Le determinanti degli investimenti diretti esteri in Italia nel settore agroalimentare

Gli investimenti diretti esteri (IDE) giocano un ruolo importante nella crescita economica e nello sviluppo territoriale. Con il notevole aumento dei flussi IDE nel settore agroalimentare a livello mondiale l’attenzione si è concentrata sul dibattito relativo alle determinanti che spingono alla scelta di un territorio piuttosto che un altro. Non esiste ancora un lavoro definitivo ed univoco sulle determinanti degli IDE. Alcune delle più frequenti analisi sui fattori che influenzano gli IDE includono: l’entità del mercato, il costo del lavoro, i tassi di interesse, le barriere protezionistiche, tassi di cambio, predisposizione all’export, struttura del mercato, distanze geografiche, stabilità politica e affinità culturale. Questo lavoro si propone di analizzare le determinanti nel settore agroalimentare italiano sia teoricamente che empiricamente. A questo scopo è stata applica come base teorica il paradigma OLI di Dunning e i principi legati agli investimenti orizzontali al settore agroalimentare regionale italiano. Sono state esaminate le determinanti degli investimenti diretti inward in questo settore. Le risultanti suggeriscono una relazione positiva tra la presenza di attività di servizi e la presenza di IDE nelle diverse Regioni. In un Paese ad economia avanzata come l’Italia, strategie territoriali e di impresa basate sui costi e sul mercato non sono caratterizzanti per attrarre multinazionali straniere, mentre la dotazione di servizi e infrastrutture rappresentano un nuovo obiettivo su cui le Regioni devono puntare per aprire i territori alle sfide della globalizzazione. Questa ricerca unisce analisi statistica ed econometria e studio bibliografico per approfondire e comprendere la materia in oggetto e fornire nuovi elementi e spunti su cui discutere.

Studio immunologico per l'individuazione di pazienti trapiantati per cirrosi HBV relata che potrebbero sospedere la terapia con immunoglobine specifiche (HBIG)

Hepatitis B virus (HBV) recurrence after orthotopic liver transplantation (OLT) is associated with poor graft and patient survival. Treatment with HBV-specific immunoglobulins (HBIG) in combination with nucleos(t)ide analogs is effective in preventing HBV reinfection of the graft and improving OLT outcome. However, the combined immunoprophylaxis has several limitations, mainly the high cost and the lack of standard schedules about duration. So far, the identification of markers able to predict the reinfection risk is needed. Although the HBV-specific immune response is believed to play an essential role in disease outcome, HBV-specific cellular immunity in viral containment in OLT recipients is unclear. To test whether or not OLT recipients maintain robust HBV-specific cellular immunity, the cellular immune response against viral nucleocapsid and envelope-protein of HBV was assessed in 15 OLT recipients and 27 individuals with chronic and 24 subjects with self-limited HBV infection, respectively. The data demonstrate that OLT recipients mounted fewer but stronger clusters of differentiation (CD)8 T cell responses than subjects with self-limited HBV infection and showed a preferential targeting of the nucleocapsid antigen. This focused response pattern was similar to responses seen in chronically infected subjects with undetectable viremia, but significantly different from patients who presented with elevated HBV viremia and who mounted mainly immune responses against the envelope protein. In conclusion, virus-specific CD4 T cell–mediated responses were only detected in subjects with self-limited HBV infection. Thus, the profile of the cellular immunity against HBV was in immune suppressed patients similar to subjects with chronic HBV infection with suppressed HBV-DNA.

Survey on the spirilar flora of Lagomorphs

Members of the genera Campylobacter and Helicobacter have been in the spotlight in recent decades because of their status as animals and/or humans pathogens, both confirmed and emerging, and because of their association with food-borne and zoonotic diseases. First observations of spiral shaped bacteria or Campylobacter-like organisms (CLO) date back to the end of the 19th century, however the lack of adequate isolation methods hampered further research. With the introduction of methods such as selective media and a filtration procedure during the 1970s led to a renewed interest in Campylobacter, especially as this enabled elucidation of their role in human hosts. On the other hand the classification and identification of these bacteria was troublesome, mainly because of the biochemical inertness and fastidious growth requirements. In 1991, the taxonomy of Campylobacter and related organisms was thoroughly revised, since this revision several new Campylobacter and Helicobacter species have been described. Moreover, thanks to the introduction of a polyphasic taxonomic practice, the classification of these novel species is well-founded. Indeed, a polyphasic approach was here followed for characterizing eight isolates obtained from rabbits epidemiologically not correlated and as a result a new Campylobacter species was proposed: Campylobacter cuniculorum (Chapter 1). Furthermore, there is a paucity of data regarding the occurrence of spiral shaped enteric flora in leporids. In order to define the prevalence both of this new species and other CLO in leporids (chapter 2), a total of 85 whole intestinal tracts of rabbits reared in 32 farms and 29 capture hares, epidemiologically not correlated, were collected just after evisceration at the slaughterhouse or during necroscopy. Examination and isolation methods were varied in order to increase the sensibility level of detection, and 100% of rabbit farms resulted positive for C. cuniculorum in high concentrations. Moreover, in 3.53% of the total rabbits examined, a Helicobacter species was detected. Nevertheless, all hares resulted negative both for Campylobacter or Helicobacter species. High prevalence of C. cuniculorum were found in rabbits, and in order to understand if this new species could play a pathological role, a study on some virulence determinants of C. cuniculorum was conducted (Chapter 3). Although this new species were able to adhere and invade, exert cytolethal distending toxin-like effects although at a low titre, a cdtB was not detected. There was no clear relationship between source of isolation or disease manifestation and possession of statistically significantly levels of particular virulence-associated factors although, cell adhesion and invasion occurred. Furthermore, antibiotic susceptibility was studied (chapter 4) in Campylobacter and in Escherichia coli strains, isolated from rabbits. It was possible to find acquired resistance of C. cuniculorum to enrofloxacin, ciprofloxacin and erytromycin. C. coli isolate was susceptible to all antimicrobial tested and moreover it is considered as a wild-type strain. Moreover, E. coli was found at low caecal concentration in rabbits and 30 phenotypes of antibiotic resistance were founded as well as the high rate of resistances to at least one antibiotic (98.1%). The majority of resistances were found from strains belonging to intensive farming system. In conclusion, in the course of the present study a new species isolated from rabbits was described, C. cuniculorum, and its high prevalence was established. Nevertheless, in hare samples no Campylobacter and Helicobacter species were detected. Some virulence determinants were further analyzed, however further studied are needed to understand the potential pathogenicity of this new species. On the other hand, antimicrobial susceptibility was monitored both in C. cuniculorum and indicator bacteria and acquired resistance was observed towards some antibiotics, indicating a possible role of rabbitries in the diffusion of antibiotic resistance. Further studies are necessary to describe and evaluate the eventual zoonotic role of Campylobacter cuniculorum.

La Ragione violenta di Ramiro Ledesma Ramos. Fascismo e pensiero conservatore in Spagna

Aunque esta tesis puede leerse desde diferentes perspectivas, tiene una voluntad fundamental: explicar, desde la metodología propia de la historia conceptual, la racionalidad específica del llamado fascismo español. Centra su interés en la figura de Ramiro Ledesma Ramos (1905-1936), fundador del primer movimiento fascista español. Ledesma ideó un proyecto de modernización de España que sólo podía pasar por la organización de un Estado total. Trató de crear un movimiento de masas de corte fascista con capacidad para fundar un Estado total capaz de ser una alternativa viable al liberalismo republicano y al socialismo. El fascismo español emergerá como una experiencia temporal propia de la modernidad. Buscará revitalizar y acelerar un proceso, el moderno, que a la luz de los jóvenes exaltados de principios de siglo se percibía como agotado y decadente. El planteamiento de Ledesma brotaba de la necesidad de combatir aquellas presuntas fuerzas degenerativas (liberalismo, comunismo, conservadurismo, etc.) de la historia contemporánea española para erigir una nueva modernidad basada en el renacimiento de la nación. Al mismo tiempo, se pretende poner en relieve la eficacia de la acción histórica planteada por el pensamiento reaccionario español. Bajo sus coordenadas, la nación jamás desarrollaría los rasgos sublimados de la política moderna europea. Jamás abandonó los pretendidos órdenes del derecho natural del clasicismo católico que, en última instancia, limitaban la potencia absoluta de cualquier soberano político. Esta particularidad histórica, arrastrada desde la primera modernidad, impedirá con obstinación cualquier oleada revolucionaria que supusiera la autonomización de la esfera política y por tanto, la instauración de un poder totalitario. De hecho, cuando se instauré la dictadura del Franco, a lo más que se llegaría, sería a un Estado mínimo, que bajo los presupuestos del tradicionalismo, dejaba a su suerte las dinámicas económicas.

La ville comme labyrinthe: réécritures d'un mythe entre les années 1950 et 1980

Entre les années 1950 et 1980, émerge une nouvelle forme de labyrinthe chez des romanciers européens comme Michel Butor, Alain Robbe-Grillet, Italo Calvino, Patrick Modiano et Alasdair Gray : un labyrinthe insaisissable et non cartographiable. Pour en rendre compte nous avons recours au modèle du rhizome, issu de la philosophie de Gilles Deleuze et de Félix Guattari, aussi bien qu'au concept d'hétérotopie de Michel Foucault. La spatialité de nos romans nous pousse à prendre en compte également les réécritures ironiques du mythe de Thésée, Ariane, le Minotaure, Dédale. Les citations et les allusions au mythe nous font remarquer la distance d'avec le modèle traditionnel et les effets de ce qu'on peut considérer comme un « bricolage mythique », dans le cadre d'un regard ironique, parodique ou satirique. La représentation romanesque du labyrinthe accentue d'un côté l'absence d'un centre, et de l'autre côté l'ouverture extrême de cet espace qu'est la ville contemporaine. En même temps, la présence de nombreux « espaces autres », les hétérotopies de Foucault, définit l'égarement des protagonistes des romans. Au fur et à mesure que les écrivains acquièrent conscience des caractéristiques « labyrinthiques » de ces espaces, celles-ci commencent à informer l'œuvre romanesque, créant ainsi un espace métafictionnel. Entre les années Cinquante et le début des années Soixante-dix, les Nouveaux romanciers français accentuent ainsi l'idée de pouvoir jouer avec les instruments de la fiction, pour exaspérer l'absence d'un sens dans la ville comme dans la pratique de l'écriture. Calvino reformule cette conception du roman, remarquant l'importance d'un sens, même s'il est caché et difficile à saisir. Pour cette raison, à la fin de l'époque que nous analysons, des auteurs comme Modiano et Gray absorbent les techniques d'écriture de ces prédécesseurs, en les faisant jouer avec la responsabilité éthique de l'auteur.

Stile. Teoria e prassi nell'opera di Viollet-le-Duc

Per Viollet-le-Duc lo “stile” «è la manifestazione di un ideale fondato su un principio» dove per principio si intende il principio d’ordine della struttura, quest’ultimo deve rispondere direttamente alla Legge dell’”unità” che deve essere sempre rispettata nell’ideazione dell’opera architettonica. A partire da questo nodo centrale del pensiero viollettiano, la presente ricerca si è posta come obiettivo quello dell’esplorazione dei legami fra teoria e prassi nell’opera di Viollet-le-Duc, nei quali lo “stile” ricorre come un "fil rouge" costante, presentandosi come una possibile inedita chiave di lettura di questa figura protagonista della storia del restauro e dell’architettura dell’Ottocento. Il lavoro di ricerca si é dunque concentrato su una nuova lettura dei documenti sia editi che inediti, oltre che su un’accurata ricognizione bibliografica e documentaria, e sullo studio diretto delle architetture. La ricerca archivistica si é dedicata in particolare sull’analisi sistematica dei disegni originali di progetto e delle relazioni tecniche delle opere di Viollet-le- Duc. A partire da questa prima ricognizione, sono stati selezionati due casi- studio ritenuti particolarmente significativi nell’ambito della tematica scelta: il progetto di restauro della chiesa della Madeleine a Vézelay (1840-1859) e il progetto della Maison Milon in rue Douai a Parigi (1857-1860). Attraverso il parallelo lavoro di analisi dei casi-studio e degli scritti di Viollet- le-Duc, si è cercato di verificare le possibili corrispondenze tra teoria e prassi operativa: confrontando i progetti sia con le opere teoriche, sia con la concreta testimonianza degli edifici realizzati.