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Osservazioni ultrastrutturali sul determinante germinale dei Dafnidi

Fulvio Zaffagnini;  Maria Luisa Lucchi — 1970

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Origin and fine structure of the germ-cell determinant in summer and winter eggs of Daphnia pulex and D. magna were studied. The germ-cell determinant appears in the perinuclear cytoplasmic region of the oocyte still undifferentiated from its nurse cells, and then it will migrate to the cortical ooplasm. The completely developed germ-cell determinant consists of a coarse network of fine granular and fibrillar material, which is extruded from the nucleus through the pores of the nuclear envelope....

Nucleo mesencefalico del trigemino nell'anitra: effetti della stimolazione del nervo vago e della sostanza reticolare

Ruggero Bortolami;  Ermanno Manni;  Magda Passatore;  Maria Luisa Lucchi;  Rio Perinetti Casoni;  Claudio Manni — 1980

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

The masseteric reflex elicited by electrical stimulation of the mesencephalic trigeminal nucleus (MTN) was influenced by electrical stimulation of the central stump of the vagal nerve and of the reticular formation in the duck; the vagal nerve exerted predominantly inhibition while the reticular formation could inhibit or enhance the jaw reflex movements: increase was the most common effect. Unitary discharge of the MTN was recorded in curarized ducks by means of tungsten microelectrodes. Units...

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