0000000001019086
AUTHOR
G. Bonafede
Neurotransmitters adenosine triphosphate and noradrenaline induce nitric oxide release in rat vas deferens.
1. In rat vas deferens, electrical field stimulation (EFS) evoked a muscular biphasic tetrodotoxin (TTX)-sensitive contractile response. 2. The amplitude of this response increased with the frequency of stimulation. 3. After each stimulation, nitric oxide (NO) release was assayed and found to be released in a frequency-dependent manner. 4. NO release also occurred after treatment with exogenous neurotransmitters, adenosine 5'-triphosphate (ATP) and noradrenaline (NA). 5. Prazosin and pyridoxalphosphate-6-azophenyl-2',4'-disulphonic acid (PPADS), respective antagonists of alpha1-adrenoceptors and P2x purinoceptors, inhibited NO release induced by NA and ATP. Both prazosin and PPADS inhibited…
Erraticism and multicultural permeability of urban fabric in Palermo
Interactions between physical and social space draw different urban dimensions, or cultural landscape mosaics, which constantly change and evolve. The shape of the city promotes or discourages multiculturalism and social relations. The latter, in turn, reverberate in the way in which urban space is used, not only to meet basic needs - dictated by reason of survival (housing, employment, and services for education, care, leisure, etc.), but also because the inhabitants are driven by the desire for happiness and the simultaneous meeting that Lefebvre described as the “individualization in socialization”. Migrants groups have historically inhabited the central areas of cities, initially approp…