Marta Annunziata

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Among its pleiotropic actions, ghrelin modulates insulin secretion and glucose metabolism. Herein we investigated the role of ghrelin in pancreatic ␤-cell proliferation and apoptosis induced by serum starvation or interferon (IFN)-␥/TNF-␣, whose synergism is a major cause for ␤-cell destruction in type I diabetes. HIT-T15 ␤-cells expressed ghrelin but not(More)
We investigate experimentally the effective Coulomb friction exerted by a granular medium on a shearing plate, varying the medium depth. The plate is driven by a spring connected to a motor turning at a constant speed and, depending on the system configuration, performs continuous sliding or stick and slip in different proportions. We introduce an order(More)
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