Search results for "Culturali"
showing 10 items of 2081 documents
SYNCRETISM OF THE SEASONAL RITUALS IN THE LATGALIAN BORDERLAND
2010
<p>German written sources are representing information on masquerade traditions in Latvia already in the 17th century - Latvian mask parades in 1636 are described by the Kurzeme and Zemgale Superintendent, P. Einhorn. (Jansons 2010: 49). Information about the Latvian masquerade traditions from the Christian Church sources in the nineteenth century and at the beginning of the twentieth century have been negative, which is analyzed in 30-ties of the 20th century by ethnologist Jānis Alberts Jansons in his work "The Latvian mask parades”, but through a field study at the beginning of 21st century conclusion can be drawn that these traditions have been explicitly significant within the ru…
Intervención de José Vidal-Beneyto en el debate sobre “Difference in thinking today”
2002
Versión en inglés de las intervenciones de José Vidal-Beneyto en el debate "La diferencia hoy pensada : El comienzo de la historia" [En: Portella, Eduardo (Dir.) (2000). Caminos del pensamiento: hacia nuevos lenguajes (pp. 111-112 ; 125 ; 131-132; 135 ; 146-149; 294). París: Ediciones UNESCO - La biblioteca del filósofo.]. Disponible también la versión francesa en: En: Portella, Eduardo (Dir.) (2000). Chemins de la pensée : vers de nouveaux langages (pp. 111-112; 125-126; 132; 135; 147-149; 296). Paris: Éditions UNESCO - La bibliothèque du philosophe.
Intervenciones de José Vidal-Beneyto en el debate "La diferencia hoy pensada : El comienzo de la historia"
2000
Versión en español de las intervenciones de José Vidal-Beneyto en el debate "La différence aujourd’hui pensée : le début de l’histoire" [En: Portella, Eduardo (Dir.) (2000). Chemins de la pensée : vers de nouveaux langages (pp. 111-112; 125-126; 132; 135; 147-149; 296). Paris: Éditions UNESCO - La bibliothèque du philosophe.]. Disponible también la versión inglesa en: Portella, Eduardo (Dir.) (2000). Thinking at crossroads: in search of new languages (pp. 109, 110, 121, 122, 127, 128, 131, 141-144 y 281). París: UNESCO Publishing - The Philosopher's Library.
Intervenciones de José Vidal-Beneyto en el debate "La différence aujourd’hui pensée : le début de l’histoire"
2000
Versión en francés de las intervenciones de José Vidal-Beneyto en el debate "La diferencia hoy pensada : El comienzo de la historia" [En: Portella, Eduardo (Dir.) (2000). Caminos del pensamiento: hacia nuevos lenguajes (pp. 111-112 ; 125 ; 131-132; 135 ; 146-149; 294). París: Ediciones UNESCO - La biblioteca del filósofo.]. Disponible también la versión inglesa en: Portella, Eduardo (Dir.) (2000). Thinking at crossroads: in search of new languages (pp. 109, 110, 121, 122, 127, 128, 131, 141-144 y 281). París: UNESCO Publishing - The Philosopher's Library.
Studio della cinetica di assorbimento di fluidi in mezzi porosi tramite Imaging a Risonanza Magnetica Nucleare
2007
In questo lavoro, la tecnica di Imaging a Risonanza magnetica Nucleare (MRI) è stata impiegata per studiare in modo quantitativo, non invasivo, non distruttivo, la cinetica di assorbimento capillare di acqua in campioni di Pietra di Lecce, una biocalcarenite omogenea nella quale il fronte di bagnamento avanza pressoché piatto. MRI permette di misurare in funzione del tempo l’altezza raggiunta dal fronte in qualunque sezione interna del campione. Al fine di studiare l’anisotropia del fenomeno dovuta ad eventuali strati sedimentari, alcuni esperimenti sono stati effettuati variando l’asse principale di assorbimento (ortogonale al piano dove avviene l’assorbimento) attraverso la semplice rotaz…
Glucagon fibril polymorphism reflects differences in protofilament backbone structure
2010
Amyloid fibrils formed by the 29-residue peptide hormone glucagon at different concentrations have strikingly different morphologies when observed by transmission electron microscopy. Fibrils formed at low concentration (0.25 mg/mL) consist of two or more protofilaments with a regular twist, while fibrils at high concentration (8 mg/mL) consist of two straight protofilaments. Here, we explore the structural differences underlying glucagon polymorphism using proteolytic degradation, linear and circular dichroism, Fourier transform infrared spectroscopy (FTIR), and X-ray fiber diffraction. Morphological differences are perpetuated at all structural levels, indicating that the two fibril class…
Conformational substates of ferricytochrome c revealed by combined optical absorption and electronic circular dichroism spectroscopy at cryogenic tem…
2010
We have investigated the heterogeneity of the Fe(III)–Met80 linkage of horse heart ferricytochrome c by probing the 695 nm charge transfer band with absorption and electronic circular dichroism (ECD) spectroscopy. In order to verify the connection between conformational substates of the Fe(III)–Met80 linkage and the 695 nm band spectral heterogeneity, we have performed experiments as a function of pH (neutral and acidic) and temperature (room and 20 K). At room temperature, the ECD spectrum is blue shifted with respect to the absorption one; the shift is more pronounced at acidic pH and is compatible with the presence of sub-bands. ECD measurements at 20 K highlighted the heterogeneous natu…
Bovine Serum Albumin protofibril-like aggregates formation: Solo but not simple mechanism
2011
We report an experimental study on the model protein Bovine Serum Albumin (BSA), with the aim of elucidating the mechanisms by which a fully folded globular protein undergoes different aggregation pathways leading to the formation of amyloid fibrils or amorphous aggregates. We observe thermally induced formation of fibrillar structures at pH far from the protein isoelectric point. The increase of electrostatic repulsion results in protein destabilization and in modifications of inter and intra-molecular interactions leading to the growth of fibril-like aggregates stabilized by inter-molecular-β sheets. The aggregation kinetics is studied by means of fluorescence techniques, light scattering…
Existence of metastable intermediate lysozyme conformation highlights the role of alcohols in altering protein stability.
2011
Alcohols have a manifold effect on the conformational and thermodynamic stability of native proteins. Here, we study the effect of moderate concentrations of trifluoroethanol (TFE) on the thermal stability of hen egg-white lysozyme (HEWL), by far-UV circular dichroism and by steady-state and time-resolved photoluminescence of intrinsic tryptophans. Our results highlight that TFE affects lysozyme stability by preferential solvation of the protein molecule. Furthermore, we discovered the existence at 20% TFE of an equilibrium partially folded state of lysozyme, intermediate between the native and the unfolded state. A three-state model is therefore used to interpolate the thermal denaturation…
Two Latent and Two Hyperstable Polymeric Forms of Human Neuroserpin
2010
AbstractHuman neuroserpin (hNS) is a serine protease inhibitor that belongs to the serpin superfamily and is expressed in nervous tissues. The serpin fold is generally characterized by a long exposed loop, termed the reactive center loop, that acts as bait for the target protease. Intramolecular insertion of the reactive center loop into the main serpin β-sheet leads to the serpin latent form. As with other known serpins, hNS pathological mutants have been shown to accumulate as polymers composed of quasi-native protein molecules. Although hNS polymerization has been intensely studied, a general agreement about serpin polymer organization is still lacking. Here we report a biophysical chara…