14,892 research outputs found
Opere del conte Algarotti.
No full textIncludes index in vol. 7.Added t.p. in vol. 1, engraved by Giuseppe Patrini. Engraved portrait medallion of the author on t.p. in vol. 1, small woodcut title-vignettes on title pages in vol. 2-10.Mode of access: Internet
Nova Cantieri creativi per Massimo Vitali
No full textMostra fotografica di Massimo Vitali negli spazi industriali dell'ex fabbrica Vaccari di ceramiche a Santo Stefano Magra (SP). L'ideazione del progetto NOVA Cantieri creativi è di LARA CONTE che ha chiesto ad A. Monteverdi di scegliere un artista internazionale per l'esposizione e in base allo spazio sono state scelte una decine di opere di grandi dimensioni intorno alle quali si è svolto il giorno dell'inaugurazione un incontro-conversazione con il fotografo.L'allestimento ha avuto la collaborazione di Sasha Piccolo
Systematics of the genus Avena L.: a preliminary work on the polymorphism of Rubisco
No full textIn this work we have adopted the combination of two methods for the purification of Ribulose-1,5-bisphosphate carboxylase/oxygenase to study the behaviour of pure Rubisco-holoenzyme in Native-PAGE and in SDS-PAGE, of some species of the genus Avena L. with different ploidy levels and genome types. This study demonstrates that differences exist in the charge of the holoenzyme but not in the molecular weight of the subunits, in particular, the diploid with CC-genome is very different from the other diploids (AA-genome) and tetraploids (AACC-genome and AABB-genome) under study
Synergic and Complementary Effects of L-Carnitine and Coenzyme Q on Long-Chain Fatty Acid Metabolism and on Protection against Anthracycline Damage
No full textExogenous L-carnitine and coenzyme Q are used to protect the heart against anthracycline damage and to enhance energy metabolism in the heart and in the muscle. Though their metabolic function is well known and their effects on anthracycline damage have been largely studied, their combined action has not been investigated. Therefore we have used partially CoQ-depleted bovine mitochondria to evaluate the synergic action of CoQ and carnitine on palmitoylCoA oxidation, as an experimental model in which either CoQ or L-carnitine may be the limiting factor in the oxidation of activated fatty acids. The protective effect exerted by the combined use of L-carnitine and CoQ against damage by the anthracycline derivative doxorubicin has been compared to the protection exerted by each compound alone. The effect was evaluated by assessing oxygen consumption and 14C-leucine incorporation in rat heart slices. The results obtained suggest that the administration of an association of L-carnitine and CoQ exerts a stronger protection against anthracycline damage and induces a greater utilization of fatty acids as compared to the effects of each compound alone
Exponentially-fitted quadrature methods for evolution problems with periodic solution
No full textThe interest for numerical solution of physical and biological problems with oscillating and/or periodic
behaviour requires the use of special-purpose methods. Examples include the electromagnetic scattering, the response of nonlinear circuits to a periodic input and the evolution of an age-structuredpopulation. These problems are characterized by either infinite integrals where the integrand function is oscillatory function, or by Volterra integral equations of type with periodic solution. By exploting the Exponential Fitting theory [1, 2, 3, 4,
5], a new class of quadrature rules, that are a generalization of the usual Gauss-Laguerre formulae, for
problem (1) and a new direct quadrature (DQ) method for problem (2) are derived, respectively. Two extra problems appear in the context of building the exponentially-fitted (ef ) DQ method. The first one is the construction of a two-nodes ef quadrature rule of Gaussian type, that is a generalization of the usual two-nodes Gauss-Legendre formula, on which the DQ method is based. The second problem is the building of a suitable ef interpolation technique on four points which preserves the order of
convergence of the overall method. These works are in collaboration with L. Gr. Ixaru (National Institute of Physics and Nuclear Engineering, Bucharest, Romania), B. Paternoster, A. Cardone and D. Conte (University of Salerno).
References
[1] Ixaru, L.Gr.; Vanden Berghe, G., Exponential fitting, Kluwer Academic Publishers, Dordrecht
(2004).
[2] A. Cardone, B. Paternoster, G. Santomauro, Exponential fitting quadrature rule for functional equations, AIP Conference Proceedings 1479 (2012) 1169-1172.
[3] A. Cardone, L. Gr. Ixaru, B. Paternoster, G. Santomauro, Ef-Gaussian direct quadrature methods
for Volterra integral equations with periodic solution, Mathematics and Computers in Simulation (submitted).
[4] D. Conte, B. Paternoster, G. Santomauro, An exponentially fitted quadrature rule over unbounded
intervals, AIP Conference Proceedings 1479 (2012) 1173-1176.
[5] D. Conte, L. Gr. Ixaru, B. Paternoster, G. Santomauro, Gauss-Laguerre quadrature rule for oscillatory integrands, Computational and Applied Mathematics (submitted)
Protection of Adenylate Pool and Energy Charge by L-Carnitine and Coenzyme Q during Energy Depletion in Rat Heart Slices
No full textThe effect of coenzyme Q, of L-carnitine, and of their combination, on the adenine nucleotide pool and the energy charge has been investigated in rat heart slices subjected to energy depletion and recovery. The addition of coenzyme Q or of L-carnitine alone results in a higher value of the energy charge and of the adenine nucleotide pool after hypoxia, reperfusion and rotenone inhibition of the respiratory chain, as compared to controls without additions. The protective effect is much stronger when the two compounds are given together
Introduction : De l 'âme russe vers le corps russe ?
No full textKabakova Galina, Conte Francis. Introduction : De l 'âme russe vers le corps russe ?. In: Cahiers slaves, n°9, 2008. Le corps dans la culture russe et au-delà, sous la direction de Galina Kabakova et Francis Conte. pp. 11-23
How many water molecules are needed to solvate one?
No full textThe comprehension at the molecular scale of the processes involved during solvation still remains a challenge in chemistry. Remarkably, the question concerning how many solvent molecules are necessary to solvate a solute one is still open. By exploring several water clusters of increasing size, we employ semiclassical spectroscopy [1-5] to determine on quantum dynamical grounds the minimal number of surrounding water molecules to make the central one display the same vibrational features of liquid water. We find out that the minimal structure eventually responsible of proper solvation is made of 21 water molecules, and that particular care must be reserved to the quantum description of the combination of the central monomer bending mode with network low-frequency librations.[6] The results obtained with the accurate ab initio potential are then compared with the popular Caldeira-Leggett one to rationalize whether a simplified model can qualitatively and quantitatively describe the solvated system behavior.[7] An ongoing study on how genetic algorithms[8] and adiabatically switched trajectories[9] can help to deconstruct the complex spectrum of the formic acid dimer will be also presented.
[1] E. J. Heller, Acc. Chem. Res. 14, 368-375 (1981).
[2] M. F. Herman and E. Kluk, Chem. Phys. 91, 27-34 (1984).
[3] A. L. Kaledin and W. H. Miller, J. Chem. Phys. 119, 3078-3084 (2003).
[4] M. Ceotto, S. Atahan, G. F. Tantardini and A. Aspuru-Guzik, J. Chem. Phys. 130, 234113 (2009).
[5] M. Ceotto, G. Di Liberto and R. Conte, Phys. Rev. Lett. 119, 010401 (2017).
[6] A. Rognoni, R. Conte and M. Ceotto, Chem. Sci. 12, 2060 (2021).
[7] A. Rognoni, R. Conte and M. Ceotto, J. Chem. Phys. 154, 094106 (2021). [8] M. Gandolfi, A. Rognoni, C. Aieta, R. Conte and M Ceotto, J. Chem. Phys. 153, 204104 (2020). [9] R. Conte, L. Parma, C. Aieta, A. Rognoni and M. Ceotto, J. Chem. Phys. 151, 214107 (2019)
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