1,722,561 research outputs found
Testimoniar la prisión política argentina: relatos de un retorno
No full textEn 1974 en Bahía Blanca Iginio Roberto Calamita, estudiante, militante frentista del FAS-PRT, fue detenido. Su prisionía política duró siete años, luego fue liberado con obligación de firma semana y aproximadamente un año después pudo irse a Italia, país de origen de su familia, donde todavía reside. Muchos años después, pero con un principio embrional desarrollado en la misma prisión, empezó a escribir relatos testimoniales. En este artículo se mencionan y se describen todos sus relatos inéditos, que enfocan la memoria y la postmemoria, y se da a conocer uno que en realidad es una versión condensada de otro, elaborada en esta nueva forma a partir del diálogo entre Calamita y Ripa y presentada en un congreso internacional sobre literatura testimonial de 2021
A FEM numerical modelling of the polyphase inversion tectonics in Central Apennines (Italy)
No full textThe Central Apennines is an arcuate fold and thrust belt, characterized by NNE-SSW oblique thrust ramps like the Olevano-Antrodoco-Sibillini and the Sangro-Volturno, strongly influenced by the Mesozoic paleomargin architecture (e.g., Satolli & Calamita, 2008 and references therein). These oblique thrust ramps sign the separation of the Central Apennines respectively (Boccaletti et alii, 2005). The reconstructed 3D geological inversion tectonics model has been tested through numerical modelling which can evaluate well-or mis oriented pre-existing faults respect to the new compressive and extensional tectonic phases that interested the Apennine chain during the Neogene-Quaternary tim
Brittle‐ductile shear zones along inversion‐related frontal and oblique thrust ramps: Insights from the Central–Northern Apennines curved thrust system (Italy)
No full textHigh‐strain deformation within the Earth’s crust often occurs in localized, narrow, and sub‐parallel wall‐sided zones known as shear‐zones, which accommodate differential movement during the deformation of the lithosphere. They may be related to any tectonic regime (compression, extension, or strike–slip), varying in width from microns/millimeters (grain‐scale) to kilometers (mega‐shears). The heterogeneous character of natural deformation in shear zones produces characteristic fault rocks as mylonites and cataclasites, developedunder deep‐seated (10–25km deep) ductile (viscous) or shallow‐crustal (0–15km deep) brittle–ductile (frictional–viscous) deformation regimes, respectively (e.g. Ramsay and Graham 1970; Sibson 1977, 1983; Ramsay 1980; Alsop and Holdsworth 2004). The analysis of brittle–ductile and ductile shear zones exhumed and/or extruded and exposed at the surface through a variety of approaches and across a range of scales is essential for unraveling deformation
histories. Deciphering the kinematic significance of deformation fabrics within fault rocks and reconstructing the regional tectonics contribute profoundly to understand how localized crustal deformation occurs (e.g. Casas and Sàbat 1987; Alsop et al. 2004; Carosi et al. 2004; Iacopini et al. 2008; Mukherjee 2007, 2010a,b, 2011, 2013a, b, c, 2014a, b; Mukherjee and
Koyi 2010a,b; Calamita et al. 2012a; Tesei et al. 2013). In this chapter the geometric and kinematic characteristics of shear deformation fabrics associated with frontal and oblique ramps belonging to curve‐shaped thrusts are described. A detailed mesoscale structural and kinematic analysis is presented by examining some remarkable examples of brittle–ductile thrust shear zones related to regional‐scale frontal and oblique thrust ramps in the Central–Northern Apennines of Italy
Foreword of the special issue on Alps and Apennines: a natural laboratory for Structural Geology and Geodynamics
No full textAssignment of the Aquaporin-8 water channel gene (AQP8) to human chromosome 16p12
No full textAquaporins represent water channel proteins widely spread
throughout nature where they are responsible for the high water
permeability characterizing numerous plasma membranes
(Agre, 1998). A number of aquaporins have been described in
mammals where their sites of expression predict roles in physiology
and disease (Agre et al., 1998). Some of these functions
have been already demonstrated (see Agre et al., 1998 for references).
Interest is triggered by the recent discovery of the Aquaporin-
8 water channel (AQP8) in rat (Ishibashi et al., 1997;
Koyama et al., 1997), mouse (Ma et al., 1997) and human
(Koyama et al., 1998) tissues where its distribution predicts
roles in secretion of pancreatic juice, bile and primary saliva,
fecal dehydration, transport of fluid across placenta, and in the
movement of water across the spermatozoa plasma membrane.
An involvement of AQP8 in clinical disorders of unknown
molecular origin is also expected. In agreement with phylogenetic
analyses, the genomic organization of the AQP8 gene
indicates a separate evolutionary pathway for AQP8 compared
to that of the other mammalian aquaporins (Koyama et al.,
1998; Calamita et al., submitted for publication). This distinction
may be responsible for regulatory and functional features
which could still be unknown at the present. Uncertain is the
assumption that the mouse, rat and human AQP8 are orthologous
to each other. Here we report the fine mapping of the AQP8 gene to human chromosome 16p12, a region which is
syntenic to the region where the mouse AQP8 gene maps (Calamita
et al., submitted for publication). This result demonstrates
that the mouse and human AQP8 genes are orthologous
and provides important insight into the phylogenesis of the
aquaporins
Understanding microbial MIP channels
No full textThe microbial members of the MIP
family of transmembrane channel
proteins are attracting considerable
interest, and a topical review of their
structural and biological features was
provided recently by Hohmann et al.1
MIP proteins are widely distributed
throughout nature. Already, 220
MIP family members, including 74 of
microbial origin, have been identified
and partially characterized; many
more will be identified as a result of
genome sequencing. In spite of their
2.5–3 billion years of evolutionary
history, microbial MIP proteins
are structurally similar to their
invertebrate and vertebrate
counterparts2. However, unlike MIP
proteins from higher organisms, the
linear sequences of which permit us
to distinguish homologues highly
selective for water (aquaporins, AQP)
and homologues permeable to
glycerol and other small neutral
solutes in addition to water
(aquaglyceroporins3), the correlation
between sequence and functional
properties of microbial MIPs has
not yet been fully assessed
E. calamita Guadarrama
No full textGenetic dataset in Genepop format including 652 tadpole samples of Epidalea calamita, from 21 populations located across Sierra de Guadarrama (Central Spain), genotyped at 16 microsatellite loci
Microsatellite genotypes of Epidalea calamita
No full textDNA microsatellite genotypes of tadpoles and adult males and females of Epidalea calamita. The sizes of the alleles (in base pairs) of each individual at 16 loci are written in a single row. Missing data are coded as '0'
Microsatellite and mtDNA genotypes for Bufo calamita
No full textPopulation coordinates and microsatellite and mtDNA genotypes for five populations of the natterjack toad (Bufo calamita). Location : France
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