A cytological study of the O5 chromosomal inversion of Drosophila subobscura (Diptera, Drosophilidae)

The O5 chromosomal inversion has been a cornerstone for understanding different aspects of the American colonization by Drosophila subobscura. To obtain more information of this evolutionary event it is important to know the pattern of bands of this inversion in detail. Comparing this pattern with that of D. melanogaster it is possible to predict which genes are located inside or close to the O5 inversion and use them as genetic markers. In this study, the complete band pattern of the O5 inversion is presented. Furthermore, the most important genes located inside it have been predicted. Finally, a constriction located close to the proximal breakage point of the O5 inversion has been observed many times and its possible genetic significance is discussed

Métodos psicofísicos no glaucoma: contribuiçäo do estudo da sensibilidade ao contraste / Psychophysic methods in glaucoma: a contribution to the study of contrast sensitivity

Os autores usaram as tábuas de contraste de Arden no estudo de doentes portadores de hipertençäo ocular näo acompanhada de outros sinais conclusivos de glaucoma e também no controle de doentes glaucomatosos. Tiraram algumas conclusöes a cerca do interesse clínico deste método usado em associaçäo a outros exames psico-físicos tais como a campimetria e o estudo da visäo cromática