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  1. 141

    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
  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
  4. 144

    Estrategias para una sucesión exitosa en la empresa familiar = Strategies for a sucessuful succession in family business. por García, Mayra E.

    Publicado 2007
    “…The strategies proposed in this study are: Creating a Family Business Conseil; Choosing the succesor from an analitical point of view; Get pschicologist support in the succesion period; To create a Business Society; Partial Retirement of Director; An adequate compensation management; Open communication among all the members; and a provisional management. …”
    Enlace del recurso
    Artículo
  5. 145
  6. 146

    Polimorfismo de los genes que codifican para las proteínas VP4, VP7 y NSP4 de rotavirus y su asociación con la severidad de la diarrea por González Ochoa, Guadalupe

    Publicado 2006
    “…Abstract Of the viruses that cause gastroenteritis, rotavirus is the main causal agent of severe diarrhea; it causes the fence death 440,000 children per year at world-wide level. Some researchers point to proteins VP4, VP7 and NSP4 like pathogenicity factors; VP4 and VP7 are related with the penetration viral into epithelial cells and the synthesis of neutralization antibodies; NSP4 is the first described viral enterotoxin, which, by means of an increase in Ca2+ it triggers the diarrheic processes. …”
    Enlace del recurso
    Tesis
  7. 147

    Polimorfismo de los genes que codifican para las proteínas VP4, VP7 y NSP4 de rotavirus y su asociación con la severidad de la diarrea por González Ochoa, Guadalupe

    Publicado 2006
    “…Abstract Of the viruses that cause gastroenteritis, rotavirus is the main causal agent of severe diarrhea; it causes the fence death 440,000 children per year at world-wide level. Some researchers point to proteins VP4, VP7 and NSP4 like pathogenicity factors; VP4 and VP7 are related with the penetration viral into epithelial cells and the synthesis of neutralization antibodies; NSP4 is the first described viral enterotoxin, which, by means of an increase in Ca2+ it triggers the diarrheic processes. …”
    Enlace del recurso
    Tesis
  8. 148
  9. 149
  10. 150

    ESTUDIO PILOTO PARA EL AISLAMIENTO DE VIBRIO SPP EN OSTRAS (CRASSOSTREA RHIZOPHORAE) CAPTURADAS EN LA CIÉNAGA DE LA VIRGEN, CARTAGENA, COLOMBIA por López, Lersy, Manjarrez, Ganiveth, Herrera, Lilibeth, Montes, Ana, Olascuaga, Yuranis, Ortega, Rolando

    Publicado 2010
    “…However, oysters have been hold responsible as possible significant vectors for food poisoning. to test oysters (Crassostrea rhizophorae) capture in la Ciénaga de la Virgen for contamination with Vibrio, in order to put the appropriated local costumer health care authorities, under alert. 67 Oysters, belonging to 5 strategic points through the Ciénaga de la Virgen (Pantalla metálica, Mangles cielo mar sector, Espolones, Mangles airport sector y Mangles oriental sector) were analyzed, between February and April 2006. …”
    Enlace del recurso
    Artículo
  11. 151

    Quality evaluation of the educational systems & educational administration and institutions (Evaluación de calidad de un sistema educativa: aspectos educativos e institucionales) por Pazhakh, A.R.

    Publicado 2006
    “…Different analytical and conceptual approaches to these points are given. Conclusions are drawn and future lines of research in these topics are suggested and pointed out. …”
    Enlace del recurso
    Artículo
  12. 152
  13. 153
  14. 154

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor por Loredo Cancino, Margarita

    Publicado 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
    Enlace del recurso
    Tesis
  15. 155

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor por Loredo Cancino, Margarita

    Publicado 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
    Enlace del recurso
    Tesis
  16. 156
  17. 157

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

    Publicado 2019
    “…La metodología utilizada para llevar a cabo esta investigación fue con muestreos de sitios permanentes de los últimos 5 años, obtenidos a partir de inventario forestal. …”
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    Tesis
  18. 158

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

    Publicado 2019
    “…La metodología utilizada para llevar a cabo esta investigación fue con muestreos de sitios permanentes de los últimos 5 años, obtenidos a partir de inventario forestal. …”
    Enlace del recurso
    Tesis
  19. 159

    Determinantes de la demanda por transporte público y privado en el área metropolitana de monterrey por Galán González, José Raymundo

    Publicado 2005
    “…These models allow us to create possible scenarios that permit us to preview what transport policies could increase the use of public transport in 10 percentage points, which is one of the objectives established by the Nuevo Leon Transport Bureau.…”
    Enlace del recurso
    Artículo
  20. 160

    Bioestratigrafía y microfacies de la formación cuesta del cura (cretácico inferior) en la Cañada Guadalupe del municipio de Iturbide, Nuevo León, México. por Coronado Díaz, Miroslava

    Publicado 2018
    “…La escaza información que se tiene a la mano relacionada con los puntos focales de esta investigación está basada en organismos más complejos como lo son los ammonoideos y demás organismos macroscópicos, es por ello que la carencia de estudios basados en los foraminíferos no ha permitido que se establezcan secuencias bioestratigráficas más concretas. …”
    Enlace del recurso
    Tesis

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