Resultados de búsqueda - ((teste OR ester) OR (est OR ((estos OR (estos OR tesis)) OR (testos OR estaees)))) point

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    Efficiency Evaluation on the Influence of Washing Methods for Biodiesel Produced from High Free Fatty Acid Waste Vegetable Oils through Selected Quality Parameters por Ortiz Lechuga, Eugenia Guadalupe, Rodríguez Zúñiga, Mauro, Arévalo Niño, Katiushka

    Publicado 2020
    “…We selected seven quality tests: pH determination, cloud, pour and flash point, acid number (AN), water/sediments and soap content considering the most commonly failed checkpoints in biodiesel production. …”
    Enlace del recurso
    Artículo
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    Emociones percibidas por los clientes en los encuentros de los servicios para garantizar la lealtad en una relación a largo plazo: Revisión teórica preliminar (Emotions perceived... por Garza, Israel

    Publicado 2016
    “…It is at this point where research has emphasis. Resumen: La lealtad sigue siendo uno de los principales temas y preocupaciones para los investigadores y practicantes. …”
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    Artículo
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    Data on the removal of metals (Cr, Cr, Cd, Cu, Ni, Zn) from aqueous solution by adsorption using magnetite particles from electrochemical synthesis por Manrique, Julio Jorge, Marriaga Cabrales, Nilson, Hernández Ramírez, Aracely, Machuca Martínez, Fiderman

    Publicado 2019
    “…Magnetite particles were prepared by electrolytic synthesis (average crystallite size 37.9±1.2nm, surface area ¼ 17.2 m2g1, isoelectric point ¼ 6.3, magnetic saturation ¼ 62 emu g1) and used as adsorbent of heavy metals in aqueous solutions. …”
    Enlace del recurso
    Artículo
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    Metodologías para la Evaluación de Activos Intangibles por Palomo González, Miguel Ángel

    Publicado 2005
    “…Their presentation and amount in the enterprise’s balance sheet is the starting point in a management process for intangible assets which continue with the value generation and improvement in future periods. …”
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    Artículo
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    Desarrollo histórico de la educación a distancia (Historical development of distance education) por Jardines Garza, Francisco Javier

    Publicado 2009
    “…In this paper we describe the historical development in distance education from a general point of view. We resume the historical evolution of internet, and its relationship with important social issues as communication, defense, and education. …”
    Enlace del recurso
    Artículo
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    Thermomechanical Performance of fr-4 Laminates in the Manufacturing Process of Printed Circuit Boards. por Rodríguez Vázquez, Carlos Alfonso

    Publicado 2016
    “…In 2006 the Restriction of Hazardous Substances (RoHS) prohibited the use of lead (Pb) in solder paste, which has a melting temperature around 180oC, whereas lead-free solder pastes have a melting point around 230oC, 30oC-40oC higher than Pb solder paste, this has generated PCB thermo mechanical problems due to the temperature increase at which the material is exposed. …”
    Enlace del recurso
    Tesis
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    Thermomechanical Performance of fr-4 Laminates in the Manufacturing Process of Printed Circuit Boards. por Rodríguez Vázquez, Carlos Alfonso

    Publicado 2016
    “…In 2006 the Restriction of Hazardous Substances (RoHS) prohibited the use of lead (Pb) in solder paste, which has a melting temperature around 180oC, whereas lead-free solder pastes have a melting point around 230oC, 30oC-40oC higher than Pb solder paste, this has generated PCB thermo mechanical problems due to the temperature increase at which the material is exposed. …”
    Enlace del recurso
    Tesis

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