Ultrastructure of Sorubim lima (Teleostei, Siluriformes, Pimelodidae) spermiogenesis

The spermiogenesis and the spermatozoon ultrastructure of Sorubim lima were studied. Our observations showed that early spermatids are round-shaped cells, have spherical nucleus with diffuse chromatin, small quantity of mitochondria and large amount of vesicles in the cytoplasm. During the differentiation process in the nucleus, chromatin compacts in a progressive and homogeneous way, and the flagellum is formed. In the cytoplasm the vesicles, that have double membranes, aggregate and fuse on the plasma membrane. The spermatozoa of 5. lima have no acrosome and show spherical nucleus with homogeneous and highly compacted chromatin, intermediary piece with mitochondria and double wall vesicles contiguous to the plasma membrane, as well as a flagellum formed by a basic axoneme (9 + 2).

Limitaciones en las experiencias de organizacion y participacion de las mujeres de sectores urbano-populares en Lima

Incluye Bibliografía

Lima, uma cidade entre a aristocracia e a plebe (1950-1980)

The city of Lima has undergone serious changes over the past sixty years. Until the middle of the last century, Lima retained an urban structure similar to that built in the 18th century, during the final decades of its colonial period. This reality began to change with the abrupt onset of migration from the mountain ranges to the coast in 1946. However, rather than changes in its urban plan, Lima underwent a ethnic and social reconfiguration that would bring new color and new cultural and behavioral norms to the Peruvian capital. The arrival of migrants to the city caused a conservative reaction in the local elites, but it also sparked a need for the intelligentsia to develop new ways of thinking about the place of migrants in the space of the city, and on the other hand, to create new representations of the city itself. From being a city isolated from the rest of the country, Lima came to live with a range of cultural and ethnic references. It did so, however, without creating greater opportunities for the integration of the masses within the urban and social logic of the city, thus making clear the separation between the aristocracy and the general populace.

Propuesta metodológica de seguimiento y monitoreo de programas y proyectos de mejoramiento barrial en Lima, Perú

Incluye Bibliografía

Migrants to Metropolitan Lima, a case study

Includes bibliography

Migrants to Metropolitan Lima; a case study

Includes bibliography

Peru: migracion, educacion y fecundidad en los estratos sociales bajos de Lima metropolitana

Incluye Bibliografía

Peru: estudio de la mano de obra femenina en dos centros urbanos, en diferentes etapas de desarrollo, Lima metropolitana e Iquitos (1966 y 1967)

Incluye Bibliografía

Documentos presentados a la II Conferencia de Ministros y Jefes de Planificación de América Latina y el Caribe, Lima, 15-18 de noviembre de 1978

Incluye Bibliografía

Revision of Nathan Banks type specimens of Bdellidae Dugès (Acari: Trombidiformes) of the Museum of Comparative Zoology, Cambridge

In this article, seven Bdellidae Dugès (Acari: Trombidiformes) of the Museum of Comparative Zoology, originally described by Nathan Banks are studied: Cyta americana (Banks, 1902), Bdella tenella Banks, 1896, Bdella utilis Banks, 1914, Bdella californica Banks, 1904, Bdella cardinalis Banks, 1894, Bdella peregrina Banks, 1894 and Bdella brevitarsis Banks. Bdella tenella and Bdella californica are transferred to the genera Spinibdella and Bdellodes, respectively. Bdella brevitarsis, previously a nomen nudum, is herein described for the first time under the genus Hexabdella. http://zoobank.org/urn:lsid: zoobank.org:pub:A18C8C10-8C8A-4873-AF0B-D1A9164CD7E8 © 2013 Copyright 2013 Taylor & Francis.

Draft resolutions adopted by the Economic Commission for Latin America at its Twentieth Session, Lima, Peru, 28 March-6 April 1984

Includes bibliography

Proyecto de informe de la Reunión de Coordinación de Organismos Internacionales para Apoyar las Actividades Latinoamericanas y del Caribe para el Año Internacional de la Juventud, Lima

Presenta la organizacion y resumen de los debates de la reunion cuyos objetivos eran: conocer las actividades preparatorias para el AIJ realizadas por los distintos organismos; identificar areas de accion e investigacion y definir puntos de colaboracion interinstitucional; promover la difusion de la informacion proveniente de las actividades identificadas; y, sobre la base de lo anterior, estimular a los gobiernos para que realicen diagnosticos nacionales sobre la juventud y elaboren sus propias estrategias.

Migración y urbanización: las barriadas limeñas: un caso de integración a la vida urbana = Migration and urbanization: The barriadas" of Lima: an example of integration into urban life"

Los documentos del Seminario fueron publicados por UNESCO en 1961 con el título: La urbanización en América Latina/Urbanization in Latin America