CONTROLLO GLICOMETABOLICO E ABITUDINI ALIMENTARI IN ADOLESCENTI CON DIABETE MELLITO TIPO 1

Background: Gli studi che hanno valutato le abitudini alimentari dei bambini e adolescenti con diabete, hanno riportato una percentuale di assunzione di carboidrati più bassa di quella minima raccomandata spesso associata ad un maggiore consumo di grassi e ad una ridotta assunzione di fibre . Alcuni studi che hanno valutato il rapporto tra composizione della dieta e controllo glicometabolico in soggetti con diabete tipo 1, hanno evidenziato che una dieta ricca di grassi e povera di fibre è associata ad un peggior controllo glicometabolico. Obiettivo: Valutare in adolescenti affetti da diabete mellito tipo 1, con diverso grado di controllo metabolico, la frequenza di consumo settimanale dei vari gruppi di alimenti e l’eventuale correlazione di questa con i valori di emoglobina glicosilata ( HbA1c). Metodo: In 43 soggetti (M/F :22/21; età 11-14 anni) suddivisi in due gruppi in rapporto al valore mediano di HbA1c ( 8,45%), sono stati raccolti i dati relativi ai consumi alimentari degli ultimi tre mesi attraverso un questionario di frequenza di consumo ed è stata considerata la frequenza di scelte alimentari settimanali per gruppo di alimenti. Risultati I soggetti con miglior controllo glicometabolico (HbA1c< 8,45%) presentavano una maggiore frequenza di consumo settimanale dei seguenti gruppi di alimenti: frutta( p<0,0001) , ortaggi (p=0,017) e legumi ( p=0,03). I soggetti con peggior controllo glicometabolico ( HbA1c > 8,45%) consumavano con maggiore frequenza alimenti appartenenti al gruppo di salumi (p=0,007), formaggi (p=0,02) e dolci /bevande zuccherate (p=0,0065). I valori di HbA1c erano inversamente correlati alla frequenza di consumo settimanale di frutta ((r – 0,65 p< 0,0001) e a quello di ortaggi( r – 0,32 p < 0,017) e direttamente correlati alla frequenza settimanale di consumo di alimenti appartenenti ai gruppi di salumi ( r 0,37 p< 0,007). Conclusioni: Il controllo glicometabolico in adolescenti con diabete tipo 1 è influenzato dalla frequenza di consumo settimanale di alimenti ricchi di fibre e di grassi animali. I principi di una san

First experimental evidence of 2He decay from 18Ne excited states

Two-proton decay from 18Ne excited states has been studied by complete kinematical detection of the decay products. The 18Ne nucleus has been produced as a radioactive beam by 20Ne projectile fragmentation at 45 AMeV on a 9Be target, using the FRIBs in-flight facility of the LNS. The 18Ne at 33 AMeV incident energy has been excited via Coulomb excitation on a natPb target. The correlated 2p emission has been disentangled from the uncorrelated 2p emission using a high granularity particle detector setup allowing the reconstruction of momentum and angle correlations of the two emitted protons. The obtained results unambiguously show that the 6.15 MeV 18Ne state two-proton decay proceeds through 2He emission (31%) and democratic or virtual sequential decay (69%)

Alpha-particle clustering in excited expanding self-conjugate nuclei

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The FRIBs@LNS facility produces Radioactive Ion Beams (RIBs) at intermediate energies, by projectile fragmentation. The possibility of using the produced RIBs as secondary beams in nuclear physics experiments by applying the tagging technique, i.e. the identification, event-by-event, in charge, mass and energy of each ion of the RIBs cocktail selected by the fragment separator, before it interacts with the secondary target, has been demonstrated. In 2010 an upgrade of the facility has been performed. Status and perspectives of the FRIBs@LNS facility are discussed

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Production of α\alpha-particle condensate states in heavy-ion collisions

The fragmentation of quasi-projectiles from the nuclear reaction $^{40}Ca$ + $^{12}C$ at 25 MeV/nucleon was used to produce excited states candidates to $\alpha$-particle condensation. The experiment was performed at LNS-Catania using the CHIMERA multidetector. Accepting the emission simultaneity and equality among the $\alpha$-particle kinetic energies as experimental criteria for deciding in favor of the condensate nature of an excited state, we analyze the $0_2^+$ and $2_2^+$ states of $^{12}$C and the $0_6^+$ state of $^{16}$O. A sub-class of events corresponding to the direct 3-$\alpha$ decay of the Hoyle state is isolated.Comment: contribution to the 2nd Workshop on "State of the Art in Nuclear Cluster Physics" (SOTANCP2), Universite Libre de Bruxelles (Belgium), May 25-28, 2010, to be published in the International Journal of Modern Physics

Noncommutative deformation of four dimensional Einstein gravity

We construct a model for noncommutative gravity in four dimensions, which reduces to the Einstein-Hilbert action in the commutative limit. Our proposal is based on a gauge formulation of gravity with constraints. While the action is metric independent, the constraints insure that it is not topological. We find that the choice of the gauge group and of the constraints are crucial to recover a correct deformation of standard gravity. Using the Seiberg-Witten map the whole theory is described in terms of the vierbeins and of the Lorentz transformations of its commutative counterpart. We solve explicitly the constraints and exhibit the first order noncommutative corrections to the Einstein-Hilbert action.Comment: LaTex, 11 pages, comments added, to appear in Classical and Quantum Gravit