Resultados de búsqueda - (((usumy OR sum) OR (((sume OR asume) OR some) OR ausume)) OR sumoa)*

  1. 681

    Bromate and chromate removal from water by double layered hydroxides por Villanueva Rangel, Cecilia Patricia

    Publicado 2015
    “…To remove bromate and chromate from water, common methods include ion exchange, coagulation-flocculation processes, reductionprecipitation, etc., but these strategies can present some important disadvantages like incomplete removal, high cost, continuous use of reagents, and high energy costs. …”
    Enlace del recurso
    Tesis
  2. 682
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  11. 691
  12. 692
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  14. 694
  15. 695

    Desarrollo de un cuestionario para evaluar las actitudes y percepciones de docentes de educación secundaria en relación con las actividades experimentales por Guerra Ramos, María Teresa, García Horta, José Baltazar, López Valentín, Dulce María

    Publicado 2017
    “…Teachers’ responses suggest good predisposition and benevolent attitudes in general; however these contrast with some teachers, reluctance to conduct practical work, lack of confidence and sense of control. …”
    Enlace del recurso
    Artículo
  16. 696

    Niñez en riesgo y la agenda del desarrollo: Una reflexión sobre el trabajo infantil. por Martínez Chapa, Oshiel Martínez Chapa, Martínez Chapa, Olga Lidia, Salazar Castillo, Jorge E

    Publicado 2017
    “…The study adopts type socio-economic perspectives and is located in the context of international and national law as is essential to the protection of this important group of society. It presents some aspects of this problem at the international and national levels. …”
    Enlace del recurso
    Artículo
  17. 697
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  20. 700

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