Maestria en Estudios Sociales de la Poblacion 1981-1982: programas analiticos y bibliografias, segundo ano

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Effects of neem oil (Azadirachta indica A. Juss) on midgut cells of predatory larvae Ceraeochrysa claveri (Navás, 1911) (Neuroptera: Chrysopidae)

The effects of ingested neem oil, a botanical insecticide obtained from the seeds of the neem tree, Azadirachta indica, on the midgut cells of predatory larvae Ceraeochrysa claveri were analyzed. C. claveri were fed on eggs of Diatraea saccharalis treated with neem oil at a concentration of 0.5%, 1% and 2% during throughout the larval period. Light and electron microscopy showed severe damages in columnar cells, which had many cytoplasmic protrusions, clustering and ruptured of the microvilli, swollen cells, ruptured cells, dilatation and vesiculation of rough endoplasmic reticulum, development of smooth endoplasmic reticulum, enlargement of extracellular spaces of the basal labyrinth, intercellular spaces and necrosis. The indirect ingestion of neem oil with prey can result in severe alterations showing direct cytotoxic effects of neem oil on midgut cells of C. claveri larvae. Therefore, the safety of neem oil to non-target species as larvae of C. claveri was refuted, thus the notion that plants derived are safer to non-target species must be questioned in future ecotoxicological studies. © 2012 Elsevier Ltd.

Migración entre países latinoamericanos

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La migración interna en Guatemala durante el período 1976-1981

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decifra-me ou te devoro: Uma análise das variáveis e fatores que influenciam o impacto da pesquisa científica desenvolvida na área de sustentabilidade no Brasil

The goal of this research is to analyze what are the key variables and factors that, in the perception of researchers in the field of sustainability in Brazil, may be influencing the impact research conducted by them. Therefore, we designed a data collection instrument with 14 variables, responded online by 89 researchers in the field of sustainability in Brazil. The results show that these researchers realize the impact of their research as a process influenced by four factors.

Informe de actividades del Centro Latinoamericano de Demografía (CELADE), 1981-1983 = Report of the activities of the Latin American Demographic Centre (CELADE), 1981-1983

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Informe de actividades de la Comisión desde mayo de 1981 = Report on the work of the Commission since May 1981 = Rapport d'activités de la Commission depuis mai 1981

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Lista de informes de reuniones auspiciadas por la CEPAL desde mayo de 1981 = List of meetings sponsored by ECLA since May 1981

Publicación bilingüe

Instituto Latinoamericano de Planificación Económica y Social (ILPES): perspectivas futuras y síntesis de actividades 1981-1984 = Latin American Institute for Economic and Social Planning (ILPES): future prospects and summary of activities 1981-1984

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Informe de actividades de la Comisión desde mayo de 1981: actividades de la CEPAL en relación con los desastres naturales ocurridos en América Latina = Report on the work of the Commission since May 1981: ECLA activities in connection with natural disasters in Latin America = Rapport d'activités de la Commission depuis mai 1981: activités de la CEPAL en ce qui concerne les catastrophes naturelles intervenues en Amérique latine

Informe sobre las actividades de la CEPAL en relacion a la asistencia prestada a los paises para evaluar los efectos economicos y sociales que han sufrido a causa de desastres naturales.

Informe (16 de mayo de 1981 a 6 de abril de 1984) = Report (16 May 1981-6 April 1984) = Rapport (16 mai 1981 au 6 avril 1984)

Complementa la información contenida en el documento publicado anteriormente con el símbolo E/CEPAL/G.1302; E/CEPAL/SES.20/G.14