The morphological changes which take place in the differentiation of the adult Drosophila eye from the larval imaginal disc have been described from a histological and cytological standpoint by Shatoury (1956, 1963) and Shatoury & Waddington (1957). In addition, Gottschewski (1960), Gottschewski & Querner (1961), and Schneider (1964) have studied these processes in eyes and brains in vitro. The...

En el sufismo la experiencia visionaria (ru’ya) es uno de los principales métodos conocimiento profundo realidad (ḥaqīqa). La visión verídica (ru’ya ṣadīqa) y despierta fi-l yaqẓa) son las vías acceso al mundo imaginal (‘ālam al-mithāl) a hermenéutica vital que se desprende estas experiencias. Este trabajo recoge analiza desde una perspectiva filosófica experiencias visionarias más importantes ...

The morphological changes which take place in the differentiation of the adult Drosophila eye from the larval imaginal disc have been described from a histological and cytological standpoint by Shatoury (1956, 1963) and Shatoury & Waddington (1957). In addition, Gottschewski (1960), Gottschewski & Querner (1961), and Schneider (1964) have studied these processes in eyes and brains in vitro. The...

Patterning of the developing limbs by the secreted signaling proteins Wingless, Hedgehog and Dpp takes place while the imaginal discs are growing rapidly. Cells born in regions of high ligand concentration may be displaced through growth to regions of lower ligand concentration. We have used a novel lineage-tagging method to address the reversibility of cell fate specification by morphogen grad...