ERROR:SQLSTATE[HY000]: General error: 20018 Invalid column name 'CodigoInstitucion'. [20018] (severity 16) [SELECT PublicObrasAutores.NumeroEmpleado, PublicObrasAutores.ApellidoPaterno, PublicObrasAutores.ApellidoMaterno, PublicObrasAutores.Nombre, PublicObrasAutores.NombreCompleto FROM PublicObrasAutores LEFT JOIN PublicObrasAutoresFil ON PublicObrasAutores.RefPublicacion = PublicObrasAutoresFil.RefPublicacion WHERE PublicObrasAutores.RefPublicacion = '378888' AND PublicObrasAutores.NumeroEmpleado IS NULL AND PublicObrasAutoresFil.CodigoInstitucion IS NOT NULL;]
®
ERROR:SQLSTATE[HY000]: General error: 20018 Invalid column name 'CodigoInstitucion'. [20018] (severity 16) [SELECT PublicObrasAutores.NumeroEmpleado, PublicObrasAutores.ApellidoPaterno, PublicObrasAutores.ApellidoMaterno, PublicObrasAutores.Nombre, PublicObrasAutores.NombreCompleto FROM PublicObrasAutores LEFT JOIN PublicObrasAutoresFil ON PublicObrasAutores.RefPublicacion = PublicObrasAutoresFil.RefPublicacion WHERE PublicObrasAutores.RefPublicacion = '378888' AND PublicObrasAutores.NumeroEmpleado IS NULL AND PublicObrasAutoresFil.CodigoInstitucion IS NULL;]
®
ERROR:SQLSTATE[HY000]: General error: 20018 Invalid column name 'Institucion'. [20018] (severity 16) [SELECT Institucion FROM PublicObrasAutoresFil WHERE RefPublicacion = '378888']
®
ERROR:SQLSTATE[HY000]: General error: 20018 Invalid column name 'Institucion'. [20018] (severity 16) [SELECT Institucion FROM PublicObrasAutoresFil WHERE RefPublicacion = 378888 AND InstitucionPropia = 'S'
UNION
SELECT Adscripciones.Entidad FROM PublicacionesObras
JOIN PublicObrasAutores ON PublicacionesObras.Identificador = PublicObrasAutores.RefPublicacion
JOIN Adscripciones ON PublicObrasAutores.NumeroEmpleado = Adscripciones.NumeroEmpleado
WHERE (PublicacionesObras.FechaPublicacion BETWEEN Adscripciones.FechaDesde AND Adscripciones.FechaHasta OR (PublicacionesObras.FechaPublicacion >= Adscripciones.FechaDesde AND Adscripciones.FechaHasta IS NULL)) AND PublicacionesObras.Identificador= 378888]
SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Technical Proceedings Of The 2009 Nsti Nanotechnology Conference And Expo, Nsti-Nanotech 2009 Título del capítulo: Pt-Ru nanoparticles Supported on MWCNT as PEM fuel cell electrocatalysts
Autores UNAM: GABRIEL ALONSO NUÑEZ;
Autores externos: Idioma: Año de publicación: 2009Palabras clave:
Multi Wall Carbon Nanotubes (MWCNT) are used as catalyst support due to their properties such as thermal stability and electron conduction among others [1]. In the last few years, MWCNT have been synthesized using a wide variety of methods; one of them is spray pyrolysis [2]; it presents advantages over other methods, i.e. easiness to control operating conditions and scalability. It had been demonstrated that CNT are obtained using organometallic compounds as catalytic agents [3,4]. This work proposes nickelocene as catalytic agent to grow MWCNT and its use to support metallic nanoparticles. Pt-Ru precursors were deposited on MWCNT using an aqueous deposition method assisted by ultrasound. Electrocatalysts were characterized by SEM-EDS and TEM. MWCNT shows length of 30 microns and diameter between 50 and 70 nm. Pt, Ru and Ni particles obtained are in nanometric scale. Synthesized nanostructured material could be considered as a good candidate for catalyst in PEM or Methanol fuel cells [5].
