91,899 research outputs found
La canzone di Gianfranco Manfredi
No full textUna ricostruzione dal taglio sociologico dedicata all'immaginario musicale di Gianfranco Manfredi. Una sintesi concettuale che a partire dalla musica affronta temi di diversa natura: la politica, i consumi generazionali, il fumetto, la lotta eversiva, la contestazione
L'effacement du personnage féminin chez Barbey d'Aurevilly
No full textMugnier-Manfredi F. L'effacement du personnage féminin chez Barbey d'Aurevilly. In: Littératures 17, automne 1987. pp. 101-108
Optimum filters for detector charge measurements in presence of 1/f noise
No full textThe optimum shape of the weighting function for detector charge measurements, in the presence of series 1/f noise superimposed on parallel and series white noises, is investigated. The corresponding theoretical limits in charge resolution for finite or infinite processing times have been calculated, and compared with the values obtained using traditional cusplike weighting functions optimum for white noises onl
Realization and characterization of optical frequency standards
No full textDuring the Ph.D. Course I worked on the realization and the characterization of an ytterbium optical frequency standard. Since year 2000, it is possible using optical frequency comb to directly and reliably scale a frequency measurement in the optical domain to a measurement in the microwave domain. This possibility allows the realization of high accuracy and high stability optical frequency standards, whose atomic quality factors are several orders of magnitude higher than the best microwave ones. Among others, the alkaline earth atoms are very promising and, once trapped in an optical lattice, are capable of a short term stability approaching 10−15 at 1 s. A ytterbium optical clock is currently being developed in the laboratories of the Optics Division of Istituto Nazionale di Ricerca Metrologica (INRIM) The experiment aims to cool and trap ytterbium atoms in a two stage magneto-optical trap (MOT) (at 399 nm and 556 nm) and to probe them in an optical lattice with a ultrastable laser at 578 nm. This thesis presents the realization of the required laser sources, the stabilization of the clock laser, the development of the cooling and trapping stages and the design of a new experimental setup. The blue and green radiations for the two-stage MOT at 399 nm and 556 nm are obtained by second harmonic generation in non-linear crystals. The yellow clock laser at 578 nm is generated by sum of frequency in non-linear crystal. The clock laser is stabilized with the Pound-Drever-Hall technique on a high-finesse Fabry-Pérot cavity. The temperature stabilization of the cavity is implemented with a novel Active Disturbance Rejection Control scheme. The frequency noise of the laser is characterized with a stability 3 × 10−15 at 1 s. Atoms are trapped in the blue magneto-optical trap at 399 nm and transferred in the green trap at 556 nm. A new experimental setup is designed, studying the vacuum chamber, the MOT coils and the atomic source. I have been guest researcher at National Institute of Standards and Technology (NIST) for six months in 2011. I will describe development of NIST ytterbium optical clocks during my visi
Considerazioni su Cesare Baronio e la Spagna, tra controversia politica e ricezione erudita
No full textThe study is focused on the complex relationship within Cesare baronio and the Spanish Monarchy, in the new political and historical context. As a cardinal, as pope confessor, as author, he had a preminent role in all the most relavant disputes between Rome, Madrid and Paris of the beginning of the 17th cent., when the balances and the alliances inside the the catholicism were changing.
Gabriele Manfredi (1681-1761) et le calcul différentiel en Italie
No full textLeibniz rencontra Guglielmini en Italie en 1689-90. Des jeunes mathematiciens de Bologne, E. Manfredi, G. Manfredi, V. F. Stancari, apprirent bientot le nouveau calcul. Une lettre de Leibniz à G.Manfredi sur la solution des équations différentielles est publiée
Probing chiral interactions between L- and D-arginine-based polymers and sodium deoxycholate solutions
No full textNowadays the spontaneous self-organization of a polymer into an ordered structure is a soughtafter property of many smart materials, whose applications might range from catalysis [1] to drugdelivery [2]. However, literature regarding the role played by these specific conformations in chiral recognition remains scarce. In this context, polyamidoamino acids (PAACs) are an emerging class of stimuli-responsive bioinspired synthetic polymers able to self-assemble into pH depend conformations [3,4]. PAACs are an off-spring of polyamidoamines (PAAs), a family of polymers obtained by the Michael-type polyaddition of prim-monoamines or sec-diamines with bisacrylamides. The reaction occurs in aqueous solution at pH = 8–9 and at room temperature. By using α-amino acids as monomers, PAACs are obtained.
The first example of PAAC was named ARGO7, obtained by the stepwise polyaddition in water of L- or D-arginine to N,N’-methylenebisacrylamide. Results indicated Mn 8500, PDI 1.4 and Rh of 1.2 nm [3]. Molecular dynamics (MD) and circular dichroism (CD) showed ARGO7 folded into a rigid structure, reminiscent of the hairpin conformation, solely driven by the polymer main chain. Due to its ability to self-assemble in solution forming chiral structures, L- and D-ARGO7 may selectively interact with biological components.
To assess chiral recognition, sodium deoxycholate (NaDC), one of the components of bile salts, was chosen as a chiral model surface. In aqueous solution, NaDC showed three different pH dependent behaviour: homogeneous solution (pH>8), gel phase (pH 7-8) and aggregation/flocculation (pH<6.5). Notwithstanding the ability of NaDC to self-assemble into different conformations at each pH interval, signs of chiral recognition were found in NaDC gel phase only. Conformational modifications were probed by circular dichroism spectroscopy: both D- and L-ARGO7 changed shape and magnitude of the CD pattern, whereas D,L-ARGO7 did not modify the CD spectra of NaDC. After 8 days, NaDC compact structure loosened, ended up being fluid and the CD pattern were completely modified due to NaDC and D- or L-ARGO7 interactions. Incoming diffusion NMR and SANS studies will probably highlight the mechanisms and dynamics of the chiral interactions in these polyelectrolyte-micelle systems.
[1] Luo, R.; Zhu, M.; Shen, X.; Li, S. J. Catal. 2015, 331, 49. [2] Quiñones, J. P.; Peniche, H.; Peniche, C. Polymers. 2018, 10, 3, 235. [3] Manfredi, A.; Mauro, N.; Terenzi, A.; Alongi, J.; Lazzari, F.; Ganazzoli, F.; Raffaini, G.; Ranucci, E.; Ferruti, P. ACS Macro Lett. 2017, 6, 987. [4] Lazzari, F.; Manfredi, A.; Alongi, J.; Mendichi, R.; Ganazzoli, F.; Raffaini, G.; Ferruti, P.; Ranucci, E. Polymers 2018, 10, 1261
Chiral recognition in D-, L-arginine derived polyamidoamino acids and sodium deoxycholate solutions
No full textNowadays the spontaneous self-organization of a polymer into an ordered structure is a sought-after property of many smart materials, whose applications might range from catalysis1 to drug-delivery2. However, literature regarding the role played by these specific conformations in chiral recognition remains scarce. In this context, polyamidoamino acids (PAACs) are an emerging class of stimuli-responsive bioinspired synthetic polymers able to self-assemble into pH depend conformations.3,4 Arginine based PAACs, named ARGO7, were obtained in water at pH 8-9 from the stepwise polyaddition of L- or D-arginine to N,N’methylenebisacrylamide. Results indicated Mn 8500, PDI 1.4 and Rh of 1.2 nm.3 Molecular dynamics (MD) and circular dichroism (CD) showed ARGO7 folded into a rigid structure, reminiscent of the hairpin conformation, solely driven by the polymer main chain. Due to its ability to self-assemble in solution forming chiral structures, L- and D-ARGO7 may selectively interact with biological components. To assess chiral recognition, sodium deoxycholate (NaDC), one of the components of bile salts, was chosen as a chiral model surface. In aqueous solution, NaDC showed three different pH dependent behaviour: homogeneous solution (pH>8), gel phase (pH 7-8) and aggregation/flocculation (pH<6.5). Notwithstanding the ability of NaDC to self-assemble into different conformations at each pH interval, signs of chiral recognition were found in NaDC gel phase only. Conformational modifications were probed by circular dichroism spectroscopy: both D- and L-ARGO7 changed shape and magnitude of the CD pattern, whereas D,LARGO7 did not modify the CD spectra of NaDC. After 8 days, NaDC compact structure loosened, ended up being fluid and the CD pattern were completely modified due to NaDC and D- or L-ARGO7 interactions. Incoming SANS studies will probably highlight the mechanisms and dynamics of the chiral interactions in these polyelectrolyte-micelle systems.
(1) Luo, R.; Zhu, M.; Shen, X.; Li, S. J. Catal. 2015, 331, 49. (2) Quiñones, J. P.; Peniche, H.; Peniche, C. Polymers. 2018, 10, 3, 235. (3) Manfredi, A.; Mauro, N.; Terenzi, A.; Alongi, J.; Lazzari, F.; Ganazzoli, F.; Raffaini, G.; Ranucci, E.; Ferruti, P. ACS Macro Lett. 2017, 6, 987. (4) Lazzari, F.; Manfredi, A.; Alongi, J.; Mendichi, R.; Ganazzoli, F.; Raffaini, G.; Ferruti, P.; Ranucci, E. Polymers 2018, 10, 1261
Evaluación de híbridos de maíz en diez localidades del centro norte de Córdoba, campaña 2020/21
No full textEl rendimiento promedio estimado para la provincia fue de aproximadamente 87,1 qq/ha, la producción total fue próxima a 22,4 millones de tn. Debido a la importancia del cultivo de maíz en la región, la EEA INTA Manfredi condujo ensayos comparativos de evaluación de híbridos bajo condiciones de manejo del productor durante la campaña 2019/20, en 10 localidades representativas de las agencias de extensión de INTA. Una adecuada caracterización de los híbridos ajustada por ambiente facilita la elección de
los mismos para maximizar los rendimientos y a través de estos estudios en posible identificar la adaptabilidad de los cultivares a diferentes ambientes. El objetivo del presente trabajo fue evaluar el rendimiento, comportamiento a enfermedades y parámetros de calidad de los híbridos de maíz bajo sistemas de siembra directa e identificar aquellos híbridos mejor adaptados a cada región.
En este informe se presenta el comportamiento frente a las enfermedades, rendimientos y resultados económicos de diferentes híbridos en 10 sitios de evaluación.EEA ManfrediFil: Ferreyra, M. L. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Área Mejoramiento Genético Vegetal. Grupo soja, trigo, maíz; ArgentinaFil: Cavatelli M. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Villa María; ArgentinaFil: Guendulain, A. E. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Ucacha; ArgentinaFil: Capuccino, V. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Oncativo; ArgentinaFil: Druetta, R. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Brinkmann; ArgentinaFil: Triadani, C. O. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Villa de María de Río Seco; ArgentinaFil: Cordes, G. G. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agronomía. Grupo de trabajo Agricultura de Precisión Cosecha y Poscosecha; ArgentinaFil: Moretto, M. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Villa María; ArgentinaFil: Villarreal, L. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Villa María; ArgentinaFil: Luque, P. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Villa María; ArgentinaFil: Centeno, A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural San Francisco; ArgentinaFil: Molina, J. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia de Extensión Rural Río Tercero; ArgentinaFil: Suarez, F. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Villa de María de Río Seco; ArgentinaFil: Molino, J. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Oncativo; ArgentinaFil: Cordes, D. D. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Jesús María; ArgentinaFil: Candela, R. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural Jesús María; ArgentinaFil: Monetti, M. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agencia De Extensión Rural General Cabrera; ArgentinaFil: Cordes, G. G. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Agronomía. Grupo Agricultura de Precisión Cosecha y Poscosecha; ArgentinaFil: Erreguerena, I. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Área Agronomía. Grupo Protección Vegetal; ArgentinaFil: Rodríguez, A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Área Agronomía. Grupo Protección Vegetal; ArgentinaFil: Barberis, N. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Departamento Economía, Estadística, Informática, Biblioteca y Comunicaciones. Grupo Economía; ArgentinaFil: Salinas, A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Dirección Institucional; Argentin
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