Ultrastructural data on the life cycle of the parasite, Perkinsus atlanticus (Apicomplexa), on the clam, Ruditapes phillipinarum, in the Mediterranean

An Apicomplexan Perkinsus species has been found parasitizing the clam Ruditapes philippinarum (= Tapes semidecussatus) collected on the Mediterranean coast in the region of the Ebro Delta (Tarragona, Spain). Light and transmission electron microscopy were used to study different stages of this parasite during zoosporulation induced by incubation in thioglycollate medium and seawater. During incubation the trophozoites began zoosporulation, which originated prezoosporangia and zoosporangia at different developmental stages. Successive cytokinesis and nucleokinesis gave rise to prezoospores, which became elongate and differentiated in biflagellated zoospores. The latter presented large mitochondria and an apical complex formed by a conoid, polar ring, micronemes, rhophtries and subpellicular microtubules. The zoosporangium wall showed some typical lamosomes and a discharge tube developed in early phases of incubation. Ultrastructural data were compared with the only four species of the genus Perkinsus previously described. The morphological data, the host and the geographic proximity suggest that the species located on the Mediterranean coast was Perkinsus atlanticus.

"Colegas" : el aborto en España, 1982-2007

Desde el estreno de Colegas, el 25 de octubre de 1982, hasta los recientes sucesos de noviembre y diciembre de 2007, han pasado veinticinco años, todo un cuarto de siglode relativa paz en el todavía espinoso asunto del aborto, una paz que parece que puede truncarse a raíz delos sucesos aludidos, que no son otros que las acciones fiscales y judiciales contra algunas clínicas de Barcelona en las que se practica la interrupción voluntaria del embarazo...

State of Iowa Transportation Map, 1996

This document is the State Map of Iowa, both front and back of the year in the title. All maps were are in pdf format and can be used as a historical reference.

Governor's Committee on Government Spending Reform : final report, 1996.

Final Report of the Governor's Committee on Government Spending, 1996. The Governor reconvened the Fisher Commission to see what could be done to maintain the fiscal discipline that had been evident since the State spending reforms were put in place, 1992.

Tax differentials and agglomeration economies in intraregional firm location

This paper analyses empirically how differences in local taxes affect the intraregional location of new manufacturing plants. These effects are examined within the random profit maximization framework while accounting for the presence of different types of agglomeration economies (localization/ urbanization/ Jacobs¿ economies) at the municipal level. We look at the location decision of more than 10,000 establishments locating between 1996 and 2003 across more than 400 municipalities in Catalonia, a Spanish region. It is necessary to restrict the choice set to the local labor market and, above all, to control for agglomeration economies so as to identify the effects of taxes on the location of new establishments.