Results 41 to 50 of about 20,666 (175)

Droughts and human impact in the ancient Uaymil region of the Maya lowlands inferred from a 2800‐year sedimentary archive at Lake Kaná, Mexico

Boreas, EarlyView.
The relationship between the climate and societal transformation in Maya lowlands has long been debated, particularly the role of drought in shaping the civilization trajectory during the Classic Period. A high‐resolution, multi‐proxy, geochemical record from Lake Kaná, located in the underexplored Uaymil region of the Yucatán Peninsula in Mexico ...
Haydar B. Martinez‐Dyrzo, Priyadarsi D. Roy, Benjamin Gwinneth, Irma G. Vargas‐Martinez, Alejandro A. Aragon‐Moreno, Roger Medina‐Gonzales   +5 more
wiley   +1 more source

Regium-π vs Cation-π Interactions in M2 and MCl (M = Cu, Ag and Au) Complexes with Small Aromatic Systems: An ab Initio Study

Inorganics, 2018
In this study we have theoretically analyzed (RI-MP2/def2-TZVP) the ability of metal moieties involving elements from group IB (Cu, Ag and Au) to establish either regium-π or cation-π interactions with π-systems of different electronic nature ...
Antonio Bauzá, Antonio Frontera
doaj   +1 more source

Geographic risks to functional groups of mammals and birds from habitat loss in Mexico

Conservation Biology, EarlyView.
Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás, Francisco Botello, Claudia E. Moreno, Griselda Escalona‐Segura, Víctor Sánchez‐Cordero   +4 more
wiley   +1 more source

Tetrel Bonding Interactions in Perchlorinated Cyclopenta- and Cyclohexatetrelanes: A Combined DFT and CSD Study

Molecules, 2018
In this manuscript, we combined DFT calculations (PBE0-D3/def2-TZVP level of theory) and a Cambridge Structural Database (CSD) survey to evaluate the ability of perchlorinated cyclopenta- and cyclohexatetrelanes in establishing tetrel bonding ...
Antonio Bauzá, Antonio Frontera
doaj   +1 more source

Contrasting Approaches in the Implementation of GRADE Methodology in Guidelines for Haemophilia and Von Willebrand Disease

Haemophilia, EarlyView.
ABSTRACT Introduction The 2024 ISTH clinical practice guideline (CPG) for treatment of congenital haemophilia, the NBDF‐McMaster Guideline on Care Models for Haemophilia Management, and ASH ISTH NBDF WFH guidelines on the diagnosis and management of VWD all utilised GRADE methodology.
Mark W. Skinner, Manuela Albisetti, Jesús Ardila, Jan Astermark, Jan Blatny, Manuel Carcao, Pratima Chowdary, Nathan T. Connell, Miguel Crato, Yesim Dargaud, Roseline d'Oiron, Amy L. Dunn, Miguel A. Escobar, Carmen Escuriola‐Ettingshausen, Emna Gouider, Annie Harroche, Cedric Hermans, Victor Jimenez‐Yuste, Radoslaw Kaczmarek, Gili Kenet, Liane Khoo, Robert Klamroth, Florian Langer, David Lillicrap, Johnny Mahlangu, Christoph Male, Tadashi Matsushita, Sandrine Meunier, Wolfgang Miesbach, Beatrice Nolan, Johannes Oldenburg, Brian O'Mahony, Margareth Ozelo, Glenn F. Pierce, Gloria Ramos, Michael Recht, Olivia Romero‐Lux, Dawn Rotellini, Rita C. Santoro, Tammuella C. Singleton, Alok Srivastava, Sophie Susen, Kate Talks, Huyen Tran, Leonard A. Valentino, Jerzy Windyga, Renchi Yang, Maria Elisa Mancuso, also on behalf of AICE, AHAD‐AP, AHCDC, ATHN, CLAHT, EHC, French CRH & MHEMO, HTCCNC, NBDF, PEDNET, UKHCDO, WFH   +59 more
wiley   +1 more source

Frontera [PDF]

, 2007
Se trata de concretar la definición del término 'frontera' desde el punto de vista del Derecho internacional, así como de determinar cuestiones conexas como la relativa a los distintos criterios de delimitación del territorio.
openaire   +3 more sources

Exploring drivers and costs of partial trans‐Saharan migration in juvenile vultures

Ibis, EarlyView.
Partial migration occurs when only a subset of individuals within a population undertakes a migratory journey. The decision to migrate can be influenced by intrinsic traits (e.g. sex or physical condition) as well as by extrinsic factors (e.g. social environment or resource availability).
Eneko Arrondo, Ana Sanz‐Aguilar, Andrea Santangeli, Manuel De La Riva, David Serrano, Ainara Cortés‐Avizanda, Olivier Duriez, Juan Manuel Pérez‐García, José Antonio Sanchez‐Zapata, Martina Carrete, Juan Oltra, Antoni Margalida, Pilar Oliva‐Vidal, Guillermo Blanco, Oscar Frías, Félix Martínez, José Luis González‐Del Barrio, José María Martínez, José Antonio Donázar   +18 more
wiley   +1 more source

Frontera, límites y espacios de confrontación en la América hispana durante el siglo XVIII.

Cuadernos de Historia de España, 2012
Este trabajo analiza el papel de la “frontera”, los límites y los espacios de confrontación desde una múltiple perspectiva, atendiendo al notable interés dedicado al tema por parte de la historiografía durante las últimas décadas.
Porfirio Sanz Camañes
doaj   +1 more source

Palaces for a New Spain Nobility: Between Creole Identity and Academicism

Sociology Lens, Volume 38, Issue 1, Page 75-86, March 2025.
ABSTRACT Mexico City and Havana had a significant number of noble palaces during the eighteenth century. Until now, the dearth of historical documentation on their construction has hampered any approximation, requiring other methodologies. Here, it is intended to establish how a new visual code was defined, consistent both with their local style and ...
Pedro Luengo
wiley   +1 more source

CONTATTO TRA ITALIANO E SPAGNOLO IN CONTESTO MIGRATORIO: IL RUOLO DEI SEGNALI DISCORSIVI

Italiano LinguaDue, 2022
Il presente lavoro propone un’indagine quali-quantitativa riguardante la funzione comunicativa dei segnali discorsivi (SD) presenti nel parlato di un gruppo italo-argentino di origine calabrese emigrato negli anni Cinquanta del secolo scorso.
Manuela Frontera, Emanuela Paone
doaj