RESUMEN
Ni/MgO-CNTs catalysts are prepared by in situ chemical vapor deposition growth of CNTs on Ni/MgO. These catalysts exhibit an improved performance for the production of synthetic natural gas from syngas, which is attributed to the formation of highly catalytic active interfaces among Ni, CNTs and MgO.
Asunto(s)
Óxido de Magnesio/química , Metano/síntesis química , Nanotubos de Carbono/química , Níquel/química , Monóxido de Carbono/química , Catálisis , Gas NaturalRESUMEN
In this report we describe the case of an immunocompetent patient found to have an endobronchial, ulcerated lesion due to Mycobacterium kansasii. Predisposing factors could have been severe endobronchial stenosis of the main stem bronchi and distortion of the carina, due to healed endobronchial tuberculosis. Diagnosis was set through fiberoptic bronchoscopy and the patient responded well to treatment. Endobronchial non tuberculous mycobacterial infection should be considered in both HIV seropositive and seronegative patients, especially in endemic areas and in the proper clinical setting. Prompt recognition is important for the effective control and prevention of an unfavorable outcome in an otherwise easily treatable disease.
Asunto(s)
Enfermedades Bronquiales/microbiología , Infecciones por Mycobacterium no Tuberculosas/diagnóstico , Infecciones por Mycobacterium no Tuberculosas/microbiología , Mycobacterium kansasii/aislamiento & purificación , Úlcera/microbiología , Antibióticos Antituberculosos/uso terapéutico , Bronquios/microbiología , Bronquios/patología , Enfermedades Bronquiales/diagnóstico , Enfermedades Bronquiales/terapia , Broncoscopía , Diagnóstico Diferencial , Humanos , Inmunocompetencia , Masculino , Persona de Mediana Edad , Infecciones por Mycobacterium no Tuberculosas/tratamiento farmacológico , Infecciones por Mycobacterium no Tuberculosas/inmunología , Resultado del Tratamiento , Tuberculosis/diagnóstico , Úlcera/diagnóstico , Úlcera/terapiaRESUMEN
p300 and the closely related CREB binding protein (CBP) are transcriptional adaptors that are present in intracellular complexes with TATA binding protein (TBP) and bind to upstream activators including p53 and nuclear hormone receptors. They have intrinsic and associated histone acetyltransferase activity, suggesting that chromatin modification is an essential part of their role in regulating transcription. Detailed characterization of a panel of antibodies raised against p300/CBP has revealed the existence of a 270-kDa cellular protein, p270, distinct from p300 and CBP but sharing at least two independent epitopes with p300. The subset of p300/CBP-derived antibodies that cross-reacts with p270 consistently coprecipitates a series a cellular proteins with relative molecular masses ranging from 44 to 190 kDa. Purification and analysis of various proteins in this group reveals that they are components of the human SWI/SNF complex and that p270 is an integral member of this complex.
