934 resultados para list of debtors of the tax system


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Presenta el programa de trabajo, 1982-1983, aprobado por la Comision en su 19 periodo de sesiones. Proporciona informacion detallada de los programas de alimentacion y agricultura, politicas de desarrollo, medio ambiente, asentamientos humanos, desarrollo industrial, comercio internacional, cooperacion economica, recursos naturales y energia, poblacion, empresas transnacionales, ciencia y tecnologia, desarrollo social, estadisticas, transportes, informacion y documentacion. Incluye las sugerencias y cambios solicitados por los gobiernos miembros de la CEPAL durante la reunion.

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The insulin-like growth factor (IGF) system is related to quality of oocytes and embryos. The aim of this study was to investigate the mRNA levels of IGF1 and IGF2 and their receptors, IGFR1 and IGFR2, as well as IGFBP2, IGFBP4, and PAPP-A in oocytes from Nelore compared to Holstein cows. Pools of oocytes (20 oocytes/pool) from Nelore (n=8 pools) and Holstein (n=4 pools) were obtained via ovum pick-up (OPU, 10 sessions) and cumulus cells and zona pellucida were removed. The pools were submitted to total RNA extraction. Expression of members of the IGF system was assessed by real time RT-PCR. The mRNA expression of IGF1 and IGF2, IGFR1 and IGFR2, IGFBP2 and IGFBP4 was significantly higher (P<0.01) in oocytes from Holstein whereas the expression of PAPP-A was significantly higher (P<0.05) in oocytes from Nelore cows. The high PAPP-A expression and the low expression of IGFBP2 and IGFBP4 are associated with more efficient degradation of IGFBPs, which results in greater bioavailability of IGF in Nelore oocytes when compared to the Holstein. © 2013 Elsevier B.V.

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Da cuenta de las principales actividades operacionales realizadas por el sistema de la CEPAL desde el 21 periodo de sesiones de la Comision, especialmente en el marco de su resolucion 486(XXI): Cooperacion tecnica y economica entre paises y regiones en desarrollo.

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Rev.2 corresponde a la versión en inglés