Results 21 to 30 of about 1,019 (115)

Biobased Polyurethane Films Based on Andiroba (Carapa guianensis) and Buriti (Mauritia flexuosa) Oil Polyols

Journal of Applied Polymer Science, Volume 143, Issue 30, August 10, 2026.
Polyurethane films were prepared from andiroba (Carapa guianensis) and buriti (Mauritia flexuosa) oil‐derived polyols, emphasizing their potential as bio‐based materials. UV–Vis analysis indicates the retention of carotenoid‐related chromophoric features within the polymer matrix.
João A. P. da Silva, Amanda L. Ferreira, Felipe F. C. Tavares, Chana M. da Silva, Cesar L. Petzhold, Nilo S. M. Cardozo   +5 more
wiley   +1 more source

El Instituto Luis Vives. Colegio Español de México

Revista Española de Pedagogía
El éxodo republicano de 1939 tuvo una dimensión familiar y significó la expatriación de numerosos profesores de español. A fin de crear lugares de trabajo para esos docentes y facilitar la educación de las familias expatriadas, el SERE fundó en 1939 el ...
José Ignacio Cruz
doaj   +1 more source

Caravana de migrantes en México: nueva forma de autodefensa y transmigración

Revista CIDOB d'Afers Internacionals, 2019
Este artículo presenta los avances de una investigación en curso sobre las caravanas de migrantes en América del Norte o los éxodos de desplazados centroamericanos –que tienen lugar desde 2011, pero que se intensificaron a partir 2018–, los cuales ...
Amarela Varela Huerta
doaj   +1 more source

Efficient Solketal Synthesis via Acetalization Using Sulfonated Carbon From Lavender Leaf Waste After Essential Oil Extraction

Chemistry &Biodiversity, Volume 23, Issue 8, August 2026.
Sulfonated carbon catalysts were synthesized from lavender leaf waste after essential oil extraction via hydrothermal carbonization (HTC). Under mild, low‐energy conditions, the catalyst achieved 97% glycerol conversion and 98% solketal selectivity. This approach valorizes agricultural residues and crude glycerol from biodiesel production, contributing
Julianne A. Bruno, Guilherme R. Pereira, Kelly R. Francisco, Gabriel H. M. de O. Pinto, Eraldo Lima, Ulisses A. Pereira, Garbas A. dos S. Junior, Patrícia F. Pinheiro   +7 more
wiley   +1 more source

Refugiados y evacuados de la provincia de Toledo al comienzo de la guerra civil (1936)

Espacio, Tiempo y Forma. Serie V, Historia Contemporánea, 2009
Desde el comienzo de la guerra civil tuvieron lugar movimientos forzosos de población al compás del avance de los frentes. Como ya sucedió en Andalucía y Extremadura, las sucesivas derrotas del ejército republicano en las comarcas septentrionales de la ...
Juan Carlos Collado
doaj   +1 more source

Green Synthesis of Silver Nanoparticles Using Root Extract of Gomphrena vaga Mart.: Metabolomic Insights Into Nanoparticle Formation and Antimicrobial Activity

Nano Select, Volume 7, Issue 8, August 2026.
This study presents the green synthesis of ultrasmall silver nanoparticles using Gomphrena vaga Mart. root extract. The nanoparticles synthesized were stable and showed good broad‐spectrum antibacterial activity against Gram‐positive and Gram‐negative bacteria in initial studies.
Uedson da Silva das Neves, Thyerre Santana da Costa, Symone Costa de Castro, Maelson Cardoso Lacerda, Mauro Alves Bueno, Ljubica Tasic   +5 more
wiley   +1 more source

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

Advanced Engineering Materials, Volume 28, Issue 13, 8 July 2026.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo, Daniela Winsley Valereto Friozi, Vinícius de Oliveira, Marcia Cristina Branciforti   +3 more
wiley   +1 more source

Nuevos patrones de exilio en Guatemala y Nicaragua

Sortuz
En el artículo se considera el éxodo de personas periodistas y comunicadoras, operadoras de justicia y defensoras de derechos humanos, que actualmente se está presentando desde Guatemala y Nicaragua.
Eva Leticia Orduña Trujillo
doaj   +1 more source

Comparing the Effects of Chemical Optical Clearing Agents and Mechanical Compression on the Optical Attenuation of Porcine Skin

Journal of Biophotonics, Volume 19, Issue 7, July 2026.
Quantitative SD‐OCT analysis reveals that topically applied chemical optical clearing agents, specifically PEG‐400 combined with oleic acid and aqueous tartrazine, significantly reduce the skin optical attenuation coefficient. In contrast, mechanical compression proved ineffective, identifying chemical clearing as a superior strategy for optimizing ...
Camila Ramos Silva, Tania Mateus Yoshimura, Jailda Nonato dos Santos Oliveira, Marcus Paulo Raele, Marcos Antonio Hortellani, Martha Simões Ribeiro, Denise Maria Zezell, Marcello Magri Amaral   +7 more
wiley   +1 more source

Da Gama, Cary Grant and the Election of 1934 de Charles Reis Felix: o êxodo português na costa leste americana

Forma Breve, 2016
Ao contrário do que acontece na Bíblia, onde “a Páscoa” ocupa a maior parte da narração, na coleção de histórias Da Gama, Cary Grant and the Election of 1934, Charles Felix Reis trata cuidadosamente da instalação de vários “povos” num país novo.
Erik Van Achter
doaj   +1 more source