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  1. 141
  2. 142

    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
  3. 143

    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
  4. 144
  5. 145

    DISEÑO Y VALIDACIÓN DE UNA ESCALA DE APRENDIZAJE SOBRE SALUD COLECTIVA EN ENFERMERÍA por García Piña, Eunice Victoria

    Publicado 2017
    “…Results: An instrument of 40 items was obtained, which considers five dimensions of learning: genuine (8 to 40 points), meaningful, and reflective (7 to 35 points), experimental -multidimensional (9 to 45 points), self-employed (6 to 30points) and set (10 to 50 points), derivative in a total a score of 40 to 200 points. …”
    Enlace del recurso
    Artículo
  6. 146

    Análisis de las motivaciones, factores de éxito y obstáculos al espíritu empresarial: estudio comparativo entre México, EEUU y Turquía (Analysis of motivations, factors of success... por Partida Puente, Abel, Carrera Sánchez, María Margarita, Villarreal Villarreal, Luis Alberto

    Publicado 2012
    “…These authors proposed to considerate the entrepreneur process as functions, activities and actions associated with the perception of opportunity and the creations of the organization to take advantage of. As beginning point, Gartner (1985) proposed to considerate the essential elements of the entrepreneur study: a) the environment b) the characteristics of the individual, c) the process and d) the Organization created. …”
    Enlace del recurso
    Artículo
  7. 147

    Distribución espacial de los vectores de las enfermedades re emergentes (chagas, paludismo y dengue) en el estado de Jalisco, México. por Magallón Gastélum, Ezequiel

    Publicado 2018
    “…A multidisciplinary analytical cross-sectional study, with stratified probabilistic sampling, divided into two aspects: a) Study to estimate point prevalence of the diseases indicated in the open population as well as the spatial distribution of the vectors that transmit these diseases and b) Intentional study in patients Febrile to determine the frequency of these diseases in their active phase. …”
    Enlace del recurso
    Tesis
  8. 148

    Distribución espacial de los vectores de las enfermedades re emergentes (chagas, paludismo y dengue) en el estado de Jalisco, México. por Magallón Gastélum, Ezequiel

    Publicado 2018
    “…A multidisciplinary analytical cross-sectional study, with stratified probabilistic sampling, divided into two aspects: a) Study to estimate point prevalence of the diseases indicated in the open population as well as the spatial distribution of the vectors that transmit these diseases and b) Intentional study in patients Febrile to determine the frequency of these diseases in their active phase. …”
    Enlace del recurso
    Tesis
  9. 149
  10. 150
  11. 151
  12. 152

    Proporción de resultados del FMS™ entre distintas disciplinas deportivas en atletas universitarios por González Fimbres, Roberto Andrés, Griego Amaya, Héctor, Porras Hoyos, Alba Antonieta

    Publicado 2015
    “…There are three possible scores criteria for the FMS™, above 14 points means low injury risk, 14 points or less means high injury risk, or the subject feels pain/injured during screening process. …”
    Enlace del recurso
    Artículo
  13. 153
  14. 154

    Caracterización electroquímica de la pasivación de acero inoxidable empleado en la fabricación de fuselajes de helicópteros. por Lara Banda, María del Refugio

    Publicado 2018
    “…In general when talking about this type of helicopter, investigations are carried out with the first point to consider the safety of those who operate it, together with the factors to which it will be exposed, among which we can mention: environmental conditions, weight and resistance to corrosion, among others. …”
    Enlace del recurso
    Tesis
  15. 155

    Caracterización electroquímica de la pasivación de acero inoxidable empleado en la fabricación de fuselajes de helicópteros. por Lara Banda, María del Refugio

    Publicado 2018
    “…In general when talking about this type of helicopter, investigations are carried out with the first point to consider the safety of those who operate it, together with the factors to which it will be exposed, among which we can mention: environmental conditions, weight and resistance to corrosion, among others. …”
    Enlace del recurso
    Tesis
  16. 156

    Evaluación de carbono en ecosistemas terrestres en Tizimín, Yucatán, México por García García, Dora Alicia

    Publicado 2019
    “…The sampling was carried out according to the cardinal points (N, S, E, W). The twigs were separated to place them in paper bags with a capacity of 3 kg, identify them with a code and they will be processed in the weight of each of them, 3 subsamples of each tree will be obtained the answers of the Carbon Laboratories, Technology Laboratory of the Wood and Laboratory of Chemistry of the Faculty of Forestry Sciences of the Autonomous University of Nuevo Leon, where the samples are at a temperature of 75 ° C in a digital drying oven brand Riossa model HCF-102-D for 72 hours . …”
    Enlace del recurso
    Tesis
  17. 157

    Evaluación de carbono en ecosistemas terrestres en Tizimín, Yucatán, México por García García, Dora Alicia

    Publicado 2019
    “…The sampling was carried out according to the cardinal points (N, S, E, W). The twigs were separated to place them in paper bags with a capacity of 3 kg, identify them with a code and they will be processed in the weight of each of them, 3 subsamples of each tree will be obtained the answers of the Carbon Laboratories, Technology Laboratory of the Wood and Laboratory of Chemistry of the Faculty of Forestry Sciences of the Autonomous University of Nuevo Leon, where the samples are at a temperature of 75 ° C in a digital drying oven brand Riossa model HCF-102-D for 72 hours . …”
    Enlace del recurso
    Tesis
  18. 158

    Análisis de expresión de genes de Mycobacterium tuberculosis durante la infección a macrófagos por Barrios García, Hugo Brígido

    Publicado 2006
    “…THP-1 cells monolayers differentiated to macrophages by phorbol myristate acetate (PMA) were infected with M. tuberculosis strains CDC1551, H37Rv and DR689 with a variable multiplicity of infection (MOI): 10:1, 1:1 and 0.1:1 (bacteria:macrophage) and incubated at various time points. Cytotoxicity was observed as areas of clearing and cell agglomeration and the effect was dependent on bacilli inoculum and incubation time. …”
    Enlace del recurso
    Tesis
  19. 159

    Análisis de expresión de genes de Mycobacterium tuberculosis durante la infección a macrófagos por Barrios García, Hugo Brígido

    Publicado 2006
    “…THP-1 cells monolayers differentiated to macrophages by phorbol myristate acetate (PMA) were infected with M. tuberculosis strains CDC1551, H37Rv and DR689 with a variable multiplicity of infection (MOI): 10:1, 1:1 and 0.1:1 (bacteria:macrophage) and incubated at various time points. Cytotoxicity was observed as areas of clearing and cell agglomeration and the effect was dependent on bacilli inoculum and incubation time. …”
    Enlace del recurso
    Tesis

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