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3.985  Articles
1 of 399 pages  |  10  records  |  more records»

In this study, the effect of calcination temperature and Si/Al mole ratio on acidity and physicochemical properties of silica SBA-15 were inves­tigated. Silica SBA-15 samples were calcined at 350, 450 and 550 °C, and then post-synthesis, the Al-grafting m... see more

The central role of teachers in enhancing education quality and promoting education reform has been largely acknowledged by various researchers. However, professional development (PD) in Iran is far from satisfactory. This paper initially outlines major s... see more

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Este artículo tiene por objetivo analizar el estado del rezago educativo en la educación básica de México, en el marco de tres declaraciones mundiales de la UNESCO -Jomtien 1990, Dakar 2000 e Incheon 2015-. La pregunta de investigación que guía a este est... see more

One of the main missions of the innocent imams is scientific, intellectual and cultural direction of the human society. Omayyad and Abbasids caliphs faced this barrier since the early days of their government against this guidance and they knew that they ... see more

La crisis sanitaria internacional ocasionada por el virus COVID-19, ha impactado la cotidianidad de diferentes dimensiones sociales, entre éstas lo educativo. En México, la contingencia sanitaria decretada por el Presidente derivó en una serie de medidas ... see more

The article describes Reza gold deposit of Ugur exploration area located in Geda- bek Ore District of the Lesser Caucasus in NW of Azerbaijan. It is established that main mineralization in the Reza gold deposit consists of hematite-barite-quartz-kaoline v... see more

El estudio del rezago en las carreras universitarias ha generado una vasta literatura tanto para describirlo como para recrear líneas de acción con miras a su transformación. Este trabajo tiene dos objetivos: 1) caracterizar el rezago en el Ciclo de Forma... see more

1 of 399 pages  |  10  records  |  more records»