Results 51 to 60 of about 8,593,805 (113)

A Family of Symmetrical and Unsymmetrical Aza‐Dipyrromethenes and Aza‐BODIPYs with Through‐Bond and Face‐To‐Face π‐Interaction between Termini

Chemistry – A European Journal, Volume 31, Issue 50, September 5, 2025.
The reported aza‐dibenzodiprromethenes present a rare helical architecture, placing terminal aryl groups in a close, π‐stacked arrangement. Differentially terminated derivatives are prepared by statistical condensation or controlled synthesis via conversion of one partner to its tosylate or triflate.
Budur N. Alanazi, Ahad O. Alsahli, Sonia Remiro‐Buenamañana, Alejandro Díaz‐Moscoso, Faeza H. Alkorbi, Norah A. Alsaiari, Conor Marrett‐Munro, Isabelle Chambrier, David L. Hughes, Simon J. Coles, Graham J. Tizzard, Andrew N. Cammidge   +11 more
wiley   +1 more source

Reconocimiento de procesos matemáticos en alumnos de primer curso de Bachillerato [PDF]

, 2003
En este artículo, que es el segundo de una trilogía en la que se da cuenta de una investigación sobre los aspectos cognitivos del aprendizaje de la demostración matemática, se presenta un estudio sobre el reconocimiento de diferentes procesos matemáticos
Ibañes, Marcelino J., Ortega del Rincón, Tomás   +1 more
core   +3 more sources

Plasmonic Polymorphs by Combining Shape Anisotropy and Soft Interactions in Bipyramid Thin Films

Small, Volume 21, Issue 31, August 7, 2025.
The interplay of soft ligand coatings and anisotropy leads to structural diversity in superstructures of pentagonal gold nanobipyramids (AuBP). The correlated analysis of structure and optical properties with high‐resolution transmission electron microscopy (HR‐TEM), scanning transmission electron microscopy electron energy loss spectroscopy (STEM‐EELS)
Jules Marcone, Sabrina Juergensen, Juan Barrios‐Capuchino, Xiaoyian Li, Claire Goldmann, Andrea Köppen, Winnie Pfeiffer, Felix Lehmkühler, Wolfgang J. Parak, Mathieu Kociak, Marianne Impéror‐Clerc, Stephanie Reich, Cyrille Hamon, Florian Schulz   +13 more
wiley   +1 more source

Are we going on playing when talking about Experimental Archaeology? [PDF]

, 2018
En esta contribución realizamos una reflexión a fecha de hoy sobre el valor y significado que en la actualidad tiene la experimentación dentro de la Arqueología como herramienta de investigación. Desde nuestra disciplina la Arqueología Experimental se ha
Baena Preysler, Javier, Palomo, Antoni, Torres Navas, Concepción   +2 more
core   +3 more sources

Shining Bright at 960 nm: A 28‐Silver‐Atom Nanorod Stabilized by DNA

Small Structures, Volume 6, Issue 8, August 2025.
Single‐crystal X‐ray data reveal the structure of a 28‐silver‐atom cluster wrapped within two DNA oligomers. In the crystalline state, two chlorido ligands are detected, which are absent in the mass spectrometry data of the solution state. With 12 valence electrons, the silver cluster has an absorption band situated at 835 nm and an emission peaking at
Giacomo Romolini, Hiroki Kanazawa, Christian Brinch Mollerup, Mikkel Baldtzer Liisberg, Simon Wentzel Lind, Zhiyu Huang, Cecilia Cerretani, Jiro Kondo, Tom Vosch   +8 more
wiley   +1 more source

Las funciones de la demostración en el aula de matemática [PDF]

, 2005
Este trabajo forma parte de una investigación que pretende analizar la concepción que tienen los docentes de la noción de demostración dentro de la matemática y la influencia en sus prácticas.
Crespo, Cecilia, Ponteville, Christiane Cynthia   +1 more
core  

Lipid Metabolism and Immune Function: Chemical Tools for Insights into T‐Cell Biology

ChemBioChem, Volume 26, Issue 11, June 3, 2025.
This review explores how lipids regulate immune responses, particularly in T‐cell function. Advances in metabolomics and proteomics provide insights into lipid‐mediated immunity. Fluorescent lipids enable single‐cell analysis of lipid uptake and metabolism.
Luuk Reinalda, Mario van der Stelt, Sander Izaak van Kasteren   +2 more
wiley   +1 more source

Demostraciones experimentales para sobre la caída libre

, 2010
ESP
Alonso Sánchez, Manuel, Aracil Belmonte, Ana Isabel, Martínez Ferrándiz, Asier, Ortega Martínez, María, Rodríguez Ávila, Antonio   +4 more
openaire   +1 more source

ESTRATEGIAS DE ENSEÑANZA-APRENDIZAJE Y EL USO DE MATERIAL DIDACTICO PARA EL DESARROLLO DEL CONTENIDO EL BENCENO EN DECIMO GRADO DE LA DISCIPLINA DE QUIMICA DEL INSTITUTO PUBLICO DE NINDIRI EN EL AÑO 2014 [PDF]

, 2014
La presente investigación surge por la problemática que se observó en la clase de química, con estudiantes del décimo grado, quienes en el desarrollo del contenido el benceno, se detectó: Poco interés de aprendizaje en los estudiantes.
Gaitán Balladares, Josué Daniel, López Nicaragua, Santiago Manuel   +1 more
core  

Increasing acidification does not affect sexual reproduction of a solitary zooxanthellate coral transplanted at a carbon dioxide vent

Limnology and Oceanography, Volume 70, Issue 6, Page 1666-1677, June 2025.
Abstract The absorption of atmospheric carbon dioxide is causing significant changes to the carbonate chemistry of the ocean, in a phenomenon called ocean acidification. The latter makes it potentially more difficult for marine calcifiers like corals, to build their calcium carbonate structures, thus affecting their ability to survive and reproduce ...
Chiara Marchini, Fiorella Prada, Erik Caroselli, Francesca Gizzi, Valentina Airi, Dragana Paleček, Ilaria Zuccaro Destefani, Arianna Mancuso, Umberto Valdrè, Giuseppe Falini, Zvy Dubinsky, Stefano Goffredo   +11 more
wiley   +1 more source