192 research outputs found
Fotosintesi
No full textLa vita sulla Terra è strettamente legata e dipendente dall’energia del Sole.
Il nostro pianeta è immerso nella luce e gli organismi che l’hanno abitato in passato e attualmente lo abitano
hanno evoluto molteplici interazioni con la luce solare.Tra queste, la Fotosintesi, e cioè la capacità di catturare e usare l’energia del Sole, rappresenta certamente il processo biologico fondamentale e unico dal quale
dipendono tutti gli organismi vivent
Morphology and development of secretory structures in Hypericum perforatum L. and Hypericum richeri Vill..
No full textToxins of Pseudomonas syringae pv. syringae affect H+-transport across the plasma membrane of maize
No full text
Borate and phosphite treatments of potato plants (Solanum tuberosum L.) as a proof of concept to reinforce the cell wall structure and reduce starch digestibility
No full textPotatoes are one of the main sources of carbohydrates in human diet, however they have a high glycaemic index (GI). Hence, developing new agricultural and industrial strategies to produce low GI potatoes represents a health priority to prevent obesity and related diseases. In this work, we investigated whether treatments of potato plants with elicitors of plant defence responses can lead to a reduction of tuber starch availability and digestibility, through the induction of cell wall remodelling and stiffening. Treatments with phosphites (KPhi) and borate were performed, as they are known to activate plant defence responses that cause modifications in the architecture and composition of the plant cell wall. Data of suberin autofluorescence demonstrated that potato plants grown in a nutrition medium supplemented with KPhi and borate produced tubers with a thicker periderm, while pectin staining demonstrated that KPhi treatment induced a reinforcement of the wall of storage parenchyma cells. Both compounds elicited the production of H2O2, which is usually involved in cell-wall remodelling and stiffening reactions while only KPhi caused an increase of the total content of phenolic compounds. A two-phase digestion in vitro assay showed that treatment with KPhi determined a significant decrease of the starch hydrolysis rate in potato tubers. This work highlights the ability of cell wall architecture in modulating starch accessibility to digestive enzymes, paving the way for new agronomic practices to produce low GI index potatoes
Prey killing by Eurasian kestrels: the role of the foot and the significance of bill and talons
No full textCorte costituzionale italiana y doctrina de los contralímites: el (dificil) camino hacia una plena integración jurídica europea = Italian constitutional Court and the counter-limits doctrine: the (difficult) path towards a full legal European integration
No full textThe present essay aims at analysing the development of the integration process between the legal and judicial systems of Italy and the European Union, especially looking at the building of a dialogue in which the main Courts of both institutional realities should play a decisive role. An initial glance will be drawn on the controversial origins of the relation between the Court of Justice of the European Union (CJEU) and the Italian Constitutional Court (ICC), looking at some important judgements that have been pronounced in this context (particularly, Simmenthal of the CJEU and Granital of the ICC). Then, some attention will be given to the birth of the counter-limits doctrine in the jurisprudence of the ICC and the influence it had (and could have) on a new legal order that binds together national constitutionalism and fundamental principles of EU law. Finally, moving from a short analysis of the Taricco case(s), the author will try to understand how far the interrelation between Italian and EU judicial systems has gone, dealing with a contemporary reality where the idea of a united Europe seems threatened by the rise of nationalism and populism.El presente articulo tiene como objetivo reflexionar sobre el desarrollo del proceso de integración entre los ordenamientos jurídicos italiano y europeo, en particular a través de la construcción de un diálogo – no siempre fácil y distendido – que asuma como protagonistas las respectivas instituciones jurisdiccionales. Por esta razón, en primer lugar se abordarán los conflictivos orígenes de la relación entre el Tribunal de Justicia de la Comunidad/Unión europea y la Corte costituzionale, recordando en breve algunas sentencias fundamentales (Simmenthal del TJUE y Granital de la Corte). A seguir, se prestará atención a la elaboración conceptual de la teoría de los contralímites por parte del Juez constitucional italiano y a la influencia de la misma en la plasmación de un (nuevo) orden jurídico integrado, que aglutine constitucionalismo “nacional” y principios supremos comunitarios. Finalmente, se tratarán los recientes acontecimientos de la “saga Taricco” para esbozar algunas consideraciones sobre el grado de compenetración hoy en día existente entre derecho italiano y derecho de la Unión europea, en un horizonte político-institucional general en el cual los cimientos de la unidad europea parecen tambalearse en favor de un aislamiento nacional (y nacionalista) cada vez más pronunciado
Il comportamento predatorio del gheppio (_Falco tinnunculus_)
No full textSono state condotte alcune osservazioni per analizzare in dettaglio la sequenza comportamentale adottata dal gheppio all'atto della predazione. Abbiamo rivolto l'attenzione soprattutto alla tecnica di cattura e uccisione della preda e alle cause della sua morte.
Il comportamento predatorio degli uccelli rapaci è stato, infatti, studiato estensivamente da vari punti di vista, ma poco è noto relativamente al "come" il rapace uccide la preda. Precedenti ricerche (Csermely et al., Boll. Zool. 56: 317, 1989; Csermely et al., Birds of Prey Bull. 4: 133, 1991; Csermely, Proc. Symp. "Biol. & Conserv. of Small Falcons", in stampa; Csermely, Boll. Zool. in stampa) avevano ripetutamente evidenziato l'uso di beccate inferte alla preda, soprattutto verso la regione cefalica, e l'apparente non utilizzo degli artigli, per cui era stato ipotizzato che la morte intervenisse più che altro per soffocamento.
Le prove presentate in questa occasione sono state effettuate in una situazione di laboratorio, utilizzando 7 individui selvatici ospitati temporaneamente presso il "Centro Recupero Rapaci" di Parma, gestito dalla L.I.P.U. I gheppi sono stati provati tutti al termine del periodo di riabilitazione, cioè subito prima della liberazione, in modo da ottenere anche informazioni utili circa la loro potenziale efficienza predatoria, una volta riportati alla libertà
Myocardial blood flow reserve and absolute myocardial blood flow for the assessment of patients with coronary artery disease with or without microvascular dysfunction
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