Search results for "centri"

Observations on ant-plant interactions in Pachycentria and other genera of the Dissochaeteae (Melastomataceae) in Sabah and Sarawak

1998

Summary In Sabah and Sarawak (Malaysia) ant-plant interactions of Dissochaeteae were studied in the field. Whereas some species of Dissochaeteae show only loose and fortuitous interactions with ants as the result of the provision of pearl bodies and nesting places which are used by ants facultatively, Pachycentria constricta and P. glauca show a complex relationship with ants mediated by other ant plants. Both species provide pearl bodies and potential nesting space or shelter for ants in dried out and hollow root swellings. The main characteristic which differentiates them from all other Melastomataceae interacting with ants are their particular seeds which are attractive to ants and carri…

Metamorfosi panormita, tra aree di “bordo” e baricentri urbani. Economie insorgenti e disegno di città

2011

La città di Palermo guardata nel suo complesso, ponendo lo sviluppo attuale in relazione con le componenti storiche, sia a livello della pianificazione e delle occasioni mancate, sia rispetto alle vicende storiche che l'hanno riguardata. Particolare attenzione viene data, in questo saggio, alla struttura complessiva della città, alle sue interconnessioni e alla presenza di alcuni grandi elementi, come i centri commerciali, che fungono da detrattori.

Economie insorgenti e disegno di città, tra aree di "bordo" e baricentri urbani

2012

Nel quadro irrisolto della pianificazione palermitana, il contributo analizza il fenomeno dei centri commerciali, inseriti in un excursus storico, esplorando le trasformazioni urbane, la localizzazione e gli effetti indotti dai centri commerciali, non osservati solo come “oggetti urbani”, ma come strumenti di potere politico e luoghi che possono essere definiti “falsi vettori dello sviluppo”, dove si declina una differente modalità di consumo.

Solutions of elliptic equations with a level surface parallel to the boundary: stability of the radial configuration

2016

A positive solution of a homogeneous Dirichlet boundary value problem or initial-value problems for certain elliptic or parabolic equations must be radially symmetric and monotone in the radial direction if just one of its level surfaces is parallel to the boundary of the domain. Here, for the elliptic case, we prove the stability counterpart of that result. We show that if the solution is almost constant on a surface at a fixed distance from the boundary, then the domain is almost radially symmetric, in the sense that is contained in and contains two concentric balls $${B_{{r_e}}}$$ and $${B_{{r_i}}}$$ , with the difference r e -r i (linearly) controlled by a suitable norm of the deviation…

Sudden death in water: Diagnostic challenges

2016

Abstract The authors report a case of sudden death in a breath-holding diver and highlight the forensic diagnostic difficulties in opining the cause of sudden death in water. The autopsy showed increased thickness of the left ventricular wall with a distinct pattern of concentric hypertrophy, evident particularly in the subaortic interventricular septum. Histological examination revealed diffuse interstitial fibrosis and associated findings of multifocal myocyte disarray especially evident in the subaortic interventricular septum. The analysis and discussion of this case made it possible to attribute sudden death to a lethal arrhythmia following myocyte disarray and hypoxia caused by breath…

Centrifugal necrotic keratoacanthoma

2007

Centrifugal necrotic keratoacanthoma is a quite rare variant of keratoacanthoma, with a locally aggressive behavior and no tendency to spontaneous involution. We report a typical case of the nasal-orbital region. Based on its clinical, histological and behavioral picture, centrifugal necrotic keratoacanthoma appears as variant of giant keratoacanthoma and can be regarded as an intermediate form in a spectrum where keratoacanthoma and overt squamous cell carcinoma represent the most benign and the most malignant end, respectively, as also highlighted by analogies between the two lesions recently reported in the field of molecular biology.

Conoscenza del patrimonio costruito

2010

Conoscenza del patrimonio costruito. Sistemi, elementi, interventi

2010

Si illustrano gli esiti del lavoro svolto dal gruppo di Palermo nell’ambito del workshop organizzato dal Dipartimento di Tecnologie per l’ambiente Costruito dell’Università di Pescara e dalla SITdA allo scopo di formulare proposte per la riqualificazione dei territori aquilani colpiti dal sisma. Nello specifico il gruppo di Palermo si è occupato di sviluppare un piano di conoscenza con l’obiettivo di indagare il costruito locale con riferimento all’altopiano di Navelli in generale ed in particolare a quello del centro di Caporciano. L’indagine, accompagnata da una intensa campagna fotografica, si è concentrata sul patrimonio edilizio storico non monumentale e sui sistemi costruttivi sia nel…

Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider

2014

Measurements of multi-particle azimuthal correlations (cumulants) for charged particles in p-Pb and Pb-Pb collisions are presented. They help address the question of whether there is evidence for global, flow-like, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a $|\Delta \eta|$ gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high-multiplicity, indicating the prese…

The human peroxisome in health and disease: The story of an oddity becoming a vital organelle

2013

Abstract Since the first report by Rhodin in 1954, our knowledge on mammalian microbodies/peroxisomes has known several periods. An initial two decades period (1954–1973) has contributed to the biochemical individualisation of peroxisomes as a new class of subcellular organelles (de Duve, 1965). The corresponding research period failed to define a clear role of mammalian peroxisomes in vital functions and intermediary metabolism, explaining why feeling that peroxisomes might be in the human cell oddities has prevailed during several decades. The period standing from 1973 to nowadays has progressively removed this cell oddity view of peroxisomes by highlighting vital function and metabolic r…