Search results for "arco"
showing 10 items of 1716 documents
Aree marginali e sviluppo locale: Il Parco dei Monti Sicani
2010
Il lavoro analizza, nell’ambito dello sviluppo locale, la materialità del territorio intesa come sua ricchezza endogena in funzione della ricchezza dei luoghi ivi presente. A tal fine il lavoro analizza la recente istituzione in Sicilia del Parco dei Monti Sicani inserito all’interno di una vasta area interna della Sicilia, comprendente dodici comuni e che soffrono di evidenti criticità come la distanza geografica ed economica dai maggiori centri dell’Isola, il progressivo spopolamento e l’assenza di giovani, le debolezze del mercato del lavoro sia dal lato della domanda che dal lato dell’offerta. Oggetto dell’analisi è quello, invece, di associare a questa marginalità un’accezione positiva…
Global diversity and geography of soil fungi
2014
Fungi play integral roles in soil nutrient cycling, but the determinants of fungal diversity and biogeographic patterns of key functional groups remain poorly understood. By using pyrosequencing data from hundreds of globally distributed soil samples, we demonstrated fungal diversity that expands upon the taxonomic and molecular diversity recorded so far. Except for ectomycorrhizal symbionts, fungal functional group richness was unrelated to plant diversity and plant-to-fungus richness ratio declined exponentially towards the poles. Climatic factors, followed by edaphic and spatial variables, constituted the best predictors of fungal richness and community composition at the global scale. F…
Plant-herbivorous beetle networks : molecular characterization of trophic ecology within a threatened steppic environment
2015
DNA barcoding facilitates many evolutionary and ecological studies, including the examination of the dietary diversity of herbivores. In this study, we present a survey of ecological associations between herbivorous beetles and host plants from seriously threatened European steppic grasslands. We determined host plants for the majority (65%) of steppic leaf beetles (55 species) and weevils (59) known from central Europe using two barcodes (trnL and rbcL) and two sequencing strategies (Sanger for mono/oligophagous species and Illumina for polyphagous taxa). To better understand the ecological associations between steppic beetles and their host plants, we tested the hypothesis that leaf beetl…
Body composition with dual energy X-ray absorptiometry: from basics to new tools
2020
Dual-energy X-ray absorptiometry (DXA) in nowadays considered one of the most versatile imaging techniques for the evaluation of metabolic bone disorders such as osteoporosis, sarcopenia and obesity. The advantages of DXA over other imaging techniques are the very low radiation dose, its accuracy and simplicity of use. In addition, fat mass (FM) and lean mass (LM) values by DXA shows very good accuracy compared to that of computed tomography and magnetic resonance imaging. In this review we will explain the technical working principles of body composition with DXA, together with the possible limitations and pitfalls that should be avoided in daily routine to produce high-quality DXA examina…
Recurrent intussusception of small bowel in a young patient due to metastases from cardiac undifferentiated pleomorphic sarcoma: A first ever case re…
2020
Highlights • Metastatic undifferentiated pleomorphic sarcoma (Malignant Fibrous Histiocytoma) is a rare entity in the visceral organs. • We report a case of a metastatic primary cardiac undifferentiated pleomorphic sarcoma which presented with a recurrent small bowel intussusception in a young man. • Laparotomy by a small midline incision performed on the same day identified an intussusception of a 15-cm section of small intestine caused by a 4-cm intraluminal metastasis from undifferentiated pleomorphic sarcoma. • Metastasis intussusception in the small intestine is a very rare condition and they are part of differential diagnosis in patient with a history of tumor who present with intussu…
Advantages of surgical simulation in the surgical reconstruction of oncological patients
2018
Background Stereolithography, which consists of computer-aided designed/computer-aided manufactured (CAD-CAM) and computer simulations, is a manufacturing technologies used for the production of definitive models and prototypes printed in three dimensions, and is widely used in Oral and Maxillofacial Surgery. Surgical procedures using models made by these technologies offer several advantages. Material and Methods This article describes three clinical cases of our experiences with patients diagnosed with squamous cell carcinoma and mandibular osteosarcoma, who underwent surgical removal of the lesions and subsequent mandibular reconstruction with a free fibula graft using surgical guides. R…
Nutritional Status in Aging and Lung Disease
2016
Abstract Lung diseases exert a negative impact on nutritional status, especially among older patients where aging per se is already associated with relevant changes in nutrient intake, metabolism, and body composition. Both respiratory (increased respiratory work, hypoxia, and local oxidative stress and inflammation) and nonrespiratory (sarcopenia, reduced mitochondrial biogenesis and anabolic hormones, balance of orexigenic/anorexigenic neuropeptides, and systemic inflammation and oxidative stress) contribute to the association between lung diseases and malnutrition. For these reasons, nutritional assessments are of paramount importance in older patients with lung diseases. Current evidenc…
The biology of the metabolic syndrome and aging.
2015
Aging of the world population is a major contributor to the growing prevalence of the metabolic syndrome, as older persons are frequently affected by the constellation of cardiovascular and metabolic risk factors that constitute the syndrome. The metabolic syndrome has been related to the increasing prevalence of obesity, which is escalating even among older age groups. The present review covers data on the novel proposed biological mediators of the metabolic syndrome, which are as well linked to the aging process.Relevant biological mediators of metabolic syndrome and unhealthy aging include sarcopenic obesity, insulin resistance with ectopic fat accumulation, magnesium metabolism alterati…
Ewing sarcoma of the oral cavity. A review
2017
Objectives A review is made of the clinical, diagnostic, therapeutic and survival characteristics of Ewing sarcoma (ES) of the oral cavity. Material and methods A systematic literature search was carried out, with restrictions referred to time (1960-2014), language (English and Spanish) and type of study (case reports, letters, datasets, reviews). The following MeSH terms and boolean operators were used: Ewing AND Sarcoma AND [tongue, jaw, maxilla, cheek, condyle OR temporomandibular, floor AND mouth, gum OR gingiva, palate OR palatal, lip, uvula, head AND neck]. Results Seventy-one cases of ES of the oral cavity were documented from 53 articles. The main differences versus ES of other loca…
Addressing Delicate and Variable Cancer Morphology in Spectral Histopathology Using Canine Visceral Hemangiosarcoma
2021
Spectral histopathology has shown promise for the classification and diagnosis of tumors with defined morphology, but application in tumors with variable or diffuse morphologies is yet to be investigated. To address this gap, we evaluated the application of Fourier transform infrared (FTIR) imaging as an accessory diagnostic tool for canine hemangiosarcoma (HSA), a vascular endothelial cell cancer that is difficult to diagnose. To preserve the delicate vascular tumor tissue structure, and potential classification of single endothelial cells, paraffin removal was not performed, and a partial least square discrimination analysis (PLSDA) and Random Forest (RF) models to classify different tiss…