Results 61 to 70 of about 251,875 (155)

Análisis de la situación en el área de los nuevos materiales [PDF]

, 1987
En el presente artículo se realiza un breve estudio de la situación de los nuevos materiales, analizando, primero, qué bloques componen este campo. Se pasa revista a los metales, a las cerámicas, a los plásticos y a los materiales compuestos, concluyendo
Martín Pereda, José Antonio
core   +1 more source

Reactivity of Square Planar Pt(II) Complexes Toward Acidic Moieties as H+, M+, and [ML]+ (M = Ag, Au)

Chemistry – A European Journal, Volume 31, Issue 59, October 22, 2025.
Despite the fact that Pt(II) in square‐planar complexes exhibits Lewis basic properties toward electrophilic species (E⁺), the presence of oxygen atoms acting as competing Lewis basic sites leads to the formation of Pt─O─E⁺─O─Pt or Pt─O─E⁺ type complexes, in which no direct metal–metal bonds are observed.
Laura Martínez‐Romera, David Campillo, Daniel Escudero, Miguel Baya, Antonio Martín   +4 more
wiley   +1 more source

Reglas electrónicas como criterio de predicción de compuestos ternarios con coordinación tetraédrica [PDF]

, 2019
Los materiales con coordinación tetraédrica se pueden describir apropiadamente mediante dos ecuaciones que permiten establecer para cada compuesto, dos fónnulas restrictivas, una de ellas de carácter covalente y la otra, de carácter iónico.
Garín C., Jorge L.
core   +1 more source

Foliar spectral signatures reveal adaptive divergence in live oaks (Quercus section Virentes) across species and environmental niches

New Phytologist, Volume 248, Issue 1, Page 370-388, October 2025.
Summary Genomic tools have advanced our understanding of species and population structure, but distinguishing neutral from adaptive evolution remains challenging due to limited methods for measuring a broad spectrum of phenotypic traits. We used spectroscopic data from preserved leaves to test for adaptive divergence among populations of live oaks ...
Mariana S. Hernández‐Leal, J. Antonio Guzmán Q., Antonio González‐Rodríguez, Jeannine Cavender‐Bares   +3 more
wiley   +1 more source

Pilot-scale production of functionalized nanoclays for sustainable agricultural applications: process scale-up and optimization

Discover Chemical Engineering
This study presents the pilot-scale development of environmentally friendly agro-inputs based on natural bentonite functionalized with chitosan (Q) and salicylic acid (SA), based on successful previous laboratory-scale formulations.
Tomás Giannandrea, Jeremías Benjamin, Andres Torres Nicolini, Vera Alejandra Alvarez, Andrea Yamila Mansilla, Romina Paola Ollier Primiano   +5 more
doaj   +1 more source

Advances in Ligand‐Driven Pd‐Catalyzed C─H Functionalizations: Recent Insights and Updates

ChemCatChem, Volume 17, Issue 15, August 7, 2025.
The most significant advances in ligand‐driven Pd‐catalyzed organic synthesis over the past two years are presented. Processes involving C─H activation of substrates, avoiding their prefunctionalization are illustrated. Both the activity and selectivity of the catalyst depend on the design of the ligands (pyridones, pyridines, amino acids, phosphines ...
Jesús Moradell, Cosmina Bohan, Alexandra Pop, Esteban P. Urriolabeitia   +3 more
wiley   +1 more source

Diseño y ejecución de refuerzos de estructuras de hormigón aplicando laminados compuestos [PDF]

, 2007
La aplicación de laminados compuestos en el refuerzo de estructuras de hormigón, metálicas, de madera, de mampostería, etc. comienza a constituir, en el momento presente, una auténtica alternativa al sistema de refuerzo convencional mediante encolado ...
Pons Gabarrón, Jordi
core  

Surfing the Color Map with Carbazole‐Appended Cyclometalated N‐Heterocyclic Carbene Pt Complexes and Their Application in Green Organic Light‐Emitting Devices

Advanced Optical Materials, Volume 13, Issue 20, July 11, 2025.
Complexes [PtII(Cbz‐C^C*bzim/im)(L^L)], bearing carbazole‐appended cyclometalated NHCs, show bright phosphorescence, peaking from the blue to the yellowish–green spectral range depending on the carbene, L^L, and doping concentration. Non‐doped OLEDs using 1A or 3A (L^L = acac or P^O2) reach the best performances (Von: 2.99 V, 2.55 V; Lmax: 39208, 25837 
Jorge Roy, Michele Forzatti, Antonio Martín, Irene Ara, Edoardo Stanzani, Sandra Jenatsch, Henk J. Bolink, Sara Fuertes, Daniel Tordera, Violeta Sicilia   +9 more
wiley   +1 more source

FIQUE FIBER AN ALTERNATIVE FOR REINFORCED PLASTICS. INFLUENCE OF SURFACE MODIFICATION

Biotecnología en el Sector Agropecuario y Agroindustrial, 2014
In this paper are studied the physicochemical, mechanical and thermal properties of the natural fique fibers, that can be used as reinforcement of polymeric matrices.
MARIO FERNANDO MUÑOZ VELEZ, MIGUEL ANGEL HIDALGO SALAZA R, JOSE HERMINSUL MINA HERNANDEZ   +2 more
doaj  

Análisis de los transitorios de ruido electroquímico para aceros inoxidables 316 Y – DUPLEX 2205 en NaCl Y FeCl

Revista de Metalurgia, 2012
En este trabajo se muestran los resultados obtenidos de las mediciones de ruido electroquímico para diferentes materiales que exhiben corrosión por picaduras.
F. Almeraya-Calderón, F. Estupiñán, P. Zambrano R, A. Martínez-Villafañe, A. Borunda T, R. Colás O, C. Gaona-Tiburcio   +6 more
doaj   +1 more source