis and the lowest one as fuel cell. It is derived that for fuel cell operation an excess of Pt favours the oxygen reduction process whereas IrO2 promotes oxygen evolution. From the present results, it appears that the diffusion characteristics and the reaction rate in fuel cell mode are significantly lower than in the electrolyser mode. This requires the enhancement of the gas diffusion properties of the electrodes and the catalytic properties for cathode operation in fuel cells. [ABSTRACT FROM AUTHOR]

Published
2011
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25. Preparation and evaluation of RuO2–IrO2, IrO2–Pt and IrO2–Ta2O5 catalysts for the oxygen evolution reaction in an SPE electrolyzer.

Author

Di Blasi, A., D’Urso, C., Baglio, V., Antonucci, V., Arico’, A., Ornelas, R., Matteucci, F., Orozco, G., Beltran, D., Meas, Y., and Arriaga, L.

Subjects
ELECTROCATALYSIS, ELECTROLYTIC cells, RUTHENIUM compounds, IRIDIUM, PLATINUM compounds, WATER electrolysis, CATALYSTS
Abstract

IrO2–RuO2, IrO2–Pt and IrO2–Ta2O5 electrocatalysts were synthesized and characterized for the oxygen evolution in a Solid Polymer Electrolyte (SPE) electrolyzer. These mixtures were characterized by XRD and SEM. The anode catalyst powders were sprayed onto Nafion 117 membrane (catalyst coated membrane, CCM), using Pt catalyst at the cathode. The CCM procedure was extended to different in-house prepared catalyst formulations to evaluate if such a method could be applied to electrolyzers containing durable titanium backings. The catalyst loading at the anode was about 6 mg cm−2, whereas 1 mg cm−2 Pt was used at the cathode. The electrochemical activity for water electrolysis was investigated in a single cell SPE electrolyzer at 80 °C. It was found that the terminal voltage obtained with Ir–Ta oxide was slightly lower than that obtained with IrO2–Pt and IrO2–RuO2 at low current density (lower than 0.15 A cm−2). At higher current density, the IrO2–Pt and IrO2–RuO2 catalysts performed better than Ir–Ta oxide. [ABSTRACT FROM AUTHOR]

Published
2009
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26. Development of Pt and Pt-Fe Catalysts Supported on Multiwalled Carbon Nanotubes for Oxygen Reduction in Direct Methanol Fuel Cells.

Author

Baglio, V., Di Blasi, A., D'Urso, C., Aricò, V., Aricò, A. S., Ornelas, R., Morales.Acosta, D., Ledesma-Garcia, J., Godinez, L. A., Arriaga, L. G., and Alvarez-Contreras, L.

Subjects
CARBON nanotubes, FUEL cells, TRANSMISSION electron microscopy, CATHODE rays, FULLERENES, CHEMICAL reactions, ELECTRIC batteries
Abstract

Pt and Pt-Fe catalysts supported on multiwalled carbon nanotubes (MWCNTs) were prepared by impregnation and reduction at intermediate temperature (400°C). The MWCNTs with diameters ranging from 20 to 100 nm were synthesized by a spray pyrolysis technique. Pt/MWCNTs and Pt-Fe/MWCNT catalysts were characterized by X-ray diffraction, X-ray fluorescence, scanning electron microscope-energy dispersive X-ray analysis, and transmission electron microscopy techniques. The electro-catalytic behavior for the oxygen reduction reaction was investigated in rotating disk electrode configuration in an acidic medium, also in the presence of various methanol concentrations (0.01, 0.1, and 1 M). An anodic shift of the peak potential for methanol oxidation of ~150 mV was observed in the presence of 1 M methanol concentration for the Pt-Fe catalyst compared to the Pt catalyst. Both materials were used as cathodes in a direct methanol fuel cell at 30 and 60°C. A better performance was obtained for the cell based on Pt-Fe/MCWNTs as cathode catalyst. Although slight iron dissolution was observed after two weeks of discontinuous operation, the performance of the Pt-Fe catalyst was larger than the Pt catalyst. [ABSTRACT FROM AUTHOR]

Published
2008
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28. Height and body-mass index trajectories of school-aged children and adolescents from 1985 to 2019 in 200 countries and territories: a pooled analysis of 2181 population-based studies with 65 million participants

Author

Rodriguez-Martinez, Andrea, Zhou, Bin, Sophiea, Marisa K, Bentham, James, Paciorek, Christopher J, Iurilli, Maria LC, Carrillo-Larco, Rodrigo M, Bennett, James E, Di Cesare, Mariachiara, Taddei, Cristina, Bixby, Honor, Stevens, Gretchen A, Riley, Leanne M, Cowan, Melanie J, Savin, Stefan, Danaei, Goodarz, Chirita-Emandi, Adela, Kengne, Andre P, Khang, Young-Ho, Laxmaiah, Avula, Malekzadeh, Reza, Miranda, J Jaime, Moon, Jin Soo, Popovic, Stevo R, Sorensen, Thorkild IA, Soric, Maroje, Starc, Gregor, Zainuddin, Ahmad A, Gregg, Edward W, Bhutta, Zulfiqar A, Black, Robert, Ezzati, Majid, Abarca-Gomez, Leandra, Abdeen, Ziad A, Abdrakhmanova, Shynar, Ghaffar, Suhaila Abdul, Rahim, Hanan F Abdul, Abu-Rmeileh, Niveen M, Garba, Jamila Abubakar, Acosta-Cazares, Benjamin, Adams, Robert J, Aekplakorn, Wichai, Afsana, Kaosar, Afzal, Shoaib, Agdeppa, Imelda A, Aghazadeh-Attari, Javad, Aguilar-Salinas, Carlos A, Agyemang, Charles, Ahmad, Mohamad Hasnan, Ahmad, Noor Ani, Ahmadi, Ali, Ahmadi, Naser, Ahmed, Soheir H, Ahrens, Wolfgang, Aitmurzaeva, Gulmira, Ajlouni, Kamel, Al-Hazzaa, Hazzaa M, Al-Othman, Amani Rashed, Al-Raddadi, Rajaa, Alarouj, Monira, AlBuhairan, Fadia, AlDhukair, Shahla, Ali, Mohamed M, Alkandari, Abdullah, Alkerwi, Ala'a, Allin, Kristine, Alvarez-Pedrerol, Mar, Aly, Eman, Amarapurkar, Deepak N, Amiri, Parisa, Amougou, Norbert, Amouyel, Philippe, Andersen, Lars Bo, Anderssen, Sigmund A, Angquist, Lars, Anjana, Ranjit Mohan, Ansari-Moghaddam, Alireza, Aounallah-Skhiri, Hajer, Araujo, Joana, Ariansen, Inger, Aris, Tahir, Arku, Raphael E, Arlappa, Nimmathota, Aryal, Krishna K, Aspelund, Thor, Assah, Felix K, Assuncao, Maria Cecilia F, Aung, May Soe, Auvinen, Juha, Avdicova, Maria, Azevedo, Ana, Azimi-Nezhad, Mohsen, Azizi, Fereidoun, Azmin, Mehrdad, Babu, Bontha V, Jorgensen, Maja Baeksgaard, Baharudin, Azli, Bahijri, Suhad, Baker, Jennifer L, Balakrishna, Nagalla, Bamoshmoosh, Mohamed, Banach, Maciej, Bandosz, Piotr, Banegas, Jose R, Baran, Joanna, Barbagallo, Carlo M, Barcelo, Alberto, Barkat, Amina, Barros, Aluisio JD, Barros, Mauro Virgilio Gomes, Basit, Abdul, Bastos, Joao Luiz D, Bata, Iqbal, Batieha, Anwar M, Batista, Rosangela L, Battakova, Zhamilya, Batyrbek, Assembekov, Baur, Louise A, Beaglehole, Robert, Bel-Serrat, Silvia, Belavendra, Antonisamy, Ben Romdhane, Habiba, Benedics, Judith, Benet, Mikhail, Berkinbayev, Salim, Bernabe-Ortiz, Antonio, Bernotiene, Gailute, Bettiol, Heloisa, Bezerra, Jorge, Bhagyalaxmi, Aroor, Bharadwaj, Sumit, Bhargava, Santosh K, Bi, Hongsheng, Bi, Yufang, Bia, Daniel, Lele, Elysee Claude Bika, Bikbov, Mukharram M, Bista, Bihungum, Bjelica, Dusko J, Bjerregaard, Peter, Bjertness, Espen, Bjertness, Marius B, Bjorkelund, Cecilia, Bloch, Katia V, Blokstra, Anneke, Bo, Simona, Bobak, Martin, Boddy, Lynne M, Boehm, Bernhard O, Boeing, Heiner, Boggia, Jose G, Bogova, Elena, Boissonnet, Carlos P, Bojesen, Stig E, Bonaccio, Marialaura, Bongard, Vanina, Bonilla-Vargas, Alice, Bopp, Matthias, Borghs, Herman, Bovet, Pascal, Braeckevelt, Lien, Braeckman, Lutgart, Bragt, Marjolijn CE, Brajkovich, Imperia, Branca, Francesco, Breckenkamp, Juergen, Breda, Joao, Brenner, Hermann, Brewster, Lizzy M, Brian, Garry R, Brinduse, Lacramioara, Brophy, Sinead, Bruno, Graziella, Bueno-de-Mesquita, H Bas, Bugge, Anna, Buoncristiano, Marta, Burazeri, Genc, Burns, Con, de Leon, Antonio Cabrera, Cacciottolo, Joseph, Cai, Hui, Cama, Tilema, Cameron, Christine, Camolas, Jose, Can, Gunay, Candido, Ana Paula C, Canete, Felicia, Capanzana, Mario V, Capkova, Nadezda, Capuano, Eduardo, Capuano, Vincenzo, Cardol, Marloes, Cardoso, Viviane C, Carlsson, Axel C, Carmuega, Esteban, Carvalho, Joana, Casajus, Jose A, Casanueva, Felipe F, Celikcan, Ertugrul, Censi, Laura, Cervantes-Loaiza, Marvin, Cesar, Juraci A, Chamukuttan, Snehalatha, Chan, Angelique W, Chan, Queenie, Chaturvedi, Himanshu K, Chaturvedi, Nish, Rahim, Norsyamlina Che Abdul, Chen, Chien-Jen, Chen, Fangfang, Chen, Huashuai, Chen, Shuohua, Chen, Zhengming, Cheng, Ching-Yu, Cheraghian, Bahman, Chetrit, Angela, Chikova-Iscener, Ekaterina, Chiolero, Arnaud, Chiou, Shu-Ti, Chirlaque, Maria-Dolores, Cho, Belong, Christensen, Kaare, Christofaro, Diego G, Chudek, Jerzy, Cifkova, Renata, Cilia, Michelle, Cinteza, Eliza, Claessens, Frank, Clarke, Janine, Clays, Els, Cohen, Emmanuel, Concin, Hans, Confortin, Susana C, Cooper, Cyrus, Coppinger, Tara C, Corpeleijn, Eva, Costanzo, Simona, Cottel, Dominique, Cowell, Chris, Craig, Cora L, Crampin, Amelia C, Crujeiras, Ana B, Csilla, Semanova, Cucu, Alexandra M, Cui, Liufu, Cureau, Felipe V, D'Arrigo, Graziella, d'Orsi, Eleonora, Dacica, Liliana, Saavedra, Maria Angeles Dal Re, Dallongeville, Jean, Damasceno, Albertino, Damsgaard, Camilla T, Dankner, Rachel, Dantoft, Thomas M, Dasgupta, Parasmani, Dastgiri, Saeed, Dauchet, Luc, Davletov, Kairat, De Backer, Guy, De Bacquer, Dirk, de Gaetano, Giovanni, De Henauw, Stefaan, de Oliveira, Paula Duarte, De Ridder, David, De Ridder, Karin, de Rooij, Susanne R, De Smedt, Delphine, Deepa, Mohan, Deev, Alexander D, DeGennaro, Vincent, Dehghan, Abbas, Delisle, Helene, Delpeuch, Francis, Demarest, Stefaan, Dennison, Elaine, Deren, Katarzyna, Deschamps, Valerie, Dhana, Klodian, Dhimal, Meghnath, Di Castelnuovo, Augusto F, Dias-da-Costa, Juvenal Soares, Diaz-Sanchez, Maria Elena, Diaz, Alejandro, Dika, Zivka, Djalalinia, Shirin, Djordjic, Visnja, Do, Ha TP, Dobson, Annette J, Donati, Maria Benedetta, Donfrancesco, Chiara, Donoso, Silvana P, Doring, Angela, Dorobantu, Maria, Dorosty, Ahmad Reza, Doua, Kouamelan, Drygas, Wojciech, Duan, Jia Li, Duante, Charmaine A, Duboz, Priscilla, Duda, Rosemary B, Duleva, Vesselka, Dulskiene, Virginija, Dumith, Samuel C, Dushpanova, Anar, Dzerve, Vilnis, Dziankowska-Zaborszczyk, Elzbieta, Eddie, Ricky, Eftekhar, Ebrahim, Egbagbe, Eruke E, Eggertsen, Robert, Eghtesad, Sareh, Eiben, Gabriele, Ekelund, Ulf, El-Khateeb, Mohammad, El Ati, Jalila, Eldemire-Shearer, Denise, Eliasen, Marie, Elliott, Paul, Engle-Stone, Reina, Enguerran, Macia, Erasmus, Rajiv T, Erbel, Raimund, Erem, Cihangir, Eriksen, Louise, Eriksson, Johan G, Escobedo-de la Pena, Jorge, Eslami, Saeid, Esmaeili, Ali, Evans, Alun, Faeh, David, Fakhretdinova, Albina A, Fall, Caroline H, Faramarzi, Elnaz, Farjam, Mojtaba, Sant'Angelo, Victoria Farrugia, Farzadfar, Farshad, Fattahi, Mohammad Reza, Fawwad, Asher, Felix-Redondo, Francisco J, Ferguson, Trevor S, Fernandes, Romulo A, Fernandez-Berges, Daniel, Ferrante, Daniel, Ferrao, Thomas, Ferrari, Marika, Ferrario, Marco M, Ferreccio, Catterina, Ferrer, Eldridge, Ferrieres, Jean, Figueiro, Thamara Hubler, Fijalkowska, Anna, Fink, Gunther, Fischer, Krista, Foger, Bernhard, Foo, Leng Huat, Forsner, Maria, Fouad, Heba M, Francis, Damian K, Franco, Maria do Carmo, Franco, Oscar H, Frikke-Schmidt, Ruth, Frontera, Guillermo, Fuchs, Flavio D, Fuchs, Sandra C, Fujiati, Isti I, Fujita, Yuki, Fumihiko, Matsuda, Furusawa, Takuro, Gaciong, Zbigniew, Gafencu, Mihai, Galbarczyk, Andrzej, Galenkamp, Henrike, Galeone, Daniela, Galfo, Myriam, Galvano, Fabio, Gao, Jingli, Garcia-de-la-Hera, Manoli, Garcia-Solano, Marta, Gareta, Dickman, Garnett, Sarah P, Gaspoz, Jean-Michel, Gasull, Magda, Gaya, Adroaldo Cesar Araujo, Gaya, Anelise Reis, Gazzinelli, Andrea, Gehring, Ulrike, Geiger, Harald, Geleijnse, Johanna M, Ghanbari, Ali, Ghasemi, Erfan, Gheorghe-Fronea, Oana-Florentina, Giampaoli, Simona, Gianfagna, Francesco, Gill, Tiffany K, Giovannelli, Jonathan, Gironella, Glen, Giwercman, Aleksander, Gkiouras, Konstantinos, Godos, Justyna, Gogen, Sibel, Goldsmith, Rebecca A, Goltzman, David, Gomez, Santiago F, Gomula, Aleksandra, da Silva, Bruna Goncalves Cordeiro, Goncalves, Helen, Gonzalez-Chica, David A, Gonzalez-Gross, Marcela, Gonzalez-Leon, Margot, Gonzalez-Rivas, Juan P, Gonzalez-Villalpando, Clicerio, Gonzalez-Villalpando, Maria-Elena, Gonzalez, Angel R, Gottrand, Frederic, Graca, Antonio Pedro, Graff-Iversen, Sidsel, Grafnetter, Dusan, Grajda, Aneta, Grammatikopoulou, Maria G, Gregor, Ronald D, Grodzicki, Tomasz, Groholt, Else Karin, Grontved, Anders, Grosso, Giuseppe, Gruden, Gabriella, Gu, Dongfeng, Gualdi-Russo, Emanuela, Guallar-Castillon, Pilar, Gualtieri, Andrea, Gudmundsson, Elias F, Gudnason, Vilmundur, Guerrero, Ramiro, Guessous, Idris, Guimaraes, Andre L, Gulliford, Martin C, Gunnlaugsdottir, Johanna, Gunter, Marc J, Guo, Xiu-Hua, Guo, Yin, Gupta, Prakash C, Gupta, Rajeev, Gureje, Oye, Gurzkowska, Beata, Gutierrez-Gonzalez, Enrique, Gutierrez, Laura, Gutzwiller, Felix, Ha, Seongjun, Hadaegh, Farzad, Hadjigeorgiou, Charalambos A, Haghshenas, Rosa, Hakimi, Hamid, Halkjaer, Jytte, Hambleton, Ian R, Hamzeh, Behrooz, Hange, Dominique, Hanif, Abu AM, Hantunen, Sari, Kumar, Rachakulla Hari, Hashemi-Shahri, Seyed Mohammad, Hassapidou, Maria, Hata, Jun, Haugsgjerd, Teresa, Hayes, Alison J, He, Jiang, He, Yuan, He, Yuna, Heidinger-Felso, Regina, Heinen, Mirjam, Hejgaard, Tatjana, Hendriks, Marleen Elisabeth, Henrique, Rafael dos Santos, Henriques, Ana, Cadena, Leticia Hernandez, Herrala, Sauli, Herrera, Victor M, Herter-Aeberli, Isabelle, Heshmat, Ramin, Hill, Allan G, Ho, Sai Yin, Ho, Suzanne C, Hobbs, Michael, Hofman, Albert, Bergh, Ingunn Holden, Holdsworth, Michelle, Homayounfar, Reza, Homs, Clara, Hopman, Wilma M, Horimoto, Andrea RVR, Hormiga, Claudia M, Horta, Bernardo L, Houti, Leila, Howitt, Christina, Thein, Thein Htay, Htet, Aung Soe, Htike, Maung Maung Than, Hu, Yonghua, Huerta, Jose Maria, Huhtaniemi, Ilpo Tapani, Petrescu, Constanta Huidumac, Husseini, Abdullatif, Chinh, Nguyen Huu, Huybrechts, Inge, Hwalla, Nahla, Hyska, Jolanda, Iacoviello, Licia, Ibarluzea, Jesus M, Ibrahim, Mohsen M, Wong, Norazizah Ibrahim, Ikeda, Nayu, Ikram, M Arfan, Iotova, Violeta, Irazola, Vilma E, Ishida, Takafumi, Islam, Muhammad, Islam, Sheikh Mohammed Shariful, Iwasaki, Masanori, Jackson, Rod T, Jacobs, Jeremy M, Jaddou, Hashem Y, Jafar, Tazeen, James, Kenneth, Jamil, Kazi M, Jamrozik, Konrad, Janszky, Imre, Janus, Edward, Jarani, Juel, Jarvelin, Marjo-Riitta, Jasienska, Grazyna, Jelakovic, Ana, Jelakovic, Bojan, Jennings, Garry, Jha, Anjani Kumar, Jiang, Chao Qiang, Jimenez, Ramon O, Jockel, Karl-Heinz, Joffres, Michel, Johansson, Mattias, Jokelainen, Jari J, Jonas, Jost B, Jorgensen, Torben, Joshi, Pradeep, Joukar, Farahnaz, Jovic, Dragana P, Jozwiak, Jacek J, Juolevi, Anne, Jurak, Gregor, Simina, Iulia Jurca, Juresa, Vesna, Kaaks, Rudolf, Kaducu, Felix O, Kafatos, Anthony, Kajantie, Eero O, Kalmatayeva, Zhanna, Kalter-Leibovici, Ofra, Kameli, Yves, Kanala, Kodanda R, Kannan, Srinivasan, Kapantais, Efthymios, Karki, Khem B, Katibeh, Marzieh, Katz, Joanne, Katzmarzyk, Peter T, Kauhanen, Jussi, Kaur, Prabhdeep, Kavousi, Maryam, Kazakbaeva, Gyulli M, Keil, Ulrich, Boker, Lital Keinan, Keinanen-Kiukaanniemi, Sirkka, Kelishadi, Roya, Kelleher, Cecily, Kemper, Han CG, Keramati, Maryam, Kerimkulova, Alina, Kersting, Mathilde, Key, Timothy, Khader, Yousef Saleh, Khalili, Davood, Khaw, Kay-Tee, Kheiri, Bahareh, Kheradmand, 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De Ridder K, de Rooij SR, De Smedt D, Deepa M, Deev AD, DeGennaro V, Jr, Dehghan A, Delisle H, Delpeuch F, Demarest S, Dennison E, Deren K, Deschamps V, Dhana K, Dhimal M, Di Castelnuovo AF, Dias-da-Costa JS, Díaz-Sánchez ME, Diaz A, Dika Z, Djalalinia S, Djordjic V, Do HT, Dobson AJ, Donati MB, Donfrancesco C, Donoso SP, Döring A, Dorobantu M, Dorosty AR, Doua K, Drygas W, Duan JL, Duante CA, Duboz P, Duda RB, Duleva V, Dulskiene V, Dumith SC, Dushpanova A, Dzerve V, Dziankowska-Zaborszczyk E, Eddie R, Eftekhar E, Egbagbe EE, Eggertsen R, Eghtesad S, Eiben G, Ekelund U, El-Khateeb M, El Ati J, Eldemire-Shearer D, Eliasen M, Elliott P, Engle-Stone R, Enguerran M, Erasmus RT, Erbel R, Erem C, Eriksen L, Eriksson JG, Escobedo-de la Peña J, Eslami S, Esmaeili A, Evans A, Faeh D, Fakhretdinova AA, Fall CH, Faramarzi E, Farjam M, Farrugia Sant'Angelo V, Farzadfar F, Fattahi MR, Fawwad A, Felix-Redondo FJ, Ferguson TS, Fernandes RA, Fernández-Bergés D, Ferrante D, Ferrao T, Ferrari M, Ferrario MM, Ferreccio C, Ferrer E, Ferrieres J, Figueiró TH, Fijalkowska A, Fink G, Fischer K, Föger B, Foo LH, Forsner M, Fouad HM, Francis DK, Franco MDC, Franco OH, Frikke-Schmidt R, Frontera G, Fuchs FD, Fuchs SC, Fujiati II, Fujita Y, Fumihiko M, Furusawa T, Gaciong Z, Gafencu M, Galbarczyk A, Galenkamp H, Galeone D, Galfo M, Galvano F, Gao J, Garcia-de-la-Hera M, García-Solano M, Gareta D, Garnett SP, Gaspoz J-M, Gasull M, Gaya ACA, Gaya AR, Gazzinelli A, Gehring U, Geiger H, Geleijnse JM, Ghanbari A, Ghasemi E, Gheorghe-Fronea O-F, Giampaoli S, Gianfagna F, Gill TK, Giovannelli J, Gironella G, Giwercman A, Gkiouras K, Godos J, Gogen S, Goldsmith RA, Goltzman D, Gómez SF, Gomula A, Goncalves Cordeiro da Silva B, Gonçalves H, Gonzalez-Chica DA, Gonzalez-Gross M, González-Leon M, González-Rivas JP, González-Villalpando C, González-Villalpando M-E, Gonzalez AR, Gottrand F, Graça AP, Graff-Iversen S, Grafnetter D, Grajda A, Grammatikopoulou MG, Gregor RD, Grodzicki T, Grøholt EK, 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Banach M., Bandosz P., Banegas J.R., Baran J., Barbagallo C.M., Barcelo A., Barkat A., Barros A.J., Barros M.V.G., Basit A., Bastos J.L.D., Bata I., Batieha A.M., Batista R.L., Battakova Z., Batyrbek A., Baur L.A., Beaglehole R., Bel-Serrat S., Belavendra A., Ben Romdhane H., Benedics J., Benet M., Berkinbayev S., Bernabe-Ortiz A., Bernotiene G., Bettiol H., Bezerra J., Bhagyalaxmi A., Bharadwaj S., Bhargava S.K., Bi H., Bi Y., Bia D., Bika Lele E.C., Bikbov M.M., Bista B., Bjelica D.J., Bjerregaard P., Bjertness E., Bjertness M.B., Bjorkelund C., Bloch K.V., Blokstra A., Bo S., Bobak M., Boddy L.M., Boehm B.O., Boeing H., Boggia J.G., Bogova E., Boissonnet C.P., Bojesen S.E., Bonaccio M., Bongard V., Bonilla-Vargas A., Bopp M., Borghs H., Bovet P., Braeckevelt L., Braeckman L., Bragt M.C., Brajkovich I., Branca F., Breckenkamp J., Breda J., Brenner H., Brewster L.M., Brian G.R., Brinduse L., Brophy S., Bruno G., Bueno-de-Mesquita H.B., Bugge A., Buoncristiano M., Burazeri G., Burns C., Cabrera de Leon A., Cacciottolo J., Cai H., Cama T., Cameron C., Camolas J., Can G., Candido A.P.C., Canete F., Capanzana M.V., Capkova N., Capuano E., Capuano V., Cardol M., Cardoso V.C., Carlsson A.C., Carmuega E., Carvalho J., Casajus J.A., Casanueva F.F., Celikcan E., Censi L., Cervantes-Loaiza M., Cesar J.A., Chamukuttan S., Chan A.W., Chan Q., Chaturvedi H.K., Chaturvedi N., Che Abdul Rahim N., Chen C.-J., Chen F., Chen H., Chen S., Chen Z., Cheng C.-Y., Cheraghian B., Chetrit A., Chikova-Iscener E., Chiolero A., Chiou S.-T., Chirlaque M.-D., Cho B., Christensen K., Christofaro D.G., Chudek J., Cifkova R., Cilia M., Cinteza E., Claessens F., Clarke J., Clays E., Cohen E., Concin H., Confortin S.C., Cooper C., Coppinger T.C., Corpeleijn E., Costanzo S., Cottel D., Cowell C., Craig C.L., Crampin A.C., Crujeiras A.B., Csilla S., Cucu A.M., Cui L., Cureau F.V., D'Arrigo G., d'Orsi E., Dacica L., Dal Re Saavedra M.A., Dallongeville J., Damasceno A., Damsgaard C.T., Dankner R., Dantoft T.M., Dasgupta P., Dastgiri S., Dauchet L., Davletov K., De Backer G., De Bacquer D., de Gaetano G., De Henauw S., de Oliveira P.D., De Ridder D., De Ridder K., de Rooij S.R., De Smedt D., Deepa M., Deev A.D., DeGennaro V., Dehghan A., Delisle H., Delpeuch F., Demarest S., Dennison E., Deren K., Deschamps V., Dhana K., Dhimal M., Di Castelnuovo A.F., Dias-da-Costa J.S., Diaz-Sanchez M.E., Diaz A., Dika Z., Djalalinia S., Djordjic V., Do H.T., Dobson A.J., Donati M.B., Donfrancesco C., Donoso S.P., Doring A., Dorobantu M., Dorosty A.R., Doua K., Drygas W., Duan J.L., Duante C.A., Duboz P., Duda R.B., Duleva V., Dulskiene V., Dumith S.C., Dushpanova A., Dzerve V., Dziankowska-Zaborszczyk E., Eddie R., Eftekhar E., Egbagbe E.E., Eggertsen R., Eghtesad S., Eiben G., Ekelund U., El-Khateeb M., El Ati J., Eldemire-Shearer D., Eliasen M., Elliott P., Engle-Stone R., Enguerran M., Erasmus R.T., Erbel R., Erem C., Eriksen L., Eriksson J.G., Escobedo-de la Pena J., Eslami S., Esmaeili A., Evans A., Faeh D., Fakhretdinova A.A., Fall C.H., Faramarzi E., Farjam M., Farrugia Sant'Angelo V., Farzadfar F., Fattahi M.R., Fawwad A., Felix-Redondo F.J., Ferguson T.S., Fernandes R.A., Fernandez-Berges D., Ferrante D., Ferrao T., Ferrari M., Ferrario M.M., Ferreccio C., Ferrer E., Ferrieres J., Figueiro T.H., Fijalkowska A., Fink G., Fischer K., Foger B., Foo L.H., Forsner M., Fouad H.M., Francis D.K., Franco M.D.C., Franco O.H., Frikke-Schmidt R., Frontera G., Fuchs F.D., Fuchs S.C., Fujiati I.I., Fujita Y., Fumihiko M., Furusawa T., Gaciong Z., Gafencu M., Galbarczyk A., Galenkamp H., Galeone D., Galfo M., Galvano F., Gao J., Garcia-de-la-Hera M., Garcia-Solano M., Gareta D., Garnett S.P., Gaspoz J.-M., Gasull M., Gaya A.C.A., Gaya A.R., Gazzinelli A., Gehring U., Geiger H., Geleijnse J.M., Ghanbari A., Ghasemi E., Gheorghe-Fronea O.-F., Giampaoli S., Gianfagna F., Gill T.K., Giovannelli J., Gironella G., Giwercman A., Gkiouras K., Godos J., Gogen S., Goldsmith R.A., Goltzman D., Gomez S.F., Gomula A., Goncalves Cordeiro da Silva B., Goncalves H., Gonzalez-Chica D.A., Gonzalez-Gross M., Gonzalez-Leon M., Gonzalez-Rivas J.P., Gonzalez-Villalpando C., Gonzalez-Villalpando M.-E., Gonzalez A.R., Gottrand F., Graca A.P., Graff-Iversen S., Grafnetter D., Grajda A., Grammatikopoulou M.G., Gregor R.D., Grodzicki T., Groholt E.K., Grontved A., Grosso G., Gruden G., Gu D., Gualdi-Russo E., Guallar-Castillon P., Gualtieri A., Gudmundsson E.F., Gudnason V., Guerrero R., Guessous I., Guimaraes A.L., Gulliford M.C., Gunnlaugsdottir J., Gunter M.J., Guo X.-H., Guo Y., Gupta P.C., Gupta R., Gureje O., Gurzkowska B., Gutierrez-Gonzalez E., Gutierrez L., Gutzwiller F., Ha S., Hadaegh F., Hadjigeorgiou C.A., Haghshenas R., Hakimi H., Halkjaer J., Hambleton I.R., Hamzeh B., Hange D., Hanif A.A., Hantunen S., Hari Kumar R., Hashemi-Shahri S.M., Hassapidou M., Hata J., Haugsgjerd T., Hayes A.J., He J., He Y., Heidinger-Felso R., Heinen M., Hejgaard T., Hendriks M.E., Henrique R.D.S., Henriques A., Hernandez Cadena L., Herrala S., Herrera V.M., Herter-Aeberli I., Heshmat R., Hill A.G., Ho S.Y., Ho S.C., Hobbs M., Hofman A., Holden Bergh I., Holdsworth M., Homayounfar R., Homs C., Hopman W.M., Horimoto A.R., Hormiga C.M., Horta B.L., Houti L., Howitt C., Htay T.T., Htet A.S., Htike M.M.T., Hu Y., Huerta J.M., Huhtaniemi I.T., Huidumac Petrescu C., Husseini A., Huu C.N., Huybrechts I., Hwalla N., Hyska J., Iacoviello L., Ibarluzea J.M., Ibrahim M.M., Ibrahim Wong N., Ikeda N., Ikram M.A., Iotova V., Irazola V.E., Ishida T., Islam M., Islam S.M.S., Iwasaki M., Jackson R.T., Jacobs J.M., Jaddou H.Y., Jafar T., James K., Jamil K.M., Jamrozik K., Janszky I., Janus E., Jarani J., Jarvelin M.-R., Jasienska G., Jelakovic A., Jelakovic B., Jennings G., Jha A.K., Jiang C.Q., Jimenez R.O., Jockel K.-H., Joffres M., Johansson M., Jokelainen J.J., Jonas J.B., Jorgensen T., Joshi P., Joukar F., Jovic D.P., Jozwiak J.J., Juolevi A., Jurak G., Jurca Simina I., Juresa V., Kaaks R., Kaducu F.O., Kafatos A., Kajantie E.O., Kalmatayeva Z., Kalter-Leibovici O., Kameli Y., Kanala K.R., Kannan S., Kapantais E., Karki K.B., Katibeh M., Katz J., Katzmarzyk P.T., Kauhanen J., Kaur P., Kavousi M., Kazakbaeva G.M., Keil U., Keinan Boker L., Keinanen-Kiukaanniemi S., Kelishadi R., Kelleher C., Kemper H.C., Keramati M., Kerimkulova A., Kersting M., Key T., Khader Y.S., Khalili D., Khaw K.-T., Kheiri B., Kheradmand M., Khosravi A., Khouw I.M., Kiechl-Kohlendorfer U., Kiechl S., Killewo J., Kim D.W., Kim H.C., Kim J., Kindblom J.M., Klakk H., Klimek M., Klimont J., Klumbiene J., Knoflach M., Koirala B., Kolle E., Kolsteren P., Konig J., Korpelainen R., Korrovits P., Korzycka M., Kos J., Koskinen S., Kouda K., Kovacs V.A., Kowlessur S., Koziel S., Kratzer W., Kriemler S., Kristensen P.L., Krokstad S., Kromhout D., Krtalic B., Kruger H.S., Kubinova R., Kuciene R., Kujala U.M., Kujundzic E., Kulaga Z., Kumar R.K., Kunesova M., Kurjata P., Kusuma Y.S., Kuulasmaa K., Kyobutungi C., La Q.N., Laamiri F.Z., Laatikainen T., Lachat C., Laid Y., Lam T.H., Lambrinou C.-P., Landais E., Lanska V., Lappas G., Larijani B., Latt T.S., Lauria L., Lazo-Porras M., Le Nguyen Bao K., Le Port A., Le T.D., Lee J., Lee P.H., Lehmann N., Lehtimaki T., Lemogoum D., Levitt N.S., Li Y., Liivak M., Lilly C.L., Lim W.-Y., Lima-Costa M.F., Lin H.-H., Lin X., Lin Y.-T., Lind L., Linneberg A., Lissner L., Litwin M., Liu J., Liu L., Lo W.-C., Loit H.-M., Long K.Q., Lopes L., Lopes O., Lopez-Garcia E., Lopez T., Lotufo P.A., Lozano J.E., Lukrafka J.L., Luksiene D., Lundqvist A., Lundqvist R., Lunet N., Lunogelo C., Lustigova M., Luszczki E., Ma G., Ma J., Ma X., Machado-Coelho G.L., Machado-Rodrigues A.M., Machi S., Macieira L.M., Madar A.A., Maggi S., Magliano D.J., Magnacca S., Magriplis E., Mahasampath G., Maire B., Majer M., Makdisse M., Maki P., Malekzadeh F., Malhotra R., Mallikharjuna Rao K., Malyutina S.K., Maniego L.V., Manios Y., Mann J.I., Mansour-Ghanaei F., Manzato E., Margozzini P., Markaki A., Markey O., Markidou Ioannidou E., Marques-Vidal P., Marques L.P., Marrugat J., Martin-Prevel Y., Martin R., Martorell R., Martos E., Marventano S., Mascarenhas L.P., Masoodi S.R., Mathiesen E.B., Mathur P., Matijasevich A., Matsha T.E., Mavrogianni C., Mazur A., Mbanya J.C.N., McFarlane S.R., McGarvey S.T., McKee M., McLachlan S., McLean R.M., McLean S.B., McNulty B.A., Mediene-Benchekor S., Medzioniene J., Mehdipour P., Mehlig K., Mehrparvar A.H., Meirhaeghe A., Meisfjord J., Meisinger C., Menezes A.M.B., Menon G.R., Mensink G.B., Menzano M.T., Mereke A., Meshram I.I., Metspalu A., Mi J., Michaelsen K.F., Michels N., Mikkel K., Milkowska K., Miller J.C., Minderico C.S., Mini G.K., Miquel J.F., Mirjalili M.R., Mirkopoulou D., Mirrakhimov E., Misigoj-Durakovic M., Mistretta A., Mocanu V., Modesti P.A., Moghaddam S.S., Mohajer B., Mohamed M.K., Mohamed S.F., Mohammad K., Mohammadi Z., Mohammadifard N., Mohammadpourhodki R., Mohan V., Mohanna S., Mohd Yusoff M.F., Mohebbi I., Mohebi F., Moitry M., Molbo D., Mollehave L.T., Moller N.C., Molnar D., Momenan A., Mondo C.K., Monroy-Valle M., Monterrubio-Flores E., Monyeki K.D.K., Moosazadeh M., Moreira L.B., Morejon A., Moreno L.A., Morgan K., Morin S.N., Mortensen E.L., Moschonis G., Mossakowska M., Mostafa A., Mota-Pinto A., Mota J., Motlagh M.E., Motta J., Moura-dos-Santos M.A., Mridha M.K., Msyamboza K.P., Mu T.T., Muc M., Mugosa B., Muiesan M.L., Mukhtorova P., Muller-Nurasyid M., Murphy N., Mursu J., Murtagh E.M., Musa K.I., Music Milanovic S., Musil V., Mustafa N., Nabipour I., Naderimagham S., Nagel G., Naidu B.M., Najafi F., Nakamura H., Namesna J., Nang E.E.K., Nangia V.B., Nankap M., Narake S., Nardone P., Nauck M., Neal W.A., Nejatizadeh A., Nelis K., Nelis L., Nenko I., Neovius M., Nervi F., Nguyen C.T., Nguyen D., Nguyen Q.N., Nieto-Martinez R.E., Nikitin Y.P., Ning G., Ninomiya T., Nishtar S., Noale M., Noboa O.A., Nogueira H., Norat T., Nordendahl M., Nordestgaard B.G., Noto D., Nowak-Szczepanska N., Nsour M.A., Nuhoglu I., Nurk E., O'Neill T.W., O'Reilly D., Obreja G., Ochimana C., Ochoa-Aviles A.M., Oda E., Oh K., Ohara K., Ohlsson C., Ohtsuka R., Olafsson O., Olinto M.T.A., Oliveira I.O., Omar M.A., Onat A., Ong S.K., Ono L.M., Ordunez P., Ornelas R., Ortiz A.P., Ortiz P.J., Osler M., Osmond C., Ostojic S.M., Ostovar A., Otero J.A., Overvad K., Owusu-Dabo E., Paccaud F.M., Padez C., Pagkalos I., Pahomova E., Paiva K.M.D., Pajak A., Palli D., Palloni A., Palmieri L., Pan W.-H., Panda-Jonas S., Pandey A., Panza F., Papandreou D., Park S.-W., Park S., Parnell W.R., Parsaeian M., Pascanu I.M., Pasquet P., Patel N.D., Pednekar M.S., Peer N., Peixoto S.V., Peltonen M., Pereira A.C., Peres M.A., Perez-Farinos N., Perez C.M., Peterkova V., Peters A., Petersmann A., Petkeviciene J., Petrauskiene A., Pettenuzzo E., Peykari N., Pham S.T., Pichardo R.N., Pierannunzio D., Pigeot I., Pikhart H., Pilav A., Pilotto L., Pistelli F., Pitakaka F., Piwonska A., Pizarro A.N., Plans-Rubio P., Poh B.K., Pohlabeln H., Pop R.M., Porta M., Posch G., Poudyal A., Poulimeneas D., Pouraram H., Pourfarzi F., Pourshams A., Poustchi H., Pradeepa R., Price A.J., Price J.F., Providencia R., Puder J.J., Pudule I., Puhakka S.E., Puiu M., Punab M., Qasrawi R.F., Qorbani M., Quoc Bao T., Radic I., Radisauskas R., Rahimikazerooni S., Rahman M., Raitakari O., Raj M., Rakhimova E., Rakhmatulloev S., Rakovac I., Ramachandra Rao S., Ramachandran A., Ramke J., Ramos E., Ramos R., Rampal L., Rampal S., Rarra V., Rascon-Pacheco R.A., Rasmussen M., Rech C.R., Redon J., Reganit P.F.M., Regecova V., Revilla L., Rezaianzadeh A., Ribas-Barba L., Ribeiro R., Riboli E., Richter A., Rigo F., Rinaldo N., Rinke de Wit T.F., Rito A., Ritti-Dias R.M., Rivera J.A., Robitaille C., Roccaldo R., Rodrigues D., Rodriguez-Artalejo F., Rodriguez-Perez M.D.C., Rodriguez-Villamizar L.A., Roggenbuck U., Rojas-Martinez R., Rojroongwasinkul N., Romaguera D., Romeo E.L., Rosario R.V., Rosengren A., Rouse I., Roy J.G., Rubinstein A., Ruhli F.J., Ruidavets J.-B., Ruiz-Betancourt B.S., Ruiz Moreno E., Rusakova I.A., Russell Jonsson K., Russo P., Rust P., Rutkowski M., Sabanayagam C., Sacchini E., Sachdev H.S., Sadjadi A., Safarpour A.R., Safi S., Safiri S., Saidi O., Saki N., Salanave B., Salazar Martinez E., Salmeron D., Salomaa V., Salonen J.T., Salvetti M., Samoutian M., Sanchez-Abanto J., Sandjaja, Sans S., Santa Marina L., Santos D.A., Santos I.S., Santos L.C., Santos M.P., Santos O., Santos R., Santos Sanz S., Saramies J.L., Sardinha L.B., Sarrafzadegan N., Sathish T., Saum K.-U., Savva S., Savy M., Sawada N., Sbaraini M., Scazufca M., Schaan B.D., Schaffrath Rosario A., Schargrodsky H., Schienkiewitz A., Schindler K., Schipf S., Schmidt C.O., Schmidt I.M., Schnohr P., Schottker B., Schramm S., Schroder H., Schultsz C., Schutte A.E., Sebert S., Sein A.A., Selamat R., Sember V., Sen A., Senbanjo I.O., Sepanlou S.G., Sequera V., Serra-Majem L., Servais J., Sevcikova L., Shalnova S.A., Shamah-Levy T., Shamshirgaran M., Shanthirani C.S., Sharafkhah M., Sharma S.K., Shaw J.E., Shayanrad A., Shayesteh A.A., Shengelia L., Shi Z., Shibuya K., Shimizu-Furusawa H., Shin D.W., Shin Y., Shirani M., Shiri R., Shrestha N., Si-Ramlee K., Siani A., Siantar R., Sibai A.M., Silva A.M., Silva D.A.S., Simon M., Simons J., Simons L.A., Sjoberg A., Sjostrom M., Skodje G., Slowikowska-Hilczer J., Slusarczyk P., Smeeth L., So H.-K., Soares F.C., Sobek G., Sobngwi E., Sodemann M., Soderberg S., Soekatri M.Y., Soemantri A., Sofat R., Solfrizzi V., Somi M.H., Sonestedt E., Song Y., Sorgjerd E.P., Sossa Jerome C., Soto-Rojas V.E., Soumare A., Sovic S., Sparboe-Nilsen B., Sparrenberger K., Spinelli A., Spiroski I., Staessen J.A., Stamm H., Stathopoulou M.G., Staub K., Stavreski B., Steene-Johannessen J., Stehle P., Stein A.D., Stergiou G.S., Stessman J., Stevanovic R., Stieber J., Stockl D., Stocks T., Stokwiszewski J., Stoyanova E., Stratton G., Stronks K., Strufaldi M.W., Sturua L., Suarez-Medina R., Suka M., Sun C.-A., Sundstrom J., Sung Y.-T., Sunyer J., Suriyawongpaisal P., Swinburn B.A., Sy R.G., Syddall H.E., Sylva R.C., Szklo M., Szponar L., Tai E.S., Tammesoo M.-L., Tamosiunas A., Tan E.J., Tang X., Tanser F., Tao Y., Tarawneh M.R., Tarp J., Tarqui-Mamani C.B., Taxova Braunerova R., Taylor A., Taylor J., Tchibindat F., Tebar W.R., Tell G.S., Tello T., Thankappan K.R., Theobald H., Theodoridis X., Thijs L., Thomas N., Thuesen B.H., Ticha L., Timmermans E.J., Tjonneland A., Tolonen H.K., Tolstrup J.S., Topbas M., Topor-Madry R., Torheim L.E., Tormo M.J., Tornaritis M.J., Torrent M., Torres-Collado L., Toselli S., Traissac P., Tran T.T.-H., Trichopoulos D., Trichopoulou A., Trinh O.T., Trivedi A., Tshepo L., Tsigga M., Tsugane S., Tuliakova A.M., Tulloch-Reid M.K., Tullu F., Tuomainen T.-P., Tuomilehto J., Turley M.L., Tynelius P., Tzotzas T., Tzourio C., Ueda P., Ugel E., Ukoli F.A., Ulmer H., Unal B., Usupova Z., Uusitalo H.M., Uysal N., Vaitkeviciute J., Valdivia G., Vale S., Valvi D., van Dam R.M., Van der Heyden J., van der Schouw Y.T., Van Herck K., Van Minh H., van Valkengoed I.G., Vanderschueren D., Vanuzzo D., Varbo A., Varela-Moreiras G., Varona-Perez P., Vasan S.K., Vega T., Veidebaum T., Velasquez-Melendez G., Velika B., Veronesi G., Verschuren W.M., Victora C.G., Viegi G., Viet L., Villalpando S., Vineis P., Vioque J., Virtanen J.K., Visser M., Visvikis-Siest S., Viswanathan B., Vladulescu M., Vlasoff T., Vocanec D., Volzke H., Voutilainen A., Voutilainen S., Vrijheid M., Vrijkotte T.G., Wade A.N., Wagner A., Waldhor T., Walton J., Wambiya E.O., Wan Bebakar W.M., Wan Mohamud W.N., Wanderley Junior R.D.S., Wang M.-D., Wang N., Wang Q., Wang X., Wang Y.X., Wang Y.-W., Wannamethee S.G., Wareham N., Weber A., Wedderkopp N., Weerasekera D., Weghuber D., Wei W., Weres A., Werner B., Whincup P.H., Widhalm K., Widyahening I.S., Wiecek A., Wilks R.J., Willeit J., Willeit P., Williams J., Wilsgaard T., Wojtyniak B., Wong-McClure R.A., Wong A., Wong J.E., Wong T.Y., Woo J., Woodward M., Wu F.C., Wu J., Wu L.J., Wu S., Xu H., Xu L., Yaacob N.A., Yamborisut U., Yan W., Yang L., Yang X., Yang Y., Yardim N., Yaseri M., Yasuharu T., Ye X., Yiallouros P.K., Yoosefi M., Yoshihara A., You Q.S., You S.-L., Younger-Coleman N.O., Yusof S.M., Yusoff A.F., Zaccagni L., Zafiropulos V., Zakavi S.R., Zamani F., Zambon S., Zampelas A., Zamrazilova H., Zapata M.E., Zargar A.H., Zaw K.K., Zdrojewski T., Zeljkovic Vrkic T., Zeng Y., Zhang L., Zhang Z.-Y., Zhao D., Zhao M.-H., Zhao W., Zhen S., Zheng W., Zheng Y., Zholdin B., Zhou M., Zhu D., Zocalo Y., Zuniga Cisneros J., Zuziak M., and Ezzati M.

Subjects
Male, body-mass index, ADULTHOOD, Adolescents, pituuskasvu, Pediatrics, Body Mass Index, 0302 clinical medicine, Child Development, nuoret, Public health surveillance, Medicine, Health Status Indicators, 10. No inequality, Child, 11 Medical and Health Sciences, Body mass index, ComputingMilieux_MISCELLANEOUS, education.field_of_study, VDP::Medisinske Fag: 700::Helsefag: 800::Samfunnsmedisin, sosialmedisin: 801, General Medicine, Body mass indexes, kansainvälinen vertailu, 3. Good health, Geography, Health, 030220 oncology & carcinogenesis, Child, Preschool, Medical and Health sciences, purl.org/becyt/ford/3 [https], medicine.medical_specialty, School-aged adolescents, Socio-culturale, lapset (ikäryhmät), Nursing, territories, ravinto, purl.org/becyt/ford/3.3 [https], 03 medical and health sciences, School Children, SDG 3 - Good Health and Well-being, SYSTEMATIC ANALYSIS, Humans, school-aged children and adolescents, Montenegro, education, Science & Technology, Omvårdnad, Health sciences, Medical and Health sciences, Ciências médicas e da saúde, Bayes Theorem, Anthropometry, Adolescent Development, medicine.disease, TRENDS, Height and Body-mass Index, Faculdade de Ciências Sociais, UNDERNUTRITION, Height index trajectories, Height, body mass index, children , epidemiology, risk factors, growth, Stature, Demography, Settore MED/09 - Medicina Interna, Internationality, [SDV]Life Sciences [q-bio], 030204 cardiovascular system & hematology, Body-mass index trajectories, Epidemiology, Medicine and Health Sciences, risk factors, countries, EPIDEMIOLOGY, height, children, adolescents, BMI, 030212 general & internal medicine, painoindeksi, Child development, 2. Zero hunger, Medicine(all), School age child, obestity children cardiovascular, Population Health, 1. No poverty, Pediatrik, Public Health, Global Health, Social Medicine and Epidemiology, 3142 Public health care science, environmental and occupational health, Pooled analysis, NUTRITION, Female, medicine.symptom, pooled analysis, Life Sciences & Biomedicine, terveys, height, BMI, nutrition, health, children, adolescents, Adolescent, growth, Population, body-mass, Population based, Body-mass index, Young Adult, Medicine, General & Internal, Meta-Analysis as Topic, General & Internal Medicine, parasitic diseases, Weight gain, School-aged childrens, Age trajectories, business.industry, Height, Weight, Body Height, Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi, Malnutrition, ONSET, Ciências da Saúde, Ciências médicas e da saúde, School-aged children, VDP::Medical disciplines: 700::Health sciences: 800::Community medicine, Social medicine: 801, business, terveysriskit, Estilos de Vida e Impacto na Saúde
Abstract

BACKGROUND: Comparable global data on health and nutrition of school-aged children and adolescents are scarce. We aimed to estimate age trajectories and time trends in mean height and mean body-mass index (BMI), which measures weight gain beyond what is expected from height gain, for school-aged children and adolescents., METHODS: For this pooled analysis, we used a database of cardiometabolic risk factors collated by the Non-Communicable Disease Risk Factor Collaboration. We applied a Bayesian hierarchical model to estimate trends from 1985 to 2019 in mean height and mean BMI in 1-year age groups for ages 5–19 years. The model allowed for non-linear changes over time in mean height and mean BMI and for non-linear changes with age of children and adolescents, including periods of rapid growth during adolescence., FINDINGS: We pooled data from 2181 population-based studies, with measurements of height and weight in 65 million participants in 200 countries and territories. In 2019, we estimated a difference of 20 cm or higher in mean height of 19-year-old adolescents between countries with the tallest populations (the Netherlands, Montenegro, Estonia, and Bosnia and Herzegovina for boys; and the Netherlands, Montenegro, Denmark, and Iceland for girls) and those with the shortest populations (Timor-Leste, Laos, Solomon Islands, and Papua New Guinea for boys; and Guatemala, Bangladesh, Nepal, and Timor-Leste for girls). In the same year, the difference between the highest mean BMI (in Pacific island countries, Kuwait, Bahrain, The Bahamas, Chile, the USA, and New Zealand for both boys and girls and in South Africa for girls) and lowest mean BMI (in India, Bangladesh, Timor-Leste, Ethiopia, and Chad for boys and girls; and in Japan and Romania for girls) was approximately 9–10 kg/m2. In some countries, children aged 5 years started with healthier height or BMI than the global median and, in some cases, as healthy as the best performing countries, but they became progressively less healthy compared with their comparators as they grew older by not growing as tall (eg, boys in Austria and Barbados, and girls in Belgium and Puerto Rico) or gaining too much weight for their height (eg, girls and boys in Kuwait, Bahrain, Fiji, Jamaica, and Mexico; and girls in South Africa and New Zealand). In other countries, growing children overtook the height of their comparators (eg, Latvia, Czech Republic, Morocco, and Iran) or curbed their weight gain (eg, Italy, France, and Croatia) in late childhood and adolescence. When changes in both height and BMI were considered, girls in South Korea, Vietnam, Saudi Arabia, Turkey, and some central Asian countries (eg, Armenia and Azerbaijan), and boys in central and western Europe (eg, Portugal, Denmark, Poland, and Montenegro) had the healthiest changes in anthropometric status over the past 3·5 decades because, compared with children and adolescents in other countries, they had a much larger gain in height than they did in BMI. The unhealthiest changes—gaining too little height, too much weight for their height compared with children in other countries, or both—occurred in many countries in sub-Saharan Africa, New Zealand, and the USA for boys and girls; in Malaysia and some Pacific island nations for boys; and in Mexico for girls., INTERPRETATION: The height and BMI trajectories over age and time of school-aged children and adolescents are highly variable across countries, which indicates heterogeneous nutritional quality and lifelong health advantages and risks., Wellcome Trust, AstraZeneca Young Health Programme, EU., peer-reviewed

Published
2020
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29. Design and testing of a compact PEM electrolyzer system.

Author

Briguglio, N., Brunaccini, G., Siracusano, S., Randazzo, N., Dispenza, G., Ferraro, M., Ornelas, R., Aricò, A.S., and Antonucci, V.

Subjects
*HYDROGEN production, *PROTON exchange membrane fuel cells, *MOLECULAR self-assembly, *PROTOTYPES, *ELECTROLYTIC cells, *TEMPERATURE effect, *HYDRAULIC circuits, *COMPUTATIONAL fluid dynamics
Abstract

A compact prototype system for H2 production based on a Polymer Electrolyte Membrane (PEM) stack was developed and investigated. A detailed study and an optimization of the Balance of Plant (BoP) was carried out. The system was developed in laboratory by using commercial devices tailored around in house-made membrane electrode assemblies (MEAs). The study regarded both the hydraulic circuit efficiency loss and its optimization by varying process parameters. Energy consumption for auxiliary devices was studied at different temperatures (40, 60 and 75 °C). Efficiency and control strategy management of the system were investigated. Despite an increase of stack performance observed at high temperature, maximum system efficiency (65% compared to HHV) was obtained at 40 °C because of moderate energy consumption by the electric heater. To evaluate the stack contribution to the overall efficiency, the present investigation was completed by a hydrodynamic study of the stack inside the system. Diffusional aspects related to the water mass distribution inside the stack were investigated through a computational fluid dynamic analysis (CFD). In particular, a 3D analysis of the whole stack composed by 120 channels and 10 cells was carried out. The model showed a quite uniform distribution of water over the individual channels and a homogeneous pressure inside the cells. Accordingly, the risk of having hot spots and gases accumulated inside the stack was minimal. [ABSTRACT FROM AUTHOR]

Published
2013
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30. A hybrid power plant (Solar–Wind–Hydrogen) model based in artificial intelligence for a remote-housing application in Mexico

Author

Chávez-Ramírez, A.U., Vallejo-Becerra, V., Cruz, J.C., Ornelas, R., Orozco, G., Muñoz-Guerrero, R., and Arriaga, L.G.

Subjects
*HYBRID systems, *FOSSIL fuel power plants, *ARTIFICIAL intelligence, *HYDROGEN production, *SYSTEMS design, *ENERGY conversion, *PHOTOVOLTAIC power systems
Abstract

Abstract: World fossil fuel reserve is expected to be exhausted in coming few decades. Therefore, the decentralization of energy production requires the design and integration of different energy sources and conversion technologies to meet the power demand for single remote housing applications in a sustainable way under various weather conditions. This work focuses on the integration of photovoltaic (PV) system, micro-wind turbine (WT), Polymeric Exchange Membrane Fuel Cell (PEM-FC) stack and PEM water electrolyzer (PEM-WE), for a sustained power generation system (2.5 kW). The main contribution of this work is the hybridization of alternate energy sources with the hydrogen conversion systems using mid-term and short-term storage models based in artificial intelligence techniques built from experimental data (measurements obtained from the site of interest), this models allow to obtain better accuracy in performance prediction (PVMSE = 8.4%, PEM-FCMSE = 2.4%, PEM-WEMSE = 1.96%, GSRMSE = 7.9%, WTMSE = 14%) with a practical design and dynamic under intelligent control strategies to build an autonomous system. [Copyright &y& Elsevier]

Published
2013
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31. Synthesis and evaluation of ATO as a support for Pt–IrO2 in a unitized regenerative fuel cell

Author

Cruz, J.C., Rivas, S., Beltran, D., Meas, Y., Ornelas, R., Osorio-Monreal, G., Ortiz-Frade, L., Ledesma-García, J., and Arriaga, L.G.

Subjects
*IRIDIUM catalysts, *PROTON exchange membrane fuel cells, *TIN oxides, *PLATINUM catalysts, *ANTIMONY, *HEAT treatment of metals, *OXIDATION-reduction reaction, *X-ray diffraction
Abstract

Abstract: An IrO2 catalyst was prepared using a colloidal method followed by a thermal treatment. The catalyst was later mixed with Pt-Black and supported on the Sb-doped SnO2 (ATO), synthesized through the same colloidal method. ATO was investigated as a possible catalyst support in an electrode of a regenerative fuel cell (URFC), where Pt–IrO2 was used as the catalyst for the oxygen evolution and reduction reactions. The morphology and composition of the ATO support was investigated through transmission electron microscopy, X-ray diffraction (including Rietveld Refinement), BET analysis, and X-ray fluorescence. An ATO support was obtained with a highly homogeneous distribution and crystal sizes, measuring approximately 4–6 nm. The Pt–IrO2/ATO material was deposited on a Nafion 115 membrane with 0.5 mg cm−2 of catalyst loading. Pt/Vulcan XC-72 (30 wt. %, E-TEK) was used as the catalyst in the H2 compartment with a Pt loading of 0.4 mg cm−2. The electrochemical activity of the Pt–IrO2/ATO for oxygen evolution/reduction in the URFC system was investigated by AC-impedance spectroscopy, linear voltammetry, and chronoamperometry techniques. The maximum mass current activity was 1118 A g−1 at 1.8 V in proton-exchange membrane water electrolyser mode (PEMWE) and 565 A g−1 at 0.3 V in proton-exchange membrane fuel cell mode (PEMFC), both at 80 °C. The value of the round-trip energy efficiency was approximately 48% at 50 A g−1. [Copyright &y& Elsevier]

Published
2012
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32. Nanosized Pt/IrO2 electrocatalyst prepared by modified polyol method for application as dual function oxygen electrode in unitized regenerative fuel cells

Author

Cruz, J.C., Baglio, V., Siracusano, S., Ornelas, R., Arriaga, L.G., Antonucci, V., and Aricò, A.S.

Subjects
*ELECTROCATALYSIS, *METAL nanoparticles, *PLATINUM catalysts, *METALLIC oxides, *IRIDIUM compounds, *POLYOLS, *ELECTRODES, *FUEL cells, *ENERGY conversion
Abstract

Abstract: A new generation of highly efficient and non-polluting energy conversion and storage systems is vital to meeting the challenges of global warming and the finite reality of fossil fuels. In this work, nanosized Pt/IrO2 electrocatalysts are synthesized and investigated for the oxygen evolution and reduction reactions in unitized regenerative fuel cells (URFCs). The catalysts are prepared by decorating Pt nanoparticles (2–10 nm) onto the surface of a nanophase IrO2 (7 nm) support using an ultrasonic polyol method. The synthesis procedure allows deposition of metallic Pt nanoparticles on Ir-oxide without causing any occurrence of metallic Ir. The latter is significantly less active for oxygen evolution than the corresponding oxide. This process represents an important progress with respect to the state of the art in this field being the oxygen electrocatalyst generally obtained by mechanical mixing of Pt and IrO2. The nanosized Pt/IrO2 (50:50 wt.%) is sprayed onto a Nafion 115 membrane and used as dual function oxygen electrode, whereas 30 wt.% Pt/C is used as dual function hydrogen electrode in the URFC. Electrochemical activity of the membrane-electrode assembly (MEA) is investigated in a single cell at room temperature and atmospheric pressure both under electrolysis and fuel cell mode to assess the perspectives of the URFC to operate as energy storage device in conjunction with renewable power sources. [Copyright &y& Elsevier]

Published
2012
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33. An electrochemical study of a PEM stack for water electrolysis

Author

Siracusano, S., Baglio, V., Briguglio, N., Brunaccini, G., Di Blasi, A., Stassi, A., Ornelas, R., Trifoni, E., Antonucci, V., and Aricò, A.S.

Subjects
*ELECTROCHEMISTRY, *PROTON exchange membrane fuel cells, *WATER electrolysis, *ELECTROLYTIC cells, *TEMPERATURE effect, *ELECTRIC power, *ENERGY consumption, *HYDROGEN
Abstract

Abstract: The electrochemical properties of a proton exchange membrane (PEM) stack electrolyzer (9 cells of 100 cm2 geometrical area) were investigated at different temperatures. An amount of H2 of ∼270 l h−1 was produced at 60 A (600 mA cm−2) and 70 °C under 876 W of applied electrical power. The corresponding specific energy consumed in the process was 3.24 Wh·l−1H2. The Faradic and electrical efficiencies were determined. Overall stack efficiencies of 73% and 85%, at 60 A and 70 °C, with respect to the low and high heating value of hydrogen, respectively, were obtained. These results confirmed the successful scale-up of a previous lab-scale device. [Copyright &y& Elsevier]

Published
2012
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34. Influence of silica morphology in composite Nafion membranes properties

Author

Alvarez, A., Guzmán, C., Carbone, A., Saccà, A., Gatto, I., Passalacqua, E., Nava, R., Ornelas, R., Ledesma-García, J., and Arriaga, L.G.

Subjects
*SILICA, *ARTIFICIAL membranes, *INORGANIC compounds, *TEMPERATURE, *MATRICES (Mathematics), *MEASUREMENT, *FOUNDING, *POWDERS
Abstract

Abstract: The introduction of inorganic compounds into the Nafion polymeric matrix represents a possible solution to increase the operative temperature (T > 100 °C) without losing the conductivity, water transport properties and above all improving the mechanical characteristics. Two silica materials with different morphologies were synthesized via sol–gel method (SiO2 and SBA-16) by a tetraethyl orthosilicate (TEOS, 98%, Aldrich). Composite Nafion membranes were prepared using a 3%wt/wt of each powder and a standardized casting method. The influence of morphology on chemical–physical properties of membranes was investigated. It was highlighted that the silica introduction reduces the swelling parameters compared to bare Nafion membrane (NRecast) at room temperature. A similar behaviour was observed also in the proton conductivity measurements, in fact values of 0.144 S/cm, 0.114 S/cm and 0.078 S/cm were recorded at 80 °C for NRecast, NSBA-16 and NSiO2 respectively. Polarisation curves carried out at 100 °C have revealed a better performance for composite membranes (NSBA-16) than NRecast with a similar trend of proton conductivity. [Copyright &y& Elsevier]

Published
2011
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35. Investigation of IrO2 electrocatalysts prepared by a sulfite-couplex route for the O2 evolution reaction in solid polymer electrolyte water electrolyzers

Author

Siracusano, S., Baglio, V., Stassi, A., Ornelas, R., Antonucci, V., and Aricò, A.S.

Subjects
*ELECTROCATALYSIS, *POLYELECTROLYTES, *WATER electrolysis, *ELECTROCHEMICAL analysis, *CHEMICAL reactions, *COMPLEX compounds, *X-ray diffraction, *X-ray photoelectron spectroscopy
Abstract

Abstract: IrO2 electrocatalysts were prepared and electrochemically characterized for the oxygen evolution reaction in a Solid Polymer Electrolyte (SPE) electrolyzer. By using a sulfite complex-based preparation procedure, an amorphous iridium oxide precursor was obtained at 80 °C, which was, successively, calcined at different temperatures: 350 °C, 400 °C and 450 °C. A physico-chemical characterization was carried out by X Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and X-ray-photoelectron spectroscopy (XPS). The various IrO2 catalysts were sprayed onto a Nafion 115 membrane with a loading of 2.5 mg cm−2 to form the anode. A Pt/C catalyst (Pt loading 0.5 mg cm−2) was used as cathode. The best electrochemical performance was obtained for the cell based on the IrO2 calcined at 350 °C. The maximum current density at high potentials (1.8  V) was about 1.75 A cm−2. Accelerated time-tests at 2 A cm−2 demonstrated a suitable stability of the IrO2 calcined at 350 °C; however, the intrinsic stability appeared to increase with the calcination temperature. The sample calcined at 400 °C could represent a good compromise between performance and intrinsic stability. [Copyright &y& Elsevier]

Published
2011
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36. Composite membranes based on micro and mesostructured silica: A comparison of physicochemical and transport properties

Author

Alvarez, A., Guzmán, C., Carbone, A., Saccà, A., Gatto, I., Pedicini, R., Passalacqua, E., Nava, R., Ornelas, R., Ledesma-García, J., and Arriaga, L.G.

Subjects
*ARTIFICIAL membranes, *COMPOSITE materials, *SILICA, *MESOPOROUS materials, *INORGANIC compounds, *COPOLYMERS, *MATERIALS science
Abstract

Abstract: The aim of this work is to incorporate inorganic compounds into the Nafion matrix (composite membranes) for high temperature of a polymer electrolyte fuel cell (T cell >100°C). Three silicon oxides having a different morphology were synthesized starting with a tetraethyl orthosilicate as a precursor via sol–gel method: SBA15, SBA15-SH and SiO2. Successively, composite Nafion membranes were prepared using a 3% (w/w) of each powder through a standardized casting method. The influence of SiO2 morphology on chemical–physical properties of the membranes was highlighted resulting in a reduction of the swelling parameters of the composite membranes if compared at T ≥80°C to a recast bare Nafion membrane, used as a reference. Good proton conductivity was also observed for all composite membranes with values of 0.144Scm−1, 0.136Scm−1, 0.090Scm−1and 0.078Scm−1 recorded at 80°C (100% RH) for Nrecast, NSBA15, NSBA15-SH and NSiO2, respectively. The polarisation curves carried out at 120°C (75% RH, 1.5abs.bar) have revealed a higher stability for NSBA15 membrane after a short time-test, probably because the silica morphology is able to retain water within the polymer matrix and, in accordance to the swelling data. [Copyright &y& Elsevier]

Published
2011
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37. Optimization of components and assembling in a PEM electrolyzer stack

Author

Siracusano, S., Di Blasi, A., Baglio, V., Brunaccini, G., Briguglio, N., Stassi, A., Ornelas, R., Trifoni, E., Antonucci, V., and Aricò, A.S.

Subjects
*PROTON exchange membrane fuel cells, *PROCESS optimization, *ELECTROLYTIC cells, *ELECTROCHEMISTRY, *IMPEDANCE spectroscopy, *POTENTIOMETRY, *ELECTRODES, *HYDROGEN production, *CATALYSTS
Abstract

Abstract: An optimization study of components and assembling characteristics for a proton exchange membrane (PEM) short stack electrolyzer (3 cells of 100 cm2 geometrical area) was carried out. The electrochemical properties were investigated by polarization, impedance spectroscopy and chrono-potentiometric measurements. A decrease of the ohmic contact resistance between the bipolar plates and the electrode backing layer was obtained by using an appropriate thickness for the gas diffusion layers/current collectors as well as by an optimization of stack compression. The amount of H2 produced was ∼90 l h−1 at 60 A (600 mA cm−2) and 75 °C under 300 W of applied electrical power. No significant leakage or gas recombination was observed. The stack electrical efficiency was 75% and 88%, at 60 A and 75 °C, with respect to the low and high heating value of hydrogen, respectively. [Copyright &y& Elsevier]

Published
2011
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38. Electrochemical characterization of single cell and short stack PEM electrolyzers based on a nanosized IrO2 anode electrocatalyst

Author

Siracusano, S., Baglio, V., Di Blasi, A., Briguglio, N., Stassi, A., Ornelas, R., Trifoni, E., Antonucci, V., and Aricò, A.S.

Subjects
*ELECTROLYTIC cells, *ELECTROCATALYSIS, *IRIDIUM catalysts, *ANODES, *HYDROGEN production, *NANOSTRUCTURED materials, *PROTON exchange membrane fuel cells, *TRANSMISSION electron microscopy, *TEMPERATURE effect
Abstract

Abstract: A nanosized IrO2 anode electrocatalyst was prepared by a sulfite-complex route for application in a proton exchange membrane (PEM) water electrolyzer. The physico-chemical properties of the IrO2 catalyst were studied by termogravimetry–differential scanning calorimetry (TG–DSC), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The electrochemical activity of this catalyst for oxygen evolution was investigated in a single cell PEM electrolyzer consisting of a Pt/C cathode and a Nafion® membrane. A current density of 1.26Acm−2 was obtained at 1.8V and a stable behavior during steady-state operation at 80°C was recorded. The Tafel plots for the overall electrochemical process indicated a slope of about 80mVdec−1 in a temperature range from 25°C to 80°C. The kinetic and ohmic activation energies for the electrochemical process were 70.46kJmol−1 and 13.45kJmol−1, respectively. A short stack (3 cells of 100cm2 geometrical area) PEM electrolyzer was investigated by linear voltammetry, impedance spectroscopy and chrono-amperometric measurements. The amount of H2 produced was 80lh−1 at 60A under 330W of applied electrical power. The stack electrical efficiency at 60A and 75°C was 70% and 81% with respect to the low and high heating value of hydrogen, respectively. [Copyright &y& Elsevier]

Published
2010
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39. Performance and degradation of high temperature polymer electrolyte fuel cell catalysts

Author

Aricò, A.S., Stassi, A., Modica, E., Ornelas, R., Gatto, I., Passalacqua, E., and Antonucci, V.

Subjects
*HIGH temperatures, *SULFURIC acid, *ELECTROLYTES, *PLATINUM
Abstract

Abstract: An investigation of carbon-supported Pt/C and PtCo/C catalysts was carried out with the aim to evaluate their stability under high temperature polymer electrolyte membrane fuel cell (PEMFC) operation. Carbon-supported nanosized Pt and PtCo particles with a mean particle size between 1.5nm and 3nm were prepared by using a colloidal route. A suitable degree of alloying was obtained for the PtCo catalyst by using a carbothermal reduction. The catalyst stability was investigated to understand the influence of carbon black corrosion, platinum dissolution and sintering in gas-fed sulphuric acid electrolyte half-cell at 75°C and in PEMFC at 130°C. Electrochemical active surface area and catalyst performance were determined in PEMFC at 80°C and 130°C. A maximum power density of about 700mWcm−2 at 130°C and 3bar abs. O2 pressure with 0.3mgPtcm−2 loading was achieved. The PtCo alloy showed a better stability than Pt in sulphuric acid after cycling; yet, the PtCo/C catalyst showed a degradation after the carbon corrosion test. The PtCo/C catalyst showed smaller sintering effects than Pt/C after accelerated degradation tests in PEMFC at 130°C. [Copyright &y& Elsevier]

Published
2008
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40. Nafion–TiO2 hybrid membranes for medium temperature polymer electrolyte fuel cells (PEFCs)

Author

Saccà, A., Carbone, A., Passalacqua, E., D’Epifanio, A., Licoccia, S., Traversa, E., Sala, E., Traini, F., and Ornelas, R.

Subjects
*DIRECT energy conversion, *ELECTRIC batteries, *FUEL cells, *ELECTROCHEMISTRY
Abstract

Abstract: A nanocomposite re-cast Nafion hybrid membrane containing titanium oxide calcined at T =400°C as an inorganic filler was developed in order to work at medium temperature in polymer electrolyte fuel cells (PEFCs) maintaining a suitable membrane hydration under fuel cell operative critical conditions. Nanometre TiO2 powder was synthesized via a sol–gel procedure by a rapid hydrolysis of Ti(OiPr)4. The membrane was prepared by mixing a Nafion–dimethylacetammide (DMAc) dispersion with a 3wt% of TiO2 powder and casting the mixture by Doctor Blade technique. The resulting film was characterised in terms of water uptake and ion exchange capacity (IEC). The membrane was tested in a single cell from 80 to 130°C in humidified H2/air. The obtained results were compared with the commercial Nafion115 and a home-made recast Nafion membrane. Power density values of 0.514 and 0.256Wcm−2 at 0.56V were obtained at 110 and 130°C, respectively, for the composite Nafion–Titania membrane. Preliminary tests carried out using steam reforming (SR) synthetic fuel at about 110°C have highlighted the benefit of the inorganic filler introduction when PEFC operates at medium temperature and with processed hydrogen. [Copyright &y& Elsevier]

Published
2005
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