Results 61 to 70 of about 15,364 (166)

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

Materials Research Express, 2020
In the industry, sodium carbonate is used to prepare sodium silicate; however, this process generates great volumes of CO _2 . In this work, sodium hydroxide has been proposed to prepare sodium silicate using natural sand. Two experimental variables were
A L Lázaro, Francisco J Rodríguez-Valadez, J J Machorro López, F Espejel-Ayala   +3 more
doaj   +1 more source

Auxin response and PIN‐mediated transport in chlorophyte algae

Journal of Integrative Plant Biology, EarlyView.
Like multicellular plants, green algae respond to auxin and move it across their cells. However, their PIN‐like proteins do not act like plant auxin exporters, suggesting that basic auxin transport evolved early and specialized directional transport appeared later in plant evolution.
Adrijana Smoljan, Sarah Koutnik‐Abele, Dmitrii Vladimirtsev, Petr Klíma, Anita Bírošíková, Yuzhou Zhang, Jack Merrin, Maximilian Schuster, Katarina Kurtović, Ulrich Z. Hammes, Jan Petrášek, Jiří Friml   +11 more
wiley   +1 more source

Identificación de las variables que influyen en el origen de los puntos de congestión de tráfico

Revista Facultad de Ingeniería Universidad de Antioquia
La identificación de las variables que generan puntos de congestión vehicular en las ciudades se ha revelado como una tarea extraordinariamente compleja, que implica actividades de caracterización, predicción y proyección de los puntos de congestión ...
Ernesto De la Cruz Nicolás, Hugo Estrada-Esquivel, Alicia Martínez-Rebollar, Eddie Helbert Clemente-Torres, Odette Alejandra Pliego-Martínez   +4 more
doaj   +1 more source

Voting Red Again: How Social Capital and Local Change Drove the Trump Swing

Journal of Regional Science, EarlyView.
ABSTRACT Social capital has long been regarded as a bulwark of democratic life. Yet in the United States—as across much of the democratic world—some of the communities with the densest social ties have proved the most receptive to antisystem politics.
Pedro Fierro, Andrés Rodríguez‐Pose, Francisco Rowe, Ellen Johanna Helsper   +3 more
wiley   +1 more source

Photoprotective potential of gadusol against ultraviolet B radiation in melanocytes

Photochemistry and Photobiology, EarlyView.
Gadusol protects melanocytes from ultraviolet B (UVB)‐induced damage without cytotoxicity. Abstract The increasing incidence of skin cancer, including melanoma, combined with the need for ultraviolet (UV) filters that are safe for human health and marine ecosystems, is driving the search for new photoprotective agents.
Andressa Mai Matsumoto, Rocío Isla Naveira, Andy Joel Taipe Huisa, Marcelo Augusto Germani Marinho, Lais Zortéa, José María Monserrat, Agueda Elena Massa, María Sandra Churio, Ana Paula de Souza Votto   +8 more
wiley   +1 more source

Sclerophyllous structural and chemical traits of mite‐induced galls on Crinodendron patagua (Elaeocarpaceae) leaves

Plant Biology, EarlyView.
Eriophyid mites reprogram the structural and biochemical traits of sclerophyllous leaves in Crinodendron patagua, promoting the formation of nutrient‐rich and protective gall tissues. Abstract Sclerophyllous plants present a suite of traits, including small, leathery leaves with thick cuticles, dense trichomes and sclerified tissues, which are often ...
L. M. Guedes, L. Rodríguez‐Cerda, N. Aguilera, E. Grandón, F. R. Valeriano, J. F. de Lima, J. F. P. de Oliveira, B. G. Ferreira   +7 more
wiley   +1 more source

Satisfaction of the students in a preparatory course of mathematics in e-modalities

Apertura, 2018
The aim of this work was to analyze student satisfaction with a preparatory course in advanced mathematics, in e-learning and b-learning modalities, in a master's degree in electronics, in a graduate institution of the National Technological of Mexico ...
Carolina Hernández Gutiérrez, Manuel Juárez Pacheco   +1 more
doaj   +1 more source

Bark‐associated yeasts and their potential role as tree carbon sink at the treeline of the southern Andes

Plant Biology, EarlyView.
In the southern Andes, Nothofagus pumilio shows elevational decreases in the concentrations of carbon reserves which are the food of bark‐associated yeasts, suggesting that competition for carbohydrates between tree growth and bark‐associated yeasts may cause carbon shortages.
F. I. Piper, C. Oporto, C. Reyes‐Bahamonde, P. Moreno‐Meynard, R. F. Nespolo, L. Saona, F. A. Cubillos, A. Fajardo   +7 more
wiley   +1 more source

Galectin‐3 plasma levels are associated with left atrial contractile function in long‐distance runners

Experimental Physiology, EarlyView.
Abstract High‐intensity endurance exercise induces myocardial remodelling as an adaptive response to sustained volume overload, but excessive cumulative training might also favour deleterious cardiac remodelling, including atrial fibrosis. Whether acute marathon running engages circulating fibrosis‐related biomarkers and whether these biomarkers track ...
Felipe Contreras‐Briceño, Fernanda Sanhueza‐Olivares, Rodrigo Fernández, Silvana Llevaneras, Pablo F. Castro, Luigi Gabrielli, Mario Chiong   +6 more
wiley   +1 more source

Los inhibidores de corrosión

Revista de Metalurgia, 2003
En este trabajo, se describe el fenómeno de la degradación por corrosión electroquímica de los metales, sus efectos y costos, así como algunas de las técnicas empleadas para minimizar su impacto. Se hace énfasis en la descripción y mecanismo de acción de
L. A. Godínez, Y. Meas, R. Ortega-Borges, A. Corona   +3 more
doaj   +1 more source