Tomás A. Pérez

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At 39.5 degrees C in the temperature-sensitive, conditional-lethal mutant ldlG, glycoprotein processing is disrupted and secretion is blocked. The ultrastructure of the Golgi apparatus in ldlG cells was examined using immunofluorescence and immunoelectron microscopy. At 34 degrees C the structure of the Golgi apparatus was normal, whereas after incubation(More)
Neisseria gonorrhoeae is a gram-negative diplococcus that in human beings produces gonorrhea. Much clinical evidence has led to the conclusion that gonococcus has important mechanisms to evade host immune functions; however, these mechanisms are only now beginning to be elucidated. In this study, we determined that the BALB/c mouse is a good animal model to(More)
In this paper we have gathered some interesting techniques to evaluate educative systems. Our main purpose is to evaluate HEZINET, an adaptive hypermedia System for education available commercially. Therefore, we also include a system evaluation plan to identify which types and techniques of evaluation will be needed in order to accomplish it.