170,518 research outputs found
Emerging Diplomatics Studies. I, Atti del convegno internazionale (Milano, 30 giugno - 1 luglio 2022), a cura di P. Buffo - G. Capriolo - C. Drago Tedeschini - M.L. Mangini - M. Modesti - V. Ruzzin
No full textAtti della prima edizione del convegno internazionale EDIS. Emerging DIplomatics Studies (30 giugno – 1° luglio 2022, Università degli Studi di Milano Statale) promosso dal Centro Studi Interateneo Notariorum Itinera con il contributo dei progetti di ricerca LIMEN. Linguaggi della mediazione notarile (secc. XII-XV) Seal of Excellence del Bando Straordinario per
Progetti Interdipartimentali dell’Università degli Studi di Milano 2020 e NOTMed. El notariat pùblic en la Mediterrània Occidental: escriptura, institucions, societat i economia, segles XIII-XV dell’Universidad de Barcelona e con il patrocinio della Commission Internationale de Diplomatique e dell’Associazione Italiana dei Paleografi e Diplomatisti
Carex modesti (Cyperaceae), a new species from southern Tanzania
No full textA new species of Carex (Cyperaceae), Carex modesti, is described from southern Tanzania. It grows on stream sides and peat bogs at about 2750 m in the Kitulo Plateau. It is morphologically distinct from the similar species C. vallis-rosetto by its creeping rhizomes, coriaceous leaves and solitary spikes arising in each node.
Carex modesti is included in Carex sect. Spirostachyae subsect. Elatae together with other Carex species from the tropical African mountains
Social capital and plural identities in migrants and refugees: between diasporas and entrepreneurship
No full textResearches in the field of migration have highlighted the different roles played by the communities of origin and the ones of resettlement in the purpose of promoting newcomers’ social integration (Erikkson et al. 2018; Bereins et al. 2007; Calhoun 2010). In particular identity - defined as “the product of the relationship among different actors (people, organizations, artefacts, speeches) along axes of self and hetero-recognition and through various ontological dimensions (individual, professional, national and organizational ethnic” (Talamo, Roma, 2007 pp. 14) - is pivotal in the attempt of understanding how social capital is exploited in the integration process. Social relationships, distinguished on the basis of the social identity category, produce three types of social capital: the bonding, bridging and linking social capital (Putnam, 1999; Sretzer, Woolcock, 2004). The present study has involved migrant and refugee business people that, beside being part of national diasporas, have started enterprises aimed at fostering newcomers’ social capital. In order to explore participants’ plural identities, narrative interviews have been carried out together with a questionnaire aimed at analysing their (social) ego network. Preliminary results have shown that the experiences participants have made in the field of diasporas and entrepreneurship modulates the creation and exploitation of bonding, bridging and linking social capital. Results will be discussed according to the current theories on social capital and plural identities
A common repertoire of autoantibodies is shared by cancer and autoimmune disease patients: Inflammation in their induction and impact on tumor growth
No full textThe repertoire of autoantibodies found in cancer patients partly overlaps with that typical of patients with autoimmune diseases. Beside the biochemical and immunological properties of the target antigens and their altered expression in tumor tissues, the intratumoral inflammatory context can play a key role in the induction of autoimmune disease-associated autoantibodies in cancer patients. Furthermore, the impact of such antibodies on cancer growth and progression can be deeply influenced by the interplay with inflammation. The characterization of the spontaneous humoral responses occurring in cancer patients, of the mechanisms that trigger and sustain the autoantibody response and of the biological effects of such autoantibodies may help the rational design of anti-cancer immunotherapeutic protocols
Breaking of ground-state symmetry in core-excited ethylene and benzene
No full textThe observation of C-H bending, and C-C and C-H stretching vibrational levels in high-resolution C 1s-1π* photoabsorption spectra of ethylene and benzene demonstrates that, within the validity of the Franck-Condon principle, both molecules have broken symmetry in this core-excited state. A simple model based on the antibonding character of the π* electron, and on the local rehibridization of the bonding orbitals on the excited C atom, is utilized to explain our observations and to show that both core-excited molecules become nonplanar. Our results also show that the core hole is localized on the excited carbon atom
Novel Features of Potassium and Sodium Vibrations on Copper Surfaces Observed by High-Resolution Electron-Energy-Loss Spectroscopy
No full textHigh-resolution electron-energy-loss spectra of alkali metals adsorbed on Cu show three unexpected features: the adsorbate-substrate stretching frequency does not change with coverage, within 1 meV on Cu(111) and Cu(110), in agreement with the covalent picture of chemisorption; the spectra show an unusual overtone which is interpreted as a consequence of a strongly non linear relationship between the surface dipole moment and the adsorbate-substrate distance; the dynamical dipole moment is strongly coverage dependent.
The interaction of tenascin-C with fibronectin modulates the migration and specific metalloprotease activity in human mesothelioma cell lines of different histotype
No full textMalignant mesothelioma (MM) is a tumor with local invasive behaviour. Tenascin-C (TN-C) with fibronectin (FN) are associated extracellular matrix (ECM) molecules frequently neo-expressed in stromal remodeling during neoplastic progression, mostly at the invasive edge of these tumors. Tenascin-C alone or in association with other ECM molecules, could play an important role in the process of tumor invasion, acting as substrate for movement or modulating the migration on FN or promoting the degradation of ECM. Three mesothelioma cell lines of different histotype were analysed for the adhesive capacity on TN-C. The haptotactic activity on TN and the TN modulation of migration on a substrate of FN were analysed by a Boyden modified chamber. The effects of TN on proteolytic activity was evaluated by zymography. None of the lines adhered to tenascin. TN-C was not haptotactic for the three cell lines. Soluble or solid TN reduced the migration on FN of epithelial (E-MM) and sarcomatous cell line (S-MM), whereas enhanced the movement of a byphasic cell line (B-MM). When the cells were pretreated with anti-integrin blocking antibodies we observed a different pattern of inhibition of migration on FN respect to FN plus TN. Finally, no difference of metalloprotease (MMP-2, MMP-3, MMP-7, MMP-9) activity was observed between cells plated on FN and on FN plus TN, except for B-MM which showed an increased MMP-7 activity when TN was added to FN. Although TN is not a substrate for movement of MM cell lines, it interacts with FN by modulating differently the migration, according to the different histotype and to the integrin involved, and increasing specific metalloprotease activity
doc. 3 - Arezzo, Archivio Capitolare, Canonica n. 9; doc. 4 - Arezzo, Archivio Capitolare, Canonica n. 10
No full textNell'ambito dell'edizione critica dei documenti pubblici e privati datati o databili al secolo IX conservati presso l'Archivio Capitolare di Arezzo, il contributo ha ad oggetto l'edizione critica di due diplomi imperiali di Ludovico il Pio, concessi il primo alla Chiesa di Arezzo, il secondo al conte aretino Aganone e databili entrambi all'819, dei quali a tutt'oggi non esiste ancora una edizione recente e aggiornata, nemmeno nella serie degli MGH.
Di tali documenti si fornisce qui l’edizione critica accanto alla riproduzione fotografica dell'originale, corredata da un’ampia analisi paleografica, dalla discussione cronologica e dall'esame diplomatistico utile a verificare la genuinità del pezzo, oltre alle informazioni di carattere archivistico
La misteriosa scrittura grande dei papiri ravennati, tra prassi documentaria pubblica e legislazione
No full textNel 1952 Jan Olof Tjäder riusciva finalmente a decifrare la cosiddetta 'misteriosa scrittura grande' che caratterizza la prima riga di quattro papiri ravennati contenenti protocolli dei 'gesta municipalia' (504-625 d. C.) e a individuarne la base grafica nella corsiva romana antica. Lo studioso dimostrava così che l’antica scrittura comune romana non era sopravvissuta, dopo il IV secolo, solo nelle 'litterae caelestes' riservate ai documenti imperiali (cfr. Th.9.19.3), ma che ad esse si affiancavano anche le scritture iniziali di alcuni papiri egiziani contenenti processi verbali d’udienza già segnalati dal Marichal e, appunto, quella dei protocolli dei gesta ravennati.
Il contributo si propone dunque una verifica della teoria del Tjäder circa il ruolo che la misteriosa scrittura grande ravennate ha avuto nella storia della scrittura latina, alla luce delle più recenti edizioni di fonti e degli studi successivi sul tema. Quindi si è tentato di riconnettere il dato grafico che emerge dai gesta ravennati e dai processi verbali egiziani ad un quadro storico-istituzionale più ampio attraverso il confronto tra le fonti documentarie, le fonti legislative (relativamente a quegli interventi normativi che interessano direttamente la scrittura dei documenti pubblici) e la storiografia di carattere paleografico. In particolare si è cercato di rispondere ad alcuni interrogativi: che cosa rappresenta sul piano storico-giuridico la misteriosa scrittura grande ravennate? Quali rapporti si possono istituire tra essa, la legislazione e la prassi documentaria pubblica?
Tre, in questa prospettiva, le direttrici di approfondimento: 1) quella del rapporto tra le scritture iniziali dei papiri ravennati ed egiziani e la costituzione di Valentiniano e Valente del 367 d.C. (Th.9.19.3) che riservava agli scrinia imperiali l’uso delle 'litterae caelestes', vietandolo alle cancellerie minori e provinciali e all’uso privato; 2) quella del rapporto con la Nov. 44.2 del 536 e la Nov. 47 del 537 d.C. di Giustiniano; 3) quella del valore e della funzione di tali scritture speciali.
La responsabilità scientifica del lavoro è così suddivisa:
- L. Iannacci: 3. Scritture iniziali e legislazione
- M. Modesti: 1. Introduzione; 4. Conclusioni
- A. Zuffrano: 2. Considerazioni paleografich
- …
