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Your search keyword '"Velázquez, Jesús"' showing total 97 results
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97 results on '"Velázquez, Jesús"'

1. Key Experimental Considerations When Evaluating Functional Ionic Liquids for Combined Capture and Electrochemical Conversion of CO2

Author

Dongare, Saudagar, Coskun, Oguz Kagan, Cagli, Eda, Stanley, Jared S, Mir, Qayoom, Brower, Rowan S, Velázquez, Jesús M, Yang, Jenny Y, Sacci, Robert L, and Gurkan, Burcu

Subjects
Engineering, Materials Engineering, Chemical Sciences, Physical Chemistry, Climate Action, Chemical Physics
Abstract

Ionic liquids (ILs) are considered functional electrolytes for the electrocatalytic reduction of CO2 (ECO2R) due to their role in the double-layer structure formation and increased CO2 availability at the electrode surface, which reduces the voltage requirement. However, not all ILs are the same, considering the purity and degree of the functionality of the IL. Further, there are critical experimental factors that impact the evaluation of ILs for ECO2R including the reference electrode, working electrode construction, cosolvent selection, cell geometry, and whether the electrochemical cell is a single compartment or a divided cell. Here, we describe improved synthesis methods of imidazolium cyanopyrrolide IL for electrochemical studies in consideration of precursor composition and reaction time. We explored how IL with cosolvents (i.e. acetonitrile, dimethylformamide, dimethyl sulfoxide, propylene carbonate, and n-methyl-2-pyrrolidone) affects conductivity, CO2 mass transport, and ECO2R activation overpotential together with the effects of electrode materials (Sn, Ag, Au, and glassy carbon). Acetonitrile was found to be the best solvent for lowering the onset potential and increasing the catalytic current density for the production of CO owing to the enhanced ion mobility in combination with the silver electrode. Further, the ECO2R activity of molecular catalysts Ni(cyclam)Cl2 and iron tetraphenylsulfonato porphyrin (FeTPPS) on the carbon cloth electrode maintained high Faradaic efficiencies for CO in the presence of the IL. This study presents best practices for examining nontraditional multifunctional electrolytes amenable to integrated CO2 capture and conversion technologies for homogeneous and heterogeneous ECO2R.

Published
2024

3. X-ray absorption spectroscopy insights on the structure anisotropy and charge transfer in Chevrel Phase chalcogenides

Author

Hyler, Forrest P, Wuille Bille, Brian A, Ortíz-Rodríguez, Jessica C, Sanz-Matias, Ana, Roychoudhury, Subhayan, Perryman, Joseph T, Patridge, Christopher J, Singstock, Nicholas R, Musgrave, Charles B, Prendergast, David, and Velázquez, Jesús M

Subjects
Chemical Physics
Abstract

The electronic structure and local coordination of binary (Mo6T8) and ternary Chevrel Phases (MxMo6T8) are investigated for a range of metal intercalant and chalcogen compositions. We evaluate differences in the Mo L3-edge and K-edge X-ray absorption near edge structure across the suite of chalcogenides MxMo6T8 (M = Cu, Ni, x = 1-2, T = S, Se, Te), quantifying the effect of compositional and structural modification on electronic structure. Furthermore, we highlight the expansion, contraction, and anisotropy of Mo6 clusters within these Chevrel Phase frameworks through extended X-ray absorption fine structure analysis. Our results show that metal-to-cluster charge transfer upon intercalation is dominated by the chalcogen acceptors, evidenced by significant changes in their respective X-ray absorption spectra in comparison to relatively unaffected Mo cations. These results explain the effects of metal intercalation on the electronic and local structure of Chevrel Phases across various chalcogen compositions, and aid in rationalizing electron distribution within the structure.

Published
2022

4. Adsorption of perfluorooctanoic acid from water by pH-modulated Brönsted acid and base sites in mesoporous hafnium oxide ceramics

Author

Hussain, Fatima A, Janisse, Samuel E, Heffern, Marie C, Kinyua, Maureen, and Velázquez, Jesús M

Subjects
Environmental Sciences, Pollution and Contamination, Chemical Engineering, Environmental Chemistry, Materials Chemistry, Materials Science
Abstract

Per- and polyfluoroalkyl substances (PFAS) are increasingly appearing in drinking water sources globally. Our work focuses specifically on the adsorption of the legacy perfluorooctanoic acid (PFOA) using mesoporous hafnium oxide (MHO) ceramic synthesized via a sol-gel process. Experiments were performed at varying pH to determine the effect of surface charge on adsorption capacity of PFOA by MHO, and to postulate adsorption behavior. At pH 2.3, the adsorption capacity of PFOA on MHO was 20.9 mg/g, whereas at a higher pH of 6.3, it was much lower at 9.2 mg/g. This was due to increased coulombic attractions at lower pH between the positively charged conjugate acid active sites on MHO surface and negatively charged deprotonated PFOA anion in solution. After adsorption, the solid MHO was regenerated via calcination, reducing the amount of toxic solid waste to be disposed since the adsorbent is regenerated, and the PFOA is completely removed.

Published
2022

6. Promoting Inclusive and Culturally Responsive Teaching Using Co-Classes for General Chemistry

Author

Ortiz-Rodríguez, Jessica C., Brinkman, Hannah, Nglankong, Lea, Enderle, Bryan, and Velázquez, Jesús M.

Abstract

The shift to remote teaching induced by the COVID-19 pandemic has increased pre-existing academic disparities in the student community, augmenting the disadvantages for students who already experience opportunity gaps. This work describes the implementation of an online chemistry co-class focused on providing educational and social support to first-generation, low-income underrepresented students enrolled in a General Chemistry course at the University of California Davis. The co-class offered concurrently with the General Chemistry course aimed to address the academic disparities induced by remote learning and the loss of classroom community during isolation. Students in the co-class were prepared academically in a smaller setup than their General Chemistry course (10-20 vs 500-600 students), which facilitated their engagement and participation in academic and community-building activities. Results from Fall 2020-Spring 2021 quarters show that students who participated in the CHE 98 co-class obtained higher grades in general, where 61% of the students received a C+ or higher in the General Chemistry course, compared to only 47% for the comparison group. Students also identified having a network of support as one of the class's strengths and had an interest in taking a similar course again. Our results highlight that providing an educational environment that is inclusive, culturally responsive, and supportive could promote equity among the student community and have a positive influence on underrepresented student retention in STEM. Therefore, the strategies discussed herein could be applied to develop analogous courses in remote and in-person teaching environments.

Published
2022
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7. Reversible Room-Temperature Fluoride-Ion Insertion in a Tunnel-Structured Transition Metal Oxide Host

Author

Zaheer, Wasif, Andrews, Justin L, Parija, Abhishek, Hyler, Forrest P, Jaye, Cherno, Weiland, Conan, Yu, Young-Sang, Shapiro, David A, Fischer, Daniel A, Guo, Jinghua, Velázquez, Jesús M, and Banerjee, Sarbajit

Subjects
Engineering, Materials Engineering, Chemical Sciences, Physical Chemistry, Chemical sciences
Abstract

An energy storage paradigm orthogonal to Li-ion battery chemistries can be conceptualized by employing anions as the primary charge carriers. F-ion conversion chemistries show promise but have limited cyclability as a result of the significant change in volume of active electrodes upon metal-metal fluoride interconversion. In contrast, the exploration of insertion chemistries has been stymied by the lack of hosts amenable to reversible F-ion insertion at room temperature. Here we show the reversible and homogeneous topochemical insertion/deinsertion and bulk diffusion of F ions within the one-dimensional tunnels of submicrometer-sized FeSb2O4 particles at room temperature. The insertion of F ions is evidenced by formal oxidation of the iron centers from Fe2+ to Fe3+ with a lattice volume contraction of

Published
2020

14. Compliance with the clinical guidelines for managing asthma by primary care physicians: An ambispective observational study

Author

Abedianzadeh Timar, Mohsen, Acha Domínguez, Jesús, Aguaviva Bascuñana, Jesus, Aguilar Martín, Ignacio, Ales Conejo, Francisco Ignacio, Alfaro González, Juan Vicente, Alfonso Landa, Patricia, Altés Boronat, Andrés, Álvarez Arriero, Jesús Joaquín, Álvarez Rojo, Juan Ángel, Vidal German, Allut, Amaro Cendón, Jesús, Amiano Arregui, María Teresa, Angulo Vallejo, Esther, Anton Álvarez, Juan José, Anton Ortega, Javier, Arconada Perez, Ana, Ardiaca Burgués, Lidia, Armario Vázquez, Juan Manuel, Arroyo Cubeiro, Amador, Aso Mendialdea, Koldo, Attardo, Francesca, Ávila de Tomás, José Francisco, Avinent Arnal, M. Jesús, Aznar Aguilar, Francisco, Aznar Tejero, Pilar, Baena Montilla, Emilio, Baeza López, José María, Barón Carrillo, Juan José, Bartolomé Resano, Rafael, Becoña de la Torre, Francisco, Benavent Martín, Isabel, Benedí Sánchez, María Teresa, Berrocal del Brío, José, Blanco Delgado, Antonio, Bleda Cano, Jesús, Boladeras Sabater, Josep, Bolívar Mantilla, Zenaida, Brito Brito, Elisenda, Burgos Parra, M. Rosario, Buxadé Martí, Isaac, Caballero Garcia, Juan Carlos, Cabañas Enríquez, Luis Fernando, Calviño Cerqueiro, Marcelino, Calvo Fernández, Juan, Calle Velles, Felipe, Camaro Zafra, Beatriz, Campomar Quetlas, Jaume, Capitán Jurado, Mónica, Cárdenas Joyanes, Dolores, Carles Bueso, Gonzalo, Carvajal Puente, Cristina, Casado Rodriguez, Cristina, Casanova García, Carlos, Castellà Cahiz, Santiago, Castellà Cuesta, Cristina, Castellano Martínez, Manuel Antonio, Catalán Félez, Rafael, Cavada García, Miguel Ángel, Cavada Velasco, Antonio, Cidra Gordillo, Jose Luis, Clemente Garcia, Julia, Collada Jiménez, José Luis, Cornejo Figueroa, Andrés, Cornejo Rodríguez, Roberto, Cuevas Morales, Julio, Curado-Moliní Álvarez, María Jesús, Daviña Romero, Susana, de Arriba Muñoz, Leonor, de la Flor Benítez, Manuel, de la Poza Abad, Mariam, de los Bueis Martinez, Gustavo, de Miguel Márquez, María Pía, de Pablo Martín, Jesús, Delgado Mora, Manuel, Díaz Mateo, Joaquín, Díaz Saborido, Almudena, Díez-Caballero Murua, María, Doganis Peppas, Constantino, Domínguez Alonso, Gonzalo, Domínguez Ávila, Julián, Domínguez González, María Nieves, Domínguez Hernández, María Isabel, Dosantos Hernández, Javier Oscar, Dueñas Buey, Aurelio, Eiris Cambre, M. Jesús, El Wafa Vaca, Yussef Abu, Enseñat Sanchez, Antonio Alberto, Esquerra Tuñí, Eulalia, Esteve Ribelles, José María, Estevez Barrondo, José Antonio, Estraviz Vidal, M. Dolores, Fajardo Salguero, Rosa María, Felipe Olivero, José Francisco, Fernández Bujía, María Luisa, Fernández Cano, Patricia, Fernández Cañaveras, M. Isabel, Fernández Fernández, Carmen, Fernández García, José Manuel, Fernández Gómez, Patricia, Fernández González, José María, Fernández Gutiérrez Denia, Irene, Fernández Huelga, M. Esther, Fernández Martin, Yolanda, Fernández Navarro, Francisco, Fernández Revuelta, Araceli, Fernández Toro, José María, Fernández-Pacheco Corchado, Luis María, Ferrándiz Miquel, Joaquín, Ferrari Piquero, Carmen, Ferrer García-Borrás, José María, Gago Fernandez, Carlos, Gago Gómez, Fernando, Galera de Ulierte, Luz Inmaculada, Gallegos Juárez, Ingrid, Garceran Azorín-Gómez, José Enrique, Garcés Romero, Carmen, García Alonso, Francisco Javier, García Cabana, Andres A., García Cano, Josefa, García Ceballos, Victoria Gema, García de Francisco, Sara, García Fuentes, Francisco, García Vázquez, Yolanda, García Collado, Sergio, García-Giralda Ruiz, Luis, García-Serrano Jiménez, Beatriz, Garrido Pérez, Montse, Garro Mendiolagaray, Jon Kepa, Gea Villar, Jorge, Genover Llimona, Teresa, Gil Moreno, Felipe, Gil Pastor, Javier Julián, Gispert Servitje, Adrià, Godoy García, Isidro Domingo, Gómez Martínez, Gabriel, Gómez Sanmiguel, Francisco Javier, Gómez Yelo, Jose, Gonzales Flores, Pedro Alejandro, González Hernández, Luis, Gonzálvez Rey, Jaime, Gorgues Comas, Roberto, Guillen Anton, María Victoria, Gutiérrez Almarza, Miguel Ángel, Gutiérrez Esteban, Jose Luis, Guzón Centeno, Marta, Hermoso Sabio, Antonio, Hernández Castellanos, Manuel, Hernández Pérez, Ana, Herranz Alfaro, Alfredo, Hinojosa Díaz, José Francisco, Iglesias Fernández, José, Intxausti Erdoiza, Iñaki, Izarra Páramo, Miriam, Jiménez Marcen, Ana Isabel, Jimeno Bernad, Rosa María, Jover Andreu, María José, Juan Alcaraz, Francisco Emilio, Labrador Arranz, Esther, Laencina López, Salvador, Lapuente Troncoso, Elena, Latorre Cásedas, Montserrat, Leal Hernández, Mariano, Ledesma Santiago, Lourdes, Lillo Bravo, Francisco Javier, Lizarribar Sans, Marta, Lobato Martínez, Rocío, López Alonso, Emilia Begoña, López Cruz, Urbano, López Chamon, Silvia, López de Viñaspre Muguerza, Ana Isabel, López Herranz, Ana Belén, López Marina, Víctor, López Ortiz, Francisco, López Silva, Mª Carmen, Lucas Boronat, José María, Lugo Ramos, Héctor Leonardo, Lutz Garcia, Erika, Llosa Ventura, Juan Luis, Macías Corbacho, Antonio, Magem Niubo, Juan, Mancilla las Heras, Diego, Maneu Juan, Alfonso, Manzano Jiménez, José, Mañes Vicente, Pascual, Maranges Comella, María Isabel, Marco Segarra, Emilio, María Tablado, Miguel Ángel, Marlasca Garcia, Juan Carlos, Martí Canales, Juan Carlos, Martín Clos, José, Martín de la Vega, Saúl, Martín Ruiz Lavela, Francisco, Martinez Aparicio, M. Desamparada, Martínez de Carnero Calzada, Rafael, Martinez González, Agustín, Martínez Jiménez, Juan Manuel, Martínez Laguna, Daniel, Martínez Mayora, María Teresa, Martinez Merodio, Pilar, Martínez Novoa, Luis, Martínez Ortega, Mireia, Martínez Rojas, Francisco, Martínez Rossello, Antonio, Meijome Sánchez, María del Carmen, Méndez-Cabeza Velázquez, Jesús, Méndez Maiques, Jose María, Misericordia Garcia, Santiago, Molina Cabildo, José, Molina Martínez, Luis Javier, Monge García, José Manuel, Montes Belloso, María Ester, Moreno Molina, Susana, Motos Díaz, Patrocinio, Mourelo Cereijo, Marta, Moyá Amengual, Ana, Muñoz Ruiz, Pedro José, Narváez Martín, José María, Navarro Luna, Juan Luis, Navarro Tarin, Fernando, Nicolau Grego, Jorge, Niño Azcarate, Cristina, Nova Alvarez, José, Núñez Cordón, Juan Carlos, Olagorta de Prado, Asunción, Oros Espinosa, Vicente, Ortega Pinilla, M. Concepción, Ortega Ruiz, María Paz, Osca Pellicer, David, Otamendi Murillo, Ana, Otero Mata, Manuel, Ouzzine Marín, Myriam, Paja Fano, Eduardo, Palacio Gonzalez, Domingo, Palau Oñate, Rosario, Pazos Garrido, Néstor, Pecharroman Fuente, Virginia, Peña Rosa, Jose Manuel, Peral Cabot, Francisco Javier, Pérez Barreto, Iván Yamir, Pérez Caballero, Isabel, Pérez Fernández, Maria del Carmen, Pérez Fernández, Antonio Luis, Pérez Gutiérrez, Esteban, Pérez Rios, Manuel, Petit Sánchez, José Manuel, Piñero Acin, Maria José, Pozuelos Estrada, Jerónimo, Prieto Cid, Manuel, Prieto Gutiérrez, Joaquín, Raga Casasus, José Vicente, Ramírez Espinosa, Manuel Francisco, Rebollo Hernamperez, Eduardo, Rey Rañal, Alejandra, Ribelles Villalba, Ricardo Sagunto, Rodas Peral, José Antonio, Rodil Martinez, Aurora, Rodríguez, Manuel, José, Rodríguez Calcaño, Enrique Emperador, Rodríguez Fernandez, Concepción, Rodríguez Galipienzo, José Miguel, Rodriguez Lois, Miguel Ángel, Rodríguez Partida, José Antonio, Roel Conde, Jaime, Roman Rodriguez, Miguel, Romero Caballero, Gregorio, Romero Hernández, Pedro, Rosales García, Luis Miguel, Royo del Río, Manuel, Ruiz Gomes, María, Ruiz Moruno, Francisco Javier, Ruiz Perez, Jaime, Salinero Acevedo, José Ramón, Sánchez Apresa, Manuel, Sanchez Calavera, María Antonia, Sánchez Garcia, Fernando, Sánchez Gutiérrez, Miguel Ángel, Sánchez Ibáñez, Antonio, Sánchez López, Eugenio, Sánchez Loureiro, Manuel, Sanchez Lozano, Ana, Sánchez Romero, Gregorio, Sánchez Ruano, Fernando, Sánchez Ruiz, Gabriela, Sánchez Sanchez, Froilán, Santiago Ayarza, Asier, Santos Bermejo, Juan Antonio, Sanz de Miguel, Elena, Sanz Sanz, Marta, Sanz Velasco, Carmelina, Sauco Colón, Inmaculada, Sedano García, José Ignacio, Segovia Castro, Luis, Senan Sanz, María Rosa, Serra Cabot, Pere, Serra Gallego, Marta, Serrano Tomás, Daniel, Sesma Aisa, Francisco Tomás, Seuba Garcés, Jordi, Soler David, Vicente, Soria Mesa, Jose Antonio, Sosa Álvarez, César, Suárez Pérez, María, Tafalla Martín, Antonio, Tamayo Ferriol, Thaimi, Tamayo Marín, José Luis, Thalamas Atienza, Juan Aitor, Toledo Muñoz, Ana María, Tomás-Rodo Massaneda, Lluis Miquel, Torres de Castro, Milko, Torres Martínez, Francisco Javier, Tovar Álvarez, Enrique, Ugarte Goñi, Ainhoa, Valle González, Irene, Vasco Mahillo, Sonia, Enrique José, Vázquez Seijas, Vericat Roure, Antonio, Villalba Parrado, Arelis, Villanueva Rebollo, Jose María, Villar Valgañon, Ricardo, Villena Masegosa, Vicente, Viñals Gigena, Montserrat, Viñas Cabrera, Lydia, Zarco Pinteño, David, Roman-Rodriguez, M., Molina-Paris, J., and Fernandez Sanchez, A.

Published
2021
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15. Seguimiento de las guías españolas para el manejo del asma por el médico de atención primaria: un estudio observacional ambispectivo

Author

Abedianzadeh Timar, Mohsen, Acha Domínguez, Jesús, Aguaviva Bascuñana, Jesus, Aguilar Martín, Ignacio, Ales Conejo, Francisco Ignacio, Alfaro González, Juan Vicente, Alfonso Landa, Patricia, Altés Boronat, Andrés, Álvarez Arriero, Jesús Joaquín, Álvarez Rojo, Juan Ángel, Vidal German, Allut, Amaro Cendón, Jesús, Amiano Arregui, María Teresa, Angulo Vallejo, Esther, Anton Álvarez, Juan José, Anton Ortega, Javier, Arconada Perez, Ana, Ardiaca Burgués, Lidia, Armario Vázquez, Juan Manuel, Arroyo Cubeiro, Amador, Aso Mendialdea, Koldo, Attardo, Francesca, Ávila de Tomás, José Francisco, Avinent Arnal, M. Jesús, Aznar Aguilar, Francisco, Aznar Tejero, Pilar, Baena Montilla, Emilio, Baeza López, José María, Barón Carrillo, Juan José, Bartolomé Resano, Rafael, Becoña de la Torre, Francisco, Benavent Martín, Isabel, Benedí Sánchez, María Teresa, Berrocal del Brío, José, Blanco Delgado, Antonio, Bleda Cano, Jesús, Boladeras Sabater, Josep, Bolívar Mantilla, Zenaida, Brito Brito, Elisenda, Burgos Parra, M. Rosario, Buxadé Martí, Isaac, Caballero Garcia, Juan Carlos, Cabañas Enríquez, Luis Fernando, Calviño Cerqueiro, Marcelino, Calvo Fernández, Juan, Calle Velles, Felipe, Camaro Zafra, Beatriz, Campomar Quetlas, Jaume, Capitán Jurado, Mónica, Cárdenas Joyanes, Dolores, Carles Bueso, Gonzalo, Carvajal Puente, Cristina, Casado Rodriguez, Cristina, Casanova García, Carlos, Castellà Cahiz, Santiago, Castellà Cuesta, Cristina, Castellano Martínez, Manuel Antonio, Catalán Félez, Rafael, Cavada García, Miguel Ángel, Cavada Velasco, Antonio, Cidra Gordillo, Jose Luis, Clemente Garcia, Julia, Collada Jiménez, José Luis, Cornejo Figueroa, Andrés, Cornejo Rodríguez, Roberto, Cuevas Morales, Julio, Curado-Moliní Álvarez, María Jesús, Daviña Romero, Susana, de Arriba Muñoz, Leonor, de la Flor Benítez, Manuel, de la Poza Abad, Mariam, de los Bueis Martinez, Gustavo, de Miguel Márquez, María Pía, de Pablo Martín, Jesús, Delgado Mora, Manuel, Díaz Mateo, Joaquín, Díaz Saborido, Almudena, Díez-Caballero Murua, María, Doganis Peppas, Constantino, Domínguez Alonso, Gonzalo, Domínguez Ávila, Julián, Domínguez González, María Nieves, Domínguez Hernández, María Isabel, Dosantos Hernández, Javier Oscar, Dueñas Buey, Aurelio, Eiris Cambre, M. Jesús, El Wafa Vaca, Yussef Abu, Enseñat Sanchez, Antonio Alberto, Esquerra Tuñí, Eulalia, Esteve Ribelles, José María, Estevez Barrondo, José Antonio, Estraviz Vidal, M. Dolores, Fajardo Salguero, Rosa María, Felipe Olivero, José Francisco, Fernández Bujía, María Luisa, Fernández Cano, Patricia, Fernández Cañaveras, M. Isabel, Fernández Fernández, Carmen, Fernández García, José Manuel, Fernández Gómez, Patricia, Fernández González, José María, Fernández Gutiérrez Denia, Irene, Fernández Huelga, M. Esther, Fernández Martin, Yolanda, Fernández Navarro, Francisco, Fernández Revuelta, Araceli, Fernández Toro, José María, Fernández-Pacheco Corchado, Luis María, Ferrándiz Miquel, Joaquín, Ferrari Piquero, Carmen, Ferrer García-Borrás, José María, Gago Fernandez, Carlos, Gago Gómez, Fernando, Galera de Ulierte, Luz Inmaculada, Gallegos Juárez, Ingrid, Garceran Azorín-Gómez, José Enrique, Garcés Romero, Carmen, García Alonso, Francisco Javier, García Cabana, Andres A., García Cano, Josefa, García Ceballos, Victoria Gema, García de Francisco, Sara, García Fuentes, Francisco, García Vázquez, Yolanda, García Collado, Sergio, García-Giralda Ruiz, Luis, García-Serrano Jiménez, Beatriz, Garrido Pérez, Montse, Garro Mendiolagaray, Jon Kepa, Gea Villar, Jorge, Genover Llimona, Teresa, Gil Moreno, Felipe, Gil Pastor, Javier Julián, Gispert Servitje, Adrià, Godoy García, Isidro Domingo, Gómez Martínez, Gabriel, Gómez Sanmiguel, Francisco Javier, Gómez Yelo, Jose, Gonzales Flores, Pedro Alejandro, González Hernández, Luis, Gonzálvez Rey, Jaime, Gorgues Comas, Roberto, Guillen Anton, María Victoria, Gutiérrez Almarza, Miguel Ángel, Gutiérrez Esteban, Jose Luis, Guzón Centeno, Marta, Hermoso Sabio, Antonio, Hernández Castellanos, Manuel, Hernández Pérez, Ana, Herranz Alfaro, Alfredo, Hinojosa Díaz, José Francisco, Iglesias Fernández, José, Intxausti Erdoiza, Iñaki, Izarra Páramo, Miriam, Jiménez Marcen, Ana Isabel, Jimeno Bernad, Rosa María, Jover Andreu, María José, Juan Alcaraz, Francisco Emilio, Labrador Arranz, Esther, Laencina López, Salvador, Lapuente Troncoso, Elena, Latorre Cásedas, Montserrat, Leal Hernández, Mariano, Ledesma Santiago, Lourdes, Lillo Bravo, Francisco Javier, Lizarribar Sans, Marta, Lobato Martínez, Rocío, López Alonso, Emilia Begoña, López Cruz, Urbano, López Chamon, Silvia, López de Viñaspre Muguerza, Ana Isabel, López Herranz, Ana Belén, López Marina, Víctor, López Ortiz, Francisco, López Silva, M.a Carmen, Lucas Boronat, José María, Lugo Ramos, Héctor Leonardo, Lutz Garcia, Erika, Llosa Ventura, Juan Luis, Macías Corbacho, Antonio, Magem Niubo, Juan, Mancilla las Heras, Diego, Maneu Juan, Alfonso, Manzano Jiménez, José, Mañes Vicente, Pascual, Maranges Comella, María Isabel, Marco Segarra, Emilio, María Tablado, Miguel Ángel, Marlasca Garcia, Juan Carlos, Martí Canales, Juan Carlos, Martín Clos, José, Martín de la Vega, Saúl, Martín Ruiz Lavela, Francisco, Martinez Aparicio, M. Desamparada, Martínez de Carnero Calzada, Rafael, Martinez González, Agustín, Martínez Jiménez, Juan Manuel, Martínez Laguna, Daniel, Martínez Mayora, María Teresa, Martinez Merodio, Pilar, Martínez Novoa, Luis, Martínez Ortega, Mireia, Martínez Rojas, Francisco, Martínez Rossello, Antonio, Meijome Sánchez, María del Carmen, Méndez-Cabeza Velázquez, Jesús, Méndez Maiques, Jose María, Misericordia Garcia, Santiago, Molina Cabildo, José, Molina Martínez, Luis Javier, Monge García, José Manuel, Montes Belloso, María Ester, Moreno Molina, Susana, Motos Díaz, Patrocinio, Mourelo Cereijo, Marta, Moyá Amengual, Ana, Muñoz Ruiz, Pedro José, Narváez Martín, José María, Navarro Luna, Juan Luis, Navarro Tarin, Fernando, Nicolau Grego, Jorge, Niño Azcarate, Cristina, Nova Alvarez, José, Núñez Cordón, Juan Carlos, Olagorta de Prado, Asunción, Oros Espinosa, Vicente, Ortega Pinilla, M. Concepción, Ortega Ruiz, María Paz, Osca Pellicer, David, Otamendi Murillo, Ana, Otero Mata, Manuel, Ouzzine Marín, Myriam, Paja Fano, Eduardo, Palacio Gonzalez, Domingo, Palau Oñate, Rosario, Pazos Garrido, Néstor, Pecharroman Fuente, Virginia, Peña Rosa, Jose Manuel, Peral Cabot, Francisco Javier, Pérez Barreto, Iván Yamir, Pérez Caballero, Isabel, Pérez Fernández, Maria del Carmen, Pérez Fernández, Antonio Luis, Pérez Gutiérrez, Esteban, Pérez Rios, Manuel, Petit Sánchez, José Manuel, Piñero Acin, Maria José, Pozuelos Estrada, Jerónimo, Prieto Cid, Manuel, Prieto Gutiérrez, Joaquín, Raga Casasus, José Vicente, Ramírez Espinosa, Manuel Francisco, Rebollo Hernamperez, Eduardo, Rey Rañal, Alejandra, Ribelles Villalba, Ricardo Sagunto, Rodas Peral, José Antonio, Rodil Martinez, Aurora, Rodríguez, Manuel, José, Rodríguez Calcaño, Enrique Emperador, Rodríguez Fernandez, Concepción, Rodríguez Galipienzo, José Miguel, Rodriguez Lois, Miguel Ángel, Rodríguez Partida, José Antonio, Roel Conde, Jaime, Roman Rodriguez, Miguel, Romero Caballero, Gregorio, Romero Hernández, Pedro, Rosales García, Luis Miguel, Royo del Río, Manuel, Ruiz Gomes, María, Ruiz Moruno, Francisco Javier, Ruiz Perez, Jaime, Salinero Acevedo, José Ramón, Sánchez Apresa, Manuel, Sanchez Calavera, María Antonia, Sánchez Garcia, Fernando, Sánchez Gutiérrez, Miguel Ángel, Sánchez Ibáñez, Antonio, Sánchez López, Eugenio, Sánchez Loureiro, Manuel, Sanchez Lozano, Ana, Sánchez Romero, Gregorio, Sánchez Ruano, Fernando, Sánchez Ruiz, Gabriela, Sánchez Sanchez, Froilán, Santiago Ayarza, Asier, Santos Bermejo, Juan Antonio, Sanz de Miguel, Elena, Sanz Sanz, Marta, Sanz Velasco, Carmelina, Sauco Colón, Inmaculada, Sedano García, José Ignacio, Segovia Castro, Luis, Senan Sanz, María Rosa, Serra Cabot, Pere, Serra Gallego, Marta, Serrano Tomás, Daniel, Sesma Aisa, Francisco Tomás, Seuba Garcés, Jordi, Soler David, Vicente, Soria Mesa, Jose Antonio, Sosa Álvarez, César, Suárez Pérez, María, Tafalla Martín, Antonio, Tamayo Ferriol, Thaimi, Tamayo Marín, José Luis, Thalamas Atienza, Juan Aitor, Toledo Muñoz, Ana María, Tomás-Rodo Massaneda, Lluis Miquel, Torres de Castro, Milko, Torres Martínez, Francisco Javier, Tovar Álvarez, Enrique, Ugarte Goñi, Ainhoa, Valle González, Irene, Vasco Mahillo, Sonia, Enrique José, Vázquez Seijas, Vericat Roure, Antonio, Villalba Parrado, Arelis, Villanueva Rebollo, Jose María, Villar Valgañon, Ricardo, Villena Masegosa, Vicente, Viñals Gigena, Montserrat, Viñas Cabrera, Lydia, Zarco Pinteño, David, Roman-Rodriguez, M., Molina-Paris, J., and Fernandez-Sanchez, A.

Published
2021
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16. Reactive capture and electrochemical conversion of CO2 with ionic liquids and deep eutectic solvents.

Author

Dongare, Saudagar, Zeeshan, Muhammad, Aydogdu, Ahmet Safa, Dikki, Ruth, Kurtoğlu-Öztulum, Samira F., Coskun, Oguz Kagan, Muñoz, Miguel, Banerjee, Avishek, Gautam, Manu, Ross, R. Dominic, Stanley, Jared S., Brower, Rowan S., Muchharla, Baleeswaraiah, Sacci, Robert L., Velázquez, Jesús M., Kumar, Bijandra, Yang, Jenny Y., Hahn, Christopher, Keskin, Seda, and Morales-Guio, Carlos G.

Subjects
IONIC liquids, NONAQUEOUS solvents, SOLVENTS, AQUEOUS electrolytes, ELECTROLYTIC reduction, SOLUBILITY, EUTECTICS
Abstract

Ionic liquids (ILs) and deep eutectic solvents (DESs) have tremendous potential for reactive capture and conversion (RCC) of CO2 due to their wide electrochemical stability window, low volatility, and high CO2 solubility. There is environmental and economic interest in the direct utilization of the captured CO2 using electrified and modular processes that forgo the thermal- or pressure-swing regeneration steps to concentrate CO2, eliminating the need to compress, transport, or store the gas. The conventional electrochemical conversion of CO2 with aqueous electrolytes presents limited CO2 solubility and high energy requirement to achieve industrially relevant products. Additionally, aqueous systems have competitive hydrogen evolution. In the past decade, there has been significant progress toward the design of ILs and DESs, and their composites to separate CO2 from dilute streams. In parallel, but not necessarily in synergy, there have been studies focused on a few select ILs and DESs for electrochemical reduction of CO2, often diluting them with aqueous or non-aqueous solvents. The resulting electrode–electrolyte interfaces present a complex speciation for RCC. In this review, we describe how the ILs and DESs are tuned for RCC and specifically address the CO2 chemisorption and electroreduction mechanisms. Critical bulk and interfacial properties of ILs and DESs are discussed in the context of RCC, and the potential of these electrolytes are presented through a techno-economic evaluation. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Development of a Six-Degree-of-Freedom Analog 3D Tactile Probe Based on Non-Contact 2D Sensors.

Author

Albajez, José Antonio, Velázquez, Jesús, Torralba, Marta, Díaz-Pérez, Lucía C., Yagüe-Fabra, José Antonio, and Aguilar, Juan José

Subjects
*DETECTORS, *STATISTICAL reliability, *CALIBRATION, *HAPTIC devices
Abstract

In this paper, a six-degree-of-freedom analog tactile probe with a new, simple, and robust mechanical design is presented. Its design is based on the use of one elastomeric ring that supports the stylus carrier and allows its movement inside a cubic measuring range of ±3 mm. The position of the probe tip is determined by three low-cost, noncontact, 2D PSD (position-sensitive detector) sensors, facilitating a wider application of this probe to different measuring systems compared to commercial ones. However, several software corrections, regarding the size and orientation of the three LED light beams, must be carried out when using these 2D sensors for this application due to the lack of additional focusing or collimating lenses and the very wide measuring range. The development process, simulation results, correction models, experimental tests, and calibration of this probe are presented. The results demonstrate high repeatability along the X-, Y-, and Z-axes (2.0 µm, 2.0 µm, and 2.1 µm, respectively) and overall accuracies of 6.7 µm, 7.0 µm, and 8.0 µm, respectively, which could be minimized by more complex correction models. [ABSTRACT FROM AUTHOR]

Published
2024
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22. From Ln2O2S to Ln10OS14: exploring the sulphur spectrum of trivalent lanthanoid oxysulphides.

Author

Wuille Bille, Brian A. and Velázquez, Jesús M.

Subjects
*SULFUR, *ELECTRONIC structure, *SYMMETRY
Abstract

While Ln2O2S oxysulphides have increasingly gained attention due to their structural and optoelectronic properties, an expansive compositional space lies beyond as the sulphur-to-oxygen ratio increases. In these oxysulphides, the compounded effect of the 4f states is manifold in the lanthanoid ions and the changing bonding and environment symmetry enables the tuning of their electronic structure and photophysical properties. Their challenging syntheses have made these materials largely unexplored, but recent efforts have been made to bridge the knowledge gap. In this article we present some of the structural characteristics and photophysical properties of the lanthanoid oxysulphide spectrum LnxOySz. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Electrochemical control over stoichiometry via cation intercalation into Chevrel-phase sulphides (CuxMo6S8, x = 1–3).

Author

Ritter, Kabian A., Mason, Konstantina G., Yew, Suxuen, Perryman, Joseph T., Ortiz-Rodríguez, Jessica C., Singstock, Nicholas R., Wuille Bille, Brian A., Musgrave, Charles B., and Velázquez, Jesús M.

Abstract

This work presents a systematic investigation of the electrochemical intercalation of aqueous copper cations into the Chevrel phase (CP) Mo6S8 and its effect on the host's electronic and structural characteristics as a function of stoichiometry. The electrochemical potentials at which copper intercalates into the CP Mo6S8 host in 1 M CuSO4 were identified for CuxMo6S8 (x = 1–3) as 0.23 V, 0.11 V, and 0.055 V (vs. Cu/Cu2+) for Cu1Mo6S8, Cu2Mo6S8, and Cu3Mo6S8, respectively, and correlated via ex situ PXRD to stoichiometric content. Potentials were also identified that yield non-stoichiometric phases with traceable Cu content-dependent structural changes. Ab initio DFT calculations were performed to probe thermodynamic stability of CuxMo6S8 CP compositions and the metal-to-semiconductor transitions as a function of copper content. Lastly, we demonstrate that the SK-pre-edge intensity is a successful probe for intercalant content: as copper equivalents increase, so does charge transfer to the partially occupied S 3p orbitals, resulting in a decrease in the pre-edge intensity corresponding to the excitation of a S 1s-to-3p/Mo 4d hybridized orbital. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Gradually modified fibers of Yucca Filifera (Asparagaceae) as biodegradable and mechanical reinforcement of polypropylene composites.

Author

Medellín Rodríguez, Francisco J., Gudiño Rivera, Javier, Rodríguez Velázquez, Jesús Gilberto, Lara Sánchez, Jesús Francisco, and Salinas Hernández, Myrna

Subjects
POLYPROPYLENE fibers, ASPARAGACEAE, MEASUREMENT of viscosity, POLYPROPYLENE, FIBERS, BIODEGRADABLE plastics, PLANT fibers, FIBROUS composites
Abstract

The preparation and characterization of Yucca Filifera (Asparagaceae) fibers (YFF) and their incorporation into polypropylene (PP) matrices of two molecular weights are reported. Apart from the fibers sectioning and dehydration, saponates, phenols, hemicellulose, and lignin were systematically extracted. Moisture was a primary factor in the as‐sectioned samples, and dehydration was followed by volatiles extraction, including saponates and phenols. An optimized mixture of alcohols (80% methanol/20% ethanol v/v) was used to extract the remaining volatiles (adsorbed water, phenols, and saponates). The dried fibers were then cyclically treated in an autoclave using a dilute sodium hydroxide (NaOH) with the purpose of decreasing external lignin and hemicellulose. After extractions, the fiber product was directly incorporated into PP of two molecular weights, film/fiber (PP35) and injection molding (PP11) grades. The average crystallization temperatures from the melt increased slightly in the presence of YFF as an indication of heterogeneous nucleation. Although the crystallization degree decreased perceptibly depending on the fiber content. The apparent viscosity measurements as a function of shear rate, at low fiber concentrations (10 wt%), displayed partial compatibility between the treated YFF and PP11. In contrast, high fiber concentrations (30 wt%) in PP35 showed only a range of partial compatibility at high shear rates. Mechanical elongation and bending demonstrated an increase in the corresponding moduli as an indication of fiber reinforcement with a biodegradable additive. The higher tensile modulus was obtained at the expense of mechanical deformation. Highlights: A desert plant fiber works as reinforcement for PP composites.The fibers preparation extracts saponates, phenols, and partially lignin and hemicellulose.Fibers are heterogeneous enough for compatibility with the PP matrices.Fibers mechanically reinforced PP in proportion to their concentration.Reinforcement depends on the molecular weight of the PP matrix. [ABSTRACT FROM AUTHOR]

Published
2024
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28. Should high‐cobalt EV batteries be repurposed? Using LCA to assess the impact of technological innovation on the waste hierarchy.

Author

Dunn, Jessica, Ritter, Kabian, Velázquez, Jesús M., and Kendall, Alissa

Subjects
ELECTRIC vehicle batteries, COBALT, TECHNICAL textiles, TECHNOLOGICAL innovations, SILICON films, LITHIUM-ion batteries, ENERGY development, PRODUCT life cycle assessment
Abstract

Lithium‐ion batteries (LIBs) are a key technology in decarbonizing the transportation and electricity sectors, yet the use of critical materials, such as cobalt, nickel, and lithium, lead to environmental and social impacts. Reusing, repurposing, and recycling mitigate battery impacts by extending their lifespan and reducing reliance on virgin materials. Innovation that reduces demand for these problematic materials and increases battery efficiency also reduces impacts. Two examples of this technological innovation include, (1) the development of energy dense cathode chemistry containing less cobalt, a material with high social and environmental impacts; and (2) the use of columnar silicon thin film anode, which results in increased energy density compared to the commonly used graphite anode. This research assesses whether these technological innovations change the currently understood waste hierarchy, which prioritizes reuse or repurposing prior to recycling. This is of interest because retired high‐cobalt batteries could supply their constituent materials sooner if recycled immediately and be used in low‐cobalt, higher‐performing batteries. The assessment considers the life cycle environmental impacts of two end‐of‐life management routes for a high‐cobalt LIB: first, recycling the battery immediately after the first use life to produce a new, and less material intensive battery, and second, repurposing the battery for a stationary storage application followed by recycling. Findings show that battery reuse reduces life cycle environmental impacts relative to immediate recycling. Thus, from an environmental perspective, the waste hierarchy holds, and steps to retain the batteries in their highest value use, such as through repurposing, should still be prioritized. [ABSTRACT FROM AUTHOR]

Published
2023
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29. Electrochemical surface science twenty years later: Expeditions into the electrocatalysis of reactions at the core of artificial photosynthesis

Author

Soriaga, Manuel P., Baricuatro, Jack H., Cummins, Kyle D., Kim, Youn-Geun, Saadi, Fadl H., Sun, Guofeng, McCrory, Charles C.L., McKone, James R., Velazquez, Jesus M., Ferrer, Ivonne M., Carim, Azhar I., Javier, Alnald, Chmielowiec, Brian, Lacy, David C., Gregoire, John M., Sanabria-Chinchilla, Jean, Amashukeli, Xenia, Royea, William J., Brunschwig, Bruce S., Hemminger, John C., Lewis, Nathan S., and Stickney, John L.

Published
2015
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34. Flocking and formation control for a group of nonholonomic wheeled mobile robots.

Author

Pliego-Jiménez, Javier, Martínez-Clark, Rigoberto, Cruz-Hernández, César, David Avilés-Velázquez, Jesús, and Francisco Flores-Resendiz, Juan

Subjects
MOBILE robots, GROUP formation, CONTROL groups, GRAPH theory, NONHOLONOMIC constraints, EXPERIMENTAL groups
Abstract

The problem of flocking and formation of a group of nonholonomic wheeled mobile robot is addressed in this paper. Based on the cascade structure of the kinematic model, two kinematic controllers are proposed to achieve formation and flocking behaviors. The proposed control laws present a P and PI-like structure plus a feedforward term and do not require complex calculations. The interaction between the robots is modeled using graph theory. The performance of the proposed control laws is validated by experimental tests on a group of four differentialdrive wheeled mobile robots. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Direct solid-state nucleation and charge-transport dynamics of alkali metal-intercalated M2Mo6S6 (M = K, Rb, Cs) nanorods.

Author

Perryman, Joseph T., Kulkarni, Ambarish R., and Velázquez, Jesús M.

Abstract

Microwave-assisted solid-state heating has been employed to control anisotropic growth of M2Mo6S6 (M = K, Rb, Cs) pseudo-Chevrel phase nanorods without a growth template for the first time. Pronounced preferential crystal nucleation along the hexagonal axis is observed, and electrochemical methods are implemented to elucidate viability for employment of these materials in energy storage and energy conversion systems. It is observed that these nanomaterials exhibit moderate and under-explored capacitive behavior with charge storage capabilities ranging from 2–8 F g−1 in strongly acidic aqueous electrolyte, as well as promising electrochemical performance, evolving hydrogen gas at 10 mA cm−2 under an applied bias of less than 300 mV vs. RHE. [ABSTRACT FROM AUTHOR]

Published
2020
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45. Relationship between COVID-19 and Arterial Hypertension.

Author

Giralt-Herrera, Alejandro, Miguel Rojas-Velázquez, Jesús, and Leiva-Enríquez, Jessica

Subjects
COVID-19, HYPERTENSION, VIRAL proteins, ANGIOTENSIN converting enzyme, ANGIOTENSIN-receptor blockers
Abstract

Copyright of Revista Habanera de Ciencias Médicas is the property of Universidad de Ciencias Medicas de La Habana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020

47. Detección de malatión en larvas de dípteros de importancia forense en el noreste de México.

Author

ESTRADA-CAMACHO, ISRAEL, LUIS HERNÁNDEZ-MENDOZA, JOSÉ, TORRES-ORTEGA, JORGE, DI CARLO QUIROZ-VELÁZQUEZ, JESÚS, and VILLARREAL-SOTELO, KARLA

Subjects
MALATHION, RF values (Chromatography), POISONING, PESTICIDES, PUBLIC health
Abstract

Copyright of Revista Colombiana de Entomología is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020
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48. Factores predictivos de complicaciones intrahospitalarias en el Síndrome coronario agudo sin elevación del segmento ST.

Author

Giralt-Herrera, Alejandro, Miguel Rojas-Velázquez, Jesús, de la Torre Fonseca, Luis Mariano, and Machín-Legón, Milagro

Abstract

Copyright of Revista Habanera de Ciencias Médicas is the property of Universidad de Ciencias Medicas de La Habana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019

49. Patrón de «de Winter» en paciente con síndrome coronario agudo sin elevación del segmento ST.

Author

de la Torre Fonseca, Luis M., Pérez Fernández, Anabel, Echavarría Sifontes, Lila, Mederos Hernández, Jorge, Rojas-Velázquez, Jesús M., Machín-Legón, Milagro, and Giralt-Herrera, Alejandro

Abstract

Copyright of CorSalud is the property of Cardiocentro Ernesto Che Guevara and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019

50. Complicaciones no letales en el infarto agudo de miocardio: Análisis en una unidad de cuidados coronarios.

Author

Rojas-Velázquez, Jesús M., de la Torre Fonseca, Luis M., Giralt-Herrera, Alejandro, Machín-Legón, Milagro, and Leiva-Enríquez, Jennifer

Abstract

Introduction: Acute Myocardial Infarction is defined as the presence of acute myocardial injury detected by the use of cardiac biomarkers in the demonstrated evidence of acute myocardial ischemia. Objectives: To evaluate possible factors associated with the appearance of nonlethal in-hospital complications in patients presenting with ST-segment elevation acute myocardial infarction. Method: An observational, analytical, cross-sectional study was conducted in the Intensive Coronary Care Unit of the "Hospital Clínico-Quirúrgico Manuel Fajardo" in 2016 and 2017. The descriptive statistical method and the necessary statistical tests (X2 or Fisher's Exact Test, odds ratio and Student's t-test) were used. Results: The male sex predominated (59.0%) and the average age was 62 years. Only 41.0% of patients received fibrinolysis. Dyslipidemia showed a statistically significant association with the appearance of complications (p=0.046). Age was related to the appearance of hemodynamic complications (p=0.02). There were no statistically significant differences between patients who received thrombolysis and those who did not, regarding complications (OR=1.33; CI 95%: 0.54-3.24), nor between these and the topography of the infarction (anterior wall OR=0.57; CI 95%: 0.23-1.43; inferior wall OR=1.73; CI 95%: 0.70-4.27). Conclusions: Dyslipidemia was associated with the appearance of complications in patients with acute myocardial infarction. Age was associated with hemodynamic complications. Thrombolytic therapy and the affected myocardial walls were not related to the occurrence of non-lethal in-hospital complications. [ABSTRACT FROM AUTHOR]

Published
2019

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