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1. Synthesis of Group-IV ternary and binary semiconductors using epitaxy of $\rm GeH_3Cl$ and $\rm SnH_4$

Author

Zhang, Aixin, Ringuala, Dhruve A., Mircovich, Matthew A., Roldan, Manuel A., Kouvetakis, John, and Menéndez, José

Subjects
Condensed Matter - Materials Science
Abstract

$\rm{Ge}_{1-x-y}Si_{x}Sn_{y}$ alloys were grown on Ge buffer layers at ultra-low temperature using reactions of $\rm SnH_{4}$ and $\rm GeH_{3}Cl$ for the first time. The latter is a newly introduced CVD source designed for epitaxial development of group IV semiconductors under low thermal budgets and CMOS compatible conditions. The $\rm{Ge}_{1-x-y}Si_{x}Sn_{y}$ films were produced between 160-200oC with 3-5% Si and ~ 5-11 % Sn, which traverses the indirect to direct gap transition in Ge-Sn materials. The films were fully strained to Ge and exhibited defect-free microstructures, flat surfaces, homogeneous compositions, uniform thicknesses and sharp interfaces as required for device manufacturing. A comparative study was then conducted to investigate the applicability of $\rm GeH_{3}Cl$ for the synthesis of $\rm Ge_{1-y}Sn_{y}$ binaries under similar experimental conditions. The$\rm Ge_{1-y}Sn_{y}$ films were grown fully strained to Ge, but with reduced Sn compositions ranging from ~ 2 - 7 % and lower thicknesses relative to $\rm{Ge}_{1-x-y}Si_{x}Sn_{y}$. This prompted efforts to further investigate the growth behavior of $\rm Ge_{1-y}Sn_{y}$ using the $\rm GeH_{3}Cl$ method, bypassing the Ge buffer to produce samples directly on Si, with the aim of exploring how to manage interface strain. In this case the $\rm Ge_{1-y}Sn_{y}$ on Si films exhibited compositions and thicknesses comparable to $\rm Ge_{1-y}Sn_{y}$-on-Ge films; however, their strain states were mostly relaxed, presumably due to the large misfit between $\rm Ge_{1-y}Sn_{y}$ and Si. Efforts to increase the concentration and thickness of these samples resulted in non-homogeneous multi-phase materials containing large amounts of interstitial Sn impurities., Comment: 16 pages, 9 figures

Published
2024

2. A practical theoretical model for Ge-like epitaxial diodes: I. The I-V characteristics

Author

Mircovich, Matthew A., Kouvetakis, John, and Menéndez, José

Subjects
Condensed Matter - Materials Science
Abstract

A practical quantitative model is presented to account for the I-V characteristics of pin diodes based on epitaxial Ge-like materials. The model can be used to quantify how the different material properties and recombination mechanisms affect the diode performance. The importance of dislocations, non-passivated defects, and residual intrinsic layer doping in determining the qualitative shape of the I-V curves is discussed in detail. Examples are shown covering literature diodes as well as diodes fabricated with the purpose of validating the theoretical effort., Comment: 18 pages. This article has been submitted to the Journal of Applied Physics. After it is published, it will be found at https://pubs.aip.org/aip/jap

Published
2023

3. Consistent optical and electrical determination of carrier concentrations for the accurate modeling of the transport properties of n-type Ge

Author

Menéndez, José, Xu, Chi, and Kouvetakis, John

Subjects
Condensed Matter - Materials Science
Abstract

A consistent methodology is presented to extract carrier concentrations in n-type Ge from measurements of the infrared dielectric function and the Hall effect. In the case of the optical measurements, usually carried out using spectroscopic ellipsometry, the carrier concentration is affected by the doping dependence of the conductivity effective mass, which is computed using a model of the electronic density of states that accounts for non-parabolicity and is fit to electronic structure calculations. Carrier concentrations obtained from Hall measurements require a knowledge of the Hall factor, which is arbitrarily set equal to unit in most practical applications. We have calculated the Hall factor for n-Ge using a model that accounts for scattering with phonons and with ionized impurities. We show that determinations of the carrier concentration n using our computed effective mass and Hall factor virtually eliminates any systematic discrepancy between the two types of measurement. We then use these results to compute majority carrier mobilities from measured resistivity values, to compare with measurements of minority carrier mobilities, and to fit empirical expressions to the doping dependence of the mobilities that can be used to model Ge devices., Comment: 11 pages, 5 fgures

Published
2023

14. A practical theoretical model for Ge-like epitaxial diodes: I. The I–V characteristics.

Author

Mircovich, Matthew A., Kouvetakis, John, and Menéndez, José

Subjects
DIODES, PIN diodes
Abstract

A practical quantitative model is presented to account for the I–V characteristics of pin diodes based on epitaxial Ge-like materials. The model can be used to quantify how the different material properties and recombination mechanisms affect the diode performance. The importance of dislocations, non-passivated defects, and residual intrinsic layer doping in determining the qualitative shape of the I–V curves is discussed in detail. Examples are shown covering literature diodes as well as diodes fabricated with the purpose of validating the theoretical effort. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Temperature-dependent photoluminescence in Ge: experiment and theory

Author

Menéndez, José, Poweleit, Christian D., and Tilton, Sean E.

Subjects
Condensed Matter - Materials Science
Abstract

We report a photoluminescence study of high-quality Ge samples at temperatures 12 K $\leq$ T $\leq$ 295 K, over a spectral range that covers phonon-assisted emission from the indirect gap (between the lowest conduction band at the L point of the Brillouin zone and the top of the valence band at the $\Gamma$ point), as well as direct gap emission (from the local minimum of the conduction band at the $\Gamma$ point). The spectra display a rich structure with a rapidly changing lineshape as a function of T. A theory is developed to account for the experimental results using analytical expressions for the contributions from LA, TO, LO, and TA phonons. Coupling of states exactly at the $\Gamma$ and L points is forbidden by symmetry for the latter two phonon modes, but becomes allowed for nearby states and can be accounted for using wave-vector dependent deformation potentials. Excellent agreement is obtained between predicted and observed photoluminescence lineshapes. A decomposition of the predicted signal in terms of the different phonon contributions implies that near room temperature indirect optical absorption and emission are dominated by forbidden processes, and the deformation potentials for allowed processes are smaller than previously assumed., Comment: 23 pages, 9 figures

Published
2020
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17. Contemporary use of cefazolin for MSSA infective endocarditis: analysis of a national prospective cohort

Author

Sánchez, Fernando Fernández, de Lomas, José Mª García, Rosas, Gabriel, de la Torre Lima, Javier, Bereciartua, Elena, Vidal, María José Blanco, Blanco, Roberto, Boado, María Victoria, Lázaro, Marta Campaña, Crespo, Alejandro, Carrión, Laura Guio, Del Álamo Martínez de Lagos, Mikel, Ugarte, Gorane Euba, Goikoetxea, Ane Josune, Hierro, Marta Ibarrola, Iruretagoyena, José Ramón, Zuazabal, Josu Irurzun, López-Soria, Leire, Montejo, Miguel, Nieto, Javier, Rodrigo, David, Rodríguez, Regino, Vitoria, Yolanda, Voces, Roberto, López, Mª Victoria García, Georgieva, Radka Ivanova, Ojeda, Guillermo, Bailón, Isabel Rodríguez, Morales, Josefa Ruiz, Rodríguez, Ignacio Álvarez, Galparsoro, Harkaitz Azkune, Boronat, Elisa Berritu, Odriozola, Mª Jesús Bustinduy, del Bosque Martín, Cristina, Echeverría, Tomás, Yarza, Alberto Eizaguirre, Fuentes, Ana, Goenaga, Miguel Ángel, del Río, Muskilda Goyeneche, Bauza, Ángela Granda, Iribarren, José Antonio, Urkola, Xabier Kortajarena, López, José Ignacio Pérez-Moreiras, Jiménez, Ainhoa Rengel, Reviejo, Karlos, Berbejillo, Alberto Sáez, Haza, Elou Sánchez, Alda, Rosa Sebastián, Ruiz, Itziar Solla, Ugartemendia, Irati Unamuno, Anza, Diego Vicente, Benito, Iñaki Villanueva, Arrieta, Mar Zabalo, Carrasco, Rafael, Climent, Vicente, Llamas, Patricio, Merino, Esperanza, Plazas, Joaquín, Reus, Sergio, Bouzas, Alberto, Castelo, Brais, Cuenca, José, Gutiérrez, Laura, Ramos, Lucía, Mayo, María Rodríguez, Serrano, Joaquín Manuel, Regueiro, Dolores Sousa, Martínez, Francisco Javier, del Mar Alonso, Mª, Castro, Beatriz, Melian, Teresa Delgado, Sarabia, Javier Fernández, Rosado, Dácil García, González, Julia González, Lacalzada, Juan, de la Peña, Lissete Lorenzo, Ramírez, Alina Pérez, Arrondo, Pablo Prada, Moreno, Fermín Rodríguez, Ciezar, Antonio Plata, Iglesias, José Mª Reguera, Álvarez, Víctor Asensi, Costas, Carlos, de la Hera, Jesús, Suárez, Jonnathan Fernández, Fraile, Lisardo Iglesias, Arguero, Víctor León, Menéndez, José López, Bajo, Pilar Mencia, Morales, Carlos, Torrico, Alfonso Moreno, Palomo, Carmen, Martínez, Begoña Paya, Esteban, Ángeles Rodríguez, García, Raquel Rodríguez, Asensio, Mauricio Telenti, Almela, Manuel, Ambrosioni, Juan, Azqueta, Manuel, Brunet, Mercè, Bodro, Marta, Cartañá, Ramón, Cuervo, Guillermo, Falces, Carlos, Fernández-Pittol, Mariana J, Fita, Guillermina, Fuster, David, de la Mària, Cristina García, García-Pares, Delia, Hernández-Meneses, Marta, Pérez, Jaume Llopis, Marco, Francesc, Miró, José M., Moreno, Asunción, Nicolás, David, Ninot, Salvador, Quintana, Eduardo, Paré, Carlos, Pereda, Daniel, Pericás, Juan M., Pomar, José L., Ramírez, José, Roque, Mercè, Rovira, Irene, Sandoval, Elena, Sitges, Marta, Soy, Dolors, Téllez, Adrián, Tolosana, José M., Vidal, Bárbara, Vila, Jordi, Adán, Iván, Alonso, David, Alonso, Juan Carlos, Álvarez-Uría, Ana, Bermejo, Javier, Bouza, Emilio, Caballero, Gregorio Cuerpo, Montero, Antonia Delgado, Estévez, Agustín, Ribas, Ramón Fortuny, Gargallo, Esther, Leoni, Mª Eugenia García, Mansilla, Ana González, Moraga, Francisco Javier González, Ramallo, Víctor González, Hernández, Martha Kestler, Hualde, Amaia Mari, Machado, Marina, Marín, Mercedes, Martínez-Sellés, Manuel, Melero, Rosa, Muñoz, Patricia, Monzón, Diego, Olmedo, María, Pedraz, Álvaro, Pinilla, Blanca, Pinto, Ángel, Rincón, Cristina, Rodríguez-Abella, Hugo, Rodríguez-Créixems, Marta, Sánchez-Pérez, Eduardo, Segado, Antonio, Toledo, Neera, Valerio, Maricela, Vázquez, Pilar, Moreno, Eduardo Verde, de la Villa, Sofía, Antorrena, Isabel, Loeches, Belén, Moreno, Mar, Ramírez, Ulises, Bastón, Verónica Rial, Romero, María, Rosillo, Sandra, Balbín, Jesús Agüero, Fernández, Cristina Amado, Castillo, Carlos Armiñanzas, de las Revillas, Francisco Arnaiz, Belaustegui, Manuel Cobo, Fariñas, María Carmen, Fariñas-Álvarez, Concepción, Sampedro, Marta Fernández, García, Iván, Rico, Claudia González, Gutiérrez-Fernández, Laura, Gutiérrez-Cuadra, Manuel, Díez, José Gutiérrez, Pajarón, Marcos, Parra, José Antonio, Teira, Ramón, Zarauza, Jesús, Parra, Jorge Calderón, Cobo, Marta, Domínguez, Fernando, Pavía, Pablo García, Cruz, Ana Fernández, Ramos-Martínez, Antonio, Romero, Isabel Sánchez, Centella, Tomasa, Hermida, José Manuel, Moya, José Luis, Martín-Dávila, Pilar, Navas, Enrique, Oliva, Enrique, del Río, Alejandro, Stuart, Jorge Rodríguez-Roda, Ruiz, Soledad, Tenorio, Carmen Hidalgo, Sequera, Sergio, Delia, Manuel Almendro, Araji, Omar, Barquero, José Miguel, Jambrina, Román Calvo, de Cueto, Marina, Acebal, Juan Gálvez, Méndez, Irene, Morales, Isabel, López-Cortés, Luis Eduardo, de Alarcón, Arístides, Gutiérrez-Carretero, Encarnación, Lepe, José Antonio, López-Haldón, José, Luque-Márquez, Rafael, Marín, Guillermo, Ortiz-Carrellán, Antonio, Sánchez-Domínguez, Eladio, Alonso, Luis Javier, Azcárate, Pedro, Gutiérrez, José Manuel Azcona, Blanco, José Ramón, Armas, Estíbaliz Corral, García-Álvarez, Lara, Oteo, José Antonio, Membrilla, Antonio Barros, Iglesias, Antonino Ginel, Grillo, Sara, Petracca, Rubén Leta, López-Contreras, Joaquín, Martínez, María Alba Rivera, Álvarez, M., Fernández, A.L., Martínez, Amparo, Prieto, A., Regueiro, Benito, Tijeira, E., Vega, Marino, Quiñonero, Amaia Aguirre, Miñambres, Ángela Alonso, Arana, Juan Carlos Gainzarain, de Alaiza Ortega, Sara González, Rodríguez, Miguel Ángel Morán, Rodríguez, Anai Moreno, de Zárate, Zuriñe Ortiz, Zapirain, José Joaquín Portu, de Adana Arroniz, Ester Sáez, Sánchez, Daisy Carolina Sorto, Antonio, Sánchez-Porto, Alejandro, Úbeda Iglesias, Leal, José Mª Arribas, Vázquez, Elisa García, Torres, Alicia Hernández, Blázquez, Ana, de la Morena Valenzuela, Gonzalo, Alonso, Ángel, Aramburu, Javier, Calvo, Felicitas Elena, Tarabini-Castellani, Paola, Gálvez, Eva Heredero, Bellido, Carolina Maicas, Pau, José Largo, Sepúlveda, Mª Antonia, Sierra, Pilar Toledano, Iqbal-Mirza, Sadaf Zafar, Alcolea, Eva Cascales, Yañez, Ivan Keituqwa, Martínez, Julián Navarro, Ballesta, Ana Peláez, Escobar, Eduardo Moreno, Monje, Alejandro Peña, Cabrera, Valme Sánchez, García, David Vinuesa, Asenjo, María Arrizabalaga, Luna, Carmen Cifuentes, Morcillo, Juana Núñez, Seco, Mª Cruz Pérez, Gelabert, Aroa Villoslada, Guallar, Carmen Aured, Abad, Nuria Fernández, Mangas, Pilar García, Adell, Marta Matamala, Ruiz, Mª Pilar Palacián, Porres, Juan Carlos, Vidal, Begoña Alcaraz, Del Amor Espín, María Jesús, Buendía, Francisco, Sánchez, Roberto Jiménez, Mármol, Rosario, Martínez, Francisco, Meseguer, Antonio, Pérez, Beatriz, Risco, Leticia, Saura, Zoser, Silva, Vanina, Villmarín, Mª Belén, Blanco, Mª Ángels Ribas, de Gopegui Bordes, Enrique Ruiz, Bonet, Laura Vidal, Borràs, Miquel Vives, Munera, Mª Carmen Bellón, Garaizabal, Elena Escribano, Martínez, Antonia Tercero, Luque, Juan Carlos Segura, Badía, Cristina, Palop, Lucía Boix, Xercavins, Mariona, Ibars, Sónia, Bosch, Xerach, Nebreda, Eloy Gómez, Herrera, Ibalia Horcajada, Gallego, Irene Menduiña, Pulido, Imanol, Santiago, Héctor Marrero, de Miguel Martínez, Isabel, Álamo, Elena Pisos, Sánchez, Daniel San Román, Pérez, Jorge Boan, Blanco, Eva Mª Aguilar, González, Mercedes Catalán, Peiretti, María Angélica Corres, Esteve, Andrea Eixerés, Pérez, Laura Domínguez, de Cossío Tejido, Santiago, Román, Francisco Galván, Robles, José Antonio García, Medrano, Francisco López, Gude, Mª Jesús López, Miguel, Mª Ángeles Orellana, Pilkington, Patrick, Ostalaza, Yolanda Revilla, Morales, Juan Ruiz, Solís, Sebastián Ruiz, Collado, Ana Sabín, Fernández, Marcos Sánchez, Rallo, Javier Solera, Martín, Jorge Solís, Escrihuela-Vidal, Francesc, Carratalà, Jordi, Grau, Inmaculada, Ardanuy, Carmen, Berbel, Dámaris, Salado, José Carlos Sánchez, Alegre, Oriol, Majoral, Alejandro Ruiz, Sbraga, Fabrizio, Blasco, Arnau, Sánchez, Laura Gracia, Sánchez-Rodríguez, Iván, Aldamiz, Gonzalo, Álvarez, Beatriz, Palacios, Marina Bernal, Úbeda, Alfonso Cabello, Roblas, Ricardo Fernández, Hernández, Rafael, Martín, Victoria Andrea Hortigüela, Kallmeyer, Andrea, Kancev, Cristina Landaeta, Martín, Marta, Ruiz, Miguel Morante, Lobato, Miguel Ángel Navas, Pello, Ana María, Prieto, Laura, Mallebrera, Marta Tomás, Varela, Laura, de la Peña Triguero, Mireia, Cerón, Ruth Esther Figueroa, Gómez, Lara Ruiz, Ble, Mireia, Gallego, Juan Pablo Horcajada, Ginel, Antonio José, López, Inmaculada, Mas, Alexandra, Mestres, Antoni, Molina, Lluís, Serrat, Ramón, Ribas, Núria, Sánchez, Francisca, Silverio, Ana, Suárez, Marina, Sorlí, Luisa, Recasens, Lluís, Taurón, Manuel, Regueras, María Fernández, Vallejo, María Ángeles Mantecón, Rivera, José Ángel Pérez, Mata, Nuria Sánchez, Cano, Antonia Calvo, Olivares, Miguel Fajardo, Núñez, María Victoria Millán, Sanz, Agustín Muñoz, Herrera-Hidalgo, Laura, Alonso-Menchén, David, Luque-Marquez, Rafael, Fariñas, María Del Carmen, Miró, Jose Maria, Goenaga, Miguel Angel, Angulo-Lara, Basilio, and Boix-Palop, Lucia

Published
2023
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20. Análisis de los datos del Registro Español de Cirugía Cardiaca (RECC) 2021-2022

Author

Montero-Cruces, Lourdes, Carnero-Alcázar, Manuel, Rodríguez-Lecocq, Rafael, Sureda-Barbosa, José C., Rodríguez-Roda-Stuart, Jorge, Legarra-Calderón, Juan J., Gracia-Baena, Juan M., Matamala-Adell, Marta, Pedraz-Prieto, Álvaro, Adsuar-Gómez, Alejandro, Gómez-Blasco, Félix, Valderrama-Marcos, José F., Arce-Ramos, Nuria, Martín-López, Carlos E., Urso, Stefano, García-Borges, Nora, Hernández-Campos, José A., Gascón-García-Verdugo, Pilar, and López-Menéndez, José

Published
2023
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23. Mid-infrared (3-8 {\mu}m) $\text{Ge}_{1-y}\text{Sn}_y$ alloys (0.15 < $y$ < 0.30): synthesis, structural, and optical properties

Author

Xu, Chi, Wallace, Patrick M., Ringwala, Dhruve A., Chang, Shery L. Y., Poweleit, Christian D., Kouvetakis, John, and Menéndez, José

Subjects
Condensed Matter - Materials Science
Abstract

$\text{Ge}_{1-y}\text{Sn}_y$ alloys with compositions in the 0.15 < $y$ < 0.30 range have been grown directly on Si substrates using a chemical vapor deposition approach that allows for growth temperatures as high as 290 $^{\circ}$C. The films show structural properties that are consistent with results from earlier materials with much lower Sn concentrations. These include the lattice parameter and the Ge-Ge Raman frequency, which are found to depend linearly on composition. The simplicity of the structures, directly grown on Si, makes it possible to carry out detailed optical studies. Sharp absorption edges are found, reaching 8 $\mu$m near $y$ =0.3. The compositional dependence of edge energies shows a cubic deviation from the standard quadratic alloy expression. The cubic term may dramatically impact the ability of the alloys to cover the long-wavelength (8-12 $\mu$m) mid-IR atmospheric window.

Published
2019
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27. Design and Development of an Assisted Ball Positioning System for Soccer Matches with an HBBTV Server Integrated to a Haptic TV Glove Accessible to Visually Impaired People

Author

Villamarín, Diego, Narváez, Andrés, Menéndez, José Manuel, Larco, Julio, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Abásolo, María J., editor, and Olmedo Cifuentes, Gonzalo F., editor

Published
2022
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28. Adaptive, Automatic and Non-invasive Cultural Heritage Preventive Conservation Framework Based on Visual Information Crowdsourcing

Author

Barbero-Álvarez, Miguel Antonio, Rodrigo, Juan Antonio, Menéndez, José Manuel, Celebi, Emre, Series Editor, Chen, Jingdong, Series Editor, Gopi, E. S., Series Editor, Neustein, Amy, Series Editor, Poor, H. Vincent, Series Editor, Liotta, Antonio, Series Editor, Di Mauro, Mario, Series Editor, Wang, Chua-Chin, editor, and Nallanathan, Arumugam, editor

Published
2022
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29. Criterios de ordenación temporal de las intervenciones quirúrgicas en patología cardiovascular y endovascular adquirida. Versión 2022

Author

Martín Gutiérrez, Elio, Castaño Ruiz, Mario, Hornero Sos, Fernando, Laguna Núñez, Gregorio, Barquero Aroca, José Miguel, Rodríguez-Roda Stuart, Jorge, Berastegui García, Elisabet, Cuerpo Caballero, Gregorio, Carnero Alcázar, Manuel, Dalmau Sorlí, María José, García Fuster, Rafael, Gutiérrez Carretero, Encarnación, Garrido Jiménez, José Manuel, Gualis Cardona, Javier, Bautista Hernández, Víctor, Sánchez Pérez, Raúl, López Menéndez, José, and Ortiz Berbel, Daniel

Published
2023
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34. What have we learned from the surveys of the AEC, AECP and the Observatory of Infection in Surgery? Compliance with postoperative infection prevention measures and comparison with the AEC recommendations

Author

Al-Raies Bolaño, Bader, Bravo-Brañas, Elena, Calderón Nájera, Ramón, Chamorro Pons, Manuel, Diez, Cecilia, Meijome, Xosé M., López Menéndez, José, Ocaña Guaita, Julia, Ortega Pérez, Gloria, Paredes Esteban, Rosa, Picardo, Antonio L., Sánchez Viguera, Cristina, Vilallonga, Ramón, Badia, Josep M., Amillo Zaragüeta, Mireia, Rubio-Pérez, Inés, Espin-Basany, Eloy, González Sánchez, Carmen, and Balibrea, José M.

Published
2022
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41. Cirugía cardiovascular y cardiología, situación actual en España de las dos especialidades hermanas: el estudio CARDIOXCARDIO

Author

Núñez-Gil, Iván J., primary, Rodríguez-Caulo, Emiliano A., additional, Dolores García-Cosío, M., additional, Piñón, Miguel, additional, Hoyo, Felipe Díez-Del, additional, Eixerés, Andrea, additional, Carrasco-Chinchilla, Fernando, additional, López-Menéndez, José, additional, Pérez-Villacastín, Julián, additional, and Rodríguez-Roda, Jorge, additional

Published
2024
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44. Sustitución valvular aórtica convencional aislada en España: tendencias nacionales de riesgo, tipo de prótesis y mortalidad entre 1998 y 2017

Author

Carnero-Alcázar, Manuel, Maroto-Castellanos, Luis Carlos, Hernández-Vaquero, Daniel, López-Menéndez, José, Hornero-Sos, Fernando, Silva-Guisasola, Jacobo, Cobiella-Carnicer, Javier, Pérez-Camargo, Daniel, Álvarez-de Arcaya, María Arantzatzu, Campelos-Fernández, Paula, and Elvira-Martínez, Carlos

Published
2021
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48. Vía clínica de recuperación intensificada en cirugía cardiaca. Documento de consenso de la Sociedad Española de Anestesiología, Reanimación y Terapéutica del Dolor (SEDAR), la Sociedad Española de Cirugía Cardiovascular y Endovascular (SECCE) y la Asociación Española de Perfusionistas (AEP)

Author

Margarit, Juan A., Pajares, María Azucena, García-Camacho, Carlos, Castaño-Ruiz, Mario, Gómez, María, García-Suárez, Jessica, Soto-Viudez, María José, López-Menéndez, José, Martín-Gutiérrez, Elio, Blanco-Morillo, Juan, Mateo, Eva, Hernández-Acuña, Carlos, Vives, Marc, Llorens, Rafael, Fernández-Cruz, Jesús, Acosta, Jesús, Pradas-Irún, Concepción, García, Mercedes, Aguilar-Blanco, Eva María, Castaño, Beatriz, López, Sara, Bel, Ana, Gabaldón, Tania, Fernández-López, Antonio R., Gutiérrez-Carretero, Encarnación, López-Forte, Cristina, Moreno, Joaquín, Galán, Josefa, Osseyran, Faisa, Bustamante-Munguira, J., Veiras, Sonia, and Vicente, Rosario

Published
2021
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49. Lipid biomarkers in high mountain lakes from the Cantabrian range (Northern Spain): Coupling the interplay between natural and anthropogenic drivers

Author

Ortiz Menéndez, José Eugenio, Sánchez Palencia, Yolanda, López Cilla, Ignacio, Morales Molino, César, Gardoki, Jon, Torres, Trinidad, Morellón Marteles, Mario, Ortiz Menéndez, José Eugenio, Sánchez Palencia, Yolanda, López Cilla, Ignacio, Morales Molino, César, Gardoki, Jon, Torres, Trinidad, and Morellón Marteles, Mario

Abstract

The lipid content of a high mountain lake (Lake Isoba) allowed the reconstruction of the paleoenvironmental changes and anthropic influence in Northern Spain during the last 550 years. Fatty acids (FAs) and n-alkan-2-ones indicate little degradation of OM. Three units were delimited. During Unit A (ca. 1460–1780 CE) high carbon preference index values, predominance of high-molecular-weight saturated FAs, and good correspondence between the predominant n-alkane and saturated FA chains indicate higher OM input and evidence of minimal degradation, linked to the cold and dry Little Ice Age, that favoured the OM input derived mainly from land plants, and the reduced bacterial activity. In Unit B (ca. 1780–2006 CE) the n-alkane and saturated FA profiles showed a remarkable mismatch suggestive of preferential microbial synthesis of long chain saturated FAs from primary OM and/or bacterial activity (predominance of low-molecular-weight saturated FAs but with a bimodal distribution), in coincidence with a decrease in OM input, which could be linked to the global warming that started in the second half of the 19th century. Although OM continued deriving mainly from terrigenous plants, aquatic macrophytes increased their contribution to the OM indicating the amelioration of environmental conditions. Evidence of considerable phytoplankton productivity and microbial activity was significant in Unit C (ca. 2006–2018 CE) coinciding with the highest concentrations of n-alkanes and saturated FAs, linked to warmer and drier conditions, and to greater anthropogenic influence. In addition, organic sulfur and gammacerane indicates loss of oligotrophy, and the record of faecal stanols, particularly that of 24-ethylcoprostanol, strongly evidences notable and rising water pollution associated with increasing cattle ranching in the lake catchment during the past 10–15 years., AEI/FEDER, UE, Agencia Estatal de Investigación, University of Bern, Ministerio de Universidades/Universidad de Alcalá/European Union, Gobierno del País Vasco, Depto. de Geodinámica, Estratigrafía y Paleontología, Fac. de Ciencias Geológicas, TRUE, pub

Published
2024

50. Model of Pleistocene geomorphological evolution in active Alpine neotectonics controlled margins in the western Mediterranean area: The case of SE Iberian Peninsula

Author

Torres, Trinidad, Ortiz Menéndez, José Eugenio, Mediavilla, Rosa, Santisteban Navarro, Juan Ignacio, Blázquez, Ana, Sierro, Francisco Javier, Sánchez-Palencia, Yolanda, ópez Cilla, Ignacio, Vega, Rogelio de la, Torres, Trinidad, Ortiz Menéndez, José Eugenio, Mediavilla, Rosa, Santisteban Navarro, Juan Ignacio, Blázquez, Ana, Sierro, Francisco Javier, Sánchez-Palencia, Yolanda, ópez Cilla, Ignacio, and Vega, Rogelio de la

Abstract

At the northern tip of the Betic realm (SE Iberian Peninsula), some troughs (synclines) and elevations (anticlines) alternate, marking the present-day coastal lobed morphology of cape-bounded bays, where subsidence and uplift conditions prevailed, respectively. In this study, we were able to establish a clear coastal evolution. To this end, we considered the sedimentological and palaeoenvironmental conditions, the palaeogeographical reconstruction, and recent tectonics until Middle Pleistocene times (MIS 5) through the interpretation of onshore cores, raised marine deposits and geophysical profiles. In this regard, as reflected by both onshore and offshore information, there seems to be a stratigraphical gap from the end of the Pliocene to MIS 15 (Middle Pleistocene). In areas under uplift conditions, linked to tardive Alpine tectonics, the deposits of ancient shorelines and raised beaches were located at different post-depositional elevations, which were dated from odd MIS 15 to MIS 5 using amino acid racemization. Only deposits aged MIS 7 and MIS 5 are roughly at the present-day sea level or some meters above. In the troughs, which remain mostly as lagoons and salt marshes, subsidence did not allow the sedimentary record to be discerned. However, many borehole cores were recovered, attesting lagoonal, marsh, sabkha, or alluvial environmental conditions, which were usually unconnected from the sea. Micropaleontological and amino acid racemization dating revealed these cores to be of MIS15 to MIS5 age. Offshore seismic research revealed five erosive-bounded deposits that are stacked accretionary prisms corresponding to highstands between odd MIS 15 and MIS 5. In contrast, even MISs can be correlated to the erosive horizons that separated the seismic units, reflecting lowstands. In this regard, some bars, at a range of distances from the present-day coastline, protected wetlands from marine influence, allowing the development of diverse sub-environments under changin, MCIN/AEI/10.13039/501100011033, Depto. de Geodinámica, Estratigrafía y Paleontología, Fac. de Ciencias Geológicas, TRUE, pub

Published
2024

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