743 research outputs found
La società a costo marginale zero
La tecnologia sarà il driver attraverso cui il mondo autorisolverà i suoi problemi politici, economici e
sociali, concludendo la trasformazione postnovecentesca? In The zero marginal cost society Jeremy Rifkin immagina che la fine del capitalismo moderno, la cui fisionomia è stata mutata dalla globalizzazione e dalla scomparsa del suo opposto socialista, trovi una conclusione inevitabile nella cooperazione e in una società dell’abbondanza
Evolution of indeterminate hepatocellular nodules at Gd-EOB-DPTA-enhanced MRI in cirrhotic patients
To retrospectively analyze the evolution of indeterminate hepatocellular nodules in cirrhotic patients on serial Gd-EOB-DPTA-enhanced MRI, and to identify predictors of HCC development
Human leptospirosis cases in Palermo Italy. The role of rodents and climate
Many regions of the world are increasingly exposed to leptospirosis due to poverty, global warming and high urban density. Here, we report a molecular survey for pathogenic Leptospira spp. in rodents and two symptomatic human cases of leptospirosis in the city of Palermo, Italy.Four rodent species were captured in six areas of the city, and a molecular analysis for pathogenic Leptospira spp. on DNA from the kidney samples showed a different prevalence of leptospirosis in all the species of rodents. In addition, two human cases that occurred in May and October of 2009 in the city were also reported. A 67-year-old woman recovered after antibiotic treatment, whereas a 71-year-old woman did not survive. The weather during both of those times was notable for a violent cloudburst that caused street flooding.For the past several years, the incidence of leptospirosis has remained steady at 9 human cases every 10 years across the entire island of Sicily, with a population of almost 5 million inhabitants.The high prevalence of leptospirosis in rodents and the simultaneous presence of known risk factors, such as a mild/wet climate, street flooding and garbage accumulation, could explain the two cases of leptospirosis within the same city in the same year. This occurrence should raise awareness of this under-estimated zoonosis among public health authorities, especially given the potential fatality among elderly and immune-compromised individuals in urban settings in developed countries. Keywords: Human leptospirosis, Rodents, Climate change, Socio-economic welfare, Public health concer
Diabetes and Obesity as Independent Risk Factors for Osteoporosis: Updated Results from the ROIS/EMEROS Registry in a Population of Five Thousand Post-Menopausal Women Living in a Region Characterized by Heavy Environmental Pressure
EMEROS/ROIS Registry is a project funded by ISBEM and supported by Medicina Futura Research
La sinistra:italiana una commedia in tre atti.
L’entrata nella seconda Repubblica è stata scandita dalla marcia trionfale della
sinistra in predicato di vincere le elezioni politiche. I risultati elettorali più gratificanti
della sinistra sono stati la traballante vittoria del 1996 e le non vittorie (sostanziali
pareggi) del 2006 e del 2013, al contrario erano certe nelle previsioni e nei fatti le
vittorie berlusconiane del 2001 e del 2008
Diatom-derived oxylipins induce cell death in sea urchin embryos activating caspase-8 and caspase 3/7
Diatoms are an important class of unicellular algae that produce bioactive secondary metabolites withcytotoxic activity collectively termed oxylipins, including polyunsaturated aldehydes (PUAs), hydroxy-acids (HEPEs), oxo-acids and epoxyalcohols. Previous results showed that at higher concentrations, thePUA decadienal induced apoptosis on copepods and sea urchin embryos via caspase-3 activation; atlower concentrations decadienal affected the expression levels of the caspase-8 gene in embryos of thesea urchin Paracentrotus lividus. In the present work, we studied the effects of other common oxylip-ins produced by diatoms: two PUAs (heptadienal and octadienal) and four hydroxyacids (5-, 9- 11- and15-HEPE) on P. lividus cell death and caspase activities. Our results showed that (i) at higher concentra-tions PUAs and HEPEs induced apoptosis in sea urchin embryos, detected by microscopic observationand through the activation of caspase-3/7 and caspase-8 measured by luminescent assays; (ii) at lowconcentrations, PUAs and HEPEs affected the expression levels of caspase-8 and caspase-3/7 (isolated forthe first time here in P. lividus) genes, detected by Real Time qPCR. These findings have interesting impli-cations from the ecological point of view, given the importance of diatom blooms in nutrient-rich aquaticenvironments
Antiproton slowing Down in H2 and He and evidence of nuclear stopping power
We report stopping powers of hydrogen and helium for antiprotons of kinetic energies ranging from about 0.5 keV to 1.1 MeV. The Barkas effect, i.e., a difference in the stopping power for antiprotons and protons of the same energy in the same material, shows up clearly in either of the gases. Moreover, below ≈0.5 keV there is indirect evidence for an increase of the antiproton stopping power. This "nuclear" effect, i.e., energy losses in quasimolecular interactions, shows up in fair agreement with theoretical predictions
Experimental antiproton nuclear stopping power in H2 and D2
Data about antiprotons slowing down in gaseous targets at very low energies (E<1 keV) show that the stopping power in D2 is lower than in H2; the right way to explain this behavior seems to be through a nuclear stopping power derived from the classical Rutherford formula
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